MagickCore  7.0.3
draw.c
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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 1999-2016 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 % http://www.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 "MagickCore/studio.h"
49 #include "MagickCore/annotate.h"
50 #include "MagickCore/artifact.h"
51 #include "MagickCore/blob.h"
52 #include "MagickCore/cache.h"
54 #include "MagickCore/cache-view.h"
55 #include "MagickCore/channel.h"
56 #include "MagickCore/color.h"
58 #include "MagickCore/composite.h"
60 #include "MagickCore/constitute.h"
61 #include "MagickCore/draw.h"
63 #include "MagickCore/enhance.h"
64 #include "MagickCore/exception.h"
66 #include "MagickCore/gem.h"
67 #include "MagickCore/geometry.h"
69 #include "MagickCore/list.h"
70 #include "MagickCore/log.h"
71 #include "MagickCore/monitor.h"
73 #include "MagickCore/option.h"
74 #include "MagickCore/paint.h"
77 #include "MagickCore/property.h"
78 #include "MagickCore/resample.h"
80 #include "MagickCore/resource_.h"
81 #include "MagickCore/string_.h"
84 #include "MagickCore/token.h"
86 #include "MagickCore/utility.h"
87 
88 /*
89  Define declarations.
90 */
91 #define BezierQuantum 200
92 #define DrawEpsilon (1.0e-10)
93 
94 
95 /*
96  Typedef declarations.
97 */
98 typedef struct _EdgeInfo
99 {
102 
103  double
105 
106  PointInfo
108 
109  size_t
111 
112  ssize_t
114 
117 
118  size_t
120 } EdgeInfo;
121 
122 typedef struct _ElementInfo
123 {
124  double
125  cx,
126  cy,
127  major,
128  minor,
129  angle;
130 } ElementInfo;
131 
132 typedef struct _PolygonInfo
133 {
134  EdgeInfo
136 
137  size_t
139 } PolygonInfo;
140 
141 typedef enum
142 {
148 } PathInfoCode;
149 
150 typedef struct _PathInfo
151 {
152  PointInfo
154 
157 } PathInfo;
158 
159 /*
160  Forward declarations.
161 */
162 static MagickBooleanType
163  DrawStrokePolygon(Image *,const DrawInfo *,const PrimitiveInfo *,
164  ExceptionInfo *);
165 
166 static PrimitiveInfo
167  *TraceStrokePolygon(const DrawInfo *,const PrimitiveInfo *);
168 
169 static size_t
170  TracePath(PrimitiveInfo *,const char *);
171 
172 static void
173  TraceArc(PrimitiveInfo *,const PointInfo,const PointInfo,const PointInfo),
175  const double,const MagickBooleanType,const MagickBooleanType),
176  TraceBezier(PrimitiveInfo *,const size_t),
179  const PointInfo),
183  PointInfo),
184  TraceSquareLinecap(PrimitiveInfo *,const size_t,const double);
185 
186 /*
187 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
188 % %
189 % %
190 % %
191 % A c q u i r e D r a w I n f o %
192 % %
193 % %
194 % %
195 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
196 %
197 % AcquireDrawInfo() returns a DrawInfo structure properly initialized.
198 %
199 % The format of the AcquireDrawInfo method is:
200 %
201 % DrawInfo *AcquireDrawInfo(void)
202 %
203 */
205 {
206  DrawInfo
207  *draw_info;
208 
209  draw_info=(DrawInfo *) AcquireMagickMemory(sizeof(*draw_info));
210  if (draw_info == (DrawInfo *) NULL)
211  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
212  GetDrawInfo((ImageInfo *) NULL,draw_info);
213  return(draw_info);
214 }
215 
216 /*
217 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
218 % %
219 % %
220 % %
221 % C l o n e D r a w I n f o %
222 % %
223 % %
224 % %
225 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
226 %
227 % CloneDrawInfo() makes a copy of the given draw_info structure. If NULL
228 % is specified, a new DrawInfo structure is created initialized to default
229 % values.
230 %
231 % The format of the CloneDrawInfo method is:
232 %
233 % DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
234 % const DrawInfo *draw_info)
235 %
236 % A description of each parameter follows:
237 %
238 % o image_info: the image info.
239 %
240 % o draw_info: the draw info.
241 %
242 */
244  const DrawInfo *draw_info)
245 {
246  DrawInfo
247  *clone_info;
248 
250  *exception;
251 
252  clone_info=(DrawInfo *) AcquireMagickMemory(sizeof(*clone_info));
253  if (clone_info == (DrawInfo *) NULL)
254  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
255  GetDrawInfo(image_info,clone_info);
256  if (draw_info == (DrawInfo *) NULL)
257  return(clone_info);
258  exception=AcquireExceptionInfo();
259  if (clone_info->primitive != (char *) NULL)
260  (void) CloneString(&clone_info->primitive,draw_info->primitive);
261  if (draw_info->geometry != (char *) NULL)
262  (void) CloneString(&clone_info->geometry,draw_info->geometry);
263  clone_info->viewbox=draw_info->viewbox;
264  clone_info->affine=draw_info->affine;
265  clone_info->gravity=draw_info->gravity;
266  clone_info->fill=draw_info->fill;
267  clone_info->stroke=draw_info->stroke;
268  clone_info->stroke_width=draw_info->stroke_width;
269  if (draw_info->fill_pattern != (Image *) NULL)
270  clone_info->fill_pattern=CloneImage(draw_info->fill_pattern,0,0,MagickTrue,
271  exception);
272  if (draw_info->stroke_pattern != (Image *) NULL)
273  clone_info->stroke_pattern=CloneImage(draw_info->stroke_pattern,0,0,
274  MagickTrue,exception);
275  clone_info->stroke_antialias=draw_info->stroke_antialias;
276  clone_info->text_antialias=draw_info->text_antialias;
277  clone_info->fill_rule=draw_info->fill_rule;
278  clone_info->linecap=draw_info->linecap;
279  clone_info->linejoin=draw_info->linejoin;
280  clone_info->miterlimit=draw_info->miterlimit;
281  clone_info->dash_offset=draw_info->dash_offset;
282  clone_info->decorate=draw_info->decorate;
283  clone_info->compose=draw_info->compose;
284  if (draw_info->text != (char *) NULL)
285  (void) CloneString(&clone_info->text,draw_info->text);
286  if (draw_info->font != (char *) NULL)
287  (void) CloneString(&clone_info->font,draw_info->font);
288  if (draw_info->metrics != (char *) NULL)
289  (void) CloneString(&clone_info->metrics,draw_info->metrics);
290  if (draw_info->family != (char *) NULL)
291  (void) CloneString(&clone_info->family,draw_info->family);
292  clone_info->style=draw_info->style;
293  clone_info->stretch=draw_info->stretch;
294  clone_info->weight=draw_info->weight;
295  if (draw_info->encoding != (char *) NULL)
296  (void) CloneString(&clone_info->encoding,draw_info->encoding);
297  clone_info->pointsize=draw_info->pointsize;
298  clone_info->kerning=draw_info->kerning;
299  clone_info->interline_spacing=draw_info->interline_spacing;
300  clone_info->interword_spacing=draw_info->interword_spacing;
301  clone_info->direction=draw_info->direction;
302  if (draw_info->density != (char *) NULL)
303  (void) CloneString(&clone_info->density,draw_info->density);
304  clone_info->align=draw_info->align;
305  clone_info->undercolor=draw_info->undercolor;
306  clone_info->border_color=draw_info->border_color;
307  if (draw_info->server_name != (char *) NULL)
308  (void) CloneString(&clone_info->server_name,draw_info->server_name);
309  if (draw_info->dash_pattern != (double *) NULL)
310  {
311  register ssize_t
312  x;
313 
314  for (x=0; fabs(draw_info->dash_pattern[x]) >= DrawEpsilon; x++) ;
315  clone_info->dash_pattern=(double *) AcquireQuantumMemory((size_t) x+1UL,
316  sizeof(*clone_info->dash_pattern));
317  if (clone_info->dash_pattern == (double *) NULL)
319  "UnableToAllocateDashPattern");
320  (void) CopyMagickMemory(clone_info->dash_pattern,draw_info->dash_pattern,
321  (size_t) (x+1)*sizeof(*clone_info->dash_pattern));
322  }
323  clone_info->gradient=draw_info->gradient;
324  if (draw_info->gradient.stops != (StopInfo *) NULL)
325  {
326  size_t
327  number_stops;
328 
329  number_stops=clone_info->gradient.number_stops;
330  clone_info->gradient.stops=(StopInfo *) AcquireQuantumMemory((size_t)
331  number_stops,sizeof(*clone_info->gradient.stops));
332  if (clone_info->gradient.stops == (StopInfo *) NULL)
334  "UnableToAllocateDashPattern");
335  (void) CopyMagickMemory(clone_info->gradient.stops,
336  draw_info->gradient.stops,(size_t) number_stops*
337  sizeof(*clone_info->gradient.stops));
338  }
339  if (draw_info->clip_mask != (char *) NULL)
340  (void) CloneString(&clone_info->clip_mask,draw_info->clip_mask);
341  clone_info->bounds=draw_info->bounds;
342  clone_info->clip_units=draw_info->clip_units;
343  clone_info->render=draw_info->render;
344  clone_info->fill_alpha=draw_info->fill_alpha;
345  clone_info->stroke_alpha=draw_info->stroke_alpha;
346  clone_info->element_reference=draw_info->element_reference;
347  clone_info->debug=IsEventLogging();
348  exception=DestroyExceptionInfo(exception);
349  return(clone_info);
350 }
351 
352 /*
353 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
354 % %
355 % %
356 % %
357 + C o n v e r t P a t h T o P o l y g o n %
358 % %
359 % %
360 % %
361 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
362 %
363 % ConvertPathToPolygon() converts a path to the more efficient sorted
364 % rendering form.
365 %
366 % The format of the ConvertPathToPolygon method is:
367 %
368 % PolygonInfo *ConvertPathToPolygon(const DrawInfo *draw_info,
369 % const PathInfo *path_info)
370 %
371 % A description of each parameter follows:
372 %
373 % o Method ConvertPathToPolygon returns the path in a more efficient sorted
374 % rendering form of type PolygonInfo.
375 %
376 % o draw_info: Specifies a pointer to an DrawInfo structure.
377 %
378 % o path_info: Specifies a pointer to an PathInfo structure.
379 %
380 %
381 */
382 
383 #if defined(__cplusplus) || defined(c_plusplus)
384 extern "C" {
385 #endif
386 
387 static int CompareEdges(const void *x,const void *y)
388 {
389  register const EdgeInfo
390  *p,
391  *q;
392 
393  /*
394  Compare two edges.
395  */
396  p=(const EdgeInfo *) x;
397  q=(const EdgeInfo *) y;
398  if ((p->points[0].y-DrawEpsilon) > q->points[0].y)
399  return(1);
400  if ((p->points[0].y+DrawEpsilon) < q->points[0].y)
401  return(-1);
402  if ((p->points[0].x-DrawEpsilon) > q->points[0].x)
403  return(1);
404  if ((p->points[0].x+DrawEpsilon) < q->points[0].x)
405  return(-1);
406  if (((p->points[1].x-p->points[0].x)*(q->points[1].y-q->points[0].y)-
407  (p->points[1].y-p->points[0].y)*(q->points[1].x-q->points[0].x)) > 0.0)
408  return(1);
409  return(-1);
410 }
411 
412 #if defined(__cplusplus) || defined(c_plusplus)
413 }
414 #endif
415 
416 static void LogPolygonInfo(const PolygonInfo *polygon_info)
417 {
418  register EdgeInfo
419  *p;
420 
421  register ssize_t
422  i,
423  j;
424 
425  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin active-edge");
426  p=polygon_info->edges;
427  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
428  {
429  (void) LogMagickEvent(DrawEvent,GetMagickModule()," edge %.20g:",
430  (double) i);
431  (void) LogMagickEvent(DrawEvent,GetMagickModule()," direction: %s",
432  p->direction != MagickFalse ? "down" : "up");
433  (void) LogMagickEvent(DrawEvent,GetMagickModule()," ghostline: %s",
434  p->ghostline != MagickFalse ? "transparent" : "opaque");
436  " bounds: %g,%g - %g,%g",p->bounds.x1,p->bounds.y1,
437  p->bounds.x2,p->bounds.y2);
438  for (j=0; j < (ssize_t) p->number_points; j++)
439  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %g,%g",
440  p->points[j].x,p->points[j].y);
441  p++;
442  }
443  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end active-edge");
444 }
445 
446 static void ReversePoints(PointInfo *points,const size_t number_points)
447 {
448  PointInfo
449  point;
450 
451  register ssize_t
452  i;
453 
454  for (i=0; i < (ssize_t) (number_points >> 1); i++)
455  {
456  point=points[i];
457  points[i]=points[number_points-(i+1)];
458  points[number_points-(i+1)]=point;
459  }
460 }
461 
462 static PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info)
463 {
464  long
465  direction,
466  next_direction;
467 
468  PointInfo
469  point,
470  *points;
471 
473  *polygon_info;
474 
476  bounds;
477 
478  register ssize_t
479  i,
480  n;
481 
483  ghostline;
484 
485  size_t
486  edge,
487  number_edges,
489 
490  /*
491  Convert a path to the more efficient sorted rendering form.
492  */
493  polygon_info=(PolygonInfo *) AcquireMagickMemory(sizeof(*polygon_info));
494  if (polygon_info == (PolygonInfo *) NULL)
495  return((PolygonInfo *) NULL);
496  number_edges=16;
497  polygon_info->edges=(EdgeInfo *) AcquireQuantumMemory(number_edges,
498  sizeof(*polygon_info->edges));
499  if (polygon_info->edges == (EdgeInfo *) NULL)
500  return((PolygonInfo *) NULL);
501  (void) ResetMagickMemory(polygon_info->edges,0,number_edges*
502  sizeof(*polygon_info->edges));
503  direction=0;
504  edge=0;
505  ghostline=MagickFalse;
506  n=0;
507  number_points=0;
508  points=(PointInfo *) NULL;
509  (void) ResetMagickMemory(&point,0,sizeof(point));
510  (void) ResetMagickMemory(&bounds,0,sizeof(bounds));
511  for (i=0; path_info[i].code != EndCode; i++)
512  {
513  if ((path_info[i].code == MoveToCode) || (path_info[i].code == OpenCode) ||
514  (path_info[i].code == GhostlineCode))
515  {
516  /*
517  Move to.
518  */
519  if ((points != (PointInfo *) NULL) && (n >= 2))
520  {
521  if (edge == number_edges)
522  {
523  number_edges<<=1;
524  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
525  polygon_info->edges,(size_t) number_edges,
526  sizeof(*polygon_info->edges));
527  if (polygon_info->edges == (EdgeInfo *) NULL)
528  return((PolygonInfo *) NULL);
529  }
530  polygon_info->edges[edge].number_points=(size_t) n;
531  polygon_info->edges[edge].scanline=(-1.0);
532  polygon_info->edges[edge].highwater=0;
533  polygon_info->edges[edge].ghostline=ghostline;
534  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
535  if (direction < 0)
536  ReversePoints(points,(size_t) n);
537  polygon_info->edges[edge].points=points;
538  polygon_info->edges[edge].bounds=bounds;
539  polygon_info->edges[edge].bounds.y1=points[0].y;
540  polygon_info->edges[edge].bounds.y2=points[n-1].y;
541  points=(PointInfo *) NULL;
542  ghostline=MagickFalse;
543  edge++;
544  }
545  if (points == (PointInfo *) NULL)
546  {
547  number_points=16;
548  points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
549  sizeof(*points));
550  if (points == (PointInfo *) NULL)
551  return((PolygonInfo *) NULL);
552  }
553  ghostline=path_info[i].code == GhostlineCode ? MagickTrue : MagickFalse;
554  point=path_info[i].point;
555  points[0]=point;
556  bounds.x1=point.x;
557  bounds.x2=point.x;
558  direction=0;
559  n=1;
560  continue;
561  }
562  /*
563  Line to.
564  */
565  next_direction=((path_info[i].point.y > point.y) ||
566  ((fabs(path_info[i].point.y-point.y) < DrawEpsilon) &&
567  (path_info[i].point.x > point.x))) ? 1 : -1;
568  if ((points != (PointInfo *) NULL) && (direction != 0) &&
569  (direction != next_direction))
570  {
571  /*
572  New edge.
573  */
574  point=points[n-1];
575  if (edge == number_edges)
576  {
577  number_edges<<=1;
578  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
579  polygon_info->edges,(size_t) number_edges,
580  sizeof(*polygon_info->edges));
581  if (polygon_info->edges == (EdgeInfo *) NULL)
582  return((PolygonInfo *) NULL);
583  }
584  polygon_info->edges[edge].number_points=(size_t) n;
585  polygon_info->edges[edge].scanline=(-1.0);
586  polygon_info->edges[edge].highwater=0;
587  polygon_info->edges[edge].ghostline=ghostline;
588  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
589  if (direction < 0)
590  ReversePoints(points,(size_t) n);
591  polygon_info->edges[edge].points=points;
592  polygon_info->edges[edge].bounds=bounds;
593  polygon_info->edges[edge].bounds.y1=points[0].y;
594  polygon_info->edges[edge].bounds.y2=points[n-1].y;
595  number_points=16;
596  points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
597  sizeof(*points));
598  if (points == (PointInfo *) NULL)
599  return((PolygonInfo *) NULL);
600  n=1;
601  ghostline=MagickFalse;
602  points[0]=point;
603  bounds.x1=point.x;
604  bounds.x2=point.x;
605  edge++;
606  }
607  direction=next_direction;
608  if (points == (PointInfo *) NULL)
609  continue;
610  if (n == (ssize_t) number_points)
611  {
612  number_points<<=1;
613  points=(PointInfo *) ResizeQuantumMemory(points,(size_t) number_points,
614  sizeof(*points));
615  if (points == (PointInfo *) NULL)
616  return((PolygonInfo *) NULL);
617  }
618  point=path_info[i].point;
619  points[n]=point;
620  if (point.x < bounds.x1)
621  bounds.x1=point.x;
622  if (point.x > bounds.x2)
623  bounds.x2=point.x;
624  n++;
625  }
626  if (points != (PointInfo *) NULL)
627  {
628  if (n < 2)
629  points=(PointInfo *) RelinquishMagickMemory(points);
630  else
631  {
632  if (edge == number_edges)
633  {
634  number_edges<<=1;
635  polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
636  polygon_info->edges,(size_t) number_edges,
637  sizeof(*polygon_info->edges));
638  if (polygon_info->edges == (EdgeInfo *) NULL)
639  return((PolygonInfo *) NULL);
640  }
641  polygon_info->edges[edge].number_points=(size_t) n;
642  polygon_info->edges[edge].scanline=(-1.0);
643  polygon_info->edges[edge].highwater=0;
644  polygon_info->edges[edge].ghostline=ghostline;
645  polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
646  if (direction < 0)
647  ReversePoints(points,(size_t) n);
648  polygon_info->edges[edge].points=points;
649  polygon_info->edges[edge].bounds=bounds;
650  polygon_info->edges[edge].bounds.y1=points[0].y;
651  polygon_info->edges[edge].bounds.y2=points[n-1].y;
652  ghostline=MagickFalse;
653  edge++;
654  }
655  }
656  polygon_info->number_edges=edge;
657  qsort(polygon_info->edges,(size_t) polygon_info->number_edges,
658  sizeof(*polygon_info->edges),CompareEdges);
659  if (IsEventLogging() != MagickFalse)
660  LogPolygonInfo(polygon_info);
661  return(polygon_info);
662 }
663 
664 /*
665 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
666 % %
667 % %
668 % %
669 + C o n v e r t P r i m i t i v e T o P a t h %
670 % %
671 % %
672 % %
673 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
674 %
675 % ConvertPrimitiveToPath() converts a PrimitiveInfo structure into a vector
676 % path structure.
677 %
678 % The format of the ConvertPrimitiveToPath method is:
679 %
680 % PathInfo *ConvertPrimitiveToPath(const DrawInfo *draw_info,
681 % const PrimitiveInfo *primitive_info)
682 %
683 % A description of each parameter follows:
684 %
685 % o Method ConvertPrimitiveToPath returns a vector path structure of type
686 % PathInfo.
687 %
688 % o draw_info: a structure of type DrawInfo.
689 %
690 % o primitive_info: Specifies a pointer to an PrimitiveInfo structure.
691 %
692 %
693 */
694 
695 static void LogPathInfo(const PathInfo *path_info)
696 {
697  register const PathInfo
698  *p;
699 
700  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin vector-path");
701  for (p=path_info; p->code != EndCode; p++)
703  " %g,%g %s",p->point.x,p->point.y,p->code == GhostlineCode ?
