MagickCore  7.0.2
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("#0000",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  DrawInfo
1692  **graphic_context;
1693 
1695  proceed;
1696 
1698  length,
1699  number_points;
1700 
1702  status;
1703 
1704  double
1705  angle,
1706  factor,
1707  primitive_extent;
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  /*
1741  Ensure the annotation info is valid.
1742  */
1743  assert(image != (Image *) NULL);
1744  assert(image->signature == MagickCoreSignature);
1745  if (image->debug != MagickFalse)
1746  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1747  assert(draw_info != (DrawInfo *) NULL);
1748  assert(draw_info->signature == MagickCoreSignature);
1749  if (image->debug != MagickFalse)
1750  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
1751  if ((draw_info->primitive == (char *) NULL) ||
1752  (*draw_info->primitive == '\0'))
1753  return(MagickFalse);
1754  if (image->debug != MagickFalse)
1755  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"begin draw-image");
1756  if (*draw_info->primitive != '@')
1757  primitive=AcquireString(draw_info->primitive);
1758  else
1759  primitive=FileToString(draw_info->primitive+1,~0UL,exception);
1760  if (primitive == (char *) NULL)
1761  return(MagickFalse);
1762  primitive_extent=(double) strlen(primitive);
1763  (void) SetImageArtifact(image,"MVG",primitive);
1764  n=0;
1765  number_stops=0;
1766  stops=(StopInfo *) NULL;
1767  /*
1768  Allocate primitive info memory.
1769  */
1770  graphic_context=(DrawInfo **) AcquireMagickMemory(
1771  sizeof(*graphic_context));
1772  if (graphic_context == (DrawInfo **) NULL)
1773  {
1774  primitive=DestroyString(primitive);
1775  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
1776  image->filename);
1777  }
1778  number_points=6553;
1779  primitive_info=(PrimitiveInfo *) AcquireQuantumMemory((size_t) number_points,
1780  sizeof(*primitive_info));
1781  if (primitive_info == (PrimitiveInfo *) NULL)
1782  {
1783  primitive=DestroyString(primitive);
1784  for ( ; n >= 0; n--)
1785  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
1786  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
1787  ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
1788  image->filename);
1789  }
1790  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1791  graphic_context[n]->viewbox=image->page;
1792  if ((image->page.width == 0) || (image->page.height == 0))
1793  {
1794  graphic_context[n]->viewbox.width=image->columns;
1795  graphic_context[n]->viewbox.height=image->rows;
1796  }
1797  token=AcquireString(primitive);
1798  extent=strlen(token)+MagickPathExtent;
1799  if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
1800  return(MagickFalse);
1801  status=MagickTrue;
1802  for (q=primitive; *q != '\0'; )
1803  {
1804  /*
1805  Interpret graphic primitive.
1806  */
1807  GetNextToken(q,&q,MagickPathExtent,keyword);
1808  if (*keyword == '\0')
1809  break;
1810  if (*keyword == '#')
1811  {
1812  /*
1813  Comment.
1814  */
1815  while ((*q != '\n') && (*q != '\0'))
1816  q++;
1817  continue;
1818  }
1819  p=q-strlen(keyword)-1;
1820  primitive_type=UndefinedPrimitive;
1821  current=graphic_context[n]->affine;
1822  GetAffineMatrix(&affine);
1823  switch (*keyword)
1824  {
1825  case ';':
1826  break;
1827  case 'a':
1828  case 'A':
1829  {
1830  if (LocaleCompare("affine",keyword) == 0)
1831  {
1832  GetNextToken(q,&q,extent,token);
1833  affine.sx=StringToDouble(token,&next_token);
1834  if (token == next_token)
1835  status=MagickFalse;
1836  GetNextToken(q,&q,extent,token);
1837  if (*token == ',')
1838  GetNextToken(q,&q,extent,token);
1839  affine.rx=StringToDouble(token,&next_token);
1840  if (token == next_token)
1841  status=MagickFalse;
1842  GetNextToken(q,&q,extent,token);
1843  if (*token == ',')
1844  GetNextToken(q,&q,extent,token);
1845  affine.ry=StringToDouble(token,&next_token);
1846  if (token == next_token)
1847  status=MagickFalse;
1848  GetNextToken(q,&q,extent,token);
1849  if (*token == ',')
1850  GetNextToken(q,&q,extent,token);
1851  affine.sy=StringToDouble(token,&next_token);
1852  if (token == next_token)
1853  status=MagickFalse;
1854  GetNextToken(q,&q,extent,token);
1855  if (*token == ',')
1856  GetNextToken(q,&q,extent,token);
1857  affine.tx=StringToDouble(token,&next_token);
1858  if (token == next_token)
1859  status=MagickFalse;
1860  GetNextToken(q,&q,extent,token);
1861  if (*token == ',')
1862  GetNextToken(q,&q,extent,token);
1863  affine.ty=StringToDouble(token,&next_token);
1864  if (token == next_token)
1865  status=MagickFalse;
1866  break;
1867  }
1868  if (LocaleCompare("alpha",keyword) == 0)
1869  {
1870  primitive_type=AlphaPrimitive;
1871  break;
1872  }
1873  if (LocaleCompare("arc",keyword) == 0)
1874  {
1875  primitive_type=ArcPrimitive;
1876  break;
1877  }
1878  status=MagickFalse;
1879  break;
1880  }
1881  case 'b':
1882  case 'B':
1883  {
1884  if (LocaleCompare("bezier",keyword) == 0)
1885  {
1886  primitive_type=BezierPrimitive;
1887  break;
1888  }
1889  if (LocaleCompare("border-color",keyword) == 0)
1890  {
1891  GetNextToken(q,&q,extent,token);
1892  (void) QueryColorCompliance(token,AllCompliance,
1893  &graphic_context[n]->border_color,exception);
1894  break;
1895  }
1896  status=MagickFalse;
1897  break;
1898  }
1899  case 'c':
1900  case 'C':
1901  {
1902  if (LocaleCompare("clip-path",keyword) == 0)
1903  {
1904  /*
1905  Create clip mask.
1906  */
1907  GetNextToken(q,&q,extent,token);
1908  (void) CloneString(&graphic_context[n]->clip_mask,token);
1909  (void) DrawClipPath(image,graphic_context[n],
1910  graphic_context[n]->clip_mask,exception);
1911  break;
1912  }
1913  if (LocaleCompare("clip-rule",keyword) == 0)
1914  {
1915  ssize_t
1916  fill_rule;
1917 
1918  GetNextToken(q,&q,extent,token);
1920  token);
1921  if (fill_rule == -1)
1922  status=MagickFalse;
1923  else
1924  graphic_context[n]->fill_rule=(FillRule) fill_rule;
1925  break;
1926  }
1927  if (LocaleCompare("clip-units",keyword) == 0)
1928  {
1929  ssize_t
1930  clip_units;
1931 
1932  GetNextToken(q,&q,extent,token);
1934  token);
1935  if (clip_units == -1)
1936  {
1937  status=MagickFalse;
1938  break;
1939  }
1940  graphic_context[n]->clip_units=(ClipPathUnits) clip_units;
1941  if (clip_units == ObjectBoundingBox)
1942  {
1943  GetAffineMatrix(&current);
1944  affine.sx=draw_info->bounds.x2;
1945  affine.sy=draw_info->bounds.y2;
1946  affine.tx=draw_info->bounds.x1;
1947  affine.ty=draw_info->bounds.y1;
1948  break;
1949  }
1950  break;
1951  }
1952  if (LocaleCompare("circle",keyword) == 0)
1953  {
1954  primitive_type=CirclePrimitive;
1955  break;
1956  }
1957  if (LocaleCompare("color",keyword) == 0)
1958  {
1959  primitive_type=ColorPrimitive;
1960  break;
1961  }
1962  status=MagickFalse;
1963  break;
1964  }
1965  case 'd':
1966  case 'D':
1967  {
1968  if (LocaleCompare("decorate",keyword) == 0)
1969  {
1970  ssize_t
1971  decorate;
1972 
1973  GetNextToken(q,&q,extent,token);
1975  token);
1976  if (decorate == -1)
1977  status=MagickFalse;
1978  else
1979  graphic_context[n]->decorate=(DecorationType) decorate;
1980  break;
1981  }
1982  if (LocaleCompare("density",keyword) == 0)
1983  {
1984  GetNextToken(q,&q,extent,token);
1985  (void) CloneString(&graphic_context[n]->density,token);
1986  break;
1987  }
1988  if (LocaleCompare("direction",keyword) == 0)
1989  {
1990  ssize_t
1991  direction;
1992 
1993  GetNextToken(q,&q,extent,token);
1995  token);
1996  if (direction == -1)
1997  status=MagickFalse;
1998  else
1999  graphic_context[n]->direction=(DirectionType) direction;
2000  break;
2001  }
2002  status=MagickFalse;
2003  break;
2004  }
2005  case 'e':
2006  case 'E':
2007  {
2008  if (LocaleCompare("ellipse",keyword) == 0)
2009  {
2010  primitive_type=EllipsePrimitive;
2011  break;
2012  }
2013  if (LocaleCompare("encoding",keyword) == 0)
2014  {
2015  GetNextToken(q,&q,extent,token);
2016  (void) CloneString(&graphic_context[n]->encoding,token);
2017  break;
2018  }
2019  status=MagickFalse;
2020  break;
2021  }
2022  case 'f':
2023  case 'F':
2024  {
2025  if (LocaleCompare("fill",keyword) == 0)
2026  {
2027  GetNextToken(q,&q,extent,token);
2028  (void) FormatLocaleString(pattern,MagickPathExtent,"%s",token);
2029  if (GetImageArtifact(image,pattern) != (const char *) NULL)
2030  (void) DrawPatternPath(image,draw_info,token,
2031  &graphic_context[n]->fill_pattern,exception);
2032  else
2033  {
2034  status&=QueryColorCompliance(token,AllCompliance,
2035  &graphic_context[n]->fill,exception);
2036  if (graphic_context[n]->fill_alpha != OpaqueAlpha)
2037  graphic_context[n]->fill.alpha=graphic_context[n]->fill_alpha;
2038  if (status == MagickFalse)
2039  {
2040  ImageInfo
2041  *pattern_info;
2042 
2043  pattern_info=AcquireImageInfo();
2044  (void) CopyMagickString(pattern_info->filename,token,
2046  graphic_context[n]->fill_pattern=ReadImage(pattern_info,
2047  exception);
2048  CatchException(exception);
2049  pattern_info=DestroyImageInfo(pattern_info);
2050  }
2051  }
2052  break;
2053  }
2054  if (LocaleCompare("fill-opacity",keyword) == 0)
2055  {
2056  GetNextToken(q,&q,extent,token);
2057  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2058  graphic_context[n]->fill_alpha=(double) QuantumRange*(1.0-factor*
2059  StringToDouble(token,&next_token));
2060  if (token == next_token)
2061  status=MagickFalse;
2062  break;
2063  }
2064  if (LocaleCompare("fill-rule",keyword) == 0)
2065  {
2066  ssize_t
2067  fill_rule;
2068 
2069  GetNextToken(q,&q,extent,token);
2071  token);
2072  if (fill_rule == -1)
2073  status=MagickFalse;
2074  else
2075  graphic_context[n]->fill_rule=(FillRule) fill_rule;
2076  break;
2077  }
2078  if (LocaleCompare("font",keyword) == 0)
2079  {
2080  GetNextToken(q,&q,extent,token);
2081  (void) CloneString(&graphic_context[n]->font,token);
2082  if (LocaleCompare("none",token) == 0)
2083  graphic_context[n]->font=(char *) RelinquishMagickMemory(
2084  graphic_context[n]->font);
2085  break;
2086  }
2087  if (LocaleCompare("font-family",keyword) == 0)
2088  {
2089  GetNextToken(q,&q,extent,token);
2090  (void) CloneString(&graphic_context[n]->family,token);
2091  break;
2092  }
2093  if (LocaleCompare("font-size",keyword) == 0)
2094  {
2095  GetNextToken(q,&q,extent,token);
2096  graphic_context[n]->pointsize=StringToDouble(token,&next_token);
2097  if (token == next_token)
2098  status=MagickFalse;
2099  break;
2100  }
2101  if (LocaleCompare("font-stretch",keyword) == 0)
2102  {
2103  ssize_t
2104  stretch;
2105 
2106  GetNextToken(q,&q,extent,token);
2108  if (stretch == -1)
2109  status=MagickFalse;
2110  else
2111  graphic_context[n]->stretch=(StretchType) stretch;
2112  break;
2113  }
2114  if (LocaleCompare("font-style",keyword) == 0)
2115  {
2116  ssize_t
2117  style;
2118 
2119  GetNextToken(q,&q,extent,token);
2121  if (style == -1)
2122  status=MagickFalse;
2123  else
2124  graphic_context[n]->style=(StyleType) style;
2125  break;
2126  }
2127  if (LocaleCompare("font-weight",keyword) == 0)
2128  {
2129  ssize_t
2130  weight;
2131 
2132  GetNextToken(q,&q,extent,token);
2134  if (weight == -1)
2135  weight=(ssize_t) StringToUnsignedLong(token);
2136  graphic_context[n]->weight=(size_t) weight;
2137  break;
2138  }
2139  status=MagickFalse;
2140  break;
2141  }
2142  case 'g':
2143  case 'G':
2144  {
2145  if (LocaleCompare("gradient-units",keyword) == 0)
2146  {
2147  GetNextToken(q,&q,extent,token);
2148  break;
2149  }
2150  if (LocaleCompare("gravity",keyword) == 0)
2151  {
2152  ssize_t
2153  gravity;
2154 
2155  GetNextToken(q,&q,extent,token);
2157  if (gravity == -1)
2158  status=MagickFalse;
2159  else
2160  graphic_context[n]->gravity=(GravityType) gravity;
2161  break;
2162  }
2163  status=MagickFalse;
2164  break;
2165  }
2166  case 'i':
2167  case 'I':
2168  {
2169  if (LocaleCompare("image",keyword) == 0)
2170  {
2171  ssize_t
2172  compose;
2173 
2174  primitive_type=ImagePrimitive;
2175  GetNextToken(q,&q,extent,token);
2177  if (compose == -1)
2178  status=MagickFalse;
2179  else
2180  graphic_context[n]->compose=(CompositeOperator) compose;
2181  break;
2182  }
2183  if (LocaleCompare("interline-spacing",keyword) == 0)
2184  {
2185  GetNextToken(q,&q,extent,token);
2186  graphic_context[n]->interline_spacing=StringToDouble(token,
2187  &next_token);
2188  if (token == next_token)
2189  status=MagickFalse;
