MagickCore  6.9.13-10
Convert, Edit, Or Compose Bitmap Images
draw.c
1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % DDDD RRRR AAA W W %
7 % D D R R A A W W %
8 % D D RRRR AAAAA W W W %
9 % D D R RN A A WW WW %
10 % DDDD R R A A W W %
11 % %
12 % %
13 % MagickCore Image Drawing Methods %
14 % %
15 % %
16 % Software Design %
17 % Cristy %
18 % July 1998 %
19 % %
20 % %
21 % Copyright 1999 ImageMagick Studio LLC, a non-profit organization %
22 % dedicated to making software imaging solutions freely available. %
23 % %
24 % You may not use this file except in compliance with the License. You may %
25 % obtain a copy of the License at %
26 % %
27 % https://imagemagick.org/script/license.php %
28 % %
29 % Unless required by applicable law or agreed to in writing, software %
30 % distributed under the License is distributed on an "AS IS" BASIS, %
31 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
32 % See the License for the specific language governing permissions and %
33 % limitations under the License. %
34 % %
35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
36 %
37 % Bill Radcliffe of Corbis (www.corbis.com) contributed the polygon
38 % rendering code based on Paul Heckbert's "Concave Polygon Scan Conversion",
39 % Graphics Gems, 1990. Leonard Rosenthal and David Harr of Appligent
40 % (www.appligent.com) contributed the dash pattern, linecap stroking
41 % algorithm, and minor rendering improvements.
42 %
43 */
44 ␌
45 /*
46  Include declarations.
47 */
48 #include "magick/studio.h"
49 #include "magick/annotate.h"
50 #include "magick/artifact.h"
51 #include "magick/blob.h"
52 #include "magick/cache.h"
53 #include "magick/cache-private.h"
54 #include "magick/cache-view.h"
55 #include "magick/channel.h"
56 #include "magick/color.h"
57 #include "magick/color-private.h"
58 #include "magick/colorspace.h"
59 #include "magick/colorspace-private.h"
60 #include "magick/composite.h"
61 #include "magick/composite-private.h"
62 #include "magick/constitute.h"
63 #include "magick/draw.h"
64 #include "magick/draw-private.h"
65 #include "magick/enhance.h"
66 #include "magick/exception.h"
67 #include "magick/exception-private.h"
68 #include "magick/gem.h"
69 #include "magick/geometry.h"
70 #include "magick/image-private.h"
71 #include "magick/list.h"
72 #include "magick/log.h"
73 #include "magick/magick.h"
74 #include "magick/memory-private.h"
75 #include "magick/monitor.h"
76 #include "magick/monitor-private.h"
77 #include "magick/option.h"
78 #include "magick/paint.h"
79 #include "magick/pixel-accessor.h"
80 #include "magick/pixel-private.h"
81 #include "magick/property.h"
82 #include "magick/resample.h"
83 #include "magick/resample-private.h"
84 #include "magick/resource_.h"
85 #include "magick/splay-tree.h"
86 #include "magick/string_.h"
87 #include "magick/string-private.h"
88 #include "magick/thread-private.h"
89 #include "magick/token.h"
90 #include "magick/transform.h"
91 #include "magick/utility.h"
92 ␌
93 /*
94  Define declarations.
95 */
96 #define AntialiasThreshold (1.0/3.0)
97 #define BezierQuantum 200
98 #define PrimitiveExtentPad 4296.0
99 #define MaxBezierCoordinates 67108864
100 #define ThrowPointExpectedException(image,token) \
101 { \
102  (void) ThrowMagickException(&(image)->exception,GetMagickModule(),DrawError, \
103  "NonconformingDrawingPrimitiveDefinition","`%s'",token); \
104  status=MagickFalse; \
105  break; \
106 }
107 ␌
108 /*
109  Typedef declarations.
110 */
111 typedef struct _EdgeInfo
112 {
114  bounds;
115 
116  double
117  scanline;
118 
119  PointInfo
120  *points;
121 
122  size_t
123  number_points;
124 
125  ssize_t
126  direction;
127 
128  MagickBooleanType
129  ghostline;
130 
131  size_t
132  highwater;
133 } EdgeInfo;
134 
135 typedef struct _ElementInfo
136 {
137  double
138  cx,
139  cy,
140  major,
141  minor,
142  angle;
143 } ElementInfo;
144 
145 typedef struct _MVGInfo
146 {
148  **primitive_info;
149 
150  size_t
151  *extent;
152 
153  ssize_t
154  offset;
155 
156  PointInfo
157  point;
158 
160  *exception;
161 } MVGInfo;
162 
163 typedef struct _PolygonInfo
164 {
165  EdgeInfo
166  *edges;
167 
168  size_t
169  number_edges;
170 } PolygonInfo;
171 
172 typedef enum
173 {
174  MoveToCode,
175  OpenCode,
176  GhostlineCode,
177  LineToCode,
178  EndCode
179 } PathInfoCode;
180 
181 typedef struct _PathInfo
182 {
183  PointInfo
184  point;
185 
186  PathInfoCode
187  code;
188 } PathInfo;
189 ␌
190 /*
191  Forward declarations.
192 */
193 static Image
194  *DrawClippingMask(Image *,const DrawInfo *,const char *,const char *,
195  ExceptionInfo *);
196 
197 static MagickBooleanType
198  DrawStrokePolygon(Image *,const DrawInfo *,const PrimitiveInfo *),
199  RenderMVGContent(Image *,const DrawInfo *,const size_t),
200  TraceArc(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
201  TraceArcPath(MVGInfo *,const PointInfo,const PointInfo,const PointInfo,
202  const double,const MagickBooleanType,const MagickBooleanType),
203  TraceBezier(MVGInfo *,const size_t),
204  TraceCircle(MVGInfo *,const PointInfo,const PointInfo),
205  TraceEllipse(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
206  TraceLine(PrimitiveInfo *,const PointInfo,const PointInfo),
207  TraceRectangle(PrimitiveInfo *,const PointInfo,const PointInfo),
208  TraceRoundRectangle(MVGInfo *,const PointInfo,const PointInfo,PointInfo),
209  TraceSquareLinecap(PrimitiveInfo *,const size_t,const double);
210 
211 static PrimitiveInfo
212  *TraceStrokePolygon(const DrawInfo *,const PrimitiveInfo *,ExceptionInfo *);
213 
214 static ssize_t
215  TracePath(Image *,MVGInfo *,const char *);
216 ␌
217 /*
218 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
219 % %
220 % %
221 % %
222 % A c q u i r e D r a w I n f o %
223 % %
224 % %
225 % %
226 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
227 %
228 % AcquireDrawInfo() returns a DrawInfo structure properly initialized.
229 %
230 % The format of the AcquireDrawInfo method is:
231 %
232 % DrawInfo *AcquireDrawInfo(void)
233 %
234 */
235 MagickExport DrawInfo *AcquireDrawInfo(void)
236 {
237  DrawInfo
238  *draw_info;
239 
240  draw_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*draw_info));
241  GetDrawInfo((ImageInfo *) NULL,draw_info);
242  return(draw_info);
243 }
244 ␌
245 /*
246 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
247 % %
248 % %
249 % %
250 % C l o n e D r a w I n f o %
251 % %
252 % %
253 % %
254 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
255 %
256 % CloneDrawInfo() makes a copy of the given draw_info structure. If NULL
257 % is specified, a new DrawInfo structure is created initialized to default
258 % values.
259 %
260 % The format of the CloneDrawInfo method is:
261 %
262 % DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
263 % const DrawInfo *draw_info)
264 %
265 % A description of each parameter follows:
266 %
267 % o image_info: the image info.
268 %
269 % o draw_info: the draw info.
270 %
271 */
272 MagickExport DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
273  const DrawInfo *draw_info)
274 {
275  DrawInfo
276  *clone_info;
277 
278  clone_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*clone_info));
279  GetDrawInfo(image_info,clone_info);
280  if (draw_info == (DrawInfo *) NULL)
281  return(clone_info);
282  if (draw_info->id != (char *) NULL)
283  (void) CloneString(&clone_info->id,draw_info->id);
284  if (draw_info->primitive != (char *) NULL)
285  (void) CloneString(&clone_info->primitive,draw_info->primitive);
286  if (draw_info->geometry != (char *) NULL)
287  (void) CloneString(&clone_info->geometry,draw_info->geometry);
288  clone_info->compliance=draw_info->compliance;
289  clone_info->viewbox=draw_info->viewbox;
290  clone_info->affine=draw_info->affine;
291  clone_info->gravity=draw_info->gravity;
292  clone_info->fill=draw_info->fill;
293  clone_info->stroke=draw_info->stroke;
294  clone_info->stroke_width=draw_info->stroke_width;
295  if (draw_info->fill_pattern != (Image *) NULL)
296  clone_info->fill_pattern=CloneImage(draw_info->fill_pattern,0,0,MagickTrue,
297  &draw_info->fill_pattern->exception);
298  else
299  if (draw_info->tile != (Image *) NULL)
300  clone_info->fill_pattern=CloneImage(draw_info->tile,0,0,MagickTrue,
301  &draw_info->tile->exception);
302  clone_info->tile=NewImageList(); /* tile is deprecated */
303  if (draw_info->stroke_pattern != (Image *) NULL)
304  clone_info->stroke_pattern=CloneImage(draw_info->stroke_pattern,0,0,
305  MagickTrue,&draw_info->stroke_pattern->exception);
306  clone_info->stroke_antialias=draw_info->stroke_antialias;
307  clone_info->text_antialias=draw_info->text_antialias;
308  clone_info->fill_rule=draw_info->fill_rule;
309  clone_info->linecap=draw_info->linecap;
310  clone_info->linejoin=draw_info->linejoin;
311  clone_info->miterlimit=draw_info->miterlimit;
312  clone_info->dash_offset=draw_info->dash_offset;
313  clone_info->decorate=draw_info->decorate;
314  clone_info->compose=draw_info->compose;
315  if (draw_info->text != (char *) NULL)
316  (void) CloneString(&clone_info->text,draw_info->text);
317  if (draw_info->font != (char *) NULL)
318  (void) CloneString(&clone_info->font,draw_info->font);
319  if (draw_info->metrics != (char *) NULL)
320  (void) CloneString(&clone_info->metrics,draw_info->metrics);
321  if (draw_info->family != (char *) NULL)
322  (void) CloneString(&clone_info->family,draw_info->family);
323  clone_info->style=draw_info->style;
324  clone_info->stretch=draw_info->stretch;
325  clone_info->weight=draw_info->weight;
326  if (draw_info->encoding != (char *) NULL)
327  (void) CloneString(&clone_info->encoding,draw_info->encoding);
328  clone_info->pointsize=draw_info->pointsize;
329  clone_info->kerning=draw_info->kerning;
330  clone_info->interline_spacing=draw_info->interline_spacing;
331  clone_info->interword_spacing=draw_info->interword_spacing;
332  clone_info->direction=draw_info->direction;
333  if (draw_info->density != (char *) NULL)
334  (void) CloneString(&clone_info->density,draw_info->density);
335  clone_info->align=draw_info->align;
336  clone_info->undercolor=draw_info->undercolor;
337  clone_info->border_color=draw_info->border_color;
338  if (draw_info->server_name != (char *) NULL)
339  (void) CloneString(&clone_info->server_name,draw_info->server_name);
340  if (draw_info->dash_pattern != (double *) NULL)
341  {
342  ssize_t
343  x;
344 
345  for (x=0; fabs(draw_info->dash_pattern[x]) >= MagickEpsilon; x++) ;
346  clone_info->dash_pattern=(double *) AcquireQuantumMemory((size_t) (2*x+2),
347  sizeof(*clone_info->dash_pattern));
348  if (clone_info->dash_pattern == (double *) NULL)
349  ThrowFatalException(ResourceLimitFatalError,
350  "UnableToAllocateDashPattern");
351  (void) memset(clone_info->dash_pattern,0,(size_t) (2*x+2)*
352  sizeof(*clone_info->dash_pattern));
353  (void) memcpy(clone_info->dash_pattern,draw_info->dash_pattern,(size_t)
354  (x+1)*sizeof(*clone_info->dash_pattern));
355  }
356  clone_info->gradient=draw_info->gradient;
357  if (draw_info->gradient.stops != (StopInfo *) NULL)
358  {
359  size_t
360  number_stops;
361 
362  number_stops=clone_info->gradient.number_stops;
363  clone_info->gradient.stops=(StopInfo *) AcquireQuantumMemory((size_t)
364  number_stops,sizeof(*clone_info->gradient.stops));
365  if (clone_info->gradient.stops == (StopInfo *) NULL)
366  ThrowFatalException(ResourceLimitFatalError,
367  "UnableToAllocateDashPattern");
368  (void) memcpy(clone_info->gradient.stops,draw_info->gradient.stops,
369  (size_t) number_stops*sizeof(*clone_info->gradient.stops));
370  }
371  clone_info->bounds=draw_info->bounds;
372  clone_info->fill_opacity=draw_info->fill_opacity;
373  clone_info->stroke_opacity=draw_info->stroke_opacity;
374  clone_info->element_reference=draw_info->element_reference;
375  clone_info->clip_path=draw_info->clip_path;
376  clone_info->clip_units=draw_info->clip_units;
377  if (draw_info->clip_mask != (char *) NULL)
378  (void) CloneString(&clone_info->clip_mask,draw_info->clip_mask);
379  if (draw_info->clipping_mask != (Image *) NULL)
380  clone_info->clipping_mask=CloneImage(draw_info->clipping_mask,0,0,
381  MagickTrue,&draw_info->clipping_mask->exception);
382  if (draw_info->composite_mask != (Image *) NULL)
383  clone_info->composite_mask=CloneImage(draw_info->composite_mask,0,0,
384  MagickTrue,&draw_info->composite_mask->exception);
385  clone_info->render=draw_info->render;
386  clone_info->debug=draw_info->debug;
387  return(clone_info);
388 }
389 ␌
390 /*
391 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
392 % %
393 % %
394 % %
395 + C o n v e r t P a t h T o P o l y g o n %
396 % %
397 % %
398 % %
399 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
400 %
401 % ConvertPathToPolygon() converts a path to the more efficient sorted
402 % rendering form.
403 %
404 % The format of the ConvertPathToPolygon method is:
405 %
406 % PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info,
407 % ExceptionInfo *exception)
408 %
409 % A description of each parameter follows:
410 %
411 % o ConvertPathToPolygon() returns the path in a more efficient sorted
412 % rendering form of type PolygonInfo.
413 %
414 % o draw_info: Specifies a pointer to an DrawInfo structure.
415 %
416 % o path_info: Specifies a pointer to an PathInfo structure.
417 %
418 % o exception: return any errors or warnings in this structure.
419 %
420 */
421 
422 static PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
423 {
424  ssize_t
425  i;
426 
427  if (polygon_info->edges != (EdgeInfo *) NULL)
428  {
429  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
430  if (polygon_info->edges[i].points != (PointInfo *) NULL)
431  polygon_info->edges[i].points=(PointInfo *)
432  RelinquishMagickMemory(polygon_info->edges[i].points);
433  polygon_info->edges=(EdgeInfo *) RelinquishMagickMemory(
434  polygon_info->edges);
435  }
436  return((PolygonInfo *) RelinquishMagickMemory(polygon_info));
437 }
438 
439 #if defined(__cplusplus) || defined(c_plusplus)
440 extern "C" {
441 #endif
442 
443 static int DrawCompareEdges(const void *p_edge,const void *q_edge)
444 {
445 #define DrawCompareEdge(p,q) \
446 { \
447  if (((p)-(q)) < 0.0) \
448  return(-1); \
449  if (((p)-(q)) > 0.0) \
450  return(1); \
451 }
452 
453  const PointInfo
454  *p,
455  *q;
456 
457  /*
458  Edge sorting for right-handed coordinate system.
459  */
460  p=((const EdgeInfo *) p_edge)->points;
461  q=((const EdgeInfo *) q_edge)->points;
462  DrawCompareEdge(p[0].y,q[0].y);
463  DrawCompareEdge(p[0].x,q[0].x);
464  DrawCompareEdge((p[1].x-p[0].x)*(q[1].y-q[0].y),(p[1].y-p[0].y)*
465  (q[1].x-q[0].x));
466  DrawCompareEdge(p[1].y,q[1].y);
467  DrawCompareEdge(p[1].x,q[1].x);
468  return(0);
469 }
470 
471 #if defined(__cplusplus) || defined(c_plusplus)
472 }
473 #endif
474 
475 static void LogPolygonInfo(const PolygonInfo *polygon_info)
476 {
477  EdgeInfo
478  *p;
479 
480  ssize_t
481  i,
482  j;
483 
484  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin active-edge");
485  p=polygon_info->edges;
486  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
487  {
488  (void) LogMagickEvent(DrawEvent,GetMagickModule()," edge %.20g:",
489  (double) i);
490  (void) LogMagickEvent(DrawEvent,GetMagickModule()," direction: %s",
491  p->direction != MagickFalse ? "down" : "up");
492  (void) LogMagickEvent(DrawEvent,GetMagickModule()," ghostline: %s",
493  p->ghostline != MagickFalse ? "transparent" : "opaque");
494  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
495  " bounds: %g,%g - %g,%g",p->bounds.x1,p->bounds.y1,
496  p->bounds.x2,p->bounds.y2);
497  for (j=0; j < (ssize_t) p->number_points; j++)
498  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %g,%g",
499  p->points[j].x,p->points[j].y);
500  p++;
501  }
502  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end active-edge");
503 }
504 
505 static void ReversePoints(PointInfo *points,const size_t number_points)
506 {
507  PointInfo
508  point;
509 
510  ssize_t
511  i;
512 
513  for (i=0; i < (ssize_t) (number_points >> 1); i++)
514  {
515  point=points[i];
516  points[i]=points[number_points-(i+1)];
517  points[number_points-(i+1)]=point;
518  }
519 }
520 
521 static PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info,
522  ExceptionInfo *exception)
523 {
524  long
525  direction,
526  next_direction;
527 
528  PointInfo
529  point,
530  *points;
531 
533  *polygon_info;
534 
536  bounds;
537 
538  ssize_t
539  i,
540  n;
541 
542  MagickBooleanType
543  ghostline;
544 
545  size_t
546  edge,
547  number_edges,
548  number_points;
549 
550  /*
551  Convert a path to the more efficient sorted rendering form.
552  */
553  polygon_info=(PolygonInfo *) AcquireMagickMemory(sizeof(*polygon_info));
554  if (polygon_info == (PolygonInfo *) NULL)
555  {
556  (void) ThrowMagickException(exception,GetMagickModule(),
557  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
558  return((PolygonInfo *) NULL);
559  }
560  number_edges=16;
561  polygon_info->edges=(EdgeInfo *) AcquireQuantumMemory(number_edges,
562  sizeof(*polygon_info->edges));
563  if (polygon_info->edges == (EdgeInfo *) NULL)
564  {
565  (void) ThrowMagickException(exception,GetMagickModule(),
566  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
567  return(DestroyPolygonInfo(polygon_info));
568  }
569  (void) memset(polygon_info->edges,0,number_edges*
570  sizeof(*polygon_info->edges));
571  direction=0;
572  edge=0;
573  ghostline=MagickFalse;
574  n=0;
575  number_points=0;
576  points=(PointInfo *) NULL;
577  (void) memset(&point,0,sizeof(point));
578  (void) memset(&bounds,0,sizeof(bounds));
579  polygon_info->edges[edge].number_points=(size_t) n;
580  polygon_info->edges[edge].scanline=0.0;
581  polygon_info->edges[edge].highwater=0;
582  polygon_info->edges[edge].ghostline=ghostline;
583  polygon_info->edges[edge].direction=(ssize_t) direction;
584  polygon_info->edges[edge].points=points;
585  polygon_info->edges[edge].bounds=bounds;
586  polygon_info->number_edges=0;
587  for (i=0; path_info[i].code != EndCode; i++)
588  {
589  if ((path_info[i].code == MoveToCode) || (path_info[i].code == OpenCode) ||
590  (path_info[i].code == GhostlineCode))
591  {
592  /*
593  Move to.
594  */
595  if ((points != (PointInfo *) NULL) && (n >= 2))
596  {
597  if (edge == number_edges)
598  {
599  number_edges<<=1;
600  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
601  polygon_info->edges,(size_t) number_edges,
602  sizeof(*polygon_info->edges));
603  if (polygon_info->edges == (EdgeInfo *) NULL)
604  {
605  (void) ThrowMagickException(exception,GetMagickModule(),
606  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
607  points=(PointInfo *) RelinquishMagickMemory(points);
608  return(DestroyPolygonInfo(polygon_info));
609  }
610  }
611  polygon_info->edges[edge].number_points=(size_t) n;
612  polygon_info->edges[edge].scanline=(-1.0);
613  polygon_info->edges[edge].highwater=0;
614  polygon_info->edges[edge].ghostline=ghostline;
615  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
616  if (direction < 0)
617  ReversePoints(points,(size_t) n);
618  polygon_info->edges[edge].points=points;
619  polygon_info->edges[edge].bounds=bounds;
620  polygon_info->edges[edge].bounds.y1=points[0].y;
621  polygon_info->edges[edge].bounds.y2=points[n-1].y;
622  points=(PointInfo *) NULL;
623  ghostline=MagickFalse;
624  edge++;
625  polygon_info->number_edges=edge;
626  }
627  if (points == (PointInfo *) NULL)
628  {
629  number_points=16;
630  points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
631  sizeof(*points));
632  if (points == (PointInfo *) NULL)
633  {
634  (void) ThrowMagickException(exception,GetMagickModule(),
635  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
636  return(DestroyPolygonInfo(polygon_info));
637  }
638  }
639  ghostline=path_info[i].code == GhostlineCode ? MagickTrue : MagickFalse;
640  point=path_info[i].point;
641  points[0]=point;
642  bounds.x1=point.x;
643  bounds.x2=point.x;
644  direction=0;
645  n=1;
646  continue;
647  }
648  /*
649  Line to.
650  */
651  next_direction=((path_info[i].point.y > point.y) ||
652  ((fabs(path_info[i].point.y-point.y) < MagickEpsilon) &&
653  (path_info[i].point.x > point.x))) ? 1 : -1;
654  if ((points != (PointInfo *) NULL) && (direction != 0) &&
655  (direction != next_direction))
656  {
657  /*
658  New edge.
659  */
660  point=points[n-1];
661  if (edge == number_edges)
662  {
663  number_edges<<=1;
664  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
665  polygon_info->edges,(size_t) number_edges,
666  sizeof(*polygon_info->edges));
667  if (polygon_info->edges == (EdgeInfo *) NULL)
668  {
669  (void) ThrowMagickException(exception,GetMagickModule(),
670  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
671  points=(PointInfo *) RelinquishMagickMemory(points);
672  return(DestroyPolygonInfo(polygon_info));
673  }
674  }
675  polygon_info->edges[edge].number_points=(size_t) n;
676  polygon_info->edges[edge].scanline=(-1.0);
677  polygon_info->edges[edge].highwater=0;
678  polygon_info->edges[edge].ghostline=ghostline;
679  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
680  if (direction < 0)
681  ReversePoints(points,(size_t) n);
682  polygon_info->edges[edge].points=points;
683  polygon_info->edges[edge].bounds=bounds;
684  polygon_info->edges[edge].bounds.y1=points[0].y;
685  polygon_info->edges[edge].bounds.y2=points[n-1].y;
686  polygon_info->number_edges=edge+1;
687  points=(PointInfo *) NULL;
688  number_points=16;
689  points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
690  sizeof(*points));
691  if (points == (PointInfo *) NULL)
692  {
693  (void) ThrowMagickException(exception,GetMagickModule(),
694  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
695  return(DestroyPolygonInfo(polygon_info));
696  }
697  n=1;
698  ghostline=MagickFalse;
699  points[0]=point;
700  bounds.x1=point.x;
701  bounds.x2=point.x;
702  edge++;
703  }
704  direction=next_direction;
705  if (points == (PointInfo *) NULL)
706  continue;
707  if (n == (ssize_t) number_points)
708  {
709  number_points<<=1;
710  points=(PointInfo *) ResizeQuantumMemory(points,(size_t) number_points,
711  sizeof(*points));
712  if (points == (PointInfo *) NULL)
713  {
714  (void) ThrowMagickException(exception,GetMagickModule(),
715  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
716  return(DestroyPolygonInfo(polygon_info));
717  }
718  }
719  point=path_info[i].point;
720  points[n]=point;
721  if (point.x < bounds.x1)
722  bounds.x1=point.x;
723  if (point.x > bounds.x2)
724  bounds.x2=point.x;
725  n++;
726  }
727  if (points != (PointInfo *) NULL)
728  {
729  if (n < 2)
730  points=(PointInfo *) RelinquishMagickMemory(points);
731  else
732  {
733  if (edge == number_edges)
734  {
735  number_edges<<=1;
736  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
737  polygon_info->edges,(size_t) number_edges,
738  sizeof(*polygon_info->edges));
739  if (polygon_info->edges == (EdgeInfo *) NULL)
740  {
741  (void) ThrowMagickException(exception,GetMagickModule(),
742  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
743  return(DestroyPolygonInfo(polygon_info));
744  }
745  }
746  polygon_info->edges[edge].number_points=(size_t) n;
747  polygon_info->edges[edge].scanline=(-1.0);
748  polygon_info->edges[edge].highwater=0;
749  polygon_info->edges[edge].ghostline=ghostline;
750  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
751  if (direction < 0)
752  ReversePoints(points,(size_t) n);
753  polygon_info->edges[edge].points=points;
754  polygon_info->edges[edge].bounds=bounds;
755  polygon_info->edges[edge].bounds.y1=points[0].y;
756  polygon_info->edges[edge].bounds.y2=points[n-1].y;
757  points=(PointInfo *) NULL;
758  ghostline=MagickFalse;
759  edge++;
760  polygon_info->number_edges=edge;
761  }
762  }
763  polygon_info->number_edges=edge;
764  polygon_info->number_edges=edge;
765  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(polygon_info->edges,
766  polygon_info->number_edges,sizeof(*polygon_info->edges));
767  if (polygon_info->edges == (EdgeInfo *) NULL)
768  {
769  (void) ThrowMagickException(exception,GetMagickModule(),
770  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
771  return(DestroyPolygonInfo(polygon_info));
772  }
773  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
774  {
775  EdgeInfo
776  *edge_info;
777 
778  edge_info=polygon_info->edges+i;
779  edge_info->points=(PointInfo *) ResizeQuantumMemory(edge_info->points,
780  edge_info->number_points,sizeof(*edge_info->points));
781  if (edge_info->points == (PointInfo *) NULL)
782  {
783  (void) ThrowMagickException(exception,GetMagickModule(),
784  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
785  return(DestroyPolygonInfo(polygon_info));
786  }
787  }
788  qsort(polygon_info->edges,(size_t) polygon_info->number_edges,
789  sizeof(*polygon_info->edges),DrawCompareEdges);
790  if ((GetLogEventMask() & DrawEvent) != 0)
791  LogPolygonInfo(polygon_info);
792  return(polygon_info);
793 }
794 ␌
795 /*
796 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
797 % %
798 % %
799 % %
800 + C o n v e r t P r i m i t i v e T o P a t h %
801 % %
802 % %
803 % %
804 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
805 %
806 % ConvertPrimitiveToPath() converts a PrimitiveInfo structure into a vector
807 % path structure.
808 %
809 % The format of the ConvertPrimitiveToPath method is:
810 %
811 % PathInfo *ConvertPrimitiveToPath(const DrawInfo *draw_info,
812 % const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
813 %
814 % A description of each parameter follows:
815 %
816 % o ConvertPrimitiveToPath() returns a vector path structure of type
817 % PathInfo.
818 %
819 % o draw_info: a structure of type DrawInfo.
820 %
821 % o primitive_info: Specifies a pointer to an PrimitiveInfo structure.
822 %
823 %
824 */
825 
826 static void LogPathInfo(const PathInfo *path_info)
827 {
828  const PathInfo
829  *p;
830 
831  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin vector-path");
832  for (p=path_info; p->code != EndCode; p++)
833  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
834  " %g,%g %s",p->point.x,p->point.y,p->code == GhostlineCode ?
835  "moveto ghostline" : p->code == OpenCode ? "moveto open" :
836  p->code == MoveToCode ? "moveto" : p->code == LineToCode ? "lineto" :
837  "?");
838  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end vector-path");
839 }
840 
841 static PathInfo *ConvertPrimitiveToPath(
842  const DrawInfo *magick_unused(draw_info),const PrimitiveInfo *primitive_info,
843  ExceptionInfo *exception)
844 {
845  MagickBooleanType
846  closed_subpath;
847 
848  PathInfo
849  *path_info;
850 
851  PathInfoCode
852  code;
853 
854  PointInfo
855  p,
856  q;
857 
858  ssize_t
859  i,
860  n;
861 
862  ssize_t
863  coordinates,
864  start;
865 
866  magick_unreferenced(draw_info);
867 
868  /*
869  Converts a PrimitiveInfo structure into a vector path structure.
870  */
871  switch (primitive_info->primitive)
872  {
873  case PointPrimitive:
874  case ColorPrimitive:
875  case MattePrimitive:
876  case TextPrimitive:
877  case ImagePrimitive:
878  return((PathInfo *) NULL);
879  default:
880  break;
881  }
882  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
883  path_info=(PathInfo *) AcquireQuantumMemory((size_t) (3UL*i+1UL),
884  sizeof(*path_info));
885  if (path_info == (PathInfo *) NULL)
886  {
887  (void) ThrowMagickException(exception,GetMagickModule(),
888  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
889  return((PathInfo *) NULL);
890  }
891  coordinates=0;
892  closed_subpath=MagickFalse;
893  n=0;
894  p.x=(-1.0);
895  p.y=(-1.0);
896  q.x=(-1.0);
897  q.y=(-1.0);
898  start=0;
899  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
900  {
901  code=LineToCode;
902  if (coordinates <= 0)
903  {
904  /*
905  New subpath.
906  */
907  coordinates=(ssize_t) primitive_info[i].coordinates;
908  p=primitive_info[i].point;
909  start=n;
910  code=MoveToCode;
911  closed_subpath=primitive_info[i].closed_subpath;
912  }
913  coordinates--;
914  if ((code == MoveToCode) || (coordinates <= 0) ||
915  (fabs(q.x-primitive_info[i].point.x) >= MagickEpsilon) ||
916  (fabs(q.y-primitive_info[i].point.y) >= MagickEpsilon))
917  {
918  /*
919  Eliminate duplicate points.
920  */
921  path_info[n].code=code;
922  path_info[n].point=primitive_info[i].point;
923  q=primitive_info[i].point;
924  n++;
925  }
926  if (coordinates > 0)
927  continue; /* next point in current subpath */
928  if (closed_subpath != MagickFalse)
929  {
930  closed_subpath=MagickFalse;
931  continue;
932  }
933  /*
934  Mark the p point as open if the subpath is not closed.
935  */
936  path_info[start].code=OpenCode;
937  path_info[n].code=GhostlineCode;
938  path_info[n].point=primitive_info[i].point;
939  n++;
940  path_info[n].code=LineToCode;
941  path_info[n].point=p;
942  n++;
943  }
944  path_info[n].code=EndCode;
945  path_info[n].point.x=0.0;
946  path_info[n].point.y=0.0;
947  if (IsEventLogging() != MagickFalse)
948  LogPathInfo(path_info);
949  path_info=(PathInfo *) ResizeQuantumMemory(path_info,(size_t) (n+1),
950  sizeof(*path_info));
951  return(path_info);
952 }
953 ␌
954 /*
955 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
956 % %
957 % %
958 % %
959 % D e s t r o y D r a w I n f o %
960 % %
961 % %
962 % %
963 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
964 %
965 % DestroyDrawInfo() deallocates memory associated with an DrawInfo structure.
966 %
967 % The format of the DestroyDrawInfo method is:
968 %
969 % DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
970 %
971 % A description of each parameter follows:
972 %
973 % o draw_info: the draw info.
974 %
975 */
976 MagickExport DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
977 {
978  assert(draw_info != (DrawInfo *) NULL);
979  assert(draw_info->signature == MagickCoreSignature);
980  if (IsEventLogging() != MagickFalse)
981  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
982  if (draw_info->id != (char *) NULL)
983  draw_info->id=DestroyString(draw_info->id);
984  if (draw_info->primitive != (char *) NULL)
985  draw_info->primitive=DestroyString(draw_info->primitive);
986  if (draw_info->text != (char *) NULL)
987  draw_info->text=DestroyString(draw_info->text);
988  if (draw_info->geometry != (char *) NULL)
989  draw_info->geometry=DestroyString(draw_info->geometry);
990  if (draw_info->tile != (Image *) NULL)
991  draw_info->tile=DestroyImage(draw_info->tile);
992  if (draw_info->fill_pattern != (Image *) NULL)
993  draw_info->fill_pattern=DestroyImage(draw_info->fill_pattern);
994  if (draw_info->stroke_pattern != (Image *) NULL)
995  draw_info->stroke_pattern=DestroyImage(draw_info->stroke_pattern);
996  if (draw_info->font != (char *) NULL)
997  draw_info->font=DestroyString(draw_info->font);
998  if (draw_info->metrics != (char *) NULL)
999  draw_info->metrics=DestroyString(draw_info->metrics);
1000  if (draw_info->family != (char *) NULL)
1001  draw_info->family=DestroyString(draw_info->family);
1002  if (draw_info->encoding != (char *) NULL)
1003  draw_info->encoding=DestroyString(draw_info->encoding);
1004  if (draw_info->density != (char *) NULL)
1005  draw_info->density=DestroyString(draw_info->density);
1006  if (draw_info->server_name != (char *) NULL)
1007  draw_info->server_name=(char *)
1008  RelinquishMagickMemory(draw_info->server_name);
1009  if (draw_info->dash_pattern != (double *) NULL)
1010  draw_info->dash_pattern=(double *) RelinquishMagickMemory(
1011  draw_info->dash_pattern);
1012  if (draw_info->gradient.stops != (StopInfo *) NULL)
1013  draw_info->gradient.stops=(StopInfo *) RelinquishMagickMemory(
1014  draw_info->gradient.stops);
1015  if (draw_info->clip_mask != (char *) NULL)
1016  draw_info->clip_mask=DestroyString(draw_info->clip_mask);
1017  if (draw_info->clipping_mask != (Image *) NULL)
1018  draw_info->clipping_mask=DestroyImage(draw_info->clipping_mask);
1019  if (draw_info->composite_mask != (Image *) NULL)
1020  draw_info->composite_mask=DestroyImage(draw_info->composite_mask);
1021  if (draw_info->image_info != (ImageInfo *) NULL)
1022  draw_info->image_info=DestroyImageInfo(draw_info->image_info);
1023  draw_info->signature=(~MagickCoreSignature);
1024  draw_info=(DrawInfo *) RelinquishMagickMemory(draw_info);
1025  return(draw_info);
1026 }
1027 ␌
1028 /*
1029 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1030 % %
1031 % %
1032 % %
1033 % D r a w A f f i n e I m a g e %
1034 % %
1035 % %
1036 % %
1037 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1038 %
1039 % DrawAffineImage() composites the source over the destination image as
1040 % dictated by the affine transform.
