2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
8 % D D RRRR AAAAA W W W %
13 % MagickCore Image Drawing Methods %
21 % Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization %
22 % dedicated to making software imaging solutions freely available. %
24 % You may not use this file except in compliance with the License. You may %
25 % obtain a copy of the License at %
27 % http://www.imagemagick.org/script/license.php %
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. %
35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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.
48 #include "magick/studio.h"
49 #include "magick/annotate.h"
50 #include "magick/artifact.h"
51 #include "magick/blob.h"
52 #include "magick/cache.h"
53 #include "magick/cache-view.h"
54 #include "magick/color.h"
55 #include "magick/composite.h"
56 #include "magick/composite-private.h"
57 #include "magick/constitute.h"
58 #include "magick/draw.h"
59 #include "magick/draw-private.h"
60 #include "magick/enhance.h"
61 #include "magick/exception.h"
62 #include "magick/exception-private.h"
63 #include "magick/gem.h"
64 #include "magick/geometry.h"
65 #include "magick/image-private.h"
66 #include "magick/list.h"
67 #include "magick/log.h"
68 #include "magick/monitor.h"
69 #include "magick/monitor-private.h"
70 #include "magick/option.h"
71 #include "magick/paint.h"
72 #include "magick/pixel-private.h"
73 #include "magick/property.h"
74 #include "magick/resample.h"
75 #include "magick/resample-private.h"
76 #include "magick/string_.h"
77 #include "magick/string-private.h"
78 #include "magick/thread-private.h"
79 #include "magick/token.h"
80 #include "magick/transform.h"
81 #include "magick/utility.h"
86 #define BezierQuantum 200
91 typedef struct _EdgeInfo
115 typedef struct _ElementInfo
125 typedef struct _PolygonInfo
143 typedef struct _PathInfo
153 Forward declarations.
155 static MagickBooleanType
156 DrawStrokePolygon(Image *,const DrawInfo *,const PrimitiveInfo *);
159 *TraceStrokePolygon(const DrawInfo *,const PrimitiveInfo *);
162 TracePath(PrimitiveInfo *,const char *);
165 TraceArc(PrimitiveInfo *,const PointInfo,const PointInfo,const PointInfo),
166 TraceArcPath(PrimitiveInfo *,const PointInfo,const PointInfo,const PointInfo,
167 const MagickRealType,const MagickBooleanType,const MagickBooleanType),
168 TraceBezier(PrimitiveInfo *,const size_t),
169 TraceCircle(PrimitiveInfo *,const PointInfo,const PointInfo),
170 TraceEllipse(PrimitiveInfo *,const PointInfo,const PointInfo,const PointInfo),
171 TraceLine(PrimitiveInfo *,const PointInfo,const PointInfo),
172 TraceRectangle(PrimitiveInfo *,const PointInfo,const PointInfo),
173 TraceRoundRectangle(PrimitiveInfo *,const PointInfo,const PointInfo,
175 TraceSquareLinecap(PrimitiveInfo *,const size_t,const MagickRealType);
178 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
182 % A c q u i r e D r a w I n f o %
186 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
188 % AcquireDrawInfo() returns a DrawInfo structure properly initialized.
190 % The format of the AcquireDrawInfo method is:
192 % DrawInfo *AcquireDrawInfo(void)
195 MagickExport DrawInfo *AcquireDrawInfo(void)
200 draw_info=(DrawInfo *) AcquireMagickMemory(sizeof(*draw_info));
201 if (draw_info == (DrawInfo *) NULL)
202 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
203 GetDrawInfo((ImageInfo *) NULL,draw_info);
208 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
212 % C l o n e D r a w I n f o %
216 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
218 % CloneDrawInfo() makes a copy of the given draw info structure. If NULL
219 % is specified, a new image info structure is created initialized to
222 % The format of the CloneDrawInfo method is:
224 % DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
225 % const DrawInfo *draw_info)
227 % A description of each parameter follows:
229 % o image_info: the image info.
231 % o draw_info: the draw info.
234 MagickExport DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
235 const DrawInfo *draw_info)
240 clone_info=(DrawInfo *) AcquireMagickMemory(sizeof(*clone_info));
241 if (clone_info == (DrawInfo *) NULL)
242 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
243 GetDrawInfo(image_info,clone_info);
244 if (draw_info == (DrawInfo *) NULL)
246 if (clone_info->primitive != (char *) NULL)
247 (void) CloneString(&clone_info->primitive,draw_info->primitive);
248 if (draw_info->geometry != (char *) NULL)
249 (void) CloneString(&clone_info->geometry,draw_info->geometry);
250 clone_info->viewbox=draw_info->viewbox;
251 clone_info->affine=draw_info->affine;
252 clone_info->gravity=draw_info->gravity;
253 clone_info->fill=draw_info->fill;
254 clone_info->stroke=draw_info->stroke;
255 clone_info->stroke_width=draw_info->stroke_width;
256 if (draw_info->fill_pattern != (Image *) NULL)
257 clone_info->fill_pattern=CloneImage(draw_info->fill_pattern,0,0,MagickTrue,
258 &draw_info->fill_pattern->exception);
260 if (draw_info->tile != (Image *) NULL)
261 clone_info->fill_pattern=CloneImage(draw_info->tile,0,0,MagickTrue,
262 &draw_info->tile->exception);
263 clone_info->tile=NewImageList(); /* tile is deprecated */
264 if (draw_info->stroke_pattern != (Image *) NULL)
265 clone_info->stroke_pattern=CloneImage(draw_info->stroke_pattern,0,0,
266 MagickTrue,&draw_info->stroke_pattern->exception);
267 clone_info->stroke_antialias=draw_info->stroke_antialias;
268 clone_info->text_antialias=draw_info->text_antialias;
269 clone_info->fill_rule=draw_info->fill_rule;
270 clone_info->linecap=draw_info->linecap;
271 clone_info->linejoin=draw_info->linejoin;
272 clone_info->miterlimit=draw_info->miterlimit;
273 clone_info->dash_offset=draw_info->dash_offset;
274 clone_info->decorate=draw_info->decorate;
275 clone_info->compose=draw_info->compose;
276 if (draw_info->text != (char *) NULL)
277 (void) CloneString(&clone_info->text,draw_info->text);
278 if (draw_info->font != (char *) NULL)
279 (void) CloneString(&clone_info->font,draw_info->font);
280 if (draw_info->metrics != (char *) NULL)
281 (void) CloneString(&clone_info->metrics,draw_info->metrics);
282 if (draw_info->family != (char *) NULL)
283 (void) CloneString(&clone_info->family,draw_info->family);
284 clone_info->style=draw_info->style;
285 clone_info->stretch=draw_info->stretch;
286 clone_info->weight=draw_info->weight;
287 if (draw_info->encoding != (char *) NULL)
288 (void) CloneString(&clone_info->encoding,draw_info->encoding);
289 clone_info->pointsize=draw_info->pointsize;
290 clone_info->kerning=draw_info->kerning;
291 clone_info->interline_spacing=draw_info->interline_spacing;
292 clone_info->interword_spacing=draw_info->interword_spacing;
293 clone_info->direction=draw_info->direction;
294 if (draw_info->density != (char *) NULL)
295 (void) CloneString(&clone_info->density,draw_info->density);
296 clone_info->align=draw_info->align;
297 clone_info->undercolor=draw_info->undercolor;
298 clone_info->border_color=draw_info->border_color;