2190  break;
2191  }
2192  if (LocaleCompare("interword-spacing",keyword) == 0)
2193  {
2194  GetNextToken(q,&q,extent,token);
2195  graphic_context[n]->interword_spacing=StringToDouble(token,
2196  &next_token);
2197  if (token == next_token)
2198  status=MagickFalse;
2199  break;
2200  }
2201  status=MagickFalse;
2202  break;
2203  }
2204  case 'k':
2205  case 'K':
2206  {
2207  if (LocaleCompare("kerning",keyword) == 0)
2208  {
2209  GetNextToken(q,&q,extent,token);
2210  graphic_context[n]->kerning=StringToDouble(token,&next_token);
2211  if (token == next_token)
2212  status=MagickFalse;
2213  break;
2214  }
2215  status=MagickFalse;
2216  break;
2217  }
2218  case 'l':
2219  case 'L':
2220  {
2221  if (LocaleCompare("line",keyword) == 0)
2222  primitive_type=LinePrimitive;
2223  else
2224  status=MagickFalse;
2225  break;
2226  }
2227  case 'o':
2228  case 'O':
2229  {
2230  if (LocaleCompare("offset",keyword) == 0)
2231  {
2232  GetNextToken(q,&q,extent,token);
2233  break;
2234  }
2235  if (LocaleCompare("opacity",keyword) == 0)
2236  {
2237  GetNextToken(q,&q,extent,token);
2238  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2239  graphic_context[n]->fill_alpha=QuantumRange*(1.0-(QuantumScale*
2240  graphic_context[n]->fill_alpha*(1.0-factor*StringToDouble(token,
2241  &next_token))));
2242  graphic_context[n]->stroke_alpha=QuantumRange*(1.0-(QuantumScale*
2243  graphic_context[n]->stroke_alpha*(1.0-factor*StringToDouble(token,
2244  &next_token))));
2245  if (token == next_token)
2246  status=MagickFalse;
2247  break;
2248  }
2249  status=MagickFalse;
2250  break;
2251  }
2252  case 'p':
2253  case 'P':
2254  {
2255  if (LocaleCompare("path",keyword) == 0)
2256  {
2257  primitive_type=PathPrimitive;
2258  break;
2259  }
2260  if (LocaleCompare("point",keyword) == 0)
2261  {
2262  primitive_type=PointPrimitive;
2263  break;
2264  }
2265  if (LocaleCompare("polyline",keyword) == 0)
2266  {
2267  primitive_type=PolylinePrimitive;
2268  break;
2269  }
2270  if (LocaleCompare("polygon",keyword) == 0)
2271  {
2272  primitive_type=PolygonPrimitive;
2273  break;
2274  }
2275  if (LocaleCompare("pop",keyword) == 0)
2276  {
2277  GetNextToken(q,&q,extent,token);
2278  if (LocaleCompare("clip-path",token) == 0)
2279  break;
2280  if (LocaleCompare("defs",token) == 0)
2281  break;
2282  if (LocaleCompare("gradient",token) == 0)
2283  break;
2284  if (LocaleCompare("graphic-context",token) == 0)
2285  {
2286  if (n <= 0)
2287  {
2288  (void) ThrowMagickException(exception,GetMagickModule(),
2289  DrawError,"UnbalancedGraphicContextPushPop","`%s'",token);
2290  status=MagickFalse;
2291  n=0;
2292  break;
2293  }
2294  if (graphic_context[n]->clip_mask != (char *) NULL)
2295  if (LocaleCompare(graphic_context[n]->clip_mask,
2296  graphic_context[n-1]->clip_mask) != 0)
2297  (void) SetImageMask(image,ReadPixelMask,(Image *) NULL,
2298  exception);
2299  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
2300  n--;
2301  break;
2302  }
2303  if (LocaleCompare("pattern",token) == 0)
2304  break;
2305  status=MagickFalse;
2306  break;
2307  }
2308  if (LocaleCompare("push",keyword) == 0)
2309  {
2310  GetNextToken(q,&q,extent,token);
2311  if (LocaleCompare("clip-path",token) == 0)
2312  {
2313  char
2314  name[MagickPathExtent];
2315 
2316  GetNextToken(q,&q,extent,token);
2317  (void) FormatLocaleString(name,MagickPathExtent,"%s",token);
2318  for (p=q; *q != '\0'; )
2319  {
2320  GetNextToken(q,&q,extent,token);
2321  if (LocaleCompare(token,"pop") != 0)
2322  continue;
2323  GetNextToken(q,(const char **) NULL,extent,token);
2324  if (LocaleCompare(token,"clip-path") != 0)
2325  continue;
2326  break;
2327  }
2328  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2329  (void) SetImageArtifact(image,name,token);
2330  GetNextToken(q,&q,extent,token);
2331  break;
2332  }
2333  if (LocaleCompare("gradient",token) == 0)
2334  {
2335  char
2336  key[2*MagickPathExtent],
2337  name[MagickPathExtent],
2338  type[MagickPathExtent];
2339 
2340  SegmentInfo
2341  segment;
2342 
2343  GetNextToken(q,&q,extent,token);
2344  (void) CopyMagickString(name,token,MagickPathExtent);
2345  GetNextToken(q,&q,extent,token);
2346  (void) CopyMagickString(type,token,MagickPathExtent);
2347  GetNextToken(q,&q,extent,token);
2348  segment.x1=StringToDouble(token,&next_token);
2349  if (token == next_token)
2350  status=MagickFalse;
2351  GetNextToken(q,&q,extent,token);
2352  if (*token == ',')
2353  GetNextToken(q,&q,extent,token);
2354  segment.y1=StringToDouble(token,&next_token);
2355  if (token == next_token)
2356  status=MagickFalse;
2357  GetNextToken(q,&q,extent,token);
2358  if (*token == ',')
2359  GetNextToken(q,&q,extent,token);
2360  segment.x2=StringToDouble(token,&next_token);
2361  if (token == next_token)
2362  status=MagickFalse;
2363  GetNextToken(q,&q,extent,token);
2364  if (*token == ',')
2365  GetNextToken(q,&q,extent,token);
2366  segment.y2=StringToDouble(token,&next_token);
2367  if (token == next_token)
2368  status=MagickFalse;
2369  if (LocaleCompare(type,"radial") == 0)
2370  {
2371  GetNextToken(q,&q,extent,token);
2372  if (*token == ',')
2373  GetNextToken(q,&q,extent,token);
2374  }
2375  for (p=q; *q != '\0'; )
2376  {
2377  GetNextToken(q,&q,extent,token);
2378  if (LocaleCompare(token,"pop") != 0)
2379  continue;
2380  GetNextToken(q,(const char **) NULL,extent,token);
2381  if (LocaleCompare(token,"gradient") != 0)
2382  continue;
2383  break;
2384  }
2385  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2386  bounds.x1=graphic_context[n]->affine.sx*segment.x1+
2387  graphic_context[n]->affine.ry*segment.y1+
2388  graphic_context[n]->affine.tx;
2389  bounds.y1=graphic_context[n]->affine.rx*segment.x1+
2390  graphic_context[n]->affine.sy*segment.y1+
2391  graphic_context[n]->affine.ty;
2392  bounds.x2=graphic_context[n]->affine.sx*segment.x2+
2393  graphic_context[n]->affine.ry*segment.y2+
2394  graphic_context[n]->affine.tx;
2395  bounds.y2=graphic_context[n]->affine.rx*segment.x2+
2396  graphic_context[n]->affine.sy*segment.y2+
2397  graphic_context[n]->affine.ty;
2398  (void) FormatLocaleString(key,MagickPathExtent,"%s",name);
2399  (void) SetImageArtifact(image,key,token);
2400  (void) FormatLocaleString(key,MagickPathExtent,"%s-type",name);
2401  (void) SetImageArtifact(image,key,type);
2402  (void) FormatLocaleString(key,MagickPathExtent,"%s-geometry",
2403  name);
2404  (void) FormatLocaleString(geometry,MagickPathExtent,
2405  "%gx%g%+.15g%+.15g",
2406  MagickMax(fabs(bounds.x2-bounds.x1+1.0),1.0),
2407  MagickMax(fabs(bounds.y2-bounds.y1+1.0),1.0),
2408  bounds.x1,bounds.y1);
2409  (void) SetImageArtifact(image,key,geometry);
2410  GetNextToken(q,&q,extent,token);
2411  break;
2412  }
2413  if (LocaleCompare("pattern",token) == 0)
2414  {
2415  char
2416  key[2*MagickPathExtent],
2417  name[MagickPathExtent];
2418 
2420  pattern_bounds;
2421 
2422  GetNextToken(q,&q,extent,token);
2423  (void) CopyMagickString(name,token,MagickPathExtent);
2424  GetNextToken(q,&q,extent,token);
2425  pattern_bounds.x=(ssize_t) ceil(StringToDouble(token,
2426  &next_token)-0.5);
2427  if (token == next_token)
2428  status=MagickFalse;
2429  GetNextToken(q,&q,extent,token);
2430  if (*token == ',')
2431  GetNextToken(q,&q,extent,token);
2432  pattern_bounds.y=(ssize_t) ceil(StringToDouble(token,
2433  &next_token)-0.5);
2434  if (token == next_token)
2435  status=MagickFalse;
2436  GetNextToken(q,&q,extent,token);
2437  if (*token == ',')
2438  GetNextToken(q,&q,extent,token);
2439  pattern_bounds.width=(size_t) floor(StringToDouble(token,
2440  &next_token)+0.5);
2441  if (token == next_token)
2442  status=MagickFalse;
2443  GetNextToken(q,&q,extent,token);
2444  if (*token == ',')
2445  GetNextToken(q,&q,extent,token);
2446  pattern_bounds.height=(size_t) floor(StringToDouble(token,
2447  &next_token)+0.5);
2448  if (token == next_token)
2449  status=MagickFalse;
2450  for (p=q; *q != '\0'; )
2451  {
2452  GetNextToken(q,&q,extent,token);
2453  if (LocaleCompare(token,"pop") != 0)
2454  continue;
2455  GetNextToken(q,(const char **) NULL,extent,token);
2456  if (LocaleCompare(token,"pattern") != 0)
2457  continue;
2458  break;
2459  }
2460  (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2461  (void) FormatLocaleString(key,MagickPathExtent,"%s",name);
2462  (void) SetImageArtifact(image,key,token);
2463  (void) FormatLocaleString(key,MagickPathExtent,"%s-geometry",
2464  name);
2465  (void) FormatLocaleString(geometry,MagickPathExtent,
2466  "%.20gx%.20g%+.20g%+.20g",(double)pattern_bounds.width,
2467  (double)pattern_bounds.height,(double)pattern_bounds.x,
2468  (double)pattern_bounds.y);
2469  (void) SetImageArtifact(image,key,geometry);
2470  GetNextToken(q,&q,extent,token);
2471  break;
2472  }
2473  if (LocaleCompare("graphic-context",token) == 0)
2474  {
2475  n++;
2476  graphic_context=(DrawInfo **) ResizeQuantumMemory(
2477  graphic_context,(size_t) (n+1),sizeof(*graphic_context));
2478  if (graphic_context == (DrawInfo **) NULL)
2479  {
2480  (void) ThrowMagickException(exception,GetMagickModule(),
2481  ResourceLimitError,"MemoryAllocationFailed","`%s'",
2482  image->filename);
2483  break;
2484  }
2485  graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,
2486  graphic_context[n-1]);
2487  break;
2488  }
2489  if (LocaleCompare("defs",token) == 0)
2490  break;
2491  status=MagickFalse;
2492  break;
2493  }
2494  status=MagickFalse;
2495  break;
2496  }
2497  case 'r':
2498  case 'R':
2499  {
2500  if (LocaleCompare("rectangle",keyword) == 0)
2501  {
2502  primitive_type=RectanglePrimitive;
2503  break;
2504  }
2505  if (LocaleCompare("rotate",keyword) == 0)
2506  {
2507  GetNextToken(q,&q,extent,token);
2508  angle=StringToDouble(token,&next_token);
2509  if (token == next_token)
2510  status=MagickFalse;
2511  affine.sx=cos(DegreesToRadians(fmod((double) angle,360.0)));
2512  affine.rx=sin(DegreesToRadians(fmod((double) angle,360.0)));
2513  affine.ry=(-sin(DegreesToRadians(fmod((double) angle,360.0))));
2514  affine.sy=cos(DegreesToRadians(fmod((double) angle,360.0)));
2515  break;
2516  }
2517  if (LocaleCompare("roundRectangle",keyword) == 0)
2518  {
2519  primitive_type=RoundRectanglePrimitive;
2520  break;
2521  }
2522  status=MagickFalse;
2523  break;
2524  }
2525  case 's':
2526  case 'S':
2527  {
2528  if (LocaleCompare("scale",keyword) == 0)
2529  {
2530  GetNextToken(q,&q,extent,token);
2531  affine.sx=StringToDouble(token,&next_token);
2532  if (token == next_token)
2533  status=MagickFalse;
2534  GetNextToken(q,&q,extent,token);
2535  if (*token == ',')
2536  GetNextToken(q,&q,extent,token);
2537  affine.sy=StringToDouble(token,&next_token);
2538  if (token == next_token)
2539  status=MagickFalse;
2540  break;
2541  }
2542  if (LocaleCompare("skewX",keyword) == 0)
2543  {
2544  GetNextToken(q,&q,extent,token);
2545  angle=StringToDouble(token,&next_token);
2546  if (token == next_token)
2547  status=MagickFalse;
2548  affine.ry=sin(DegreesToRadians(angle));
2549  break;
2550  }
2551  if (LocaleCompare("skewY",keyword) == 0)
2552  {
2553  GetNextToken(q,&q,extent,token);
2554  angle=StringToDouble(token,&next_token);
2555  if (token == next_token)
2556  status=MagickFalse;
2557  affine.rx=(-tan(DegreesToRadians(angle)/2.0));
2558  break;
2559  }
2560  if (LocaleCompare("stop-color",keyword) == 0)
2561  {
2562  PixelInfo
2563  stop_color;
2564 
2565  number_stops++;
2566  if (number_stops == 1)
2567  stops=(StopInfo *) AcquireQuantumMemory(2,sizeof(*stops));
2568  else if (number_stops > 2)
2569  stops=(StopInfo *) ResizeQuantumMemory(stops,number_stops,
2570  sizeof(*stops));
2571  if (stops == (StopInfo *) NULL)
2572  {
2573  (void) ThrowMagickException(exception,GetMagickModule(),
2574  ResourceLimitError,"MemoryAllocationFailed","`%s'",
2575  image->filename);
2576  break;
2577  }
2578  GetNextToken(q,&q,extent,token);
2579  (void) QueryColorCompliance(token,AllCompliance,&stop_color,
2580  exception);
2581  stops[number_stops-1].color=stop_color;
2582  GetNextToken(q,&q,extent,token);
2583  stops[number_stops-1].offset=StringToDouble(token,&next_token);
2584  if (token == next_token)
2585  status=MagickFalse;
2586  break;
2587  }
2588  if (LocaleCompare("stroke",keyword) == 0)
2589  {
2590  GetNextToken(q,&q,extent,token);
2591  (void) FormatLocaleString(pattern,MagickPathExtent,"%s",token);
2592  if (GetImageArtifact(image,pattern) != (const char *) NULL)