704  "moveto ghostline" : p->code == OpenCode ? "moveto open" :
705  p->code == MoveToCode ? "moveto" : p->code == LineToCode ? "lineto" :
706  "?");
707  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end vector-path");
708 }
709 
710 static PathInfo *ConvertPrimitiveToPath(const PrimitiveInfo *primitive_info)
711 {
712  PathInfo
713  *path_info;
714 
716  code;
717 
718  PointInfo
719  p,
720  q;
721 
722  register ssize_t
723  i,
724  n;
725 
726  ssize_t
727  coordinates,
728  start;
729 
730  /*
731  Converts a PrimitiveInfo structure into a vector path structure.
732  */
733  switch (primitive_info->primitive)
734  {
735  case AlphaPrimitive:
736  case ColorPrimitive:
737  case ImagePrimitive:
738  case PointPrimitive:
739  case TextPrimitive:
740  return((PathInfo *) NULL);
741  default:
742  break;
743  }
744  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
745  path_info=(PathInfo *) AcquireQuantumMemory((size_t) (2UL*i+3UL),
746  sizeof(*path_info));
747  if (path_info == (PathInfo *) NULL)
748  return((PathInfo *) NULL);
749  coordinates=0;
750  n=0;
751  p.x=(-1.0);
752  p.y=(-1.0);
753  q.x=(-1.0);
754  q.y=(-1.0);
755  start=0;
756  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
757  {
758  code=LineToCode;
759  if (coordinates <= 0)
760  {
761  coordinates=(ssize_t) primitive_info[i].coordinates;
762  p=primitive_info[i].point;
763  start=n;
764  code=MoveToCode;
765  }
766  coordinates--;
767  /*
768  Eliminate duplicate points.
769  */
770  if ((i == 0) || (fabs(q.x-primitive_info[i].point.x) >= DrawEpsilon) ||
771  (fabs(q.y-primitive_info[i].point.y) >= DrawEpsilon))
772  {
773  path_info[n].code=code;
774  path_info[n].point=primitive_info[i].point;
775  q=primitive_info[i].point;
776  n++;
777  }
778  if (coordinates > 0)
779  continue;
780  if ((fabs(p.x-primitive_info[i].point.x) < DrawEpsilon) &&
781  (fabs(p.y-primitive_info[i].point.y) < DrawEpsilon))
782  continue;
783  /*
784  Mark the p point as open if it does not match the q.
785  */
786  path_info[start].code=OpenCode;
787  path_info[n].code=GhostlineCode;
788  path_info[n].point=primitive_info[i].point;
789  n++;
790  path_info[n].code=LineToCode;
791  path_info[n].point=p;
792  n++;
793  }
794  path_info[n].code=EndCode;
795  path_info[n].point.x=0.0;
796  path_info[n].point.y=0.0;
797  if (IsEventLogging() != MagickFalse)
798  LogPathInfo(path_info);
799  return(path_info);
800 }
801 
802 /*
803 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
804 % %
805 % %
806 % %
807 % D e s t r o y D r a w I n f o %
808 % %
809 % %
810 % %
811 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
812 %
813 % DestroyDrawInfo() deallocates memory associated with an DrawInfo
814 % structure.
815 %
816 % The format of the DestroyDrawInfo method is:
817 %
818 % DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
819 %
820 % A description of each parameter follows:
821 %
822 % o draw_info: the draw info.
823 %
824 */
826 {
827  if (draw_info->debug != MagickFalse)
828  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
829  assert(draw_info != (DrawInfo *) NULL);
830  assert(draw_info->signature == MagickCoreSignature);
831  if (draw_info->primitive != (char *) NULL)
832  draw_info->primitive=DestroyString(draw_info->primitive);
833  if (draw_info->text != (char *) NULL)
834  draw_info->text=DestroyString(draw_info->text);
835  if (draw_info->geometry != (char *) NULL)
836  draw_info->geometry=DestroyString(draw_info->geometry);
837  if (draw_info->fill_pattern != (Image *) NULL)
838  draw_info->fill_pattern=DestroyImage(draw_info->fill_pattern);
839  if (draw_info->stroke_pattern != (Image *) NULL)
840  draw_info->stroke_pattern=DestroyImage(draw_info->stroke_pattern);
841  if (draw_info->font != (char *) NULL)
842  draw_info->font=DestroyString(draw_info->font);
843  if (draw_info->metrics != (char *) NULL)
844  draw_info->metrics=DestroyString(draw_info->metrics);
845  if (draw_info->family != (char *) NULL)
846  draw_info->family=DestroyString(draw_info->family);
847  if (draw_info->encoding != (char *) NULL)
848  draw_info->encoding=DestroyString(draw_info->encoding);
849  if (draw_info->density != (char *) NULL)
850  draw_info->density=DestroyString(draw_info->density);
851  if (draw_info->server_name != (char *) NULL)
852  draw_info->server_name=(char *)
854  if (draw_info->dash_pattern != (double *) NULL)
855  draw_info->dash_pattern=(double *) RelinquishMagickMemory(
856  draw_info->dash_pattern);
857  if (draw_info->gradient.stops != (StopInfo *) NULL)
859  draw_info->gradient.stops);
860  if (draw_info->clip_mask != (char *) NULL)
861  draw_info->clip_mask=DestroyString(draw_info->clip_mask);
862  draw_info->signature=(~MagickCoreSignature);
863  draw_info=(DrawInfo *) RelinquishMagickMemory(draw_info);
864  return(draw_info);
865 }
866 
867 /*
868 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
869 % %
870 % %
871 % %
872 + D e s t r o y E d g e %
873 % %
874 % %
875 % %
876 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
877 %
878 % DestroyEdge() destroys the specified polygon edge.
879 %
880 % The format of the DestroyEdge method is:
881 %
882 % ssize_t DestroyEdge(PolygonInfo *polygon_info,const int edge)
883 %
884 % A description of each parameter follows:
885 %
886 % o polygon_info: Specifies a pointer to an PolygonInfo structure.
887 %
888 % o edge: the polygon edge number to destroy.
889 %
890 */
891 static size_t DestroyEdge(PolygonInfo *polygon_info,
892  const size_t edge)
893 {
894  assert(edge < polygon_info->number_edges);
895  polygon_info->edges[edge].points=(PointInfo *) RelinquishMagickMemory(
896  polygon_info->edges[edge].points);
897  polygon_info->number_edges--;
898  if (edge < polygon_info->number_edges)
899  (void) CopyMagickMemory(polygon_info->edges+edge,polygon_info->edges+edge+1,
900  (size_t) (polygon_info->number_edges-edge)*sizeof(*polygon_info->edges));
901  return(polygon_info->number_edges);
902 }
903 
904 /*
905 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
906 % %
907 % %
908 % %
909 + D e s t r o y P o l y g o n I n f o %
910 % %
911 % %
912 % %
913 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
914 %
915 % DestroyPolygonInfo() destroys the PolygonInfo data structure.
916 %
917 % The format of the DestroyPolygonInfo method is:
918 %
919 % PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
920 %
921 % A description of each parameter follows:
922 %
923 % o polygon_info: Specifies a pointer to an PolygonInfo structure.
924 %
925 */
927 {
928  register ssize_t
929  i;
930 
931  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
932  polygon_info->edges[i].points=(PointInfo *)
933  RelinquishMagickMemory(polygon_info->edges[i].points);
934  polygon_info->edges=(EdgeInfo *) RelinquishMagickMemory(polygon_info->edges);
935  return((PolygonInfo *) RelinquishMagickMemory(polygon_info));
936 }
937 
938 /*
939 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
940 % %
941 % %
942 % %
943 % D r a w A f f i n e I m a g e %
944 % %
945 % %
946 % %
947 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
948 %
949 % DrawAffineImage() composites the source over the destination image as
950 % dictated by the affine transform.
951 %
952 % The format of the DrawAffineImage method is:
953 %
954 % MagickBooleanType DrawAffineImage(Image *image,const Image *source,
955 % const AffineMatrix *affine,ExceptionInfo *exception)
956 %
957 % A description of each parameter follows:
958 %
959 % o image: the image.
960 %
961 % o source: the source image.
962 %
963 % o affine: the affine transform.
964 %
965 % o exception: return any errors or warnings in this structure.
966 %
967 */
968 
969 static SegmentInfo AffineEdge(const Image *image,const AffineMatrix *affine,
970  const double y,const SegmentInfo *edge)
971 {
972  double
973  intercept,
974  z;
975 
976  register double
977  x;
978 
980  inverse_edge;
981 
982  /*
983  Determine left and right edges.
984  */
985  inverse_edge.x1=edge->x1;
986  inverse_edge.y1=edge->y1;
987  inverse_edge.x2=edge->x2;
988  inverse_edge.y2=edge->y2;
989  z=affine->ry*y+affine->tx;
990  if (affine->sx >= DrawEpsilon)
991  {
992  intercept=(-z/affine->sx);
993  x=intercept;
994  if (x > inverse_edge.x1)
995  inverse_edge.x1=x;
996  intercept=(-z+(double) image->columns)/affine->sx;
997  x=intercept;
998  if (x < inverse_edge.x2)
999  inverse_edge.x2=x;
1000  }
1001  else
1002  if (affine->sx < -DrawEpsilon)
1003  {
1004  intercept=(-z+(double) image->columns)/affine->sx;
1005  x=intercept;
1006  if (x > inverse_edge.x1)
1007  inverse_edge.x1=x;
1008  intercept=(-z/affine->sx);
1009  x=intercept;
1010  if (x < inverse_edge.x2)
1011  inverse_edge.x2=x;
1012  }
1013  else
1014  if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->columns))
1015  {
1016  inverse_edge.x2=edge->x1;
1017  return(inverse_edge);
1018  }
1019  /*
1020  Determine top and bottom edges.
1021  */
1022  z=affine->sy*y+affine->ty;
1023  if (affine->rx >= DrawEpsilon)
1024  {
1025  intercept=(-z/affine->rx);
1026  x=intercept;
1027  if (x > inverse_edge.x1)
1028  inverse_edge.x1=x;
1029  intercept=(-z+(double) image->rows)/affine->rx;
1030  x=intercept;
1031  if (x < inverse_edge.x2)
1032  inverse_edge.x2=x;
1033  }
1034  else
1035  if (affine->rx < -DrawEpsilon)
1036  {
1037  intercept=(-z+(double) image->rows)/affine->rx;
1038  x=intercept;
1039  if (x > inverse_edge.x1)
1040  inverse_edge.x1=x;
1041  intercept=(-z/affine->rx);
1042  x=intercept;
1043  if (x < inverse_edge.x2)
1044  inverse_edge.x2=x;
1045  }
1046  else
1047  if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->rows))
1048  {
1049  inverse_edge.x2=edge->x2;
1050  return(inverse_edge);
1051  }
1052  return(inverse_edge);
1053 }
1054 
1056 {
1057  AffineMatrix
1058  inverse_affine;
1059 
1060  double
1061  determinant;
1062 
1063  determinant=PerceptibleReciprocal(affine->sx*affine->sy-affine->rx*
1064  affine->ry);
1065  inverse_affine.sx=determinant*affine->sy;
1066  inverse_affine.rx=determinant*(-affine->rx);
1067  inverse_affine.ry=determinant*(-affine->ry);
1068  inverse_affine.sy=determinant*affine->sx;
1069  inverse_affine.tx=(-affine->tx)*inverse_affine.sx-affine->ty*
1070  inverse_affine.ry;
1071  inverse_affine.ty=(-affine->tx)*inverse_affine.rx-affine->ty*
1072  inverse_affine.sy;
1073  return(inverse_affine);
1074 }
1075 
1077  const Image *source,const AffineMatrix *affine,ExceptionInfo *exception)
1078 {
1079  AffineMatrix
1080  inverse_affine;
1081 
1082  CacheView
1083  *image_view,
1084  *source_view;
1085 
1087  status;
1088 
1089  PixelInfo
1090  zero;
1091 
1092  PointInfo
1093  extent[4],
1094  min,
1095  max;
1096 
1097  register ssize_t
1098  i;
1099 
1100  SegmentInfo
1101  edge;
1102 
1103  ssize_t
1104  start,
1105  stop,
1106  y;
1107 
1108  /*
1109  Determine bounding box.
1110  */
1111  assert(image != (Image *) NULL);
1112  assert(image->signature == MagickCoreSignature);
1113  if (image->debug != MagickFalse)
1114  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1115  assert(source != (const Image *) NULL);
1116  assert(source->signature == MagickCoreSignature);
1117  assert(affine != (AffineMatrix *) NULL);
1118  extent[0].x=0.0;
1119  extent[0].y=0.0;
1120  extent[1].x=(double) source->columns-1.0;
1121  extent[1].y=0.0;
1122  extent[2].x=(double) source->columns-1.0;
1123  extent[2].y=(double) source->rows-1.0;
1124  extent[3].x=0.0;
1125  extent[3].y=(double) source->rows-1.0;
1126  for (i=0; i < 4; i++)
1127  {
1128  PointInfo
1129  point;
1130 
1131  point=extent[i];
1132  extent[i].x=point.x*affine->sx+point.y*affine->ry+affine->tx;
1133  extent[i].y=point.x*affine->rx+point.y*affine->sy+affine->ty;
1134  }
1135  min=extent[0];
1136  max=extent[0];
1137  for (i=1; i < 4; i++)
1138  {
1139  if (min.x > extent[i].x)
1140  min.x=extent[i].x;
1141  if (min.y > extent[i].y)
1142  min.y=extent[i].y;
1143  if (max.x < extent[i].x)
1144  max.x=extent[i].x;
1145  if (max.y < extent[i].y)
1146  max.y=extent[i].y;
1147  }
1148  /*
1149  Affine transform image.
1150  */
1151  if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
1152  return(MagickFalse);
1153  status=MagickTrue;
1154  edge.x1=MagickMax(min.x,0.0);
1155  edge.y1=MagickMax(min.y,0.0);
1156  edge.x2=MagickMin(max.x,(double) image->columns-1.0);
1157  edge.y2=MagickMin(max.y,(double) image->rows-1.0);
1158  inverse_affine=InverseAffineMatrix(affine);
1159  GetPixelInfo(image,&zero);
1160  start=(ssize_t) ceil(edge.y1-0.5);
1161  stop=(ssize_t) floor(edge.y2+0.5);
1162  source_view=AcquireVirtualCacheView(source,exception);
1163  image_view=AcquireAuthenticCacheView(image,exception);
1164 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1165  #pragma omp parallel for schedule(static,4) shared(status) \
1166  magick_threads(source,image,1,1)
1167 #endif
1168  for (y=start; y <= stop; y++)
1169  {
1170  PixelInfo
1171  composite,
1172  pixel;
1173 
1174  PointInfo
1175  point;
1176 
1177  register ssize_t
1178  x;
1179 
1180  register Quantum
1181  *magick_restrict q;
1182 
1183  SegmentInfo
1184  inverse_edge;
1185 
1186  ssize_t
1187  x_offset;
1188 
1189  inverse_edge=AffineEdge(source,&inverse_affine,(double) y,&edge);
1190  if (inverse_edge.x2 < inverse_edge.x1)
1191  continue;
1192  q=GetCacheViewAuthenticPixels(image_view,(ssize_t) ceil(inverse_edge.x1-
1193  0.5),y,(size_t) (floor(inverse_edge.x2+0.5)-ceil(inverse_edge.x1-0.5)+1),
1194  1,exception);
1195  if (q == (Quantum *) NULL)
1196  continue;
1197  pixel=zero;
1198  composite=zero;
1199  x_offset=0;
1200  for (x=(ssize_t) ceil(inverse_edge.x1-0.5); x <= (ssize_t) floor(inverse_edge.x2+0.5); x++)
1201  {
1202  point.x=(double) x*inverse_affine.sx+y*inverse_affine.ry+
1203  inverse_affine.tx;
1204  point.y=(double) x*inverse_affine.rx+y*inverse_affine.sy+
1205  inverse_affine.ty;
1206  (void) InterpolatePixelInfo(source,source_view,UndefinedInterpolatePixel,
1207  point.x,point.y,&pixel,exception);
1208  GetPixelInfoPixel(image,q,&composite);
1209  CompositePixelInfoOver(&pixel,pixel.alpha,&composite,composite.alpha,
1210  &composite);
1211  SetPixelViaPixelInfo(image,&composite,q);
1212  x_offset++;
1213  q+=GetPixelChannels(image);
1214  }
1215  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1216  status=MagickFalse;
1217  }
1218  source_view=DestroyCacheView(source_view);
1219  image_view=DestroyCacheView(image_view);
1220  return(status);
1221 }
1222 
1223 /*
1224 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1225 % %
1226 % %
1227 % %
1228 + D r a w B o u n d i n g R e c t a n g l e s %
1229 % %
1230 % %
1231 % %
1232 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1233 %
1234 % DrawBoundingRectangles() draws the bounding rectangles on the image. This
1235 % is only useful for developers debugging the rendering algorithm.
1236 %
1237 % The format of the DrawBoundingRectangles method is:
1238 %
1239 % void DrawBoundingRectangles(Image *image,const DrawInfo *draw_info,
1240 % PolygonInfo *polygon_info,ExceptionInfo *exception)
1241 %
1242 % A description of each parameter follows:
1243 %
1244 % o image: the image.
1245 %
1246 % o draw_info: the draw info.
1247 %
1248 % o polygon_info: Specifies a pointer to a PolygonInfo structure.
1249 %
1250 % o exception: return any errors or warnings in this structure.
1251 %
1252 */
1253 static void DrawBoundingRectangles(Image *image,const DrawInfo *draw_info,
1254  const PolygonInfo *polygon_info,ExceptionInfo *exception)
1255 {
1256  DrawInfo
1257  *clone_info;
1258 
1259  double
1260  mid;
1261 
1262  PointInfo
1263  end,
1264  resolution,
1265  start;
1266 
1268  primitive_info[6];
1269 
1270  register ssize_t
1271  i;
1272 
1273  SegmentInfo
1274  bounds;
1275 
1276  ssize_t
1277  coordinates;
1278 
1279  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1280  (void) QueryColorCompliance("#000F",AllCompliance,&clone_info->fill,
1281  exception);
1282  resolution.x=DefaultResolution;
1283  resolution.y=DefaultResolution;
1284  if (clone_info->density != (char *) NULL)
1285  {
1286  GeometryInfo
1287  geometry_info;
1288 
1290  flags;
1291 
1292  flags=ParseGeometry(clone_info->density,&geometry_info);
1293  resolution.x=geometry_info.rho;
1294  resolution.y=geometry_info.sigma;
1295  if ((flags & SigmaValue) == MagickFalse)
1296  resolution.y=resolution.x;
1297  }
1298  mid=(resolution.x/72.0)*ExpandAffine(&clone_info->affine)*
1299  clone_info->stroke_width/2.0;
1300  bounds.x1=0.0;
1301  bounds.y1=0.0;
1302  bounds.x2=0.0;
1303  bounds.y2=0.0;
1304  if (polygon_info != (PolygonInfo *) NULL)
1305  {
1306  bounds=polygon_info->edges[0].bounds;
1307  for (i=1; i < (ssize_t) polygon_info->number_edges; i++)
1308  {
1309  if (polygon_info->edges[i].bounds.x1 < (double) bounds.x1)
1310  bounds.x1=polygon_info->edges[i].bounds.x1;
1311  if (polygon_info->edges[i].bounds.y1 < (double) bounds.y1)
1312  bounds.y1=polygon_info->edges[i].bounds.y1;
1313  if (polygon_info->edges[i].bounds.x2 > (double) bounds.x2)
1314  bounds.x2=polygon_info->edges[i].bounds.x2;
1315  if (polygon_info->edges[i].bounds.y2 > (double) bounds.y2)
1316  bounds.y2=polygon_info->edges[i].bounds.y2;
1317  }
1318  bounds.x1-=mid;
1319  bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double)
1320  image->columns ? (double) image->columns-1 : bounds.x1;
1321  bounds.y1-=mid;
1322  bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double)
1323  image->rows ? (double) image->rows-1 : bounds.y1;
1324  bounds.x2+=mid;
1325  bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double)
1326  image->columns ? (double) image->columns-1 : bounds.x2;
1327  bounds.y2+=mid;
1328  bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double)
1329  image->rows ? (double) image->rows-1 : bounds.y2;
1330  for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
1331  {
1332  if (polygon_info->edges[i].direction != 0)
1333  (void) QueryColorCompliance("red",AllCompliance,&clone_info->stroke,
1334  exception);
1335  else
1336  (void) QueryColorCompliance("green",AllCompliance,&clone_info->stroke,
1337  exception);
1338  start.x=(double) (polygon_info->edges[i].bounds.x1-mid);
1339  start.y=(double) (polygon_info->edges[i].bounds.y1-mid);
1340  end.x=(double) (polygon_info->edges[i].bounds.x2+mid);
1341  end.y=(double) (polygon_info->edges[i].bounds.y2+mid);
1342  primitive_info[0].primitive=RectanglePrimitive;
1343  TraceRectangle(primitive_info,start,end);
1344  primitive_info[0].method=ReplaceMethod;
1345  coordinates=(ssize_t) primitive_info[0].coordinates;
1346  primitive_info[coordinates].primitive=UndefinedPrimitive;
1347  (void) DrawPrimitive(image,clone_info,primitive_info,exception);
1348  }
1349  }
1350  (void) QueryColorCompliance("blue",AllCompliance,&clone_info->stroke,
1351  exception);
1352  start.x=(double) (bounds.x1-mid);
1353  start.y=(double) (bounds.y1-mid);
1354  end.x=(double) (bounds.x2+mid);
1355  end.y=(double) (bounds.y2+mid);
1356  primitive_info[0].primitive=RectanglePrimitive;
1357  TraceRectangle(primitive_info,start,end);
1358  primitive_info[0].method=ReplaceMethod;
1359  coordinates=(ssize_t) primitive_info[0].coordinates;
1360  primitive_info[coordinates].primitive=UndefinedPrimitive;
1361  (void) DrawPrimitive(image,clone_info,primitive_info,exception);
1362  clone_info=DestroyDrawInfo(clone_info);
1363 }
1364 
1365 /*
1366 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1367 % %
1368 % %
1369 % %
1370 % D r a w C l i p P a t h %
1371 % %
1372 % %
1373 % %
1374 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1375 %
1376 % DrawClipPath() draws the clip path on the image mask.
1377 %
1378 % The format of the DrawClipPath method is:
1379 %
1380 % MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info,
1381 % const char *name,ExceptionInfo *exception)
1382 %
1383 % A description of each parameter follows:
1384 %
1385 % o image: the image.
1386 %
1387 % o draw_info: the draw info.
1388 %
1389 % o name: the name of the clip path.
1390 %
1391 % o exception: return any errors or warnings in this structure.