299 if (draw_info->server_name != (char *) NULL)
300 (void) CloneString(&clone_info->server_name,draw_info->server_name);
301 if (draw_info->dash_pattern != (double *) NULL)
306 for (x=0; draw_info->dash_pattern[x] != 0.0; x++) ;
307 clone_info->dash_pattern=(double *) AcquireQuantumMemory((size_t) x+1UL,
308 sizeof(*clone_info->dash_pattern));
309 if (clone_info->dash_pattern == (double *) NULL)
310 ThrowFatalException(ResourceLimitFatalError,
311 "UnableToAllocateDashPattern");
312 (void) CopyMagickMemory(clone_info->dash_pattern,draw_info->dash_pattern,
313 (size_t) (x+1)*sizeof(*clone_info->dash_pattern));
315 clone_info->gradient=draw_info->gradient;
316 if (draw_info->gradient.stops != (StopInfo *) NULL)
321 number_stops=clone_info->gradient.number_stops;
322 clone_info->gradient.stops=(StopInfo *) AcquireQuantumMemory((size_t)
323 number_stops,sizeof(*clone_info->gradient.stops));
324 if (clone_info->gradient.stops == (StopInfo *) NULL)
325 ThrowFatalException(ResourceLimitFatalError,
326 "UnableToAllocateDashPattern");
327 (void) CopyMagickMemory(clone_info->gradient.stops,
328 draw_info->gradient.stops,(size_t) number_stops*
329 sizeof(*clone_info->gradient.stops));
331 if (draw_info->clip_mask != (char *) NULL)
332 (void) CloneString(&clone_info->clip_mask,draw_info->clip_mask);
333 clone_info->bounds=draw_info->bounds;
334 clone_info->clip_units=draw_info->clip_units;
335 clone_info->render=draw_info->render;
336 clone_info->opacity=draw_info->opacity;
337 clone_info->element_reference=draw_info->element_reference;
338 clone_info->debug=IsEventLogging();
343 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
347 + C o n v e r t P a t h T o P o l y g o n %
351 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
353 % ConvertPathToPolygon() converts a path to the more efficient sorted
356 % The format of the ConvertPathToPolygon method is:
358 % PolygonInfo *ConvertPathToPolygon(const DrawInfo *draw_info,
359 % const PathInfo *path_info)
361 % A description of each parameter follows:
363 % o Method ConvertPathToPolygon returns the path in a more efficient sorted
364 % rendering form of type PolygonInfo.
366 % o draw_info: Specifies a pointer to an DrawInfo structure.
368 % o path_info: Specifies a pointer to an PathInfo structure.
373 #if defined(__cplusplus) || defined(c_plusplus)
377 static int CompareEdges(const void *x,const void *y)
379 register const EdgeInfo
386 p=(const EdgeInfo *) x;
387 q=(const EdgeInfo *) y;
388 if ((p->points[0].y-MagickEpsilon) > q->points[0].y)
390 if ((p->points[0].y+MagickEpsilon) < q->points[0].y)
392 if ((p->points[0].x-MagickEpsilon) > q->points[0].x)
394 if ((p->points[0].x+MagickEpsilon) < q->points[0].x)
396 if (((p->points[1].x-p->points[0].x)*(q->points[1].y-q->points[0].y)-
397 (p->points[1].y-p->points[0].y)*(q->points[1].x-q->points[0].x)) > 0.0)
402 #if defined(__cplusplus) || defined(c_plusplus)
406 static void LogPolygonInfo(const PolygonInfo *polygon_info)
415 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin active-edge");
416 p=polygon_info->edges;
417 for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
419 (void) LogMagickEvent(DrawEvent,GetMagickModule()," edge %.20g:",
421 (void) LogMagickEvent(DrawEvent,GetMagickModule()," direction: %s",
422 p->direction != MagickFalse ? "down" : "up");
423 (void) LogMagickEvent(DrawEvent,GetMagickModule()," ghostline: %s",
424 p->ghostline != MagickFalse ? "transparent" : "opaque");
425 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
426 " bounds: %g %g - %g %g",p->bounds.x1,p->bounds.y1,
427 p->bounds.x2,p->bounds.y2);
428 for (j=0; j < (ssize_t) p->number_points; j++)
429 (void) LogMagickEvent(DrawEvent,GetMagickModule()," %g %g",
430 p->points[j].x,p->points[j].y);
433 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end active-edge");
436 static void ReversePoints(PointInfo *points,const size_t number_points)
444 for (i=0; i < (ssize_t) (number_points >> 1); i++)
447 points[i]=points[number_points-(i+1)];
448 points[number_points-(i+1)]=point;
452 static PolygonInfo *ConvertPathToPolygon(
453 const DrawInfo *magick_unused(draw_info),const PathInfo *path_info)
482 Convert a path to the more efficient sorted rendering form.
484 polygon_info=(PolygonInfo *) AcquireMagickMemory(sizeof(*polygon_info));
485 if (polygon_info == (PolygonInfo *) NULL)
486 return((PolygonInfo *) NULL);
488 polygon_info->edges=(EdgeInfo *) AcquireQuantumMemory((size_t) number_edges,
489 sizeof(*polygon_info->edges));
490 if (polygon_info->edges == (EdgeInfo *) NULL)
491 return((PolygonInfo *) NULL);
494 ghostline=MagickFalse;
497 points=(PointInfo *) NULL;
498 (void) ResetMagickMemory(&point,0,sizeof(point));
499 (void) ResetMagickMemory(&bounds,0,sizeof(bounds));
500 for (i=0; path_info[i].code != EndCode; i++)
502 if ((path_info[i].code == MoveToCode) || (path_info[i].code == OpenCode) ||
503 (path_info[i].code == GhostlineCode))
508 if ((points != (PointInfo *) NULL) && (n >= 2))
510 if (edge == number_edges)
513 polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
514 polygon_info->edges,(size_t) number_edges,
515 sizeof(*polygon_info->edges));
516 if (polygon_info->edges == (EdgeInfo *) NULL)
517 return((PolygonInfo *) NULL);
519 polygon_info->edges[edge].number_points=(size_t) n;
520 polygon_info->edges[edge].scanline=(-1.0);
521 polygon_info->edges[edge].highwater=0;
522 polygon_info->edges[edge].ghostline=ghostline;
523 polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
525 ReversePoints(points,(size_t) n);
526 polygon_info->edges[edge].points=points;
527 polygon_info->edges[edge].bounds=bounds;
528 polygon_info->edges[edge].bounds.y1=points[0].y;
529 polygon_info->edges[edge].bounds.y2=points[n-1].y;
530 points=(PointInfo *) NULL;
531 ghostline=MagickFalse;
534 if (points == (PointInfo *) NULL)
537 points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
539 if (points == (PointInfo *) NULL)
540 return((PolygonInfo *) NULL);
542 ghostline=path_info[i].code == GhostlineCode ? MagickTrue : MagickFalse;
543 point=path_info[i].point;
554 next_direction=((path_info[i].point.y > point.y) ||
555 ((path_info[i].point.y == point.y) &&
556 (path_info[i].point.x > point.x))) ? 1 : -1;
557 if ((direction != 0) && (direction != next_direction))
563 if (edge == number_edges)
566 polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
567 polygon_info->edges,(size_t) number_edges,
568 sizeof(*polygon_info->edges));
569 if (polygon_info->edges == (EdgeInfo *) NULL)
570 return((PolygonInfo *) NULL);
572 polygon_info->edges[edge].number_points=(size_t) n;
573 polygon_info->edges[edge].scanline=(-1.0);
574 polygon_info->edges[edge].highwater=0;
575 polygon_info->edges[edge].ghostline=ghostline;
576 polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
578 ReversePoints(points,(size_t) n);
579 polygon_info->edges[edge].points=points;
580 polygon_info->edges[edge].bounds=bounds;
581 polygon_info->edges[edge].bounds.y1=points[0].y;