2593  (void) DrawPatternPath(image,draw_info,token,
2594  &graphic_context[n]->stroke_pattern,exception);
2595  else
2596  {
2597  status&=QueryColorCompliance(token,AllCompliance,
2598  &graphic_context[n]->stroke,exception);
2599  if (graphic_context[n]->stroke_alpha != OpaqueAlpha)
2600  graphic_context[n]->stroke.alpha=
2601  graphic_context[n]->stroke_alpha;
2602  if (status == MagickFalse)
2603  {
2604  ImageInfo
2605  *pattern_info;
2606 
2607  pattern_info=AcquireImageInfo();
2608  (void) CopyMagickString(pattern_info->filename,token,
2610  graphic_context[n]->stroke_pattern=ReadImage(pattern_info,
2611  exception);
2612  CatchException(exception);
2613  pattern_info=DestroyImageInfo(pattern_info);
2614  }
2615  }
2616  break;
2617  }
2618  if (LocaleCompare("stroke-antialias",keyword) == 0)
2619  {
2620  GetNextToken(q,&q,extent,token);
2621  graphic_context[n]->stroke_antialias=
2622  StringToLong(token) != 0 ? MagickTrue : MagickFalse;
2623  break;
2624  }
2625  if (LocaleCompare("stroke-dasharray",keyword) == 0)
2626  {
2627  if (graphic_context[n]->dash_pattern != (double *) NULL)
2628  graphic_context[n]->dash_pattern=(double *)
2629  RelinquishMagickMemory(graphic_context[n]->dash_pattern);
2630  if (IsPoint(q) != MagickFalse)
2631  {
2632  const char
2633  *r;
2634 
2635  r=q;
2636  GetNextToken(r,&r,extent,token);
2637  if (*token == ',')
2638  GetNextToken(r,&r,extent,token);
2639  for (x=0; IsPoint(token) != MagickFalse; x++)
2640  {
2641  GetNextToken(r,&r,extent,token);
2642  if (*token == ',')
2643  GetNextToken(r,&r,extent,token);
2644  }
2645  graphic_context[n]->dash_pattern=(double *)
2646  AcquireQuantumMemory((size_t) (2UL*x+1UL),
2647  sizeof(*graphic_context[n]->dash_pattern));
2648  if (graphic_context[n]->dash_pattern == (double *) NULL)
2649  {
2650  (void) ThrowMagickException(exception,GetMagickModule(),
2651  ResourceLimitError,"MemoryAllocationFailed","`%s'",
2652  image->filename);
2653  status=MagickFalse;
2654  break;
2655  }
2656  for (j=0; j < x; j++)
2657  {
2658  GetNextToken(q,&q,extent,token);
2659  if (*token == ',')
2660  GetNextToken(q,&q,extent,token);
2661  graphic_context[n]->dash_pattern[j]=StringToDouble(token,
2662  &next_token);
2663  if (token == next_token)
2664  status=MagickFalse;
2665  if (graphic_context[n]->dash_pattern[j] < 0.0)
2666  status=MagickFalse;
2667  }
2668  if ((x & 0x01) != 0)
2669  for ( ; j < (2*x); j++)
2670  graphic_context[n]->dash_pattern[j]=
2671  graphic_context[n]->dash_pattern[j-x];
2672  graphic_context[n]->dash_pattern[j]=0.0;
2673  break;
2674  }
2675  GetNextToken(q,&q,extent,token);
2676  break;
2677  }
2678  if (LocaleCompare("stroke-dashoffset",keyword) == 0)
2679  {
2680  GetNextToken(q,&q,extent,token);
2681  graphic_context[n]->dash_offset=StringToDouble(token,
2682  &next_token);
2683  if (token == next_token)
2684  status=MagickFalse;
2685  break;
2686  }
2687  if (LocaleCompare("stroke-linecap",keyword) == 0)
2688  {
2689  ssize_t
2690  linecap;
2691 
2692  GetNextToken(q,&q,extent,token);
2694  if (linecap == -1)
2695  status=MagickFalse;
2696  else
2697  graphic_context[n]->linecap=(LineCap) linecap;
2698  break;
2699  }
2700  if (LocaleCompare("stroke-linejoin",keyword) == 0)
2701  {
2702  ssize_t
2703  linejoin;
2704 
2705  GetNextToken(q,&q,extent,token);
2707  token);
2708  if (linejoin == -1)
2709  status=MagickFalse;
2710  else
2711  graphic_context[n]->linejoin=(LineJoin) linejoin;
2712  break;
2713  }
2714  if (LocaleCompare("stroke-miterlimit",keyword) == 0)
2715  {
2716  GetNextToken(q,&q,extent,token);
2717  graphic_context[n]->miterlimit=StringToUnsignedLong(token);
2718  break;
2719  }
2720  if (LocaleCompare("stroke-opacity",keyword) == 0)
2721  {
2722  GetNextToken(q,&q,extent,token);
2723  factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2724  graphic_context[n]->stroke_alpha=(double) QuantumRange*(1.0-factor*
2725  StringToDouble(token,&next_token));
2726  if (token == next_token)
2727  status=MagickFalse;
2728  break;
2729  }
2730  if (LocaleCompare("stroke-width",keyword) == 0)
2731  {
2732  GetNextToken(q,&q,extent,token);
2733  graphic_context[n]->stroke_width=StringToDouble(token,&next_token);
2734  if (token == next_token)
2735  status=MagickFalse;
2736  break;
2737  }
2738  status=MagickFalse;
2739  break;
2740  }
2741  case 't':
2742  case 'T':
2743  {
2744  if (LocaleCompare("text",keyword) == 0)
2745  {
2746  primitive_type=TextPrimitive;
2747  break;
2748  }
2749  if (LocaleCompare("text-align",keyword) == 0)
2750  {
2751  ssize_t
2752  align;
2753 
2754  GetNextToken(q,&q,extent,token);
2756  if (align == -1)
2757  status=MagickFalse;
2758  else
2759  graphic_context[n]->align=(AlignType) align;
2760  break;
2761  }
2762  if (LocaleCompare("text-anchor",keyword) == 0)
2763  {
2764  ssize_t
2765  align;
2766 
2767  GetNextToken(q,&q,extent,token);
2769  if (align == -1)
2770  status=MagickFalse;
2771  else
2772  graphic_context[n]->align=(AlignType) align;
2773  break;
2774  }
2775  if (LocaleCompare("text-antialias",keyword) == 0)
2776  {
2777  GetNextToken(q,&q,extent,token);
2778  graphic_context[n]->text_antialias=StringToLong(token) != 0 ?
2780  break;
2781  }
2782  if (LocaleCompare("text-undercolor",keyword) == 0)
2783  {
2784  GetNextToken(q,&q,extent,token);
2785  (void) QueryColorCompliance(token,AllCompliance,
2786  &graphic_context[n]->undercolor,exception);
2787  break;
2788  }
2789  if (LocaleCompare("translate",keyword) == 0)
2790  {
2791  GetNextToken(q,&q,extent,token);
2792  affine.tx=StringToDouble(token,&next_token);
2793  if (token == next_token)
2794  status=MagickFalse;
2795  GetNextToken(q,&q,extent,token);
2796  if (*token == ',')
2797  GetNextToken(q,&q,extent,token);
2798  affine.ty=StringToDouble(token,&next_token);
2799  if (token == next_token)
2800  status=MagickFalse;
2801  break;
2802  }
2803  status=MagickFalse;
2804  break;
2805  }
2806  case 'v':
2807  case 'V':
2808  {
2809  if (LocaleCompare("viewbox",keyword) == 0)
2810  {
2811  GetNextToken(q,&q,extent,token);
2812  graphic_context[n]->viewbox.x=(ssize_t) ceil(StringToDouble(token,
2813  &next_token)-0.5);
2814  if (token == next_token)
2815  status=MagickFalse;
2816  GetNextToken(q,&q,extent,token);
2817  if (*token == ',')
2818  GetNextToken(q,&q,extent,token);
2819  graphic_context[n]->viewbox.y=(ssize_t) ceil(StringToDouble(token,
2820  &next_token)-0.5);
2821  if (token == next_token)
2822  status=MagickFalse;
2823  GetNextToken(q,&q,extent,token);
2824  if (*token == ',')
2825  GetNextToken(q,&q,extent,token);
2826  graphic_context[n]->viewbox.width=(size_t) floor(StringToDouble(
2827  token,&next_token)+0.5);
2828  if (token == next_token)
2829  status=MagickFalse;
2830  GetNextToken(q,&q,extent,token);
2831  if (*token == ',')
2832  GetNextToken(q,&q,extent,token);
2833  graphic_context[n]->viewbox.height=(size_t) floor(StringToDouble(
2834  token,&next_token)+0.5);
2835  if (token == next_token)
2836  status=MagickFalse;
2837  break;
2838  }
2839  status=MagickFalse;
2840  break;
2841  }
2842  default:
2843  {
2844  status=MagickFalse;
2845  break;
2846  }
2847  }
2848  if (status == MagickFalse)
2849  break;
2850  if ((fabs(affine.sx-1.0) >= DrawEpsilon) ||
2851  (fabs(affine.rx) >= DrawEpsilon) || (fabs(affine.ry) >= DrawEpsilon) ||
2852  (fabs(affine.sy-1.0) >= DrawEpsilon) ||
2853  (fabs(affine.tx) >= DrawEpsilon) || (fabs(affine.ty) >= DrawEpsilon))
2854  {
2855  graphic_context[n]->affine.sx=current.sx*affine.sx+current.ry*affine.rx;
2856  graphic_context[n]->affine.rx=current.rx*affine.sx+current.sy*affine.rx;
2857  graphic_context[n]->affine.ry=current.sx*affine.ry+current.ry*affine.sy;
2858  graphic_context[n]->affine.sy=current.rx*affine.ry+current.sy*affine.sy;
2859  graphic_context[n]->affine.tx=current.sx*affine.tx+current.ry*affine.ty+
2860  current.tx;
2861  graphic_context[n]->affine.ty=current.rx*affine.tx+current.sy*affine.ty+
2862  current.ty;
2863  }
2864  if (primitive_type == UndefinedPrimitive)
2865  {
2866  if (*q == '\0')
2867  {
2868  if (number_stops > 1)
2869  {
2870  GradientType
2871  type;
2872 
2873  type=LinearGradient;
2874  if (draw_info->gradient.type == RadialGradient)
2875  type=RadialGradient;
2876  (void) GradientImage(image,type,PadSpread,stops,number_stops,
2877  exception);
2878  }
2879  if (number_stops > 0)
2880  stops=(StopInfo *) RelinquishMagickMemory(stops);
2881  }
2882  if (image->debug != MagickFalse)
2883  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int)
2884  (q-p),p);
2885  continue;
2886  }
2887  /*
2888  Parse the primitive attributes.
2889  */
2890  i=0;
2891  j=0;
2892  primitive_info[0].point.x=0.0;
2893  primitive_info[0].point.y=0.0;
2894  for (x=0; *q != '\0'; x++)
2895  {
2896  /*
2897  Define points.
2898  */
2899  if (IsPoint(q) == MagickFalse)
2900  break;
2901  GetNextToken(q,&q,extent,token);
2902  point.x=StringToDouble(token,&next_token);
2903  if (token == next_token)
2904  status=MagickFalse;
2905  GetNextToken(q,&q,extent,token);
2906  if (*token == ',')
2907  GetNextToken(q,&q,extent,token);
2908  point.y=StringToDouble(token,&next_token);
2909  if (token == next_token)
2910  status=MagickFalse;
2911  GetNextToken(q,(const char **) NULL,extent,token);
2912  if (*token == ',')
2913  GetNextToken(q,&q,extent,token);
2914  primitive_info[i].primitive=primitive_type;
2915  primitive_info[i].point=point;
2916  primitive_info[i].coordinates=0;
2917  primitive_info[i].method=FloodfillMethod;
2918  i++;
2919  if (i < (ssize_t) number_points)
2920  continue;
2921  number_points<<=1;
2922  primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(primitive_info,
2923  (size_t) number_points,sizeof(*primitive_info));
2924  if ((primitive_info == (PrimitiveInfo *) NULL) ||
2925  (number_points != (MagickSizeType) ((size_t) number_points)))
2926  {
2927  (void) ThrowMagickException(exception,GetMagickModule(),
2928  ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
2929  break;
2930  }
2931  }
2932  primitive_info[j].primitive=primitive_type;
2933  primitive_info[j].coordinates=(size_t) x;
2934  primitive_info[j].method=FloodfillMethod;
2935  primitive_info[j].text=(char *) NULL;
2936  /*
2937  Circumscribe primitive within a circle.
2938  */
2939  bounds.x1=primitive_info[j].point.x;
2940  bounds.y1=primitive_info[j].point.y;
2941  bounds.x2=primitive_info[j].point.x;
2942  bounds.y2=primitive_info[j].point.y;
2943  for (k=1; k < (ssize_t) primitive_info[j].coordinates; k++)
2944  {
2945  point=primitive_info[j+k].point;
2946  if (point.x < bounds.x1)
2947  bounds.x1=point.x;
2948  if (point.y < bounds.y1)
2949  bounds.y1=point.y;
2950  if (point.x > bounds.x2)
2951  bounds.x2=point.x;
2952  if (point.y > bounds.y2)
2953  bounds.y2=point.y;
2954  }
2955  /*
2956  Speculate how many points our primitive might consume.
2957  */
2958  length=primitive_info[j].coordinates;
2959  switch (primitive_type)
2960  {
2961  case RectanglePrimitive:
2962  {
2963  length*=5;
2964  break;
2965  }
2967  {
2968  double
2969  alpha,
2970  beta,
2971  radius;
2972 
2973  alpha=bounds.x2-bounds.x1;
2974  beta=bounds.y2-bounds.y1;
2975  radius=hypot((double) alpha,(double) beta);
2976  length*=5;
2977  length+=2*((size_t) ceil((double) MagickPI*radius))+6*BezierQuantum+360;
2978  break;
2979  }
2980  case BezierPrimitive:
2981  {
2982  if (primitive_info[j].coordinates > 107)
2983  (void) ThrowMagickException(exception,GetMagickModule(),DrawError,
2984  "TooManyBezierCoordinates","`%s'",token);
2985  length=BezierQuantum*primitive_info[j].coordinates;
2986  break;
2987  }
2988  case PathPrimitive:
2989  {
2990  char
2991  *s,
2992  *t;
2993 
2994  GetNextToken(q,&q,extent,token);
2995  length=1;
2996  t=token;
2997  for (s=token; *s != '\0'; s=t)
2998  {
2999  double
3000  value;
3001 
3002  value=StringToDouble(s,&t);
3003  (void) value;
3004  if (s == t)
3005  {
3006  t++;
3007  continue;
3008  }
3009  length++;
3010  }
3011  length=length*BezierQuantum;
3012  break;
3013  }
3014  case CirclePrimitive:
3015  case ArcPrimitive:
3016  case EllipsePrimitive:
3017  {
3018  double
3019  alpha,
3020  beta,
3021  radius;
3022 
3023  alpha=bounds.x2-bounds.x1;
3024  beta=bounds.y2-bounds.y1;
3025  radius=hypot((double) alpha,(double) beta);
3026  length=2*((size_t) ceil((double) MagickPI*radius))+6*BezierQuantum+360;
3027  break;
3028  }
3029  default:
3030  break;
3031  }
3032  if ((i+length) >= number_points)