1392 %
1393 */
1395  const DrawInfo *draw_info,const char *name,ExceptionInfo *exception)
1396 {
1397  char
1398  filename[MagickPathExtent];
1399 
1400  Image
1401  *clip_mask;
1402 
1403  const char
1404  *value;
1405 
1406  DrawInfo
1407  *clone_info;
1408 
1410  status;
1411 
1412  assert(image != (Image *) NULL);
1413  assert(image->signature == MagickCoreSignature);
1414  if (image->debug != MagickFalse)
1415  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1416  assert(draw_info != (const DrawInfo *) NULL);
1417  (void) FormatLocaleString(filename,MagickPathExtent,"%s",name);
1418  value=GetImageArtifact(image,filename);
1419  if (value == (const char *) NULL)
1420  return(MagickFalse);
1421  clip_mask=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
1422  if (clip_mask == (Image *) NULL)
1423  return(MagickFalse);
1424  (void) QueryColorCompliance("#0000",AllCompliance,
1425  &clip_mask->background_color,exception);
1427  (void) SetImageBackgroundColor(clip_mask,exception);
1428  if (image->debug != MagickFalse)
1429  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin clip-path %s",
1430  draw_info->clip_mask);
1431  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1432  (void) CloneString(&clone_info->primitive,value);
1433  (void) QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
1434  exception);
1435  clone_info->clip_mask=(char *) NULL;
1436  status=NegateImage(clip_mask,MagickFalse,exception);
1437  (void) SetImageMask(image,ReadPixelMask,clip_mask,exception);
1438  clip_mask=DestroyImage(clip_mask);
1439  status&=DrawImage(image,clone_info,exception);
1440  clone_info=DestroyDrawInfo(clone_info);
1441  if (image->debug != MagickFalse)
1442  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end clip-path");
1443  return(status != 0 ? MagickTrue : MagickFalse);
1444 }
1445 
1446 /*
1447 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1448 % %
1449 % %
1450 % %
1451 + D r a w D a s h P o l y g o n %
1452 % %
1453 % %
1454 % %
1455 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1456 %
1457 % DrawDashPolygon() draws a dashed polygon (line, rectangle, ellipse) on the
1458 % image while respecting the dash offset and dash pattern attributes.
1459 %
1460 % The format of the DrawDashPolygon method is:
1461 %
1462 % MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1463 % const PrimitiveInfo *primitive_info,Image *image,
1464 % ExceptionInfo *exception)
1465 %
1466 % A description of each parameter follows:
1467 %
1468 % o draw_info: the draw info.
1469 %
1470 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
1471 %
1472 % o image: the image.
1473 %
1474 % o exception: return any errors or warnings in this structure.
1475 %
1476 */
1478  const PrimitiveInfo *primitive_info,Image *image,ExceptionInfo *exception)
1479 {
1480  DrawInfo
1481  *clone_info;
1482 
1483  double
1484  length,
1485  maximum_length,
1486  offset,
1487  scale,
1488  total_length;
1489 
1491  status;
1492 
1494  *dash_polygon;
1495 
1496  register ssize_t
1497  i;
1498 
1499  register double
1500  dx,
1501  dy;
1502 
1503  size_t
1504  number_vertices;
1505 
1506  ssize_t
1507  j,
1508  n;
1509 
1510  assert(draw_info != (const DrawInfo *) NULL);
1511  if (image->debug != MagickFalse)
1512  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-dash");
1513  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
1514  number_vertices=(size_t) i;
1515  dash_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
1516  (2UL*number_vertices+1UL),sizeof(*dash_polygon));
1517  if (dash_polygon == (PrimitiveInfo *) NULL)
1518  return(MagickFalse);
1519  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1520  clone_info->miterlimit=0;
1521  dash_polygon[0]=primitive_info[0];
1522  scale=ExpandAffine(&draw_info->affine);
1523  length=scale*(draw_info->dash_pattern[0]-0.5);
1524  offset=fabs(draw_info->dash_offset) >= DrawEpsilon ?
1525  scale*draw_info->dash_offset : 0.0;
1526  j=1;
1527  for (n=0; offset > 0.0; j=0)
1528  {
1529  if (draw_info->dash_pattern[n] <= 0.0)
1530  break;
1531  length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1532  if (offset > length)
1533  {
1534  offset-=length;
1535  n++;
1536  length=scale*(draw_info->dash_pattern[n]+0.5);
1537  continue;
1538  }
1539  if (offset < length)
1540  {
1541  length-=offset;
1542  offset=0.0;
1543  break;
1544  }
1545  offset=0.0;
1546  n++;
1547  }
1548  status=MagickTrue;
1549  maximum_length=0.0;
1550  total_length=0.0;
1551  for (i=1; (i < (ssize_t) number_vertices) && (length >= 0.0); i++)
1552  {
1553  dx=primitive_info[i].point.x-primitive_info[i-1].point.x;
1554  dy=primitive_info[i].point.y-primitive_info[i-1].point.y;
1555  maximum_length=hypot((double) dx,dy);
1556  if (fabs(length) < DrawEpsilon)
1557  {
1558  n++;
1559  if (fabs(draw_info->dash_pattern[n]) < DrawEpsilon)
1560  n=0;
1561  length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1562  }
1563  for (total_length=0.0; (length >= 0.0) && (maximum_length >= (total_length+length)); )
1564  {
1565  total_length+=length;
1566  if ((n & 0x01) != 0)
1567  {
1568  dash_polygon[0]=primitive_info[0];
1569  dash_polygon[0].point.x=(double) (primitive_info[i-1].point.x+dx*
1570  total_length/maximum_length);
1571  dash_polygon[0].point.y=(double) (primitive_info[i-1].point.y+dy*
1572  total_length/maximum_length);
1573  j=1;
1574  }
1575  else
1576  {
1577  if ((j+1) > (ssize_t) (2*number_vertices))
1578  break;
1579  dash_polygon[j]=primitive_info[i-1];
1580  dash_polygon[j].point.x=(double) (primitive_info[i-1].point.x+dx*
1581  total_length/maximum_length);
1582  dash_polygon[j].point.y=(double) (primitive_info[i-1].point.y+dy*
1583  total_length/maximum_length);
1584  dash_polygon[j].coordinates=1;
1585  j++;
1586  dash_polygon[0].coordinates=(size_t) j;
1587  dash_polygon[j].primitive=UndefinedPrimitive;
1588  status&=DrawStrokePolygon(image,clone_info,dash_polygon,exception);
1589  }
1590  n++;
1591  if (fabs(draw_info->dash_pattern[n]) < DrawEpsilon)
1592  n=0;
1593  length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1594  }
1595  length-=(maximum_length-total_length);
1596  if ((n & 0x01) != 0)
1597  continue;
1598  dash_polygon[j]=primitive_info[i];
1599  dash_polygon[j].coordinates=1;
1600  j++;
1601  }
1602  if ((total_length <= maximum_length) && ((n & 0x01) == 0) && (j > 1))
1603  {
1604  dash_polygon[j]=primitive_info[i-1];
1605  dash_polygon[j].point.x+=DrawEpsilon;
1606  dash_polygon[j].point.y+=DrawEpsilon;
1607  dash_polygon[j].coordinates=1;
1608  j++;
1609  dash_polygon[0].coordinates=(size_t) j;
1610  dash_polygon[j].primitive=UndefinedPrimitive;
1611  status&=DrawStrokePolygon(image,clone_info,dash_polygon,exception);
1612  }
1613  dash_polygon=(PrimitiveInfo *) RelinquishMagickMemory(dash_polygon);
1614  clone_info=DestroyDrawInfo(clone_info);
1615  if (image->debug != MagickFalse)
1616  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-dash");
1617  return(status != 0 ? MagickTrue : MagickFalse);
1618 }
1619 
1620 /*
1621 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1622 % %
1623 % %
1624 % %
1625 % D r a w I m a g e %
1626 % %
1627 % %
1628 % %
1629 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1630 %
1631 % DrawImage() draws a graphic primitive on your image. The primitive
1632 % may be represented as a string or filename. Precede the filename with an
1633 % "at" sign (@) and the contents of the file are drawn on the image. You
1634 % can affect how text is drawn by setting one or more members of the draw
1635 % info structure.
1636 %
1637 % The format of the DrawImage method is:
1638 %
1639 % MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info,
1640 % ExceptionInfo *exception)
1641 %
1642 % A description of each parameter follows:
1643 %
1644 % o image: the image.
1645 %
1646 % o draw_info: the draw info.
1647 %
1648 % o exception: return any errors or warnings in this structure.
1649 %
1650 */
1651 
1652 static inline MagickBooleanType IsPoint(const char *point)
1653 {
1654  char
1655  *p;
1656 
1657  double
1658  value;
1659 
1660  value=StringToDouble(point,&p);
1661  return((fabs(value) < DrawEpsilon) && (p == point) ? MagickFalse : MagickTrue);
1662 }
1663 
1664 static inline void TracePoint(PrimitiveInfo *primitive_info,
1665  const PointInfo point)
1666 {
1667  primitive_info->coordinates=1;
1668  primitive_info->point=point;
1669 }
1670 
1672  ExceptionInfo *exception)
1673 {
1674 #define RenderImageTag "Render/Image"
1675 
1676  AffineMatrix
1677  affine,
1678  current;
1679 
1680  char
1681  keyword[MagickPathExtent],
1682  geometry[MagickPathExtent],
1683  *next_token,
1684  pattern[MagickPathExtent],
1685  *primitive,
1686  *token;
1687 
1688  const char
1689  *q;
1690 
1691  double
1692  angle,
1693  factor,
1694  primitive_extent;
1695 
1696  DrawInfo
1697  **graphic_context;
1698 
1700  proceed;
1701 
1703  length,
1704  number_points;
1705 
1707  status;
1708 
1709  PointInfo
1710  point;
1711 
1713  *primitive_info;
1714 
1716  primitive_type;
1717 
1718  register const char
1719  *p;
1720 
1721  register ssize_t
1722  i,
1723  x;
1724 
1725  SegmentInfo
1726  bounds;
1727 
1728  size_t
1729  extent,
1730  number_stops;
1731 
1732  ssize_t
1733  j,
1734  k,
1735  n;
1736 
1737  StopInfo
1738  *stops;
1739 
1740  assert(image != (Image *) NULL);
1741  assert(image->signature == MagickCoreSignature);
1742  if (image->debug != MagickFalse)
1743  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1744  assert(draw_info != (DrawInfo *) NULL);
1745  assert(draw_info->signature == MagickCoreSignature);
1746  if (image->debug != MagickFalse)
1747  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
1748  if ((draw_info->primitive == (char *) NULL) ||
1749  (*draw_info->primitive == '\0'))
1750  return(MagickFalse);
1751  if (image->debug != MagickFalse)
1752  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"begin draw-image");
1753  if (*draw_info->primitive != '@')
1754  primitive=AcquireString(draw_info->primitive);
1755  else
1756  primitive=FileToString(draw_info->primitive+1,~0UL,exception);
1757  if (primitive == (char *) NULL)
1758  return(MagickFalse);
1759  primitive_extent=(double) strlen(primitive);
1760  (void) SetImageArtifact(image,"MVG",primitive);
1761  n=0;
1762  number_stops=0;
1763  stops=(StopInfo *) NULL;
1764  /*
1765  Allocate primitive info memory.
1766  */
1767  graphic_context=(DrawInfo **) AcquireMagickMemory(sizeof(*graphic_context));
1768  if (graphic_context == (DrawInfo **) NULL)
1769  {
1770  primitive=DestroyString(primitive);
1771  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
1772  image->filename);
1773  }
1774  number_points=6553;
1775  primitive_info=(PrimitiveInfo *) AcquireQuantumMemory((size_t) number_points,
1776  sizeof(*primitive_info));
1777  if (primitive_info == (PrimitiveInfo *) NULL)
1778  {
1779  primitive=DestroyString(primitive);
1780  for ( ; n >= 0; n--)
1781  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
1782  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
1783  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
1784  image->filename);
1785  }
1786  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1787  graphic_context[n]->viewbox=image->page;
1788  if ((image->page.width == 0) || (image->page.height == 0))
1789  {
1790  graphic_context[n]->viewbox.width=image->columns;
1791  graphic_context[n]->viewbox.height=image->rows;
1792  }
1793  token=AcquireString(primitive);
1794  extent=strlen(token)+MagickPathExtent;
1795  if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
1796  return(MagickFalse);
1797  status=MagickTrue;
1798  for (q=primitive; *q != '\0'; )
1799  {
1800  /*
1801  Interpret graphic primitive.
1802  */
1803  GetNextToken(q,&q,MagickPathExtent,keyword);
1804  if (*keyword == '\0')
1805  break;
1806  if (*keyword == '#')
1807  {
1808  /*
1809  Comment.
1810  */
1811  while ((*q != '\n') && (*q != '\0'))
1812  q++;
1813  continue;
1814  }
1815  p=q-strlen(keyword)-1;
1816  primitive_type=UndefinedPrimitive;
1817  current=graphic_context[n]->affine;
1818  GetAffineMatrix(&affine);
1819  switch (*keyword)
1820  {
1821  case ';':
1822  break;
1823  case 'a':
1824  case 'A':
1825  {
1826  if (LocaleCompare("affine",keyword) == 0)
1827  {
1828  GetNextToken(q,&q,extent,token);
1829  affine.sx=StringToDouble(token,&next_token);
1830  if (token == next_token)
1831  status=MagickFalse;
1832  GetNextToken(q,&q,extent,token);
1833  if (*token == ',')
1834  GetNextToken(q,&q,extent,token);
1835  affine.rx=StringToDouble(token,&next_token);
1836  if (token == next_token)
1837  status=MagickFalse;
1838  GetNextToken(q,&q,extent,token);
1839  if (*token == ',')
1840  GetNextToken(q,&q,extent,token);
1841  affine.ry=StringToDouble(token,&next_token);
1842  if (token == next_token)
1843  status=MagickFalse;
1844  GetNextToken(q,&q,extent,token);
1845  if (*token == ',')
1846  GetNextToken(q,&q,extent,token);
1847  affine.sy=StringToDouble(token,&next_token);
1848  if (token == next_token)
1849  status=MagickFalse;
1850  GetNextToken(q,&q,extent,token);
1851  if (*token == ',')
1852  GetNextToken(q,&q,extent,token);
1853  affine.tx=StringToDouble(token,&next_token);
1854  if (token == next_token)
1855  status=MagickFalse;
1856  GetNextToken(q,&q,extent,token);
1857  if (*token == ',')
1858  GetNextToken(q,&q,extent,token);
1859  affine.ty=StringToDouble(token,&next_token);
1860  if (token == next_token)
1861  status=MagickFalse;
1862  break;
1863  }
1864  if (LocaleCompare("alpha",keyword) == 0)
1865  {
1866  primitive_type=AlphaPrimitive;
1867  break;
1868  }
1869  if (LocaleCompare("arc",keyword) == 0)
1870  {
1871  primitive_type=ArcPrimitive;
1872  break;
1873  }
1874  status=MagickFalse;
1875  break;
1876  }
1877  case 'b':
1878  case 'B':
1879  {
1880  if (LocaleCompare("bezier",keyword) == 0)
1881  {
1882  primitive_type=BezierPrimitive;
1883  break;
1884  }
1885  if (LocaleCompare("border-color",keyword) == 0)
1886  {
1887  GetNextToken(q,&q,extent,token);
1888  (void) QueryColorCompliance(token,AllCompliance,
1889  &graphic_context[n]->border_color,exception);
1890  break;
1891  }
1892  status=MagickFalse;
1893  break;
1894  }
1895  case 'c':
1896  case 'C':
1897  {
1898  if (LocaleCompare("clip-path",keyword) == 0)
1899  {
1900  /*
1901  Create clip mask.
1902  */
1903  GetNextToken(q,&q,extent,token);
1904  (void) CloneString(&graphic_context[n]->clip_mask,token);
1905  (void) DrawClipPath(image,graphic_context[n],
1906  graphic_context[n]->clip_mask,exception);
1907  break;
1908  }
1909  if (LocaleCompare("clip-rule",keyword) == 0)
1910  {
1911  ssize_t
1912  fill_rule;
1913 
1914  GetNextToken(q,&q,extent,token);
1916  token);
1917  if (fill_rule == -1)
1918  status=MagickFalse;
1919  else
1920  graphic_context[n]->fill_rule=(FillRule) fill_rule;
1921  break;
1922  }
1923  if (LocaleCompare("clip-units",keyword) == 0)
1924  {
1925  ssize_t
1926  clip_units;
1927 
1928  GetNextToken(q,&q,extent,token);
1930  token);
1931  if (clip_units == -1)
1932  {
1933  status=MagickFalse;
1934  break;
1935  }
1936  graphic_context[n]->clip_units=(ClipPathUnits) clip_units;
1937  if (clip_units == ObjectBoundingBox)
1938  {
1939  GetAffineMatrix(&current);
1940  affine.sx=draw_info->bounds.x2;
1941  affine.sy=draw_info->bounds.y2;
1942  affine.tx=draw_info->bounds.x1;
1943  affine.ty=draw_info->bounds.y1;
1944  break;
1945  }
1946  break;
1947  }
1948  if (LocaleCompare("circle",keyword) == 0)
1949  {
1950  primitive_type=CirclePrimitive;
1951  break;
1952  }
1953  if (LocaleCompare("color",keyword) == 0)
1954  {
1955  primitive_type=ColorPrimitive;
1956  break;
1957  }
1958  status=MagickFalse;
1959  break;
1960  }
1961  case 'd':
1962  case 'D':
1963  {
1964  if (LocaleCompare("decorate",keyword) == 0)
1965  {
1966  ssize_t
1967  decorate;
1968 
1969  GetNextToken(q,&q,extent,token);
1971  token);
1972  if (decorate == -1)
1973  status=MagickFalse;
1974  else
1975  graphic_context[n]->decorate=(DecorationType) decorate;
1976  break;
1977  }
1978  if (LocaleCompare("density",keyword) == 0)
1979  {
1980  GetNextToken(q,&q,extent,token);
1981  (void) CloneString(&graphic_context[n]->density,token);
1982  break;
1983  }
1984  if (LocaleCompare("direction",keyword) == 0)
1985  {
1986  ssize_t
1987  direction;
1988 
1989  GetNextToken(q,&q,extent,token);
1991  token);
1992  if (direction == -1)
1993  status=MagickFalse;
1994  else
1995  graphic_context[n]->direction=(DirectionType) direction;
1996  break;
1997  }
1998  status=MagickFalse;
1999  break;
2000  }
2001  case 'e':
2002  case 'E':
2003  {
2004  if (LocaleCompare("ellipse",keyword) == 0)
2005  {
2006  primitive_type=EllipsePrimitive;
2007  break;
2008  }
2009  if (LocaleCompare("encoding",keyword) == 0)
2010  {
2011  GetNextToken(q,&q,extent,token);
2012  (void) CloneString(&graphic_context[n]->encoding,token);
2013  break;
2014  }
2015  status=MagickFalse;
2016  break;
2017  }
2018  case 'f':
2019  case 'F':
2020  {
2021  if (LocaleCompare("fill",keyword) == 0)
2022  {
2023  GetNextToken(q,&q,extent,token);
2024  (void) FormatLocaleString(pattern,MagickPathExtent,"%s",token);
2025  if (GetImageArtifact(image,pattern) != (const char *) NULL)
2026  (void) DrawPatternPath(image,draw_info,token,
2027  &graphic_context[n]->fill_pattern,exception);
2028  else
2029  {
2030  status&=QueryColorCompliance(token,AllCompliance,
2031  &graphic_context[n]->fill,exception);
2032  if (graphic_context[n]->fill_alpha != OpaqueAlpha)
2033  graphic_context[n]->fill.alpha=graphic_context[n]->fill_alpha;
2034  if (status == MagickFalse)
2035  {
2036  ImageInfo
2037  *pattern_info;
2038 
2039  pattern_info=AcquireImageInfo();
2040  (void) CopyMagickString(pattern_info->filename,token,
2042  graphic_context[n]->fill_pattern=ReadImage(pattern_info,
2043  exception);
2044  CatchException(exception);
2045  pattern_info=DestroyImageInfo(pattern_info);
2046  }
2047  }
2048  break;
2049  }
2050  if (LocaleCompare("fill-opacity",keyword) == 0)
2051  {
2052  GetNextToken(q,&q,extent,token);
2053  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2054  graphic_context[n]->fill.alpha=QuantumRange-ClampToQuantum(
2055  (MagickRealType) QuantumRange*(1.0-factor*StringToDouble(token,
2056  &next_token)));
2057  if (token == next_token)
2058  status=MagickFalse;
2059  break;
2060  }
2061  if (LocaleCompare("fill-rule",keyword) == 0)
2062  {
2063  ssize_t
2064  fill_rule;
2065 
2066  GetNextToken(q,&q,extent,token);
2068  token);
2069  if (fill_rule == -1)
2070  status=MagickFalse;
2071  else
2072  graphic_context[n]->fill_rule=(FillRule) fill_rule;
2073  break;
2074  }
2075  if (LocaleCompare("font",keyword) == 0)
2076  {
2077  GetNextToken(q,&q,extent,token);
2078  (void) CloneString(&graphic_context[n]->font,token);
2079  if (LocaleCompare("none",token) == 0)
2080  graphic_context[n]->font=(char *) RelinquishMagickMemory(
2081  graphic_context[n]->font);
2082  break;
2083  }
2084  if (LocaleCompare("font-family",keyword) == 0)
2085  {
2086  GetNextToken(q,&q,extent,token);
2087  (void) CloneString(&graphic_context[n]->family,token);
2088  break;
2089  }
2090  if (LocaleCompare("font-size",keyword) == 0)
2091  {
2092  GetNextToken(q,&q,extent,token);
2093  graphic_context[n]->pointsize=StringToDouble(token,&next_token);
2094  if (token == next_token)
2095  status=MagickFalse;
2096  break;
2097  }
2098  if (LocaleCompare("font-stretch",keyword) == 0)
2099  {
2100  ssize_t
2101  stretch;
2102 