582 polygon_info->edges[edge].bounds.y2=points[n-1].y;
584 points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
586 if (points == (PointInfo *) NULL)
587 return((PolygonInfo *) NULL);
589 ghostline=MagickFalse;
595 direction=next_direction;
596 if (points == (PointInfo *) NULL)
598 if (n == (ssize_t) number_points)
601 points=(PointInfo *) ResizeQuantumMemory(points,(size_t) number_points,
603 if (points == (PointInfo *) NULL)
604 return((PolygonInfo *) NULL);
606 point=path_info[i].point;
608 if (point.x < bounds.x1)
610 if (point.x > bounds.x2)
614 if (points != (PointInfo *) NULL)
617 points=(PointInfo *) RelinquishMagickMemory(points);
620 if (edge == number_edges)
623 polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
624 polygon_info->edges,(size_t) number_edges,
625 sizeof(*polygon_info->edges));
626 if (polygon_info->edges == (EdgeInfo *) NULL)
627 return((PolygonInfo *) NULL);
629 polygon_info->edges[edge].number_points=(size_t) n;
630 polygon_info->edges[edge].scanline=(-1.0);
631 polygon_info->edges[edge].highwater=0;
632 polygon_info->edges[edge].ghostline=ghostline;
633 polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
635 ReversePoints(points,(size_t) n);
636 polygon_info->edges[edge].points=points;
637 polygon_info->edges[edge].bounds=bounds;
638 polygon_info->edges[edge].bounds.y1=points[0].y;
639 polygon_info->edges[edge].bounds.y2=points[n-1].y;
640 ghostline=MagickFalse;
644 polygon_info->number_edges=edge;
645 qsort(polygon_info->edges,(size_t) polygon_info->number_edges,
646 sizeof(*polygon_info->edges),CompareEdges);
647 if (IsEventLogging() != MagickFalse)
648 LogPolygonInfo(polygon_info);
649 return(polygon_info);
653 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
657 + C o n v e r t P r i m i t i v e T o P a t h %
661 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
663 % ConvertPrimitiveToPath() converts a PrimitiveInfo structure into a vector
666 % The format of the ConvertPrimitiveToPath method is:
668 % PathInfo *ConvertPrimitiveToPath(const DrawInfo *draw_info,
669 % const PrimitiveInfo *primitive_info)
671 % A description of each parameter follows:
673 % o Method ConvertPrimitiveToPath returns a vector path structure of type
676 % o draw_info: a structure of type DrawInfo.
678 % o primitive_info: Specifies a pointer to an PrimitiveInfo structure.
683 static void LogPathInfo(const PathInfo *path_info)
685 register const PathInfo
688 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin vector-path");
689 for (p=path_info; p->code != EndCode; p++)
690 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
691 " %g %g %s",p->point.x,p->point.y,p->code == GhostlineCode ?
692 "moveto ghostline" : p->code == OpenCode ? "moveto open" :
693 p->code == MoveToCode ? "moveto" : p->code == LineToCode ? "lineto" :
695 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end vector-path");
698 static PathInfo *ConvertPrimitiveToPath(
699 const DrawInfo *magick_unused(draw_info),const PrimitiveInfo *primitive_info)
720 Converts a PrimitiveInfo structure into a vector path structure.
722 switch (primitive_info->primitive)
729 return((PathInfo *) NULL);
733 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
734 path_info=(PathInfo *) AcquireQuantumMemory((size_t) (2UL*i+3UL),
736 if (path_info == (PathInfo *) NULL)
737 return((PathInfo *) NULL);
745 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
748 if (coordinates <= 0)
750 coordinates=(ssize_t) primitive_info[i].coordinates;
751 p=primitive_info[i].point;
757 Eliminate duplicate points.
759 if ((i == 0) || (fabs(q.x-primitive_info[i].point.x) > MagickEpsilon) ||
760 (fabs(q.y-primitive_info[i].point.y) > MagickEpsilon))
762 path_info[n].code=code;
763 path_info[n].point=primitive_info[i].point;
764 q=primitive_info[i].point;
769 if ((fabs(p.x-primitive_info[i].point.x) <= MagickEpsilon) &&
770 (fabs(p.y-primitive_info[i].point.y) <= MagickEpsilon))
773 Mark the p point as open if it does not match the q.
775 path_info[start].code=OpenCode;
776 path_info[n].code=GhostlineCode;
777 path_info[n].point=primitive_info[i].point;
779 path_info[n].code=LineToCode;
780 path_info[n].point=p;
783 path_info[n].code=EndCode;
784 path_info[n].point.x=0.0;
785 path_info[n].point.y=0.0;
786 if (IsEventLogging() != MagickFalse)
787 LogPathInfo(path_info);
792 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
796 % D e s t r o y D r a w I n f o %
800 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
802 % DestroyDrawInfo() deallocates memory associated with an DrawInfo
805 % The format of the DestroyDrawInfo method is:
807 % DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
809 % A description of each parameter follows:
811 % o draw_info: the draw info.
814 MagickExport DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
816 if (draw_info->debug != MagickFalse)
817 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
818 assert(draw_info != (DrawInfo *) NULL);
819 assert(draw_info->signature == MagickSignature);
820 if (draw_info->primitive != (char *) NULL)
821 draw_info->primitive=DestroyString(draw_info->primitive);
822 if (draw_info->text != (char *) NULL)
823 draw_info->text=DestroyString(draw_info->text);
824 if (draw_info->geometry != (char *) NULL)
825 draw_info->geometry=DestroyString(draw_info->geometry);
826 if (draw_info->tile != (Image *) NULL)
827 draw_info->tile=DestroyImage(draw_info->tile);
828 if (draw_info->fill_pattern != (Image *) NULL)
829 draw_info->fill_pattern=DestroyImage(draw_info->fill_pattern);
830 if (draw_info->stroke_pattern != (Image *) NULL)
831 draw_info->stroke_pattern=DestroyImage(draw_info->stroke_pattern);
832 if (draw_info->font != (char *) NULL)
833 draw_info->font=DestroyString(draw_info->font);
834 if (draw_info->metrics != (char *) NULL)
835 draw_info->metrics=DestroyString(draw_info->metrics);
836 if (draw_info->family != (char *) NULL)
837 draw_info->family=DestroyString(draw_info->family);
838 if (draw_info->encoding != (char *) NULL)
839 draw_info->encoding=DestroyString(draw_info->encoding);
840 if (draw_info->density != (char *) NULL)
841 draw_info->density=DestroyString(draw_info->density);
842 if (draw_info->server_name != (char *) NULL)
843 draw_info->server_name=(char *)
844 RelinquishMagickMemory(draw_info->server_name);
845 if (draw_info->dash_pattern != (double *) NULL)
846 draw_info->dash_pattern=(double *) RelinquishMagickMemory(
847 draw_info->dash_pattern);
848 if (draw_info->gradient.stops != (StopInfo *) NULL)
849 draw_info->gradient.stops=(StopInfo *) RelinquishMagickMemory(
850 draw_info->gradient.stops);
851 if (draw_info->clip_mask != (char *) NULL)
852 draw_info->clip_mask=DestroyString(draw_info->clip_mask);
853 draw_info->signature=(~MagickSignature);
854 draw_info=(DrawInfo *) RelinquishMagickMemory(draw_info);
859 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
863 + D e s t r o y E d g e %
867 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
869 % DestroyEdge() destroys the specified polygon edge.