3033  {
3034  /*
3035  Resize based on speculative points required by primitive.
3036  */
3037  number_points+=length+1;
3038  primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(primitive_info,
3039  (size_t) number_points,sizeof(*primitive_info));
3040  if ((primitive_info == (PrimitiveInfo *) NULL) ||
3041  (number_points != (MagickSizeType) ((size_t) number_points)))
3042  {
3043  (void) ThrowMagickException(exception,GetMagickModule(),
3044  ResourceLimitError,"MemoryAllocationFailed","`%s'",
3045  image->filename);
3046  break;
3047  }
3048  }
3049  switch (primitive_type)
3050  {
3051  case PointPrimitive:
3052  default:
3053  {
3054  if (primitive_info[j].coordinates != 1)
3055  {
3056  status=MagickFalse;
3057  break;
3058  }
3059  TracePoint(primitive_info+j,primitive_info[j].point);
3060  i=(ssize_t) (j+primitive_info[j].coordinates);
3061  break;
3062  }
3063  case LinePrimitive:
3064  {
3065  if (primitive_info[j].coordinates != 2)
3066  {
3067  status=MagickFalse;
3068  break;
3069  }
3070  TraceLine(primitive_info+j,primitive_info[j].point,
3071  primitive_info[j+1].point);
3072  i=(ssize_t) (j+primitive_info[j].coordinates);
3073  break;
3074  }
3075  case RectanglePrimitive:
3076  {
3077  if (primitive_info[j].coordinates != 2)
3078  {
3079  status=MagickFalse;
3080  break;
3081  }
3082  TraceRectangle(primitive_info+j,primitive_info[j].point,
3083  primitive_info[j+1].point);
3084  i=(ssize_t) (j+primitive_info[j].coordinates);
3085  break;
3086  }
3088  {
3089  if (primitive_info[j].coordinates != 3)
3090  {
3091  status=MagickFalse;
3092  break;
3093  }
3094  TraceRoundRectangle(primitive_info+j,primitive_info[j].point,
3095  primitive_info[j+1].point,primitive_info[j+2].point);
3096  i=(ssize_t) (j+primitive_info[j].coordinates);
3097  break;
3098  }
3099  case ArcPrimitive:
3100  {
3101  if (primitive_info[j].coordinates != 3)
3102  {
3103  primitive_type=UndefinedPrimitive;
3104  break;
3105  }
3106  TraceArc(primitive_info+j,primitive_info[j].point,
3107  primitive_info[j+1].point,primitive_info[j+2].point);
3108  i=(ssize_t) (j+primitive_info[j].coordinates);
3109  break;
3110  }
3111  case EllipsePrimitive:
3112  {
3113  if (primitive_info[j].coordinates != 3)
3114  {
3115  status=MagickFalse;
3116  break;
3117  }
3118  TraceEllipse(primitive_info+j,primitive_info[j].point,
3119  primitive_info[j+1].point,primitive_info[j+2].point);
3120  i=(ssize_t) (j+primitive_info[j].coordinates);
3121  break;
3122  }
3123  case CirclePrimitive:
3124  {
3125  if (primitive_info[j].coordinates != 2)
3126  {
3127  status=MagickFalse;
3128  break;
3129  }
3130  TraceCircle(primitive_info+j,primitive_info[j].point,
3131  primitive_info[j+1].point);
3132  i=(ssize_t) (j+primitive_info[j].coordinates);
3133  break;
3134  }
3135  case PolylinePrimitive:
3136  break;
3137  case PolygonPrimitive:
3138  {
3139  primitive_info[i]=primitive_info[j];
3140  primitive_info[i].coordinates=0;
3141  primitive_info[j].coordinates++;
3142  i++;
3143  break;
3144  }
3145  case BezierPrimitive:
3146  {
3147  if (primitive_info[j].coordinates < 3)
3148  {
3149  status=MagickFalse;
3150  break;
3151  }
3152  TraceBezier(primitive_info+j,primitive_info[j].coordinates);
3153  i=(ssize_t) (j+primitive_info[j].coordinates);
3154  break;
3155  }
3156  case PathPrimitive:
3157  {
3158  i=(ssize_t) (j+TracePath(primitive_info+j,token));
3159  break;
3160  }
3161  case AlphaPrimitive:
3162  case ColorPrimitive:
3163  {
3164  ssize_t
3165  method;
3166 
3167  if (primitive_info[j].coordinates != 1)
3168  {
3169  status=MagickFalse;
3170  break;
3171  }
3172  GetNextToken(q,&q,extent,token);
3174  if (method == -1)
3175  status=MagickFalse;
3176  else
3177  primitive_info[j].method=(PaintMethod) method;
3178  break;
3179  }
3180  case TextPrimitive:
3181  {
3182  if (primitive_info[j].coordinates != 1)
3183  {
3184  status=MagickFalse;
3185  break;
3186  }
3187  if (*token != ',')
3188  GetNextToken(q,&q,extent,token);
3189  primitive_info[j].text=AcquireString(token);
3190  break;
3191  }
3192  case ImagePrimitive:
3193  {
3194  if (primitive_info[j].coordinates != 2)
3195  {
3196  status=MagickFalse;
3197  break;
3198  }
3199  GetNextToken(q,&q,extent,token);
3200  primitive_info[j].text=AcquireString(token);
3201  break;
3202  }
3203  }
3204  if (primitive_info == (PrimitiveInfo *) NULL)
3205  break;
3206  if (image->debug != MagickFalse)
3207  (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int) (q-p),p);
3208  if (status == MagickFalse)
3209  break;
3210  primitive_info[i].primitive=UndefinedPrimitive;
3211  if (i == 0)
3212  continue;
3213  /*
3214  Transform points.
3215  */
3216  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
3217  {
3218  point=primitive_info[i].point;
3219  primitive_info[i].point.x=graphic_context[n]->affine.sx*point.x+
3220  graphic_context[n]->affine.ry*point.y+graphic_context[n]->affine.tx;
3221  primitive_info[i].point.y=graphic_context[n]->affine.rx*point.x+
3222  graphic_context[n]->affine.sy*point.y+graphic_context[n]->affine.ty;
3223  point=primitive_info[i].point;
3224  if (point.x < graphic_context[n]->bounds.x1)
3225  graphic_context[n]->bounds.x1=point.x;
3226  if (point.y < graphic_context[n]->bounds.y1)
3227  graphic_context[n]->bounds.y1=point.y;
3228  if (point.x > graphic_context[n]->bounds.x2)
3229  graphic_context[n]->bounds.x2=point.x;
3230  if (point.y > graphic_context[n]->bounds.y2)
3231  graphic_context[n]->bounds.y2=point.y;
3232  if (primitive_info[i].primitive == ImagePrimitive)
3233  break;
3234  if (i >= (ssize_t) number_points)
3235  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
3236  }
3237  if (graphic_context[n]->render != MagickFalse)
3238  {
3239  if ((n != 0) && (graphic_context[n]->clip_mask != (char *) NULL) &&
3240  (LocaleCompare(graphic_context[n]->clip_mask,
3241  graphic_context[n-1]->clip_mask) != 0))
3242  status&=DrawClipPath(image,graphic_context[n],
3243  graphic_context[n]->clip_mask,exception);
3244  status&=DrawPrimitive(image,graphic_context[n],primitive_info,
3245  exception);
3246  }
3247  if (primitive_info->text != (char *) NULL)
3248  primitive_info->text=(char *) RelinquishMagickMemory(
3249  primitive_info->text);
3250  proceed=SetImageProgress(image,RenderImageTag,q-primitive,(MagickSizeType)
3251  primitive_extent);
3252  if (proceed == MagickFalse)
3253  break;
3254  if (status == 0)
3255  break;
3256  }
3257  if (image->debug != MagickFalse)
3258  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end draw-image");
3259  /*
3260  Relinquish resources.
3261  */
3262  token=DestroyString(token);
3263  if (primitive_info != (PrimitiveInfo *) NULL)
3264  primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(primitive_info);
3265  primitive=DestroyString(primitive);
3266  for ( ; n >= 0; n--)
3267  graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
3268  graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
3269  if (status == MagickFalse)
3270  ThrowBinaryException(DrawError,"NonconformingDrawingPrimitiveDefinition",
3271  keyword);
3272  return(status != 0 ? MagickTrue : MagickFalse);
3273 }
3274 
3275 /*
3276 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3277 % %
3278 % %
3279 % %
3280 % D r a w G r a d i e n t I m a g e %
3281 % %
3282 % %
3283 % %
3284 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3285 %
3286 % DrawGradientImage() draws a linear gradient on the image.
3287 %
3288 % The format of the DrawGradientImage method is:
3289 %
3290 % MagickBooleanType DrawGradientImage(Image *image,
3291 % const DrawInfo *draw_info,ExceptionInfo *exception)
3292 %
3293 % A description of each parameter follows:
3294 %
3295 % o image: the image.
3296 %
3297 % o draw_info: the draw info.
3298 %
3299 % o exception: return any errors or warnings in this structure.
3300 %
3301 */
3302 
3303 static inline double GetStopColorOffset(const GradientInfo *gradient,
3304  const ssize_t x,const ssize_t y)
3305 {
3306  switch (gradient->type)
3307  {
3308  case UndefinedGradient:
3309  case LinearGradient:
3310  {
3311  double
3312  gamma,
3313  length,
3314  offset,
3315  scale;
3316 
3317  PointInfo
3318  p,
3319  q;
3320 
3321  const SegmentInfo
3322  *gradient_vector;
3323 
3324  gradient_vector=(&gradient->gradient_vector);
3325  p.x=gradient_vector->x2-gradient_vector->x1;
3326  p.y=gradient_vector->y2-gradient_vector->y1;
3327  q.x=(double) x-gradient_vector->x1;
3328  q.y=(double) y-gradient_vector->y1;
3329  length=sqrt(q.x*q.x+q.y*q.y);
3330  gamma=sqrt(p.x*p.x+p.y*p.y)*length;
3331  gamma=PerceptibleReciprocal(gamma);
3332  scale=p.x*q.x+p.y*q.y;
3333  offset=gamma*scale*length;
3334  return(offset);
3335  }
3336  case RadialGradient:
3337  {
3338  PointInfo
3339  v;
3340 
3341  if (gradient->spread == RepeatSpread)
3342  {
3343  v.x=(double) x-gradient->center.x;
3344  v.y=(double) y-gradient->center.y;
3345  return(sqrt(v.x*v.x+v.y*v.y));
3346  }
3347  v.x=(double) (((x-gradient->center.x)*cos(DegreesToRadians(
3348  gradient->angle)))+((y-gradient->center.y)*sin(DegreesToRadians(
3349  gradient->angle))))/gradient->radii.x;
3350  v.y=(double) (((x-gradient->center.x)*sin(DegreesToRadians(
3351  gradient->angle)))-((y-gradient->center.y)*cos(DegreesToRadians(
3352  gradient->angle))))/gradient->radii.y;
3353  return(sqrt(v.x*v.x+v.y*v.y));
3354  }
3355  }
3356  return(0.0);
3357 }
3358 
3359 static int StopInfoCompare(const void *x,const void *y)
3360 {
3361  StopInfo
3362  *stop_1,
3363  *stop_2;
3364 
3365  stop_1=(StopInfo *) x;
3366  stop_2=(StopInfo *) y;
3367  if (stop_1->offset > stop_2->offset)
3368  return(1);
3369  if (fabs(stop_1->offset-stop_2->offset) <= DrawEpsilon)
3370  return(0);
3371  return(-1);
3372 }
3373 
3375  const DrawInfo *draw_info,ExceptionInfo *exception)
3376 {
3377  CacheView
3378  *image_view;
3379 
3380  const GradientInfo
3381  *gradient;
3382 
3383  const SegmentInfo
3384  *gradient_vector;
3385 
3386  double
3387  length;
3388 
3390  status;
3391 
3392  PixelInfo
3393  zero;
3394 
3395  PointInfo
3396  point;
3397 
3399  bounding_box;
3400 
3401  ssize_t
3402  y;
3403 
3404  /*
3405  Draw linear or radial gradient on image.
3406  */
3407  assert(image != (Image *) NULL);
3408  assert(image->signature == MagickCoreSignature);
3409  if (image->debug != MagickFalse)
3410  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3411  assert(draw_info != (const DrawInfo *) NULL);
3412  gradient=(&draw_info->gradient);
3413  qsort(gradient->stops,gradient->number_stops,sizeof(StopInfo),
3414  StopInfoCompare);
3415  gradient_vector=(&gradient->gradient_vector);
3416  point.x=gradient_vector->x2-gradient_vector->x1;
3417  point.y=gradient_vector->y2-gradient_vector->y1;
3418  length=sqrt(point.x*point.x+point.y*point.y);
3419  bounding_box=gradient->bounding_box;
3420  status=MagickTrue;
3421  GetPixelInfo(image,&zero);
3422  image_view=AcquireAuthenticCacheView(image,exception);
3423 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3424  #pragma omp parallel for schedule(static,4) shared(status) \
3425  magick_threads(image,image,1,1)
3426 #endif
3427  for (y=bounding_box.y; y < (ssize_t) bounding_box.height; y++)
3428  {
3429  PixelInfo
3430  composite,
3431  pixel;
3432 
3433  double
3434  alpha,
3435  offset;
3436 
3437  register Quantum
3438  *magick_restrict q;
3439 
3440  register ssize_t
3441  i,
3442  x;
3443 
3444  ssize_t
3445  j;
3446 
3447  if (status == MagickFalse)
3448  continue;
3449  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
3450  if (q == (Quantum *) NULL)
3451  {
3452  status=MagickFalse;
3453  continue;
3454  }
3455  pixel=zero;
3456  composite=zero;
3457  offset=GetStopColorOffset(gradient,0,y);
3458  if (gradient->type != RadialGradient)
3459  offset/=length;
3460  for (x=bounding_box.x; x < (ssize_t) bounding_box.width; x++)
3461  {
3462  GetPixelInfoPixel(image,q,&pixel);
3463  switch (gradient->spread)
3464  {
3465  case UndefinedSpread:
3466  case PadSpread:
3467  {
3468  if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3469  (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3470  {
3471  offset=GetStopColorOffset(gradient,x,y);
3472  if (gradient->type != RadialGradient)
3473  offset/=length;
3474  }
3475  for (i=0; i < (ssize_t) gradient->number_stops; i++)
3476  if (offset < gradient->stops[i].offset)
3477  break;
3478  if ((offset < 0.0) || (i == 0))
3479  composite=gradient->stops[0].color;
3480  else
3481  if ((offset > 1.0) || (i == (ssize_t) gradient->number_stops))
3482  composite=gradient->stops[gradient->number_stops-1].color;
3483  else
3484  {
3485  j=i;
3486  i--;
3487  alpha=(offset-gradient->stops[i].offset)/
3488  (gradient->stops[j].offset-gradient->stops[i].offset);
3489  CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
3490  &gradient->stops[j].color,alpha,&composite);
3491  }
3492  break;
3493  }
3494  case ReflectSpread:
3495  {
3496  if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3497  (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3498  {
3499  offset=GetStopColorOffset(gradient,x,y);
3500  if (gradient->type != RadialGradient)
3501  offset/=length;
3502  }
3503  if (offset < 0.0)
3504  offset=(-offset);
3505  if ((ssize_t) fmod(offset,2.0) == 0)
3506  offset=fmod(offset,1.0);
3507  else
3508  offset=1.0-fmod(offset,1.0);
3509  for (i=0; i < (ssize_t) gradient->number_stops; i++)
3510  if (offset < gradient->stops[i].offset)
3511  break;
3512  if (i == 0)
3513  composite=gradient->stops[0].color;
3514  else
3515  if (i == (ssize_t) gradient->number_stops)
3516  composite=gradient->stops[gradient->number_stops-1].color;
3517  else
3518  {
3519  j=i;
3520  i--;
3521  alpha=(offset-gradient->stops[i].offset)/
3522  (gradient->stops[j].offset-gradient->stops[i].offset);
3523  CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
3524  &gradient->stops[j].color,alpha,&composite);
3525  }
3526  break;
3527  }
3528  case RepeatSpread:
3529  {
3531  antialias;
3532 
3533  double
3534  repeat;
3535 
3536  antialias=MagickFalse;
3537  repeat=0.0;
3538  if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3539  (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3540  {
3541  offset=GetStopColorOffset(gradient,x,y);
3542  if (gradient->type == LinearGradient)
3543  {
3544  repeat=fmod(offset,length);
3545  if (repeat < 0.0)
3546  repeat=length-fmod(-repeat,length);
3547  else
3548  repeat=fmod(offset,length);
3549  antialias=(repeat < length) && ((repeat+1.0) > length) ?