1041 %
1042 % The format of the DrawAffineImage method is:
1043 %
1044 % MagickBooleanType DrawAffineImage(Image *image,const Image *source,
1045 % const AffineMatrix *affine)
1046 %
1047 % A description of each parameter follows:
1048 %
1049 % o image: the image.
1050 %
1051 % o source: the source image.
1052 %
1053 % o affine: the affine transform.
1054 %
1055 */
1056 
1057 static SegmentInfo AffineEdge(const Image *image,const AffineMatrix *affine,
1058  const double y,const SegmentInfo *edge)
1059 {
1060  double
1061  intercept,
1062  z;
1063 
1064  double
1065  x;
1066 
1067  SegmentInfo
1068  inverse_edge;
1069 
1070  /*
1071  Determine left and right edges.
1072  */
1073  inverse_edge.x1=edge->x1;
1074  inverse_edge.y1=edge->y1;
1075  inverse_edge.x2=edge->x2;
1076  inverse_edge.y2=edge->y2;
1077  z=affine->ry*y+affine->tx;
1078  if (affine->sx >= MagickEpsilon)
1079  {
1080  intercept=(-z/affine->sx);
1081  x=intercept;
1082  if (x > inverse_edge.x1)
1083  inverse_edge.x1=x;
1084  intercept=(-z+(double) image->columns)/affine->sx;
1085  x=intercept;
1086  if (x < inverse_edge.x2)
1087  inverse_edge.x2=x;
1088  }
1089  else
1090  if (affine->sx < -MagickEpsilon)
1091  {
1092  intercept=(-z+(double) image->columns)/affine->sx;
1093  x=intercept;
1094  if (x > inverse_edge.x1)
1095  inverse_edge.x1=x;
1096  intercept=(-z/affine->sx);
1097  x=intercept;
1098  if (x < inverse_edge.x2)
1099  inverse_edge.x2=x;
1100  }
1101  else
1102  if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->columns))
1103  {
1104  inverse_edge.x2=edge->x1;
1105  return(inverse_edge);
1106  }
1107  /*
1108  Determine top and bottom edges.
1109  */
1110  z=affine->sy*y+affine->ty;
1111  if (affine->rx >= MagickEpsilon)
1112  {
1113  intercept=(-z/affine->rx);
1114  x=intercept;
1115  if (x > inverse_edge.x1)
1116  inverse_edge.x1=x;
1117  intercept=(-z+(double) image->rows)/affine->rx;
1118  x=intercept;
1119  if (x < inverse_edge.x2)
1120  inverse_edge.x2=x;
1121  }
1122  else
1123  if (affine->rx < -MagickEpsilon)
1124  {
1125  intercept=(-z+(double) image->rows)/affine->rx;
1126  x=intercept;
1127  if (x > inverse_edge.x1)
1128  inverse_edge.x1=x;
1129  intercept=(-z/affine->rx);
1130  x=intercept;
1131  if (x < inverse_edge.x2)
1132  inverse_edge.x2=x;
1133  }
1134  else
1135  if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->rows))
1136  {
1137  inverse_edge.x2=edge->x2;
1138  return(inverse_edge);
1139  }
1140  return(inverse_edge);
1141 }
1142 
1143 static AffineMatrix InverseAffineMatrix(const AffineMatrix *affine)
1144 {
1145  AffineMatrix
1146  inverse_affine;
1147 
1148  double
1149  determinant;
1150 
1151  determinant=PerceptibleReciprocal(affine->sx*affine->sy-affine->rx*
1152  affine->ry);
1153  inverse_affine.sx=determinant*affine->sy;
1154  inverse_affine.rx=determinant*(-affine->rx);
1155  inverse_affine.ry=determinant*(-affine->ry);
1156  inverse_affine.sy=determinant*affine->sx;
1157  inverse_affine.tx=(-affine->tx)*inverse_affine.sx-affine->ty*
1158  inverse_affine.ry;
1159  inverse_affine.ty=(-affine->tx)*inverse_affine.rx-affine->ty*
1160  inverse_affine.sy;
1161  return(inverse_affine);
1162 }
1163 
1164 MagickExport MagickBooleanType DrawAffineImage(Image *image,
1165  const Image *source,const AffineMatrix *affine)
1166 {
1167  AffineMatrix
1168  inverse_affine;
1169 
1170  CacheView
1171  *image_view,
1172  *source_view;
1173 
1175  *exception;
1176 
1177  MagickBooleanType
1178  status;
1179 
1181  zero;
1182 
1183  PointInfo
1184  extent[4],
1185  min,
1186  max,
1187  point;
1188 
1189  ssize_t
1190  i;
1191 
1192  SegmentInfo
1193  edge;
1194 
1195  ssize_t
1196  start,
1197  stop,
1198  y;
1199 
1200  /*
1201  Determine bounding box.
1202  */
1203  assert(image != (Image *) NULL);
1204  assert(image->signature == MagickCoreSignature);
1205  assert(source != (const Image *) NULL);
1206  assert(source->signature == MagickCoreSignature);
1207  if (IsEventLogging() != MagickFalse)
1208  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1209  assert(affine != (AffineMatrix *) NULL);
1210  extent[0].x=0.0;
1211  extent[0].y=0.0;
1212  extent[1].x=(double) source->columns;
1213  extent[1].y=0.0;
1214  extent[2].x=(double) source->columns;
1215  extent[2].y=(double) source->rows;
1216  extent[3].x=0.0;
1217  extent[3].y=(double) source->rows;
1218  for (i=0; i < 4; i++)
1219  {
1220  point=extent[i];
1221  extent[i].x=point.x*affine->sx+point.y*affine->ry+affine->tx;
1222  extent[i].y=point.x*affine->rx+point.y*affine->sy+affine->ty;
1223  }
1224  min=extent[0];
1225  max=extent[0];
1226  for (i=1; i < 4; i++)
1227  {
1228  if (min.x > extent[i].x)
1229  min.x=extent[i].x;
1230  if (min.y > extent[i].y)
1231  min.y=extent[i].y;
1232  if (max.x < extent[i].x)
1233  max.x=extent[i].x;
1234  if (max.y < extent[i].y)
1235  max.y=extent[i].y;
1236  }
1237  /*
1238  Affine transform image.
1239  */
1240  if (SetImageStorageClass(image,DirectClass) == MagickFalse)
1241  return(MagickFalse);
1242  status=MagickTrue;
1243  edge.x1=min.x;
1244  edge.y1=min.y;
1245  edge.x2=max.x;
1246  edge.y2=max.y;
1247  inverse_affine=InverseAffineMatrix(affine);
1248  if (edge.y1 < 0.0)
1249  edge.y1=0.0;
1250  if (edge.y2 > (image->rows-1.0))
1251  edge.y2=image->rows-1.0;
1252  GetMagickPixelPacket(image,&zero);
1253  exception=(&image->exception);
1254  start=CastDoubleToLong(ceil(edge.y1-0.5));
1255  stop=CastDoubleToLong(floor(edge.y2+0.5));
1256  source_view=AcquireVirtualCacheView(source,exception);
1257  image_view=AcquireAuthenticCacheView(image,exception);
1258 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1259  #pragma omp parallel for schedule(static) shared(status) \
1260  magick_number_threads(source,image,stop-start,1)
1261 #endif
1262  for (y=start; y <= stop; y++)
1263  {
1264  IndexPacket
1265  *magick_restrict indexes;
1266 
1268  composite,
1269  pixel;
1270 
1271  PointInfo
1272  point;
1273 
1274  PixelPacket
1275  *magick_restrict q;
1276 
1277  SegmentInfo
1278  inverse_edge;
1279 
1280  ssize_t
1281  x,
1282  x_offset;
1283 
1284  if (status == MagickFalse)
1285  continue;
1286  inverse_edge=AffineEdge(source,&inverse_affine,(double) y,&edge);
1287  if (inverse_edge.x2 < inverse_edge.x1)
1288  continue;
1289  if (inverse_edge.x1 < 0.0)
1290  inverse_edge.x1=0.0;
1291  if (inverse_edge.x2 > image->columns-1.0)
1292  inverse_edge.x2=image->columns-1.0;
1293  q=GetCacheViewAuthenticPixels(image_view,CastDoubleToLong(
1294  ceil(inverse_edge.x1-0.5)),y,(size_t) CastDoubleToLong(floor(
1295  inverse_edge.x2+0.5)-ceil(inverse_edge.x1-0.5)+1),1,exception);
1296  if (q == (PixelPacket *) NULL)
1297  continue;
1298  indexes=GetCacheViewAuthenticIndexQueue(image_view);
1299  pixel=zero;
1300  composite=zero;
1301  x_offset=0;
1302  for (x=CastDoubleToLong(ceil(inverse_edge.x1-0.5));
1303  x <= CastDoubleToLong(floor(inverse_edge.x2+0.5)); x++)
1304  {
1305  point.x=(double) x*inverse_affine.sx+y*inverse_affine.ry+
1306  inverse_affine.tx;
1307  point.y=(double) x*inverse_affine.rx+y*inverse_affine.sy+
1308  inverse_affine.ty;
1309  status=InterpolateMagickPixelPacket(source,source_view,
1310  UndefinedInterpolatePixel,point.x,point.y,&pixel,exception);
1311  if (status == MagickFalse)
1312  break;
1313  SetMagickPixelPacket(image,q,indexes+x_offset,&composite);
1314  MagickPixelCompositeOver(&pixel,pixel.opacity,&composite,
1315  composite.opacity,&composite);
1316  SetPixelPacket(image,&composite,q,indexes+x_offset);
1317  x_offset++;
1318  q++;
1319  }
1320  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1321  status=MagickFalse;
1322  }
1323  source_view=DestroyCacheView(source_view);
1324  image_view=DestroyCacheView(image_view);
1325  return(status);
1326 }
1327 ␌
1328 /*
1329 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1330 % %
1331 % %
1332 % %
1333 + D r a w B o u n d i n g R e c t a n g l e s %
1334 % %
1335 % %
1336 % %
1337 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1338 %
1339 % DrawBoundingRectangles() draws the bounding rectangles on the image. This
1340 % is only useful for developers debugging the rendering algorithm.
1341 %
1342 % The format of the DrawBoundingRectangles method is:
1343 %
1344 % MagickBooleanType DrawBoundingRectangles(Image *image,
1345 % const DrawInfo *draw_info,PolygonInfo *polygon_info)
1346 %
1347 % A description of each parameter follows:
1348 %
1349 % o image: the image.
1350 %
1351 % o draw_info: the draw info.
1352 %
1353 % o polygon_info: Specifies a pointer to a PolygonInfo structure.
1354 %
1355 */
1356 
1357 static MagickBooleanType DrawBoundingRectangles(Image *image,
1358  const DrawInfo *draw_info,const PolygonInfo *polygon_info)
1359 {
1360  double
1361  mid;
1362 
1363  DrawInfo
1364  *clone_info;
1365 
1366  MagickStatusType
1367  status;
1368 
1369  PointInfo
1370  end,
1371  resolution,
1372  start;
1373 
1375  primitive_info[6];
1376 
1377  ssize_t
1378  i;
1379 
1380  SegmentInfo
1381  bounds;
1382 
1383  ssize_t
1384  coordinates;
1385 
1386  (void) memset(primitive_info,0,sizeof(primitive_info));
1387  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1388  status=QueryColorDatabase("#0000",&clone_info->fill,&image->exception);
1389  if (status == MagickFalse)
1390  {
1391  clone_info=DestroyDrawInfo(clone_info);
1392  return(MagickFalse);
1393  }
1394  resolution.x=96.0;
1395  resolution.y=96.0;
1396  if (clone_info->density != (char *) NULL)
1397  {
1398  GeometryInfo
1399  geometry_info;
1400 
1401  MagickStatusType
1402  flags;
1403 
1404  flags=ParseGeometry(clone_info->density,&geometry_info);
1405  if ((flags & RhoValue) != 0)
1406  resolution.x=geometry_info.rho;
1407  resolution.y=resolution.x;
1408  if ((flags & SigmaValue) != 0)
1409  resolution.y=geometry_info.sigma;
1410  }
1411  mid=(resolution.x/96.0)*ExpandAffine(&clone_info->affine)*
1412  clone_info->stroke_width/2.0;
1413  bounds.x1=0.0;
1414  bounds.y1=0.0;
1415  bounds.x2=0.0;
1416  bounds.y2=0.0;
1417  if (polygon_info != (PolygonInfo *) NULL)
1418  {
1419  bounds=polygon_info->edges[0].bounds;
1420  for (i=1; i < (ssize_t) polygon_info->number_edges; i++)
1421  {
1422  if (polygon_info->edges[i].bounds.x1 < (double) bounds.x1)
1423  bounds.x1=polygon_info->edges[i].bounds.x1;
1424  if (polygon_info->edges[i].bounds.y1 < (double) bounds.y1)
1425  bounds.y1=polygon_info->edges[i].bounds.y1;
1426  if (polygon_info->edges[i].bounds.x2 > (double) bounds.x2)
1427  bounds.x2=polygon_info->edges[i].bounds.x2;
1428  if (polygon_info->edges[i].bounds.y2 > (double) bounds.y2)
1429  bounds.y2=polygon_info->edges[i].bounds.y2;
1430  }
1431  bounds.x1-=mid;
1432  bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double)
1433  image->columns ? (double) image->columns-1 : bounds.x1;
1434  bounds.y1-=mid;
1435  bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double)
1436  image->rows ? (double) image->rows-1 : bounds.y1;
1437  bounds.x2+=mid;
1438  bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double)
1439  image->columns ? (double) image->columns-1 : bounds.x2;
1440  bounds.y2+=mid;
1441  bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double)
1442  image->rows ? (double) image->rows-1 : bounds.y2;
1443  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
1444  {
1445  if (polygon_info->edges[i].direction != 0)
1446  status=QueryColorDatabase("#f00",&clone_info->stroke,
1447  &image->exception);
1448  else
1449  status=QueryColorDatabase("#0f0",&clone_info->stroke,
1450  &image->exception);
1451  if (status == MagickFalse)
1452  break;
1453  start.x=(double) (polygon_info->edges[i].bounds.x1-mid);
1454  start.y=(double) (polygon_info->edges[i].bounds.y1-mid);
1455  end.x=(double) (polygon_info->edges[i].bounds.x2+mid);
1456  end.y=(double) (polygon_info->edges[i].bounds.y2+mid);
1457  primitive_info[0].primitive=RectanglePrimitive;
1458  status&=TraceRectangle(primitive_info,start,end);
1459  primitive_info[0].method=ReplaceMethod;
1460  coordinates=(ssize_t) primitive_info[0].coordinates;
1461  primitive_info[coordinates].primitive=UndefinedPrimitive;
1462  status=DrawPrimitive(image,clone_info,primitive_info);
1463  if (status == MagickFalse)
1464  break;
1465  }
1466  if (i < (ssize_t) polygon_info->number_edges)
1467  {
1468  clone_info=DestroyDrawInfo(clone_info);
1469  return(status == 0 ? MagickFalse : MagickTrue);
1470  }
1471  }
1472  status=QueryColorDatabase("#00f",&clone_info->stroke,&image->exception);
1473  if (status == MagickFalse)
1474  {
1475  clone_info=DestroyDrawInfo(clone_info);
1476  return(MagickFalse);
1477  }
1478  start.x=(double) (bounds.x1-mid);
1479  start.y=(double) (bounds.y1-mid);
1480  end.x=(double) (bounds.x2+mid);
1481  end.y=(double) (bounds.y2+mid);
1482  primitive_info[0].primitive=RectanglePrimitive;
1483  status&=TraceRectangle(primitive_info,start,end);
1484  primitive_info[0].method=ReplaceMethod;
1485  coordinates=(ssize_t) primitive_info[0].coordinates;
1486  primitive_info[coordinates].primitive=UndefinedPrimitive;
1487  status=DrawPrimitive(image,clone_info,primitive_info);
1488  clone_info=DestroyDrawInfo(clone_info);
1489  return(status == 0 ? MagickFalse : MagickTrue);
1490 }
1491 ␌
1492 /*
1493 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1494 % %
1495 % %
1496 % %
1497 % D r a w C l i p P a t h %
1498 % %
1499 % %
1500 % %
1501 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1502 %
1503 % DrawClipPath() draws the clip path on the image mask.
1504 %
1505 % The format of the DrawClipPath method is:
1506 %
1507 % MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info,
1508 % const char *id)
1509 %
1510 % A description of each parameter follows:
1511 %
1512 % o image: the image.
1513 %
1514 % o draw_info: the draw info.
1515 %
1516 % o id: the clip path id.
1517 %
1518 */
1519 MagickExport MagickBooleanType DrawClipPath(Image *image,
1520  const DrawInfo *draw_info,const char *id)
1521 {
1522  const char
1523  *clip_path;
1524 
1525  Image
1526  *clipping_mask;
1527 
1528  MagickBooleanType
1529  status;
1530 
1531  clip_path=GetImageArtifact(image,id);
1532  if (clip_path == (const char *) NULL)
1533  return(MagickFalse);
1534  clipping_mask=DrawClippingMask(image,draw_info,draw_info->clip_mask,clip_path,
1535  &image->exception);
1536  if (clipping_mask == (Image *) NULL)
1537  return(MagickFalse);
1538  status=SetImageClipMask(image,clipping_mask);
1539  clipping_mask=DestroyImage(clipping_mask);
1540  return(status);
1541 }
1542 ␌
1543 /*
1544 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1545 % %
1546 % %
1547 % %
1548 % D r a w C l i p p i n g M a s k %
1549 % %
1550 % %
1551 % %
1552 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1553 %
1554 % DrawClippingMask() draws the clip path and returns it as an image clipping
1555 % mask.
1556 %
1557 % The format of the DrawClippingMask method is:
1558 %
1559 % Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
1560 % const char *id,const char *clip_path,ExceptionInfo *exception)
1561 %
1562 % A description of each parameter follows:
1563 %
1564 % o image: the image.
1565 %
1566 % o draw_info: the draw info.
1567 %
1568 % o id: the clip path id.
1569 %
1570 % o clip_path: the clip path.
1571 %
1572 % o exception: return any errors or warnings in this structure.
1573 %
1574 */
1575 static Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
1576  const char *id,const char *clip_path,ExceptionInfo *exception)
1577 {
1578  DrawInfo
1579  *clone_info;
1580 
1581  Image
1582  *clip_mask;
1583 
1584  MagickStatusType
1585  status;
1586 
1587  /*
1588  Draw a clip path.
1589  */
1590  assert(image != (Image *) NULL);
1591  assert(image->signature == MagickCoreSignature);
1592  assert(draw_info != (const DrawInfo *) NULL);
1593  if (IsEventLogging() != MagickFalse)
1594  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1595  clip_mask=AcquireImage((const ImageInfo *) NULL);
1596  status=SetImageExtent(clip_mask,image->columns,image->rows);
1597  if (status == MagickFalse)
1598  return(DestroyImage(clip_mask));
1599  status=SetImageClipMask(image,(Image *) NULL);
1600  status=QueryColorCompliance("#0000",AllCompliance,
1601  &clip_mask->background_color,exception);
1602  clip_mask->background_color.opacity=(Quantum) TransparentOpacity;
1603  status=SetImageBackgroundColor(clip_mask);
1604  if (draw_info->debug != MagickFalse)
1605  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin clip-path %s",
1606  id);
1607  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1608  (void) CloneString(&clone_info->primitive,clip_path);
1609  status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
1610  exception);
1611  if (clone_info->clip_mask != (char *) NULL)
1612  clone_info->clip_mask=DestroyString(clone_info->clip_mask);
1613  (void) QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
1614  exception);
1615  clone_info->stroke_width=0.0;
1616  clone_info->opacity=OpaqueOpacity;
1617  clone_info->clip_path=MagickTrue;
1618  status=RenderMVGContent(clip_mask,clone_info,0);
1619  clone_info=DestroyDrawInfo(clone_info);
1620  status&=SeparateImageChannel(clip_mask,TrueAlphaChannel);
1621  if (draw_info->compliance != SVGCompliance)
1622  status&=NegateImage(clip_mask,MagickFalse);
1623  if (status == MagickFalse)
1624  clip_mask=DestroyImage(clip_mask);
1625  if (draw_info->debug != MagickFalse)
1626  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end clip-path");
1627  return(clip_mask);
1628 }
1629 ␌
1630 /*
1631 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1632 % %
1633 % %
1634 % %
1635 % D r a w C o m p o s i t e M a s k %
1636 % %
1637 % %
1638 % %
1639 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1640 %
1641 % DrawCompositeMask() draws the mask path and returns it as an image mask.
1642 %
1643 % The format of the DrawCompositeMask method is:
1644 %
1645 % Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
1646 % const char *id,const char *mask_path,ExceptionInfo *exception)
1647 %
1648 % A description of each parameter follows:
1649 %
1650 % o image: the image.
1651 %
1652 % o draw_info: the draw info.
1653 %
1654 % o id: the mask path id.
1655 %
1656 % o mask_path: the mask path.
1657 %
1658 % o exception: return any errors or warnings in this structure.
1659 %
1660 */
1661 static Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
1662  const char *id,const char *mask_path,ExceptionInfo *exception)
1663 {
1664  Image
1665  *composite_mask;
1666 
1667  DrawInfo
1668  *clone_info;
1669 
1670  MagickStatusType
1671  status;
1672 
1673  /*
1674  Draw a mask path.
1675  */
1676  assert(image != (Image *) NULL);
1677  assert(image->signature == MagickCoreSignature);
1678  assert(draw_info != (const DrawInfo *) NULL);
1679  if (IsEventLogging() != MagickFalse)
1680  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1681  composite_mask=AcquireImage((const ImageInfo *) NULL);
1682  status=SetImageExtent(composite_mask,image->columns,image->rows);
1683  if (status == MagickFalse)
1684  return(DestroyImage(composite_mask));
1685  status=SetImageMask(image,(Image *) NULL);
1686  status=QueryColorCompliance("#0000",AllCompliance,
1687  &composite_mask->background_color,exception);
1688  composite_mask->background_color.opacity=(Quantum) TransparentOpacity;
1689  (void) SetImageBackgroundColor(composite_mask);
1690  if (draw_info->debug != MagickFalse)
1691  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin mask-path %s",
1692  id);
1693  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1694  (void) CloneString(&clone_info->primitive,mask_path);
1695  status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
1696  exception);
1697  status=QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
1698  exception);
1699  clone_info->stroke_width=0.0;
1700  clone_info->opacity=OpaqueOpacity;
1701  status=RenderMVGContent(composite_mask,clone_info,0);
1702  clone_info=DestroyDrawInfo(clone_info);
1703  status&=SeparateImageChannel(composite_mask,TrueAlphaChannel);
1704  status&=NegateImage(composite_mask,MagickFalse);
1705  if (status == MagickFalse)
1706  composite_mask=DestroyImage(composite_mask);
1707  if (draw_info->debug != MagickFalse)
1708  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end mask-path");
1709  return(composite_mask);
1710 }
1711 ␌
1712 /*
1713 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1714 % %
1715 % %
1716 % %
1717 + D r a w D a s h P o l y g o n %
1718 % %
1719 % %
1720 % %
1721 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1722 %
1723 % DrawDashPolygon() draws a dashed polygon (line, rectangle, ellipse) on the
1724 % image while respecting the dash offset and dash pattern attributes.
1725 %
1726 % The format of the DrawDashPolygon method is:
1727 %
1728 % MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1729 % const PrimitiveInfo *primitive_info,Image *image)
1730 %
1731 % A description of each parameter follows:
1732 %
1733 % o draw_info: the draw info.
1734 %
1735 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
1736 %
1737 % o image: the image.
1738 %
1739 %
1740 */
1741 static MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1742  const PrimitiveInfo *primitive_info,Image *image)
1743 {
1744  double
1745  dx,
1746  dy,
1747  length,
1748  maximum_length,
1749  offset,
1750  scale,
1751  total_length;
1752 
1753  DrawInfo
1754  *clone_info;
1755 
1756  MagickStatusType
1757  status;
1758 
1760  *dash_polygon;
1761 
1762  ssize_t
1763  i;
1764 
1765  size_t
1766  number_vertices;
1767 
1768  ssize_t
1769  j,
1770  n;
1771 
1772  assert(draw_info != (const DrawInfo *) NULL);
1773  if (draw_info->debug != MagickFalse)
1774  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-dash");
1775  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
1776  number_vertices=(size_t) i;
1777  dash_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
1778  (2UL*number_vertices+32UL),sizeof(*dash_polygon));
1779  if (dash_polygon == (PrimitiveInfo *) NULL)
1780  {
1781  (void) ThrowMagickException(&image->exception,GetMagickModule(),
1782  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
1783  return(MagickFalse);
1784  }
1785  (void) memset(dash_polygon,0,(2UL*number_vertices+32UL)*
1786  sizeof(*dash_polygon));
1787  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1788  clone_info->miterlimit=0;
1789  dash_polygon[0]=primitive_info[0];
1790  scale=ExpandAffine(&draw_info->affine);
1791  length=scale*draw_info->dash_pattern[0];
1792  offset=fabs(draw_info->dash_offset) >= MagickEpsilon ?
1793  scale*draw_info->dash_offset : 0.0;
1794  j=1;
1795  for (n=0; offset > 0.0; j=0)
1796  {
1797  if (draw_info->dash_pattern[n] <= 0.0)
1798  break;
1799  length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1800  if (offset > length)
1801  {
1802  offset-=length;
1803  n++;
1804  length=scale*draw_info->dash_pattern[n];
1805  continue;
1806  }
1807  if (offset < length)
1808  {
1809  length-=offset;
1810  offset=0.0;
1811  break;
1812  }
1813  offset=0.0;
1814  n++;
1815  }
1816  status=MagickTrue;
1817  maximum_length=0.0;
1818  total_length=0.0;
1819  for (i=1; (i < (ssize_t) number_vertices) && (length >= 0.0); i++)
1820  {
1821  dx=primitive_info[i].point.x-primitive_info[i-1].point.x;
1822  dy=primitive_info[i].point.y-primitive_info[i-1].point.y;
1823  maximum_length=hypot(dx,dy);
1824  if (maximum_length > (double) (MaxBezierCoordinates >> 2))
1825  continue;
1826  if (fabs(length) < MagickEpsilon)
1827  {
1828  if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
1829  n++;
1830  if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
1831  n=0;
1832  length=scale*draw_info->dash_pattern[n];
1833  }
1834  for (total_length=0.0; (length >= 0.0) && (maximum_length >= (total_length+length)); )
1835  {
1836  total_length+=length;
1837  if ((n & 0x01) != 0)
1838  {
1839  dash_polygon[0]=primitive_info[0];
1840  dash_polygon[0].point.x=(double) (primitive_info[i-1].point.x+dx*
1841  total_length*PerceptibleReciprocal(maximum_length));
1842  dash_polygon[0].point.y=(double) (primitive_info[i-1].point.y+dy*
1843  total_length*PerceptibleReciprocal(maximum_length));
1844  j=1;
1845  }
1846  else
1847  {
1848  if ((j+1) > (ssize_t) number_vertices)
1849  break;
1850  dash_polygon[j]=primitive_info[i-1];
1851  dash_polygon[j].point.x=(double) (primitive_info[i-1].point.x+dx*
1852  total_length*PerceptibleReciprocal(maximum_length));
1853  dash_polygon[j].point.y=(double) (primitive_info[i-1].point.y+dy*
1854  total_length*PerceptibleReciprocal(maximum_length));
1855  dash_polygon[j].coordinates=1;
1856  j++;
1857  dash_polygon[0].coordinates=(size_t) j;
1858  dash_polygon[j].primitive=UndefinedPrimitive;
1859  status&=DrawStrokePolygon(image,clone_info,dash_polygon);
1860  if (status == MagickFalse)
1861  break;
1862  }
1863  if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
1864  n++;
1865  if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
1866  n=0;
1867  length=scale*draw_info->dash_pattern[n];
1868  }
1869  length-=(maximum_length-total_length);
1870  if ((n & 0x01) != 0)
1871  continue;
1872  dash_polygon[j]=primitive_info[i];
1873  dash_polygon[j].coordinates=1;
1874  j++;
1875  }
1876  if ((status != MagickFalse) && (total_length < maximum_length) &&
1877  ((n & 0x01) == 0) && (j > 1))
1878  {
1879  dash_polygon[j]=primitive_info[i-1];
1880  dash_polygon[j].point.x+=MagickEpsilon;
1881  dash_polygon[j].point.y+=MagickEpsilon;
1882  dash_polygon[j].coordinates=1;
1883  j++;
1884  dash_polygon[0].coordinates=(size_t) j;
1885  dash_polygon[j].primitive=UndefinedPrimitive;
1886  status&=DrawStrokePolygon(image,clone_info,dash_polygon);
1887  }
1888  dash_polygon=(PrimitiveInfo *) RelinquishMagickMemory(dash_polygon);
1889  clone_info=DestroyDrawInfo(clone_info);
1890  if (draw_info->debug != MagickFalse)
1891  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-dash");
1892  return(status != 0 ? MagickTrue : MagickFalse);
1893 }
1894 ␌
1895 /*
1896 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1897 % %
1898 % %
1899 % %
1900 % D r a w G r a d i e n t I m a g e %
1901 % %
1902 % %
1903 % %
1904 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1905 %
1906 % DrawGradientImage() draws a linear gradient on the image.
1907 %
1908 % The format of the DrawGradientImage method is:
1909 %
1910 % MagickBooleanType DrawGradientImage(Image *image,
1911 % const DrawInfo *draw_info)
1912 %
1913 % A description of each parameter follows:
1914 %
1915 % o image: the image.
1916 %
1917 % o draw_info: the draw info.