871 % The format of the DestroyEdge method is:
873 % ssize_t DestroyEdge(PolygonInfo *polygon_info,const int edge)
875 % A description of each parameter follows:
877 % o polygon_info: Specifies a pointer to an PolygonInfo structure.
879 % o edge: the polygon edge number to destroy.
882 static size_t DestroyEdge(PolygonInfo *polygon_info,
885 assert(edge < polygon_info->number_edges);
886 polygon_info->edges[edge].points=(PointInfo *) RelinquishMagickMemory(
887 polygon_info->edges[edge].points);
888 polygon_info->number_edges--;
889 if (edge < polygon_info->number_edges)
890 (void) CopyMagickMemory(polygon_info->edges+edge,polygon_info->edges+edge+1,
891 (size_t) (polygon_info->number_edges-edge)*sizeof(*polygon_info->edges));
892 return(polygon_info->number_edges);
896 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
900 + D e s t r o y P o l y g o n I n f o %
904 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
906 % DestroyPolygonInfo() destroys the PolygonInfo data structure.
908 % The format of the DestroyPolygonInfo method is:
910 % PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
912 % A description of each parameter follows:
914 % o polygon_info: Specifies a pointer to an PolygonInfo structure.
917 static PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
922 for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
923 polygon_info->edges[i].points=(PointInfo *)
924 RelinquishMagickMemory(polygon_info->edges[i].points);
925 polygon_info->edges=(EdgeInfo *) RelinquishMagickMemory(polygon_info->edges);
926 return((PolygonInfo *) RelinquishMagickMemory(polygon_info));
930 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
934 % D r a w A f f i n e I m a g e %
938 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
940 % DrawAffineImage() composites the source over the destination image as
941 % dictated by the affine transform.
943 % The format of the DrawAffineImage method is:
945 % MagickBooleanType DrawAffineImage(Image *image,const Image *source,
946 % const AffineMatrix *affine)
948 % A description of each parameter follows:
950 % o image: the image.
952 % o source: the source image.
954 % o affine: the affine transform.
957 static SegmentInfo AffineEdge(const Image *image,const AffineMatrix *affine,
958 const double y,const SegmentInfo *edge)
971 Determine left and right edges.
973 inverse_edge.x1=edge->x1;
974 inverse_edge.y1=edge->y1;
975 inverse_edge.x2=edge->x2;
976 inverse_edge.y2=edge->y2;
977 z=affine->ry*y+affine->tx;
978 if (affine->sx > MagickEpsilon)
980 intercept=(-z/affine->sx);
981 x=intercept+MagickEpsilon;
982 if (x > inverse_edge.x1)
984 intercept=(-z+(double) image->columns)/affine->sx;
985 x=intercept-MagickEpsilon;
986 if (x < inverse_edge.x2)
990 if (affine->sx < -MagickEpsilon)
992 intercept=(-z+(double) image->columns)/affine->sx;
993 x=intercept+MagickEpsilon;
994 if (x > inverse_edge.x1)
996 intercept=(-z/affine->sx);
997 x=intercept-MagickEpsilon;
998 if (x < inverse_edge.x2)
1002 if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->columns))
1004 inverse_edge.x2=edge->x1;
1005 return(inverse_edge);
1008 Determine top and bottom edges.
1010 z=affine->sy*y+affine->ty;
1011 if (affine->rx > MagickEpsilon)
1013 intercept=(-z/affine->rx);
1014 x=intercept+MagickEpsilon;
1015 if (x > inverse_edge.x1)
1017 intercept=(-z+(double) image->rows)/affine->rx;
1018 x=intercept-MagickEpsilon;
1019 if (x < inverse_edge.x2)
1023 if (affine->rx < -MagickEpsilon)
1025 intercept=(-z+(double) image->rows)/affine->rx;
1026 x=intercept+MagickEpsilon;
1027 if (x > inverse_edge.x1)
1029 intercept=(-z/affine->rx);
1030 x=intercept-MagickEpsilon;
1031 if (x < inverse_edge.x2)
1035 if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->rows))
1037 inverse_edge.x2=edge->x2;
1038 return(inverse_edge);
1040 return(inverse_edge);
1043 static AffineMatrix InverseAffineMatrix(const AffineMatrix *affine)
1051 determinant=1.0/(affine->sx*affine->sy-affine->rx*affine->ry);
1052 inverse_affine.sx=determinant*affine->sy;
1053 inverse_affine.rx=determinant*(-affine->rx);
1054 inverse_affine.ry=determinant*(-affine->ry);
1055 inverse_affine.sy=determinant*affine->sx;
1056 inverse_affine.tx=(-affine->tx)*inverse_affine.sx-affine->ty*
1058 inverse_affine.ty=(-affine->tx)*inverse_affine.rx-affine->ty*
1060 return(inverse_affine);
1063 static inline ssize_t MagickAbsoluteValue(const ssize_t x)
1070 static inline double MagickMax(const double x,const double y)
1077 static inline double MagickMin(const double x,const double y)
1084 MagickExport MagickBooleanType DrawAffineImage(Image *image,
1085 const Image *source,const AffineMatrix *affine)
1119 Determine bounding box.
1121 assert(image != (Image *) NULL);
1122 assert(image->signature == MagickSignature);
1123 if (image->debug != MagickFalse)
1124 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1125 assert(source != (const Image *) NULL);
1126 assert(source->signature == MagickSignature);
1127 assert(affine != (AffineMatrix *) NULL);
1130 extent[1].x=(double) source->columns-1.0;
1132 extent[2].x=(double) source->columns-1.0;
1133 extent[2].y=(double) source->rows-1.0;
1135 extent[3].y=(double) source->rows-1.0;
1136 for (i=0; i < 4; i++)
1139 extent[i].x=point.x*affine->sx+point.y*affine->ry+affine->tx;
1140 extent[i].y=point.x*affine->rx+point.y*affine->sy+affine->ty;
1144 for (i=1; i < 4; i++)
1146 if (min.x > extent[i].x)
1148 if (min.y > extent[i].y)
1150 if (max.x < extent[i].x)
1152 if (max.y < extent[i].y)