2103  GetNextToken(q,&q,extent,token);
2105  if (stretch == -1)
2106  status=MagickFalse;
2107  else
2108  graphic_context[n]->stretch=(StretchType) stretch;
2109  break;
2110  }
2111  if (LocaleCompare("font-style",keyword) == 0)
2112  {
2113  ssize_t
2114  style;
2115 
2116  GetNextToken(q,&q,extent,token);
2118  if (style == -1)
2119  status=MagickFalse;
2120  else
2121  graphic_context[n]->style=(StyleType) style;
2122  break;
2123  }
2124  if (LocaleCompare("font-weight",keyword) == 0)
2125  {
2126  ssize_t
2127  weight;
2128 
2129  GetNextToken(q,&q,extent,token);
2131  if (weight == -1)
2132  weight=(ssize_t) StringToUnsignedLong(token);
2133  graphic_context[n]->weight=(size_t) weight;
2134  break;
2135  }
2136  status=MagickFalse;
2137  break;
2138  }
2139  case 'g':
2140  case 'G':
2141  {
2142  if (LocaleCompare("gradient-units",keyword) == 0)
2143  {
2144  GetNextToken(q,&q,extent,token);
2145  break;
2146  }
2147  if (LocaleCompare("gravity",keyword) == 0)
2148  {
2149  ssize_t
2150  gravity;
2151 
2152  GetNextToken(q,&q,extent,token);
2154  if (gravity == -1)
2155  status=MagickFalse;
2156  else
2157  graphic_context[n]->gravity=(GravityType) gravity;
2158  break;
2159  }
2160  status=MagickFalse;
2161  break;
2162  }
2163  case 'i':
2164  case 'I':
2165  {
2166  if (LocaleCompare("image",keyword) == 0)
2167  {
2168  ssize_t
2169  compose;
2170 
2171  primitive_type=ImagePrimitive;
2172  GetNextToken(q,&q,extent,token);
2174  if (compose == -1)
2175  status=MagickFalse;
2176  else
2177  graphic_context[n]->compose=(CompositeOperator) compose;
2178  break;
2179  }
2180  if (LocaleCompare("interline-spacing",keyword) == 0)
2181  {
2182  GetNextToken(q,&q,extent,token);
2183  graphic_context[n]->interline_spacing=StringToDouble(token,
2184  &next_token);
2185  if (token == next_token)
2186  status=MagickFalse;
2187  break;
2188  }
2189  if (LocaleCompare("interword-spacing",keyword) == 0)
2190  {
2191  GetNextToken(q,&q,extent,token);
2192  graphic_context[n]->interword_spacing=StringToDouble(token,
2193  &next_token);
2194  if (token == next_token)
2195  status=MagickFalse;
2196  break;
2197  }
2198  status=MagickFalse;
2199  break;
2200  }
2201  case 'k':
2202  case 'K':
2203  {
2204  if (LocaleCompare("kerning",keyword) == 0)
2205  {
2206  GetNextToken(q,&q,extent,token);
2207  graphic_context[n]->kerning=StringToDouble(token,&next_token);
2208  if (token == next_token)
2209  status=MagickFalse;
2210  break;
2211  }
2212  status=MagickFalse;
2213  break;
2214  }
2215  case 'l':
2216  case 'L':
2217  {
2218  if (LocaleCompare("line",keyword) == 0)
2219  primitive_type=LinePrimitive;
2220  else
2221  status=MagickFalse;
2222  break;
2223  }
2224  case 'o':
2225  case 'O':
2226  {
2227  if (LocaleCompare("offset",keyword) == 0)
2228  {
2229  GetNextToken(q,&q,extent,token);
2230  break;
2231  }
2232  if (LocaleCompare("opacity",keyword) == 0)
2233  {
2234  GetNextToken(q,&q,extent,token);
2235  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2236  graphic_context[n]->fill_alpha=QuantumRange*(1.0-(QuantumScale*
2237  graphic_context[n]->fill_alpha*(1.0-factor*StringToDouble(token,
2238  &next_token))));
2239  graphic_context[n]->stroke_alpha=QuantumRange*(1.0-(QuantumScale*
2240  graphic_context[n]->stroke_alpha*(1.0-factor*StringToDouble(token,
2241  &next_token))));
2242  if (token == next_token)
2243  status=MagickFalse;
2244  break;
2245  }
2246  status=MagickFalse;
2247  break;
2248  }
2249  case 'p':
2250  case 'P':
2251  {
2252  if (LocaleCompare("path",keyword) == 0)
2253  {
2254  primitive_type=PathPrimitive;
2255  break;
2256  }
2257  if (LocaleCompare("point",keyword) == 0)
2258  {
2259  primitive_type=PointPrimitive;
2260  break;
2261  }
2262  if (LocaleCompare("polyline",keyword) == 0)
2263  {
2264  primitive_type=PolylinePrimitive;
2265  break;
2266  }
2267  if (LocaleCompare("polygon",keyword) == 0)
2268  {
2269  primitive_type=PolygonPrimitive;
2270  break;
2271  }
2272  if (LocaleCompare("pop",keyword) == 0)
2273  {
2274  GetNextToken(q,&q,extent,token);
2275  if (LocaleCompare("clip-path",token) == 0)
2276  break;
2277  if (LocaleCompare("defs",token) == 0)
2278  break;
2279  if (LocaleCompare("gradient",token) == 0)
2280  break;
2281  if (LocaleCompare("graphic-context",token) == 0)
2282  {
2283  if (n <= 0)
2284  {
2285  (void) ThrowMagickException(exception,GetMagickModule(),
2286  DrawError,"UnbalancedGraphicContextPushPop","`%s'",token);
2287  status=MagickFalse;
2288  n=0;
2289  break;
2290  }
2291  if (graphic_context[n]->clip_mask != (char *) NULL)
2292  if (LocaleCompare(graphic_context[n]->clip_mask,
2293  graphic_context[n-1]->clip_mask) != 0)
2294  (void) SetImageMask(image,ReadPixelMask,(Image *) NULL,
2295  exception);
2296  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
2297  n--;
2298  break;
2299  }
2300  if (LocaleCompare("pattern",token) == 0)
2301  break;
2302  status=MagickFalse;
2303  break;
2304  }
2305  if (LocaleCompare("push",keyword) == 0)
2306  {
2307  GetNextToken(q,&q,extent,token);
2308  if (LocaleCompare("clip-path",token) == 0)
2309  {
2310  char
2311  name[MagickPathExtent];
2312 
2313  GetNextToken(q,&q,extent,token);
2314  (void) FormatLocaleString(name,MagickPathExtent,"%s",token);
2315  for (p=q; *q != '\0'; )
2316  {
2317  GetNextToken(q,&q,extent,token);
2318  if (LocaleCompare(token,"pop") != 0)
2319  continue;
2320  GetNextToken(q,(const char **) NULL,extent,token);
2321  if (LocaleCompare(token,"clip-path") != 0)
2322  continue;
2323  break;
2324  }
2325  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2326  (void) SetImageArtifact(image,name,token);
2327  GetNextToken(q,&q,extent,token);
2328  break;
2329  }
2330  if (LocaleCompare("gradient",token) == 0)
2331  {
2332  char
2333  key[2*MagickPathExtent],
2334  name[MagickPathExtent],
2335  type[MagickPathExtent];
2336 
2337  SegmentInfo
2338  segment;
2339 
2340  GetNextToken(q,&q,extent,token);
2341  (void) CopyMagickString(name,token,MagickPathExtent);
2342  GetNextToken(q,&q,extent,token);
2343  (void) CopyMagickString(type,token,MagickPathExtent);
2344  GetNextToken(q,&q,extent,token);
2345  segment.x1=StringToDouble(token,&next_token);
2346  if (token == next_token)
2347  status=MagickFalse;
2348  GetNextToken(q,&q,extent,token);
2349  if (*token == ',')
2350  GetNextToken(q,&q,extent,token);
2351  segment.y1=StringToDouble(token,&next_token);
2352  if (token == next_token)
2353  status=MagickFalse;
2354  GetNextToken(q,&q,extent,token);
2355  if (*token == ',')
2356  GetNextToken(q,&q,extent,token);
2357  segment.x2=StringToDouble(token,&next_token);
2358  if (token == next_token)
2359  status=MagickFalse;
2360  GetNextToken(q,&q,extent,token);
2361  if (*token == ',')
2362  GetNextToken(q,&q,extent,token);
2363  segment.y2=StringToDouble(token,&next_token);
2364  if (token == next_token)
2365  status=MagickFalse;
2366  if (LocaleCompare(type,"radial") == 0)
2367  {
2368  GetNextToken(q,&q,extent,token);
2369  if (*token == ',')
2370  GetNextToken(q,&q,extent,token);
2371  }
2372  for (p=q; *q != '\0'; )
2373  {
2374  GetNextToken(q,&q,extent,token);
2375  if (LocaleCompare(token,"pop") != 0)
2376  continue;
2377  GetNextToken(q,(const char **) NULL,extent,token);
2378  if (LocaleCompare(token,"gradient") != 0)
2379  continue;
2380  break;
2381  }
2382  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2383  bounds.x1=graphic_context[n]->affine.sx*segment.x1+
2384  graphic_context[n]->affine.ry*segment.y1+
2385  graphic_context[n]->affine.tx;
2386  bounds.y1=graphic_context[n]->affine.rx*segment.x1+
2387  graphic_context[n]->affine.sy*segment.y1+
2388  graphic_context[n]->affine.ty;
2389  bounds.x2=graphic_context[n]->affine.sx*segment.x2+
2390  graphic_context[n]->affine.ry*segment.y2+
2391  graphic_context[n]->affine.tx;
2392  bounds.y2=graphic_context[n]->affine.rx*segment.x2+
2393  graphic_context[n]->affine.sy*segment.y2+
2394  graphic_context[n]->affine.ty;
2395  (void) FormatLocaleString(key,MagickPathExtent,"%s",name);
2396  (void) SetImageArtifact(image,key,token);
2397  (void) FormatLocaleString(key,MagickPathExtent,"%s-type",name);
2398  (void) SetImageArtifact(image,key,type);
2399  (void) FormatLocaleString(key,MagickPathExtent,"%s-geometry",
2400  name);
2401  (void) FormatLocaleString(geometry,MagickPathExtent,
2402  "%gx%g%+.15g%+.15g",
2403  MagickMax(fabs(bounds.x2-bounds.x1+1.0),1.0),
2404  MagickMax(fabs(bounds.y2-bounds.y1+1.0),1.0),
2405  bounds.x1,bounds.y1);
2406  (void) SetImageArtifact(image,key,geometry);
2407  GetNextToken(q,&q,extent,token);
2408  break;
2409  }
2410  if (LocaleCompare("pattern",token) == 0)
2411  {
2412  char
2413  key[2*MagickPathExtent],
2414  name[MagickPathExtent];
2415 
2417  pattern_bounds;
2418 
2419  GetNextToken(q,&q,extent,token);
2420  (void) CopyMagickString(name,token,MagickPathExtent);
2421  GetNextToken(q,&q,extent,token);
2422  pattern_bounds.x=(ssize_t) ceil(StringToDouble(token,
2423  &next_token)-0.5);
2424  if (token == next_token)
2425  status=MagickFalse;
2426  GetNextToken(q,&q,extent,token);
2427  if (*token == ',')
2428  GetNextToken(q,&q,extent,token);
2429  pattern_bounds.y=(ssize_t) ceil(StringToDouble(token,
2430  &next_token)-0.5);
2431  if (token == next_token)
2432  status=MagickFalse;
2433  GetNextToken(q,&q,extent,token);
2434  if (*token == ',')
2435  GetNextToken(q,&q,extent,token);
2436  pattern_bounds.width=(size_t) floor(StringToDouble(token,
2437  &next_token)+0.5);
2438  if (token == next_token)
2439  status=MagickFalse;
2440  GetNextToken(q,&q,extent,token);
2441  if (*token == ',')
2442  GetNextToken(q,&q,extent,token);
2443  pattern_bounds.height=(size_t) floor(StringToDouble(token,
2444  &next_token)+0.5);
2445  if (token == next_token)
2446  status=MagickFalse;
2447  for (p=q; *q != '\0'; )
2448  {
2449  GetNextToken(q,&q,extent,token);
2450  if (LocaleCompare(token,"pop") != 0)
2451  continue;
2452  GetNextToken(q,(const char **) NULL,extent,token);
2453  if (LocaleCompare(token,"pattern") != 0)
2454  continue;
2455  break;
2456  }
2457  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2458  (void) FormatLocaleString(key,MagickPathExtent,"%s",name);
2459  (void) SetImageArtifact(image,key,token);
2460  (void) FormatLocaleString(key,MagickPathExtent,"%s-geometry",
2461  name);
2462  (void) FormatLocaleString(geometry,MagickPathExtent,
2463  "%.20gx%.20g%+.20g%+.20g",(double)pattern_bounds.width,
2464  (double)pattern_bounds.height,(double)pattern_bounds.x,
2465  (double)pattern_bounds.y);
2466  (void) SetImageArtifact(image,key,geometry);
2467  GetNextToken(q,&q,extent,token);
2468  break;
2469  }
2470  if (LocaleCompare("graphic-context",token) == 0)
2471  {
2472  n++;
2473  graphic_context=(DrawInfo **) ResizeQuantumMemory(
2474  graphic_context,(size_t) (n+1),sizeof(*graphic_context));
2475  if (graphic_context == (DrawInfo **) NULL)
2476  {
2477  (void) ThrowMagickException(exception,GetMagickModule(),
2478  ResourceLimitError,"MemoryAllocationFailed","`%s'",
2479  image->filename);
2480  break;
2481  }
2482  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,
2483  graphic_context[n-1]);
2484  break;
2485  }
2486  if (LocaleCompare("defs",token) == 0)
2487  break;
2488  status=MagickFalse;
2489  break;
2490  }
2491  status=MagickFalse;
2492  break;
2493  }
2494  case 'r':
2495  case 'R':
2496  {
2497  if (LocaleCompare("rectangle",keyword) == 0)
2498  {
2499  primitive_type=RectanglePrimitive;
2500  break;
2501  }
2502  if (LocaleCompare("rotate",keyword) == 0)
2503  {
2504  GetNextToken(q,&q,extent,token);
2505  angle=StringToDouble(token,&next_token);
2506  if (token == next_token)
2507  status=MagickFalse;
2508  affine.sx=cos(DegreesToRadians(fmod((double) angle,360.0)));
2509  affine.rx=sin(DegreesToRadians(fmod((double) angle,360.0)));
2510  affine.ry=(-sin(DegreesToRadians(fmod((double) angle,360.0))));
2511  affine.sy=cos(DegreesToRadians(fmod((double) angle,360.0)));
2512  break;
2513  }
2514  if (LocaleCompare("roundRectangle",keyword) == 0)
2515  {
2516  primitive_type=RoundRectanglePrimitive;
2517  break;
2518  }
2519  status=MagickFalse;
2520  break;
2521  }
2522  case 's':
2523  case 'S':
2524  {
2525  if (LocaleCompare("scale",keyword) == 0)
2526  {
2527  GetNextToken(q,&q,extent,token);
2528  affine.sx=StringToDouble(token,&next_token);
2529  if (token == next_token)
2530  status=MagickFalse;
2531  GetNextToken(q,&q,extent,token);
2532  if (*token == ',')
2533  GetNextToken(q,&q,extent,token);
2534  affine.sy=StringToDouble(token,&next_token);
2535  if (token == next_token)
2536  status=MagickFalse;
2537  break;
2538  }
2539  if (LocaleCompare("skewX",keyword) == 0)
2540  {
2541  GetNextToken(q,&q,extent,token);
2542  angle=StringToDouble(token,&next_token);
2543  if (token == next_token)
2544  status=MagickFalse;
2545  affine.ry=sin(DegreesToRadians(angle));
2546  break;
2547  }
2548  if (LocaleCompare("skewY",keyword) == 0)
2549  {
2550  GetNextToken(q,&q,extent,token);
2551  angle=StringToDouble(token,&next_token);
2552  if (token == next_token)
2553  status=MagickFalse;
2554  affine.rx=(-tan(DegreesToRadians(angle)/2.0));
2555  break;
2556  }
2557  if (LocaleCompare("stop-color",keyword) == 0)
2558  {
2559  PixelInfo
2560  stop_color;
2561 
2562  number_stops++;
2563  if (number_stops == 1)
2564  stops=(StopInfo *) AcquireQuantumMemory(2,sizeof(*stops));
2565  else if (number_stops > 2)
2566  stops=(StopInfo *) ResizeQuantumMemory(stops,number_stops,
2567  sizeof(*stops));
2568  if (stops == (StopInfo *) NULL)
2569  {
2570  (void) ThrowMagickException(exception,GetMagickModule(),
2571  ResourceLimitError,"MemoryAllocationFailed","`%s'",
2572  image->filename);
2573  break;
2574  }
2575  GetNextToken(q,&q,extent,token);
2576  (void) QueryColorCompliance(token,AllCompliance,&stop_color,
2577  exception);
2578  stops[number_stops-1].color=stop_color;
2579  GetNextToken(q,&q,extent,token);
2580  stops[number_stops-1].offset=StringToDouble(token,&next_token);
2581  if (token == next_token)
2582  status=MagickFalse;
2583  break;
2584  }
2585  if (LocaleCompare("stroke",keyword) == 0)
2586  {
2587  GetNextToken(q,&q,extent,token);
2588  (void) FormatLocaleString(pattern,MagickPathExtent,"%s",token);
2589  if (GetImageArtifact(image,pattern) != (const char *) NULL)
2590  (void) DrawPatternPath(image,draw_info,token,
2591  &graphic_context[n]->stroke_pattern,exception);
2592  else
2593  {
2594  status&=QueryColorCompliance(token,AllCompliance,
2595  &graphic_context[n]->stroke,exception);
2596  if (graphic_context[n]->stroke_alpha != OpaqueAlpha)
2597  graphic_context[n]->stroke.alpha=
2598  graphic_context[n]->stroke_alpha;
2599  if (status == MagickFalse)
2600  {
2601  ImageInfo
2602  *pattern_info;
2603 
2604  pattern_info=AcquireImageInfo();
2605  (void) CopyMagickString(pattern_info->filename,token,
2607  graphic_context[n]->stroke_pattern=ReadImage(pattern_info,
2608  exception);
2609  CatchException(exception);
2610  pattern_info=DestroyImageInfo(pattern_info);
2611  }
2612  }
2613  break;
2614  }
2615  if (LocaleCompare("stroke-antialias",keyword) == 0)
2616  {
2617  GetNextToken(q,&q,extent,token);
2618  graphic_context[n]->stroke_antialias=
2619  StringToLong(token) != 0 ? MagickTrue : MagickFalse;
2620  break;
2621  }
2622  if (LocaleCompare("stroke-dasharray",keyword) == 0)
2623  {
2624  if (graphic_context[n]->dash_pattern != (double *) NULL)
2625  graphic_context[n]->dash_pattern=(double *)
2626  RelinquishMagickMemory(graphic_context[n]->dash_pattern);
2627  if (IsPoint(q) != MagickFalse)
2628  {
2629  const char
2630  *r;
2631 
2632  r=q;
2633  GetNextToken(r,&r,extent,token);
2634  if (*token == ',')
2635  GetNextToken(r,&r,extent,token);
2636  for (x=0; IsPoint(token) != MagickFalse; x++)
2637  {
2638  GetNextToken(r,&r,extent,token);
2639  if (*token == ',')
2640  GetNextToken(r,&r,extent,token);
2641  }
2642  graphic_context[n]->dash_pattern=(double *)
2643  AcquireQuantumMemory((size_t) (2UL*x+1UL),
2644  sizeof(*graphic_context[n]->dash_pattern));
2645  if (graphic_context[n]->dash_pattern == (double *) NULL)
2646  {
2647  (void) ThrowMagickException(exception,GetMagickModule(),
2648  ResourceLimitError,"MemoryAllocationFailed","`%s'",
2649  image->filename);
2650  status=MagickFalse;
2651  break;
2652  }
2653  for (j=0; j < x; j++)
2654  {
2655  GetNextToken(q,&q,extent,token);
2656  if (*token == ',')
2657  GetNextToken(q,&q,extent,token);
2658  graphic_context[n]->dash_pattern[j]=StringToDouble(token,
2659  &next_token);
2660  if (token == next_token)
2661  status=MagickFalse;
2662  if (graphic_context[n]->dash_pattern[j] < 0.0)
2663  status=MagickFalse;
2664  }
2665  if ((x & 0x01) != 0)
2666  for ( ; j < (2*x); j++)
2667  graphic_context[n]->dash_pattern[j]=
2668  graphic_context[n]->dash_pattern[j-x];
2669  graphic_context[n]->dash_pattern[j]=0.0;
2670  break;
2671  }
2672  GetNextToken(q,&q,extent,token);
2673  break;
2674  }
2675  if (LocaleCompare("stroke-dashoffset",keyword) == 0)
2676  {
2677  GetNextToken(q,&q,extent,token);
2678  graphic_context[n]->dash_offset=StringToDouble(token,
2679  &next_token);
2680  if (token == next_token)
2681  status=MagickFalse;
2682  break;
2683  }
2684  if (LocaleCompare("stroke-linecap",keyword) == 0)
2685  {
2686  ssize_t
2687  linecap;
2688 
2689  GetNextToken(q,&q,extent,token);
2691  if (linecap == -1)
2692  status=MagickFalse;
2693  else
2694  graphic_context[n]->linecap=(LineCap) linecap;
2695  break;
2696  }
2697  if (LocaleCompare("stroke-linejoin",keyword) == 0)
2698  {
2699  ssize_t
2700  linejoin;
2701 
2702  GetNextToken(q,&q,extent,token);
2704  token);
2705  if (linejoin == -1)
2706  status=MagickFalse;
2707  else
2708  graphic_context[n]->linejoin=(LineJoin) linejoin;
2709  break;
2710  }
2711  if (LocaleCompare("stroke-miterlimit",keyword) == 0)
2712  {
2713  GetNextToken(q,&q,extent,token);
2714  graphic_context[n]->miterlimit=StringToUnsignedLong(token);
2715  break;
2716  }
2717  if (LocaleCompare("stroke-opacity",keyword) == 0)
2718  {
2719  GetNextToken(q,&q,extent,token);
2720  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2721  graphic_context[n]->stroke.alpha=QuantumRange-ClampToQuantum(
2722  (MagickRealType) QuantumRange*(1.0-factor*StringToDouble(token,
2723  &next_token)));
2724  if (token == next_token)
2725  status=MagickFalse;
2726  break;
2727  }
2728  if (LocaleCompare("stroke-width",keyword) == 0)
2729  {
2730  GetNextToken(q,&q,extent,token);
2731  graphic_context[n]->stroke_width=StringToDouble(token,&next_token);
2732  if (token == next_token)
2733  status=MagickFalse;
2734  break;
2735  }
2736  status=MagickFalse;
2737  break;
2738  }
2739  case 't':
2740  case 'T':
2741  {
2742  if (LocaleCompare("text",keyword) == 0)
2743  {
2744  primitive_type=TextPrimitive;
2745  break;
2746  }
2747  if (LocaleCompare("text-align",keyword) == 0)
2748  {
2749  ssize_t
2750  align;
2751 
2752  GetNextToken(q,&q,extent,token);
2754  if (align == -1)
2755  status=MagickFalse;
2756  else
2757  graphic_context[n]->align=(AlignType) align;
2758  break;
2759  }
2760  if (LocaleCompare("text-anchor",keyword) == 0)
2761  {
2762  ssize_t
2763  align;
2764 
2765  GetNextToken(q,&q,extent,token);
2767  if (align == -1)
2768  status=MagickFalse;
2769  else
2770  graphic_context[n]->align=(AlignType) align;
2771  break;
2772  }
2773  if (LocaleCompare("text-antialias",keyword) == 0)
2774  {
2775  GetNextToken(q,&q,extent,token);
2776  graphic_context[n]->text_antialias=StringToLong(token) != 0 ?