1918 %
1919 */
1920 
1921 static inline double GetStopColorOffset(const GradientInfo *gradient,
1922  const ssize_t x,const ssize_t y)
1923 {
1924  switch (gradient->type)
1925  {
1926  case UndefinedGradient:
1927  case LinearGradient:
1928  {
1929  double
1930  gamma,
1931  length,
1932  offset,
1933  scale;
1934 
1935  PointInfo
1936  p,
1937  q;
1938 
1939  const SegmentInfo
1940  *gradient_vector;
1941 
1942  gradient_vector=(&gradient->gradient_vector);
1943  p.x=gradient_vector->x2-gradient_vector->x1;
1944  p.y=gradient_vector->y2-gradient_vector->y1;
1945  q.x=(double) x-gradient_vector->x1;
1946  q.y=(double) y-gradient_vector->y1;
1947  length=sqrt(q.x*q.x+q.y*q.y);
1948  gamma=sqrt(p.x*p.x+p.y*p.y)*length;
1949  gamma=PerceptibleReciprocal(gamma);
1950  scale=p.x*q.x+p.y*q.y;
1951  offset=gamma*scale*length;
1952  return(offset);
1953  }
1954  case RadialGradient:
1955  {
1956  PointInfo
1957  v;
1958 
1959  if (gradient->spread == RepeatSpread)
1960  {
1961  v.x=(double) x-gradient->center.x;
1962  v.y=(double) y-gradient->center.y;
1963  return(sqrt(v.x*v.x+v.y*v.y));
1964  }
1965  v.x=(double) (((x-gradient->center.x)*cos(DegreesToRadians(
1966  gradient->angle)))+((y-gradient->center.y)*sin(DegreesToRadians(
1967  gradient->angle))))*PerceptibleReciprocal(gradient->radii.x);
1968  v.y=(double) (((x-gradient->center.x)*sin(DegreesToRadians(
1969  gradient->angle)))-((y-gradient->center.y)*cos(DegreesToRadians(
1970  gradient->angle))))*PerceptibleReciprocal(gradient->radii.y);
1971  return(sqrt(v.x*v.x+v.y*v.y));
1972  }
1973  }
1974  return(0.0);
1975 }
1976 
1977 MagickExport MagickBooleanType DrawGradientImage(Image *image,
1978  const DrawInfo *draw_info)
1979 {
1980  CacheView
1981  *image_view;
1982 
1983  const GradientInfo
1984  *gradient;
1985 
1986  const SegmentInfo
1987  *gradient_vector;
1988 
1989  double
1990  length;
1991 
1993  *exception;
1994 
1995  MagickBooleanType
1996  status;
1997 
1999  zero;
2000 
2001  PointInfo
2002  point;
2003 
2005  bounding_box;
2006 
2007  ssize_t
2008  height,
2009  y;
2010 
2011  /*
2012  Draw linear or radial gradient on image.
2013  */
2014  assert(image != (Image *) NULL);
2015  assert(image->signature == MagickCoreSignature);
2016  assert(draw_info != (const DrawInfo *) NULL);
2017  if (IsEventLogging() != MagickFalse)
2018  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2019  gradient=(&draw_info->gradient);
2020  gradient_vector=(&gradient->gradient_vector);
2021  point.x=gradient_vector->x2-gradient_vector->x1;
2022  point.y=gradient_vector->y2-gradient_vector->y1;
2023  length=sqrt(point.x*point.x+point.y*point.y);
2024  bounding_box=gradient->bounding_box;
2025  status=MagickTrue;
2026  exception=(&image->exception);
2027  GetMagickPixelPacket(image,&zero);
2028  image_view=AcquireAuthenticCacheView(image,exception);
2029  height=(size_t) (bounding_box.y+bounding_box.height);
2030 #if defined(MAGICKCORE_OPENMP_SUPPORT)
2031  #pragma omp parallel for schedule(static) shared(status) \
2032  magick_number_threads(image,image,height,1)
2033 #endif
2034  for (y=bounding_box.y; y < (ssize_t) height; y++)
2035  {
2036  double
2037  alpha,
2038  offset;
2039 
2041  composite,
2042  pixel;
2043 
2044  IndexPacket
2045  *magick_restrict indexes;
2046 
2047  PixelPacket
2048  *magick_restrict q;
2049 
2050  ssize_t
2051  i,
2052  j,
2053  width,
2054  x;
2055 
2056  if (status == MagickFalse)
2057  continue;
2058  q=GetCacheViewAuthenticPixels(image_view,bounding_box.x,y,(size_t)
2059  bounding_box.width,1,exception);
2060  if (q == (PixelPacket *) NULL)
2061  {
2062  status=MagickFalse;
2063  continue;
2064  }
2065  indexes=GetCacheViewAuthenticIndexQueue(image_view);
2066  pixel=zero;
2067  composite=zero;
2068  offset=GetStopColorOffset(gradient,0,y);
2069  if (gradient->type != RadialGradient)
2070  offset*=PerceptibleReciprocal(length);
2071  width=(size_t) (bounding_box.x+bounding_box.width);
2072  for (x=bounding_box.x; x < (ssize_t) width; x++)
2073  {
2074  SetMagickPixelPacket(image,q,indexes+x,&pixel);
2075  switch (gradient->spread)
2076  {
2077  case UndefinedSpread:
2078  case PadSpread:
2079  {
2080  if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2081  (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2082  {
2083  offset=GetStopColorOffset(gradient,x,y);
2084  if (gradient->type != RadialGradient)
2085  offset*=PerceptibleReciprocal(length);
2086  }
2087  for (i=0; i < (ssize_t) gradient->number_stops; i++)
2088  if (offset < gradient->stops[i].offset)
2089  break;
2090  if ((offset < 0.0) || (i == 0))
2091  composite=gradient->stops[0].color;
2092  else
2093  if ((offset > 1.0) || (i == (ssize_t) gradient->number_stops))
2094  composite=gradient->stops[gradient->number_stops-1].color;
2095  else
2096  {
2097  j=i;
2098  i--;
2099  alpha=(offset-gradient->stops[i].offset)/
2100  (gradient->stops[j].offset-gradient->stops[i].offset);
2101  MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2102  &gradient->stops[j].color,alpha,&composite);
2103  }
2104  break;
2105  }
2106  case ReflectSpread:
2107  {
2108  if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2109  (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2110  {
2111  offset=GetStopColorOffset(gradient,x,y);
2112  if (gradient->type != RadialGradient)
2113  offset*=PerceptibleReciprocal(length);
2114  }
2115  if (offset < 0.0)
2116  offset=(-offset);
2117  if ((ssize_t) fmod(offset,2.0) == 0)
2118  offset=fmod(offset,1.0);
2119  else
2120  offset=1.0-fmod(offset,1.0);
2121  for (i=0; i < (ssize_t) gradient->number_stops; i++)
2122  if (offset < gradient->stops[i].offset)
2123  break;
2124  if (i == 0)
2125  composite=gradient->stops[0].color;
2126  else
2127  if (i == (ssize_t) gradient->number_stops)
2128  composite=gradient->stops[gradient->number_stops-1].color;
2129  else
2130  {
2131  j=i;
2132  i--;
2133  alpha=(offset-gradient->stops[i].offset)/
2134  (gradient->stops[j].offset-gradient->stops[i].offset);
2135  MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2136  &gradient->stops[j].color,alpha,&composite);
2137  }
2138  break;
2139  }
2140  case RepeatSpread:
2141  {
2142  double
2143  repeat;
2144 
2145  MagickBooleanType
2146  antialias;
2147 
2148  antialias=MagickFalse;
2149  repeat=0.0;
2150  if ((x != CastDoubleToLong(ceil(gradient_vector->x1-0.5))) ||
2151  (y != CastDoubleToLong(ceil(gradient_vector->y1-0.5))))
2152  {
2153  offset=GetStopColorOffset(gradient,x,y);
2154  if (gradient->type == LinearGradient)
2155  {
2156  repeat=fmod(offset,length);
2157  if (repeat < 0.0)
2158  repeat=length-fmod(-repeat,length);
2159  else
2160  repeat=fmod(offset,length);
2161  antialias=(repeat < length) && ((repeat+1.0) > length) ?
2162  MagickTrue : MagickFalse;
2163  offset=PerceptibleReciprocal(length)*repeat;
2164  }
2165  else
2166  {
2167  repeat=fmod(offset,(double) gradient->radius);
2168  if (repeat < 0.0)
2169  repeat=gradient->radius-fmod(-repeat,
2170  (double) gradient->radius);
2171  else
2172  repeat=fmod(offset,(double) gradient->radius);
2173  antialias=repeat+1.0 > gradient->radius ? MagickTrue :
2174  MagickFalse;
2175  offset=repeat*PerceptibleReciprocal(gradient->radius);
2176  }
2177  }
2178  for (i=0; i < (ssize_t) gradient->number_stops; i++)
2179  if (offset < gradient->stops[i].offset)
2180  break;
2181  if (i == 0)
2182  composite=gradient->stops[0].color;
2183  else
2184  if (i == (ssize_t) gradient->number_stops)
2185  composite=gradient->stops[gradient->number_stops-1].color;
2186  else
2187  {
2188  j=i;
2189  i--;
2190  alpha=(offset-gradient->stops[i].offset)/
2191  (gradient->stops[j].offset-gradient->stops[i].offset);
2192  if (antialias != MagickFalse)
2193  {
2194  if (gradient->type == LinearGradient)
2195  alpha=length-repeat;
2196  else
2197  alpha=gradient->radius-repeat;
2198  i=0;
2199  j=(ssize_t) gradient->number_stops-1L;
2200  }
2201  MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
2202  &gradient->stops[j].color,alpha,&composite);
2203  }
2204  break;
2205  }
2206  }
2207  MagickPixelCompositeOver(&composite,composite.opacity,&pixel,
2208  pixel.opacity,&pixel);
2209  SetPixelPacket(image,&pixel,q,indexes+x);
2210  q++;
2211  }
2212  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
2213  status=MagickFalse;
2214  }
2215  image_view=DestroyCacheView(image_view);
2216  return(status);
2217 }
2218 ␌
2219 /*
2220 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2221 % %
2222 % %
2223 % %
2224 % D r a w I m a g e %
2225 % %
2226 % %
2227 % %
2228 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2229 %
2230 % DrawImage() draws a graphic primitive on your image. The primitive
2231 % may be represented as a string or filename. Precede the filename with an
2232 % "at" sign (@) and the contents of the file are drawn on the image. You
2233 % can affect how text is drawn by setting one or more members of the draw
2234 % info structure.
2235 %
2236 % The format of the DrawImage method is:
2237 %
2238 % MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
2239 %
2240 % A description of each parameter follows:
2241 %
2242 % o image: the image.
2243 %
2244 % o draw_info: the draw info.
2245 %
2246 */
2247 
2248 static MagickBooleanType CheckPrimitiveExtent(MVGInfo *mvg_info,
2249  const double pad)
2250 {
2251  char
2252  **text = (char **) NULL;
2253 
2254  double
2255  extent;
2256 
2257  size_t
2258  quantum;
2259 
2260  ssize_t
2261  i;
2262 
2263  /*
2264  Check if there is enough storage for drawing primitives.
2265  */
2266  quantum=sizeof(**mvg_info->primitive_info);
2267  extent=(double) mvg_info->offset+pad+(PrimitiveExtentPad+1)*quantum;
2268  if (extent <= (double) *mvg_info->extent)
2269  return(MagickTrue);
2270  if ((extent >= (double) MAGICK_SSIZE_MAX) || (IsNaN(extent) != 0))
2271  return(MagickFalse);
2272  if (mvg_info->offset > 0)
2273  {
2274  text=(char **) AcquireQuantumMemory(mvg_info->offset,sizeof(*text));
2275  if (text == (char **) NULL)
2276  return(MagickFalse);
2277  for (i=0; i < mvg_info->offset; i++)
2278  text[i]=(*mvg_info->primitive_info)[i].text;
2279  }
2280  *mvg_info->primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(
2281  *mvg_info->primitive_info,(size_t) (extent+1),quantum);
2282  if (*mvg_info->primitive_info != (PrimitiveInfo *) NULL)
2283  {
2284  if (text != (char **) NULL)
2285  text=(char **) RelinquishMagickMemory(text);
2286  *mvg_info->extent=(size_t) extent;
2287  for (i=mvg_info->offset+1; i <= (ssize_t) extent; i++)
2288  {
2289  (*mvg_info->primitive_info)[i].primitive=UndefinedPrimitive;
2290  (*mvg_info->primitive_info)[i].text=(char *) NULL;
2291  }
2292  return(MagickTrue);
2293  }
2294  /*
2295  Reallocation failed, allocate a primitive to facilitate unwinding.
2296  */
2297  if (text != (char **) NULL)
2298  {
2299  for (i=0; i < mvg_info->offset; i++)
2300  if (text[i] != (char *) NULL)
2301  text[i]=DestroyString(text[i]);
2302  text=(char **) RelinquishMagickMemory(text);
2303  }
2304  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
2305  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
2306  *mvg_info->primitive_info=(PrimitiveInfo *) AcquireCriticalMemory((size_t)
2307  (PrimitiveExtentPad+1)*quantum);
2308  (void) memset(*mvg_info->primitive_info,0,(size_t) ((PrimitiveExtentPad+1)*
2309  quantum));
2310  *mvg_info->extent=1;
2311  mvg_info->offset=0;
2312  return(MagickFalse);
2313 }
2314 
2315 static inline double GetDrawValue(const char *magick_restrict string,
2316  char **magick_restrict sentinel)
2317 {
2318  char
2319  **magick_restrict q;
2320 
2321  double
2322  value;
2323 
2324  q=sentinel;
2325  value=InterpretLocaleValue(string,q);
2326  sentinel=q;
2327  return(value);
2328 }
2329 
2330 static int MVGMacroCompare(const void *target,const void *source)
2331 {
2332  const char
2333  *p,
2334  *q;
2335 
2336  p=(const char *) target;
2337  q=(const char *) source;
2338  return(strcmp(p,q));
2339 }
2340 
2341 static SplayTreeInfo *GetMVGMacros(const char *primitive)
2342 {
2343  char
2344  *macro,
2345  *token;
2346 
2347  const char
2348  *q;
2349 
2350  size_t
2351  extent;
2352 
2354  *macros;
2355 
2356  /*
2357  Scan graphic primitives for definitions and classes.
2358  */
2359  if (primitive == (const char *) NULL)
2360  return((SplayTreeInfo *) NULL);
2361  macros=NewSplayTree(MVGMacroCompare,RelinquishMagickMemory,
2362  RelinquishMagickMemory);
2363  macro=AcquireString(primitive);
2364  token=AcquireString(primitive);
2365  extent=strlen(token)+MagickPathExtent;
2366  for (q=primitive; *q != '\0'; )
2367  {
2368  if (GetNextToken(q,&q,extent,token) < 1)
2369  break;
2370  if (*token == '\0')
2371  break;
2372  if (LocaleCompare("push",token) == 0)
2373  {
2374  const char
2375  *end,
2376  *start;
2377 
2378  (void) GetNextToken(q,&q,extent,token);
2379  if (*q == '"')
2380  {
2381  char
2382  name[MagickPathExtent];
2383 
2384  const char
2385  *p;
2386 
2387  ssize_t
2388  n;
2389 
2390  /*
2391  Named macro (e.g. push graphic-context "wheel").
2392  */
2393  (void) GetNextToken(q,&q,extent,token);
2394  start=q;
2395  end=q;
2396  (void) CopyMagickString(name,token,MagickPathExtent);
2397  n=1;
2398  for (p=q; *p != '\0'; )
2399  {
2400  if (GetNextToken(p,&p,extent,token) < 1)
2401  break;
2402  if (*token == '\0')
2403  break;
2404  if (LocaleCompare(token,"pop") == 0)
2405  {
2406  end=p-strlen(token)-1;
2407  n--;
2408  }
2409  if (LocaleCompare(token,"push") == 0)
2410  n++;
2411  if ((n == 0) && (end > start))
2412  {
2413  /*
2414  Extract macro.
2415  */
2416  (void) GetNextToken(p,&p,extent,token);
2417  (void) CopyMagickString(macro,start,(size_t) (end-start));
2418  (void) AddValueToSplayTree(macros,ConstantString(name),
2419  ConstantString(macro));
2420  break;
2421  }
2422  }
2423  }
2424  }
2425  }
2426  token=DestroyString(token);
2427  macro=DestroyString(macro);
2428  return(macros);
2429 }
2430 
2431 static inline MagickBooleanType IsPoint(const char *point)
2432 {
2433  char
2434  *p;
2435 
2436  double
2437  value;
2438 
2439  value=GetDrawValue(point,&p);
2440  return((fabs(value) < MagickEpsilon) && (p == point) ? MagickFalse :
2441  MagickTrue);
2442 }
2443 
2444 static inline MagickBooleanType TracePoint(PrimitiveInfo *primitive_info,
2445  const PointInfo point)
2446 {
2447  primitive_info->coordinates=1;
2448  primitive_info->closed_subpath=MagickFalse;
2449  primitive_info->point=point;
2450  return(MagickTrue);
2451 }
2452 
2453 static MagickBooleanType RenderMVGContent(Image *image,
2454  const DrawInfo *draw_info,const size_t depth)
2455 {
2456 #define RenderImageTag "Render/Image"
2457 
2458  AffineMatrix
2459  affine,
2460  current;
2461 
2462  char
2463  key[2*MaxTextExtent],
2464  keyword[MaxTextExtent],
2465  geometry[MaxTextExtent],
2466  name[MaxTextExtent],
2467  *next_token,
2468  pattern[MaxTextExtent],
2469  *primitive,
2470  *token;
2471 
2472  const char
2473  *p,
2474  *q;
2475 
2476  double
2477  angle,
2478  coordinates,
2479  cursor,
2480  factor,
2481  primitive_extent;
2482 
2483  DrawInfo
2484  *clone_info,
2485  **graphic_context;
2486 
2487  MagickBooleanType
2488  proceed;
2489 
2490  MagickStatusType
2491  status;
2492 
2493  MVGInfo
2494  mvg_info;
2495 
2496  PointInfo
2497  point;
2498 
2499  PixelPacket
2500  start_color;
2501 
2503  *primitive_info;
2504 
2505  PrimitiveType
2506  primitive_type;
2507 
2508  SegmentInfo
2509  bounds;
2510 
2511  size_t
2512  extent,
2513  number_points;
2514 
2516  *macros;
2517 
2518  ssize_t
2519  defsDepth,
2520  i,
2521  j,
2522  k,
2523  n,
2524  symbolDepth,
2525  x;
2526 
2527  TypeMetric
2528  metrics;
2529 
2530  assert(image != (Image *) NULL);
2531  assert(image->signature == MagickCoreSignature);
2532  assert(draw_info != (DrawInfo *) NULL);
2533  assert(draw_info->signature == MagickCoreSignature);
2534  if (IsEventLogging() != MagickFalse)
2535  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2536  if (depth > MagickMaxRecursionDepth)
2537  ThrowBinaryImageException(DrawError,"VectorGraphicsNestedTooDeeply",
2538  image->filename);
2539  if ((draw_info->primitive == (char *) NULL) ||
2540  (*draw_info->primitive == '\0'))
2541  return(MagickFalse);
2542  if (draw_info->debug != MagickFalse)
2543  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"begin draw-image");
2544  if (SetImageStorageClass(image,DirectClass) == MagickFalse)
2545  return(MagickFalse);
2546  if (image->matte == MagickFalse)
2547  {
2548  status=SetImageAlphaChannel(image,OpaqueAlphaChannel);
2549  if (status == MagickFalse)
2550  return(MagickFalse);
2551  }
2552  primitive=(char *) NULL;
2553  if ((*draw_info->primitive == '@') && (strlen(draw_info->primitive) > 1) &&
2554  (*(draw_info->primitive+1) != '-') && (depth == 0))
2555  primitive=FileToString(draw_info->primitive,~0UL,&image->exception);
2556  else
2557  primitive=AcquireString(draw_info->primitive);
2558  if (primitive == (char *) NULL)
2559  return(MagickFalse);
2560  primitive_extent=(double) strlen(primitive);
2561  (void) SetImageArtifact(image,"mvg:vector-graphics",primitive);
2562  n=0;
2563  /*
2564  Allocate primitive info memory.
2565  */
2566  graphic_context=(DrawInfo **) AcquireMagickMemory(sizeof(*graphic_context));
2567  if (graphic_context == (DrawInfo **) NULL)
2568  {
2569  primitive=DestroyString(primitive);
2570  ThrowBinaryImageException(ResourceLimitError,"MemoryAllocationFailed",
2571  image->filename);
2572  }
2573  number_points=(size_t) PrimitiveExtentPad;
2574  primitive_info=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
2575  (number_points+1),sizeof(*primitive_info));
2576  if (primitive_info == (PrimitiveInfo *) NULL)
2577  {
2578  primitive=DestroyString(primitive);
2579  for ( ; n >= 0; n--)
2580  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
2581  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
2582  ThrowBinaryImageException(ResourceLimitError,"MemoryAllocationFailed",
2583  image->filename);
2584  }
2585  (void) memset(primitive_info,0,(size_t) (number_points+1)*
2586  sizeof(*primitive_info));
2587  (void) memset(&mvg_info,0,sizeof(mvg_info));
2588  mvg_info.primitive_info=(&primitive_info);
2589  mvg_info.extent=(&number_points);
2590  mvg_info.exception=(&image->exception);
2591  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,draw_info);
2592  graphic_context[n]->viewbox=image->page;
2593  if ((image->page.width == 0) || (image->page.height == 0))
2594  {
2595  graphic_context[n]->viewbox.width=image->columns;
2596  graphic_context[n]->viewbox.height=image->rows;
2597  }
2598  token=AcquireString(primitive);
2599  extent=strlen(token)+MaxTextExtent;
2600  cursor=0.0;
2601  defsDepth=0;
2602  symbolDepth=0;
2603  macros=GetMVGMacros(primitive);
2604  status=QueryColorDatabase("#000000",&start_color,&image->exception);
2605  for (q=primitive; *q != '\0'; )
2606  {
2607  /*
2608  Interpret graphic primitive.
2609  */
2610  if (GetNextToken(q,&q,MaxTextExtent,keyword) < 1)
2611  break;
2612  if (*keyword == '\0')
2613  break;
2614  if (*keyword == '#')
2615  {
2616  /*
2617  Comment.
2618  */
2619  while ((*q != '\n') && (*q != '\0'))
2620  q++;
2621  continue;
2622  }
2623  p=q-strlen(keyword)-1;
2624  primitive_type=UndefinedPrimitive;
2625  current=graphic_context[n]->affine;
2626  GetAffineMatrix(&affine);
2627  *token='\0';
2628  switch (*keyword)
2629  {
2630  case ';':
2631  break;
2632  case 'a':
2633  case 'A':
2634  {
2635  if (LocaleCompare("affine",keyword) == 0)
2636  {
2637  (void) GetNextToken(q,&q,extent,token);
2638  affine.sx=GetDrawValue(token,&next_token);
2639  if (token == next_token)
2640  ThrowPointExpectedException(image,token);
2641  (void) GetNextToken(q,&q,extent,token);
2642  if (*token == ',')
2643  (void) GetNextToken(q,&q,extent,token);
2644  affine.rx=GetDrawValue(token,&next_token);
2645  if (token == next_token)
2646  ThrowPointExpectedException(image,token);
2647  (void) GetNextToken(q,&q,extent,token);
2648  if (*token == ',')
2649  (void) GetNextToken(q,&q,extent,token);
2650  affine.ry=GetDrawValue(token,&next_token);
2651  if (token == next_token)
2652  ThrowPointExpectedException(image,token);
2653  (void) GetNextToken(q,&q,extent,token);
2654  if (*token == ',')
2655  (void) GetNextToken(q,&q,extent,token);
2656  affine.sy=GetDrawValue(token,&next_token);
2657  if (token == next_token)
2658  ThrowPointExpectedException(image,token);
2659  (void) GetNextToken(q,&q,extent,token);
2660  if (*token == ',')
2661  (void) GetNextToken(q,&q,extent,token);
2662  affine.tx=GetDrawValue(token,&next_token);
2663  if (token == next_token)
2664  ThrowPointExpectedException(image,token);
2665  (void) GetNextToken(q,&q,extent,token);
2666  if (*token == ',')
2667  (void) GetNextToken(q,&q,extent,token);
2668  affine.ty=GetDrawValue(token,&next_token);
2669  if (token == next_token)
2670  ThrowPointExpectedException(image,token);
2671  break;
2672  }
2673  if (LocaleCompare("arc",keyword) == 0)
2674  {
2675  primitive_type=ArcPrimitive;
2676  break;
2677  }
2678  status=MagickFalse;
2679  break;
2680  }
2681  case 'b':
2682  case 'B':
2683  {
2684  if (LocaleCompare("bezier",keyword) == 0)
2685  {
2686  primitive_type=BezierPrimitive;
2687  break;
2688  }
2689  if (LocaleCompare("border-color",keyword) == 0)
2690  {
2691  (void) GetNextToken(q,&q,extent,token);
2692  status&=QueryColorDatabase(token,&graphic_context[n]->border_color,
2693  &image->exception);
2694  break;
2695  }
2696  status=MagickFalse;
2697  break;
2698  }
2699  case 'c':
2700  case 'C':
2701  {
2702  if (LocaleCompare("class",keyword) == 0)
2703  {
2704  const char
2705  *mvg_class;
2706 
2707  (void) GetNextToken(q,&q,extent,token);
2708  if ((*token == '\0') || (*token == ';'))
2709  {
2710  status=MagickFalse;
2711  break;
2712  }
2713  /*
2714  Identify recursion.
2715  */
2716  for (i=0; i < n; i++)
2717  if (LocaleCompare(token,graphic_context[i]->id) == 0)
2718  break;
2719  if (i < n)
2720  break;
2721  mvg_class=(const char *) GetValueFromSplayTree(macros,token);
2722  if ((graphic_context[n]->render != MagickFalse) &&
2723  (mvg_class != (const char *) NULL) && (p > primitive))
2724  {
2725  char
2726  *elements;
2727 
2728  ssize_t
2729  offset;
2730 
2731  /*
2732  Inject class elements in stream.
2733  */
2734  offset=(ssize_t) (p-primitive);
2735  elements=AcquireString(primitive);
2736  elements[offset]='\0';
2737  (void) ConcatenateString(&elements,mvg_class);
2738  (void) ConcatenateString(&elements,"\n");
2739  (void) ConcatenateString(&elements,q);
2740  primitive=DestroyString(primitive);
2741  primitive=elements;
2742  q=primitive+offset;
2743  }
2744  break;
2745  }
2746  if (LocaleCompare("clip-path",keyword) == 0)
2747  {
2748  const char
2749  *clip_path;
2750 
2751  /*
2752  Take a node from within the MVG document, and duplicate it here.
2753  */
2754  (void) GetNextToken(q,&q,extent,token);
2755  if (*token == '\0')
2756  {
2757  status=MagickFalse;
2758  break;
2759  }
2760  (void) CloneString(&graphic_context[n]->clip_mask,token);
2761  clip_path=(const char *) GetValueFromSplayTree(macros,token);
2762  if (clip_path != (const char *) NULL)
2763  {
2764  if (graphic_context[n]->clipping_mask != (Image *) NULL)
2765  graphic_context[n]->clipping_mask=
2766  DestroyImage(graphic_context[n]->clipping_mask);
2767  graphic_context[n]->clipping_mask=DrawClippingMask(image,
2768  graphic_context[n],token,clip_path,&image->exception);
2769  if (graphic_context[n]->compliance != SVGCompliance)
2770  {
2771  const char
2772  *clip_path;
2773 
2774  clip_path=(const char *) GetValueFromSplayTree(macros,
2775  graphic_context[n]->clip_mask);
2776  if (clip_path != (const char *) NULL)
2777  (void) SetImageArtifact(image,
2778  graphic_context[n]->clip_mask,clip_path);
2779  status&=DrawClipPath(image,graphic_context[n],
2780  graphic_context[n]->clip_mask);
2781  }
2782  }
2783  break;
2784  }
2785  if (LocaleCompare("clip-rule",keyword) == 0)
2786  {
2787  ssize_t
2788  fill_rule;
2789 
2790  (void) GetNextToken(q,&q,extent,token);
2791  fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
2792  token);
2793  if (fill_rule == -1)
2794  {
2795  status=MagickFalse;
2796  break;
2797  }
2798  graphic_context[n]->fill_rule=(FillRule) fill_rule;
2799  break;
2800  }
2801  if (LocaleCompare("clip-units",keyword) == 0)
2802  {
2803  ssize_t
2804  clip_units;
2805 
2806  (void) GetNextToken(q,&q,extent,token);
2807  clip_units=ParseCommandOption(MagickClipPathOptions,MagickFalse,
2808  token);
2809  if (clip_units == -1)
2810  {
2811  status=MagickFalse;
2812  break;
2813  }
2814  graphic_context[n]->clip_units=(ClipPathUnits) clip_units;
2815  if (clip_units == ObjectBoundingBox)
2816  {
2817  GetAffineMatrix(&current);
2818  affine.sx=draw_info->bounds.x2;
2819  affine.sy=draw_info->bounds.y2;
2820  affine.tx=draw_info->bounds.x1;
2821  affine.ty=draw_info->bounds.y1;
2822  break;
2823  }
2824  break;
2825  }
2826  if (LocaleCompare("circle",keyword) == 0)
2827  {
2828  primitive_type=CirclePrimitive;
2829  break;
2830  }
2831  if (LocaleCompare("color",keyword) == 0)
2832  {
2833  primitive_type=ColorPrimitive;
2834  break;
2835  }
2836  if (LocaleCompare("compliance",keyword) == 0)
2837  {
2838  /*
2839  MVG compliance associates a clipping mask with an image; SVG
2840  compliance associates a clipping mask with a graphics context.
2841  */
2842  (void) GetNextToken(q,&q,extent,token);
2843  graphic_context[n]->compliance=(ComplianceType) ParseCommandOption(
2844  MagickComplianceOptions,MagickFalse,token);
2845  break;
2846  }
2847  if (LocaleCompare("currentColor",keyword) == 0)
2848  {
2849  (void) GetNextToken(q,&q,extent,token);
2850  break;
2851  }
2852  status=MagickFalse;
2853  break;
2854  }
2855  case 'd':
2856  case 'D':
2857  {
2858  if (LocaleCompare("decorate",keyword) == 0)
2859  {
2860  ssize_t
2861  decorate;
2862 
2863  (void) GetNextToken(q,&q,extent,token);
2864  decorate=ParseCommandOption(MagickDecorateOptions,MagickFalse,
2865  token);
2866  if (decorate == -1)
2867  {
2868  status=MagickFalse;
2869  break;
2870  }
2871  graphic_context[n]->decorate=(DecorationType) decorate;
2872  break;
2873  }
2874  if (LocaleCompare("density",keyword) == 0)
2875  {
2876  (void) GetNextToken(q,&q,extent,token);
2877  (void) CloneString(&graphic_context[n]->density,token);
2878  break;
2879  }
2880  if (LocaleCompare("direction",keyword) == 0)
2881  {
2882  ssize_t
2883  direction;
2884 
2885  (void) GetNextToken(q,&q,extent,token);
2886  direction=ParseCommandOption(MagickDirectionOptions,MagickFalse,
2887  token);
2888  if (direction == -1)
2889  status=MagickFalse;
2890  else
2891  graphic_context[n]->direction=(DirectionType) direction;
2892  break;
2893  }
2894  status=MagickFalse;
2895  break;
2896  }
2897  case 'e':
2898  case 'E':
2899  {
2900  if (LocaleCompare("ellipse",keyword) == 0)
2901  {
2902  primitive_type=EllipsePrimitive;
2903  break;
2904  }
2905  if (LocaleCompare("encoding",keyword) == 0)
2906  {
2907  (void) GetNextToken(q,&q,extent,token);
2908  (void) CloneString(&graphic_context[n]->encoding,token);
2909  break;
2910  }
2911  status=MagickFalse;
2912  break;
2913  }
2914  case 'f':
2915  case 'F':
2916  {
2917  if (LocaleCompare("fill",keyword) == 0)
2918  {
2919  const char
2920  *mvg_class;
2921 
2922  (void) GetNextToken(q,&q,extent,token);
2923  if (graphic_context[n]->clip_path != MagickFalse)
2924  break;
2925  mvg_class=(const char *) GetValueFromSplayTree(macros,token);
2926  if (mvg_class != (const char *) NULL)
2927  {
2928  (void) DrawPatternPath(image,draw_info,mvg_class,
2929  &graphic_context[n]->fill_pattern);
2930  break;
2931  }
2932  (void) FormatLocaleString(pattern,MaxTextExtent,"%s",token);
2933  if (GetImageArtifact(image,pattern) != (const char *) NULL)
2934  {
2935  (void) DrawPatternPath(image,draw_info,token,
2936  &graphic_context[n]->fill_pattern);
2937  break;
2938  }
2939  status&=QueryColorDatabase(token,&graphic_context[n]->fill,
2940  &image->exception);
2941  if (graphic_context[n]->fill_opacity != (double) OpaqueOpacity)
2942  graphic_context[n]->fill.opacity=ClampToQuantum(
2943  graphic_context[n]->fill_opacity);
2944  break;
2945  }
2946  if (LocaleCompare("fill-opacity",keyword) == 0)
2947  {
2948  double
2949  opacity;
2950 
2951  (void) GetNextToken(q,&q,extent,token);
2952  if (graphic_context[n]->clip_path != MagickFalse)
2953  break;
2954  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2955  opacity=MagickMin(MagickMax(factor*
2956  GetDrawValue(token,&next_token),0.0),1.0);
2957  if (token == next_token)
2958  ThrowPointExpectedException(image,token);
2959  if (graphic_context[n]->compliance == SVGCompliance)
2960  graphic_context[n]->fill_opacity*=(1.0-opacity);
2961  else
2962  graphic_context[n]->fill_opacity=((MagickRealType) QuantumRange-
2963  graphic_context[n]->fill_opacity)*(1.0-opacity);
2964  if (graphic_context[n]->fill.opacity != TransparentOpacity)
2965  graphic_context[n]->fill.opacity=(Quantum)
2966  graphic_context[n]->fill_opacity;
2967  else
2968  graphic_context[n]->fill.opacity=ClampToQuantum((MagickRealType)
2969  QuantumRange*(1.0-opacity));
2970  break;
2971  }
2972  if (LocaleCompare("fill-rule",keyword) == 0)
2973  {
2974  ssize_t
2975  fill_rule;
2976 
2977  (void) GetNextToken(q,&q,extent,token);
2978  fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
2979  token);
2980  if (fill_rule == -1)
2981  {
2982  status=MagickFalse;
2983  break;
2984  }
2985  graphic_context[n]->fill_rule=(FillRule) fill_rule;
2986  break;
2987  }
2988  if (LocaleCompare("font",keyword) == 0)
2989  {
2990  (void) GetNextToken(q,&q,extent,token);
2991  (void) CloneString(&graphic_context[n]->font,token);
2992  if (LocaleCompare("none",token) == 0)
2993  graphic_context[n]->font=(char *) RelinquishMagickMemory(
2994  graphic_context[n]->font);
2995  break;
2996  }
2997  if (LocaleCompare("font-family",keyword) == 0)
2998  {
2999  (void) GetNextToken(q,&q,extent,token);
3000  (void) CloneString(&graphic_context[n]->family,token);
3001  break;
3002  }
3003  if (LocaleCompare("font-size",keyword) == 0)
3004  {
3005  (void) GetNextToken(q,&q,extent,token);
3006  graphic_context[n]->pointsize=GetDrawValue(token,&next_token);
3007  if (token == next_token)
3008  ThrowPointExpectedException(image,token);
3009  break;
3010  }
3011  if (LocaleCompare("font-stretch",keyword) == 0)
3012  {
3013  ssize_t
3014  stretch;
3015 
3016  (void) GetNextToken(q,&q,extent,token);
3017  stretch=ParseCommandOption(MagickStretchOptions,MagickFalse,token);
3018  if (stretch == -1)
3019  {
3020  status=MagickFalse;
3021  break;
3022  }
3023  graphic_context[n]->stretch=(StretchType) stretch;
3024  break;
3025  }
3026  if (LocaleCompare("font-style",keyword) == 0)
3027  {
3028  ssize_t
3029  style;
3030 
3031  (void) GetNextToken(q,&q,extent,token);
3032  style=ParseCommandOption(MagickStyleOptions,MagickFalse,token);
3033  if (style == -1)
3034  {
3035  status=MagickFalse;
3036  break;
3037  }
3038  graphic_context[n]->style=(StyleType) style;
3039  break;
3040  }
3041  if (LocaleCompare("font-weight",keyword) == 0)
3042  {
3043  ssize_t
3044  weight;
3045 
3046  (void) GetNextToken(q,&q,extent,token);
3047  weight=ParseCommandOption(MagickWeightOptions,MagickFalse,token);
3048  if (weight == -1)
3049  weight=(ssize_t) StringToUnsignedLong(token);
3050  graphic_context[n]->weight=(size_t) weight;
3051  break;
3052  }
3053  status=MagickFalse;
3054  break;
3055  }
3056  case 'g':
3057  case 'G':
3058  {
3059  if (LocaleCompare("gradient-units",keyword) == 0)
3060  {
3061  (void) GetNextToken(q,&q,extent,token);
3062  break;
3063  }
3064  if (LocaleCompare("gravity",keyword) == 0)
3065  {
3066  ssize_t
3067  gravity;
3068 
3069  (void) GetNextToken(q,&q,extent,token);
3070  gravity=ParseCommandOption(MagickGravityOptions,MagickFalse,token);
3071  if (gravity == -1)
3072  {
3073  status=MagickFalse;
3074  break;
3075  }
3076  graphic_context[n]->gravity=(GravityType) gravity;
3077  break;
3078  }
3079  status=MagickFalse;
3080  break;
3081  }
3082  case 'i':
3083  case 'I':
3084  {
3085  if (LocaleCompare("image",keyword) == 0)
3086  {
3087  ssize_t
3088  compose;
3089 
3090  primitive_type=ImagePrimitive;
3091  (void) GetNextToken(q,&q,extent,token);
3092  compose=ParseCommandOption(MagickComposeOptions,MagickFalse,token);
3093  if (compose == -1)
3094  {
3095  status=MagickFalse;
3096  break;
3097  }
3098  graphic_context[n]->compose=(CompositeOperator) compose;
3099  break;
3100  }
3101  if (LocaleCompare("interline-spacing",keyword) == 0)
3102  {
3103  (void) GetNextToken(q,&q,extent,token);
3104  graphic_context[n]->interline_spacing=GetDrawValue(token,
3105  &next_token);
3106  if (token == next_token)
3107  ThrowPointExpectedException(image,token);
3108  break;
3109  }
3110  if (LocaleCompare("interword-spacing",keyword) == 0)
3111  {
3112  (void) GetNextToken(q,&q,extent,token);
3113  graphic_context[n]->interword_spacing=GetDrawValue(token,
3114  &next_token);
3115  if (token == next_token)
3116  ThrowPointExpectedException(image,token);
3117  break;
3118  }
3119  status=MagickFalse;
3120  break;
3121  }
3122  case 'k':
3123  case 'K':
3124  {
3125  if (LocaleCompare("kerning",keyword) == 0)
3126  {
3127  (void) GetNextToken(q,&q,extent,token);
3128  graphic_context[n]->kerning=GetDrawValue(token,&next_token);
3129  if (token == next_token)
3130  ThrowPointExpectedException(image,token);
3131  break;
3132  }
3133  status=MagickFalse;
3134  break;
3135  }
3136  case 'l':
3137  case 'L':
3138  {
3139  if (LocaleCompare("letter-spacing",keyword) == 0)
3140  {
3141  (void) GetNextToken(q,&q,extent,token);
3142  if (IsPoint(token) == MagickFalse)
3143  break;
3144  clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
3145  clone_info->text=AcquireString(" ");
3146  status&=GetTypeMetrics(image,clone_info,&metrics);
3147  graphic_context[n]->kerning=metrics.width*
3148  GetDrawValue(token,&next_token);
3149  clone_info=DestroyDrawInfo(clone_info);
3150  if (token == next_token)
3151  ThrowPointExpectedException(image,token);
3152  break;
3153  }
3154  if (LocaleCompare("line",keyword) == 0)
3155  {
3156  primitive_type=LinePrimitive;
3157  break;
3158  }
3159  status=MagickFalse;
3160  break;
3161  }
3162  case 'm':
3163  case 'M':
3164  {
3165  if (LocaleCompare("mask",keyword) == 0)
3166  {
3167  const char
3168  *mask_path;