1156 Affine transform image.
1158 if (SetImageStorageClass(image,DirectClass) == MagickFalse)
1159 return(MagickFalse);
1161 edge.x1=MagickMax(min.x,0.0);
1162 edge.y1=MagickMax(min.y,0.0);
1163 edge.x2=MagickMin(max.x,(double) image->columns-1.0);
1164 edge.y2=MagickMin(max.y,(double) image->rows-1.0);
1165 inverse_affine=InverseAffineMatrix(affine);
1166 GetMagickPixelPacket(image,&zero);
1167 exception=(&image->exception);
1168 image_view=AcquireCacheView(image);
1169 source_view=AcquireCacheView(source);
1170 #if defined(MAGICKCORE_OPENMP_SUPPORT)
1171 #pragma omp parallel for schedule(dynamic,4) shared(status)
1173 for (y=(ssize_t) ceil(edge.y1-0.5); y <= (ssize_t) floor(edge.y2+0.5); y++)
1182 register IndexPacket
1188 register PixelPacket
1197 inverse_edge=AffineEdge(source,&inverse_affine,(double) y,&edge);
1198 if (inverse_edge.x2 < inverse_edge.x1)
1200 q=GetCacheViewAuthenticPixels(image_view,(ssize_t) ceil(inverse_edge.x1-
1201 0.5),y,(size_t) ((ssize_t) floor(inverse_edge.x2+0.5)-(ssize_t) floor(
1202 inverse_edge.x1+0.5)+1),1,exception);
1203 if (q == (PixelPacket *) NULL)
1205 indexes=GetCacheViewAuthenticIndexQueue(image_view);
1209 for (x=(ssize_t) ceil(inverse_edge.x1-0.5); x <= (ssize_t) floor(inverse_edge.x2+0.5); x++)
1211 point.x=(double) x*inverse_affine.sx+y*inverse_affine.ry+
1213 point.y=(double) x*inverse_affine.rx+y*inverse_affine.sy+
1215 (void) InterpolateMagickPixelPacket(source,source_view,
1216 UndefinedInterpolatePixel,point.x,point.y,&pixel,exception);
1217 SetMagickPixelPacket(image,q,indexes+x_offset,&composite);
1218 MagickPixelCompositeOver(&pixel,pixel.opacity,&composite,
1219 composite.opacity,&composite);
1220 SetPixelPacket(image,&composite,q,indexes+x_offset);
1224 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
1227 source_view=DestroyCacheView(source_view);
1228 image_view=DestroyCacheView(image_view);
1233 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1237 + D r a w B o u n d i n g R e c t a n g l e s %
1241 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1243 % DrawBoundingRectangles() draws the bounding rectangles on the image. This
1244 % is only useful for developers debugging the rendering algorithm.
1246 % The format of the DrawBoundingRectangles method is:
1248 % void DrawBoundingRectangles(Image *image,const DrawInfo *draw_info,
1249 % PolygonInfo *polygon_info)
1251 % A description of each parameter follows:
1253 % o image: the image.
1255 % o draw_info: the draw info.
1257 % o polygon_info: Specifies a pointer to a PolygonInfo structure.
1260 static void DrawBoundingRectangles(Image *image,const DrawInfo *draw_info,
1261 const PolygonInfo *polygon_info)
1286 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1287 (void) QueryColorDatabase("#0000",&clone_info->fill,&image->exception);
1288 resolution.x=DefaultResolution;
1289 resolution.y=DefaultResolution;
1290 if (clone_info->density != (char *) NULL)
1298 flags=ParseGeometry(clone_info->density,&geometry_info);
1299 resolution.x=geometry_info.rho;
1300 resolution.y=geometry_info.sigma;
1301 if ((flags & SigmaValue) == MagickFalse)
1302 resolution.y=resolution.x;
1304 mid=(resolution.x/72.0)*ExpandAffine(&clone_info->affine)*
1305 clone_info->stroke_width/2.0;
1310 if (polygon_info != (PolygonInfo *) NULL)
1312 bounds=polygon_info->edges[0].bounds;
1313 for (i=1; i < (ssize_t) polygon_info->number_edges; i++)
1315 if (polygon_info->edges[i].bounds.x1 < (double) bounds.x1)
1316 bounds.x1=polygon_info->edges[i].bounds.x1;
1317 if (polygon_info->edges[i].bounds.y1 < (double) bounds.y1)
1318 bounds.y1=polygon_info->edges[i].bounds.y1;
1319 if (polygon_info->edges[i].bounds.x2 > (double) bounds.x2)
1320 bounds.x2=polygon_info->edges[i].bounds.x2;
1321 if (polygon_info->edges[i].bounds.y2 > (double) bounds.y2)
1322 bounds.y2=polygon_info->edges[i].bounds.y2;
1325 bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double)
1326 image->columns ? (double) image->columns-1 : bounds.x1;
1328 bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double)
1329 image->rows ? (double) image->rows-1 : bounds.y1;
1331 bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double)
1332 image->columns ? (double) image->columns-1 : bounds.x2;
1334 bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double)
1335 image->rows ? (double) image->rows-1 : bounds.y2;
1336 for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
1338 if (polygon_info->edges[i].direction != 0)
1339 (void) QueryColorDatabase("red",&clone_info->stroke,
1342 (void) QueryColorDatabase("green",&clone_info->stroke,
1344 start.x=(double) (polygon_info->edges[i].bounds.x1-mid);
1345 start.y=(double) (polygon_info->edges[i].bounds.y1-mid);
1346 end.x=(double) (polygon_info->edges[i].bounds.x2+mid);
1347 end.y=(double) (polygon_info->edges[i].bounds.y2+mid);
1348 primitive_info[0].primitive=RectanglePrimitive;
1349 TraceRectangle(primitive_info,start,end);
1350 primitive_info[0].method=ReplaceMethod;
1351 coordinates=(ssize_t) primitive_info[0].coordinates;
1352 primitive_info[coordinates].primitive=UndefinedPrimitive;
1353 (void) DrawPrimitive(image,clone_info,primitive_info);
1356 (void) QueryColorDatabase("blue",&clone_info->stroke,&image->exception);
1357 start.x=(double) (bounds.x1-mid);
1358 start.y=(double) (bounds.y1-mid);
1359 end.x=(double) (bounds.x2+mid);
1360 end.y=(double) (bounds.y2+mid);
1361 primitive_info[0].primitive=RectanglePrimitive;
1362 TraceRectangle(primitive_info,start,end);
1363 primitive_info[0].method=ReplaceMethod;
1364 coordinates=(ssize_t) primitive_info[0].coordinates;
1365 primitive_info[coordinates].primitive=UndefinedPrimitive;
1366 (void) DrawPrimitive(image,clone_info,primitive_info);
1367 clone_info=DestroyDrawInfo(clone_info);
1371 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1375 % D r a w C l i p P a t h %
1379 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1381 % DrawClipPath() draws the clip path on the image mask.
1383 % The format of the DrawClipPath method is:
1385 % MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info,
1388 % A description of each parameter follows:
1390 % o image: the image.
1392 % o draw_info: the draw info.
1394 % o name: the name of the clip path.
1397 MagickExport MagickBooleanType DrawClipPath(Image *image,
1398 const DrawInfo *draw_info,const char *name)
1401 clip_mask[MaxTextExtent];
1412 assert(image != (Image *) NULL);
1413 assert(image->signature == MagickSignature);
1414 if (image->debug != MagickFalse)
1415 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1416 assert(draw_info != (const DrawInfo *) NULL);
1417 (void) FormatMagickString(clip_mask,MaxTextExtent,"%s",name);
1418 value=GetImageArtifact(image,clip_mask);
1419 if (value == (const char *) NULL)
1420 return(MagickFalse);
1421 if (image->clip_mask == (Image *) NULL)
1426 clip_mask=CloneImage(image,image->columns,image->rows,MagickTrue,
1428 if (clip_mask == (Image *) NULL)
1429 return(MagickFalse);
1430 (void) SetImageClipMask(image,clip_mask);
1431 clip_mask=DestroyImage(clip_mask);
1433 (void) QueryColorDatabase("#00000000",&image->clip_mask->background_color,
1435 image->clip_mask->background_color.opacity=(Quantum) TransparentOpacity;
1436 (void) SetImageBackgroundColor(image->clip_mask);
1437 if (image->debug != MagickFalse)
1438 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin clip-path %s",
1439 draw_info->clip_mask);
1440 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1441 (void) CloneString(&clone_info->primitive,value);
1442 (void) QueryColorDatabase("#ffffff",&clone_info->fill,&image->exception);
1443 clone_info->clip_mask=(char *) NULL;
1444 status=DrawImage(image->clip_mask,clone_info);
1445 status|=NegateImage(image->clip_mask,MagickFalse);
1446 clone_info=DestroyDrawInfo(clone_info);
1447 if (image->debug != MagickFalse)
1448 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end clip-path");
1449 return(status != 0 ? MagickTrue : MagickFalse);
1453 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1457 + D r a w D a s h P o l y g o n %
1461 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1463 % DrawDashPolygon() draws a dashed polygon (line, rectangle, ellipse) on the
1464 % image while respecting the dash offset and dash pattern attributes.