3551  offset=repeat/length;
3552  }
3553  else
3554  {
3555  repeat=fmod(offset,gradient->radius);
3556  if (repeat < 0.0)
3557  repeat=gradient->radius-fmod(-repeat,gradient->radius);
3558  else
3559  repeat=fmod(offset,gradient->radius);
3560  antialias=repeat+1.0 > gradient->radius ? MagickTrue :
3561  MagickFalse;
3562  offset=repeat/gradient->radius;
3563  }
3564  }
3565  for (i=0; i < (ssize_t) gradient->number_stops; i++)
3566  if (offset < gradient->stops[i].offset)
3567  break;
3568  if (i == 0)
3569  composite=gradient->stops[0].color;
3570  else
3571  if (i == (ssize_t) gradient->number_stops)
3572  composite=gradient->stops[gradient->number_stops-1].color;
3573  else
3574  {
3575  j=i;
3576  i--;
3577  alpha=(offset-gradient->stops[i].offset)/
3578  (gradient->stops[j].offset-gradient->stops[i].offset);
3579  if (antialias != MagickFalse)
3580  {
3581  if (gradient->type == LinearGradient)
3582  alpha=length-repeat;
3583  else
3584  alpha=gradient->radius-repeat;
3585  i=0;
3586  j=(ssize_t) gradient->number_stops-1L;
3587  }
3588  CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
3589  &gradient->stops[j].color,alpha,&composite);
3590  }
3591  break;
3592  }
3593  }
3594  CompositePixelInfoOver(&composite,composite.alpha,&pixel,pixel.alpha,
3595  &pixel);
3596  SetPixelViaPixelInfo(image,&pixel,q);
3597  q+=GetPixelChannels(image);
3598  }
3599  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
3600  status=MagickFalse;
3601  }
3602  image_view=DestroyCacheView(image_view);
3603  return(status);
3604 }
3605 
3606 /*
3607 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3608 % %
3609 % %
3610 % %
3611 % D r a w P a t t e r n P a t h %
3612 % %
3613 % %
3614 % %
3615 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3616 %
3617 % DrawPatternPath() draws a pattern.
3618 %
3619 % The format of the DrawPatternPath method is:
3620 %
3621 % MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
3622 % const char *name,Image **pattern,ExceptionInfo *exception)
3623 %
3624 % A description of each parameter follows:
3625 %
3626 % o image: the image.
3627 %
3628 % o draw_info: the draw info.
3629 %
3630 % o name: the pattern name.
3631 %
3632 % o image: the image.
3633 %
3634 % o exception: return any errors or warnings in this structure.
3635 %
3636 */
3638  const DrawInfo *draw_info,const char *name,Image **pattern,
3639  ExceptionInfo *exception)
3640 {
3641  char
3642  property[MagickPathExtent];
3643 
3644  const char
3645  *geometry,
3646  *path,
3647  *type;
3648 
3649  DrawInfo
3650  *clone_info;
3651 
3652  ImageInfo
3653  *image_info;
3654 
3656  status;
3657 
3658  assert(image != (Image *) NULL);
3659  assert(image->signature == MagickCoreSignature);
3660  if (image->debug != MagickFalse)
3661  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3662  assert(draw_info != (const DrawInfo *) NULL);
3663  assert(name != (const char *) NULL);
3664  (void) FormatLocaleString(property,MagickPathExtent,"%s",name);
3665  path=GetImageArtifact(image,property);
3666  if (path == (const char *) NULL)
3667  return(MagickFalse);
3668  (void) FormatLocaleString(property,MagickPathExtent,"%s-geometry",name);
3669  geometry=GetImageArtifact(image,property);
3670  if (geometry == (const char *) NULL)
3671  return(MagickFalse);
3672  if ((*pattern) != (Image *) NULL)
3673  *pattern=DestroyImage(*pattern);
3674  image_info=AcquireImageInfo();
3675  image_info->size=AcquireString(geometry);
3676  *pattern=AcquireImage(image_info,exception);
3677  image_info=DestroyImageInfo(image_info);
3678  (void) QueryColorCompliance("#000000ff",AllCompliance,
3679  &(*pattern)->background_color,exception);
3680  (void) SetImageBackgroundColor(*pattern,exception);
3681  if (image->debug != MagickFalse)
3683  "begin pattern-path %s %s",name,geometry);
3684  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
3685  clone_info->fill_pattern=NewImageList();
3686  clone_info->stroke_pattern=NewImageList();
3687  (void) FormatLocaleString(property,MagickPathExtent,"%s-type",name);
3688  type=GetImageArtifact(image,property);
3689  if (type != (const char *) NULL)
3692  (void) CloneString(&clone_info->primitive,path);
3693  status=DrawImage(*pattern,clone_info,exception);
3694  clone_info=DestroyDrawInfo(clone_info);
3695  if (image->debug != MagickFalse)
3696  (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end pattern-path");
3697  return(status);
3698 }
3699 
3700 /*
3701 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3702 % %
3703 % %
3704 % %
3705 + D r a w P o l y g o n P r i m i t i v e %
3706 % %
3707 % %
3708 % %
3709 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3710 %
3711 % DrawPolygonPrimitive() draws a polygon on the image.
3712 %
3713 % The format of the DrawPolygonPrimitive method is:
3714 %
3715 % MagickBooleanType DrawPolygonPrimitive(Image *image,
3716 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
3717 % ExceptionInfo *exception)
3718 %
3719 % A description of each parameter follows:
3720 %
3721 % o image: the image.
3722 %
3723 % o draw_info: the draw info.
3724 %
3725 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
3726 %
3727 % o exception: return any errors or warnings in this structure.
3728 %
3729 */
3730 
3732 {
3733  register ssize_t
3734  i;
3735 
3736  assert(polygon_info != (PolygonInfo **) NULL);
3737  for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
3738  if (polygon_info[i] != (PolygonInfo *) NULL)
3739  polygon_info[i]=DestroyPolygonInfo(polygon_info[i]);
3740  polygon_info=(PolygonInfo **) RelinquishMagickMemory(polygon_info);
3741  return(polygon_info);
3742 }
3743 
3745  const PrimitiveInfo *primitive_info)
3746 {
3747  PathInfo
3748  *magick_restrict path_info;
3749 
3750  PolygonInfo
3751  **polygon_info;
3752 
3753  register ssize_t
3754  i;
3755 
3756  size_t
3757  number_threads;
3758 
3759  number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
3760  polygon_info=(PolygonInfo **) AcquireQuantumMemory(number_threads,
3761  sizeof(*polygon_info));
3762  if (polygon_info == (PolygonInfo **) NULL)
3763  return((PolygonInfo **) NULL);
3764  (void) ResetMagickMemory(polygon_info,0,number_threads*sizeof(*polygon_info));
3765  path_info=ConvertPrimitiveToPath(primitive_info);
3766  if (path_info == (PathInfo *) NULL)
3767  return(DestroyPolygonThreadSet(polygon_info));
3768  for (i=0; i < (ssize_t) number_threads; i++)
3769  {
3770  polygon_info[i]=ConvertPathToPolygon(path_info);
3771  if (polygon_info[i] == (PolygonInfo *) NULL)
3772  return(DestroyPolygonThreadSet(polygon_info));
3773  }
3774  path_info=(PathInfo *) RelinquishMagickMemory(path_info);
3775  return(polygon_info);
3776 }
3777 
3778 static double GetFillAlpha(PolygonInfo *polygon_info,const double mid,
3779  const MagickBooleanType fill,const FillRule fill_rule,const ssize_t x,
3780  const ssize_t y,double *stroke_alpha)
3781 {
3782  double
3783  alpha,
3784  beta,
3785  distance,
3786  subpath_alpha;
3787 
3788  PointInfo
3789  delta;
3790 
3791  register const PointInfo
3792  *q;
3793 
3794  register EdgeInfo
3795  *p;
3796 
3797  register ssize_t
3798  i;
3799 
3800  ssize_t
3801  j,
3802  winding_number;
3803 
3804  /*
3805  Compute fill & stroke opacity for this (x,y) point.
3806  */
3807  *stroke_alpha=0.0;
3808  subpath_alpha=0.0;
3809  p=polygon_info->edges;
3810  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
3811  {
3812  if ((double) y <= (p->bounds.y1-mid-0.5))
3813  break;
3814  if ((double) y > (p->bounds.y2+mid+0.5))
3815  {
3816  (void) DestroyEdge(polygon_info,(size_t) j);
3817  continue;
3818  }
3819  if (((double) x <= (p->bounds.x1-mid-0.5)) ||
3820  ((double) x > (p->bounds.x2+mid+0.5)))
3821  continue;
3822  i=(ssize_t) MagickMax((double) p->highwater,1.0);
3823  for ( ; i < (ssize_t) p->number_points; i++)
3824  {
3825  if ((double) y <= (p->points[i-1].y-mid-0.5))
3826  break;
3827  if ((double) y > (p->points[i].y+mid+0.5))
3828  continue;
3829  if (p->scanline != (double) y)
3830  {
3831  p->scanline=(double) y;
3832  p->highwater=(size_t) i;
3833  }
3834  /*
3835  Compute distance between a point and an edge.
3836  */
3837  q=p->points+i-1;
3838  delta.x=(q+1)->x-q->x;
3839  delta.y=(q+1)->y-q->y;
3840  beta=delta.x*(x-q->x)+delta.y*(y-q->y);
3841  if (beta < 0.0)
3842  {
3843  delta.x=(double) x-q->x;
3844  delta.y=(double) y-q->y;
3845  distance=delta.x*delta.x+delta.y*delta.y;
3846  }
3847  else
3848  {
3849  alpha=delta.x*delta.x+delta.y*delta.y;
3850  if (beta > alpha)
3851  {
3852  delta.x=(double) x-(q+1)->x;
3853  delta.y=(double) y-(q+1)->y;
3854  distance=delta.x*delta.x+delta.y*delta.y;
3855  }
3856  else
3857  {
3858  alpha=1.0/alpha;
3859  beta=delta.x*(y-q->y)-delta.y*(x-q->x);
3860  distance=alpha*beta*beta;
3861  }
3862  }
3863  /*
3864  Compute stroke & subpath opacity.
3865  */
3866  beta=0.0;
3867  if (p->ghostline == MagickFalse)
3868  {
3869  alpha=mid+0.5;
3870  if ((*stroke_alpha < 1.0) &&
3871  (distance <= ((alpha+0.25)*(alpha+0.25))))
3872  {
3873  alpha=mid-0.5;
3874  if (distance <= ((alpha+0.25)*(alpha+0.25)))
3875  *stroke_alpha=1.0;
3876  else
3877  {
3878  beta=1.0;
3879  if (fabs(distance-1.0) >= DrawEpsilon)
3880  beta=sqrt((double) distance);
3881  alpha=beta-mid-0.5;
3882  if (*stroke_alpha < ((alpha-0.25)*(alpha-0.25)))
3883  *stroke_alpha=(alpha-0.25)*(alpha-0.25);
3884  }
3885  }
3886  }
3887  if ((fill == MagickFalse) || (distance > 1.0) || (subpath_alpha >= 1.0))
3888  continue;
3889  if (distance <= 0.0)
3890  {
3891  subpath_alpha=1.0;
3892  continue;
3893  }
3894  if (distance > 1.0)
3895  continue;
3896  if (fabs(beta) < DrawEpsilon)
3897  {
3898  beta=1.0;
3899  if (fabs(distance-1.0) >= DrawEpsilon)
3900  beta=sqrt(distance);
3901  }
3902  alpha=beta-1.0;
3903  if (subpath_alpha < (alpha*alpha))
3904  subpath_alpha=alpha*alpha;
3905  }
3906  }
3907  /*
3908  Compute fill opacity.
3909  */
3910  if (fill == MagickFalse)
3911  return(0.0);
3912  if (subpath_alpha >= 1.0)
3913  return(1.0);
3914  /*
3915  Determine winding number.
3916  */
3917  winding_number=0;
3918  p=polygon_info->edges;
3919  for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
3920  {
3921  if ((double) y <= p->bounds.y1)
3922  break;
3923  if (((double) y > p->bounds.y2) || ((double) x <= p->bounds.x1))
3924  continue;
3925  if ((double) x > p->bounds.x2)
3926  {
3927  winding_number+=p->direction ? 1 : -1;
3928  continue;
3929  }
3930  i=(ssize_t) MagickMax((double) p->highwater,1.0);
3931  for ( ; i < (ssize_t) p->number_points; i++)
3932  if ((double) y <= p->points[i].y)
3933  break;
3934  q=p->points+i-1;
3935  if ((((q+1)->x-q->x)*(y-q->y)) <= (((q+1)->y-q->y)*(x-q->x)))
3936  winding_number+=p->direction ? 1 : -1;
3937  }
3938  if (fill_rule != NonZeroRule)
3939  {
3940  if ((MagickAbsoluteValue(winding_number) & 0x01) != 0)
3941  return(1.0);
3942  }
3943  else
3944  if (MagickAbsoluteValue(winding_number) != 0)
3945  return(1.0);
3946  return(subpath_alpha);
3947 }
3948 
3950  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
3951  ExceptionInfo *exception)
3952 {
3953  CacheView
3954  *image_view;
3955 
3957  fill,
3958  status;
3959 
3960  double
3961  mid;
3962 
3963  PolygonInfo
3964  **magick_restrict polygon_info;
3965 
3966  register EdgeInfo
3967  *p;
3968 
3969  register ssize_t
3970  i;
3971 
3972  SegmentInfo
3973  bounds;
3974 
3975  ssize_t
3976  start_y,
3977  stop_y,
3978  y;
3979 
3980  /*
3981  Compute bounding box.
3982  */
3983  assert(image != (Image *) NULL);
3984  assert(image->signature == MagickCoreSignature);
3985  if (image->debug != MagickFalse)
3986  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3987  assert(draw_info != (DrawInfo *) NULL);
3988  assert(draw_info->signature == MagickCoreSignature);
3989  assert(primitive_info != (PrimitiveInfo *) NULL);
3990  if (primitive_info->coordinates == 0)
3991  return(MagickTrue);
3992  polygon_info=AcquirePolygonThreadSet(primitive_info);
3993  if (polygon_info == (PolygonInfo **) NULL)
3994  return(MagickFalse);
3995 DisableMSCWarning(4127)
3996  if (0)
3997  DrawBoundingRectangles(image,draw_info,polygon_info[0],exception);
3999  if (image->debug != MagickFalse)
4000  (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-polygon");
4001  fill=(primitive_info->method == FillToBorderMethod) ||
4002  (primitive_info->method == FloodfillMethod) ? MagickTrue : MagickFalse;
4003  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
4004  bounds=polygon_info[0]->edges[0].bounds;
4005  for (i=1; i < (ssize_t) polygon_info[0]->number_edges; i++)
4006  {
4007  p=polygon_info[0]->edges+i;
4008  if (p->bounds.x1 < bounds.x1)
4009  bounds.x1=p->bounds.x1;
4010  if (p->bounds.y1 < bounds.y1)
4011  bounds.y1=p->bounds.y1;
4012  if (p->bounds.x2 > bounds.x2)
4013  bounds.x2=p->bounds.x2;
4014  if (p->bounds.y2 > bounds.y2)
4015  bounds.y2=p->bounds.y2;
4016  }
4017  bounds.x1-=(mid+1.0);
4018  bounds.x1=bounds.x1 < 0.0 ? 0.0 : (size_t) ceil(bounds.x1-0.5) >=
4019  image->columns ? (double) image->columns-1 : bounds.x1;
4020  bounds.y1-=(mid+1.0);
4021  bounds.y1=bounds.y1 < 0.0 ? 0.0 : (size_t) ceil(bounds.y1-0.5) >=
4022  image->rows ? (double) image->rows-1 : bounds.y1;
4023  bounds.x2+=(mid+1.0);
4024  bounds.x2=bounds.x2 < 0.0 ? 0.0 : (size_t) floor(bounds.x2+0.5) >=
4025  image->columns ? (double) image->columns-1 : bounds.x2;
4026  bounds.y2+=(mid+1.0);
4027  bounds.y2=bounds.y2 < 0.0 ? 0.0 : (size_t) floor(bounds.y2+0.5) >=
4028  image->rows ? (double) image->rows-1 : bounds.y2;
4029  status=MagickTrue;
4030  image_view=AcquireAuthenticCacheView(image,exception);
4031  if ((primitive_info->coordinates == 1) ||
4032  (polygon_info[0]->number_edges == 0))