3169 
3170  /*
3171  Take a node from within the MVG document, and duplicate it here.
3172  */
3173  (void) GetNextToken(q,&q,extent,token);
3174  mask_path=(const char *) GetValueFromSplayTree(macros,token);
3175  if (mask_path != (const char *) NULL)
3176  {
3177  if (graphic_context[n]->composite_mask != (Image *) NULL)
3178  graphic_context[n]->composite_mask=
3179  DestroyImage(graphic_context[n]->composite_mask);
3180  graphic_context[n]->composite_mask=DrawCompositeMask(image,
3181  graphic_context[n],token,mask_path,&image->exception);
3182  if (graphic_context[n]->compliance != SVGCompliance)
3183  status=SetImageMask(image,graphic_context[n]->composite_mask);
3184  }
3185  break;
3186  }
3187  if (LocaleCompare("matte",keyword) == 0)
3188  {
3189  primitive_type=MattePrimitive;
3190  break;
3191  }
3192  status=MagickFalse;
3193  break;
3194  }
3195  case 'o':
3196  case 'O':
3197  {
3198  if (LocaleCompare("offset",keyword) == 0)
3199  {
3200  (void) GetNextToken(q,&q,extent,token);
3201  break;
3202  }
3203  if (LocaleCompare("opacity",keyword) == 0)
3204  {
3205  double
3206  opacity;
3207 
3208  (void) GetNextToken(q,&q,extent,token);
3209  if (graphic_context[n]->clip_path != MagickFalse)
3210  break;
3211  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
3212  opacity=MagickMin(MagickMax(factor*
3213  GetDrawValue(token,&next_token),0.0),1.0);
3214  if (token == next_token)
3215  ThrowPointExpectedException(image,token);
3216  if (graphic_context[n]->compliance == SVGCompliance)
3217  {
3218  graphic_context[n]->fill_opacity*=(1.0-opacity);
3219  graphic_context[n]->stroke_opacity*=(1.0-opacity);
3220  }
3221  else
3222  {
3223  graphic_context[n]->fill_opacity=((MagickRealType) QuantumRange-
3224  graphic_context[n]->fill_opacity)*(1.0-opacity);
3225  graphic_context[n]->stroke_opacity=((MagickRealType)
3226  QuantumRange-graphic_context[n]->stroke_opacity)*
3227  (1.0-opacity);
3228  }
3229  break;
3230  }
3231  status=MagickFalse;
3232  break;
3233  }
3234  case 'p':
3235  case 'P':
3236  {
3237  if (LocaleCompare("path",keyword) == 0)
3238  {
3239  primitive_type=PathPrimitive;
3240  break;
3241  }
3242  if (LocaleCompare("point",keyword) == 0)
3243  {
3244  primitive_type=PointPrimitive;
3245  break;
3246  }
3247  if (LocaleCompare("polyline",keyword) == 0)
3248  {
3249  primitive_type=PolylinePrimitive;
3250  break;
3251  }
3252  if (LocaleCompare("polygon",keyword) == 0)
3253  {
3254  primitive_type=PolygonPrimitive;
3255  break;
3256  }
3257  if (LocaleCompare("pop",keyword) == 0)
3258  {
3259  if (GetNextToken(q,&q,extent,token) < 1)
3260  break;
3261  if (LocaleCompare("class",token) == 0)
3262  break;
3263  if (LocaleCompare("clip-path",token) == 0)
3264  break;
3265  if (LocaleCompare("defs",token) == 0)
3266  {
3267  defsDepth--;
3268  graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
3269  MagickTrue;
3270  break;
3271  }
3272  if (LocaleCompare("gradient",token) == 0)
3273  break;
3274  if (LocaleCompare("graphic-context",token) == 0)
3275  {
3276  if (n <= 0)
3277  {
3278  (void) ThrowMagickException(&image->exception,
3279  GetMagickModule(),DrawError,
3280  "UnbalancedGraphicContextPushPop","`%s'",token);
3281  status=MagickFalse;
3282  n=0;
3283  break;
3284  }
3285  if ((graphic_context[n]->clip_mask != (char *) NULL) &&
3286  (graphic_context[n]->compliance != SVGCompliance))
3287  if (LocaleCompare(graphic_context[n]->clip_mask,
3288  graphic_context[n-1]->clip_mask) != 0)
3289  status=SetImageClipMask(image,(Image *) NULL);
3290  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
3291  n--;
3292  break;
3293  }
3294  if (LocaleCompare("mask",token) == 0)
3295  break;
3296  if (LocaleCompare("pattern",token) == 0)
3297  break;
3298  if (LocaleCompare("symbol",token) == 0)
3299  {
3300  symbolDepth--;
3301  graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
3302  MagickTrue;
3303  break;
3304  }
3305  status=MagickFalse;
3306  break;
3307  }
3308  if (LocaleCompare("push",keyword) == 0)
3309  {
3310  if (GetNextToken(q,&q,extent,token) < 1)
3311  break;
3312  if (LocaleCompare("class",token) == 0)
3313  {
3314  /*
3315  Class context.
3316  */
3317  for (p=q; *q != '\0'; )
3318  {
3319  if (GetNextToken(q,&q,extent,token) < 1)
3320  break;
3321  if (LocaleCompare(token,"pop") != 0)
3322  continue;
3323  (void) GetNextToken(q,(const char **) NULL,extent,token);
3324  if (LocaleCompare(token,"class") != 0)
3325  continue;
3326  break;
3327  }
3328  (void) GetNextToken(q,&q,extent,token);
3329  break;
3330  }
3331  if (LocaleCompare("clip-path",token) == 0)
3332  {
3333  (void) GetNextToken(q,&q,extent,token);
3334  for (p=q; *q != '\0'; )
3335  {
3336  if (GetNextToken(q,&q,extent,token) < 1)
3337  break;
3338  if (LocaleCompare(token,"pop") != 0)
3339  continue;
3340  (void) GetNextToken(q,(const char **) NULL,extent,token);
3341  if (LocaleCompare(token,"clip-path") != 0)
3342  continue;
3343  break;
3344  }
3345  if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
3346  {
3347  status=MagickFalse;
3348  break;
3349  }
3350  (void) GetNextToken(q,&q,extent,token);
3351  break;
3352  }
3353  if (LocaleCompare("defs",token) == 0)
3354  {
3355  defsDepth++;
3356  graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
3357  MagickTrue;
3358  break;
3359  }
3360  if (LocaleCompare("gradient",token) == 0)
3361  {
3362  char
3363  key[2*MaxTextExtent],
3364  name[MaxTextExtent],
3365  type[MaxTextExtent];
3366 
3367  SegmentInfo
3368  segment;
3369 
3370  (void) GetNextToken(q,&q,extent,token);
3371  (void) CopyMagickString(name,token,MaxTextExtent);
3372  (void) GetNextToken(q,&q,extent,token);
3373  (void) CopyMagickString(type,token,MaxTextExtent);
3374  (void) GetNextToken(q,&q,extent,token);
3375  segment.x1=GetDrawValue(token,&next_token);
3376  if (token == next_token)
3377  ThrowPointExpectedException(image,token);
3378  (void) GetNextToken(q,&q,extent,token);
3379  if (*token == ',')
3380  (void) GetNextToken(q,&q,extent,token);
3381  segment.y1=GetDrawValue(token,&next_token);
3382  if (token == next_token)
3383  ThrowPointExpectedException(image,token);
3384  (void) GetNextToken(q,&q,extent,token);
3385  if (*token == ',')
3386  (void) GetNextToken(q,&q,extent,token);
3387  segment.x2=GetDrawValue(token,&next_token);
3388  if (token == next_token)
3389  ThrowPointExpectedException(image,token);
3390  (void) GetNextToken(q,&q,extent,token);
3391  if (*token == ',')
3392  (void) GetNextToken(q,&q,extent,token);
3393  segment.y2=GetDrawValue(token,&next_token);
3394  if (token == next_token)
3395  ThrowPointExpectedException(image,token);
3396  if (LocaleCompare(type,"radial") == 0)
3397  {
3398  (void) GetNextToken(q,&q,extent,token);
3399  if (*token == ',')
3400  (void) GetNextToken(q,&q,extent,token);
3401  }
3402  for (p=q; *q != '\0'; )
3403  {
3404  if (GetNextToken(q,&q,extent,token) < 1)
3405  break;
3406  if (LocaleCompare(token,"pop") != 0)
3407  continue;
3408  (void) GetNextToken(q,(const char **) NULL,extent,token);
3409  if (LocaleCompare(token,"gradient") != 0)
3410  continue;
3411  break;
3412  }
3413  if ((q == (char *) NULL) || (*q == '\0') ||
3414  (p == (char *) NULL) || ((q-4) < p))
3415  {
3416  status=MagickFalse;
3417  break;
3418  }
3419  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
3420  bounds.x1=graphic_context[n]->affine.sx*segment.x1+
3421  graphic_context[n]->affine.ry*segment.y1+
3422  graphic_context[n]->affine.tx;
3423  bounds.y1=graphic_context[n]->affine.rx*segment.x1+
3424  graphic_context[n]->affine.sy*segment.y1+
3425  graphic_context[n]->affine.ty;
3426  bounds.x2=graphic_context[n]->affine.sx*segment.x2+
3427  graphic_context[n]->affine.ry*segment.y2+
3428  graphic_context[n]->affine.tx;
3429  bounds.y2=graphic_context[n]->affine.rx*segment.x2+
3430  graphic_context[n]->affine.sy*segment.y2+
3431  graphic_context[n]->affine.ty;
3432  (void) FormatLocaleString(key,MaxTextExtent,"%s",name);
3433  (void) SetImageArtifact(image,key,token);
3434  (void) FormatLocaleString(key,MaxTextExtent,"%s-type",name);
3435  (void) SetImageArtifact(image,key,type);
3436  (void) FormatLocaleString(key,MaxTextExtent,"%s-geometry",name);
3437  (void) FormatLocaleString(geometry,MaxTextExtent,
3438  "%gx%g%+.15g%+.15g",
3439  MagickMax(fabs(bounds.x2-bounds.x1+1.0),1.0),
3440  MagickMax(fabs(bounds.y2-bounds.y1+1.0),1.0),
3441  bounds.x1,bounds.y1);
3442  (void) SetImageArtifact(image,key,geometry);
3443  (void) GetNextToken(q,&q,extent,token);
3444  break;
3445  }
3446  if (LocaleCompare("graphic-context",token) == 0)
3447  {
3448  n++;
3449  graphic_context=(DrawInfo **) ResizeQuantumMemory(
3450  graphic_context,(size_t) (n+1),sizeof(*graphic_context));
3451  if (graphic_context == (DrawInfo **) NULL)
3452  {
3453  (void) ThrowMagickException(&image->exception,
3454  GetMagickModule(),ResourceLimitError,
3455  "MemoryAllocationFailed","`%s'",image->filename);
3456  break;
3457  }
3458  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,
3459  graphic_context[n-1]);
3460  if (*q == '"')
3461  {
3462  (void) GetNextToken(q,&q,extent,token);
3463  (void) CloneString(&graphic_context[n]->id,token);
3464  }
3465  break;
3466  }
3467  if (LocaleCompare("mask",token) == 0)
3468  {
3469  (void) GetNextToken(q,&q,extent,token);
3470  break;
3471  }
3472  if (LocaleCompare("pattern",token) == 0)
3473  {
3475  bounds;
3476 
3477  (void) GetNextToken(q,&q,extent,token);
3478  (void) CopyMagickString(name,token,MaxTextExtent);
3479  (void) GetNextToken(q,&q,extent,token);
3480  bounds.x=CastDoubleToLong(ceil(GetDrawValue(token,
3481  &next_token)-0.5));
3482  if (token == next_token)
3483  ThrowPointExpectedException(image,token);
3484  (void) GetNextToken(q,&q,extent,token);
3485  if (*token == ',')
3486  (void) GetNextToken(q,&q,extent,token);
3487  bounds.y=CastDoubleToLong(ceil(GetDrawValue(token,
3488  &next_token)-0.5));
3489  if (token == next_token)
3490  ThrowPointExpectedException(image,token);
3491  (void) GetNextToken(q,&q,extent,token);
3492  if (*token == ',')
3493  (void) GetNextToken(q,&q,extent,token);
3494  bounds.width=CastDoubleToUnsigned(GetDrawValue(token,
3495  &next_token)+0.5);
3496  if (token == next_token)
3497  ThrowPointExpectedException(image,token);
3498  (void) GetNextToken(q,&q,extent,token);
3499  if (*token == ',')
3500  (void) GetNextToken(q,&q,extent,token);
3501  bounds.height=CastDoubleToUnsigned(GetDrawValue(token,
3502  &next_token)+0.5);
3503  if (token == next_token)
3504  ThrowPointExpectedException(image,token);
3505  for (p=q; *q != '\0'; )
3506  {
3507  if (GetNextToken(q,&q,extent,token) < 1)
3508  break;
3509  if (LocaleCompare(token,"pop") != 0)
3510  continue;
3511  (void) GetNextToken(q,(const char **) NULL,extent,token);
3512  if (LocaleCompare(token,"pattern") != 0)
3513  continue;
3514  break;
3515  }
3516  if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
3517  {
3518  status=MagickFalse;
3519  break;
3520  }
3521  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
3522  (void) FormatLocaleString(key,MaxTextExtent,"%s",name);
3523  (void) SetImageArtifact(image,key,token);
3524  (void) FormatLocaleString(key,MaxTextExtent,"%s-geometry",name);
3525  (void) FormatLocaleString(geometry,MaxTextExtent,
3526  "%.20gx%.20g%+.20g%+.20g",(double) bounds.width,(double)
3527  bounds.height,(double) bounds.x,(double) bounds.y);
3528  (void) SetImageArtifact(image,key,geometry);
3529  (void) GetNextToken(q,&q,extent,token);
3530  break;
3531  }
3532  if (LocaleCompare("symbol",token) == 0)
3533  {
3534  symbolDepth++;
3535  graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
3536  MagickTrue;
3537  break;
3538  }
3539  status=MagickFalse;
3540  break;
3541  }
3542  status=MagickFalse;
3543  break;
3544  }
3545  case 'r':
3546  case 'R':
3547  {
3548  if (LocaleCompare("rectangle",keyword) == 0)
3549  {
3550  primitive_type=RectanglePrimitive;
3551  break;
3552  }
3553  if (LocaleCompare("rotate",keyword) == 0)
3554  {
3555  (void) GetNextToken(q,&q,extent,token);
3556  angle=GetDrawValue(token,&next_token);
3557  if (token == next_token)
3558  ThrowPointExpectedException(image,token);
3559  affine.sx=cos(DegreesToRadians(fmod((double) angle,360.0)));
3560  affine.rx=sin(DegreesToRadians(fmod((double) angle,360.0)));
3561  affine.ry=(-sin(DegreesToRadians(fmod((double) angle,360.0))));
3562  affine.sy=cos(DegreesToRadians(fmod((double) angle,360.0)));
3563  break;
3564  }
3565  if (LocaleCompare("roundRectangle",keyword) == 0)
3566  {
3567  primitive_type=RoundRectanglePrimitive;
3568  break;
3569  }
3570  status=MagickFalse;
3571  break;
3572  }
3573  case 's':
3574  case 'S':
3575  {
3576  if (LocaleCompare("scale",keyword) == 0)
3577  {
3578  (void) GetNextToken(q,&q,extent,token);
3579  affine.sx=GetDrawValue(token,&next_token);
3580  if (token == next_token)
3581  ThrowPointExpectedException(image,token);
3582  (void) GetNextToken(q,&q,extent,token);
3583  if (*token == ',')
3584  (void) GetNextToken(q,&q,extent,token);
3585  affine.sy=GetDrawValue(token,&next_token);
3586  if (token == next_token)
3587  ThrowPointExpectedException(image,token);
3588  break;
3589  }
3590  if (LocaleCompare("skewX",keyword) == 0)
3591  {
3592  (void) GetNextToken(q,&q,extent,token);
3593  angle=GetDrawValue(token,&next_token);
3594  if (token == next_token)
3595  ThrowPointExpectedException(image,token);
3596  affine.ry=sin(DegreesToRadians(angle));
3597  break;
3598  }
3599  if (LocaleCompare("skewY",keyword) == 0)
3600  {
3601  (void) GetNextToken(q,&q,extent,token);
3602  angle=GetDrawValue(token,&next_token);
3603  if (token == next_token)
3604  ThrowPointExpectedException(image,token);
3605  affine.rx=(-tan(DegreesToRadians(angle)/2.0));
3606  break;
3607  }
3608  if (LocaleCompare("stop-color",keyword) == 0)
3609  {
3610  GradientType
3611  type;
3612 
3613  PixelPacket
3614  stop_color;
3615 
3616  (void) GetNextToken(q,&q,extent,token);
3617  status&=QueryColorDatabase(token,&stop_color,&image->exception);
3618  type=LinearGradient;
3619  if (draw_info->gradient.type == RadialGradient)
3620  type=RadialGradient;
3621  (void) GradientImage(image,type,PadSpread,&start_color,&stop_color);
3622  start_color=stop_color;
3623  (void) GetNextToken(q,&q,extent,token);
3624  break;
3625  }
3626  if (LocaleCompare("stroke",keyword) == 0)
3627  {
3628  const char
3629  *mvg_class;
3630 
3631  (void) GetNextToken(q,&q,extent,token);
3632  if (graphic_context[n]->clip_path != MagickFalse)
3633  break;
3634  mvg_class=(const char *) GetValueFromSplayTree(macros,token);
3635  if (mvg_class != (const char *) NULL)
3636  {
3637  (void) DrawPatternPath(image,draw_info,mvg_class,
3638  &graphic_context[n]->stroke_pattern);
3639  break;
3640  }
3641  (void) FormatLocaleString(pattern,MaxTextExtent,"%s",token);
3642  if (GetImageArtifact(image,pattern) != (const char *) NULL)
3643  {
3644  (void) DrawPatternPath(image,draw_info,token,
3645  &graphic_context[n]->stroke_pattern);
3646  break;
3647  }
3648  status&=QueryColorDatabase(token,&graphic_context[n]->stroke,
3649  &image->exception);
3650  if (graphic_context[n]->stroke_opacity != (MagickRealType) OpaqueOpacity)
3651  graphic_context[n]->stroke.opacity=ClampToQuantum(
3652  graphic_context[n]->stroke_opacity);
3653  break;
3654  }
3655  if (LocaleCompare("stroke-antialias",keyword) == 0)
3656  {
3657  (void) GetNextToken(q,&q,extent,token);
3658  graphic_context[n]->stroke_antialias=StringToLong(token) != 0 ?
3659  MagickTrue : MagickFalse;
3660  break;
3661  }
3662  if (LocaleCompare("stroke-dasharray",keyword) == 0)
3663  {
3664  if (graphic_context[n]->dash_pattern != (double *) NULL)
3665  graphic_context[n]->dash_pattern=(double *)
3666  RelinquishMagickMemory(graphic_context[n]->dash_pattern);
3667  if (IsPoint(q) != MagickFalse)
3668  {
3669  const char
3670  *p;
3671 
3672  p=q;
3673  (void) GetNextToken(p,&p,extent,token);
3674  if (*token == ',')
3675  (void) GetNextToken(p,&p,extent,token);
3676  for (x=0; IsPoint(token) != MagickFalse; x++)
3677  {
3678  (void) GetNextToken(p,&p,extent,token);
3679  if (*token == ',')
3680  (void) GetNextToken(p,&p,extent,token);
3681  }
3682  graphic_context[n]->dash_pattern=(double *)
3683  AcquireQuantumMemory((size_t) (2*x+2),
3684  sizeof(*graphic_context[n]->dash_pattern));
3685  if (graphic_context[n]->dash_pattern == (double *) NULL)
3686  {
3687  (void) ThrowMagickException(&image->exception,
3688  GetMagickModule(),ResourceLimitError,
3689  "MemoryAllocationFailed","`%s'",image->filename);
3690  status=MagickFalse;
3691  break;
3692  }
3693  (void) memset(graphic_context[n]->dash_pattern,0,(size_t)
3694  (2*x+2)*sizeof(*graphic_context[n]->dash_pattern));
3695  for (j=0; j < x; j++)
3696  {
3697  (void) GetNextToken(q,&q,extent,token);
3698  if (*token == ',')
3699  (void) GetNextToken(q,&q,extent,token);
3700  graphic_context[n]->dash_pattern[j]=GetDrawValue(token,
3701  &next_token);
3702  if (token == next_token)
3703  ThrowPointExpectedException(image,token);
3704  if (graphic_context[n]->dash_pattern[j] <= 0.0)
3705  status=MagickFalse;
3706  }
3707  if ((x & 0x01) != 0)
3708  for ( ; j < (2*x); j++)
3709  graphic_context[n]->dash_pattern[j]=
3710  graphic_context[n]->dash_pattern[j-x];
3711  graphic_context[n]->dash_pattern[j]=0.0;
3712  break;
3713  }
3714  (void) GetNextToken(q,&q,extent,token);
3715  break;
3716  }
3717  if (LocaleCompare("stroke-dashoffset",keyword) == 0)
3718  {
3719  (void) GetNextToken(q,&q,extent,token);
3720  graphic_context[n]->dash_offset=GetDrawValue(token,&next_token);
3721  if (token == next_token)
3722  ThrowPointExpectedException(image,token);
3723  break;
3724  }
3725  if (LocaleCompare("stroke-linecap",keyword) == 0)
3726  {
3727  ssize_t
3728  linecap;
3729 
3730  (void) GetNextToken(q,&q,extent,token);
3731  linecap=ParseCommandOption(MagickLineCapOptions,MagickFalse,token);
3732  if (linecap == -1)
3733  {
3734  status=MagickFalse;
3735  break;
3736  }
3737  graphic_context[n]->linecap=(LineCap) linecap;
3738  break;
3739  }
3740  if (LocaleCompare("stroke-linejoin",keyword) == 0)
3741  {
3742  ssize_t
3743  linejoin;
3744 
3745  (void) GetNextToken(q,&q,extent,token);
3746  linejoin=ParseCommandOption(MagickLineJoinOptions,MagickFalse,
3747  token);
3748  if (linejoin == -1)
3749  {
3750  status=MagickFalse;
3751  break;
3752  }
3753  graphic_context[n]->linejoin=(LineJoin) linejoin;
3754  break;
3755  }
3756  if (LocaleCompare("stroke-miterlimit",keyword) == 0)
3757  {
3758  (void) GetNextToken(q,&q,extent,token);
3759  graphic_context[n]->miterlimit=StringToUnsignedLong(token);
3760  break;
3761  }
3762  if (LocaleCompare("stroke-opacity",keyword) == 0)
3763  {
3764  double
3765  opacity;
3766 
3767  (void) GetNextToken(q,&q,extent,token);
3768  if (graphic_context[n]->clip_path != MagickFalse)
3769  break;
3770  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
3771  opacity=MagickMin(MagickMax(factor*
3772  GetDrawValue(token,&next_token),0.0),1.0);
3773  if (token == next_token)
3774  ThrowPointExpectedException(image,token);
3775  if (graphic_context[n]->compliance == SVGCompliance)
3776  graphic_context[n]->stroke_opacity*=(1.0-opacity);
3777  else
3778  graphic_context[n]->stroke_opacity=((MagickRealType) QuantumRange-
3779  graphic_context[n]->stroke_opacity)*(1.0-opacity);
3780  if (graphic_context[n]->stroke.opacity != TransparentOpacity)
3781  graphic_context[n]->stroke.opacity=(Quantum)
3782  graphic_context[n]->stroke_opacity;
3783  else
3784  graphic_context[n]->stroke.opacity=ClampToQuantum(
3785  (MagickRealType) QuantumRange*opacity);
3786  break;
3787  }
3788  if (LocaleCompare("stroke-width",keyword) == 0)
3789  {
3790  (void) GetNextToken(q,&q,extent,token);
3791  if (graphic_context[n]->clip_path != MagickFalse)
3792  break;
3793  graphic_context[n]->stroke_width=GetDrawValue(token,&next_token);
3794  if ((token == next_token) ||
3795  (graphic_context[n]->stroke_width < 0.0))
3796  ThrowPointExpectedException(image,token);
3797  break;
3798  }
3799  status=MagickFalse;
3800  break;
3801  }
3802  case 't':
3803  case 'T':
3804  {
3805  if (LocaleCompare("text",keyword) == 0)
3806  {
3807  primitive_type=TextPrimitive;
3808  cursor=0.0;
3809  break;
3810  }
3811  if (LocaleCompare("text-align",keyword) == 0)
3812  {
3813  ssize_t
3814  align;
3815 
3816  (void) GetNextToken(q,&q,extent,token);
3817  align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
3818  if (align == -1)
3819  {
3820  status=MagickFalse;
3821  break;
3822  }
3823  graphic_context[n]->align=(AlignType) align;
3824  break;
3825  }
3826  if (LocaleCompare("text-anchor",keyword) == 0)
3827  {
3828  ssize_t
3829  align;
3830 
3831  (void) GetNextToken(q,&q,extent,token);
3832  align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
3833  if (align == -1)
3834  {
3835  status=MagickFalse;
3836  break;
3837  }
3838  graphic_context[n]->align=(AlignType) align;
3839  break;
3840  }
3841  if (LocaleCompare("text-antialias",keyword) == 0)
3842  {
3843  (void) GetNextToken(q,&q,extent,token);
3844  graphic_context[n]->text_antialias=StringToLong(token) != 0 ?