1466 % The format of the DrawDashPolygon method is:
1468 % MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1469 % const PrimitiveInfo *primitive_info,Image *image)
1471 % A description of each parameter follows:
1473 % o draw_info: the draw info.
1475 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
1477 % o image: the image.
1481 static MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
1482 const PrimitiveInfo *primitive_info,Image *image)
1503 register MagickRealType
1514 assert(draw_info != (const DrawInfo *) NULL);
1515 if (image->debug != MagickFalse)
1516 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-dash");
1517 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1518 clone_info->miterlimit=0;
1519 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
1520 number_vertices=(size_t) i;
1521 dash_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
1522 (2UL*number_vertices+1UL),sizeof(*dash_polygon));
1523 if (dash_polygon == (PrimitiveInfo *) NULL)
1524 return(MagickFalse);
1525 dash_polygon[0]=primitive_info[0];
1526 scale=ExpandAffine(&draw_info->affine);
1527 length=scale*(draw_info->dash_pattern[0]-0.5);
1528 offset=draw_info->dash_offset != 0.0 ? scale*draw_info->dash_offset : 0.0;
1530 for (n=0; offset > 0.0; j=0)
1532 if (draw_info->dash_pattern[n] <= 0.0)
1534 length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1535 if (offset > length)
1539 length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1542 if (offset < length)
1554 for (i=1; i < (ssize_t) number_vertices; i++)
1556 dx=primitive_info[i].point.x-primitive_info[i-1].point.x;
1557 dy=primitive_info[i].point.y-primitive_info[i-1].point.y;
1558 maximum_length=hypot((double) dx,dy);
1562 if (draw_info->dash_pattern[n] == 0.0)
1564 length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1566 for (total_length=0.0; (total_length+length) < maximum_length; )
1568 total_length+=length;
1569 if ((n & 0x01) != 0)
1571 dash_polygon[0]=primitive_info[0];
1572 dash_polygon[0].point.x=(double) (primitive_info[i-1].point.x+dx*
1573 total_length/maximum_length);
1574 dash_polygon[0].point.y=(double) (primitive_info[i-1].point.y+dy*
1575 total_length/maximum_length);
1580 if ((j+1) > (ssize_t) (2*number_vertices))
1582 dash_polygon[j]=primitive_info[i-1];
1583 dash_polygon[j].point.x=(double) (primitive_info[i-1].point.x+dx*
1584 total_length/maximum_length);
1585 dash_polygon[j].point.y=(double) (primitive_info[i-1].point.y+dy*
1586 total_length/maximum_length);
1587 dash_polygon[j].coordinates=1;
1589 dash_polygon[0].coordinates=(size_t) j;
1590 dash_polygon[j].primitive=UndefinedPrimitive;
1591 status|=DrawStrokePolygon(image,clone_info,dash_polygon);
1594 if (draw_info->dash_pattern[n] == 0.0)
1596 length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
1598 length-=(maximum_length-total_length);
1599 if ((n & 0x01) != 0)
1601 dash_polygon[j]=primitive_info[i];
1602 dash_polygon[j].coordinates=1;
1605 if ((total_length < maximum_length) && ((n & 0x01) == 0) && (j > 1))
1607 dash_polygon[j]=primitive_info[i-1];
1608 dash_polygon[j].point.x+=MagickEpsilon;
1609 dash_polygon[j].point.y+=MagickEpsilon;
1610 dash_polygon[j].coordinates=1;
1612 dash_polygon[0].coordinates=(size_t) j;
1613 dash_polygon[j].primitive=UndefinedPrimitive;
1614 status|=DrawStrokePolygon(image,clone_info,dash_polygon);
1616 dash_polygon=(PrimitiveInfo *) RelinquishMagickMemory(dash_polygon);
1617 clone_info=DestroyDrawInfo(clone_info);
1618 if (image->debug != MagickFalse)
1619 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-dash");
1620 return(status != 0 ? MagickTrue : MagickFalse);
1624 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1628 % D r a w I m a g e %
1632 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1634 % DrawImage() draws a graphic primitive on your image. The primitive
1635 % may be represented as a string or filename. Precede the filename with an
1636 % "at" sign (@) and the contents of the file are drawn on the image. You
1637 % can affect how text is drawn by setting one or more members of the draw
1640 % The format of the DrawImage method is:
1642 % MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
1644 % A description of each parameter follows:
1646 % o image: the image.
1648 % o draw_info: the draw info.
1652 static inline MagickBooleanType IsPoint(const char *point)
1660 value=StringToDouble(point,&p);
1661 return((value == 0.0) && (p == point) ? MagickFalse : MagickTrue);
1664 static inline void TracePoint(PrimitiveInfo *primitive_info,
1665 const PointInfo point)
1667 primitive_info->coordinates=1;
1668 primitive_info->point=point;
1671 MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info)
1673 #define RenderImageTag "Render/Image"
1680 key[2*MaxTextExtent],
1681 keyword[MaxTextExtent],
1682 geometry[MaxTextExtent],
1683 name[MaxTextExtent],
1684 pattern[MaxTextExtent],
1735 Ensure the annotation info is valid.
1737 assert(image != (Image *) NULL);
1738 assert(image->signature == MagickSignature);
1739 if (image->debug != MagickFalse)
1740 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1741 assert(draw_info != (DrawInfo *) NULL);
1742 assert(draw_info->signature == MagickSignature);
1743 if (image->debug != MagickFalse)
1744 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
1745 if ((draw_info->primitive == (char *) NULL) ||
1746 (*draw_info->primitive == '\0'))
1747 return(MagickFalse);
1748 if (image->debug != MagickFalse)
1749 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"begin draw-image");
1750 if (*draw_info->primitive != '@')
1751 primitive=AcquireString(draw_info->primitive);
1753 primitive=FileToString(draw_info->primitive+1,~0,&image->exception);
1754 if (primitive == (char *) NULL)
1755 return(MagickFalse);
1756 primitive_extent=(MagickRealType) strlen(primitive);
1757 (void) SetImageArtifact(image,"MVG",primitive);
1760 Allocate primitive info memory.
1762 graphic_context=(DrawInfo **) AcquireMagickMemory(
1763 sizeof(*graphic_context));
1764 if (graphic_context == (DrawInfo **) NULL)
1766 primitive=DestroyString(primitive);
1767 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
1771 primitive_info=(PrimitiveInfo *) AcquireQuantumMemory((size_t) number_points,
1772 sizeof(*primitive_info));
1773 if (primitive_info == (PrimitiveInfo *) NULL)
1775 primitive=DestroyString(primitive);
1776 for ( ; n >= 0; n--)
1777 graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
1778 graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
1779 ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
1782 graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,draw_info);
1783 graphic_context[n]->viewbox=image->page;
1784 if ((image->page.width == 0) || (image->page.height == 0))
1786 graphic_context[n]->viewbox.width=image->columns;
1787 graphic_context[n]->viewbox.height=image->rows;
1789 token=AcquireString(primitive);
1790 (void) QueryColorDatabase("#000000",&start_color,&image->exception);
1791 if (SetImageStorageClass(image,DirectClass) == MagickFalse)
1792 return(MagickFalse);
1794 for (q=primitive; *q != '\0'; )