2778  break;
2779  }
2780  if (LocaleCompare("text-undercolor",keyword) == 0)
2781  {
2782  GetNextToken(q,&q,extent,token);
2783  (void) QueryColorCompliance(token,AllCompliance,
2784  &graphic_context[n]->undercolor,exception);
2785  break;
2786  }
2787  if (LocaleCompare("translate",keyword) == 0)
2788  {
2789  GetNextToken(q,&q,extent,token);
2790  affine.tx=StringToDouble(token,&next_token);
2791  if (token == next_token)
2792  status=MagickFalse;
2793  GetNextToken(q,&q,extent,token);
2794  if (*token == ',')
2795  GetNextToken(q,&q,extent,token);
2796  affine.ty=StringToDouble(token,&next_token);
2797  if (token == next_token)
2798  status=MagickFalse;
2799  break;
2800  }
2801  status=MagickFalse;
2802  break;
2803  }
2804  case 'v':
2805  case 'V':
2806  {
2807  if (LocaleCompare("viewbox",keyword) == 0)
2808  {
2809  GetNextToken(q,&q,extent,token);
2810  graphic_context[n]->viewbox.x=(ssize_t) ceil(StringToDouble(token,
2811  &next_token)-0.5);
2812  if (token == next_token)
2813  status=MagickFalse;
2814  GetNextToken(q,&q,extent,token);
2815  if (*token == ',')
2816  GetNextToken(q,&q,extent,token);
2817  graphic_context[n]->viewbox.y=(ssize_t) ceil(StringToDouble(token,
2818  &next_token)-0.5);
2819  if (token == next_token)
2820  status=MagickFalse;
2821  GetNextToken(q,&q,extent,token);
2822  if (*token == ',')
2823  GetNextToken(q,&q,extent,token);
2824  graphic_context[n]->viewbox.width=(size_t) floor(StringToDouble(
2825  token,&next_token)+0.5);
2826  if (token == next_token)
2827  status=MagickFalse;
2828  GetNextToken(q,&q,extent,token);
2829  if (*token == ',')
2830  GetNextToken(q,&q,extent,token);
2831  graphic_context[n]->viewbox.height=(size_t) floor(StringToDouble(
2832  token,&next_token)+0.5);
2833  if (token == next_token)
2834  status=MagickFalse;
2835  break;
2836  }
2837  status=MagickFalse;
2838  break;
2839  }
2840  default:
2841  {
2842  status=MagickFalse;
2843  break;
2844  }
2845  }
2846  if (status == MagickFalse)
2847  break;
2848  if ((fabs(affine.sx-1.0) >= DrawEpsilon) ||
2849  (fabs(affine.rx) >= DrawEpsilon) || (fabs(affine.ry) >= DrawEpsilon) ||
2850  (fabs(affine.sy-1.0) >= DrawEpsilon) ||
2851  (fabs(affine.tx) >= DrawEpsilon) || (fabs(affine.ty) >= DrawEpsilon))
2852  {
2853  graphic_context[n]->affine.sx=current.sx*affine.sx+current.ry*affine.rx;
2854  graphic_context[n]->affine.rx=current.rx*affine.sx+current.sy*affine.rx;
2855  graphic_context[n]->affine.ry=current.sx*affine.ry+current.ry*affine.sy;
2856  graphic_context[n]->affine.sy=current.rx*affine.ry+current.sy*affine.sy;
2857  graphic_context[n]->affine.tx=current.sx*affine.tx+current.ry*affine.ty+
2858  current.tx;
2859  graphic_context[n]->affine.ty=current.rx*affine.tx+current.sy*affine.ty+
2860  current.ty;
2861  }
2862  if (primitive_type == UndefinedPrimitive)
2863  {
2864  if (*q == '\0')
2865  {
2866  if (number_stops > 1)
2867  {
2868  GradientType
2869  type;
2870 
2871  type=LinearGradient;
2872  if (draw_info->gradient.type == RadialGradient)
2873  type=RadialGradient;
2874  (void) GradientImage(image,type,PadSpread,stops,number_stops,
2875  exception);
2876  }
2877  if (number_stops > 0)
2878  stops=(StopInfo *) RelinquishMagickMemory(stops);
2879  }
2880  if (image->debug != MagickFalse)
2881  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int)
2882  (q-p),p);
2883  continue;
2884  }
2885  /*
2886  Parse the primitive attributes.
2887  */
2888  i=0;
2889  j=0;
2890  primitive_info[0].point.x=0.0;
2891  primitive_info[0].point.y=0.0;
2892  for (x=0; *q != '\0'; x++)
2893  {
2894  /*
2895  Define points.
2896  */
2897  if (IsPoint(q) == MagickFalse)
2898  break;
2899  GetNextToken(q,&q,extent,token);
2900  point.x=StringToDouble(token,&next_token);
2901  if (token == next_token)
2902  status=MagickFalse;
2903  GetNextToken(q,&q,extent,token);
2904  if (*token == ',')
2905  GetNextToken(q,&q,extent,token);
2906  point.y=StringToDouble(token,&next_token);
2907  if (token == next_token)
2908  status=MagickFalse;
2909  GetNextToken(q,(const char **) NULL,extent,token);
2910  if (*token == ',')
2911  GetNextToken(q,&q,extent,token);
2912  primitive_info[i].primitive=primitive_type;
2913  primitive_info[i].point=point;
2914  primitive_info[i].coordinates=0;
2915  primitive_info[i].method=FloodfillMethod;
2916  i++;
2917  if (i < (ssize_t) number_points)
2918  continue;
2919  number_points<<=1;
2920  primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(primitive_info,
2921  (size_t) number_points,sizeof(*primitive_info));
2922  if ((primitive_info == (PrimitiveInfo *) NULL) ||
2923  (number_points != (MagickSizeType) ((size_t) number_points)))
2924  {
2925  (void) ThrowMagickException(exception,GetMagickModule(),
2926  ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
2927  break;
2928  }
2929  }
2930  primitive_info[j].primitive=primitive_type;
2931  primitive_info[j].coordinates=(size_t) x;
2932  primitive_info[j].method=FloodfillMethod;
2933  primitive_info[j].text=(char *) NULL;
2934  /*
2935  Circumscribe primitive within a circle.
2936  */
2937  bounds.x1=primitive_info[j].point.x;
2938  bounds.y1=primitive_info[j].point.y;
2939  bounds.x2=primitive_info[j].point.x;
2940  bounds.y2=primitive_info[j].point.y;
2941  for (k=1; k < (ssize_t) primitive_info[j].coordinates; k++)
2942  {
2943  point=primitive_info[j+k].point;
2944  if (point.x < bounds.x1)
2945  bounds.x1=point.x;
2946  if (point.y < bounds.y1)
2947  bounds.y1=point.y;
2948  if (point.x > bounds.x2)
2949  bounds.x2=point.x;
2950  if (point.y > bounds.y2)
2951  bounds.y2=point.y;
2952  }
2953  /*
2954  Speculate how many points our primitive might consume.
2955  */
2956  length=primitive_info[j].coordinates;
2957  switch (primitive_type)
2958  {
2959  case RectanglePrimitive:
2960  {
2961  length*=5;
2962  break;
2963  }
2965  {
2966  double
2967  alpha,
2968  beta,
2969  radius;
2970 
2971  alpha=bounds.x2-bounds.x1;
2972  beta=bounds.y2-bounds.y1;
2973  radius=hypot((double) alpha,(double) beta);
2974  length*=5;
2975  length+=2*((size_t) ceil((double) MagickPI*radius))+6*BezierQuantum+360;
2976  break;
2977  }
2978  case BezierPrimitive:
2979  {
2980  if (primitive_info[j].coordinates > 107)
2981  (void) ThrowMagickException(exception,GetMagickModule(),DrawError,
2982  "TooManyBezierCoordinates","`%s'",token);
2983  length=BezierQuantum*primitive_info[j].coordinates;
2984  break;
2985  }
2986  case PathPrimitive:
2987  {
2988  char
2989  *s,
2990  *t;
2991 
2992  GetNextToken(q,&q,extent,token);
2993  length=1;
2994  t=token;
2995  for (s=token; *s != '\0'; s=t)
2996  {
2997  double
2998  value;
2999 
3000  value=StringToDouble(s,&t);
3001  (void) value;
3002  if (s == t)
3003  {
3004  t++;
3005  continue;
3006  }
3007  length++;
3008  }
3009  length=length*BezierQuantum;
3010  break;
3011  }
3012  case CirclePrimitive:
3013  case ArcPrimitive:
3014  case EllipsePrimitive:
3015  {
3016  double
3017  alpha,
3018  beta,
3019  radius;
3020 
3021  alpha=bounds.x2-bounds.x1;
3022  beta=bounds.y2-bounds.y1;
3023  radius=hypot((double) alpha,(double) beta);
3024  length=2*((size_t) ceil((double) MagickPI*radius))+6*BezierQuantum+360;
3025  break;
3026  }
3027  default:
3028  break;
3029  }
3030  if ((i+length) >= number_points)
3031  {
3032  /*
3033  Resize based on speculative points required by primitive.
3034  */
3035  number_points+=length+1;
3036  primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(primitive_info,
3037  (size_t) number_points,sizeof(*primitive_info));
3038  if ((primitive_info == (PrimitiveInfo *) NULL) ||
3039  (number_points != (MagickSizeType) ((size_t) number_points)))
3040  {
3041  (void) ThrowMagickException(exception,GetMagickModule(),
3042  ResourceLimitError,"MemoryAllocationFailed","`%s'",
3043  image->filename);
3044  break;
3045  }
3046  }
3047  switch (primitive_type)
3048  {
3049  case PointPrimitive:
3050  default:
3051  {
3052  if (primitive_info[j].coordinates != 1)
3053  {
3054  status=MagickFalse;
3055  break;
3056  }
3057  TracePoint(primitive_info+j,primitive_info[j].point);
3058  i=(ssize_t) (j+primitive_info[j].coordinates);
3059  break;
3060  }
3061  case LinePrimitive:
3062  {
3063  if (primitive_info[j].coordinates != 2)
3064  {
3065  status=MagickFalse;
3066  break;
3067  }
3068  TraceLine(primitive_info+j,primitive_info[j].point,
3069  primitive_info[j+1].point);
3070  i=(ssize_t) (j+primitive_info[j].coordinates);
3071  break;
3072  }
3073  case RectanglePrimitive:
3074  {
3075  if (primitive_info[j].coordinates != 2)
3076  {
3077  status=MagickFalse;
3078  break;
3079  }
3080  TraceRectangle(primitive_info+j,primitive_info[j].point,
3081  primitive_info[j+1].point);
3082  i=(ssize_t) (j+primitive_info[j].coordinates);
3083  break;
3084  }
3086  {
3087  if (primitive_info[j].coordinates != 3)
3088  {
3089  status=MagickFalse;
3090  break;
3091  }
3092  TraceRoundRectangle(primitive_info+j,primitive_info[j].point,
3093  primitive_info[j+1].point,primitive_info[j+2].point);
3094  i=(ssize_t) (j+primitive_info[j].coordinates);
3095  break;
3096  }
3097  case ArcPrimitive:
3098  {
3099  if (primitive_info[j].coordinates != 3)
3100  {
3101  primitive_type=UndefinedPrimitive;
3102  break;
3103  }
3104  TraceArc(primitive_info+j,primitive_info[j].point,
3105  primitive_info[j+1].point,primitive_info[j+2].point);
3106  i=(ssize_t) (j+primitive_info[j].coordinates);
3107  break;
3108  }
3109  case EllipsePrimitive:
3110  {
3111  if (primitive_info[j].coordinates != 3)
3112  {
3113  status=MagickFalse;
3114  break;
3115  }
3116  TraceEllipse(primitive_info+j,primitive_info[j].point,
3117  primitive_info[j+1].point,primitive_info[j+2].point);
3118  i=(ssize_t) (j+primitive_info[j].coordinates);
3119  break;
3120  }
3121  case CirclePrimitive:
3122  {
3123  if (primitive_info[j].coordinates != 2)
3124  {
3125  status=MagickFalse;
3126  break;
3127  }
3128  TraceCircle(primitive_info+j,primitive_info[j].point,
3129  primitive_info[j+1].point);
3130  i=(ssize_t) (j+primitive_info[j].coordinates);
3131  break;
3132  }
3133  case PolylinePrimitive:
3134  break;
3135  case PolygonPrimitive:
3136  {
3137  primitive_info[i]=primitive_info[j];
3138  primitive_info[i].coordinates=0;
3139  primitive_info[j].coordinates++;
3140  i++;
3141  break;
3142  }
3143  case BezierPrimitive:
3144  {
3145  if (primitive_info[j].coordinates < 3)
3146  {
3147  status=MagickFalse;
3148  break;
3149  }
3150  TraceBezier(primitive_info+j,primitive_info[j].coordinates);
3151  i=(ssize_t) (j+primitive_info[j].coordinates);
3152  break;
3153  }
3154  case PathPrimitive:
3155  {
3156  i=(ssize_t) (j+TracePath(primitive_info+j,token));
3157  break;
3158  }
3159  case AlphaPrimitive:
3160  case ColorPrimitive:
3161  {
3162  ssize_t
3163  method;
3164 
3165  if (primitive_info[j].coordinates != 1)
3166  {
3167  status=MagickFalse;
3168  break;
3169  }
3170  GetNextToken(q,&q,extent,token);
3172  if (method == -1)
3173  status=MagickFalse;
3174  else
3175  primitive_info[j].method=(PaintMethod) method;
3176  break;
3177  }
3178  case TextPrimitive:
3179  {
3180  if (primitive_info[j].coordinates != 1)
3181  {
3182  status=MagickFalse;
3183  break;
3184  }
3185  if (*token != ',')
3186  GetNextToken(q,&q,extent,token);
3187  primitive_info[j].text=AcquireString(token);
3188  break;
3189  }
3190  case ImagePrimitive:
3191  {
3192  if (primitive_info[j].coordinates != 2)
3193  {
3194  status=MagickFalse;
3195  break;
3196  }
3197  GetNextToken(q,&q,extent,token);
3198  primitive_info[j].text=AcquireString(token);
3199  break;
3200  }
3201  }
3202  if (primitive_info == (PrimitiveInfo *) NULL)
3203  break;
3204  if (image->debug != MagickFalse)
3205  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int) (q-p),p);
3206  if (status == MagickFalse)
3207  break;
3208  primitive_info[i].primitive=UndefinedPrimitive;
3209  if (i == 0)
3210  continue;
3211  /*
3212  Transform points.
3213  */
3214  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
3215  {
3216  point=primitive_info[i].point;
3217  primitive_info[i].point.x=graphic_context[n]->affine.sx*point.x+
3218  graphic_context[n]->affine.ry*point.y+graphic_context[n]->affine.tx;
3219  primitive_info[i].point.y=graphic_context[n]->affine.rx*point.x+
3220  graphic_context[n]->affine.sy*point.y+graphic_context[n]->affine.ty;
3221  point=primitive_info[i].point;
3222  if (point.x < graphic_context[n]->bounds.x1)
3223  graphic_context[n]->bounds.x1=point.x;
3224  if (point.y < graphic_context[n]->bounds.y1)
3225  graphic_context[n]->bounds.y1=point.y;
3226  if (point.x > graphic_context[n]->bounds.x2)
3227  graphic_context[n]->bounds.x2=point.x;
3228  if (point.y > graphic_context[n]->bounds.y2)
3229  graphic_context[n]->bounds.y2=point.y;
3230  if (primitive_info[i].primitive == ImagePrimitive)
3231  break;
3232  if (i >= (ssize_t) number_points)
3233  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
3234  }
3235  if (graphic_context[n]->render != MagickFalse)
3236  {
3237  if ((n != 0) && (graphic_context[n]->clip_mask != (char *) NULL) &&
3238  (LocaleCompare(graphic_context[n]->clip_mask,
3239  graphic_context[n-1]->clip_mask) != 0))
3240  status&=DrawClipPath(image,graphic_context[n],
3241  graphic_context[n]->clip_mask,exception);
3242  status&=DrawPrimitive(image,graphic_context[n],primitive_info,
3243  exception);
3244  }
3245  if (primitive_info->text != (char *) NULL)
3246  primitive_info->text=(char *) RelinquishMagickMemory(
3247  primitive_info->text);
3248  proceed=SetImageProgress(image,RenderImageTag,q-primitive,(MagickSizeType)
3249  primitive_extent);
3250  if (proceed == MagickFalse)
3251  break;
3252  if (status == 0)
3253  break;
3254  }
3255  if (image->debug != MagickFalse)
3256  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end draw-image");
3257  /*
3258  Relinquish resources.
3259  */
3260  token=DestroyString(token);
3261  if (primitive_info != (PrimitiveInfo *) NULL)
3262  primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(primitive_info);
3263  primitive=DestroyString(primitive);
3264  for ( ; n >= 0; n--)
3265  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
3266  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
3267  if (status == MagickFalse)
3268  ThrowBinaryException(DrawError,"NonconformingDrawingPrimitiveDefinition",
3269  keyword);
3270  return(status != 0 ? MagickTrue : MagickFalse);
3271 }
3272 
3273 /*
3274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3275 % %
3276 % %
3277 % %
3278 % D r a w G r a d i e n t I m a g e %
3279 % %
3280 % %
3281 % %
3282 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3283 %
3284 % DrawGradientImage() draws a linear gradient on the image.
3285 %
3286 % The format of the DrawGradientImage method is:
3287 %
3288 % MagickBooleanType DrawGradientImage(Image *image,
3289 % const DrawInfo *draw_info,ExceptionInfo *exception)
3290 %
3291 % A description of each parameter follows:
3292 %
3293 % o image: the image.
3294 %
3295 % o draw_info: the draw info.
3296 %
3297 % o exception: return any errors or warnings in this structure.