3845  MagickTrue : MagickFalse;
3846  break;
3847  }
3848  if (LocaleCompare("text-undercolor",keyword) == 0)
3849  {
3850  (void) GetNextToken(q,&q,extent,token);
3851  status&=QueryColorDatabase(token,&graphic_context[n]->undercolor,
3852  &image->exception);
3853  break;
3854  }
3855  if (LocaleCompare("translate",keyword) == 0)
3856  {
3857  (void) GetNextToken(q,&q,extent,token);
3858  affine.tx=GetDrawValue(token,&next_token);
3859  if (token == next_token)
3860  ThrowPointExpectedException(image,token);
3861  (void) GetNextToken(q,&q,extent,token);
3862  if (*token == ',')
3863  (void) GetNextToken(q,&q,extent,token);
3864  affine.ty=GetDrawValue(token,&next_token);
3865  if (token == next_token)
3866  ThrowPointExpectedException(image,token);
3867  break;
3868  }
3869  status=MagickFalse;
3870  break;
3871  }
3872  case 'u':
3873  case 'U':
3874  {
3875  if (LocaleCompare("use",keyword) == 0)
3876  {
3877  const char
3878  *use;
3879 
3880  /*
3881  Get a macro from the MVG document, and "use" it here.
3882  */
3883  (void) GetNextToken(q,&q,extent,token);
3884  use=(const char *) GetValueFromSplayTree(macros,token);
3885  if (use != (const char *) NULL)
3886  {
3887  clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
3888  (void) CloneString(&clone_info->primitive,use);
3889  status=RenderMVGContent(image,clone_info,depth+1);
3890  clone_info=DestroyDrawInfo(clone_info);
3891  }
3892  break;
3893  }
3894  status=MagickFalse;
3895  break;
3896  }
3897  case 'v':
3898  case 'V':
3899  {
3900  if (LocaleCompare("viewbox",keyword) == 0)
3901  {
3902  (void) GetNextToken(q,&q,extent,token);
3903  graphic_context[n]->viewbox.x=CastDoubleToLong(ceil(
3904  GetDrawValue(token,&next_token)-0.5));
3905  if (token == next_token)
3906  ThrowPointExpectedException(image,token);
3907  (void) GetNextToken(q,&q,extent,token);
3908  if (*token == ',')
3909  (void) GetNextToken(q,&q,extent,token);
3910  graphic_context[n]->viewbox.y=CastDoubleToLong(ceil(
3911  GetDrawValue(token,&next_token)-0.5));
3912  if (token == next_token)
3913  ThrowPointExpectedException(image,token);
3914  (void) GetNextToken(q,&q,extent,token);
3915  if (*token == ',')
3916  (void) GetNextToken(q,&q,extent,token);
3917  graphic_context[n]->viewbox.width=CastDoubleToUnsigned(
3918  GetDrawValue(token,&next_token)+0.5);
3919  if (token == next_token)
3920  ThrowPointExpectedException(image,token);
3921  (void) GetNextToken(q,&q,extent,token);
3922  if (*token == ',')
3923  (void) GetNextToken(q,&q,extent,token);
3924  graphic_context[n]->viewbox.height=CastDoubleToUnsigned(
3925  GetDrawValue(token,&next_token)+0.5);
3926  if (token == next_token)
3927  ThrowPointExpectedException(image,token);
3928  break;
3929  }
3930  status=MagickFalse;
3931  break;
3932  }
3933  case 'w':
3934  case 'W':
3935  {
3936  if (LocaleCompare("word-spacing",keyword) == 0)
3937  {
3938  (void) GetNextToken(q,&q,extent,token);
3939  graphic_context[n]->interword_spacing=GetDrawValue(token,
3940  &next_token);
3941  if (token == next_token)
3942  ThrowPointExpectedException(image,token);
3943  break;
3944  }
3945  status=MagickFalse;
3946  break;
3947  }
3948  default:
3949  {
3950  status=MagickFalse;
3951  break;
3952  }
3953  }
3954  if (status == MagickFalse)
3955  break;
3956  if ((fabs(affine.sx-1.0) >= MagickEpsilon) ||
3957  (fabs(affine.rx) >= MagickEpsilon) || (fabs(affine.ry) >= MagickEpsilon) ||
3958  (fabs(affine.sy-1.0) >= MagickEpsilon) ||
3959  (fabs(affine.tx) >= MagickEpsilon) || (fabs(affine.ty) >= MagickEpsilon))
3960  {
3961  graphic_context[n]->affine.sx=current.sx*affine.sx+current.ry*affine.rx;
3962  graphic_context[n]->affine.rx=current.rx*affine.sx+current.sy*affine.rx;
3963  graphic_context[n]->affine.ry=current.sx*affine.ry+current.ry*affine.sy;
3964  graphic_context[n]->affine.sy=current.rx*affine.ry+current.sy*affine.sy;
3965  graphic_context[n]->affine.tx=current.sx*affine.tx+current.ry*affine.ty+
3966  current.tx;
3967  graphic_context[n]->affine.ty=current.rx*affine.tx+current.sy*affine.ty+
3968  current.ty;
3969  }
3970  if (primitive_type == UndefinedPrimitive)
3971  {
3972  if ((draw_info->debug != MagickFalse) && (q > p))
3973  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int)
3974  (q-p-1),p);
3975  continue;
3976  }
3977  /*
3978  Parse the primitive attributes.
3979  */
3980  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
3981  if (primitive_info[i].text != (char *) NULL)
3982  primitive_info[i].text=DestroyString(primitive_info[i].text);
3983  i=0;
3984  mvg_info.offset=i;
3985  j=0;
3986  primitive_info[0].point.x=0.0;
3987  primitive_info[0].point.y=0.0;
3988  primitive_info[0].coordinates=0;
3989  primitive_info[0].method=FloodfillMethod;
3990  primitive_info[0].closed_subpath=MagickFalse;
3991  for (x=0; *q != '\0'; x++)
3992  {
3993  /*
3994  Define points.
3995  */
3996  if (IsPoint(q) == MagickFalse)
3997  break;
3998  (void) GetNextToken(q,&q,extent,token);
3999  point.x=GetDrawValue(token,&next_token);
4000  if (token == next_token)
4001  ThrowPointExpectedException(image,token);
4002  (void) GetNextToken(q,&q,extent,token);
4003  if (*token == ',')
4004  (void) GetNextToken(q,&q,extent,token);
4005  point.y=GetDrawValue(token,&next_token);
4006  if (token == next_token)
4007  ThrowPointExpectedException(image,token);
4008  (void) GetNextToken(q,(const char **) NULL,extent,token);
4009  if (*token == ',')
4010  (void) GetNextToken(q,&q,extent,token);
4011  primitive_info[i].primitive=primitive_type;
4012  primitive_info[i].point=point;
4013  primitive_info[i].coordinates=0;
4014  primitive_info[i].method=FloodfillMethod;
4015  primitive_info[i].closed_subpath=MagickFalse;
4016  i++;
4017  mvg_info.offset=i;
4018  if (i < (ssize_t) number_points)
4019  continue;
4020  status&=CheckPrimitiveExtent(&mvg_info,(double) number_points);
4021  primitive_info=(*mvg_info.primitive_info);
4022  }
4023  if (status == MagickFalse)
4024  break;
4025  if (primitive_info[j].text != (char *) NULL)
4026  primitive_info[j].text=DestroyString(primitive_info[j].text);
4027  primitive_info[j].primitive=primitive_type;
4028  primitive_info[j].coordinates=(size_t) x;
4029  primitive_info[j].method=FloodfillMethod;
4030  primitive_info[j].closed_subpath=MagickFalse;
4031  /*
4032  Circumscribe primitive within a circle.
4033  */
4034  bounds.x1=primitive_info[j].point.x;
4035  bounds.y1=primitive_info[j].point.y;
4036  bounds.x2=primitive_info[j].point.x;
4037  bounds.y2=primitive_info[j].point.y;
4038  for (k=1; k < (ssize_t) primitive_info[j].coordinates; k++)
4039  {
4040  point=primitive_info[j+k].point;
4041  if (point.x < bounds.x1)
4042  bounds.x1=point.x;
4043  if (point.y < bounds.y1)
4044  bounds.y1=point.y;
4045  if (point.x > bounds.x2)
4046  bounds.x2=point.x;
4047  if (point.y > bounds.y2)
4048  bounds.y2=point.y;
4049  }
4050  /*
4051  Speculate how many points our primitive might consume.
4052  */
4053  coordinates=(double) primitive_info[j].coordinates;
4054  switch (primitive_type)
4055  {
4056  case RectanglePrimitive:
4057  {
4058  coordinates*=5.0;
4059  break;
4060  }
4061  case RoundRectanglePrimitive:
4062  {
4063  double
4064  alpha,
4065  beta,
4066  radius;
4067 
4068  alpha=bounds.x2-bounds.x1;
4069  beta=bounds.y2-bounds.y1;
4070  radius=hypot(alpha,beta);
4071  coordinates*=5.0;
4072  coordinates+=2.0*((size_t) ceil((double) MagickPI*radius))+6.0*
4073  BezierQuantum+360.0;
4074  break;
4075  }
4076  case BezierPrimitive:
4077  {
4078  coordinates=(BezierQuantum*(double) primitive_info[j].coordinates);
4079  break;
4080  }
4081  case PathPrimitive:
4082  {
4083  char
4084  *s,
4085  *t;
4086 
4087  (void) GetNextToken(q,&q,extent,token);
4088  coordinates=1.0;
4089  t=token;
4090  for (s=token; *s != '\0'; s=t)
4091  {
4092  double
4093  value;
4094 
4095  value=GetDrawValue(s,&t);
4096  (void) value;
4097  if (s == t)
4098  {
4099  t++;
4100  continue;
4101  }
4102  coordinates++;
4103  }
4104  for (s=token; *s != '\0'; s++)
4105  if (strspn(s,"AaCcQqSsTt") != 0)
4106  coordinates+=(20.0*BezierQuantum)+360.0;
4107  break;
4108  }
4109  default:
4110  break;
4111  }
4112  if (status == MagickFalse)
4113  break;
4114  if (((size_t) (i+coordinates)) >= number_points)
4115  {
4116  /*
4117  Resize based on speculative points required by primitive.
4118  */
4119  number_points+=coordinates+1;
4120  if (number_points < (size_t) coordinates)
4121  {
4122  (void) ThrowMagickException(&image->exception,GetMagickModule(),
4123  ResourceLimitError,"MemoryAllocationFailed","`%s'",
4124  image->filename);
4125  break;
4126  }
4127  mvg_info.offset=i;
4128  status&=CheckPrimitiveExtent(&mvg_info,(double) number_points);
4129  primitive_info=(*mvg_info.primitive_info);
4130  }
4131  status&=CheckPrimitiveExtent(&mvg_info,PrimitiveExtentPad);
4132  primitive_info=(*mvg_info.primitive_info);
4133  if (status == MagickFalse)
4134  break;
4135  mvg_info.offset=j;
4136  switch (primitive_type)
4137  {
4138  case PointPrimitive:
4139  default:
4140  {
4141  if (primitive_info[j].coordinates != 1)
4142  {
4143  status=MagickFalse;
4144  break;
4145  }
4146  status&=TracePoint(primitive_info+j,primitive_info[j].point);
4147  primitive_info=(*mvg_info.primitive_info);
4148  i=(ssize_t) (j+primitive_info[j].coordinates);
4149  break;
4150  }
4151  case LinePrimitive:
4152  {
4153  if (primitive_info[j].coordinates != 2)
4154  {
4155  status=MagickFalse;
4156  break;
4157  }
4158  status&=TraceLine(primitive_info+j,primitive_info[j].point,
4159  primitive_info[j+1].point);
4160  primitive_info=(*mvg_info.primitive_info);
4161  i=(ssize_t) (j+primitive_info[j].coordinates);
4162  break;
4163  }
4164  case RectanglePrimitive:
4165  {
4166  if (primitive_info[j].coordinates != 2)
4167  {
4168  status=MagickFalse;
4169  break;
4170  }
4171  status&=TraceRectangle(primitive_info+j,primitive_info[j].point,
4172  primitive_info[j+1].point);
4173  primitive_info=(*mvg_info.primitive_info);
4174  i=(ssize_t) (j+primitive_info[j].coordinates);
4175  break;
4176  }
4177  case RoundRectanglePrimitive:
4178  {
4179  if (primitive_info[j].coordinates != 3)
4180  {
4181  status=MagickFalse;
4182  break;
4183  }
4184  if ((primitive_info[j+2].point.x < 0.0) ||
4185  (primitive_info[j+2].point.y < 0.0))
4186  {
4187  status=MagickFalse;
4188  break;
4189  }
4190  if ((primitive_info[j+1].point.x-primitive_info[j].point.x) < 0.0)
4191  {
4192  status=MagickFalse;
4193  break;
4194  }
4195  if ((primitive_info[j+1].point.y-primitive_info[j].point.y) < 0.0)
4196  {
4197  status=MagickFalse;
4198  break;
4199  }
4200  status&=TraceRoundRectangle(&mvg_info,primitive_info[j].point,
4201  primitive_info[j+1].point,primitive_info[j+2].point);
4202  primitive_info=(*mvg_info.primitive_info);
4203  i=(ssize_t) (j+primitive_info[j].coordinates);
4204  break;
4205  }
4206  case ArcPrimitive:
4207  {
4208  if (primitive_info[j].coordinates != 3)
4209  {
4210  status=MagickFalse;
4211  break;
4212  }
4213  status&=TraceArc(&mvg_info,primitive_info[j].point,
4214  primitive_info[j+1].point,primitive_info[j+2].point);
4215  primitive_info=(*mvg_info.primitive_info);
4216  i=(ssize_t) (j+primitive_info[j].coordinates);
4217  break;
4218  }
4219  case EllipsePrimitive:
4220  {
4221  if (primitive_info[j].coordinates != 3)
4222  {
4223  status=MagickFalse;
4224  break;
4225  }
4226  if ((primitive_info[j+1].point.x < 0.0) ||
4227  (primitive_info[j+1].point.y < 0.0))
4228  {
4229  status=MagickFalse;
4230  break;
4231  }
4232  status&=TraceEllipse(&mvg_info,primitive_info[j].point,
4233  primitive_info[j+1].point,primitive_info[j+2].point);
4234  primitive_info=(*mvg_info.primitive_info);
4235  i=(ssize_t) (j+primitive_info[j].coordinates);
4236  break;
4237  }
4238  case CirclePrimitive:
4239  {
4240  if (primitive_info[j].coordinates != 2)
4241  {
4242  status=MagickFalse;
4243  break;
4244  }
4245  status&=TraceCircle(&mvg_info,primitive_info[j].point,
4246  primitive_info[j+1].point);
4247  primitive_info=(*mvg_info.primitive_info);
4248  i=(ssize_t) (j+primitive_info[j].coordinates);
4249  break;
4250  }
4251  case PolylinePrimitive:
4252  {
4253  if (primitive_info[j].coordinates < 1)
4254  {
4255  status=MagickFalse;
4256  break;
4257  }
4258  break;
4259  }
4260  case PolygonPrimitive:
4261  {
4262  if (primitive_info[j].coordinates < 3)
4263  {
4264  status=MagickFalse;
4265  break;
4266  }
4267  primitive_info[i]=primitive_info[j];
4268  primitive_info[i].coordinates=0;
4269  primitive_info[j].coordinates++;
4270  primitive_info[j].closed_subpath=MagickTrue;
4271  i++;
4272  break;
4273  }
4274  case BezierPrimitive:
4275  {
4276  if (primitive_info[j].coordinates < 3)
4277  {
4278  status=MagickFalse;
4279  break;
4280  }
4281  status&=TraceBezier(&mvg_info,primitive_info[j].coordinates);
4282  primitive_info=(*mvg_info.primitive_info);
4283  i=(ssize_t) (j+primitive_info[j].coordinates);
4284  break;
4285  }
4286  case PathPrimitive:
4287  {
4288  coordinates=(double) TracePath(image,&mvg_info,token);
4289  primitive_info=(*mvg_info.primitive_info);
4290  if (coordinates < 0.0)
4291  {
4292  status=MagickFalse;
4293  break;
4294  }
4295  i=(ssize_t) (j+coordinates);
4296  break;
4297  }
4298  case ColorPrimitive:
4299  case MattePrimitive:
4300  {
4301  ssize_t
4302  method;
4303 
4304  if (primitive_info[j].coordinates != 1)
4305  {
4306  status=MagickFalse;
4307  break;
4308  }
4309  (void) GetNextToken(q,&q,extent,token);
4310  method=ParseCommandOption(MagickMethodOptions,MagickFalse,token);
4311  if (method == -1)
4312  {
4313  status=MagickFalse;
4314  break;
4315  }
4316  primitive_info[j].method=(PaintMethod) method;
4317  break;
4318  }
4319  case TextPrimitive:
4320  {
4321  char
4322  geometry[MagickPathExtent];
4323 
4324  if (primitive_info[j].coordinates != 1)
4325  {
4326  status=MagickFalse;
4327  break;
4328  }
4329  if (*token != ',')
4330  (void) GetNextToken(q,&q,extent,token);
4331  (void) CloneString(&primitive_info[j].text,token);
4332  /*
4333  Compute text cursor offset.
4334  */
4335  clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
4336  if ((fabs(mvg_info.point.x-primitive_info->point.x) < MagickEpsilon) &&
4337  (fabs(mvg_info.point.y-primitive_info->point.y) < MagickEpsilon))
4338  {
4339  mvg_info.point=primitive_info->point;
4340  primitive_info->point.x+=cursor;
4341  }
4342  else
4343  {
4344  mvg_info.point=primitive_info->point;
4345  cursor=0.0;
4346  }
4347  (void) FormatLocaleString(geometry,MagickPathExtent,"%+f%+f",
4348  primitive_info->point.x,primitive_info->point.y);
4349  clone_info->render=MagickFalse;
4350  clone_info->text=AcquireString(token);
4351  status&=GetTypeMetrics(image,clone_info,&metrics);
4352  clone_info=DestroyDrawInfo(clone_info);
4353  cursor+=metrics.width;
4354  if (graphic_context[n]->compliance != SVGCompliance)
4355  cursor=0.0;
4356  break;
4357  }
4358  case ImagePrimitive:
4359  {
4360  if (primitive_info[j].coordinates != 2)
4361  {
4362  status=MagickFalse;
4363  break;
4364  }
4365  (void) GetNextToken(q,&q,extent,token);
4366  (void) CloneString(&primitive_info[j].text,token);
4367  break;
4368  }
4369  }
4370  mvg_info.offset=i;
4371  if (status == 0)
4372  break;
4373  primitive_info[i].primitive=UndefinedPrimitive;
4374  if ((draw_info->debug != MagickFalse) && (q > p))
4375  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int) (q-p),p);
4376  /*
4377  Sanity check.
4378  */
4379  status&=CheckPrimitiveExtent(&mvg_info,ExpandAffine(
4380  &graphic_context[n]->affine));
4381  primitive_info=(*mvg_info.primitive_info);
4382  if (status == 0)
4383  break;
4384  status&=CheckPrimitiveExtent(&mvg_info,(double)
4385  graphic_context[n]->stroke_width);
4386  primitive_info=(*mvg_info.primitive_info);
4387  if (status == 0)
4388  break;
4389  if (i == 0)
4390  continue;
4391  /*
4392  Transform points.
4393  */
4394  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4395  {
4396  point=primitive_info[i].point;
4397  primitive_info[i].point.x=graphic_context[n]->affine.sx*point.x+
4398  graphic_context[n]->affine.ry*point.y+graphic_context[n]->affine.tx;
4399  primitive_info[i].point.y=graphic_context[n]->affine.rx*point.x+
4400  graphic_context[n]->affine.sy*point.y+graphic_context[n]->affine.ty;
4401  point=primitive_info[i].point;
4402  if (point.x < graphic_context[n]->bounds.x1)
4403  graphic_context[n]->bounds.x1=point.x;
4404  if (point.y < graphic_context[n]->bounds.y1)
4405  graphic_context[n]->bounds.y1=point.y;
4406  if (point.x > graphic_context[n]->bounds.x2)
4407  graphic_context[n]->bounds.x2=point.x;
4408  if (point.y > graphic_context[n]->bounds.y2)
4409  graphic_context[n]->bounds.y2=point.y;
4410  if (primitive_info[i].primitive == ImagePrimitive)
4411  break;
4412  if (i >= (ssize_t) number_points)
4413  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
4414  }
4415  if (graphic_context[n]->render != MagickFalse)
4416  {
4417  if ((n != 0) && (graphic_context[n]->compliance != SVGCompliance) &&
4418  (graphic_context[n]->clip_mask != (char *) NULL) &&
4419  (LocaleCompare(graphic_context[n]->clip_mask,
4420  graphic_context[n-1]->clip_mask) != 0))
4421  {
4422  const char
4423  *clip_path;
4424 
4425  clip_path=(const char *) GetValueFromSplayTree(macros,
4426  graphic_context[n]->clip_mask);
4427  if (clip_path != (const char *) NULL)
4428  (void) SetImageArtifact(image,graphic_context[n]->clip_mask,
4429  clip_path);
4430  status&=DrawClipPath(image,graphic_context[n],
4431  graphic_context[n]->clip_mask);
4432  }
4433  status&=DrawPrimitive(image,graphic_context[n],primitive_info);
4434  }
4435  proceed=SetImageProgress(image,RenderImageTag,q-primitive,(MagickSizeType)
4436  primitive_extent);
4437  if (proceed == MagickFalse)
4438  break;
4439  if (status == 0)
4440  break;
4441  }
4442  if (draw_info->debug != MagickFalse)
4443  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end draw-image");
4444  /*
4445  Relinquish resources.
4446  */
4447  macros=DestroySplayTree(macros);
4448  token=DestroyString(token);
4449  if (primitive_info != (PrimitiveInfo *) NULL)
4450  {
4451  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4452  if (primitive_info[i].text != (char *) NULL)
4453  primitive_info[i].text=DestroyString(primitive_info[i].text);
4454  primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(primitive_info);
4455  }
4456  primitive=DestroyString(primitive);
4457  for ( ; n >= 0; n--)
4458  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
4459  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
4460  if (status == MagickFalse)
4461  ThrowBinaryImageException(DrawError,
4462  "NonconformingDrawingPrimitiveDefinition",keyword);
4463  return(status != 0 ? MagickTrue : MagickFalse);
4464 }
4465 
4466 MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
4467 {
4468  return(RenderMVGContent(image,draw_info,0));
4469 }
4470 ␌
4471 /*
4472 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4473 % %
4474 % %
4475 % %
4476 % D r a w P a t t e r n P a t h %
4477 % %
4478 % %
4479 % %
4480 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4481 %
4482 % DrawPatternPath() draws a pattern.
4483 %
4484 % The format of the DrawPatternPath method is:
4485 %
4486 % MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
4487 % const char *name,Image **pattern)
4488 %
4489 % A description of each parameter follows:
4490 %
4491 % o image: the image.
4492 %
4493 % o draw_info: the draw info.
4494 %
4495 % o name: the pattern name.
4496 %
4497 % o image: the image.
4498 %
4499 */
4500 MagickExport MagickBooleanType DrawPatternPath(Image *image,
4501  const DrawInfo *draw_info,const char *name,Image **pattern)
4502 {
4503  char
4504  property[MaxTextExtent];
4505 
4506  const char
4507  *geometry,
4508  *path,
4509  *type;
4510 
4511  DrawInfo
4512  *clone_info;
4513 
4514  ImageInfo
4515  *image_info;
4516 
4517  MagickBooleanType
4518  status;
4519 
4520  assert(image != (Image *) NULL);
4521  assert(image->signature == MagickCoreSignature);
4522  assert(draw_info != (const DrawInfo *) NULL);
4523  if (IsEventLogging() != MagickFalse)
4524  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4525  assert(name != (const char *) NULL);
4526  (void) FormatLocaleString(property,MaxTextExtent,"%s",name);
4527  path=GetImageArtifact(image,property);
4528  if (path == (const char *) NULL)
4529  return(MagickFalse);
4530  (void) FormatLocaleString(property,MaxTextExtent,"%s-geometry",name);
4531  geometry=GetImageArtifact(image,property);
4532  if (geometry == (const char *) NULL)
4533  return(MagickFalse);
4534  if ((*pattern) != (Image *) NULL)
4535  *pattern=DestroyImage(*pattern);
4536  image_info=AcquireImageInfo();
4537  image_info->size=AcquireString(geometry);
4538  *pattern=AcquireImage(image_info);
4539  image_info=DestroyImageInfo(image_info);
4540  (void) QueryColorDatabase("#00000000",&(*pattern)->background_color,
4541  &image->exception);
4542  (void) SetImageBackgroundColor(*pattern);
4543  if (draw_info->debug != MagickFalse)
4544  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4545  "begin pattern-path %s %s",name,geometry);
4546  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4547  if (clone_info->fill_pattern != (Image *) NULL)
4548  clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
4549  if (clone_info->stroke_pattern != (Image *) NULL)
4550  clone_info->stroke_pattern=DestroyImage(clone_info->stroke_pattern);
4551  (void) FormatLocaleString(property,MaxTextExtent,"%s-type",name);
4552  type=GetImageArtifact(image,property);
4553  if (type != (const char *) NULL)
4554  clone_info->gradient.type=(GradientType) ParseCommandOption(
4555  MagickGradientOptions,MagickFalse,type);
4556  (void) CloneString(&clone_info->primitive,path);
4557  status=RenderMVGContent(*pattern,clone_info,0);
4558  clone_info=DestroyDrawInfo(clone_info);
4559  if (draw_info->debug != MagickFalse)
4560  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end pattern-path");
4561  return(status);
4562 }
4563 ␌
4564 /*
4565 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4566 % %
4567 % %
4568 % %
4569 + D r a w P o l y g o n P r i m i t i v e %
4570 % %
4571 % %
4572 % %
4573 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4574 %
4575 % DrawPolygonPrimitive() draws a polygon on the image.
4576 %
4577 % The format of the DrawPolygonPrimitive method is:
4578 %
4579 % MagickBooleanType DrawPolygonPrimitive(Image *image,
4580 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4581 %
4582 % A description of each parameter follows:
4583 %
4584 % o image: the image.
4585 %
4586 % o draw_info: the draw info.
4587 %
4588 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4589 %
4590 */
4591 
4592 static PolygonInfo **DestroyPolygonTLS(PolygonInfo **polygon_info)
4593 {
4594  ssize_t
4595  i;
4596 
4597  assert(polygon_info != (PolygonInfo **) NULL);
4598  for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
4599  if (polygon_info[i] != (PolygonInfo *) NULL)
4600  polygon_info[i]=DestroyPolygonInfo(polygon_info[i]);
4601  polygon_info=(PolygonInfo **) RelinquishMagickMemory(polygon_info);
4602  return(polygon_info);
4603 }
4604 
4605 static PolygonInfo **AcquirePolygonTLS(const DrawInfo *draw_info,
4606  const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
4607 {
4608  PathInfo
4609  *magick_restrict path_info;
4610 
4611  PolygonInfo
4612  **polygon_info;
4613 
4614  size_t
4615  number_threads;
4616 
4617  number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
4618  polygon_info=(PolygonInfo **) AcquireQuantumMemory(number_threads,
4619  sizeof(*polygon_info));
4620  if (polygon_info == (PolygonInfo **) NULL)
4621  {
4622  (void) ThrowMagickException(exception,GetMagickModule(),
4623  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4624  return((PolygonInfo **) NULL);
4625  }
4626  (void) memset(polygon_info,0,number_threads*sizeof(*polygon_info));
4627  path_info=ConvertPrimitiveToPath(draw_info,primitive_info,exception);
4628  if (path_info == (PathInfo *) NULL)
4629  return(DestroyPolygonTLS(polygon_info));
4630  polygon_info[0]=ConvertPathToPolygon(path_info,exception);
4631  if (polygon_info[0] == (PolygonInfo *) NULL)
4632  {
4633  (void) ThrowMagickException(exception,GetMagickModule(),
4634  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4635  return(DestroyPolygonTLS(polygon_info));
4636  }
4637  path_info=(PathInfo *) RelinquishMagickMemory(path_info);
4638  return(polygon_info);
4639 }
4640 
4641 static MagickBooleanType AcquirePolygonEdgesTLS(PolygonInfo **polygon_info,
4642  const size_t number_threads,ExceptionInfo *exception)
4643 {
4644  ssize_t
4645  i;
4646 
4647  for (i=1; i < (ssize_t) number_threads; i++)
4648  {
4649  EdgeInfo
4650  *edge_info;
4651 
4652  ssize_t
4653  j;
4654 
4655  polygon_info[i]=(PolygonInfo *) AcquireMagickMemory(
4656  sizeof(*polygon_info[i]));
4657  if (polygon_info[i] == (PolygonInfo *) NULL)
4658  {
4659  (void) ThrowMagickException(exception,GetMagickModule(),
4660  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4661  return(MagickFalse);
4662  }
4663  polygon_info[i]->number_edges=0;
4664  edge_info=polygon_info[0]->edges;
4665  polygon_info[i]->edges=(EdgeInfo *) AcquireQuantumMemory(
4666  polygon_info[0]->number_edges,sizeof(*edge_info));
4667  if (polygon_info[i]->edges == (EdgeInfo *) NULL)
4668  {
4669  (void) ThrowMagickException(exception,GetMagickModule(),
4670  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4671  return(MagickFalse);
4672  }
4673  (void) memcpy(polygon_info[i]->edges,edge_info,
4674  polygon_info[0]->number_edges*sizeof(*edge_info));
4675  for (j=0; j < (ssize_t) polygon_info[i]->number_edges; j++)
4676  polygon_info[i]->edges[j].points=(PointInfo *) NULL;
4677  polygon_info[i]->number_edges=polygon_info[0]->number_edges;
4678  for (j=0; j < (ssize_t) polygon_info[i]->number_edges; j++)
4679  {
4680  edge_info=polygon_info[0]->edges+j;
4681  polygon_info[i]->edges[j].points=(PointInfo *) AcquireQuantumMemory(
4682  edge_info->number_points,sizeof(*edge_info));
4683  if (polygon_info[i]->edges[j].points == (PointInfo *) NULL)
4684  {
4685  (void) ThrowMagickException(exception,GetMagickModule(),
4686  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
4687  return(MagickFalse);
4688  }
4689  (void) memcpy(polygon_info[i]->edges[j].points,edge_info->points,
4690  edge_info->number_points*sizeof(*edge_info->points));
4691  }
4692  }
4693  return(MagickTrue);
4694 }
4695 
4696 static size_t DestroyEdge(PolygonInfo *polygon_info,const ssize_t edge)
4697 {
4698  assert(edge < (ssize_t) polygon_info->number_edges);
4699  polygon_info->edges[edge].points=(PointInfo *) RelinquishMagickMemory(
4700  polygon_info->edges[edge].points);
4701  polygon_info->number_edges--;
4702  if (edge < (ssize_t) polygon_info->number_edges)
4703  (void) memmove(polygon_info->edges+edge,polygon_info->edges+edge+1,
4704  (size_t) (polygon_info->number_edges-edge)*sizeof(*polygon_info->edges));
4705  return(polygon_info->number_edges);
4706 }
4707 
4708 static double GetOpacityPixel(PolygonInfo *polygon_info,const double mid,
4709  const MagickBooleanType fill,const FillRule fill_rule,const ssize_t x,
4710  const ssize_t y,double *stroke_opacity)
4711 {
4712  double
4713  alpha,
4714  beta,
4715  distance,
4716  subpath_opacity;
4717 
4718  PointInfo
4719  delta;
4720 
4721  EdgeInfo
4722  *p;
4723 
4724  const PointInfo
4725  *q;
4726 
4727  ssize_t
4728  i;
4729 
4730  ssize_t
4731  j,
4732  winding_number;
4733 
4734  /*
4735  Compute fill & stroke opacity for this (x,y) point.
4736  */
4737  *stroke_opacity=0.0;
4738  subpath_opacity=0.0;
4739  p=polygon_info->edges;
4740  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
4741  {
4742  if ((double) y <= (p->bounds.y1-mid-0.5))
4743  break;
4744  if ((double) y > (p->bounds.y2+mid+0.5))
4745  {
4746  p--;
4747  (void) DestroyEdge(polygon_info,j--);
4748  continue;
4749  }
4750  if (((double) x <= (p->bounds.x1-mid-0.5)) ||
4751  ((double) x > (p->bounds.x2+mid+0.5)))
4752  continue;
4753  i=(ssize_t) MagickMax((double) p->highwater,1.0);
4754  for ( ; i < (ssize_t) p->number_points; i++)
4755  {
4756  if ((double) y <= (p->points[i-1].y-mid-0.5))
4757  break;
4758  if ((double) y > (p->points[i].y+mid+0.5))
4759  continue;
4760  if (p->scanline != (double) y)
4761  {
4762  p->scanline=(double) y;
4763  p->highwater=(size_t) i;
4764  }
4765  /*
4766  Compute distance between a point and an edge.
4767  */
4768  q=p->points+i-1;
4769  delta.x=(q+1)->x-q->x;
4770  delta.y=(q+1)->y-q->y;
4771  beta=delta.x*(x-q->x)+delta.y*(y-q->y);
4772  if (beta <= 0.0)
4773  {
4774  delta.x=(double) x-q->x;
4775  delta.y=(double) y-q->y;
4776  distance=delta.x*delta.x+delta.y*delta.y;
4777  }
4778  else
4779  {
4780  alpha=delta.x*delta.x+delta.y*delta.y;
4781  if (beta >= alpha)
4782  {
4783  delta.x=(double) x-(q+1)->x;
4784  delta.y=(double) y-(q+1)->y;
4785  distance=delta.x*delta.x+delta.y*delta.y;
4786  }
4787  else
4788  {
4789  alpha=PerceptibleReciprocal(alpha);
4790  beta=delta.x*(y-q->y)-delta.y*(x-q->x);
4791  distance=alpha*beta*beta;
4792  }
4793  }
4794  /*
4795  Compute stroke & subpath opacity.
4796  */
4797  beta=0.0;
4798  if (p->ghostline == MagickFalse)
4799  {
4800  alpha=mid+0.5;
4801  if ((*stroke_opacity < 1.0) &&
4802  (distance <= ((alpha+0.25)*(alpha+0.25))))
4803  {
4804  alpha=mid-0.5;
4805  if (distance <= ((alpha+0.25)*(alpha+0.25)))
4806  *stroke_opacity=1.0;
4807  else
4808  {
4809  beta=1.0;
4810  if (fabs(distance-1.0) >= MagickEpsilon)
4811  beta=sqrt((double) distance);
4812  alpha=beta-mid-0.5;
4813  if (*stroke_opacity < ((alpha-0.25)*(alpha-0.25)))
4814  *stroke_opacity=(alpha-0.25)*(alpha-0.25);
4815  }
4816  }
4817  }
4818  if ((fill == MagickFalse) || (distance > 1.0) || (subpath_opacity >= 1.0))
4819  continue;
4820  if (distance <= 0.0)
4821  {
4822  subpath_opacity=1.0;
4823  continue;
4824  }
4825  if (distance > 1.0)
4826  continue;
4827  if (fabs(beta) < MagickEpsilon)
4828  {
4829  beta=1.0;
4830  if (fabs(distance-1.0) >= MagickEpsilon)
4831  beta=sqrt(distance);
4832  }
4833  alpha=beta-1.0;
4834  if (subpath_opacity < (alpha*alpha))
4835  subpath_opacity=alpha*alpha;
4836  }
4837  }
4838  /*
4839  Compute fill opacity.
4840  */
4841  if (fill == MagickFalse)
4842  return(0.0);
4843  if (subpath_opacity >= 1.0)
4844  return(1.0);
4845  /*
4846  Determine winding number.
4847  */
4848  winding_number=0;
4849  p=polygon_info->edges;
4850  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
4851  {
4852  if ((double) y <= p->bounds.y1)
4853  break;
4854  if (((double) y > p->bounds.y2) || ((double) x <= p->bounds.x1))
4855  continue;
4856  if ((double) x > p->bounds.x2)
4857  {
4858  winding_number+=p->direction != 0 ? 1 : -1;
4859  continue;
4860  }
4861  i=(ssize_t) MagickMax((double) p->highwater,1.0);
4862  for ( ; i < (ssize_t) (p->number_points-1); i++)
4863  if ((double) y <= p->points[i].y)
4864  break;
4865  q=p->points+i-1;
4866  if ((((q+1)->x-q->x)*(y-q->y)) <= (((q+1)->y-q->y)*(x-q->x)))
4867  winding_number+=p->direction != 0 ? 1 : -1;
4868  }
4869  if (fill_rule != NonZeroRule)
4870  {
4871  if ((MagickAbsoluteValue(winding_number) & 0x01) != 0)
4872  return(1.0);
4873  }
4874  else
4875  if (MagickAbsoluteValue(winding_number) != 0)
4876  return(1.0);
4877  return(subpath_opacity);
4878 }
4879 
4880 static MagickBooleanType DrawPolygonPrimitive(Image *image,
4881  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4882 {
4883  typedef struct _ExtentInfo
4884  {
4885  ssize_t
4886  x1,
4887  y1,
4888  x2,
4889  y2;
4890  } ExtentInfo;
4891 
4892  CacheView
4893  *image_view;
4894 
4895  const char
4896  *artifact;
4897 
4898  double
4899  mid;
4900 
4902  *exception;
4903 
4904  ExtentInfo
4905  poly_extent;
4906 
4907  MagickBooleanType
4908  fill,
4909  status;
4910 
4911  PolygonInfo
4912  **magick_restrict polygon_info;
4913 
4914  EdgeInfo
4915  *p;
4916 
4917  SegmentInfo
4918  bounds;
4919 
4920  size_t
4921  number_threads = 1;
4922 
4923  ssize_t
4924  i,
4925  y;
4926 
4927  assert(image != (Image *) NULL);
4928  assert(image->signature == MagickCoreSignature);
4929  assert(draw_info != (DrawInfo *) NULL);
4930  assert(draw_info->signature == MagickCoreSignature);
4931  assert(primitive_info != (PrimitiveInfo *) NULL);
4932  if (IsEventLogging() != MagickFalse)
4933  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
4934  if (primitive_info->coordinates <= 1)
4935  return(MagickTrue);
4936  /*
4937  Compute bounding box.
4938  */
4939  polygon_info=AcquirePolygonTLS(draw_info,primitive_info,&image->exception);
4940  if (polygon_info == (PolygonInfo **) NULL)
4941  return(MagickFalse);
4942  if (draw_info->debug != MagickFalse)
4943  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-polygon");
4944  fill=(primitive_info->method == FillToBorderMethod) ||
4945  (primitive_info->method == FloodfillMethod) ? MagickTrue : MagickFalse;
4946  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
4947  bounds=polygon_info[0]->edges[0].bounds;
4948  artifact=GetImageArtifact(image,"draw:render-bounding-rectangles");
4949  if (IsStringTrue(artifact) != MagickFalse)
4950  (void) DrawBoundingRectangles(image,draw_info,polygon_info[0]);
4951  for (i=1; i < (ssize_t) polygon_info[0]->number_edges; i++)
4952  {
4953  p=polygon_info[0]->edges+i;
4954  if (p->bounds.x1 < bounds.x1)
4955  bounds.x1=p->bounds.x1;
4956  if (p->bounds.y1 < bounds.y1)
4957  bounds.y1=p->bounds.y1;
4958  if (p->bounds.x2 > bounds.x2)
4959  bounds.x2=p->bounds.x2;
4960  if (p->bounds.y2 > bounds.y2)
4961  bounds.y2=p->bounds.y2;
4962  }
4963  bounds.x1-=(mid+1.0);
4964  bounds.y1-=(mid+1.0);
4965  bounds.x2+=(mid+1.0);
4966  bounds.y2+=(mid+1.0);
4967  if ((bounds.x1 >= (double) image->columns) ||
4968  (bounds.y1 >= (double) image->rows) ||
4969  (bounds.x2 <= 0.0) || (bounds.y2 <= 0.0))
4970  {
4971  polygon_info=DestroyPolygonTLS(polygon_info);
4972  return(MagickTrue); /* virtual polygon */
4973  }
4974  bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double) image->columns-1.0 ?