1797 Interpret graphic primitive.
1799 GetMagickToken(q,&q,keyword);
1800 if (*keyword == '\0')
1802 if (*keyword == '#')
1807 while ((*q != '\n') && (*q != '\0'))
1811 p=q-strlen(keyword)-1;
1812 primitive_type=UndefinedPrimitive;
1813 current=graphic_context[n]->affine;
1814 GetAffineMatrix(&affine);
1822 if (LocaleCompare("affine",keyword) == 0)
1824 GetMagickToken(q,&q,token);
1825 affine.sx=StringToDouble(token,(char **) NULL);
1826 GetMagickToken(q,&q,token);
1828 GetMagickToken(q,&q,token);
1829 affine.rx=StringToDouble(token,(char **) NULL);
1830 GetMagickToken(q,&q,token);
1832 GetMagickToken(q,&q,token);
1833 affine.ry=StringToDouble(token,(char **) NULL);
1834 GetMagickToken(q,&q,token);
1836 GetMagickToken(q,&q,token);
1837 affine.sy=StringToDouble(token,(char **) NULL);
1838 GetMagickToken(q,&q,token);
1840 GetMagickToken(q,&q,token);
1841 affine.tx=StringToDouble(token,(char **) NULL);
1842 GetMagickToken(q,&q,token);
1844 GetMagickToken(q,&q,token);
1845 affine.ty=StringToDouble(token,(char **) NULL);
1848 if (LocaleCompare("arc",keyword) == 0)
1850 primitive_type=ArcPrimitive;
1859 if (LocaleCompare("bezier",keyword) == 0)
1861 primitive_type=BezierPrimitive;
1864 if (LocaleCompare("border-color",keyword) == 0)
1866 GetMagickToken(q,&q,token);
1867 (void) QueryColorDatabase(token,&graphic_context[n]->border_color,
1877 if (LocaleCompare("clip-path",keyword) == 0)
1882 GetMagickToken(q,&q,token);
1883 (void) CloneString(&graphic_context[n]->clip_mask,token);
1884 (void) DrawClipPath(image,graphic_context[n],
1885 graphic_context[n]->clip_mask);
1888 if (LocaleCompare("clip-rule",keyword) == 0)
1893 GetMagickToken(q,&q,token);
1894 fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
1896 if (fill_rule == -1)
1901 graphic_context[n]->fill_rule=(FillRule) fill_rule;
1904 if (LocaleCompare("clip-units",keyword) == 0)
1909 GetMagickToken(q,&q,token);
1910 clip_units=ParseCommandOption(MagickClipPathOptions,MagickFalse,
1912 if (clip_units == -1)
1917 graphic_context[n]->clip_units=(ClipPathUnits) clip_units;
1918 if (clip_units == ObjectBoundingBox)
1920 GetAffineMatrix(¤t);
1921 affine.sx=draw_info->bounds.x2;
1922 affine.sy=draw_info->bounds.y2;
1923 affine.tx=draw_info->bounds.x1;
1924 affine.ty=draw_info->bounds.y1;
1929 if (LocaleCompare("circle",keyword) == 0)
1931 primitive_type=CirclePrimitive;
1934 if (LocaleCompare("color",keyword) == 0)
1936 primitive_type=ColorPrimitive;
1945 if (LocaleCompare("decorate",keyword) == 0)
1950 GetMagickToken(q,&q,token);
1951 decorate=ParseCommandOption(MagickDecorateOptions,MagickFalse,
1958 graphic_context[n]->decorate=(DecorationType) decorate;
1967 if (LocaleCompare("ellipse",keyword) == 0)
1969 primitive_type=EllipsePrimitive;
1972 if (LocaleCompare("encoding",keyword) == 0)
1974 GetMagickToken(q,&q,token);
1975 (void) CloneString(&graphic_context[n]->encoding,token);
1984 if (LocaleCompare("fill",keyword) == 0)
1986 GetMagickToken(q,&q,token);
1987 (void) FormatMagickString(pattern,MaxTextExtent,"%s",token);
1988 if (GetImageArtifact(image,pattern) != (const char *) NULL)
1989 (void) DrawPatternPath(image,draw_info,token,
1990 &graphic_context[n]->fill_pattern);
1993 status=QueryColorDatabase(token,&graphic_context[n]->fill,
1995 if (status == MagickFalse)
2000 pattern_info=AcquireImageInfo();
2001 (void) CopyMagickString(pattern_info->filename,token,
2003 graphic_context[n]->fill_pattern=
2004 ReadImage(pattern_info,&image->exception);
2005 CatchException(&image->exception);
2006 pattern_info=DestroyImageInfo(pattern_info);
2011 if (LocaleCompare("fill-opacity",keyword) == 0)
2013 GetMagickToken(q,&q,token);
2014 factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2015 graphic_context[n]->fill.opacity=ClampToQuantum((MagickRealType)
2016 QuantumRange*(1.0-factor*StringToDouble(token,(char **) NULL)));
2019 if (LocaleCompare("fill-rule",keyword) == 0)
2024 GetMagickToken(q,&q,token);
2025 fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
2027 if (fill_rule == -1)
2032 graphic_context[n]->fill_rule=(FillRule) fill_rule;
2035 if (LocaleCompare("font",keyword) == 0)
2037 GetMagickToken(q,&q,token);
2038 (void) CloneString(&graphic_context[n]->font,token);
2039 if (LocaleCompare("none",token) == 0)
2040 graphic_context[n]->font=(char *)
2041 RelinquishMagickMemory(graphic_context[n]->font);
2044 if (LocaleCompare("font-family",keyword) == 0)
2046 GetMagickToken(q,&q,token);
2047 (void) CloneString(&graphic_context[n]->family,token);
2050 if (LocaleCompare("font-size",keyword) == 0)
2052 GetMagickToken(q,&q,token);
2053 graphic_context[n]->pointsize=StringToDouble(token,(char **) NULL);
2056 if (LocaleCompare("font-stretch",keyword) == 0)
2061 GetMagickToken(q,&q,token);
2062 stretch=ParseCommandOption(MagickStretchOptions,MagickFalse,token);
2068 graphic_context[n]->stretch=(StretchType) stretch;
2071 if (LocaleCompare("font-style",keyword) == 0)
2076 GetMagickToken(q,&q,token);
2077 style=ParseCommandOption(MagickStyleOptions,MagickFalse,token);
2083 graphic_context[n]->style=(StyleType) style;
2086 if (LocaleCompare("font-weight",keyword) == 0)
2088 GetMagickToken(q,&q,token);
2089 graphic_context[n]->weight=StringToUnsignedLong(token);
2090 if (LocaleCompare(token,"all") == 0)
2091 graphic_context[n]->weight=0;
2092 if (LocaleCompare(token,"bold") == 0)
2093 graphic_context[n]->weight=700;
2094 if (LocaleCompare(token,"bolder") == 0)
2095 if (graphic_context[n]->weight <= 800)
2096 graphic_context[n]->weight+=100;
2097 if (LocaleCompare(token,"lighter") == 0)
2098 if (graphic_context[n]->weight >= 100)
2099 graphic_context[n]->weight-=100;
2100 if (LocaleCompare(token,"normal") == 0)
2101 graphic_context[n]->weight=400;
2110 if (LocaleCompare("gradient-units",keyword) == 0)
2112 GetMagickToken(q,&q,token);