4033  {
4034  /*
4035  Draw point.
4036  */
4037  start_y=(ssize_t) ceil(bounds.y1-0.5);
4038  stop_y=(ssize_t) floor(bounds.y2+0.5);
4039 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4040  #pragma omp parallel for schedule(static,4) shared(status) \
4041  magick_threads(image,image,1,1)
4042 #endif
4043  for (y=start_y; y <= stop_y; y++)
4044  {
4046  sync;
4047 
4048  PixelInfo
4049  pixel;
4050 
4051  register ssize_t
4052  x;
4053 
4054  register Quantum
4055  *magick_restrict q;
4056 
4057  ssize_t
4058  start_x,
4059  stop_x;
4060 
4061  if (status == MagickFalse)
4062  continue;
4063  start_x=(ssize_t) ceil(bounds.x1-0.5);
4064  stop_x=(ssize_t) floor(bounds.x2+0.5);
4065  x=start_x;
4066  q=GetCacheViewAuthenticPixels(image_view,x,y,(size_t) (stop_x-x+1),1,
4067  exception);
4068  if (q == (Quantum *) NULL)
4069  {
4070  status=MagickFalse;
4071  continue;
4072  }
4073  GetPixelInfo(image,&pixel);
4074  for ( ; x <= stop_x; x++)
4075  {
4076  if ((x == (ssize_t) ceil(primitive_info->point.x-0.5)) &&
4077  (y == (ssize_t) ceil(primitive_info->point.y-0.5)))
4078  {
4079  GetFillColor(draw_info,x-start_x,y-start_y,&pixel,exception);
4080  SetPixelViaPixelInfo(image,&pixel,q);
4081  }
4082  q+=GetPixelChannels(image);
4083  }
4084  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4085  if (sync == MagickFalse)
4086  status=MagickFalse;
4087  }
4088  image_view=DestroyCacheView(image_view);
4089  polygon_info=DestroyPolygonThreadSet(polygon_info);
4090  if (image->debug != MagickFalse)
4092  " end draw-polygon");
4093  return(status);
4094  }
4095  /*
4096  Draw polygon or line.
4097  */
4098  if (image->alpha_trait == UndefinedPixelTrait)
4099  (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
4100  start_y=(ssize_t) ceil(bounds.y1-0.5);
4101  stop_y=(ssize_t) floor(bounds.y2+0.5);
4102 #if defined(MAGICKCORE_OPENMP_SUPPORT)
4103  #pragma omp parallel for schedule(static,4) shared(status) \
4104  magick_threads(image,image,1,1)
4105 #endif
4106  for (y=start_y; y <= stop_y; y++)
4107  {
4108  const int
4109  id = GetOpenMPThreadId();
4110 
4111  double
4112  fill_alpha,
4113  stroke_alpha;
4114 
4115  PixelInfo
4116  fill_color,
4117  stroke_color;
4118 
4119  register Quantum
4120  *magick_restrict q;
4121 
4122  register ssize_t
4123  x;
4124 
4125  ssize_t
4126  start_x,
4127  stop_x;
4128 
4129  if (status == MagickFalse)
4130  continue;
4131  start_x=(ssize_t) ceil(bounds.x1-0.5);
4132  stop_x=(ssize_t) floor(bounds.x2+0.5);
4133  q=GetCacheViewAuthenticPixels(image_view,start_x,y,(size_t) (stop_x-start_x+1),1,
4134  exception);
4135  if (q == (Quantum *) NULL)
4136  {
4137  status=MagickFalse;
4138  continue;
4139  }
4140  for (x=start_x; x <= stop_x; x++)
4141  {
4142  /*
4143  Fill and/or stroke.
4144  */
4145  fill_alpha=GetFillAlpha(polygon_info[id],mid,fill,draw_info->fill_rule,
4146  x,y,&stroke_alpha);
4147  if (draw_info->stroke_antialias == MagickFalse)
4148  {
4149  fill_alpha=fill_alpha > 0.25 ? 1.0 : 0.0;
4150  stroke_alpha=stroke_alpha > 0.25 ? 1.0 : 0.0;
4151  }
4152  GetFillColor(draw_info,x-start_x,y-start_y,&fill_color,exception);
4153  fill_alpha=fill_alpha*fill_color.alpha;
4154  CompositePixelOver(image,&fill_color,fill_alpha,q,(double)
4155  GetPixelAlpha(image,q),q);
4156  GetStrokeColor(draw_info,x-start_x,y-start_y,&stroke_color,exception);
4157  stroke_alpha=stroke_alpha*stroke_color.alpha;
4158  CompositePixelOver(image,&stroke_color,stroke_alpha,q,(double)
4159  GetPixelAlpha(image,q),q);
4160  q+=GetPixelChannels(image);
4161  }
4162  if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
4163  status=MagickFalse;
4164  }
4165  image_view=DestroyCacheView(image_view);
4166  polygon_info=DestroyPolygonThreadSet(polygon_info);
4167  if (image->debug != MagickFalse)
4168  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-polygon");
4169  return(status);
4170 }
4171 
4172 /*
4173 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4174 % %
4175 % %
4176 % %
4177 % D r a w P r i m i t i v e %
4178 % %
4179 % %
4180 % %
4181 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4182 %
4183 % DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.
4184 %
4185 % The format of the DrawPrimitive method is:
4186 %
4187 % MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
4188 % PrimitiveInfo *primitive_info,ExceptionInfo *exception)
4189 %
4190 % A description of each parameter follows:
4191 %
4192 % o image: the image.
4193 %
4194 % o draw_info: the draw info.
4195 %
4196 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4197 %
4198 % o exception: return any errors or warnings in this structure.
4199 %
4200 */
4201 
4202 static void LogPrimitiveInfo(const PrimitiveInfo *primitive_info)
4203 {
4204  const char
4205  *methods[] =
4206  {
4207  "point",
4208  "replace",
4209  "floodfill",
4210  "filltoborder",
4211  "reset",
4212  "?"
4213  };
4214 
4215  PointInfo
4216  p,
4217  q,
4218  point;
4219 
4220  register ssize_t
4221  i,
4222  x;
4223 
4224  ssize_t
4225  coordinates,
4226  y;
4227 
4228  x=(ssize_t) ceil(primitive_info->point.x-0.5);
4229  y=(ssize_t) ceil(primitive_info->point.y-0.5);
4230  switch (primitive_info->primitive)
4231  {
4232  case AlphaPrimitive:
4233  {
4235  "AlphaPrimitive %.20g,%.20g %s",(double) x,(double) y,
4236  methods[primitive_info->method]);
4237  return;
4238  }
4239  case ColorPrimitive:
4240  {
4242  "ColorPrimitive %.20g,%.20g %s",(double) x,(double) y,
4243  methods[primitive_info->method]);
4244  return;
4245  }
4246  case ImagePrimitive:
4247  {
4249  "ImagePrimitive %.20g,%.20g",(double) x,(double) y);
4250  return;
4251  }
4252  case PointPrimitive:
4253  {
4255  "PointPrimitive %.20g,%.20g %s",(double) x,(double) y,
4256  methods[primitive_info->method]);
4257  return;
4258  }
4259  case TextPrimitive:
4260  {
4262  "TextPrimitive %.20g,%.20g",(double) x,(double) y);
4263  return;
4264  }
4265  default:
4266  break;
4267  }
4268  coordinates=0;
4269  p=primitive_info[0].point;
4270  q.x=(-1.0);
4271  q.y=(-1.0);
4272  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4273  {
4274  point=primitive_info[i].point;
4275  if (coordinates <= 0)
4276  {
4277  coordinates=(ssize_t) primitive_info[i].coordinates;
4279  " begin open (%.20g)",(double) coordinates);
4280  p=point;
4281  }
4282  point=primitive_info[i].point;
4283  if ((fabs(q.x-point.x) >= DrawEpsilon) ||
4284  (fabs(q.y-point.y) >= DrawEpsilon))
4286  " %.20g: %.18g,%.18g",(double) coordinates,point.x,point.y);
4287  else
4289  " %.20g: %g %g (duplicate)",(double) coordinates,point.x,point.y);
4290  q=point;
4291  coordinates--;
4292  if (coordinates > 0)
4293  continue;
4294  if ((fabs(p.x-point.x) >= DrawEpsilon) ||
4295  (fabs(p.y-point.y) >= DrawEpsilon))
4296  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end last (%.20g)",
4297  (double) coordinates);
4298  else
4299  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end open (%.20g)",
4300  (double) coordinates);
4301  }
4302 }
4303 
4305  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
4306  ExceptionInfo *exception)
4307 {
4308  CacheView
4309  *image_view;
4310 
4312  status;
4313 
4314  register ssize_t
4315  i,
4316  x;
4317 
4318  ssize_t
4319  y;
4320 
4321  if (image->debug != MagickFalse)
4322  {
4324  " begin draw-primitive");
4326  " affine: %g,%g,%g,%g,%g,%g",draw_info->affine.sx,
4327  draw_info->affine.rx,draw_info->affine.ry,draw_info->affine.sy,
4328  draw_info->affine.tx,draw_info->affine.ty);
4329  }
4330  if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
4331  ((IsPixelInfoGray(&draw_info->fill) == MagickFalse) ||
4332  (IsPixelInfoGray(&draw_info->stroke) == MagickFalse)))
4333  (void) SetImageColorspace(image,sRGBColorspace,exception);
4334  status=MagickTrue;
4335  x=(ssize_t) ceil(primitive_info->point.x-0.5);
4336  y=(ssize_t) ceil(primitive_info->point.y-0.5);
4337  image_view=AcquireAuthenticCacheView(image,exception);
4338  switch (primitive_info->primitive)
4339  {
4340  case AlphaPrimitive:
4341  {
4342  if (image->alpha_trait == UndefinedPixelTrait)
4343  (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
4344  switch (primitive_info->method)
4345  {
4346  case PointMethod:
4347  default:
4348  {
4349  PixelInfo
4350  pixel;
4351 
4352  register Quantum
4353  *q;
4354 
4355  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4356  if (q == (Quantum *) NULL)
4357  break;
4358  GetFillColor(draw_info,x,y,&pixel,exception);
4359  SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
4360  (void) SyncCacheViewAuthenticPixels(image_view,exception);
4361  break;
4362  }
4363  case ReplaceMethod:
4364  {
4366  sync;
4367 
4368  PixelInfo
4369  pixel,
4370  target;
4371 
4372  (void) GetOneCacheViewVirtualPixelInfo(image_view,x,y,&target,
4373  exception);
4374  GetPixelInfo(image,&pixel);
4375  for (y=0; y < (ssize_t) image->rows; y++)
4376  {
4377  register Quantum
4378  *magick_restrict q;
4379 
4380  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4381  exception);
4382  if (q == (Quantum *) NULL)
4383  break;
4384  for (x=0; x < (ssize_t) image->columns; x++)
4385  {
4386  GetPixelInfoPixel(image,q,&pixel);
4387  if (IsFuzzyEquivalencePixelInfo(&pixel,&target) == MagickFalse)
4388  {
4389  q+=GetPixelChannels(image);
4390  continue;
4391  }
4392  GetFillColor(draw_info,x,y,&pixel,exception);
4393  SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
4394  q+=GetPixelChannels(image);
4395  }
4396  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4397  if (sync == MagickFalse)
4398  break;
4399  }
4400  break;
4401  }
4402  case FloodfillMethod:
4403  case FillToBorderMethod:
4404  {
4405  ChannelType
4406  channel_mask;
4407 
4408  PixelInfo
4409  target;
4410 
4412  &target,exception);
4413  if (primitive_info->method == FillToBorderMethod)
4414  {
4415  target.red=(double) draw_info->border_color.red;
4416  target.green=(double) draw_info->border_color.green;
4417  target.blue=(double) draw_info->border_color.blue;
4418  }
4419  channel_mask=SetImageChannelMask(image,AlphaChannel);
4420  status&=FloodfillPaintImage(image,draw_info,&target,x,y,
4421  primitive_info->method == FloodfillMethod ? MagickFalse :
4422  MagickTrue,exception);
4423  (void) SetImageChannelMask(image,channel_mask);
4424  break;
4425  }
4426  case ResetMethod:
4427  {
4429  sync;
4430 
4431  PixelInfo
4432  pixel;
4433 
4434  for (y=0; y < (ssize_t) image->rows; y++)
4435  {
4436  register Quantum
4437  *magick_restrict q;
4438 
4439  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4440  exception);
4441  if (q == (Quantum *) NULL)
4442  break;
4443  for (x=0; x < (ssize_t) image->columns; x++)
4444  {
4445  GetFillColor(draw_info,x,y,&pixel,exception);
4446  SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
4447  q+=GetPixelChannels(image);
4448  }
4449  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4450  if (sync == MagickFalse)
4451  break;
4452  }
4453  break;
4454  }
4455  }
4456  break;
4457  }
4458  case ColorPrimitive:
4459  {
4460  switch (primitive_info->method)
4461  {
4462  case PointMethod:
4463  default:
4464  {
4465  PixelInfo
4466  pixel;
4467 
4468  register Quantum
4469  *q;
4470 
4471  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4472  if (q == (Quantum *) NULL)
4473  break;
4474  GetPixelInfo(image,&pixel);
4475  GetFillColor(draw_info,x,y,&pixel,exception);
4476  SetPixelViaPixelInfo(image,&pixel,q);
4477  (void) SyncCacheViewAuthenticPixels(image_view,exception);
4478  break;
4479  }
4480  case ReplaceMethod:
4481  {
4483  sync;
4484 
4485  PixelInfo
4486  pixel,
4487  target;
4488 
4489  (void) GetOneCacheViewVirtualPixelInfo(image_view,x,y,&target,
4490  exception);
4491  for (y=0; y < (ssize_t) image->rows; y++)
4492  {
4493  register Quantum
4494  *magick_restrict q;
4495 
4496  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4497  exception);
4498  if (q == (Quantum *) NULL)
4499  break;
4500  for (x=0; x < (ssize_t) image->columns; x++)
4501  {
4502  GetPixelInfoPixel(image,q,&pixel);
4503  if (IsFuzzyEquivalencePixelInfo(&pixel,&target) == MagickFalse)
4504  {
4505  q+=GetPixelChannels(image);
4506  continue;
4507  }
4508  GetFillColor(draw_info,x,y,&pixel,exception);
4509  SetPixelViaPixelInfo(image,&pixel,q);
4510  q+=GetPixelChannels(image);
4511  }
4512  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4513  if (sync == MagickFalse)
4514  break;
4515  }
4516  break;
4517  }
4518  case FloodfillMethod:
4519  case FillToBorderMethod:
4520  {
4521  PixelInfo
4522  target;
4523 
4525  &target,exception);
4526  if (primitive_info->method == FillToBorderMethod)
4527  {
4528  target.red=(double) draw_info->border_color.red;
4529  target.green=(double) draw_info->border_color.green;
4530  target.blue=(double) draw_info->border_color.blue;
4531  }
4532  status&=FloodfillPaintImage(image,draw_info,&target,x,y,
4533  primitive_info->method == FloodfillMethod ? MagickFalse :
4534  MagickTrue,exception);
4535  break;
4536  }
4537  case ResetMethod:
4538  {
4540  sync;
4541 
4542  PixelInfo
4543  pixel;
4544 
4545  GetPixelInfo(image,&pixel);
4546  for (y=0; y < (ssize_t) image->rows; y++)
4547  {
4548  register Quantum
4549  *magick_restrict q;
4550 
4551  q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4552  exception);
4553  if (q == (Quantum *) NULL)
4554  break;
4555  for (x=0; x < (ssize_t) image->columns; x++)
4556  {
4557  GetFillColor(draw_info,x,y,&pixel,exception);
4558  SetPixelViaPixelInfo(image,&pixel,q);
4559  q+=GetPixelChannels(image);
4560  }
4561  sync=SyncCacheViewAuthenticPixels(image_view,exception);
4562  if (sync == MagickFalse)
4563  break;
4564  }
4565  break;
4566  }
4567  }
4568  break;
4569  }
4570  case ImagePrimitive:
4571  {
4572  AffineMatrix
4573  affine;
4574 
4575  char
4576  composite_geometry[MagickPathExtent];
4577 
4578  Image
4579  *composite_image;
4580 
4581  ImageInfo
4582  *clone_info;
4583 
4585  geometry;
4586 
4587  ssize_t
4588  x1,
4589  y1;
4590 
4591  if (primitive_info->text == (char *) NULL)
4592  break;
4593  clone_info=AcquireImageInfo();
4594  if (LocaleNCompare(primitive_info->text,"data:",5) == 0)
4595  composite_image=ReadInlineImage(clone_info,primitive_info->text,
4596  exception);
4597  else
4598  {
4599  (void) CopyMagickString(clone_info->filename,primitive_info->text,
4601  composite_image=ReadImage(clone_info,exception);
4602  }
4603  clone_info=DestroyImageInfo(clone_info);
4604  if (composite_image == (Image *) NULL)
4605  break;
4606  (void) SetImageProgressMonitor(composite_image,(MagickProgressMonitor)
4607  NULL,(void *) NULL);
4608  x1=(ssize_t) ceil(primitive_info[1].point.x-0.5);
4609  y1=(ssize_t) ceil(primitive_info[1].point.y-0.5);
4610  if (((x1 != 0L) && (x1 != (ssize_t) composite_image->columns)) ||
4611  ((y1 != 0L) && (y1 != (ssize_t) composite_image->rows)))