3298 %
3299 */
3300 
3301 static inline double GetStopColorOffset(const GradientInfo *gradient,
3302  const ssize_t x,const ssize_t y)
3303 {
3304  switch (gradient->type)
3305  {
3306  case UndefinedGradient:
3307  case LinearGradient:
3308  {
3309  double
3310  gamma,
3311  length,
3312  offset,
3313  scale;
3314 
3315  PointInfo
3316  p,
3317  q;
3318 
3319  const SegmentInfo
3320  *gradient_vector;
3321 
3322  gradient_vector=(&gradient->gradient_vector);
3323  p.x=gradient_vector->x2-gradient_vector->x1;
3324  p.y=gradient_vector->y2-gradient_vector->y1;
3325  q.x=(double) x-gradient_vector->x1;
3326  q.y=(double) y-gradient_vector->y1;
3327  length=sqrt(q.x*q.x+q.y*q.y);
3328  gamma=sqrt(p.x*p.x+p.y*p.y)*length;
3329  gamma=PerceptibleReciprocal(gamma);
3330  scale=p.x*q.x+p.y*q.y;
3331  offset=gamma*scale*length;
3332  return(offset);
3333  }
3334  case RadialGradient:
3335  {
3336  PointInfo
3337  v;
3338 
3339  if (gradient->spread == RepeatSpread)
3340  {
3341  v.x=(double) x-gradient->center.x;
3342  v.y=(double) y-gradient->center.y;
3343  return(sqrt(v.x*v.x+v.y*v.y));
3344  }
3345  v.x=(double) (((x-gradient->center.x)*cos(DegreesToRadians(
3346  gradient->angle)))+((y-gradient->center.y)*sin(DegreesToRadians(
3347  gradient->angle))))/gradient->radii.x;
3348  v.y=(double) (((x-gradient->center.x)*sin(DegreesToRadians(
3349  gradient->angle)))-((y-gradient->center.y)*cos(DegreesToRadians(
3350  gradient->angle))))/gradient->radii.y;
3351  return(sqrt(v.x*v.x+v.y*v.y));
3352  }
3353  }
3354  return(0.0);
3355 }
3356 
3357 static int StopInfoCompare(const void *x,const void *y)
3358 {
3359  StopInfo
3360  *stop_1,
3361  *stop_2;
3362 
3363  stop_1=(StopInfo *) x;
3364  stop_2=(StopInfo *) y;
3365  if (stop_1->offset > stop_2->offset)
3366  return(1);
3367  if (fabs(stop_1->offset-stop_2->offset) <= DrawEpsilon)
3368  return(0);
3369  return(-1);
3370 }
3371 
3373  const DrawInfo *draw_info,ExceptionInfo *exception)
3374 {
3375  CacheView
3376  *image_view;
3377 
3378  const GradientInfo
3379  *gradient;
3380 
3381  const SegmentInfo
3382  *gradient_vector;
3383 
3384  double
3385  length;
3386 
3388  status;
3389 
3390  PixelInfo
3391  zero;
3392 
3393  PointInfo
3394  point;
3395 
3397  bounding_box;
3398 
3399  ssize_t
3400  y;
3401 
3402  /*
3403  Draw linear or radial gradient on image.
3404  */
3405  assert(image != (Image *) NULL);
3406  assert(image->signature == MagickCoreSignature);
3407  if (image->debug != MagickFalse)
3408  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3409  assert(draw_info != (const DrawInfo *) NULL);
3410  gradient=(&draw_info->gradient);
3411  qsort(gradient->stops,gradient->number_stops,sizeof(StopInfo),
3412  StopInfoCompare);
3413  gradient_vector=(&gradient->gradient_vector);
3414  point.x=gradient_vector->x2-gradient_vector->x1;
3415  point.y=gradient_vector->y2-gradient_vector->y1;
3416  length=sqrt(point.x*point.x+point.y*point.y);
3417  bounding_box=gradient->bounding_box;
3418  status=MagickTrue;
3419  GetPixelInfo(image,&zero);
3420  image_view=AcquireAuthenticCacheView(image,exception);
3421 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3422  #pragma omp parallel for schedule(static,4) shared(status) \
3423  magick_threads(image,image,1,1)
3424 #endif
3425  for (y=bounding_box.y; y < (ssize_t) bounding_box.height; y++)
3426  {
3427  PixelInfo
3428  composite,
3429  pixel;
3430 
3431  double
3432  alpha,
3433  offset;
3434 
3435  register Quantum
3436  *magick_restrict q;
3437 
3438  register ssize_t
3439  i,
3440  x;
3441 
3442  ssize_t
3443  j;
3444 
3445  if (status == MagickFalse)
3446  continue;
3447  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
3448  if (q == (Quantum *) NULL)
3449  {
3450  status=MagickFalse;
3451  continue;
3452  }
3453  pixel=zero;
3454  composite=zero;
3455  offset=GetStopColorOffset(gradient,0,y);
3456  if (gradient->type != RadialGradient)
3457  offset/=length;
3458  for (x=bounding_box.x; x < (ssize_t) bounding_box.width; x++)
3459  {
3460  GetPixelInfoPixel(image,q,&pixel);
3461  switch (gradient->spread)
3462  {
3463  case UndefinedSpread:
3464  case PadSpread:
3465  {
3466  if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3467  (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3468  {
3469  offset=GetStopColorOffset(gradient,x,y);
3470  if (gradient->type != RadialGradient)
3471  offset/=length;
3472  }
3473  for (i=0; i < (ssize_t) gradient->number_stops; i++)
3474  if (offset < gradient->stops[i].offset)
3475  break;
3476  if ((offset < 0.0) || (i == 0))
3477  composite=gradient->stops[0].color;
3478  else
3479  if ((offset > 1.0) || (i == (ssize_t) gradient->number_stops))
3480  composite=gradient->stops[gradient->number_stops-1].color;
3481  else
3482  {
3483  j=i;
3484  i--;
3485  alpha=(offset-gradient->stops[i].offset)/
3486  (gradient->stops[j].offset-gradient->stops[i].offset);
3487  CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
3488  &gradient->stops[j].color,alpha,&composite);
3489  }
3490  break;
3491  }
3492  case ReflectSpread:
3493  {
3494  if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3495  (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3496  {
3497  offset=GetStopColorOffset(gradient,x,y);
3498  if (gradient->type != RadialGradient)
3499  offset/=length;
3500  }
3501  if (offset < 0.0)
3502  offset=(-offset);
3503  if ((ssize_t) fmod(offset,2.0) == 0)
3504  offset=fmod(offset,1.0);
3505  else
3506  offset=1.0-fmod(offset,1.0);
3507  for (i=0; i < (ssize_t) gradient->number_stops; i++)
3508  if (offset < gradient->stops[i].offset)
3509  break;
3510  if (i == 0)
3511  composite=gradient->stops[0].color;
3512  else
3513  if (i == (ssize_t) gradient->number_stops)
3514  composite=gradient->stops[gradient->number_stops-1].color;
3515  else
3516  {
3517  j=i;
3518  i--;
3519  alpha=(offset-gradient->stops[i].offset)/
3520  (gradient->stops[j].offset-gradient->stops[i].offset);
3521  CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
3522  &gradient->stops[j].color,alpha,&composite);
3523  }
3524  break;
3525  }
3526  case RepeatSpread:
3527  {
3529  antialias;
3530 
3531  double
3532  repeat;
3533 
3534  antialias=MagickFalse;
3535  repeat=0.0;
3536  if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3537  (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3538  {
3539  offset=GetStopColorOffset(gradient,x,y);
3540  if (gradient->type == LinearGradient)
3541  {
3542  repeat=fmod(offset,length);
3543  if (repeat < 0.0)
3544  repeat=length-fmod(-repeat,length);
3545  else
3546  repeat=fmod(offset,length);
3547  antialias=(repeat < length) && ((repeat+1.0) > length) ?
3549  offset=repeat/length;
3550  }
3551  else
3552  {
3553  repeat=fmod(offset,gradient->radius);
3554  if (repeat < 0.0)
3555  repeat=gradient->radius-fmod(-repeat,gradient->radius);
3556  else
3557  repeat=fmod(offset,gradient->radius);
3558  antialias=repeat+1.0 > gradient->radius ? MagickTrue :
3559  MagickFalse;
3560  offset=repeat/gradient->radius;
3561  }
3562  }
3563  for (i=0; i < (ssize_t) gradient->number_stops; i++)
3564  if (offset < gradient->stops[i].offset)
3565  break;
3566  if (i == 0)
3567  composite=gradient->stops[0].color;
3568  else
3569  if (i == (ssize_t) gradient->number_stops)
3570  composite=gradient->stops[gradient->number_stops-1].color;
3571  else
3572  {
3573  j=i;
3574  i--;
3575  alpha=(offset-gradient->stops[i].offset)/
3576  (gradient->stops[j].offset-gradient->stops[i].offset);
3577  if (antialias != MagickFalse)
3578  {
3579  if (gradient->type == LinearGradient)
3580  alpha=length-repeat;
3581  else
3582  alpha=gradient->radius-repeat;
3583  i=0;
3584  j=(ssize_t) gradient->number_stops-1L;
3585  }
3586  CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
3587  &gradient->stops[j].color,alpha,&composite);
3588  }
3589  break;
3590  }
3591  }
3592  CompositePixelInfoOver(&composite,composite.alpha,&pixel,pixel.alpha,
3593  &pixel);
3594  SetPixelViaPixelInfo(image,&pixel,q);
3595  q+=GetPixelChannels(image);
3596  }
3597  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
3598  status=MagickFalse;
3599  }
3600  image_view=DestroyCacheView(image_view);
3601  return(status);
3602 }
3603 
3604 /*
3605 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3606 % %
3607 % %
3608 % %
3609 % D r a w P a t t e r n P a t h %
3610 % %
3611 % %
3612 % %
3613 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3614 %
3615 % DrawPatternPath() draws a pattern.
3616 %
3617 % The format of the DrawPatternPath method is:
3618 %
3619 % MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
3620 % const char *name,Image **pattern,ExceptionInfo *exception)
3621 %
3622 % A description of each parameter follows:
3623 %
3624 % o image: the image.
3625 %
3626 % o draw_info: the draw info.
3627 %
3628 % o name: the pattern name.
3629 %
3630 % o image: the image.
3631 %
3632 % o exception: return any errors or warnings in this structure.
3633 %
3634 */
3636  const DrawInfo *draw_info,const char *name,Image **pattern,
3637  ExceptionInfo *exception)
3638 {
3639  char
3640  property[MagickPathExtent];
3641 
3642  const char
3643  *geometry,
3644  *path,
3645  *type;
3646 
3647  DrawInfo
3648  *clone_info;
3649 
3650  ImageInfo
3651  *image_info;
3652 
3654  status;
3655 
3656  assert(image != (Image *) NULL);
3657  assert(image->signature == MagickCoreSignature);
3658  if (image->debug != MagickFalse)
3659  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3660  assert(draw_info != (const DrawInfo *) NULL);
3661  assert(name != (const char *) NULL);
3662  (void) FormatLocaleString(property,MagickPathExtent,"%s",name);
3663  path=GetImageArtifact(image,property);
3664  if (path == (const char *) NULL)
3665  return(MagickFalse);
3666  (void) FormatLocaleString(property,MagickPathExtent,"%s-geometry",name);
3667  geometry=GetImageArtifact(image,property);
3668  if (geometry == (const char *) NULL)
3669  return(MagickFalse);
3670  if ((*pattern) != (Image *) NULL)
3671  *pattern=DestroyImage(*pattern);
3672  image_info=AcquireImageInfo();
3673  image_info->size=AcquireString(geometry);
3674  *pattern=AcquireImage(image_info,exception);
3675  image_info=DestroyImageInfo(image_info);
3676  (void) QueryColorCompliance("#000000ff",AllCompliance,
3677  &(*pattern)->background_color,exception);
3678  (void) SetImageBackgroundColor(*pattern,exception);
3679  if (image->debug != MagickFalse)
3681  "begin pattern-path %s %s",name,geometry);
3682  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
3683  clone_info->fill_pattern=NewImageList();
3684  clone_info->stroke_pattern=NewImageList();
3685  (void) FormatLocaleString(property,MagickPathExtent,"%s-type",name);
3686  type=GetImageArtifact(image,property);
3687  if (type != (const char *) NULL)
3690  (void) CloneString(&clone_info->primitive,path);
3691  status=DrawImage(*pattern,clone_info,exception);
3692  clone_info=DestroyDrawInfo(clone_info);
3693  if (image->debug != MagickFalse)
3694  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end pattern-path");
3695  return(status);
3696 }
3697 
3698 /*
3699 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3700 % %
3701 % %
3702 % %
3703 + D r a w P o l y g o n P r i m i t i v e %
3704 % %
3705 % %
3706 % %
3707 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3708 %
3709 % DrawPolygonPrimitive() draws a polygon on the image.
3710 %
3711 % The format of the DrawPolygonPrimitive method is:
3712 %
3713 % MagickBooleanType DrawPolygonPrimitive(Image *image,
3714 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
3715 % ExceptionInfo *exception)
3716 %
3717 % A description of each parameter follows:
3718 %
3719 % o image: the image.
3720 %
3721 % o draw_info: the draw info.
3722 %
3723 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
3724 %
3725 % o exception: return any errors or warnings in this structure.
3726 %
3727 */
3728 
3730 {
3731  register ssize_t
3732  i;
3733 
3734  assert(polygon_info != (PolygonInfo **) NULL);
3735  for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
3736  if (polygon_info[i] != (PolygonInfo *) NULL)
3737  polygon_info[i]=DestroyPolygonInfo(polygon_info[i]);
3738  polygon_info=(PolygonInfo **) RelinquishMagickMemory(polygon_info);
3739  return(polygon_info);
3740 }
3741 
3743  const PrimitiveInfo *primitive_info)
3744 {
3745  PathInfo
3746  *magick_restrict path_info;
3747 
3748  PolygonInfo
3749  **polygon_info;
3750 
3751  register ssize_t
3752  i;
3753 
3754  size_t
3755  number_threads;
3756 
3757  number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
3758  polygon_info=(PolygonInfo **) AcquireQuantumMemory(number_threads,
3759  sizeof(*polygon_info));
3760  if (polygon_info == (PolygonInfo **) NULL)
3761  return((PolygonInfo **) NULL);
3762  (void) ResetMagickMemory(polygon_info,0,number_threads*sizeof(*polygon_info));
3763  path_info=ConvertPrimitiveToPath(primitive_info);
3764  if (path_info == (PathInfo *) NULL)
3765  return(DestroyPolygonThreadSet(polygon_info));
3766  for (i=0; i < (ssize_t) number_threads; i++)
3767  {
3768  polygon_info[i]=ConvertPathToPolygon(path_info);
3769  if (polygon_info[i] == (PolygonInfo *) NULL)
3770  return(DestroyPolygonThreadSet(polygon_info));
3771  }
3772  path_info=(PathInfo *) RelinquishMagickMemory(path_info);
3773  return(polygon_info);
3774 }
3775 
3776 static double GetFillAlpha(PolygonInfo *polygon_info,const double mid,
3777  const MagickBooleanType fill,const FillRule fill_rule,const ssize_t x,
3778  const ssize_t y,double *stroke_alpha)
3779 {
3780  double
3781  alpha,
3782  beta,
3783  distance,
3784  subpath_alpha;
3785 
3786  PointInfo
3787  delta;
3788 
3789  register const PointInfo
3790  *q;
3791 
3792  register EdgeInfo
3793  *p;
3794 
3795  register ssize_t
3796  i;
3797 
3798  ssize_t
3799  j,
3800  winding_number;
3801 
3802  /*
3803  Compute fill & stroke opacity for this (x,y) point.
3804  */
3805  *stroke_alpha=0.0;
3806  subpath_alpha=0.0;
3807  p=polygon_info->edges;
3808  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
3809  {
3810  if ((double) y <= (p->bounds.y1-mid-0.5))
3811  break;
3812  if ((double) y > (p->bounds.y2+mid+0.5))
3813  {
3814  (void) DestroyEdge(polygon_info,(size_t) j);
3815  continue;
3816  }
3817  if (((double) x <= (p->bounds.x1-mid-0.5)) ||
3818  ((double) x > (p->bounds.x2+mid+0.5)))
3819  continue;
3820  i=(ssize_t) MagickMax((double) p->highwater,1.0);
3821  for ( ; i < (ssize_t) p->number_points; i++)
3822  {
3823  if ((double) y <= (p->points[i-1].y-mid-0.5))
3824  break;
3825  if ((double) y > (p->points[i].y+mid+0.5))
3826  continue;
3827  if (p->scanline != (double) y)
3828  {
3829  p->scanline=(double) y;
3830  p->highwater=(size_t) i;
3831  }
3832  /*
3833  Compute distance between a point and an edge.
3834  */
3835  q=p->points+i-1;
3836  delta.x=(q+1)->x-q->x;
3837  delta.y=(q+1)->y-q->y;
3838  beta=delta.x*(x-q->x)+delta.y*(y-q->y);
3839  if (beta < 0.0)
3840  {
3841  delta.x=(double) x-q->x;
3842  delta.y=(double) y-q->y;
3843  distance=delta.x*delta.x+delta.y*delta.y;
3844  }
3845  else
3846  {
3847  alpha=delta.x*delta.x+delta.y*delta.y;
3848  if (beta > alpha)
3849  {
3850  delta.x=(double) x-(q+1)->x;
3851  delta.y=(double) y-(q+1)->y;
3852  distance=delta.x*delta.x+delta.y*delta.y;
3853  }
3854  else
3855  {
3856  alpha=1.0/alpha;
3857  beta=delta.x*(y-q->y)-delta.y*(x-q->x);
3858  distance=alpha*beta*beta;
3859  }
3860  }
3861  /*
3862  Compute stroke & subpath opacity.
3863  */
3864  beta=0.0;
3865  if (p->ghostline == MagickFalse)
3866  {
3867  alpha=mid+0.5;
3868  if ((*stroke_alpha < 1.0) &&
3869  (distance <= ((alpha+0.25)*(alpha+0.25))))
3870  {
3871  alpha=mid-0.5;
3872  if (distance <= ((alpha+0.25)*(alpha+0.25)))
3873  *stroke_alpha=1.0;
3874  else
3875  {
3876  beta=1.0;
3877  if (fabs(distance-1.0) >= DrawEpsilon)
3878  beta=sqrt((double) distance);
3879  alpha=beta-mid-0.5;
3880  if (*stroke_alpha < ((alpha-0.25)*(alpha-0.25)))
3881  *stroke_alpha=(alpha-0.25)*(alpha-0.25);
3882  }
3883  }
3884  }
3885  if ((fill == MagickFalse) || (distance > 1.0) || (subpath_alpha >= 1.0))
3886  continue;
3887  if (distance <= 0.0)
3888  {
3889  subpath_alpha=1.0;
3890  continue;
3891  }
3892  if (distance > 1.0)
3893  continue;
3894  if (fabs(beta) < DrawEpsilon)
3895  {
3896  beta=1.0;
3897  if (fabs(distance-1.0) >= DrawEpsilon)
3898  beta=sqrt(distance);
3899  }
3900  alpha=beta-1.0;
3901  if (subpath_alpha < (alpha*alpha))
3902  subpath_alpha=alpha*alpha;
3903  }
3904  }
3905  /*
3906  Compute fill opacity.
3907  */
3908  if (fill == MagickFalse)
3909  return(0.0);
3910  if (subpath_alpha >= 1.0)
3911  return(1.0);
3912  /*
3913  Determine winding number.
3914  */
3915  winding_number=0;
3916  p=polygon_info->edges;
3917  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
3918  {
3919  if ((double) y <= p->bounds.y1)
3920  break;
3921  if (((double) y > p->bounds.y2) || ((double) x <= p->bounds.x1))
3922  continue;
3923  if ((double) x > p->bounds.x2)
3924  {
3925  winding_number+=p->direction ? 1 : -1;
3926  continue;
3927  }
3928  i=(ssize_t) MagickMax((double) p->highwater,1.0);
3929  for ( ; i < (ssize_t) p->number_points; i++)
3930  if ((double) y <= p->points[i].y)
3931  break;
3932  q=p->points+i-1;
3933  if ((((q+1)->x-q->x)*(y-q->y)) <= (((q+1)->y-q->y)*(x-q->x)))
3934  winding_number+=p->direction ? 1 : -1;
3935  }
3936  if (fill_rule != NonZeroRule)
3937  {
3938  if ((MagickAbsoluteValue(winding_number) & 0x01) != 0)
3939  return(1.0);
3940  }
3941  else
3942  if (MagickAbsoluteValue(winding_number) != 0)
3943  return(1.0);
3944  return(subpath_alpha);
3945 }
3946 
3948  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
3949  ExceptionInfo *exception)
3950 {
3951  CacheView
3952  *image_view;
3953 
3955  fill,
3956  status;
3957 
3958  double
3959  mid;
3960 
3961  PolygonInfo
3962  **magick_restrict polygon_info;
3963 
3964  register EdgeInfo
3965  *p;
3966 
3967  register ssize_t
3968  i;
3969 
3970  SegmentInfo
3971  bounds;
3972 
3973  ssize_t
3974  start_y,
3975  stop_y,
3976  y;
3977 
3978  /*
3979  Compute bounding box.
3980  */
3981  assert(image != (Image *) NULL);
3982  assert(image->signature == MagickCoreSignature);
3983  if (image->debug != MagickFalse)
3984  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3985  assert(draw_info != (DrawInfo *) NULL);
3986  assert(draw_info->signature == MagickCoreSignature);
3987  assert(primitive_info != (PrimitiveInfo *) NULL);
3988  if (primitive_info->coordinates == 0)
3989  return(MagickTrue);
3990  polygon_info=AcquirePolygonThreadSet(primitive_info);
3991  if (polygon_info == (PolygonInfo **) NULL)
3992  return(MagickFalse);
3993 DisableMSCWarning(4127)
3994  if (0)
3995  DrawBoundingRectangles(image,draw_info,polygon_info[0],exception);
3997  if (image->debug != MagickFalse)
3998  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-polygon");
3999  fill=(primitive_info->method == FillToBorderMethod) ||
4000  (primitive_info->method == FloodfillMethod) ? MagickTrue : MagickFalse;
4001  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
4002  bounds=polygon_info[0]->edges[0].bounds;
4003  for (i=1; i < (ssize_t) polygon_info[0]->number_edges; i++)
4004  {
4005  p=polygon_info[0]->edges+i;
4006  if (p->bounds.x1 < bounds.x1)
4007  bounds.x1=p->bounds.x1;
4008  if (p->bounds.y1 < bounds.y1)
4009  bounds.y1=p->bounds.y1;
4010  if (p->bounds.x2 > bounds.x2)
4011  bounds.x2=p->bounds.x2;
4012  if (p->bounds.y2 > bounds.y2)
4013  bounds.y2=p->bounds.y2;
4014  }
4015  bounds.x1-=(mid+1.0);
4016  bounds.x1=bounds.x1 < 0.0 ? 0.0 : (size_t) ceil(bounds.x1-0.5) >=
4017  image->columns ? (double) image->columns-1 : bounds.x1;
4018  bounds.y1-=(mid+1.0);
4019  bounds.y1=bounds.y1 < 0.0 ? 0.0 : (size_t) ceil(bounds.y1-0.5) >=
4020  image->rows ? (double) image->rows-1 : bounds.y1;
4021  bounds.x2+=(mid+1.0);
4022  bounds.x2=bounds.x2 < 0.0 ? 0.0 : (size_t) floor(bounds.x2+0.5) >=
4023  image->columns ? (double) image->columns-1 : bounds.x2;
4024  bounds.y2+=(mid+1.0);
4025  bounds.y2=bounds.y2 < 0.0 ? 0.0 : (size_t) floor(bounds.y2+0.5) >=
4026  image->rows ? (double) image->rows-1 : bounds.y2;
4027  status=MagickTrue;
4028  image_view=AcquireAuthenticCacheView(image,exception);
4029  if ((primitive_info->coordinates == 1) ||
4030  (polygon_info[0]->number_edges == 0))
4031  {
4032  /*
4033  Draw point.
4034  */
4035  start_y=(ssize_t) ceil(bounds.y1-0.5);
4036  stop_y=(ssize_t) floor(bounds.y2+0.5);
4037 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4038  #pragma omp parallel for schedule(static,4) shared(status) \
4039  magick_threads(image,image,1,1)
4040 #endif
4041  for (y=start_y; y <= stop_y; y++)
4042  {
4044  sync;
4045 
4046  PixelInfo
4047  pixel;
4048 
4049  register ssize_t
4050  x;
4051 
4052  register Quantum
4053  *magick_restrict q;
4054 
4055  ssize_t
4056  start_x,
4057  stop_x;
4058 
4059  if (status == MagickFalse)
4060  continue;
4061  start_x=(ssize_t) ceil(bounds.x1-0.5);
4062  stop_x=(ssize_t) floor(bounds.x2+0.5);
4063  x=start_x;
4064  q=GetCacheViewAuthenticPixels(image_view,x,y,(size_t) (stop_x-x+1),1,
4065  exception);
4066  if (q == (Quantum *) NULL)
4067  {
4068  status=MagickFalse;
4069  continue;
4070  }
4071  GetPixelInfo(image,&pixel);
4072  for ( ; x <= stop_x; x++)
4073  {
4074  if ((x == (ssize_t) ceil(primitive_info->point.x-0.5)) &&
4075  (y == (ssize_t) ceil(primitive_info->point.y-0.5)))
4076  {
4077  GetFillColor(draw_info,x-start_x,y-start_y,&pixel,exception);
4078  SetPixelViaPixelInfo(image,&pixel,q);
4079  }
4080  q+=GetPixelChannels(image);
4081  }
4082  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4083  if (sync == MagickFalse)
4084  status=MagickFalse;
4085  }
4086  image_view=DestroyCacheView(image_view);
4087  polygon_info=DestroyPolygonThreadSet(polygon_info);
4088  if (image->debug != MagickFalse)
4090  " end draw-polygon");
4091  return(status);