4975  (double) image->columns-1.0 : bounds.x1;
4976  bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double) image->rows-1.0 ?
4977  (double) image->rows-1.0 : bounds.y1;
4978  bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double) image->columns-1.0 ?
4979  (double) image->columns-1.0 : bounds.x2;
4980  bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double) image->rows-1.0 ?
4981  (double) image->rows-1.0 : bounds.y2;
4982  poly_extent.x1=CastDoubleToLong(ceil(bounds.x1-0.5));
4983  poly_extent.y1=CastDoubleToLong(ceil(bounds.y1-0.5));
4984  poly_extent.x2=CastDoubleToLong(floor(bounds.x2+0.5));
4985  poly_extent.y2=CastDoubleToLong(floor(bounds.y2+0.5));
4986  number_threads=GetMagickNumberThreads(image,image,poly_extent.y2-
4987  poly_extent.y1+1,1);
4988  status=AcquirePolygonEdgesTLS(polygon_info,number_threads,&image->exception);
4989  if (status == MagickFalse)
4990  {
4991  polygon_info=DestroyPolygonTLS(polygon_info);
4992  return(status);
4993  }
4994  status=MagickTrue;
4995  exception=(&image->exception);
4996  image_view=AcquireAuthenticCacheView(image,exception);
4997  if ((primitive_info->coordinates == 1) ||
4998  (polygon_info[0]->number_edges == 0))
4999  {
5000  /*
5001  Draw point.
5002  */
5003 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5004  #pragma omp parallel for schedule(static) shared(status) \
5005  num_threads(number_threads)
5006 #endif
5007  for (y=poly_extent.y1; y <= poly_extent.y2; y++)
5008  {
5009  MagickBooleanType
5010  sync;
5011 
5012  PixelPacket
5013  *magick_restrict q;
5014 
5015  ssize_t
5016  x;
5017 
5018  if (status == MagickFalse)
5019  continue;
5020  x=poly_extent.x1;
5021  q=GetCacheViewAuthenticPixels(image_view,x,y,(size_t) (poly_extent.x2-
5022  x+1),1,exception);
5023  if (q == (PixelPacket *) NULL)
5024  {
5025  status=MagickFalse;
5026  continue;
5027  }
5028  for ( ; x <= poly_extent.x2; x++)
5029  {
5030  if ((x == CastDoubleToLong(ceil(primitive_info->point.x-0.5))) &&
5031  (y == CastDoubleToLong(ceil(primitive_info->point.y-0.5))))
5032  (void) GetFillColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,q);
5033  q++;
5034  }
5035  sync=SyncCacheViewAuthenticPixels(image_view,exception);
5036  if (sync == MagickFalse)
5037  status=MagickFalse;
5038  }
5039  image_view=DestroyCacheView(image_view);
5040  polygon_info=DestroyPolygonTLS(polygon_info);
5041  if (draw_info->debug != MagickFalse)
5042  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5043  " end draw-polygon");
5044  return(status);
5045  }
5046  /*
5047  Draw polygon or line.
5048  */
5049  poly_extent.y1=CastDoubleToLong(ceil(bounds.y1-0.5));
5050  poly_extent.y2=CastDoubleToLong(floor(bounds.y2+0.5));
5051 #if defined(MAGICKCORE_OPENMP_SUPPORT)
5052  #pragma omp parallel for schedule(static) shared(status) \
5053  num_threads(number_threads)
5054 #endif
5055  for (y=poly_extent.y1; y <= poly_extent.y2; y++)
5056  {
5057  const int
5058  id = GetOpenMPThreadId();
5059 
5060  PixelPacket
5061  fill_color,
5062  stroke_color;
5063 
5064  PixelPacket
5065  *magick_restrict q;
5066 
5067  ssize_t
5068  x;
5069 
5070  if (status == MagickFalse)
5071  continue;
5072  q=GetCacheViewAuthenticPixels(image_view,poly_extent.x1,y,(size_t)
5073  (poly_extent.x2-poly_extent.x1+1),1,exception);
5074  if (q == (PixelPacket *) NULL)
5075  {
5076  status=MagickFalse;
5077  continue;
5078  }
5079  for (x=poly_extent.x1; x <= poly_extent.x2; x++)
5080  {
5081  double
5082  fill_opacity,
5083  stroke_opacity;
5084 
5085  /*
5086  Fill and/or stroke.
5087  */
5088  fill_opacity=GetOpacityPixel(polygon_info[id],mid,fill,
5089  draw_info->fill_rule,x,y,&stroke_opacity);
5090  if (draw_info->stroke_antialias == MagickFalse)
5091  {
5092  fill_opacity=fill_opacity >= AntialiasThreshold ? 1.0 : 0.0;
5093  stroke_opacity=stroke_opacity >= AntialiasThreshold ? 1.0 : 0.0;
5094  }
5095  (void) GetFillColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,
5096  &fill_color);
5097  fill_opacity=(double) ((MagickRealType) QuantumRange-fill_opacity*
5098  ((MagickRealType) QuantumRange-(MagickRealType) fill_color.opacity));
5099  MagickCompositeOver(&fill_color,(MagickRealType) fill_opacity,q,
5100  (MagickRealType) q->opacity,q);
5101  (void) GetStrokeColor(draw_info,x-poly_extent.x1,y-poly_extent.y1,
5102  &stroke_color);
5103  stroke_opacity=(double) ((MagickRealType) QuantumRange-stroke_opacity*
5104  ((MagickRealType) QuantumRange-(MagickRealType) stroke_color.opacity));
5105  MagickCompositeOver(&stroke_color,(MagickRealType) stroke_opacity,q,
5106  (MagickRealType) q->opacity,q);
5107  q++;
5108  }
5109  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
5110  status=MagickFalse;
5111  }
5112  image_view=DestroyCacheView(image_view);
5113  polygon_info=DestroyPolygonTLS(polygon_info);
5114  if (draw_info->debug != MagickFalse)
5115  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-polygon");
5116  return(status);
5117 }
5118 ␌
5119 /*
5120 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5121 % %
5122 % %
5123 % %
5124 % D r a w P r i m i t i v e %
5125 % %
5126 % %
5127 % %
5128 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5129 %
5130 % DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.
5131 %
5132 % The format of the DrawPrimitive method is:
5133 %
5134 % MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
5135 % PrimitiveInfo *primitive_info)
5136 %
5137 % A description of each parameter follows:
5138 %
5139 % o image: the image.
5140 %
5141 % o draw_info: the draw info.
5142 %
5143 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
5144 %
5145 */
5146 static void LogPrimitiveInfo(const PrimitiveInfo *primitive_info)
5147 {
5148  const char
5149  *methods[] =
5150  {
5151  "point",
5152  "replace",
5153  "floodfill",
5154  "filltoborder",
5155  "reset",
5156  "?"
5157  };
5158 
5159  PointInfo
5160  p,
5161  q,
5162  point;
5163 
5164  ssize_t
5165  i,
5166  x;
5167 
5168  ssize_t
5169  coordinates,
5170  y;
5171 
5172  x=CastDoubleToLong(ceil(primitive_info->point.x-0.5));
5173  y=CastDoubleToLong(ceil(primitive_info->point.y-0.5));
5174  switch (primitive_info->primitive)
5175  {
5176  case PointPrimitive:
5177  {
5178  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5179  "PointPrimitive %.20g,%.20g %s",(double) x,(double) y,
5180  methods[primitive_info->method]);
5181  return;
5182  }
5183  case ColorPrimitive:
5184  {
5185  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5186  "ColorPrimitive %.20g,%.20g %s",(double) x,(double) y,
5187  methods[primitive_info->method]);
5188  return;
5189  }
5190  case MattePrimitive:
5191  {
5192  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5193  "MattePrimitive %.20g,%.20g %s",(double) x,(double) y,
5194  methods[primitive_info->method]);
5195  return;
5196  }
5197  case TextPrimitive:
5198  {
5199  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5200  "TextPrimitive %.20g,%.20g",(double) x,(double) y);
5201  return;
5202  }
5203  case ImagePrimitive:
5204  {
5205  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5206  "ImagePrimitive %.20g,%.20g",(double) x,(double) y);
5207  return;
5208  }
5209  default:
5210  break;
5211  }
5212  coordinates=0;
5213  p=primitive_info[0].point;
5214  q.x=(-1.0);
5215  q.y=(-1.0);
5216  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
5217  {
5218  point=primitive_info[i].point;
5219  if (coordinates <= 0)
5220  {
5221  coordinates=(ssize_t) primitive_info[i].coordinates;
5222  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5223  " begin open (%.20g)",(double) coordinates);
5224  p=point;
5225  }
5226  point=primitive_info[i].point;
5227  if ((fabs(q.x-point.x) >= MagickEpsilon) ||
5228  (fabs(q.y-point.y) >= MagickEpsilon))
5229  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5230  " %.20g: %.18g,%.18g",(double) coordinates,point.x,point.y);
5231  else
5232  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5233  " %.20g: %g %g (duplicate)",(double) coordinates,point.x,point.y);
5234  q=point;
5235  coordinates--;
5236  if (coordinates > 0)
5237  continue;
5238  if ((fabs(p.x-point.x) >= MagickEpsilon) ||
5239  (fabs(p.y-point.y) >= MagickEpsilon))
5240  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end last (%.20g)",
5241  (double) coordinates);
5242  else
5243  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end open (%.20g)",
5244  (double) coordinates);
5245  }
5246 }
5247 
5248 MagickExport MagickBooleanType DrawPrimitive(Image *image,
5249  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5250 {
5251  CacheView
5252  *image_view;
5253 
5255  *exception;
5256 
5257  MagickStatusType
5258  status;
5259 
5260  ssize_t
5261  i,
5262  x;
5263 
5264  ssize_t
5265  y;
5266 
5267  if (draw_info->debug != MagickFalse)
5268  {
5269  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5270  " begin draw-primitive");
5271  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5272  " affine: %g,%g,%g,%g,%g,%g",draw_info->affine.sx,
5273  draw_info->affine.rx,draw_info->affine.ry,draw_info->affine.sy,
5274  draw_info->affine.tx,draw_info->affine.ty);
5275  }
5276  exception=(&image->exception);
5277  status=MagickTrue;
5278  if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
5279  ((IsPixelGray(&draw_info->fill) == MagickFalse) ||
5280  (IsPixelGray(&draw_info->stroke) == MagickFalse)))
5281  status=SetImageColorspace(image,sRGBColorspace);
5282  if (draw_info->compliance == SVGCompliance)
5283  {
5284  status&=SetImageClipMask(image,draw_info->clipping_mask);
5285  status&=SetImageMask(image,draw_info->composite_mask);
5286  }
5287  x=CastDoubleToLong(ceil(primitive_info->point.x-0.5));
5288  y=CastDoubleToLong(ceil(primitive_info->point.y-0.5));
5289  image_view=AcquireAuthenticCacheView(image,exception);
5290  switch (primitive_info->primitive)
5291  {
5292  case ColorPrimitive:
5293  {
5294  switch (primitive_info->method)
5295  {
5296  case PointMethod:
5297  default:
5298  {
5299  PixelPacket
5300  *q;
5301 
5302  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5303  if (q == (PixelPacket *) NULL)
5304  break;
5305  (void) GetFillColor(draw_info,x,y,q);
5306  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5307  break;
5308  }
5309  case ReplaceMethod:
5310  {
5311  PixelPacket
5312  target;
5313 
5314  status&=GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
5315  for (y=0; y < (ssize_t) image->rows; y++)
5316  {
5317  PixelPacket
5318  *magick_restrict q;
5319 
5320  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5321  exception);
5322  if (q == (PixelPacket *) NULL)
5323  break;
5324  for (x=0; x < (ssize_t) image->columns; x++)
5325  {
5326  if (IsColorSimilar(image,q,&target) == MagickFalse)
5327  {
5328  q++;
5329  continue;
5330  }
5331  (void) GetFillColor(draw_info,x,y,q);
5332  q++;
5333  }
5334  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5335  if (status == MagickFalse)
5336  break;
5337  }
5338  break;
5339  }
5340  case FloodfillMethod:
5341  case FillToBorderMethod:
5342  {
5344  target;
5345 
5346  status&=GetOneVirtualMagickPixel(image,x,y,&target,exception);
5347  if (primitive_info->method == FillToBorderMethod)
5348  {
5349  target.red=(MagickRealType) draw_info->border_color.red;
5350  target.green=(MagickRealType) draw_info->border_color.green;
5351  target.blue=(MagickRealType) draw_info->border_color.blue;
5352  }
5353  status&=FloodfillPaintImage(image,DefaultChannels,draw_info,&target,x,
5354  y,primitive_info->method == FloodfillMethod ? MagickFalse :
5355  MagickTrue);
5356  break;
5357  }
5358  case ResetMethod:
5359  {
5360  for (y=0; y < (ssize_t) image->rows; y++)
5361  {
5362  PixelPacket
5363  *magick_restrict q;
5364 
5365  ssize_t
5366  x;
5367 
5368  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5369  exception);
5370  if (q == (PixelPacket *) NULL)
5371  break;
5372  for (x=0; x < (ssize_t) image->columns; x++)
5373  {
5374  (void) GetFillColor(draw_info,x,y,q);
5375  q++;
5376  }
5377  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5378  if (status == MagickFalse)
5379  break;
5380  }
5381  break;
5382  }
5383  }
5384  break;
5385  }
5386  case MattePrimitive:
5387  {
5388  if (image->matte == MagickFalse)
5389  status&=SetImageAlphaChannel(image,OpaqueAlphaChannel);
5390  switch (primitive_info->method)
5391  {
5392  case PointMethod:
5393  default:
5394  {
5395  PixelPacket
5396  pixel;
5397 
5398  PixelPacket
5399  *q;
5400 
5401  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5402  if (q == (PixelPacket *) NULL)
5403  break;
5404  (void) GetFillColor(draw_info,x,y,&pixel);
5405  SetPixelOpacity(q,pixel.opacity);
5406  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5407  break;
5408  }
5409  case ReplaceMethod:
5410  {
5411  PixelPacket
5412  pixel,
5413  target;
5414 
5415  status&=GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
5416  for (y=0; y < (ssize_t) image->rows; y++)
5417  {
5418  PixelPacket
5419  *magick_restrict q;
5420 
5421  ssize_t
5422  x;
5423 
5424  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5425  exception);
5426  if (q == (PixelPacket *) NULL)
5427  break;
5428  for (x=0; x < (ssize_t) image->columns; x++)
5429  {
5430  if (IsColorSimilar(image,q,&target) == MagickFalse)
5431  {
5432  q++;
5433  continue;
5434  }
5435  (void) GetFillColor(draw_info,x,y,&pixel);
5436  SetPixelOpacity(q,pixel.opacity);
5437  q++;
5438  }
5439  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5440  if (status == MagickFalse)
5441  break;
5442  }
5443  break;
5444  }
5445  case FloodfillMethod:
5446  case FillToBorderMethod:
5447  {
5449  target;
5450 
5451  status&=GetOneVirtualMagickPixel(image,x,y,&target,exception);
5452  if (primitive_info->method == FillToBorderMethod)
5453  {
5454  target.red=(MagickRealType) draw_info->border_color.red;
5455  target.green=(MagickRealType) draw_info->border_color.green;
5456  target.blue=(MagickRealType) draw_info->border_color.blue;
5457  }
5458  status&=FloodfillPaintImage(image,OpacityChannel,draw_info,&target,x,
5459  y,primitive_info->method == FloodfillMethod ? MagickFalse :
5460  MagickTrue);
5461  break;
5462  }
5463  case ResetMethod:
5464  {
5465  PixelPacket
5466  pixel;
5467 
5468  for (y=0; y < (ssize_t) image->rows; y++)
5469  {
5470  PixelPacket
5471  *magick_restrict q;
5472 
5473  ssize_t
5474  x;
5475 
5476  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
5477  exception);
5478  if (q == (PixelPacket *) NULL)
5479  break;
5480  for (x=0; x < (ssize_t) image->columns; x++)
5481  {
5482  (void) GetFillColor(draw_info,x,y,&pixel);
5483  SetPixelOpacity(q,pixel.opacity);
5484  q++;
5485  }
5486  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5487  if (status == MagickFalse)
5488  break;
5489  }
5490  break;
5491  }
5492  }
5493  break;
5494  }
5495  case ImagePrimitive:
5496  {
5497  AffineMatrix
5498  affine;
5499 
5500  char
5501  composite_geometry[MaxTextExtent];
5502 
5503  Image
5504  *composite_image,
5505  *composite_images;
5506 
5507  ImageInfo
5508  *clone_info;
5509 
5511  geometry;
5512 
5513  ssize_t
5514  x1,
5515  y1;
5516 
5517  if (primitive_info->text == (char *) NULL)
5518  break;
5519  clone_info=AcquireImageInfo();
5520  composite_images=(Image *) NULL;
5521  if (LocaleNCompare(primitive_info->text,"data:",5) == 0)
5522  composite_images=ReadInlineImage(clone_info,primitive_info->text,
5523  &image->exception);
5524  else
5525  if (*primitive_info->text != '\0')
5526  {
5527  const MagickInfo
5528  *magick_info;
5529 
5530  MagickStatusType
5531  path_status;
5532 
5533  struct stat
5534  attributes;
5535 
5536  /*
5537  Read composite image.
5538  */
5539  (void) CopyMagickString(clone_info->filename,primitive_info->text,
5540  MagickPathExtent);
5541  (void) SetImageInfo(clone_info,1,exception);
5542  magick_info=GetMagickInfo(clone_info->magick,exception);
5543  if ((magick_info != (const MagickInfo*) NULL) &&
5544  (LocaleCompare(magick_info->magick_module,"SVG") == 0))
5545  {
5546  (void) ThrowMagickException(exception,GetMagickModule(),
5547  CorruptImageError,"ImageTypeNotSupported","`%s'",
5548  clone_info->filename);
5549  clone_info=DestroyImageInfo(clone_info);
5550  break;
5551  }
5552  (void) CopyMagickString(clone_info->filename,primitive_info->text,
5553  MagickPathExtent);
5554  if (clone_info->size != (char *) NULL)
5555  clone_info->size=DestroyString(clone_info->size);
5556  if (clone_info->extract != (char *) NULL)
5557  clone_info->extract=DestroyString(clone_info->extract);
5558  path_status=GetPathAttributes(clone_info->filename,&attributes);
5559  if (path_status != MagickFalse)
5560  {
5561  if (S_ISCHR(attributes.st_mode) == 0)
5562  composite_images=ReadImage(clone_info,exception);
5563  else
5564  (void) ThrowMagickException(exception,GetMagickModule(),
5565  FileOpenError,"UnableToOpenFile","`%s'",
5566  clone_info->filename);
5567  }
5568  else
5569  if ((LocaleCompare(clone_info->magick,"ftp") != 0) &&
5570  (LocaleCompare(clone_info->magick,"http") != 0) &&
5571  (LocaleCompare(clone_info->magick,"https") != 0) &&
5572  (LocaleCompare(clone_info->magick,"vid") != 0))
5573  composite_images=ReadImage(clone_info,exception);
5574  else
5575  (void) ThrowMagickException(exception,GetMagickModule(),
5576  FileOpenError,"UnableToOpenFile","`%s'",clone_info->filename);
5577  }
5578  clone_info=DestroyImageInfo(clone_info);
5579  if (composite_images == (Image *) NULL)
5580  {
5581  status=0;
5582  break;
5583  }
5584  composite_image=RemoveFirstImageFromList(&composite_images);
5585  composite_images=DestroyImageList(composite_images);
5586  (void) SetImageProgressMonitor(composite_image,(MagickProgressMonitor)
5587  NULL,(void *) NULL);
5588  x1=CastDoubleToLong(ceil(primitive_info[1].point.x-0.5));
5589  y1=CastDoubleToLong(ceil(primitive_info[1].point.y-0.5));
5590  if (((x1 != 0L) && (x1 != (ssize_t) composite_image->columns)) ||
5591  ((y1 != 0L) && (y1 != (ssize_t) composite_image->rows)))
5592  {
5593  char
5594  geometry[MaxTextExtent];
5595 
5596  /*
5597  Resize image.
5598  */
5599  (void) FormatLocaleString(geometry,MaxTextExtent,"%gx%g!",
5600  primitive_info[1].point.x,primitive_info[1].point.y);
5601  composite_image->filter=image->filter;
5602  status&=TransformImage(&composite_image,(char *) NULL,geometry);
5603  }
5604  if (composite_image->matte == MagickFalse)
5605  status&=SetImageAlphaChannel(composite_image,OpaqueAlphaChannel);
5606  if (draw_info->opacity != OpaqueOpacity)
5607  status&=SetImageOpacity(composite_image,draw_info->opacity);
5608  SetGeometry(image,&geometry);
5609  image->gravity=draw_info->gravity;
5610  geometry.x=x;
5611  geometry.y=y;
5612  (void) FormatLocaleString(composite_geometry,MaxTextExtent,
5613  "%.20gx%.20g%+.20g%+.20g",(double) composite_image->columns,(double)
5614  composite_image->rows,(double) geometry.x,(double) geometry.y);
5615  (void) ParseGravityGeometry(image,composite_geometry,&geometry,
5616  &image->exception);
5617  affine=draw_info->affine;
5618  affine.tx=(double) geometry.x;
5619  affine.ty=(double) geometry.y;
5620  composite_image->interpolate=image->interpolate;
5621  if ((draw_info->compose == OverCompositeOp) ||
5622  (draw_info->compose == SrcOverCompositeOp))
5623  status&=DrawAffineImage(image,composite_image,&affine);
5624  else
5625  status&=CompositeImage(image,draw_info->compose,composite_image,
5626  geometry.x,geometry.y);
5627  composite_image=DestroyImage(composite_image);
5628  break;
5629  }
5630  case PointPrimitive:
5631  {
5632  PixelPacket
5633  fill_color;
5634 
5635  PixelPacket
5636  *q;
5637 
5638  if ((y < 0) || (y >= (ssize_t) image->rows))
5639  break;
5640  if ((x < 0) || (x >= (ssize_t) image->columns))
5641  break;
5642  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
5643  if (q == (PixelPacket *) NULL)
5644  break;
5645  (void) GetFillColor(draw_info,x,y,&fill_color);
5646  MagickCompositeOver(&fill_color,(MagickRealType) fill_color.opacity,q,
5647  (MagickRealType) q->opacity,q);
5648  status&=SyncCacheViewAuthenticPixels(image_view,exception);
5649  break;
5650  }
5651  case TextPrimitive:
5652  {
5653  char
5654  geometry[MaxTextExtent];
5655 
5656  DrawInfo
5657  *clone_info;
5658 
5659  if (primitive_info->text == (char *) NULL)
5660  break;
5661  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5662  (void) CloneString(&clone_info->text,primitive_info->text);
5663  (void) FormatLocaleString(geometry,MaxTextExtent,"%+f%+f",
5664  primitive_info->point.x,primitive_info->point.y);
5665  (void) CloneString(&clone_info->geometry,geometry);
5666  status&=AnnotateImage(image,clone_info);
5667  clone_info=DestroyDrawInfo(clone_info);
5668  break;
5669  }
5670  default:
5671  {
5672  double
5673  mid,
5674  scale;
5675 
5676  DrawInfo
5677  *clone_info;
5678 
5679  if (IsEventLogging() != MagickFalse)
5680  LogPrimitiveInfo(primitive_info);
5681  scale=ExpandAffine(&draw_info->affine);
5682  if ((draw_info->dash_pattern != (double *) NULL) &&
5683  (fabs(draw_info->dash_pattern[0]) >= MagickEpsilon) &&
5684  (fabs(scale*draw_info->stroke_width) >= MagickEpsilon) &&
5685  (draw_info->stroke.opacity != (Quantum) TransparentOpacity))
5686  {
5687  /*
5688  Draw dash polygon.
5689  */
5690  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5691  clone_info->stroke_width=0.0;
5692  clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5693  status&=DrawPolygonPrimitive(image,clone_info,primitive_info);
5694  clone_info=DestroyDrawInfo(clone_info);
5695  if (status != MagickFalse)
5696  status&=DrawDashPolygon(draw_info,primitive_info,image);
5697  break;
5698  }
5699  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
5700  if ((mid > 1.0) &&
5701  ((draw_info->stroke.opacity != (Quantum) TransparentOpacity) ||
5702  (draw_info->stroke_pattern != (Image *) NULL)))
5703  {
5704  double
5705  x,
5706  y;
5707 
5708  MagickBooleanType
5709  closed_path;
5710 
5711  /*
5712  Draw strokes while respecting line cap/join attributes.
5713  */
5714  closed_path=primitive_info[0].closed_subpath;
5715  i=(ssize_t) primitive_info[0].coordinates;
5716  x=fabs(primitive_info[i-1].point.x-primitive_info[0].point.x);
5717  y=fabs(primitive_info[i-1].point.y-primitive_info[0].point.y);
5718  if ((x < MagickEpsilon) && (y < MagickEpsilon))
5719  closed_path=MagickTrue;
5720  if ((((draw_info->linecap == RoundCap) ||
5721  (closed_path != MagickFalse)) &&
5722  (draw_info->linejoin == RoundJoin)) ||
5723  (primitive_info[i].primitive != UndefinedPrimitive))
5724  {
5725  status&=DrawPolygonPrimitive(image,draw_info,primitive_info);
5726  break;
5727  }
5728  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5729  clone_info->stroke_width=0.0;
5730  clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5731  status&=DrawPolygonPrimitive(image,clone_info,primitive_info);
5732  clone_info=DestroyDrawInfo(clone_info);
5733  if (status != MagickFalse)
5734  status&=DrawStrokePolygon(image,draw_info,primitive_info);
5735  break;
5736  }
5737  status&=DrawPolygonPrimitive(image,draw_info,primitive_info);
5738  break;
5739  }
5740  }
5741  image_view=DestroyCacheView(image_view);
5742  if (draw_info->compliance == SVGCompliance)
5743  {
5744  status&=SetImageClipMask(image,(Image *) NULL);
5745  status&=SetImageMask(image,(Image *) NULL);
5746  }
5747  if (draw_info->debug != MagickFalse)
5748  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-primitive");
5749  return(status != 0 ? MagickTrue : MagickFalse);
5750 }
5751 ␌
5752 /*
5753 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5754 % %
5755 % %
5756 % %
5757 + D r a w S t r o k e P o l y g o n %
5758 % %
5759 % %
5760 % %
5761 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5762 %
5763 % DrawStrokePolygon() draws a stroked polygon (line, rectangle, ellipse) on
5764 % the image while respecting the line cap and join attributes.
5765 %
5766 % The format of the DrawStrokePolygon method is:
5767 %
5768 % MagickBooleanType DrawStrokePolygon(Image *image,
5769 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5770 %
5771 % A description of each parameter follows:
5772 %
5773 % o image: the image.
5774 %
5775 % o draw_info: the draw info.
5776 %
5777 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
5778 %
5779 %
5780 */
5781 
5782 static MagickBooleanType DrawRoundLinecap(Image *image,
5783  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5784 {
5786  linecap[5];
5787 
5788  ssize_t
5789  i;
5790 
5791  for (i=0; i < 4; i++)
5792  linecap[i]=(*primitive_info);
5793  linecap[0].coordinates=4;
5794  linecap[1].point.x+=2.0*MagickEpsilon;
5795  linecap[2].point.x+=2.0*MagickEpsilon;
5796  linecap[2].point.y+=2.0*MagickEpsilon;
5797  linecap[3].point.y+=2.0*MagickEpsilon;
5798  linecap[4].primitive=UndefinedPrimitive;
5799  return(DrawPolygonPrimitive(image,draw_info,linecap));
5800 }
5801 
5802 static MagickBooleanType DrawStrokePolygon(Image *image,
5803  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
5804 {
5805  DrawInfo
5806  *clone_info;
5807 
5808  MagickBooleanType
5809  closed_path;
5810 
5811  MagickStatusType
5812  status;
5813 
5815  *stroke_polygon;
5816 
5817  const PrimitiveInfo
5818  *p,
5819  *q;
5820 
5821  /*
5822  Draw stroked polygon.
5823  */
5824  if (draw_info->debug != MagickFalse)
5825  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5826  " begin draw-stroke-polygon");
5827  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
5828  clone_info->fill=draw_info->stroke;
5829  if (clone_info->fill_pattern != (Image *) NULL)
5830  clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
5831  if (clone_info->stroke_pattern != (Image *) NULL)
5832  clone_info->fill_pattern=CloneImage(clone_info->stroke_pattern,0,0,
5833  MagickTrue,&clone_info->stroke_pattern->exception);
5834  clone_info->stroke.opacity=(Quantum) TransparentOpacity;
5835  clone_info->stroke_width=0.0;
5836  clone_info->fill_rule=NonZeroRule;
5837  status=MagickTrue;
5838  for (p=primitive_info; p->primitive != UndefinedPrimitive; p+=p->coordinates)
5839  {
5840  if (p->coordinates == 1)
5841  continue;
5842  stroke_polygon=TraceStrokePolygon(draw_info,p,&image->exception);
5843  if (stroke_polygon == (PrimitiveInfo *) NULL)
5844  {
5845  status=0;
5846  break;
5847  }
5848  status&=DrawPolygonPrimitive(image,clone_info,stroke_polygon);
5849  stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
5850  if (status == 0)
5851  break;
5852  q=p+p->coordinates-1;
5853  closed_path=p->closed_subpath;
5854  if ((draw_info->linecap == RoundCap) && (closed_path == MagickFalse))
5855  {
5856  status&=DrawRoundLinecap(image,draw_info,p);
5857  status&=DrawRoundLinecap(image,draw_info,q);
5858  }
5859  }
5860  clone_info=DestroyDrawInfo(clone_info);
5861  if (draw_info->debug != MagickFalse)
5862  (void) LogMagickEvent(DrawEvent,GetMagickModule(),
5863  " end draw-stroke-polygon");
5864  return(status != 0 ? MagickTrue : MagickFalse);
5865 }
5866 ␌
5867 /*
5868 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5869 % %
5870 % %
5871 % %
5872 % G e t A f f i n e M a t r i x %
5873 % %
5874 % %
5875 % %
5876 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5877 %
5878 % GetAffineMatrix() returns an AffineMatrix initialized to the identity
5879 % matrix.
5880 %
5881 % The format of the GetAffineMatrix method is:
5882 %
5883 % void GetAffineMatrix(AffineMatrix *affine_matrix)
5884 %
5885 % A description of each parameter follows:
5886 %
5887 % o affine_matrix: the affine matrix.
5888 %
5889 */
5890 MagickExport void GetAffineMatrix(AffineMatrix *affine_matrix)
5891 {
5892  assert(affine_matrix != (AffineMatrix *) NULL);
5893  if (IsEventLogging() != MagickFalse)
5894  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
5895  (void) memset(affine_matrix,0,sizeof(*affine_matrix));
5896  affine_matrix->sx=1.0;
5897  affine_matrix->sy=1.0;
5898 }
5899 ␌
5900 /*
5901 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5902 % %
5903 % %
5904 % %
5905 + G e t D r a w I n f o %
5906 % %
5907 % %
5908 % %
5909 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5910 %
5911 % GetDrawInfo() initializes draw_info to default values from image_info.
5912 %
5913 % The format of the GetDrawInfo method is:
5914 %
5915 % void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
5916 %
5917 % A description of each parameter follows:
5918 %
5919 % o image_info: the image info..