4612  {
4613  /*
4614  Resize image.
4615  */
4616  (void) FormatLocaleString(composite_geometry,MagickPathExtent,
4617  "%gx%g!",primitive_info[1].point.x,primitive_info[1].point.y);
4618  composite_image->filter=image->filter;
4619  (void) TransformImage(&composite_image,(char *) NULL,
4620  composite_geometry,exception);
4621  }
4622  if (composite_image->alpha_trait == UndefinedPixelTrait)
4623  (void) SetImageAlphaChannel(composite_image,OpaqueAlphaChannel,
4624  exception);
4625  if (draw_info->alpha != OpaqueAlpha)
4626  (void) SetImageAlpha(composite_image,draw_info->alpha,exception);
4627  SetGeometry(image,&geometry);
4628  image->gravity=draw_info->gravity;
4629  geometry.x=x;
4630  geometry.y=y;
4631  (void) FormatLocaleString(composite_geometry,MagickPathExtent,
4632  "%.20gx%.20g%+.20g%+.20g",(double) composite_image->columns,(double)
4633  composite_image->rows,(double) geometry.x,(double) geometry.y);
4634  (void) ParseGravityGeometry(image,composite_geometry,&geometry,exception);
4635  affine=draw_info->affine;
4636  affine.tx=(double) geometry.x;
4637  affine.ty=(double) geometry.y;
4638  composite_image->interpolate=image->interpolate;
4639  if (draw_info->compose == OverCompositeOp)
4640  (void) DrawAffineImage(image,composite_image,&affine,exception);
4641  else
4642  (void) CompositeImage(image,composite_image,draw_info->compose,
4643  MagickTrue,geometry.x,geometry.y,exception);
4644  composite_image=DestroyImage(composite_image);
4645  break;
4646  }
4647  case PointPrimitive:
4648  {
4649  PixelInfo
4650  fill_color;
4651 
4652  register Quantum
4653  *q;
4654 
4655  if ((y < 0) || (y >= (ssize_t) image->rows))
4656  break;
4657  if ((x < 0) || (x >= (ssize_t) image->columns))
4658  break;
4659  q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4660  if (q == (Quantum *) NULL)
4661  break;
4662  GetFillColor(draw_info,x,y,&fill_color,exception);
4663  CompositePixelOver(image,&fill_color,(double) fill_color.alpha,q,
4664  (double) GetPixelAlpha(image,q),q);
4665  (void) SyncCacheViewAuthenticPixels(image_view,exception);
4666  break;
4667  }
4668  case TextPrimitive:
4669  {
4670  char
4671  geometry[MagickPathExtent];
4672 
4673  DrawInfo
4674  *clone_info;
4675 
4676  if (primitive_info->text == (char *) NULL)
4677  break;
4678  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4679  (void) CloneString(&clone_info->text,primitive_info->text);
4680  (void) FormatLocaleString(geometry,MagickPathExtent,"%+f%+f",
4681  primitive_info->point.x,primitive_info->point.y);
4682  (void) CloneString(&clone_info->geometry,geometry);
4683  status&=AnnotateImage(image,clone_info,exception);
4684  clone_info=DestroyDrawInfo(clone_info);
4685  break;
4686  }
4687  default:
4688  {
4689  double
4690  mid,
4691  scale;
4692 
4693  DrawInfo
4694  *clone_info;
4695 
4696  if (IsEventLogging() != MagickFalse)
4697  LogPrimitiveInfo(primitive_info);
4698  scale=ExpandAffine(&draw_info->affine);
4699  if ((draw_info->dash_pattern != (double *) NULL) &&
4700  (fabs(draw_info->dash_pattern[0]) >= DrawEpsilon) &&
4701  (fabs(scale*draw_info->stroke_width) >= DrawEpsilon) &&
4702  (draw_info->stroke.alpha != (Quantum) TransparentAlpha))
4703  {
4704  /*
4705  Draw dash polygon.
4706  */
4707  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4708  clone_info->stroke_width=0.0;
4709  clone_info->stroke.alpha=(MagickRealType) TransparentAlpha;
4710  status&=DrawPolygonPrimitive(image,clone_info,primitive_info,
4711  exception);
4712  clone_info=DestroyDrawInfo(clone_info);
4713  (void) DrawDashPolygon(draw_info,primitive_info,image,exception);
4714  break;
4715  }
4716  mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
4717  if ((mid > 1.0) &&
4718  ((draw_info->stroke.alpha != (Quantum) TransparentAlpha) ||
4719  (draw_info->stroke_pattern != (Image *) NULL)))
4720  {
4722  closed_path;
4723 
4724  /*
4725  Draw strokes while respecting line cap/join attributes.
4726  */
4727  for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
4728  closed_path=
4729  (fabs(primitive_info[i-1].point.x-primitive_info[0].point.x) < DrawEpsilon) &&
4730  (fabs(primitive_info[i-1].point.y-primitive_info[0].point.y) < DrawEpsilon) ?
4732  i=(ssize_t) primitive_info[0].coordinates;
4733  if (((closed_path != MagickFalse) &&
4734  (draw_info->linejoin == RoundJoin)) ||
4735  (primitive_info[i].primitive != UndefinedPrimitive))
4736  {
4737  (void) DrawPolygonPrimitive(image,draw_info,primitive_info,
4738  exception);
4739  break;
4740  }
4741  if (draw_info->linecap == RoundCap)
4742  {
4743  (void) DrawPolygonPrimitive(image,draw_info,primitive_info,
4744  exception);
4745  break;
4746  }
4747  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4748  clone_info->stroke_width=0.0;
4749  clone_info->stroke.alpha=(MagickRealType) TransparentAlpha;
4750  status&=DrawPolygonPrimitive(image,clone_info,primitive_info,
4751  exception);
4752  clone_info=DestroyDrawInfo(clone_info);
4753  status&=DrawStrokePolygon(image,draw_info,primitive_info,exception);
4754  break;
4755  }
4756  status&=DrawPolygonPrimitive(image,draw_info,primitive_info,exception);
4757  break;
4758  }
4759  }
4760  image_view=DestroyCacheView(image_view);
4761  if (image->debug != MagickFalse)
4762  (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-primitive");
4763  return(status != 0 ? MagickTrue : MagickFalse);
4764 }
4765 
4766 /*
4767 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4768 % %
4769 % %
4770 % %
4771 + D r a w S t r o k e P o l y g o n %
4772 % %
4773 % %
4774 % %
4775 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4776 %
4777 % DrawStrokePolygon() draws a stroked polygon (line, rectangle, ellipse) on
4778 % the image while respecting the line cap and join attributes.
4779 %
4780 % The format of the DrawStrokePolygon method is:
4781 %
4782 % MagickBooleanType DrawStrokePolygon(Image *image,
4783 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4784 %
4785 % A description of each parameter follows:
4786 %
4787 % o image: the image.
4788 %
4789 % o draw_info: the draw info.
4790 %
4791 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4792 %
4793 %
4794 */
4795 
4796 static void DrawRoundLinecap(Image *image,const DrawInfo *draw_info,
4797  const PrimitiveInfo *primitive_info,ExceptionInfo *exception)
4798 {
4800  linecap[5];
4801 
4802  register ssize_t
4803  i;
4804 
4805  for (i=0; i < 4; i++)
4806  linecap[i]=(*primitive_info);
4807  linecap[0].coordinates=4;
4808  linecap[1].point.x+=2.0*DrawEpsilon;
4809  linecap[2].point.x+=2.0*DrawEpsilon;
4810  linecap[2].point.y+=2.0*DrawEpsilon;
4811  linecap[3].point.y+=2.0*DrawEpsilon;
4812  linecap[4].primitive=UndefinedPrimitive;
4813  (void) DrawPolygonPrimitive(image,draw_info,linecap,exception);
4814 }
4815 
4817  const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
4818  ExceptionInfo *exception)
4819 {
4820  DrawInfo
4821  *clone_info;
4822 
4824  closed_path;
4825 
4827  status;
4828 
4830  *stroke_polygon;
4831 
4832  register const PrimitiveInfo
4833  *p,
4834  *q;
4835 
4836  /*
4837  Draw stroked polygon.
4838  */
4839  if (image->debug != MagickFalse)
4841  " begin draw-stroke-polygon");
4842  clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4843  clone_info->fill=draw_info->stroke;
4844  if (clone_info->fill_pattern != (Image *) NULL)
4845  clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
4846  if (clone_info->stroke_pattern != (Image *) NULL)
4847  clone_info->fill_pattern=CloneImage(clone_info->stroke_pattern,0,0,
4848  MagickTrue,exception);
4850  clone_info->stroke_width=0.0;
4851  clone_info->fill_rule=NonZeroRule;
4852  status=MagickTrue;
4853  for (p=primitive_info; p->primitive != UndefinedPrimitive; p+=p->coordinates)
4854  {
4855  stroke_polygon=TraceStrokePolygon(draw_info,p);
4856  status&=DrawPolygonPrimitive(image,clone_info,stroke_polygon,exception);
4857  if (status == 0)
4858  break;
4859  stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
4860  q=p+p->coordinates-1;
4861  closed_path=(fabs(q->point.x-p->point.x) < DrawEpsilon) &&
4862  (fabs(q->point.y-p->point.y) < DrawEpsilon) ? MagickTrue : MagickFalse;
4863  if ((draw_info->linecap == RoundCap) && (closed_path == MagickFalse))
4864  {
4865  DrawRoundLinecap(image,draw_info,p,exception);
4866  DrawRoundLinecap(image,draw_info,q,exception);
4867  }
4868  }
4869  clone_info=DestroyDrawInfo(clone_info);
4870  if (image->debug != MagickFalse)
4872  " end draw-stroke-polygon");
4873  return(status != 0 ? MagickTrue : MagickFalse);
4874 }
4875 
4876 /*
4877 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4878 % %
4879 % %
4880 % %
4881 % G e t A f f i n e M a t r i x %
4882 % %
4883 % %
4884 % %
4885 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4886 %
4887 % GetAffineMatrix() returns an AffineMatrix initialized to the identity
4888 % matrix.
4889 %
4890 % The format of the GetAffineMatrix method is:
4891 %
4892 % void GetAffineMatrix(AffineMatrix *affine_matrix)
4893 %
4894 % A description of each parameter follows:
4895 %
4896 % o affine_matrix: the affine matrix.
4897 %
4898 */
4900 {
4901  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
4902  assert(affine_matrix != (AffineMatrix *) NULL);
4903  (void) ResetMagickMemory(affine_matrix,0,sizeof(*affine_matrix));
4904  affine_matrix->sx=1.0;
4905  affine_matrix->sy=1.0;
4906 }
4907 
4908 /*
4909 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4910 % %
4911 % %
4912 % %
4913 + G e t D r a w I n f o %
4914 % %
4915 % %
4916 % %
4917 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4918 %
4919 % GetDrawInfo() initializes draw_info to default values from image_info.
4920 %
4921 % The format of the GetDrawInfo method is:
4922 %
4923 % void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
4924 %
4925 % A description of each parameter follows:
4926 %
4927 % o image_info: the image info..
4928 %
4929 % o draw_info: the draw info.