4092  }
4093  /*
4094  Draw polygon or line.
4095  */
4096  if (image->alpha_trait == UndefinedPixelTrait)
4097  (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
4098  start_y=(ssize_t) ceil(bounds.y1-0.5);
4099  stop_y=(ssize_t) floor(bounds.y2+0.5);
4100 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4101  #pragma omp parallel for schedule(static,4) shared(status) \
4102  magick_threads(image,image,1,1)
4103 #endif
4104  for (y=start_y; y <= stop_y; y++)
4105  {
4106  const int
4107  id = GetOpenMPThreadId();
4108 
4109  double
4110  fill_alpha,
4111  stroke_alpha;
4112 
4113  PixelInfo
4114  fill_color,
4115  stroke_color;
4116 
4117  register Quantum
4118  *magick_restrict q;
4119 
4120  register ssize_t
4121  x;
4122 
4123  ssize_t
4124  start_x,
4125  stop_x;
4126 
4127  if (status == MagickFalse)
4128  continue;
4129  start_x=(ssize_t) ceil(bounds.x1-0.5);
4130  stop_x=(ssize_t) floor(bounds.x2+0.5);
4131  q=GetCacheViewAuthenticPixels(image_view,start_x,y,(size_t) (stop_x-start_x+ 1),1,exception);
4132  if (q == (Quantum *) NULL)
4133  {
4134  status=MagickFalse;
4135  continue;
4136  }
4137  for (x=start_x; x <= stop_x; x++)
4138  {
4139  /*
4140  Fill and/or stroke.
4141  */
4142  fill_alpha=GetFillAlpha(polygon_info[id],mid,fill,draw_info->fill_rule,
4143  x,y,&stroke_alpha);
4144  if (draw_info->stroke_antialias == MagickFalse)
4145  {
4146  fill_alpha=fill_alpha > 0.25 ? 1.0 : 0.0;
4147  stroke_alpha=stroke_alpha > 0.25 ? 1.0 : 0.0;
4148  }
4149  GetFillColor(draw_info,x-start_x,y-start_y,&fill_color,exception);
4150  fill_alpha=fill_alpha*fill_color.alpha;
4151  CompositePixelOver(image,&fill_color,fill_alpha,q,(double)
4152  GetPixelAlpha(image,q),q);
4153  GetStrokeColor(draw_info,x-start_x,y-start_y,&stroke_color,exception);
4154  stroke_alpha=stroke_alpha*stroke_color.alpha;
4155  CompositePixelOver(image,&stroke_color,stroke_alpha,q,(double)
4156  GetPixelAlpha(image,q),q);
4157  q+=GetPixelChannels(image);
4158  }
4159  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
4160  status=MagickFalse;
4161  }
4162  image_view=DestroyCacheView(image_view);
4163  polygon_info=DestroyPolygonThreadSet(polygon_info);
4164  if (image->debug != MagickFalse)
4165  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-polygon");
4166  return(status);
4167 }
4168 
4169 /*
4170 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4171 % %
4172 % %
4173 % %
4174 % D r a w P r i m i t i v e %
4175 % %
4176 % %
4177 % %
4178 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4179 %
4180 % DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.
4181 %
4182 % The format of the DrawPrimitive method is:
4183 %
4184 % MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
4185 % PrimitiveInfo *primitive_info,ExceptionInfo *exception)
4186 %
4187 % A description of each parameter follows:
4188 %
4189 % o image: the image.
4190 %
4191 % o draw_info: the draw info.
4192 %
4193 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4194 %
4195 % o exception: return any errors or warnings in this structure.
4196 %
4197 */
4198 
4199 static void LogPrimitiveInfo(const PrimitiveInfo *primitive_info)
4200 {
4201  const char
4202  *methods[] =
4203  {
4204  "point",
4205  "replace",
4206  "floodfill",
4207  "filltoborder",
4208  "reset",
4209  "?"
4210  };
4211 
4212  PointInfo
4213  p,
4214  q,
4215  point;
4216 
4217  register ssize_t
4218  i,
4219  x;
4220 
4221  ssize_t
4222  coordinates,
4223  y;
4224 
4225  x=(ssize_t) ceil(primitive_info->point.x-0.5);
4226  y=(ssize_t) ceil(primitive_info->point.y-0.5);
4227  switch (primitive_info->primitive)
4228  {
4229  case AlphaPrimitive:
4230  {
4232  "AlphaPrimitive %.20g,%.20g %s",(double) x,(double) y,
4233  methods[primitive_info->method]);
4234  return;
4235  }
4236  case ColorPrimitive:
4237  {
4239  "ColorPrimitive %.20g,%.20g %s",(double) x,(double) y,
4240  methods[primitive_info->method]);
4241  return;
4242  }
4243  case ImagePrimitive:
4244  {
4246  "ImagePrimitive %.20g,%.20g",(double) x,(double) y);
4247  return;
4248  }
4249  case PointPrimitive:
4250  {
4252  "PointPrimitive %.20g,%.20g %s",(double) x,(double) y,
4253  methods[primitive_info->method]);
4254  return;
4255  }
4256  case TextPrimitive:
4257  {
4259  "TextPrimitive %.20g,%.20g",(double) x,(double) y);
4260  return;
4261  }
4262  default:
4263  break;
4264  }
4265  coordinates=0;
4266  p=primitive_info[0].point;
4267  q.x=(-1.0);
4268  q.y=(-1.0);
4269  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4270  {
4271  point=primitive_info[i].point;
4272  if (coordinates <= 0)
4273  {
4274  coordinates=(ssize_t) primitive_info[i].coordinates;
4276  " begin open (%.20g)",(double) coordinates);
4277  p=point;
4278  }
4279  point=primitive_info[i].point;
4280  if ((fabs(q.x-point.x) >= DrawEpsilon) ||
4281  (fabs(q.y-point.y) >= DrawEpsilon))
4283  " %.20g: %.18g,%.18g",(double) coordinates,point.x,point.y);
4284  else
4286  " %.20g: %g %g (duplicate)",(double) coordinates,point.x,point.y);
4287  q=point;
4288  coordinates--;
4289  if (coordinates > 0)
4290  continue;
4291  if ((fabs(p.x-point.x) >= DrawEpsilon) ||
4292  (fabs(p.y-point.y) >= DrawEpsilon))
4293  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end last (%.20g)",
4294  (double) coordinates);
4295  else
4296  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end open (%.20g)",
4297  (double) coordinates);
4298  }
4299 }
4300 
4302  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
4303  ExceptionInfo *exception)
4304 {
4305  CacheView
4306  *image_view;
4307 
4309  status;
4310 
4311  register ssize_t
4312  i,
4313  x;
4314 
4315  ssize_t
4316  y;
4317 
4318  if (image->debug != MagickFalse)
4319  {
4321  " begin draw-primitive");
4323  " affine: %g,%g,%g,%g,%g,%g",draw_info->affine.sx,
4324  draw_info->affine.rx,draw_info->affine.ry,draw_info->affine.sy,
4325  draw_info->affine.tx,draw_info->affine.ty);
4326  }
4327  if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
4328  ((IsPixelInfoGray(&draw_info->fill) == MagickFalse) ||
4329  (IsPixelInfoGray(&draw_info->stroke) == MagickFalse)))
4330  (void) SetImageColorspace(image,sRGBColorspace,exception);
4331  status=MagickTrue;
4332  x=(ssize_t) ceil(primitive_info->point.x-0.5);
4333  y=(ssize_t) ceil(primitive_info->point.y-0.5);
4334  image_view=AcquireAuthenticCacheView(image,exception);
4335  switch (primitive_info->primitive)
4336  {
4337  case AlphaPrimitive:
4338  {
4339  if (image->alpha_trait == UndefinedPixelTrait)
4340  (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
4341  switch (primitive_info->method)
4342  {
4343  case PointMethod:
4344  default:
4345  {
4346  PixelInfo
4347  pixel;
4348 
4349  register Quantum
4350  *q;
4351 
4352  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4353  if (q == (Quantum *) NULL)
4354  break;
4355  GetFillColor(draw_info,x,y,&pixel,exception);
4356  SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
4357  (void) SyncCacheViewAuthenticPixels(image_view,exception);
4358  break;
4359  }
4360  case ReplaceMethod:
4361  {
4363  sync;
4364 
4365  PixelInfo
4366  pixel,
4367  target;
4368 
4369  (void) GetOneCacheViewVirtualPixelInfo(image_view,x,y,&target,
4370  exception);
4371  GetPixelInfo(image,&pixel);
4372  for (y=0; y < (ssize_t) image->rows; y++)
4373  {
4374  register Quantum
4375  *magick_restrict q;
4376 
4377  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4378  exception);
4379  if (q == (Quantum *) NULL)
4380  break;
4381  for (x=0; x < (ssize_t) image->columns; x++)
4382  {
4383  GetPixelInfoPixel(image,q,&pixel);
4384  if (IsFuzzyEquivalencePixelInfo(&pixel,&target) == MagickFalse)
4385  {
4386  q+=GetPixelChannels(image);
4387  continue;
4388  }
4389  GetFillColor(draw_info,x,y,&pixel,exception);
4390  SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
4391  q+=GetPixelChannels(image);
4392  }
4393  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4394  if (sync == MagickFalse)
4395  break;
4396  }
4397  break;
4398  }
4399  case FloodfillMethod:
4400  case FillToBorderMethod:
4401  {
4402  ChannelType
4403  channel_mask;
4404 
4405  PixelInfo
4406  target;
4407 
4409  &target,exception);
4410  if (primitive_info->method == FillToBorderMethod)
4411  {
4412  target.red=(double) draw_info->border_color.red;
4413  target.green=(double) draw_info->border_color.green;
4414  target.blue=(double) draw_info->border_color.blue;
4415  }
4416  channel_mask=SetImageChannelMask(image,AlphaChannel);
4417  status&=FloodfillPaintImage(image,draw_info,&target,x,y,
4418  primitive_info->method == FloodfillMethod ? MagickFalse :
4419  MagickTrue,exception);
4420  (void) SetImageChannelMask(image,channel_mask);
4421  break;
4422  }
4423  case ResetMethod:
4424  {
4426  sync;
4427 
4428  PixelInfo
4429  pixel;
4430 
4431  for (y=0; y < (ssize_t) image->rows; y++)
4432  {
4433  register Quantum
4434  *magick_restrict q;
4435 
4436  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4437  exception);
4438  if (q == (Quantum *) NULL)
4439  break;
4440  for (x=0; x < (ssize_t) image->columns; x++)
4441  {
4442  GetFillColor(draw_info,x,y,&pixel,exception);
4443  SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
4444  q+=GetPixelChannels(image);
4445  }
4446  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4447  if (sync == MagickFalse)
4448  break;
4449  }
4450  break;
4451  }
4452  }
4453  break;
4454  }
4455  case ColorPrimitive:
4456  {
4457  switch (primitive_info->method)
4458  {
4459  case PointMethod:
4460  default:
4461  {
4462  PixelInfo
4463  pixel;
4464 
4465  register Quantum
4466  *q;
4467 
4468  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4469  if (q == (Quantum *) NULL)
4470  break;
4471  GetPixelInfo(image,&pixel);
4472  GetFillColor(draw_info,x,y,&pixel,exception);
4473  SetPixelViaPixelInfo(image,&pixel,q);
4474  (void) SyncCacheViewAuthenticPixels(image_view,exception);
4475  break;
4476  }
4477  case ReplaceMethod:
4478  {
4480  sync;
4481 
4482  PixelInfo
4483  pixel,
4484  target;
4485 
4486  (void) GetOneCacheViewVirtualPixelInfo(image_view,x,y,&target,
4487  exception);
4488  for (y=0; y < (ssize_t) image->rows; y++)
4489  {
4490  register Quantum
4491  *magick_restrict q;
4492 
4493  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4494  exception);
4495  if (q == (Quantum *) NULL)
4496  break;
4497  for (x=0; x < (ssize_t) image->columns; x++)
4498  {
4499  GetPixelInfoPixel(image,q,&pixel);
4500  if (IsFuzzyEquivalencePixelInfo(&pixel,&target) == MagickFalse)
4501  {
4502  q+=GetPixelChannels(image);
4503  continue;
4504  }
4505  GetFillColor(draw_info,x,y,&pixel,exception);
4506  SetPixelViaPixelInfo(image,&pixel,q);
4507  q+=GetPixelChannels(image);
4508  }
4509  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4510  if (sync == MagickFalse)
4511  break;
4512  }
4513  break;
4514  }
4515  case FloodfillMethod:
4516  case FillToBorderMethod:
4517  {
4518  PixelInfo
4519  target;
4520 
4522  &target,exception);
4523  if (primitive_info->method == FillToBorderMethod)
4524  {
4525  target.red=(double) draw_info->border_color.red;
4526  target.green=(double) draw_info->border_color.green;
4527  target.blue=(double) draw_info->border_color.blue;
4528  }
4529  status&=FloodfillPaintImage(image,draw_info,&target,x,y,
4530  primitive_info->method == FloodfillMethod ? MagickFalse :
4531  MagickTrue,exception);
4532  break;
4533  }
4534  case ResetMethod:
4535  {
4537  sync;
4538 
4539  PixelInfo
4540  pixel;
4541 
4542  GetPixelInfo(image,&pixel);
4543  for (y=0; y < (ssize_t) image->rows; y++)
4544  {
4545  register Quantum
4546  *magick_restrict q;
4547 
4548  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4549  exception);
4550  if (q == (Quantum *) NULL)
4551  break;
4552  for (x=0; x < (ssize_t) image->columns; x++)
4553  {
4554  GetFillColor(draw_info,x,y,&pixel,exception);
4555  SetPixelViaPixelInfo(image,&pixel,q);
4556  q+=GetPixelChannels(image);
4557  }
4558  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4559  if (sync == MagickFalse)
4560  break;
4561  }
4562  break;
4563  }
4564  }
4565  break;
4566  }
4567  case ImagePrimitive:
4568  {
4569  AffineMatrix
4570  affine;
4571 
4572  char
4573  composite_geometry[MagickPathExtent];
4574 
4575  Image
4576  *composite_image;
4577 
4578  ImageInfo
4579  *clone_info;
4580 
4582  geometry;
4583 
4584  ssize_t
4585  x1,
4586  y1;
4587 
4588  if (primitive_info->text == (char *) NULL)
4589  break;
4590  clone_info=AcquireImageInfo();
4591  if (LocaleNCompare(primitive_info->text,"data:",5) == 0)
4592  composite_image=ReadInlineImage(clone_info,primitive_info->text,
4593  exception);
4594  else
4595  {
4596  (void) CopyMagickString(clone_info->filename,primitive_info->text,
4598  composite_image=ReadImage(clone_info,exception);
4599  }
4600  clone_info=DestroyImageInfo(clone_info);
4601  if (composite_image == (Image *) NULL)
4602  break;
4603  (void) SetImageProgressMonitor(composite_image,(MagickProgressMonitor)
4604  NULL,(void *) NULL);
4605  x1=(ssize_t) ceil(primitive_info[1].point.x-0.5);
4606  y1=(ssize_t) ceil(primitive_info[1].point.y-0.5);
4607  if (((x1 != 0L) && (x1 != (ssize_t) composite_image->columns)) ||
4608  ((y1 != 0L) && (y1 != (ssize_t) composite_image->rows)))
4609  {
4610  /*
4611  Resize image.
4612  */
4613  (void) FormatLocaleString(composite_geometry,MagickPathExtent,
4614  "%gx%g!",primitive_info[1].point.x,primitive_info[1].point.y);
4615  composite_image->filter=image->filter;
4616  (void) TransformImage(&composite_image,(char *) NULL,
4617  composite_geometry,exception);
4618  }
4619  if (composite_image->alpha_trait == UndefinedPixelTrait)
4620  (void) SetImageAlphaChannel(composite_image,OpaqueAlphaChannel,
4621  exception);
4622  if (draw_info->alpha != OpaqueAlpha)
4623  (void) SetImageAlpha(composite_image,draw_info->alpha,exception);
4624  SetGeometry(image,&geometry);
4625  image->gravity=draw_info->gravity;
4626  geometry.x=x;
4627  geometry.y=y;
4628  (void) FormatLocaleString(composite_geometry,MagickPathExtent,
4629  "%.20gx%.20g%+.20g%+.20g",(double) composite_image->columns,(double)
4630  composite_image->rows,(double) geometry.x,(double) geometry.y);
4631  (void) ParseGravityGeometry(image,composite_geometry,&geometry,exception);
4632  affine=draw_info->affine;
4633  affine.tx=(double) geometry.x;
4634  affine.ty=(double) geometry.y;
4635  composite_image->interpolate=image->interpolate;
4636  if (draw_info->compose == OverCompositeOp)
4637  (void) DrawAffineImage(image,composite_image,&affine,exception);
4638  else
4639  (void) CompositeImage(image,composite_image,draw_info->compose,
4640  MagickTrue,geometry.x,geometry.y,exception);
4641  composite_image=DestroyImage(composite_image);
4642  break;
4643  }
4644  case PointPrimitive:
4645  {
4646  PixelInfo
4647  fill_color;
4648 
4649  register Quantum
4650  *q;
4651 
4652  if ((y < 0) || (y >= (ssize_t) image->rows))
4653  break;
4654  if ((x < 0) || (x >= (ssize_t) image->columns))
4655  break;
4656  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4657  if (q == (Quantum *) NULL)
4658  break;
4659  GetFillColor(draw_info,x,y,&fill_color,exception);
4660  CompositePixelOver(image,&fill_color,(double) fill_color.alpha,q,
4661  (double) GetPixelAlpha(image,q),q);
4662  (void) SyncCacheViewAuthenticPixels(image_view,exception);
4663  break;
4664  }
4665  case TextPrimitive:
4666  {
4667  char
4668  geometry[MagickPathExtent];
4669 
4670  DrawInfo
4671  *clone_info;
4672 
4673  if (primitive_info->text == (char *) NULL)
4674  break;
4675  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4676  (void) CloneString(&clone_info->text,primitive_info->text);
4677  (void) FormatLocaleString(geometry,MagickPathExtent,"%+f%+f",
4678  primitive_info->point.x,primitive_info->point.y);
4679  (void) CloneString(&clone_info->geometry,geometry);
4680  status&=AnnotateImage(image,clone_info,exception);
4681  clone_info=DestroyDrawInfo(clone_info);
4682  break;
4683  }
4684  default:
4685  {
4686  double
4687  mid,
4688  scale;
4689 
4690  DrawInfo
4691  *clone_info;
4692 
4693  if (IsEventLogging() != MagickFalse)
4694  LogPrimitiveInfo(primitive_info);
4695  scale=ExpandAffine(&draw_info->affine);
4696  if ((draw_info->dash_pattern != (double *) NULL) &&
4697  (fabs(draw_info->dash_pattern[0]) >= DrawEpsilon) &&
4698  (fabs(scale*draw_info->stroke_width) >= DrawEpsilon) &&
4699  (draw_info->stroke.alpha != (Quantum) TransparentAlpha))
4700  {
4701  /*
4702  Draw dash polygon.
4703  */
4704  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4705  clone_info->stroke_width=0.0;
4706  clone_info->stroke.alpha=(MagickRealType) TransparentAlpha;
4707  status&=DrawPolygonPrimitive(image,clone_info,primitive_info,
4708  exception);
4709  clone_info=DestroyDrawInfo(clone_info);
4710  (void) DrawDashPolygon(draw_info,primitive_info,image,exception);
4711  break;
4712  }
4713  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
4714  if ((mid > 1.0) &&
4715  ((draw_info->stroke.alpha != (Quantum) TransparentAlpha) ||
4716  (draw_info->stroke_pattern != (Image *) NULL)))
4717  {
4719  closed_path;
4720 
4721  /*
4722  Draw strokes while respecting line cap/join attributes.
4723  */
4724  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
4725  closed_path=
4726  (fabs(primitive_info[i-1].point.x-primitive_info[0].point.x) < DrawEpsilon) &&
4727  (fabs(primitive_info[i-1].point.y-primitive_info[0].point.y) < DrawEpsilon) ?
4729  i=(ssize_t) primitive_info[0].coordinates;
4730  if (((closed_path != MagickFalse) &&
4731  (draw_info->linejoin == RoundJoin)) ||
4732  (primitive_info[i].primitive != UndefinedPrimitive))
4733  {
4734  (void) DrawPolygonPrimitive(image,draw_info,primitive_info,
4735  exception);
4736  break;
4737  }
4738  if (draw_info->linecap == RoundCap)
4739  {
4740  (void) DrawPolygonPrimitive(image,draw_info,primitive_info,
4741  exception);
4742  break;
4743  }
4744  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4745  clone_info->stroke_width=0.0;
4746  clone_info->stroke.alpha=(MagickRealType) TransparentAlpha;
4747  status&=DrawPolygonPrimitive(image,clone_info,primitive_info,
4748  exception);
4749  clone_info=DestroyDrawInfo(clone_info);
4750  status&=DrawStrokePolygon(image,draw_info,primitive_info,exception);
4751  break;
4752  }
4753  status&=DrawPolygonPrimitive(image,draw_info,primitive_info,exception);
4754  break;
4755  }
4756  }
4757  image_view=DestroyCacheView(image_view);
4758  if (image->debug != MagickFalse)
4759  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-primitive");
4760  return(status != 0 ? MagickTrue : MagickFalse);
4761 }
4762 
4763 /*
4764 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4765 % %
4766 % %
4767 % %
4768 + D r a w S t r o k e P o l y g o n %
4769 % %
4770 % %
4771 % %
4772 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4773 %
4774 % DrawStrokePolygon() draws a stroked polygon (line, rectangle, ellipse) on
4775 % the image while respecting the line cap and join attributes.