5920 %
5921 % o draw_info: the draw info.
5922 %
5923 */
5924 MagickExport void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
5925 {
5926  char
5927  *next_token;
5928 
5929  const char
5930  *option;
5931 
5933  *exception;
5934 
5935  /*
5936  Initialize draw attributes.
5937  */
5938  assert(draw_info != (DrawInfo *) NULL);
5939  if (IsEventLogging() != MagickFalse)
5940  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
5941  (void) memset(draw_info,0,sizeof(*draw_info));
5942  draw_info->image_info=CloneImageInfo(image_info);
5943  GetAffineMatrix(&draw_info->affine);
5944  exception=AcquireExceptionInfo();
5945  (void) QueryColorDatabase("#000F",&draw_info->fill,exception);
5946  (void) QueryColorDatabase("#FFF0",&draw_info->stroke,exception);
5947  draw_info->stroke_antialias=draw_info->image_info->antialias;
5948  draw_info->stroke_width=1.0;
5949  draw_info->fill_rule=EvenOddRule;
5950  draw_info->opacity=OpaqueOpacity;
5951  draw_info->fill_opacity=OpaqueOpacity;
5952  draw_info->stroke_opacity=OpaqueOpacity;
5953  draw_info->linecap=ButtCap;
5954  draw_info->linejoin=MiterJoin;
5955  draw_info->miterlimit=10;
5956  draw_info->decorate=NoDecoration;
5957  if (draw_info->image_info->font != (char *) NULL)
5958  draw_info->font=AcquireString(draw_info->image_info->font);
5959  if (draw_info->image_info->density != (char *) NULL)
5960  draw_info->density=AcquireString(draw_info->image_info->density);
5961  draw_info->text_antialias=draw_info->image_info->antialias;
5962  draw_info->pointsize=12.0;
5963  if (fabs(draw_info->image_info->pointsize) >= MagickEpsilon)
5964  draw_info->pointsize=draw_info->image_info->pointsize;
5965  draw_info->undercolor.opacity=(Quantum) TransparentOpacity;
5966  draw_info->border_color=draw_info->image_info->border_color;
5967  draw_info->compose=OverCompositeOp;
5968  if (draw_info->image_info->server_name != (char *) NULL)
5969  draw_info->server_name=AcquireString(draw_info->image_info->server_name);
5970  draw_info->render=MagickTrue;
5971  draw_info->clip_path=MagickFalse;
5972  draw_info->debug=(GetLogEventMask() & (DrawEvent | AnnotateEvent)) != 0 ?
5973  MagickTrue : MagickFalse;
5974  option=GetImageOption(draw_info->image_info,"direction");
5975  if (option != (const char *) NULL)
5976  draw_info->direction=(DirectionType) ParseCommandOption(
5977  MagickDirectionOptions,MagickFalse,option);
5978  else
5979  draw_info->direction=UndefinedDirection;
5980  option=GetImageOption(draw_info->image_info,"encoding");
5981  if (option != (const char *) NULL)
5982  (void) CloneString(&draw_info->encoding,option);
5983  option=GetImageOption(draw_info->image_info,"family");
5984  if (option != (const char *) NULL)
5985  (void) CloneString(&draw_info->family,option);
5986  option=GetImageOption(draw_info->image_info,"fill");
5987  if (option != (const char *) NULL)
5988  (void) QueryColorDatabase(option,&draw_info->fill,exception);
5989  option=GetImageOption(draw_info->image_info,"gravity");
5990  if (option != (const char *) NULL)
5991  draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
5992  MagickFalse,option);
5993  option=GetImageOption(draw_info->image_info,"interline-spacing");
5994  if (option != (const char *) NULL)
5995  draw_info->interline_spacing=GetDrawValue(option,&next_token);
5996  option=GetImageOption(draw_info->image_info,"interword-spacing");
5997  if (option != (const char *) NULL)
5998  draw_info->interword_spacing=GetDrawValue(option,&next_token);
5999  option=GetImageOption(draw_info->image_info,"kerning");
6000  if (option != (const char *) NULL)
6001  draw_info->kerning=GetDrawValue(option,&next_token);
6002  option=GetImageOption(draw_info->image_info,"stroke");
6003  if (option != (const char *) NULL)
6004  (void) QueryColorDatabase(option,&draw_info->stroke,exception);
6005  option=GetImageOption(draw_info->image_info,"strokewidth");
6006  if (option != (const char *) NULL)
6007  draw_info->stroke_width=GetDrawValue(option,&next_token);
6008  option=GetImageOption(draw_info->image_info,"style");
6009  if (option != (const char *) NULL)
6010  draw_info->style=(StyleType) ParseCommandOption(MagickStyleOptions,
6011  MagickFalse,option);
6012  option=GetImageOption(draw_info->image_info,"undercolor");
6013  if (option != (const char *) NULL)
6014  (void) QueryColorDatabase(option,&draw_info->undercolor,exception);
6015  option=GetImageOption(draw_info->image_info,"weight");
6016  if (option != (const char *) NULL)
6017  {
6018  ssize_t
6019  weight;
6020 
6021  weight=ParseCommandOption(MagickWeightOptions,MagickFalse,option);
6022  if (weight == -1)
6023  weight=(ssize_t) StringToUnsignedLong(option);
6024  draw_info->weight=(size_t) weight;
6025  }
6026  exception=DestroyExceptionInfo(exception);
6027  draw_info->signature=MagickCoreSignature;
6028 }
6029 ␌
6030 /*
6031 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6032 % %
6033 % %
6034 % %
6035 + P e r m u t a t e %
6036 % %
6037 % %
6038 % %
6039 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6040 %
6041 % Permutate() returns the permutation of the (n,k).
6042 %
6043 % The format of the Permutate method is:
6044 %
6045 % void Permutate(ssize_t n,ssize_t k)
6046 %
6047 % A description of each parameter follows:
6048 %
6049 % o n:
6050 %
6051 % o k:
6052 %
6053 %
6054 */
6055 static inline double Permutate(const ssize_t n,const ssize_t k)
6056 {
6057  double
6058  r;
6059 
6060  ssize_t
6061  i;
6062 
6063  r=1.0;
6064  for (i=k+1; i <= n; i++)
6065  r*=i;
6066  for (i=1; i <= (n-k); i++)
6067  r/=i;
6068  return(r);
6069 }
6070 ␌
6071 /*
6072 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6073 % %
6074 % %
6075 % %
6076 + T r a c e P r i m i t i v e %
6077 % %
6078 % %
6079 % %
6080 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6081 %
6082 % TracePrimitive is a collection of methods for generating graphic
6083 % primitives such as arcs, ellipses, paths, etc.
6084 %
6085 */
6086 
6087 static MagickBooleanType TraceArc(MVGInfo *mvg_info,const PointInfo start,
6088  const PointInfo end,const PointInfo degrees)
6089 {
6090  PointInfo
6091  center,
6092  radius;
6093 
6094  center.x=0.5*(end.x+start.x);
6095  center.y=0.5*(end.y+start.y);
6096  radius.x=fabs(center.x-start.x);
6097  radius.y=fabs(center.y-start.y);
6098  return(TraceEllipse(mvg_info,center,radius,degrees));
6099 }
6100 
6101 static MagickBooleanType TraceArcPath(MVGInfo *mvg_info,const PointInfo start,
6102  const PointInfo end,const PointInfo arc,const double angle,
6103  const MagickBooleanType large_arc,const MagickBooleanType sweep)
6104 {
6105  double
6106  alpha,
6107  beta,
6108  delta,
6109  factor,
6110  gamma,
6111  theta;
6112 
6113  MagickStatusType
6114  status;
6115 
6116  PointInfo
6117  center,
6118  points[3],
6119  radii;
6120 
6121  double
6122  cosine,
6123  sine;
6124 
6126  *primitive_info;
6127 
6129  *p;
6130 
6131  ssize_t
6132  i;
6133 
6134  size_t
6135  arc_segments;
6136 
6137  ssize_t
6138  offset;
6139 
6140  offset=mvg_info->offset;
6141  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6142  primitive_info->coordinates=0;
6143  if ((fabs(start.x-end.x) < MagickEpsilon) &&
6144  (fabs(start.y-end.y) < MagickEpsilon))
6145  return(TracePoint(primitive_info,end));
6146  radii.x=fabs(arc.x);
6147  radii.y=fabs(arc.y);
6148  if ((radii.x < MagickEpsilon) || (radii.y < MagickEpsilon))
6149  return(TraceLine(primitive_info,start,end));
6150  cosine=cos(DegreesToRadians(fmod((double) angle,360.0)));
6151  sine=sin(DegreesToRadians(fmod((double) angle,360.0)));
6152  center.x=(double) (cosine*(end.x-start.x)/2+sine*(end.y-start.y)/2);
6153  center.y=(double) (cosine*(end.y-start.y)/2-sine*(end.x-start.x)/2);
6154  delta=(center.x*center.x)/(radii.x*radii.x)+(center.y*center.y)/
6155  (radii.y*radii.y);
6156  if (delta < MagickEpsilon)
6157  return(TraceLine(primitive_info,start,end));
6158  if (delta > 1.0)
6159  {
6160  radii.x*=sqrt((double) delta);
6161  radii.y*=sqrt((double) delta);
6162  }
6163  points[0].x=(double) (cosine*start.x/radii.x+sine*start.y/radii.x);
6164  points[0].y=(double) (cosine*start.y/radii.y-sine*start.x/radii.y);
6165  points[1].x=(double) (cosine*end.x/radii.x+sine*end.y/radii.x);
6166  points[1].y=(double) (cosine*end.y/radii.y-sine*end.x/radii.y);
6167  alpha=points[1].x-points[0].x;
6168  beta=points[1].y-points[0].y;
6169  if (fabs(alpha*alpha+beta*beta) < MagickEpsilon)
6170  return(TraceLine(primitive_info,start,end));
6171  factor=PerceptibleReciprocal(alpha*alpha+beta*beta)-0.25;
6172  if (factor <= 0.0)
6173  factor=0.0;
6174  else
6175  {
6176  factor=sqrt((double) factor);
6177  if (sweep == large_arc)
6178  factor=(-factor);
6179  }
6180  center.x=(double) ((points[0].x+points[1].x)/2-factor*beta);
6181  center.y=(double) ((points[0].y+points[1].y)/2+factor*alpha);
6182  alpha=atan2(points[0].y-center.y,points[0].x-center.x);
6183  theta=atan2(points[1].y-center.y,points[1].x-center.x)-alpha;
6184  if ((theta < 0.0) && (sweep != MagickFalse))
6185  theta+=2.0*MagickPI;
6186  else
6187  if ((theta > 0.0) && (sweep == MagickFalse))
6188  theta-=2.0*MagickPI;
6189  arc_segments=(size_t) CastDoubleToLong(ceil(fabs((double) (theta/(0.5*
6190  MagickPI+MagickEpsilon)))));
6191  p=primitive_info;
6192  status=MagickTrue;
6193  for (i=0; i < (ssize_t) arc_segments; i++)
6194  {
6195  beta=0.5*((alpha+(i+1)*theta/arc_segments)-(alpha+i*theta/arc_segments));
6196  gamma=(8.0/3.0)*sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))*
6197  sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))/
6198  sin(fmod((double) beta,DegreesToRadians(360.0)));
6199  points[0].x=(double) (center.x+cos(fmod((double) (alpha+(double) i*theta/
6200  arc_segments),DegreesToRadians(360.0)))-gamma*sin(fmod((double) (alpha+
6201  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
6202  points[0].y=(double) (center.y+sin(fmod((double) (alpha+(double) i*theta/
6203  arc_segments),DegreesToRadians(360.0)))+gamma*cos(fmod((double) (alpha+
6204  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
6205  points[2].x=(double) (center.x+cos(fmod((double) (alpha+(double) (i+1)*
6206  theta/arc_segments),DegreesToRadians(360.0))));
6207  points[2].y=(double) (center.y+sin(fmod((double) (alpha+(double) (i+1)*
6208  theta/arc_segments),DegreesToRadians(360.0))));
6209  points[1].x=(double) (points[2].x+gamma*sin(fmod((double) (alpha+(double)
6210  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
6211  points[1].y=(double) (points[2].y-gamma*cos(fmod((double) (alpha+(double)
6212  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
6213  p->point.x=(p == primitive_info) ? start.x : (p-1)->point.x;
6214  p->point.y=(p == primitive_info) ? start.y : (p-1)->point.y;
6215  (p+1)->point.x=(double) (cosine*radii.x*points[0].x-sine*radii.y*
6216  points[0].y);
6217  (p+1)->point.y=(double) (sine*radii.x*points[0].x+cosine*radii.y*
6218  points[0].y);
6219  (p+2)->point.x=(double) (cosine*radii.x*points[1].x-sine*radii.y*
6220  points[1].y);
6221  (p+2)->point.y=(double) (sine*radii.x*points[1].x+cosine*radii.y*
6222  points[1].y);
6223  (p+3)->point.x=(double) (cosine*radii.x*points[2].x-sine*radii.y*
6224  points[2].y);
6225  (p+3)->point.y=(double) (sine*radii.x*points[2].x+cosine*radii.y*
6226  points[2].y);
6227  if (i == (ssize_t) (arc_segments-1))
6228  (p+3)->point=end;
6229  status&=TraceBezier(mvg_info,4);
6230  if (status == 0)
6231  break;
6232  p=(*mvg_info->primitive_info)+mvg_info->offset;
6233  mvg_info->offset+=p->coordinates;
6234  p+=p->coordinates;
6235  }
6236  if (status == 0)
6237  return(MagickFalse);
6238  mvg_info->offset=offset;
6239  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6240  primitive_info->coordinates=(size_t) (p-primitive_info);
6241  primitive_info->closed_subpath=MagickFalse;
6242  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6243  {
6244  p->primitive=primitive_info->primitive;
6245  p--;
6246  }
6247  return(MagickTrue);
6248 }
6249 
6250 static MagickBooleanType TraceBezier(MVGInfo *mvg_info,
6251  const size_t number_coordinates)
6252 {
6253  double
6254  alpha,
6255  *coefficients,
6256  weight;
6257 
6258  PointInfo
6259  end,
6260  point,
6261  *points;
6262 
6264  *primitive_info;
6265 
6267  *p;
6268 
6269  ssize_t
6270  i,
6271  j;
6272 
6273  size_t
6274  control_points,
6275  quantum;
6276 
6277  /*
6278  Allocate coefficients.
6279  */
6280  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6281  quantum=number_coordinates;
6282  for (i=0; i < (ssize_t) number_coordinates; i++)
6283  {
6284  for (j=i+1; j < (ssize_t) number_coordinates; j++)
6285  {
6286  alpha=fabs(primitive_info[j].point.x-primitive_info[i].point.x);
6287  if (alpha > (double) MAGICK_SSIZE_MAX)
6288  {
6289  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6290  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6291  return(MagickFalse);
6292  }
6293  if (alpha > (double) quantum)
6294  quantum=(size_t) alpha;
6295  alpha=fabs(primitive_info[j].point.y-primitive_info[i].point.y);
6296  if (alpha > (double) MAGICK_SSIZE_MAX)
6297  {
6298  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6299  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6300  return(MagickFalse);
6301  }
6302  if (alpha > (double) quantum)
6303  quantum=(size_t) alpha;
6304  }
6305  }
6306  coefficients=(double *) AcquireQuantumMemory(number_coordinates,
6307  sizeof(*coefficients));
6308  quantum=MagickMin(quantum/number_coordinates,BezierQuantum);
6309  points=(PointInfo *) AcquireQuantumMemory(quantum,number_coordinates*
6310  sizeof(*points));
6311  if ((coefficients == (double *) NULL) || (points == (PointInfo *) NULL))
6312  {
6313  if (points != (PointInfo *) NULL)
6314  points=(PointInfo *) RelinquishMagickMemory(points);
6315  if (coefficients != (double *) NULL)
6316  coefficients=(double *) RelinquishMagickMemory(coefficients);
6317  (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
6318  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
6319  return(MagickFalse);
6320  }
6321  control_points=quantum*number_coordinates;
6322  if (CheckPrimitiveExtent(mvg_info,(double) control_points+1) == MagickFalse)
6323  {
6324  points=(PointInfo *) RelinquishMagickMemory(points);
6325  coefficients=(double *) RelinquishMagickMemory(coefficients);
6326  return(MagickFalse);
6327  }
6328  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6329  /*
6330  Compute bezier points.
6331  */
6332  end=primitive_info[number_coordinates-1].point;
6333  for (i=0; i < (ssize_t) number_coordinates; i++)
6334  coefficients[i]=Permutate((ssize_t) number_coordinates-1,i);
6335  weight=0.0;
6336  for (i=0; i < (ssize_t) control_points; i++)
6337  {
6338  p=primitive_info;
6339  point.x=0.0;
6340  point.y=0.0;
6341  alpha=pow((double) (1.0-weight),(double) number_coordinates-1.0);
6342  for (j=0; j < (ssize_t) number_coordinates; j++)
6343  {
6344  point.x+=alpha*coefficients[j]*p->point.x;
6345  point.y+=alpha*coefficients[j]*p->point.y;
6346  alpha*=weight/(1.0-weight);
6347  p++;
6348  }
6349  points[i]=point;
6350  weight+=1.0/control_points;
6351  }
6352  /*
6353  Bezier curves are just short segmented polys.
6354  */
6355  p=primitive_info;
6356  for (i=0; i < (ssize_t) control_points; i++)
6357  {
6358  if (TracePoint(p,points[i]) == MagickFalse)
6359  {
6360  points=(PointInfo *) RelinquishMagickMemory(points);
6361  coefficients=(double *) RelinquishMagickMemory(coefficients);
6362  return(MagickFalse);
6363  }
6364  p+=p->coordinates;
6365  }
6366  if (TracePoint(p,end) == MagickFalse)
6367  {
6368  points=(PointInfo *) RelinquishMagickMemory(points);
6369  coefficients=(double *) RelinquishMagickMemory(coefficients);
6370  return(MagickFalse);
6371  }
6372  p+=p->coordinates;
6373  primitive_info->coordinates=(size_t) (p-primitive_info);
6374  primitive_info->closed_subpath=MagickFalse;
6375  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6376  {
6377  p->primitive=primitive_info->primitive;
6378  p--;
6379  }
6380  points=(PointInfo *) RelinquishMagickMemory(points);
6381  coefficients=(double *) RelinquishMagickMemory(coefficients);
6382  return(MagickTrue);
6383 }
6384 
6385 static MagickBooleanType TraceCircle(MVGInfo *mvg_info,const PointInfo start,
6386  const PointInfo end)
6387 {
6388  double
6389  alpha,
6390  beta,
6391  radius;
6392 
6393  PointInfo
6394  offset,
6395  degrees;
6396 
6397  alpha=end.x-start.x;
6398  beta=end.y-start.y;
6399  radius=hypot((double) alpha,(double) beta);
6400  offset.x=(double) radius;
6401  offset.y=(double) radius;
6402  degrees.x=0.0;
6403  degrees.y=360.0;
6404  return(TraceEllipse(mvg_info,start,offset,degrees));
6405 }
6406 
6407 static MagickBooleanType TraceEllipse(MVGInfo *mvg_info,const PointInfo center,
6408  const PointInfo radii,const PointInfo arc)
6409 {
6410  double
6411  coordinates,
6412  delta,
6413  step,
6414  x,
6415  y;
6416 
6417  PointInfo
6418  angle,
6419  point;
6420 
6422  *primitive_info;
6423 
6425  *p;
6426 
6427  ssize_t
6428  i;
6429 
6430  /*
6431  Ellipses are just short segmented polys.
6432  */
6433  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6434  primitive_info->coordinates=0;
6435  if ((fabs(radii.x) < MagickEpsilon) || (fabs(radii.y) < MagickEpsilon))
6436  return(MagickTrue);
6437  delta=2.0*PerceptibleReciprocal(MagickMax(radii.x,radii.y));
6438  step=MagickPI/8.0;
6439  if ((delta >= 0.0) && (delta < (MagickPI/8.0)))
6440  step=MagickPI/4.0/(MagickPI*PerceptibleReciprocal(delta)/2.0);
6441  angle.x=DegreesToRadians(arc.x);
6442  y=arc.y;
6443  while (y < arc.x)
6444  y+=360.0;
6445  angle.y=DegreesToRadians(y);
6446  coordinates=ceil((angle.y-angle.x)/step+1.0);
6447  if (CheckPrimitiveExtent(mvg_info,coordinates+1) == MagickFalse)
6448  return(MagickFalse);
6449  i=0;
6450  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6451  for (p=primitive_info; angle.x < angle.y; angle.x+=step)
6452  {
6453  point.x=cos(fmod(angle.x,DegreesToRadians(360.0)))*radii.x+center.x;
6454  point.y=sin(fmod(angle.x,DegreesToRadians(360.0)))*radii.y+center.y;
6455  if (i++ >= (ssize_t) coordinates)
6456  break;
6457  if (TracePoint(p,point) == MagickFalse)
6458  return(MagickFalse);
6459  p+=p->coordinates;
6460  }
6461  point.x=cos(fmod(angle.y,DegreesToRadians(360.0)))*radii.x+center.x;
6462  point.y=sin(fmod(angle.y,DegreesToRadians(360.0)))*radii.y+center.y;
6463  if (TracePoint(p,point) == MagickFalse)
6464  return(MagickFalse);
6465  p+=p->coordinates;
6466  primitive_info->coordinates=(size_t) (p-primitive_info);
6467  primitive_info->closed_subpath=MagickFalse;
6468  x=fabs(primitive_info[0].point.x-
6469  primitive_info[primitive_info->coordinates-1].point.x);
6470  y=fabs(primitive_info[0].point.y-
6471  primitive_info[primitive_info->coordinates-1].point.y);
6472  if ((x < MagickEpsilon) && (y < MagickEpsilon))
6473  primitive_info->closed_subpath=MagickTrue;
6474  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
6475  {
6476  p->primitive=primitive_info->primitive;
6477  p--;
6478  }
6479  return(MagickTrue);
6480 }
6481 
6482 static MagickBooleanType TraceLine(PrimitiveInfo *primitive_info,
6483  const PointInfo start,const PointInfo end)
6484 {
6485  if (TracePoint(primitive_info,start) == MagickFalse)
6486  return(MagickFalse);
6487  if (TracePoint(primitive_info+1,end) == MagickFalse)
6488  return(MagickFalse);
6489  (primitive_info+1)->primitive=primitive_info->primitive;
6490  primitive_info->coordinates=2;
6491  primitive_info->closed_subpath=MagickFalse;
6492  return(MagickTrue);
6493 }
6494 
6495 static ssize_t TracePath(Image *image,MVGInfo *mvg_info,const char *path)
6496 {
6497  char
6498  *next_token,
6499  token[MaxTextExtent] = "";
6500 
6501  const char
6502  *p;
6503 
6504  double
6505  x,
6506  y;
6507 
6508  int
6509  attribute,
6510  last_attribute;
6511 
6512  MagickStatusType
6513  status;
6514 
6515  PointInfo
6516  end = {0.0, 0.0},
6517  points[4] = { {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0} },
6518  point = {0.0, 0.0},
6519  start = {0.0, 0.0};
6520 
6522  *primitive_info;
6523 
6524  PrimitiveType
6525  primitive_type;
6526 
6528  *q;
6529 
6530  ssize_t
6531  i;
6532 
6533  size_t
6534  number_coordinates,
6535  z_count;
6536 
6537  ssize_t
6538  subpath_offset;
6539 
6540  subpath_offset=mvg_info->offset;
6541  primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
6542  status=MagickTrue;
6543  attribute=0;
6544  number_coordinates=0;
6545  z_count=0;
6546  *token='\0';
6547  primitive_type=primitive_info->primitive;
6548  q=primitive_info;
6549  for (p=path; *p != '\0'; )
6550  {
6551  if (status == MagickFalse)
6552  break;
6553  while (isspace((int) ((unsigned char) *p)) != 0)
6554  p++;
6555  if (*p == '\0')
6556  break;
6557  last_attribute=attribute;
6558  attribute=(int) (*p++);
6559  switch (attribute)
6560  {
6561  case 'a':
6562  case 'A':
6563  {
6564  double
6565  angle = 0.0;
6566 
6567  MagickBooleanType
6568  large_arc = MagickFalse,
6569  sweep = MagickFalse;
6570 
6571  PointInfo
6572  arc = {0.0, 0.0};
6573 
6574  /*
6575  Elliptical arc.
6576  */
6577  do
6578  {
6579  (void) GetNextToken(p,&p,MaxTextExtent,token);
6580  if (*token == ',')
6581  (void) GetNextToken(p,&p,MaxTextExtent,token);
6582  arc.x=GetDrawValue(token,&next_token);
6583  if (token == next_token)
6584  ThrowPointExpectedException(image,token);
6585  (void) GetNextToken(p,&p,MaxTextExtent,token);
6586  if (*token == ',')
6587  (void) GetNextToken(p,&p,MaxTextExtent,token);
6588  arc.y=GetDrawValue(token,&next_token);
6589  if (token == next_token)
6590  ThrowPointExpectedException(image,token);
6591  (void) GetNextToken(p,&p,MaxTextExtent,token);
6592  if (*token == ',')
6593  (void) GetNextToken(p,&p,MaxTextExtent,token);
6594  angle=GetDrawValue(token,&next_token);
6595  if (token == next_token)
6596  ThrowPointExpectedException(image,token);
6597  (void) GetNextToken(p,&p,MaxTextExtent,token);
6598  if (*token == ',')
6599  (void) GetNextToken(p,&p,MaxTextExtent,token);
6600  large_arc=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
6601  (void) GetNextToken(p,&p,MaxTextExtent,token);
6602  if (*token == ',')
6603  (void) GetNextToken(p,&p,MaxTextExtent,token);
6604  sweep=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
6605  if (*token == ',')
6606  (void) GetNextToken(p,&p,MaxTextExtent,token);
6607  (void) GetNextToken(p,&p,MaxTextExtent,token);
6608  if (*token == ',')
6609  (void) GetNextToken(p,&p,MaxTextExtent,token);
6610  x=GetDrawValue(token,&next_token);
6611  if (token == next_token)
6612  ThrowPointExpectedException(image,token);
6613  (void) GetNextToken(p,&p,MaxTextExtent,token);
6614  if (*token == ',')
6615  (void) GetNextToken(p,&p,MaxTextExtent,token);
6616  y=GetDrawValue(token,&next_token);
6617  if (token == next_token)
6618  ThrowPointExpectedException(image,token);
6619  end.x=(double) (attribute == (int) 'A' ? x : point.x+x);
6620  end.y=(double) (attribute == (int) 'A' ? y : point.y+y);
6621  status&=TraceArcPath(mvg_info,point,end,arc,angle,large_arc,sweep);
6622  q=(*mvg_info->primitive_info)+mvg_info->offset;
6623  mvg_info->offset+=q->coordinates;
6624  q+=q->coordinates;
6625  point=end;
6626  while (isspace((int) ((unsigned char) *p)) != 0)
6627  p++;
6628  if (*p == ',')
6629  p++;
6630  } while (IsPoint(p) != MagickFalse);
6631  break;
6632  }
6633  case 'c':
6634  case 'C':
6635  {
6636  /*
6637  Cubic Bézier curve.
6638  */
6639  do
6640  {
6641  points[0]=point;
6642  for (i=1; i < 4; i++)
6643  {
6644  (void) GetNextToken(p,&p,MaxTextExtent,token);
6645  if (*token == ',')
6646  (void) GetNextToken(p,&p,MaxTextExtent,token);
6647  x=GetDrawValue(token,&next_token);
6648  if (token == next_token)
6649  ThrowPointExpectedException(image,token);
6650  (void) GetNextToken(p,&p,MaxTextExtent,token);
6651  if (*token == ',')
6652  (void) GetNextToken(p,&p,MaxTextExtent,token);
6653  y=GetDrawValue(token,&next_token);
6654  if (token == next_token)
6655  ThrowPointExpectedException(image,token);
6656  end.x=(double) (attribute == (int) 'C' ? x : point.x+x);
6657  end.y=(double) (attribute == (int) 'C' ? y : point.y+y);
6658  points[i]=end;
6659  }
6660  for (i=0; i < 4; i++)
6661  (q+i)->point=points[i];
6662  if (TraceBezier(mvg_info,4) == MagickFalse)
6663  return(-1);
6664  q=(*mvg_info->primitive_info)+mvg_info->offset;
6665  mvg_info->offset+=q->coordinates;
6666  q+=q->coordinates;
6667  point=end;
6668  while (isspace((int) ((unsigned char) *p)) != 0)
6669  p++;
6670  if (*p == ',')
6671  p++;
6672  } while (IsPoint(p) != MagickFalse);
6673  break;
6674  }
6675  case 'H':
6676  case 'h':
6677  {
6678  do
6679  {
6680  (void) GetNextToken(p,&p,MaxTextExtent,token);
6681  if (*token == ',')
6682  (void) GetNextToken(p,&p,MaxTextExtent,token);
6683  x=GetDrawValue(token,&next_token);
6684  if (token == next_token)
6685  ThrowPointExpectedException(image,token);
6686  point.x=(double) (attribute == (int) 'H' ? x: point.x+x);
6687  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6688  return(-1);
6689  q=(*mvg_info->primitive_info)+mvg_info->offset;
6690  if (TracePoint(q,point) == MagickFalse)
6691  return(-1);
6692  mvg_info->offset+=q->coordinates;
6693  q+=q->coordinates;
6694  while (isspace((int) ((unsigned char) *p)) != 0)
6695  p++;
6696  if (*p == ',')
6697  p++;
6698  } while (IsPoint(p) != MagickFalse);
6699  break;
6700  }
6701  case 'l':
6702  case 'L':
6703  {
6704  /*
6705  Line to.
6706  */
6707  do
6708  {
6709  (void) GetNextToken(p,&p,MaxTextExtent,token);
6710  if (*token == ',')
6711  (void) GetNextToken(p,&p,MaxTextExtent,token);
6712  x=GetDrawValue(token,&next_token);
6713  if (token == next_token)
6714  ThrowPointExpectedException(image,token);
6715  (void) GetNextToken(p,&p,MaxTextExtent,token);
6716  if (*token == ',')
6717  (void) GetNextToken(p,&p,MaxTextExtent,token);
6718  y=GetDrawValue(token,&next_token);
6719  if (token == next_token)
6720  ThrowPointExpectedException(image,token);
6721  point.x=(double) (attribute == (int) 'L' ? x : point.x+x);
6722  point.y=(double) (attribute == (int) 'L' ? y : point.y+y);
6723  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6724  return(-1);
6725  q=(*mvg_info->primitive_info)+mvg_info->offset;
6726  if (TracePoint(q,point) == MagickFalse)
6727  return(-1);
6728  mvg_info->offset+=q->coordinates;
6729  q+=q->coordinates;
6730  while (isspace((int) ((unsigned char) *p)) != 0)
6731  p++;
6732  if (*p == ',')
6733  p++;
6734  } while (IsPoint(p) != MagickFalse);
6735  break;
6736  }
6737  case 'M':
6738  case 'm':
6739  {
6740  /*
6741  Move to.
6742  */
6743  if (mvg_info->offset != subpath_offset)
6744  {
6745  primitive_info=(*mvg_info->primitive_info)+subpath_offset;
6746  primitive_info->coordinates=(size_t) (q-primitive_info);
6747  number_coordinates+=primitive_info->coordinates;
6748  primitive_info=q;
6749  subpath_offset=mvg_info->offset;
6750  }
6751  i=0;
6752  do
6753  {
6754  (void) GetNextToken(p,&p,MaxTextExtent,token);
6755  if (*token == ',')
6756  (void) GetNextToken(p,&p,MaxTextExtent,token);
6757  x=GetDrawValue(token,&next_token);
6758  if (token == next_token)
6759  ThrowPointExpectedException(image,token);
6760  (void) GetNextToken(p,&p,MaxTextExtent,token);
6761  if (*token == ',')
6762  (void) GetNextToken(p,&p,MaxTextExtent,token);
6763  y=GetDrawValue(token,&next_token);
6764  if (token == next_token)
6765  ThrowPointExpectedException(image,token);
6766  point.x=(double) (attribute == (int) 'M' ? x : point.x+x);
6767  point.y=(double) (attribute == (int) 'M' ? y : point.y+y);
6768  if (i == 0)
6769  start=point;
6770  i++;
6771  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6772  return(-1);
6773  q=(*mvg_info->primitive_info)+mvg_info->offset;
6774  if (TracePoint(q,point) == MagickFalse)
6775  return(-1);
6776  mvg_info->offset+=q->coordinates;
6777  q+=q->coordinates;
6778  while (isspace((int) ((unsigned char) *p)) != 0)
6779  p++;
6780  if (*p == ',')
6781  p++;
6782  } while (IsPoint(p) != MagickFalse);
6783  break;
6784  }
6785  case 'q':
6786  case 'Q':