4930 %
4931 */
4932 MagickExport void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
4933 {
4934  char
4935  *next_token;
4936 
4937  const char
4938  *option;
4939 
4941  *exception;
4942 
4943  ImageInfo
4944  *clone_info;
4945 
4946  /*
4947  Initialize draw attributes.
4948  */
4949  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
4950  assert(draw_info != (DrawInfo *) NULL);
4951  (void) ResetMagickMemory(draw_info,0,sizeof(*draw_info));
4952  clone_info=CloneImageInfo(image_info);
4953  GetAffineMatrix(&draw_info->affine);
4954  exception=AcquireExceptionInfo();
4955  (void) QueryColorCompliance("#000F",AllCompliance,&draw_info->fill,
4956  exception);
4957  (void) QueryColorCompliance("#0000",AllCompliance,&draw_info->stroke,
4958  exception);
4959  draw_info->stroke_width=1.0;
4960  draw_info->fill_rule=EvenOddRule;
4961  draw_info->fill_alpha=OpaqueAlpha;
4962  draw_info->stroke_alpha=OpaqueAlpha;
4963  draw_info->linecap=ButtCap;
4964  draw_info->linejoin=MiterJoin;
4965  draw_info->miterlimit=10;
4966  draw_info->decorate=NoDecoration;
4967  draw_info->pointsize=12.0;
4969  draw_info->compose=OverCompositeOp;
4970  draw_info->render=MagickTrue;
4971  draw_info->debug=IsEventLogging();
4972  draw_info->stroke_antialias=clone_info->antialias;
4973  if (clone_info->font != (char *) NULL)
4974  draw_info->font=AcquireString(clone_info->font);
4975  if (clone_info->density != (char *) NULL)
4976  draw_info->density=AcquireString(clone_info->density);
4977  draw_info->text_antialias=clone_info->antialias;
4978  if (fabs(clone_info->pointsize) >= DrawEpsilon)
4979  draw_info->pointsize=clone_info->pointsize;
4980  draw_info->border_color=clone_info->border_color;
4981  if (clone_info->server_name != (char *) NULL)
4982  draw_info->server_name=AcquireString(clone_info->server_name);
4983  option=GetImageOption(clone_info,"direction");
4984  if (option != (const char *) NULL)
4987  else
4988  draw_info->direction=UndefinedDirection;
4989  option=GetImageOption(clone_info,"encoding");
4990  if (option != (const char *) NULL)
4991  (void) CloneString(&draw_info->encoding,option);
4992  option=GetImageOption(clone_info,"family");
4993  if (option != (const char *) NULL)
4994  (void) CloneString(&draw_info->family,option);
4995  option=GetImageOption(clone_info,"fill");
4996  if (option != (const char *) NULL)
4997  (void) QueryColorCompliance(option,AllCompliance,&draw_info->fill,
4998  exception);
4999  option=GetImageOption(clone_info,"gravity");
5000  if (option != (const char *) NULL)
5002  MagickFalse,option);
5003  option=GetImageOption(clone_info,"interline-spacing");
5004  if (option != (const char *) NULL)
5005  draw_info->interline_spacing=StringToDouble(option,&next_token);
5006  option=GetImageOption(clone_info,"interword-spacing");
5007  if (option != (const char *) NULL)
5008  draw_info->interword_spacing=StringToDouble(option,&next_token);
5009  option=GetImageOption(clone_info,"kerning");
5010  if (option != (const char *) NULL)
5011  draw_info->kerning=StringToDouble(option,&next_token);
5012  option=GetImageOption(clone_info,"stroke");
5013  if (option != (const char *) NULL)
5014  (void) QueryColorCompliance(option,AllCompliance,&draw_info->stroke,
5015  exception);
5016  option=GetImageOption(clone_info,"strokewidth");
5017  if (option != (const char *) NULL)
5018  draw_info->stroke_width=StringToDouble(option,&next_token);
5019  option=GetImageOption(clone_info,"style");
5020  if (option != (const char *) NULL)
5022  MagickFalse,option);
5023  option=GetImageOption(clone_info,"undercolor");
5024  if (option != (const char *) NULL)
5025  (void) QueryColorCompliance(option,AllCompliance,&draw_info->undercolor,
5026  exception);
5027  option=GetImageOption(clone_info,"weight");
5028  if (option != (const char *) NULL)
5029  {
5030  ssize_t
5031  weight;
5032 
5034  if (weight == -1)
5035  weight=(ssize_t) StringToUnsignedLong(option);
5036  draw_info->weight=(size_t) weight;
5037  }
5038  exception=DestroyExceptionInfo(exception);
5039  draw_info->signature=MagickCoreSignature;
5040  clone_info=DestroyImageInfo(clone_info);
5041 }
5042 
5043 /*
5044 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5045 % %
5046 % %
5047 % %
5048 + P e r m u t a t e %
5049 % %
5050 % %
5051 % %
5052 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5053 %
5054 % Permutate() returns the permuation of the (n,k).
5055 %
5056 % The format of the Permutate method is:
5057 %
5058 % void Permutate(ssize_t n,ssize_t k)
5059 %
5060 % A description of each parameter follows:
5061 %
5062 % o n:
5063 %
5064 % o k:
5065 %
5066 %
5067 */
5068 static inline double Permutate(const ssize_t n,const ssize_t k)
5069 {
5070  double
5071  r;
5072 
5073  register ssize_t
5074  i;
5075 
5076  r=1.0;
5077  for (i=k+1; i <= n; i++)
5078  r*=i;
5079  for (i=1; i <= (n-k); i++)
5080  r/=i;
5081  return(r);
5082 }
5083 
5084 /*
5085 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5086 % %
5087 % %
5088 % %
5089 + T r a c e P r i m i t i v e %
5090 % %
5091 % %
5092 % %
5093 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
5094 %
5095 % TracePrimitive is a collection of methods for generating graphic
5096 % primitives such as arcs, ellipses, paths, etc.
5097 %
5098 */
5099 
5100 static void TraceArc(PrimitiveInfo *primitive_info,const PointInfo start,
5101  const PointInfo end,const PointInfo degrees)
5102 {
5103  PointInfo
5104  center,
5105  radii;
5106 
5107  center.x=0.5*(end.x+start.x);
5108  center.y=0.5*(end.y+start.y);
5109  radii.x=fabs(center.x-start.x);
5110  radii.y=fabs(center.y-start.y);
5111  TraceEllipse(primitive_info,center,radii,degrees);
5112 }
5113 
5114 static void TraceArcPath(PrimitiveInfo *primitive_info,const PointInfo start,
5115  const PointInfo end,const PointInfo arc,const double angle,
5116  const MagickBooleanType large_arc,const MagickBooleanType sweep)
5117 {
5118  double
5119  alpha,
5120  beta,
5121  delta,
5122  factor,
5123  gamma,
5124  theta;
5125 
5126  PointInfo
5127  center,
5128  points[3],
5129  radii;
5130 
5131  register double
5132  cosine,
5133  sine;
5134 
5135  register PrimitiveInfo
5136  *p;
5137 
5138  register ssize_t
5139  i;
5140 
5141  size_t
5142  arc_segments;
5143 
5144  if ((fabs(start.x-end.x) < DrawEpsilon) &&
5145  (fabs(start.y-end.y) < DrawEpsilon))
5146  {
5147  TracePoint(primitive_info,end);
5148  return;
5149  }
5150  radii.x=fabs(arc.x);
5151  radii.y=fabs(arc.y);
5152  if ((fabs(radii.x) < DrawEpsilon) || (fabs(radii.y) < DrawEpsilon))
5153  {
5154  TraceLine(primitive_info,start,end);
5155  return;
5156  }
5157  cosine=cos(DegreesToRadians(fmod((double) angle,360.0)));
5158  sine=sin(DegreesToRadians(fmod((double) angle,360.0)));
5159  center.x=(double) (cosine*(end.x-start.x)/2+sine*(end.y-start.y)/2);
5160  center.y=(double) (cosine*(end.y-start.y)/2-sine*(end.x-start.x)/2);
5161  delta=(center.x*center.x)/(radii.x*radii.x)+(center.y*center.y)/
5162  (radii.y*radii.y);
5163  if (delta < DrawEpsilon)
5164  {
5165  TraceLine(primitive_info,start,end);
5166  return;
5167  }
5168  if (delta > 1.0)
5169  {
5170  radii.x*=sqrt((double) delta);
5171  radii.y*=sqrt((double) delta);
5172  }
5173  points[0].x=(double) (cosine*start.x/radii.x+sine*start.y/radii.x);
5174  points[0].y=(double) (cosine*start.y/radii.y-sine*start.x/radii.y);
5175  points[1].x=(double) (cosine*end.x/radii.x+sine*end.y/radii.x);
5176  points[1].y=(double) (cosine*end.y/radii.y-sine*end.x/radii.y);
5177  alpha=points[1].x-points[0].x;
5178  beta=points[1].y-points[0].y;
5179  factor=PerceptibleReciprocal(alpha*alpha+beta*beta)-0.25;
5180  if (factor <= 0.0)
5181  factor=0.0;
5182  else
5183  {
5184  factor=sqrt((double) factor);
5185  if (sweep == large_arc)
5186  factor=(-factor);
5187  }
5188  center.x=(double) ((points[0].x+points[1].x)/2-factor*beta);
5189  center.y=(double) ((points[0].y+points[1].y)/2+factor*alpha);
5190  alpha=atan2(points[0].y-center.y,points[0].x-center.x);
5191  theta=atan2(points[1].y-center.y,points[1].x-center.x)-alpha;
5192  if ((theta < 0.0) && (sweep != MagickFalse))
5193  theta+=(double) (2.0*MagickPI);
5194  else
5195  if ((theta > 0.0) && (sweep == MagickFalse))
5196  theta-=(double) (2.0*MagickPI);
5197  arc_segments=(size_t) ceil(fabs((double) (theta/(0.5*MagickPI+
5198  DrawEpsilon))));
5199  p=primitive_info;
5200  for (i=0; i < (ssize_t) arc_segments; i++)
5201  {
5202  beta=0.5*((alpha+(i+1)*theta/arc_segments)-(alpha+i*theta/arc_segments));
5203  gamma=(8.0/3.0)*sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))*
5204  sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))/
5205  sin(fmod((double) beta,DegreesToRadians(360.0)));
5206  points[0].x=(double) (center.x+cos(fmod((double) (alpha+(double) i*theta/
5207  arc_segments),DegreesToRadians(360.0)))-gamma*sin(fmod((double) (alpha+
5208  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
5209  points[0].y=(double) (center.y+sin(fmod((double) (alpha+(double) i*theta/
5210  arc_segments),DegreesToRadians(360.0)))+gamma*cos(fmod((double) (alpha+
5211  (double) i*theta/arc_segments),DegreesToRadians(360.0))));
5212  points[2].x=(double) (center.x+cos(fmod((double) (alpha+(double) (i+1)*
5213  theta/arc_segments),DegreesToRadians(360.0))));
5214  points[2].y=(double) (center.y+sin(fmod((double) (alpha+(double) (i+1)*
5215  theta/arc_segments),DegreesToRadians(360.0))));
5216  points[1].x=(double) (points[2].x+gamma*sin(fmod((double) (alpha+(double)
5217  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
5218  points[1].y=(double) (points[2].y-gamma*cos(fmod((double) (alpha+(double)
5219  (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
5220  p->point.x=(p == primitive_info) ? start.x : (p-1)->point.x;
5221  p->point.y=(p == primitive_info) ? start.y : (p-1)->point.y;
5222  (p+1)->point.x=(double) (cosine*radii.x*points[0].x-sine*radii.y*
5223  points[0].y);
5224  (p+1)->point.y=(double) (sine*radii.x*points[0].x+cosine*radii.y*
5225  points[0].y);
5226  (p+2)->point.x=(double) (cosine*radii.x*points[1].x-sine*radii.y*
5227  points[1].y);
5228  (p+2)->point.y=(double) (sine*radii.x*points[1].x+cosine*radii.y*
5229  points[1].y);
5230  (p+3)->point.x=(double) (cosine*radii.x*points[2].x-sine*radii.y*
5231  points[2].y);
5232  (p+3)->point.y=(double) (sine*radii.x*points[2].x+cosine*radii.y*
5233  points[2].y);
5234  if (i == (ssize_t) (arc_segments-1))
5235  (p+3)->point=end;
5236  TraceBezier(p,4);
5237  p+=p->coordinates;
5238  }
5239  primitive_info->coordinates=(size_t) (p-primitive_info);
5240  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5241  {
5242  p->primitive=primitive_info->primitive;
5243  p--;
5244  }
5245 }
5246 
5247 static void TraceBezier(PrimitiveInfo *primitive_info,
5248  const size_t number_coordinates)
5249 {
5250  double
5251  alpha,
5252  *coefficients,
5253  weight;
5254 
5255  PointInfo
5256  end,
5257  point,
5258  *points;
5259 
5260  register PrimitiveInfo
5261  *p;
5262 
5263  register ssize_t
5264  i,
5265  j;
5266 
5267  size_t
5268  control_points,
5269  quantum;
5270 
5271  /*
5272  Allocate coeficients.
5273  */
5274  quantum=number_coordinates;
5275  for (i=0; i < (ssize_t) number_coordinates; i++)
5276  {
5277  for (j=i+1; j < (ssize_t) number_coordinates; j++)
5278  {
5279  alpha=fabs(primitive_info[j].point.x-primitive_info[i].point.x);
5280  if (alpha > (double) quantum)
5281  quantum=(size_t) alpha;
5282  alpha=fabs(primitive_info[j].point.y-primitive_info[i].point.y);
5283  if (alpha > (double) quantum)
5284  quantum=(size_t) alpha;
5285  }
5286  }
5287  quantum=(size_t) MagickMin((double) quantum/number_coordinates,
5288  (double) BezierQuantum);
5289  control_points=quantum*number_coordinates;
5290  coefficients=(double *) AcquireQuantumMemory((size_t)
5291  number_coordinates,sizeof(*coefficients));
5292  points=(PointInfo *) AcquireQuantumMemory((size_t) control_points,
5293  sizeof(*points));
5294  if ((coefficients == (double *) NULL) || (points == (PointInfo *) NULL))
5295  ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
5296  /*
5297  Compute bezier points.
5298  */
5299  end=primitive_info[number_coordinates-1].point;
5300  for (i=0; i < (ssize_t) number_coordinates; i++)
5301  coefficients[i]=Permutate((ssize_t) number_coordinates-1,i);
5302  weight=0.0;
5303  for (i=0; i < (ssize_t) control_points; i++)
5304  {
5305  p=primitive_info;
5306  point.x=0.0;
5307  point.y=0.0;
5308  alpha=pow((double) (1.0-weight),(double) number_coordinates-1.0);
5309  for (j=0; j < (ssize_t) number_coordinates; j++)
5310  {
5311  point.x+=alpha*coefficients[j]*p->point.x;
5312  point.y+=alpha*coefficients[j]*p->point.y;
5313  alpha*=weight/(1.0-weight);
5314  p++;
5315  }
5316  points[i]=point;
5317  weight+=1.0/control_points;
5318  }
5319  /*
5320  Bezier curves are just short segmented polys.
5321  */
5322  p=primitive_info;
5323  for (i=0; i < (ssize_t) control_points; i++)
5324  {
5325  TracePoint(p,points[i]);
5326  p+=p->coordinates;
5327  }
5328  TracePoint(p,end);
5329  p+=p->coordinates;
5330  primitive_info->coordinates=(size_t) (p-primitive_info);
5331  for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5332  {
5333  p->primitive=primitive_info->primitive;
5334  p--;
5335  }
5336  points=(PointInfo *) RelinquishMagickMemory(points);
5337  coefficients=(double *) RelinquishMagickMemory(coefficients);
5338 }
5339 
5340 static void TraceCircle(PrimitiveInfo *primitive_info,const PointInfo start,
5341  const PointInfo end)
5342 {
5343  double
5344  alpha,
5345  beta,
5346  radius;
5347 
5348  PointInfo
5349  offset,
5350  degrees;
5351 
5352  alpha=end.x-start.x;
5353  beta=end.y-start.y;
5354  radius=hypot((double) alpha,(double) beta);
5355  offset.x=(double) radius;
5356  offset.y=(double) radius;
5357  degrees.x=0.0;
5358  degrees.y=360.0;
5359  TraceEllipse(primitive_info,start,offset,degrees);
5360 }
5361 
5362 static void TraceEllipse(PrimitiveInfo *primitive_info,const PointInfo start,
5363  const PointInfo stop,const PointInfo degrees)
5364 {
5365  double
5366  delta,
5367  step,
5368  y;
5369 
5370  PointInfo
5371  angle,
5372  point;
5373 
5374  register PrimitiveInfo
5375  *p;
5376 
5377  register ssize_t
5378  i;
5379 
5380  /*
5381  Ellipses are just short segmented polys.
5382  */
5383  if ((fabs(stop.x) < DrawEpsilon) && (fabs(stop.y) < DrawEpsilon))
5384  {
5385  TracePoint(primitive_info,start);