4776 %
4777 % The format of the DrawStrokePolygon method is:
4778 %
4779 % MagickBooleanType DrawStrokePolygon(Image *image,
4780 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4781 %
4782 % A description of each parameter follows:
4783 %
4784 % o image: the image.
4785 %
4786 % o draw_info: the draw info.
4787 %
4788 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4789 %
4790 %
4791 */
4792 
4793 static void DrawRoundLinecap(Image *image,const DrawInfo *draw_info,
4794  const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
4795 {
4797  linecap[5];
4798 
4799  register ssize_t
4800  i;
4801 
4802  for (i=0; i < 4; i++)
4803  linecap[i]=(*primitive_info);
4804  linecap[0].coordinates=4;
4805  linecap[1].point.x+=2.0*DrawEpsilon;
4806  linecap[2].point.x+=2.0*DrawEpsilon;
4807  linecap[2].point.y+=2.0*DrawEpsilon;
4808  linecap[3].point.y+=2.0*DrawEpsilon;
4809  linecap[4].primitive=UndefinedPrimitive;
4810  (void) DrawPolygonPrimitive(image,draw_info,linecap,exception);
4811 }
4812 
4814  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
4815  ExceptionInfo *exception)
4816 {
4817  DrawInfo
4818  *clone_info;
4819 
4821  closed_path;
4822 
4824  status;
4825 
4827  *stroke_polygon;
4828 
4829  register const PrimitiveInfo
4830  *p,
4831  *q;
4832 
4833  /*
4834  Draw stroked polygon.
4835  */
4836  if (image->debug != MagickFalse)
4838  " begin draw-stroke-polygon");
4839  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4840  clone_info->fill=draw_info->stroke;
4841  if (clone_info->fill_pattern != (Image *) NULL)
4842  clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
4843  if (clone_info->stroke_pattern != (Image *) NULL)
4844  clone_info->fill_pattern=CloneImage(clone_info->stroke_pattern,0,0,
4845  MagickTrue,exception);
4847  clone_info->stroke_width=0.0;
4848  clone_info->fill_rule=NonZeroRule;
4849  status=MagickTrue;
4850  for (p=primitive_info; p->primitive != UndefinedPrimitive; p+=p->coordinates)
4851  {
4852  stroke_polygon=TraceStrokePolygon(draw_info,p);
4853  status&=DrawPolygonPrimitive(image,clone_info,stroke_polygon,exception);
4854  if (status == 0)
4855  break;
4856  stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
4857  q=p+p->coordinates-1;
4858  closed_path=(fabs(q->point.x-p->point.x) < DrawEpsilon) &&
4859  (fabs(q->point.y-p->point.y) < DrawEpsilon) ? MagickTrue : MagickFalse;
4860  if ((draw_info->linecap == RoundCap) && (closed_path == MagickFalse))
4861  {
4862  DrawRoundLinecap(image,draw_info,p,exception);
4863  DrawRoundLinecap(image,draw_info,q,exception);
4864  }
4865  }
4866  clone_info=DestroyDrawInfo(clone_info);
4867  if (image->debug != MagickFalse)
4869  " end draw-stroke-polygon");
4870  return(status != 0 ? MagickTrue : MagickFalse);
4871 }
4872 
4873 /*
4874 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4875 % %
4876 % %
4877 % %
4878 % G e t A f f i n e M a t r i x %
4879 % %
4880 % %
4881 % %
4882 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4883 %
4884 % GetAffineMatrix() returns an AffineMatrix initialized to the identity
4885 % matrix.
4886 %
4887 % The format of the GetAffineMatrix method is:
4888 %
4889 % void GetAffineMatrix(AffineMatrix *affine_matrix)
4890 %
4891 % A description of each parameter follows:
4892 %
4893 % o affine_matrix: the affine matrix.
4894 %
4895 */
4897 {
4898  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
4899  assert(affine_matrix != (AffineMatrix *) NULL);
4900  (void) ResetMagickMemory(affine_matrix,0,sizeof(*affine_matrix));
4901  affine_matrix->sx=1.0;
4902  affine_matrix->sy=1.0;
4903 }
4904 
4905 /*
4906 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4907 % %
4908 % %
4909 % %
4910 + G e t D r a w I n f o %
4911 % %
4912 % %
4913 % %
4914 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4915 %
4916 % GetDrawInfo() initializes draw_info to default values from image_info.
4917 %
4918 % The format of the GetDrawInfo method is:
4919 %
4920 % void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
4921 %
4922 % A description of each parameter follows:
4923 %
4924 % o image_info: the image info..
4925 %
4926 % o draw_info: the draw info.
4927 %
4928 */
4929 MagickExport void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
4930 {
4931  char
4932  *next_token;
4933 
4934  const char
4935  *option;
4936 
4938  *exception;
4939 
4940  ImageInfo
4941  *clone_info;
4942 
4943  /*
4944  Initialize draw attributes.
4945  */
4946  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
4947  assert(draw_info != (DrawInfo *) NULL);
4948  (void) ResetMagickMemory(draw_info,0,sizeof(*draw_info));
4949  clone_info=CloneImageInfo(image_info);
4950  GetAffineMatrix(&draw_info->affine);
4951  exception=AcquireExceptionInfo();
4952  (void) QueryColorCompliance("#000F",AllCompliance,&draw_info->fill,
4953  exception);
4954  (void) QueryColorCompliance("#0000",AllCompliance,&draw_info->stroke,
4955  exception);
4956  draw_info->stroke_width=1.0;
4957  draw_info->fill_rule=EvenOddRule;
4958  draw_info->fill_alpha=OpaqueAlpha;
4959  draw_info->stroke_alpha=OpaqueAlpha;
4960  draw_info->linecap=ButtCap;
4961  draw_info->linejoin=MiterJoin;
4962  draw_info->miterlimit=10;
4963  draw_info->decorate=NoDecoration;
4964  draw_info->pointsize=12.0;
4966  draw_info->compose=OverCompositeOp;
4967  draw_info->render=MagickTrue;
4968  draw_info->debug=IsEventLogging();
4969  draw_info->stroke_antialias=clone_info->antialias;
4970  if (clone_info->font != (char *) NULL)
4971  draw_info->font=AcquireString(clone_info->font);
4972  if (clone_info->density != (char *) NULL)
4973  draw_info->density=AcquireString(clone_info->density);
4974  draw_info->text_antialias=clone_info->antialias;
4975  if (fabs(clone_info->pointsize) >= DrawEpsilon)
4976  draw_info->pointsize=clone_info->pointsize;
4977  draw_info->border_color=clone_info->border_color;
4978  if (clone_info->server_name != (char *) NULL)
4979  draw_info->server_name=AcquireString(clone_info->server_name);
4980  option=GetImageOption(clone_info,"direction");
4981  if (option != (const char *) NULL)
4984  else
4985  draw_info->direction=UndefinedDirection;
4986  option=GetImageOption(clone_info,"encoding");
4987  if (option != (const char *) NULL)
4988  (void) CloneString(&draw_info->encoding,option);
4989  option=GetImageOption(clone_info,"family");
4990  if (option != (const char *) NULL)
4991  (void) CloneString(&draw_info->family,option);
4992  option=GetImageOption(clone_info,"fill");
4993  if (option != (const char *) NULL)
4994  (void) QueryColorCompliance(option,AllCompliance,&draw_info->fill,
4995  exception);
4996  option=GetImageOption(clone_info,"gravity");
4997  if (option != (const char *) NULL)
4999  MagickFalse,option);
5000  option=GetImageOption(clone_info,"interline-spacing");
5001  if (option != (const char *) NULL)
5002  draw_info->interline_spacing=StringToDouble(option,&next_token);
5003  option=GetImageOption(clone_info,"interword-spacing");
5004  if (option != (const char *) NULL)
5005  draw_info->interword_spacing=StringToDouble(option,&next_token);
5006  option=GetImageOption(clone_info,"kerning");
5007  if (option != (const char *) NULL)
5008  draw_info->kerning=StringToDouble(option,&next_token);
5009  option=GetImageOption(clone_info,"stroke");
5010  if (option != (const char *) NULL)
5011  (void) QueryColorCompliance(option,AllCompliance,&draw_info->stroke,
5012  exception);
5013  option=GetImageOption(clone_info,"strokewidth");
5014  if (option != (const char *) NULL)
5015  draw_info->stroke_width=StringToDouble(option,&next_token);
5016  option=GetImageOption(clone_info,"style");
5017  if (option != (const char *) NULL)
5019  MagickFalse,option);
5020  option=GetImageOption(clone_info,"undercolor");
5021  if (option != (const char *) NULL)
5022  (void) QueryColorCompliance(option,AllCompliance,&draw_info->undercolor,
5023  exception);
5024  option=GetImageOption(clone_info,"weight");
5025  if (option != (const char *) NULL)
5026  {
5027  ssize_t
5028  weight;
5029 
5031  if (weight == -1)
5032  weight=(ssize_t) StringToUnsignedLong(option);
5033  draw_info->weight=(size_t) weight;
5034  }
5035  exception=DestroyExceptionInfo(exception);
5036  draw_info->signature=MagickCoreSignature;
5037  clone_info=DestroyImageInfo(clone_info);
5038 }
5039 
5040 /*
5041 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5042 % %
5043 % %
5044 % %
5045 + P e r m u t a t e %
5046 % %
5047 % %
5048 % %
5049 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5050 %
5051 % Permutate() returns the permuation of the (n,k).
5052 %
5053 % The format of the Permutate method is:
5054 %
5055 % void Permutate(ssize_t n,ssize_t k)
5056 %
5057 % A description of each parameter follows:
5058 %
5059 % o n:
5060 %
5061 % o k:
5062 %
5063 %
5064 */
5065 static inline double Permutate(const ssize_t n,const ssize_t k)
5066 {
5067  double
5068  r;
5069 
5070  register ssize_t
5071  i;
5072 
5073  r=1.0;
5074  for (i=k+1; i <= n; i++)
5075  r*=i;
5076  for (i=1; i <= (n-k); i++)
5077  r/=i;
5078  return(r);
5079 }
5080 
5081 /*
5082 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5083 % %
5084 % %
5085 % %
5086 + T r a c e P r i m i t i v e %
5087 % %
5088 % %
5089 % %
5090 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5091 %
5092 % TracePrimitive is a collection of methods for generating graphic
5093 % primitives such as arcs, ellipses, paths, etc.
5094 %
5095 */
5096 
5097 static void TraceArc(PrimitiveInfo *primitive_info,const PointInfo start,
5098  const PointInfo end,const PointInfo degrees)
5099 {
5100  PointInfo
5101  center,
5102  radii;
5103 
5104  center.x=0.5*(end.x+start.x);
5105  center.y=0.5*(end.y+start.y);
5106  radii.x=fabs(center.x-start.x);
5107  radii.y=fabs(center.y-start.y);
5108  TraceEllipse(primitive_info,center,radii,degrees);
5109 }
5110 
5111 static void TraceArcPath(PrimitiveInfo *primitive_info,const PointInfo start,
5112  const PointInfo end,const PointInfo arc,const double angle,
5113  const MagickBooleanType large_arc,const MagickBooleanType sweep)
5114 {
5115  double
5116  alpha,
5117  beta,
5118  delta,
5119  factor,
5120  gamma,
5121  theta;
5122 
5123  PointInfo
5124  center,
5125  points[3],
5126  radii;
5127 
5128  register double
5129  cosine,
5130  sine;
5131 
5132  register PrimitiveInfo
5133  *p;
5134 
5135  register ssize_t
5136  i;
5137 
5138  size_t
5139  arc_segments;
5140 
5141  if ((fabs(start.x-end.x) < DrawEpsilon) &&
5142  (fabs(start.y-end.y) < DrawEpsilon))
5143  {
5144  TracePoint(primitive_info,end);
5145  return;
5146  }
5147  radii.x=fabs(arc.x);
5148  radii.y=fabs(arc.y);
5149  if ((fabs(radii.x) < DrawEpsilon) || (fabs(radii.y) < DrawEpsilon))
5150  {
5151  TraceLine(primitive_info,start,end);
5152  return;
5153  }
5154  cosine=cos(DegreesToRadians(fmod((double) angle,360.0)));
5155  sine=sin(DegreesToRadians(fmod((double) angle,360.0)));
5156  center.x=(double) (cosine*(end.x-start.x)/2+sine*(end.y-start.y)/2);
5157  center.y=(double) (cosine*(end.y-start.y)/2-sine*(end.x-start.x)/2);
5158  delta=(center.x*center.x)/(radii.x*radii.x)+(center.y*center.y)/
5159  (radii.y*radii.y);
5160  if (delta < DrawEpsilon)
5161  {
5162  TraceLine(primitive_info,start,end);
5163  return;
5164  }
5165  if (delta > 1.0)
5166  {
5167  radii.x*=sqrt((double) delta);
5168  radii.y*=sqrt((double) delta);
5169  }
5170  points[0].x=(double) (cosine*start.x/radii.x+sine*start.y/radii.x);
5171  points[0].y=(double) (cosine*start.y/radii.y-sine*start.x/radii.y);
5172  points[1].x=(double) (cosine*end.x/radii.x+sine*end.y/radii.x);
5173  points[1].y=(double) (cosine*end.y/radii.y-sine*end.x/radii.y);
5174  alpha=points[1].x-points[0].x;
5175  beta=points[1].y-points[0].y;
5176  factor=PerceptibleReciprocal(alpha*alpha+beta*beta)-0.25;
5177  if (factor <= 0.0)
5178  factor=0.0;
5179  else
5180  {
5181  factor=sqrt((double) factor);
5182  if (sweep == large_arc)
5183  factor=(-factor);
5184  }
5185  center.x=(double) ((points[0].x+points[1].x)/2-factor*beta);
5186  center.y=(double) ((points[0].y+points[1].y)/2+factor*alpha);
5187  alpha=atan2(points[0].y-center.y,points[0].x-center.x);
5188  theta=atan2(points[1].y-center.y,points[1].x-center.x)-alpha;
5189  if ((theta < 0.0) && (sweep != MagickFalse))
5190  theta+=2.0*MagickPI;
5191  else
5192  if ((theta > 0.0) && (sweep == MagickFalse))
5193  theta-=2.0*MagickPI;
5194  arc_segments=(size_t) ceil(fabs((double) (theta/(0.5*MagickPI+DrawEpsilon))));
5195  p=primitive_info;
5196  for (i=0; i < (ssize_t) arc_segments; i++)
5197  {
5198  beta=0.5*((alpha+(i+1)*theta/arc_segments)-(alpha+i*theta/arc_segments));
5199  gamma=(8.0/3.0)*sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))*
5200  sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))/
5201  sin(fmod((double) beta,DegreesToRadians(360.0)));
5202  points[0].x=(double) (center.x+cos(fmod((double) (alpha+(double) i*theta/
5203  arc_segments),DegreesToRadians(360.0)))-gamma*sin(fmod((double) (alpha+
5204  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
5205  points[0].y=(double) (center.y+sin(fmod((double) (alpha+(double) i*theta/
5206  arc_segments),DegreesToRadians(360.0)))+gamma*cos(fmod((double) (alpha+
5207  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
5208  points[2].x=(double) (center.x+cos(fmod((double) (alpha+(double) (i+1)*
5209  theta/arc_segments),DegreesToRadians(360.0))));
5210  points[2].y=(double) (center.y+sin(fmod((double) (alpha+(double) (i+1)*
5211  theta/arc_segments),DegreesToRadians(360.0))));
5212  points[1].x=(double) (points[2].x+gamma*sin(fmod((double) (alpha+(double)
5213  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
5214  points[1].y=(double) (points[2].y-gamma*cos(fmod((double) (alpha+(double)
5215  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
5216  p->point.x=(p == primitive_info) ? start.x : (p-1)->point.x;
5217  p->point.y=(p == primitive_info) ? start.y : (p-1)->point.y;
5218  (p+1)->point.x=(double) (cosine*radii.x*points[0].x-sine*radii.y*
5219  points[0].y);
5220  (p+1)->point.y=(double) (sine*radii.x*points[0].x+cosine*radii.y*
5221  points[0].y);
5222  (p+2)->point.x=(double) (cosine*radii.x*points[1].x-sine*radii.y*
5223  points[1].y);
5224  (p+2)->point.y=(double) (sine*radii.x*points[1].x+cosine*radii.y*
5225  points[1].y);
5226  (p+3)->point.x=(double) (cosine*radii.x*points[2].x-sine*radii.y*
5227  points[2].y);
5228  (p+3)->point.y=(double) (sine*radii.x*points[2].x+cosine*radii.y*
5229  points[2].y);
5230  if (i == (ssize_t) (arc_segments-1))
5231  (p+3)->point=end;
5232  TraceBezier(p,4);
5233  p+=p->coordinates;
5234  }
5235  primitive_info->coordinates=(size_t) (p-primitive_info);
5236  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5237  {
5238  p->primitive=primitive_info->primitive;
5239  p--;
5240  }
5241 }
5242 
5243 static void TraceBezier(PrimitiveInfo *primitive_info,
5244  const size_t number_coordinates)
5245 {
5246  double
5247  alpha,
5248  *coefficients,
5249  weight;
5250 
5251  PointInfo
5252  end,
5253  point,
5254  *points;
5255 
5256  register PrimitiveInfo
5257  *p;
5258 
5259  register ssize_t
5260  i,
5261  j;
5262 
5263  size_t
5264  control_points,
5265  quantum;
5266 
5267  /*
5268  Allocate coeficients.
5269  */
5270  quantum=number_coordinates;
5271  for (i=0; i < (ssize_t) number_coordinates; i++)
5272  {
5273  for (j=i+1; j < (ssize_t) number_coordinates; j++)
5274  {
5275  alpha=fabs(primitive_info[j].point.x-primitive_info[i].point.x);
5276  if (alpha > (double) quantum)
5277  quantum=(size_t) alpha;
5278  alpha=fabs(primitive_info[j].point.y-primitive_info[i].point.y);
5279  if (alpha > (double) quantum)
5280  quantum=(size_t) alpha;
5281  }
5282  }
5283  quantum=(size_t) MagickMin((double) quantum/number_coordinates,
5284  (double) BezierQuantum);
5285  control_points=quantum*number_coordinates;
5286  coefficients=(double *) AcquireQuantumMemory((size_t)
5287  number_coordinates,sizeof(*coefficients));
5288  points=(PointInfo *) AcquireQuantumMemory((size_t) control_points,
5289  sizeof(*points));
5290  if ((coefficients == (double *) NULL) || (points == (PointInfo *) NULL))
5291  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
5292  /*
5293  Compute bezier points.
5294  */
5295  end=primitive_info[number_coordinates-1].point;
5296  for (i=0; i < (ssize_t) number_coordinates; i++)
5297  coefficients[i]=Permutate((ssize_t) number_coordinates-1,i);
5298  weight=0.0;
5299  for (i=0; i < (ssize_t) control_points; i++)
5300  {
5301  p=primitive_info;
5302  point.x=0.0;
5303  point.y=0.0;
5304  alpha=pow((double) (1.0-weight),(double) number_coordinates-1.0);
5305  for (j=0; j < (ssize_t) number_coordinates; j++)
5306  {
5307  point.x+=alpha*coefficients[j]*p->point.x;
5308  point.y+=alpha*coefficients[j]*p->point.y;
5309  alpha*=weight/(1.0-weight);
5310  p++;
5311  }
5312  points[i]=point;
5313  weight+=1.0/control_points;
5314  }
5315  /*
5316  Bezier curves are just short segmented polys.
5317  */
5318  p=primitive_info;
5319  for (i=0; i < (ssize_t) control_points; i++)
5320  {
5321  TracePoint(p,points[i]);
5322  p+=p->coordinates;
5323  }
5324  TracePoint(p,end);
5325  p+=p->coordinates;
5326  primitive_info->coordinates=(size_t) (p-primitive_info);
5327  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5328  {
5329  p->primitive=primitive_info->primitive;
5330  p--;
5331  }
5332  points=(PointInfo *) RelinquishMagickMemory(points);
5333  coefficients=(double *) RelinquishMagickMemory(coefficients);
5334 }
5335 
5336 static void TraceCircle(PrimitiveInfo *primitive_info,const PointInfo start,
5337  const PointInfo end)
5338 {
5339  double
5340  alpha,
5341  beta,
5342  radius;
5343 
5344  PointInfo
5345  offset,
5346  degrees;
5347 
5348  alpha=end.x-start.x;
5349  beta=end.y-start.y;
5350  radius=hypot((double) alpha,(double) beta);
5351  offset.x=(double) radius;
5352  offset.y=(double) radius;
5353  degrees.x=0.0;
5354  degrees.y=360.0;
5355  TraceEllipse(primitive_info,start,offset,degrees);
5356 }
5357 
5358 static void TraceEllipse(PrimitiveInfo *primitive_info,const PointInfo start,
5359  const PointInfo stop,const PointInfo degrees)
5360 {
5361  double
5362  delta,
5363  step,
5364  y;
5365 
5366  PointInfo
5367  angle,
5368  point;
5369 
5370  register PrimitiveInfo
5371  *p;
5372 
5373  register ssize_t
5374  i;
5375 
5376  /*
5377  Ellipses are just short segmented polys.
5378  */
5379  if ((fabs(stop.x) < DrawEpsilon) && (fabs(stop.y) < DrawEpsilon))
5380  {
5381  TracePoint(primitive_info,start);
5382  return;
5383  }
5384  delta=2.0/MagickMax(stop.x,stop.y);
5385  step=MagickPI/8.0;
5386  if ((delta >= 0.0) && (delta < (MagickPI/8.0)))
5387  step=MagickPI/(4*(MagickPI/delta/2+0.5));
5388  angle.x=DegreesToRadians(degrees.x);
5389  y=degrees.y;
5390  while (y < degrees.x)
5391  y+=360.0;
5392  angle.y=DegreesToRadians(y);
5393  for (p=primitive_info; angle.