6787  {
6788  /*
6789  Quadratic Bézier curve.
6790  */
6791  do
6792  {
6793  points[0]=point;
6794  for (i=1; i < 3; i++)
6795  {
6796  (void) GetNextToken(p,&p,MaxTextExtent,token);
6797  if (*token == ',')
6798  (void) GetNextToken(p,&p,MaxTextExtent,token);
6799  x=GetDrawValue(token,&next_token);
6800  if (token == next_token)
6801  ThrowPointExpectedException(image,token);
6802  (void) GetNextToken(p,&p,MaxTextExtent,token);
6803  if (*token == ',')
6804  (void) GetNextToken(p,&p,MaxTextExtent,token);
6805  y=GetDrawValue(token,&next_token);
6806  if (token == next_token)
6807  ThrowPointExpectedException(image,token);
6808  if (*p == ',')
6809  p++;
6810  end.x=(double) (attribute == (int) 'Q' ? x : point.x+x);
6811  end.y=(double) (attribute == (int) 'Q' ? y : point.y+y);
6812  points[i]=end;
6813  }
6814  for (i=0; i < 3; i++)
6815  (q+i)->point=points[i];
6816  if (TraceBezier(mvg_info,3) == MagickFalse)
6817  return(-1);
6818  q=(*mvg_info->primitive_info)+mvg_info->offset;
6819  mvg_info->offset+=q->coordinates;
6820  q+=q->coordinates;
6821  point=end;
6822  while (isspace((int) ((unsigned char) *p)) != 0)
6823  p++;
6824  if (*p == ',')
6825  p++;
6826  } while (IsPoint(p) != MagickFalse);
6827  break;
6828  }
6829  case 's':
6830  case 'S':
6831  {
6832  /*
6833  Cubic Bézier curve.
6834  */
6835  do
6836  {
6837  points[0]=points[3];
6838  points[1].x=2.0*points[3].x-points[2].x;
6839  points[1].y=2.0*points[3].y-points[2].y;
6840  for (i=2; i < 4; i++)
6841  {
6842  (void) GetNextToken(p,&p,MaxTextExtent,token);
6843  if (*token == ',')
6844  (void) GetNextToken(p,&p,MaxTextExtent,token);
6845  x=GetDrawValue(token,&next_token);
6846  if (token == next_token)
6847  ThrowPointExpectedException(image,token);
6848  (void) GetNextToken(p,&p,MaxTextExtent,token);
6849  if (*token == ',')
6850  (void) GetNextToken(p,&p,MaxTextExtent,token);
6851  y=GetDrawValue(token,&next_token);
6852  if (token == next_token)
6853  ThrowPointExpectedException(image,token);
6854  if (*p == ',')
6855  p++;
6856  end.x=(double) (attribute == (int) 'S' ? x : point.x+x);
6857  end.y=(double) (attribute == (int) 'S' ? y : point.y+y);
6858  points[i]=end;
6859  }
6860  if (strchr("CcSs",last_attribute) == (char *) NULL)
6861  {
6862  points[0]=point;
6863  points[1]=point;
6864  }
6865  for (i=0; i < 4; i++)
6866  (q+i)->point=points[i];
6867  if (TraceBezier(mvg_info,4) == MagickFalse)
6868  return(-1);
6869  q=(*mvg_info->primitive_info)+mvg_info->offset;
6870  mvg_info->offset+=q->coordinates;
6871  q+=q->coordinates;
6872  point=end;
6873  last_attribute=attribute;
6874  while (isspace((int) ((unsigned char) *p)) != 0)
6875  p++;
6876  if (*p == ',')
6877  p++;
6878  } while (IsPoint(p) != MagickFalse);
6879  break;
6880  }
6881  case 't':
6882  case 'T':
6883  {
6884  /*
6885  Quadratic Bézier curve.
6886  */
6887  do
6888  {
6889  points[0]=points[2];
6890  points[1].x=2.0*points[2].x-points[1].x;
6891  points[1].y=2.0*points[2].y-points[1].y;
6892  for (i=2; i < 3; i++)
6893  {
6894  (void) GetNextToken(p,&p,MaxTextExtent,token);
6895  if (*token == ',')
6896  (void) GetNextToken(p,&p,MaxTextExtent,token);
6897  x=GetDrawValue(token,&next_token);
6898  if (token == next_token)
6899  ThrowPointExpectedException(image,token);
6900  (void) GetNextToken(p,&p,MaxTextExtent,token);
6901  if (*token == ',')
6902  (void) GetNextToken(p,&p,MaxTextExtent,token);
6903  y=GetDrawValue(token,&next_token);
6904  if (token == next_token)
6905  ThrowPointExpectedException(image,token);
6906  end.x=(double) (attribute == (int) 'T' ? x : point.x+x);
6907  end.y=(double) (attribute == (int) 'T' ? y : point.y+y);
6908  points[i]=end;
6909  }
6910  if (status == MagickFalse)
6911  break;
6912  if (strchr("QqTt",last_attribute) == (char *) NULL)
6913  {
6914  points[0]=point;
6915  points[1]=point;
6916  }
6917  for (i=0; i < 3; i++)
6918  (q+i)->point=points[i];
6919  if (TraceBezier(mvg_info,3) == MagickFalse)
6920  return(-1);
6921  q=(*mvg_info->primitive_info)+mvg_info->offset;
6922  mvg_info->offset+=q->coordinates;
6923  q+=q->coordinates;
6924  point=end;
6925  last_attribute=attribute;
6926  while (isspace((int) ((unsigned char) *p)) != 0)
6927  p++;
6928  if (*p == ',')
6929  p++;
6930  } while (IsPoint(p) != MagickFalse);
6931  break;
6932  }
6933  case 'v':
6934  case 'V':
6935  {
6936  /*
6937  Line to.
6938  */
6939  do
6940  {
6941  (void) GetNextToken(p,&p,MaxTextExtent,token);
6942  if (*token == ',')
6943  (void) GetNextToken(p,&p,MaxTextExtent,token);
6944  y=GetDrawValue(token,&next_token);
6945  if (token == next_token)
6946  ThrowPointExpectedException(image,token);
6947  point.y=(double) (attribute == (int) 'V' ? y : point.y+y);
6948  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6949  return(-1);
6950  q=(*mvg_info->primitive_info)+mvg_info->offset;
6951  if (TracePoint(q,point) == MagickFalse)
6952  return(-1);
6953  mvg_info->offset+=q->coordinates;
6954  q+=q->coordinates;
6955  while (isspace((int) ((unsigned char) *p)) != 0)
6956  p++;
6957  if (*p == ',')
6958  p++;
6959  } while (IsPoint(p) != MagickFalse);
6960  break;
6961  }
6962  case 'z':
6963  case 'Z':
6964  {
6965  /*
6966  Close path.
6967  */
6968  point=start;
6969  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
6970  return(-1);
6971  q=(*mvg_info->primitive_info)+mvg_info->offset;
6972  if (TracePoint(q,point) == MagickFalse)
6973  return(-1);
6974  mvg_info->offset+=q->coordinates;
6975  q+=q->coordinates;
6976  primitive_info=(*mvg_info->primitive_info)+subpath_offset;
6977  primitive_info->coordinates=(size_t) (q-primitive_info);
6978  primitive_info->closed_subpath=MagickTrue;
6979  number_coordinates+=primitive_info->coordinates;
6980  primitive_info=q;
6981  subpath_offset=mvg_info->offset;
6982  z_count++;
6983  break;
6984  }
6985  default:
6986  {
6987  ThrowPointExpectedException(image,token);
6988  break;
6989  }
6990  }
6991  }
6992  if (status == MagickFalse)
6993  return(-1);
6994  primitive_info=(*mvg_info->primitive_info)+subpath_offset;
6995  primitive_info->coordinates=(size_t) (q-primitive_info);
6996  number_coordinates+=primitive_info->coordinates;
6997  for (i=0; i < (ssize_t) number_coordinates; i++)
6998  {
6999  q--;
7000  q->primitive=primitive_type;
7001  if (z_count > 1)
7002  q->method=FillToBorderMethod;
7003  }
7004  q=primitive_info;
7005  return((ssize_t) number_coordinates);
7006 }
7007 
7008 static MagickBooleanType TraceRectangle(PrimitiveInfo *primitive_info,
7009  const PointInfo start,const PointInfo end)
7010 {
7011  PointInfo
7012  point;
7013 
7015  *p;
7016 
7017  ssize_t
7018  i;
7019 
7020  p=primitive_info;
7021  if (TracePoint(p,start) == MagickFalse)
7022  return(MagickFalse);
7023  p+=p->coordinates;
7024  point.x=start.x;
7025  point.y=end.y;
7026  if (TracePoint(p,point) == MagickFalse)
7027  return(MagickFalse);
7028  p+=p->coordinates;
7029  if (TracePoint(p,end) == MagickFalse)
7030  return(MagickFalse);
7031  p+=p->coordinates;
7032  point.x=end.x;
7033  point.y=start.y;
7034  if (TracePoint(p,point) == MagickFalse)
7035  return(MagickFalse);
7036  p+=p->coordinates;
7037  if (TracePoint(p,start) == MagickFalse)
7038  return(MagickFalse);
7039  p+=p->coordinates;
7040  primitive_info->coordinates=(size_t) (p-primitive_info);
7041  primitive_info->closed_subpath=MagickTrue;
7042  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
7043  {
7044  p->primitive=primitive_info->primitive;
7045  p--;
7046  }
7047  return(MagickTrue);
7048 }
7049 
7050 static MagickBooleanType TraceRoundRectangle(MVGInfo *mvg_info,
7051  const PointInfo start,const PointInfo end,PointInfo arc)
7052 {
7053  PointInfo
7054  degrees,
7055  point,
7056  segment;
7057 
7059  *primitive_info;
7060 
7062  *p;
7063 
7064  ssize_t
7065  i;
7066 
7067  ssize_t
7068  offset;
7069 
7070  offset=mvg_info->offset;
7071  segment.x=fabs(end.x-start.x);
7072  segment.y=fabs(end.y-start.y);
7073  if ((segment.x < MagickEpsilon) || (segment.y < MagickEpsilon))
7074  {
7075  (*mvg_info->primitive_info+mvg_info->offset)->coordinates=0;
7076  return(MagickTrue);
7077  }
7078  if (arc.x > (0.5*segment.x))
7079  arc.x=0.5*segment.x;
7080  if (arc.y > (0.5*segment.y))
7081  arc.y=0.5*segment.y;
7082  point.x=start.x+segment.x-arc.x;
7083  point.y=start.y+arc.y;
7084  degrees.x=270.0;
7085  degrees.y=360.0;
7086  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7087  return(MagickFalse);
7088  p=(*mvg_info->primitive_info)+mvg_info->offset;
7089  mvg_info->offset+=p->coordinates;
7090  point.x=start.x+segment.x-arc.x;
7091  point.y=start.y+segment.y-arc.y;
7092  degrees.x=0.0;
7093  degrees.y=90.0;
7094  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7095  return(MagickFalse);
7096  p=(*mvg_info->primitive_info)+mvg_info->offset;
7097  mvg_info->offset+=p->coordinates;
7098  point.x=start.x+arc.x;
7099  point.y=start.y+segment.y-arc.y;
7100  degrees.x=90.0;
7101  degrees.y=180.0;
7102  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7103  return(MagickFalse);
7104  p=(*mvg_info->primitive_info)+mvg_info->offset;
7105  mvg_info->offset+=p->coordinates;
7106  point.x=start.x+arc.x;
7107  point.y=start.y+arc.y;
7108  degrees.x=180.0;
7109  degrees.y=270.0;
7110  if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
7111  return(MagickFalse);
7112  p=(*mvg_info->primitive_info)+mvg_info->offset;
7113  mvg_info->offset+=p->coordinates;
7114  if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
7115  return(MagickFalse);
7116  p=(*mvg_info->primitive_info)+mvg_info->offset;
7117  if (TracePoint(p,(*mvg_info->primitive_info+offset)->point) == MagickFalse)
7118  return(MagickFalse);
7119  p+=p->coordinates;
7120  mvg_info->offset=offset;
7121  primitive_info=(*mvg_info->primitive_info)+offset;
7122  primitive_info->coordinates=(size_t) (p-primitive_info);
7123  primitive_info->closed_subpath=MagickTrue;
7124  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
7125  {
7126  p->primitive=primitive_info->primitive;
7127  p--;
7128  }
7129  return(MagickTrue);
7130 }
7131 
7132 static MagickBooleanType TraceSquareLinecap(PrimitiveInfo *primitive_info,
7133  const size_t number_vertices,const double offset)
7134 {
7135  double
7136  distance;
7137 
7138  double
7139  dx,
7140  dy;
7141 
7142  ssize_t
7143  i;
7144 
7145  ssize_t
7146  j;
7147 
7148  dx=0.0;
7149  dy=0.0;
7150  for (i=1; i < (ssize_t) number_vertices; i++)
7151  {
7152  dx=primitive_info[0].point.x-primitive_info[i].point.x;
7153  dy=primitive_info[0].point.y-primitive_info[i].point.y;
7154  if ((fabs((double) dx) >= MagickEpsilon) ||
7155  (fabs((double) dy) >= MagickEpsilon))
7156  break;
7157  }
7158  if (i == (ssize_t) number_vertices)
7159  i=(ssize_t) number_vertices-1L;
7160  distance=hypot((double) dx,(double) dy);
7161  primitive_info[0].point.x=(double) (primitive_info[i].point.x+
7162  dx*(distance+offset)/distance);
7163  primitive_info[0].point.y=(double) (primitive_info[i].point.y+
7164  dy*(distance+offset)/distance);
7165  for (j=(ssize_t) number_vertices-2; j >= 0; j--)
7166  {
7167  dx=primitive_info[number_vertices-1].point.x-primitive_info[j].point.x;
7168  dy=primitive_info[number_vertices-1].point.y-primitive_info[j].point.y;
7169  if ((fabs((double) dx) >= MagickEpsilon) ||
7170  (fabs((double) dy) >= MagickEpsilon))
7171  break;
7172  }
7173  distance=hypot((double) dx,(double) dy);
7174  primitive_info[number_vertices-1].point.x=(double) (primitive_info[j].point.x+
7175  dx*(distance+offset)/distance);
7176  primitive_info[number_vertices-1].point.y=(double) (primitive_info[j].point.y+
7177  dy*(distance+offset)/distance);
7178  return(MagickTrue);
7179 }
7180 
7181 static PrimitiveInfo *TraceStrokePolygon(const DrawInfo *draw_info,
7182  const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
7183 {
7184 #define MaxStrokePad (6*BezierQuantum+360)
7185 #define CheckPathExtent(pad_p,pad_q) \
7186 { \
7187  if ((pad_p) > MaxBezierCoordinates) \
7188  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7189  else \
7190  if ((ssize_t) (p+(pad_p)) >= (ssize_t) extent_p) \
7191  { \
7192  if (~extent_p < (pad_p)) \
7193  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7194  else \
7195  { \
7196  extent_p+=(pad_p); \
7197  stroke_p=(PointInfo *) ResizeQuantumMemory(stroke_p,extent_p+ \
7198  MaxStrokePad,sizeof(*stroke_p)); \
7199  } \
7200  } \
7201  if ((pad_q) > MaxBezierCoordinates) \
7202  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7203  else \
7204  if ((ssize_t) (q+(pad_q)) >= (ssize_t) extent_q) \
7205  { \
7206  if (~extent_q < (pad_q)) \
7207  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7208  else \
7209  { \
7210  extent_q+=(pad_q); \
7211  stroke_q=(PointInfo *) ResizeQuantumMemory(stroke_q,extent_q+ \
7212  MaxStrokePad,sizeof(*stroke_q)); \
7213  } \
7214  } \
7215  if ((stroke_p == (PointInfo *) NULL) || (stroke_q == (PointInfo *) NULL)) \
7216  { \
7217  if (stroke_p != (PointInfo *) NULL) \
7218  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p); \
7219  if (stroke_q != (PointInfo *) NULL) \
7220  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q); \
7221  polygon_primitive=(PrimitiveInfo *) \
7222  RelinquishMagickMemory(polygon_primitive); \
7223  (void) ThrowMagickException(exception,GetMagickModule(), \
7224  ResourceLimitError,"MemoryAllocationFailed","`%s'",""); \
7225  return((PrimitiveInfo *) NULL); \
7226  } \
7227 }
7228 
7229  typedef struct _StrokeSegment
7230  {
7231  double
7232  p,
7233  q;
7234  } StrokeSegment;
7235 
7236  double
7237  delta_theta,
7238  dot_product,
7239  mid,
7240  miterlimit;
7241 
7242  MagickBooleanType
7243  closed_path;
7244 
7245  PointInfo
7246  box_p[5],
7247  box_q[5],
7248  center,
7249  offset,
7250  *stroke_p,
7251  *stroke_q;
7252 
7254  *polygon_primitive,
7255  *stroke_polygon;
7256 
7257  ssize_t
7258  i;
7259 
7260  size_t
7261  arc_segments,
7262  extent_p,
7263  extent_q,
7264  number_vertices;
7265 
7266  ssize_t
7267  j,
7268  n,
7269  p,
7270  q;
7271 
7272  StrokeSegment
7273  dx = {0.0, 0.0},
7274  dy = {0.0, 0.0},
7275  inverse_slope = {0.0, 0.0},
7276  slope = {0.0, 0.0},
7277  theta = {0.0, 0.0};
7278 
7279  /*
7280  Allocate paths.
7281  */
7282  number_vertices=primitive_info->coordinates;
7283  polygon_primitive=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
7284  number_vertices+2UL,sizeof(*polygon_primitive));
7285  if (polygon_primitive == (PrimitiveInfo *) NULL)
7286  {
7287  (void) ThrowMagickException(exception,GetMagickModule(),
7288  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7289  return((PrimitiveInfo *) NULL);
7290  }
7291  (void) memcpy(polygon_primitive,primitive_info,(size_t) number_vertices*
7292  sizeof(*polygon_primitive));
7293  offset.x=primitive_info[number_vertices-1].point.x-primitive_info[0].point.x;
7294  offset.y=primitive_info[number_vertices-1].point.y-primitive_info[0].point.y;
7295  closed_path=(fabs(offset.x) < MagickEpsilon) &&
7296  (fabs(offset.y) < MagickEpsilon) ? MagickTrue : MagickFalse;
7297  if (((draw_info->linejoin == RoundJoin) ||
7298  (draw_info->linejoin == MiterJoin)) && (closed_path != MagickFalse))
7299  {
7300  polygon_primitive[number_vertices]=primitive_info[1];
7301  number_vertices++;
7302  }
7303  polygon_primitive[number_vertices].primitive=UndefinedPrimitive;
7304  /*
7305  Compute the slope for the first line segment, p.
7306  */
7307  dx.p=0.0;
7308  dy.p=0.0;
7309  for (n=1; n < (ssize_t) number_vertices; n++)
7310  {
7311  dx.p=polygon_primitive[n].point.x-polygon_primitive[0].point.x;
7312  dy.p=polygon_primitive[n].point.y-polygon_primitive[0].point.y;
7313  if ((fabs(dx.p) >= MagickEpsilon) || (fabs(dy.p) >= MagickEpsilon))
7314  break;
7315  }
7316  if (n == (ssize_t) number_vertices)
7317  {
7318  if ((draw_info->linecap != RoundCap) || (closed_path != MagickFalse))
7319  {
7320  /*
7321  Zero length subpath.
7322  */
7323  stroke_polygon=(PrimitiveInfo *) AcquireCriticalMemory(
7324  sizeof(*stroke_polygon));
7325  stroke_polygon[0]=polygon_primitive[0];
7326  stroke_polygon[0].coordinates=0;
7327  polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
7328  polygon_primitive);
7329  return(stroke_polygon);
7330  }
7331  n=(ssize_t) number_vertices-1L;
7332  }
7333  extent_p=2*number_vertices;
7334  extent_q=2*number_vertices;
7335  stroke_p=(PointInfo *) AcquireQuantumMemory((size_t) extent_p+MaxStrokePad,
7336  sizeof(*stroke_p));
7337  stroke_q=(PointInfo *) AcquireQuantumMemory((size_t) extent_q+MaxStrokePad,
7338  sizeof(*stroke_q));
7339  if ((stroke_p == (PointInfo *) NULL) || (stroke_q == (PointInfo *) NULL))
7340  {
7341  if (stroke_p != (PointInfo *) NULL)
7342  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7343  if (stroke_q != (PointInfo *) NULL)
7344  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7345  polygon_primitive=(PrimitiveInfo *)
7346  RelinquishMagickMemory(polygon_primitive);
7347  (void) ThrowMagickException(exception,GetMagickModule(),
7348  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7349  return((PrimitiveInfo *) NULL);
7350  }
7351  slope.p=0.0;
7352  inverse_slope.p=0.0;
7353  if (fabs(dx.p) < MagickEpsilon)
7354  {
7355  if (dx.p >= 0.0)
7356  slope.p=dy.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7357  else
7358  slope.p=dy.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7359  }
7360  else
7361  if (fabs(dy.p) < MagickEpsilon)
7362  {
7363  if (dy.p >= 0.0)
7364  inverse_slope.p=dx.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7365  else
7366  inverse_slope.p=dx.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7367  }
7368  else
7369  {
7370  slope.p=dy.p/dx.p;
7371  inverse_slope.p=(-1.0*PerceptibleReciprocal(slope.p));
7372  }
7373  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
7374  miterlimit=(double) (draw_info->miterlimit*draw_info->miterlimit*mid*mid);
7375  if ((draw_info->linecap == SquareCap) && (closed_path == MagickFalse))
7376  (void) TraceSquareLinecap(polygon_primitive,number_vertices,mid);
7377  offset.x=sqrt((double) (mid*mid/(inverse_slope.p*inverse_slope.p+1.0)));
7378  offset.y=(double) (offset.x*inverse_slope.p);
7379  if ((dy.p*offset.x-dx.p*offset.y) > 0.0)
7380  {
7381  box_p[0].x=polygon_primitive[0].point.x-offset.x;
7382  box_p[0].y=polygon_primitive[0].point.y-offset.x*inverse_slope.p;
7383  box_p[1].x=polygon_primitive[n].point.x-offset.x;
7384  box_p[1].y=polygon_primitive[n].point.y-offset.x*inverse_slope.p;
7385  box_q[0].x=polygon_primitive[0].point.x+offset.x;
7386  box_q[0].y=polygon_primitive[0].point.y+offset.x*inverse_slope.p;
7387  box_q[1].x=polygon_primitive[n].point.x+offset.x;
7388  box_q[1].y=polygon_primitive[n].point.y+offset.x*inverse_slope.p;
7389  }
7390  else
7391  {
7392  box_p[0].x=polygon_primitive[0].point.x+offset.x;
7393  box_p[0].y=polygon_primitive[0].point.y+offset.y;
7394  box_p[1].x=polygon_primitive[n].point.x+offset.x;
7395  box_p[1].y=polygon_primitive[n].point.y+offset.y;
7396  box_q[0].x=polygon_primitive[0].point.x-offset.x;
7397  box_q[0].y=polygon_primitive[0].point.y-offset.y;
7398  box_q[1].x=polygon_primitive[n].point.x-offset.x;
7399  box_q[1].y=polygon_primitive[n].point.y-offset.y;
7400  }
7401  /*
7402  Create strokes for the line join attribute: bevel, miter, round.
7403  */
7404  p=0;
7405  q=0;
7406  stroke_q[p++]=box_q[0];
7407  stroke_p[q++]=box_p[0];
7408  for (i=(ssize_t) n+1; i < (ssize_t) number_vertices; i++)
7409  {
7410  /*
7411  Compute the slope for this line segment, q.
7412  */
7413  dx.q=polygon_primitive[i].point.x-polygon_primitive[n].point.x;
7414  dy.q=polygon_primitive[i].point.y-polygon_primitive[n].point.y;
7415  dot_product=dx.q*dx.q+dy.q*dy.q;
7416  if (dot_product < 0.25)
7417  continue;
7418  slope.q=0.0;
7419  inverse_slope.q=0.0;
7420  if (fabs(dx.q) < MagickEpsilon)
7421  {
7422  if (dx.q >= 0.0)
7423  slope.q=dy.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7424  else
7425  slope.q=dy.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7426  }
7427  else
7428  if (fabs(dy.q) < MagickEpsilon)
7429  {
7430  if (dy.q >= 0.0)
7431  inverse_slope.q=dx.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
7432  else
7433  inverse_slope.q=dx.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
7434  }
7435  else
7436  {
7437  slope.q=dy.q/dx.q;
7438  inverse_slope.q=(-1.0*PerceptibleReciprocal(slope.q));
7439  }
7440  offset.x=sqrt((double) (mid*mid/(inverse_slope.q*inverse_slope.q+1.0)));
7441  offset.y=(double) (offset.x*inverse_slope.q);
7442  dot_product=dy.q*offset.x-dx.q*offset.y;
7443  if (dot_product > 0.0)
7444  {
7445  box_p[2].x=polygon_primitive[n].point.x-offset.x;
7446  box_p[2].y=polygon_primitive[n].point.y-offset.y;
7447  box_p[3].x=polygon_primitive[i].point.x-offset.x;
7448  box_p[3].y=polygon_primitive[i].point.y-offset.y;
7449  box_q[2].x=polygon_primitive[n].point.x+offset.x;
7450  box_q[2].y=polygon_primitive[n].point.y+offset.y;
7451  box_q[3].x=polygon_primitive[i].point.x+offset.x;
7452  box_q[3].y=polygon_primitive[i].point.y+offset.y;
7453  }
7454  else
7455  {
7456  box_p[2].x=polygon_primitive[n].point.x+offset.x;
7457  box_p[2].y=polygon_primitive[n].point.y+offset.y;
7458  box_p[3].x=polygon_primitive[i].point.x+offset.x;
7459  box_p[3].y=polygon_primitive[i].point.y+offset.y;
7460  box_q[2].x=polygon_primitive[n].point.x-offset.x;
7461  box_q[2].y=polygon_primitive[n].point.y-offset.y;
7462  box_q[3].x=polygon_primitive[i].point.x-offset.x;
7463  box_q[3].y=polygon_primitive[i].point.y-offset.y;
7464  }
7465  if (fabs((double) (slope.p-slope.q)) < MagickEpsilon)
7466  {
7467  box_p[4]=box_p[1];
7468  box_q[4]=box_q[1];
7469  }
7470  else
7471  {
7472  box_p[4].x=(double) ((slope.p*box_p[0].x-box_p[0].y-slope.q*box_p[3].x+
7473  box_p[3].y)/(slope.p-slope.q));
7474  box_p[4].y=(double) (slope.p*(box_p[4].x-box_p[0].x)+box_p[0].y);
7475  box_q[4].x=(double) ((slope.p*box_q[0].x-box_q[0].y-slope.q*box_q[3].x+
7476  box_q[3].y)/(slope.p-slope.q));
7477  box_q[4].y=(double) (slope.p*(box_q[4].x-box_q[0].x)+box_q[0].y);
7478  }
7479  CheckPathExtent(MaxStrokePad,MaxStrokePad);
7480  dot_product=dx.q*dy.p-dx.p*dy.q;
7481  if (dot_product <= 0.0)
7482  switch (draw_info->linejoin)
7483  {
7484  case BevelJoin:
7485  {
7486  stroke_q[q++]=box_q[1];
7487  stroke_q[q++]=box_q[2];
7488  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7489  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7490  if (dot_product <= miterlimit)
7491  stroke_p[p++]=box_p[4];
7492  else
7493  {
7494  stroke_p[p++]=box_p[1];
7495  stroke_p[p++]=box_p[2];
7496  }
7497  break;
7498  }
7499  case MiterJoin:
7500  {
7501  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7502  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7503  if (dot_product <= miterlimit)
7504  {
7505  stroke_q[q++]=box_q[4];
7506  stroke_p[p++]=box_p[4];
7507  }
7508  else
7509  {
7510  stroke_q[q++]=box_q[1];
7511  stroke_q[q++]=box_q[2];
7512  stroke_p[p++]=box_p[1];
7513  stroke_p[p++]=box_p[2];
7514  }
7515  break;
7516  }
7517  case RoundJoin:
7518  {
7519  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7520  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7521  if (dot_product <= miterlimit)
7522  stroke_p[p++]=box_p[4];
7523  else
7524  {
7525  stroke_p[p++]=box_p[1];
7526  stroke_p[p++]=box_p[2];
7527  }
7528  center=polygon_primitive[n].point;
7529  theta.p=atan2(box_q[1].y-center.y,box_q[1].x-center.x);
7530  theta.q=atan2(box_q[2].y-center.y,box_q[2].x-center.x);
7531  if (theta.q < theta.p)
7532  theta.q+=2.0*MagickPI;
7533  arc_segments=(size_t) CastDoubleToLong(ceil((double) ((theta.q-
7534  theta.p)/(2.0*sqrt(PerceptibleReciprocal(mid))))));
7535  CheckPathExtent(MaxStrokePad,arc_segments+MaxStrokePad);
7536  stroke_q[q].x=box_q[1].x;
7537  stroke_q[q].y=box_q[1].y;
7538  q++;
7539  for (j=1; j < (ssize_t) arc_segments; j++)
7540  {
7541  delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
7542  stroke_q[q].x=(double) (center.x+mid*cos(fmod((double)
7543  (theta.p+delta_theta),DegreesToRadians(360.0))));
7544  stroke_q[q].y=(double) (center.y+mid*sin(fmod((double)
7545  (theta.p+delta_theta),DegreesToRadians(360.0))));
7546  q++;
7547  }
7548  stroke_q[q++]=box_q[2];
7549  break;
7550  }
7551  default:
7552  break;
7553  }
7554  else
7555  switch (draw_info->linejoin)
7556  {
7557  case BevelJoin:
7558  {
7559  stroke_p[p++]=box_p[1];
7560  stroke_p[p++]=box_p[2];
7561  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7562  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7563  if (dot_product <= miterlimit)
7564  stroke_q[q++]=box_q[4];
7565  else
7566  {
7567  stroke_q[q++]=box_q[1];
7568  stroke_q[q++]=box_q[2];
7569  }
7570  break;
7571  }
7572  case MiterJoin:
7573  {
7574  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7575  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7576  if (dot_product <= miterlimit)
7577  {
7578  stroke_q[q++]=box_q[4];
7579  stroke_p[p++]=box_p[4];
7580  }
7581  else
7582  {
7583  stroke_q[q++]=box_q[1];
7584  stroke_q[q++]=box_q[2];
7585  stroke_p[p++]=box_p[1];
7586  stroke_p[p++]=box_p[2];
7587  }
7588  break;
7589  }
7590  case RoundJoin:
7591  {
7592  dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
7593  (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
7594  if (dot_product <= miterlimit)
7595  stroke_q[q++]=box_q[4];
7596  else
7597  {
7598  stroke_q[q++]=box_q[1];
7599  stroke_q[q++]=box_q[2];
7600  }
7601  center=polygon_primitive[n].point;
7602  theta.p=atan2(box_p[1].y-center.y,box_p[1].x-center.x);
7603  theta.q=atan2(box_p[2].y-center.y,box_p[2].x-center.x);
7604  if (theta.p < theta.q)
7605  theta.p+=2.0*MagickPI;
7606  arc_segments=(size_t) CastDoubleToLong(ceil((double) ((theta.p-
7607  theta.q)/(2.0*sqrt((double) (PerceptibleReciprocal(mid)))))));
7608  CheckPathExtent(arc_segments+MaxStrokePad,MaxStrokePad);
7609  stroke_p[p++]=box_p[1];
7610  for (j=1; j < (ssize_t) arc_segments; j++)
7611  {
7612  delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
7613  stroke_p[p].x=(double) (center.x+mid*cos(fmod((double)
7614  (theta.p+delta_theta),DegreesToRadians(360.0))));
7615  stroke_p[p].y=(double) (center.y+mid*sin(fmod((double)
7616  (theta.p+delta_theta),DegreesToRadians(360.0))));
7617  p++;
7618  }
7619  stroke_p[p++]=box_p[2];
7620  break;
7621  }
7622  default:
7623  break;
7624  }
7625  slope.p=slope.q;
7626  inverse_slope.p=inverse_slope.q;
7627  box_p[0]=box_p[2];
7628  box_p[1]=box_p[3];
7629  box_q[0]=box_q[2];
7630  box_q[1]=box_q[3];
7631  dx.p=dx.q;
7632  dy.p=dy.q;
7633  n=i;
7634  }
7635  stroke_p[p++]=box_p[1];
7636  stroke_q[q++]=box_q[1];
7637  /*
7638  Trace stroked polygon.
7639  */
7640  stroke_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
7641  (p+q+2UL*closed_path+2UL),sizeof(*stroke_polygon));
7642  if (stroke_polygon == (PrimitiveInfo *) NULL)
7643  {
7644  (void) ThrowMagickException(exception,GetMagickModule(),
7645  ResourceLimitError,"MemoryAllocationFailed","`%s'","");
7646  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7647  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7648  polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
7649  polygon_primitive);
7650  return(stroke_polygon);
7651  }
7652  for (i=0; i < (ssize_t) p; i++)
7653  {
7654  stroke_polygon[i]=polygon_primitive[0];
7655  stroke_polygon[i].point=stroke_p[i];
7656  }
7657  if (closed_path != MagickFalse)
7658  {
7659  stroke_polygon[i]=polygon_primitive[0];
7660  stroke_polygon[i].point=stroke_polygon[0].point;
7661  i++;
7662  }
7663  for ( ; i < (ssize_t) (p+q+closed_path); i++)
7664  {
7665  stroke_polygon[i]=polygon_primitive[0];
7666  stroke_polygon[i].point=stroke_q[p+q+closed_path-(i+1)];
7667  }
7668  if (closed_path != MagickFalse)
7669  {
7670  stroke_polygon[i]=polygon_primitive[0];
7671  stroke_polygon[i].point=stroke_polygon[p+closed_path].point;
7672  i++;
7673  }
7674  stroke_polygon[i]=polygon_primitive[0];
7675  stroke_polygon[i].point=stroke_polygon[0].point;
7676  i++;
7677  stroke_polygon[i].primitive=UndefinedPrimitive;
7678  stroke_polygon[0].coordinates=(size_t) (p+q+2*closed_path+1);
7679  stroke_p=(PointInfo *) RelinquishMagickMemory(stroke_p);
7680  stroke_q=(PointInfo *) RelinquishMagickMemory(stroke_q);
7681  polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(polygon_primitive);
7682  return(stroke_polygon);
7683 }
Definition: image.h:134
Definition: draw.c:146