2115 if (LocaleCompare("gravity",keyword) == 0)
2120 GetMagickToken(q,&q,token);
2121 gravity=ParseCommandOption(MagickGravityOptions,MagickFalse,token);
2127 graphic_context[n]->gravity=(GravityType) gravity;
2136 if (LocaleCompare("image",keyword) == 0)
2141 primitive_type=ImagePrimitive;
2142 GetMagickToken(q,&q,token);
2143 compose=ParseCommandOption(MagickComposeOptions,MagickFalse,token);
2149 graphic_context[n]->compose=(CompositeOperator) compose;
2152 if (LocaleCompare("interline-spacing",keyword) == 0)
2154 GetMagickToken(q,&q,token);
2155 graphic_context[n]->interline_spacing=StringToDouble(token,(char **) NULL);
2158 if (LocaleCompare("interword-spacing",keyword) == 0)
2160 GetMagickToken(q,&q,token);
2161 graphic_context[n]->interword_spacing=StringToDouble(token,(char **) NULL);
2170 if (LocaleCompare("kerning",keyword) == 0)
2172 GetMagickToken(q,&q,token);
2173 graphic_context[n]->kerning=StringToDouble(token,(char **) NULL);
2182 if (LocaleCompare("line",keyword) == 0)
2184 primitive_type=LinePrimitive;
2193 if (LocaleCompare("matte",keyword) == 0)
2195 primitive_type=MattePrimitive;
2204 if (LocaleCompare("offset",keyword) == 0)
2206 GetMagickToken(q,&q,token);
2209 if (LocaleCompare("opacity",keyword) == 0)
2211 GetMagickToken(q,&q,token);
2212 factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2213 graphic_context[n]->opacity=ClampToQuantum((MagickRealType)
2214 QuantumRange*(1.0-((1.0-QuantumScale*graphic_context[n]->opacity)*
2215 factor*StringToDouble(token,(char **) NULL))));
2216 graphic_context[n]->fill.opacity=graphic_context[n]->opacity;
2217 graphic_context[n]->stroke.opacity=graphic_context[n]->opacity;
2226 if (LocaleCompare("path",keyword) == 0)
2228 primitive_type=PathPrimitive;
2231 if (LocaleCompare("point",keyword) == 0)
2233 primitive_type=PointPrimitive;
2236 if (LocaleCompare("polyline",keyword) == 0)
2238 primitive_type=PolylinePrimitive;
2241 if (LocaleCompare("polygon",keyword) == 0)
2243 primitive_type=PolygonPrimitive;
2246 if (LocaleCompare("pop",keyword) == 0)
2248 GetMagickToken(q,&q,token);
2249 if (LocaleCompare("clip-path",token) == 0)
2251 if (LocaleCompare("defs",token) == 0)
2253 if (LocaleCompare("gradient",token) == 0)
2255 if (LocaleCompare("graphic-context",token) == 0)
2259 (void) ThrowMagickException(&image->exception,
2260 GetMagickModule(),DrawError,
2261 "UnbalancedGraphicContextPushPop","`%s'",token);
2265 if (graphic_context[n]->clip_mask != (char *) NULL)
2266 if (LocaleCompare(graphic_context[n]->clip_mask,
2267 graphic_context[n-1]->clip_mask) != 0)
2268 (void) SetImageClipMask(image,(Image *) NULL);
2269 graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
2273 if (LocaleCompare("pattern",token) == 0)
2278 if (LocaleCompare("push",keyword) == 0)
2280 GetMagickToken(q,&q,token);
2281 if (LocaleCompare("clip-path",token) == 0)
2284 name[MaxTextExtent];
2286 GetMagickToken(q,&q,token);
2287 (void) FormatMagickString(name,MaxTextExtent,"%s",token);
2288 for (p=q; *q != '\0'; )
2290 GetMagickToken(q,&q,token);
2291 if (LocaleCompare(token,"pop") != 0)
2293 GetMagickToken(q,(const char **) NULL,token);
2294 if (LocaleCompare(token,"clip-path") != 0)
2298 (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2299 (void) SetImageArtifact(image,name,token);
2300 GetMagickToken(q,&q,token);
2303 if (LocaleCompare("gradient",token) == 0)
2306 key[2*MaxTextExtent],
2307 name[MaxTextExtent],
2308 type[MaxTextExtent];
2313 GetMagickToken(q,&q,token);
2314 (void) CopyMagickString(name,token,MaxTextExtent);
2315 GetMagickToken(q,&q,token);
2316 (void) CopyMagickString(type,token,MaxTextExtent);
2317 GetMagickToken(q,&q,token);
2318 segment.x1=StringToDouble(token,(char **) NULL);
2319 GetMagickToken(q,&q,token);
2321 GetMagickToken(q,&q,token);
2322 segment.y1=StringToDouble(token,(char **) NULL);
2323 GetMagickToken(q,&q,token);
2325 GetMagickToken(q,&q,token);
2326 segment.x2=StringToDouble(token,(char **) NULL);
2327 GetMagickToken(q,&q,token);
2329 GetMagickToken(q,&q,token);
2330 segment.y2=StringToDouble(token,(char **) NULL);
2331 if (LocaleCompare(type,"radial") == 0)
2333 GetMagickToken(q,&q,token);
2335 GetMagickToken(q,&q,token);
2337 for (p=q; *q != '\0'; )
2339 GetMagickToken(q,&q,token);
2340 if (LocaleCompare(token,"pop") != 0)
2342 GetMagickToken(q,(const char **) NULL,token);
2343 if (LocaleCompare(token,"gradient") != 0)
2347 (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2348 bounds.x1=graphic_context[n]->affine.sx*segment.x1+
2349 graphic_context[n]->affine.ry*segment.y1+
2350 graphic_context[n]->affine.tx;
2351 bounds.y1=graphic_context[n]->affine.rx*segment.x1+
2352 graphic_context[n]->affine.sy*segment.y1+
2353 graphic_context[n]->affine.ty;
2354 bounds.x2=graphic_context[n]->affine.sx*segment.x2+
2355 graphic_context[n]->affine.ry*segment.y2+
2356 graphic_context[n]->affine.tx;
2357 bounds.y2=graphic_context[n]->affine.rx*segment.x2+
2358 graphic_context[n]->affine.sy*segment.y2+
2359 graphic_context[n]->affine.ty;
2360 (void) FormatMagickString(key,MaxTextExtent,"%s",name);
2361 (void) SetImageArtifact(image,key,token);
2362 (void) FormatMagickString(key,MaxTextExtent,"%s-geometry",name);
2363 (void) FormatMagickString(geometry,MaxTextExtent,
2364 "%gx%g%+.15g%+.15g",
2365 MagickMax(fabs(bounds.x2-bounds.x1+1.0),1.0),
2366 MagickMax(fabs(bounds.y2-bounds.y1+1.0),1.0),
2367 bounds.x1,bounds.y1);
2368 (void) SetImageArtifact(image,key,geometry);
2369 GetMagickToken(q,&q,token);
2372 if (LocaleCompare("pattern",token) == 0)
2377 GetMagickToken(q,&q,token);
2378 (void) CopyMagickString(name,token,MaxTextExtent);
2379 GetMagickToken(q,&q,token);
2380 bounds.x=(ssize_t) ceil(StringToDouble(token,(char **) NULL)-0.5);
2381 GetMagickToken(q,&q,token);
2383 GetMagickToken(q,&q,token);
2384 bounds.y=(ssize_t) ceil(StringToDouble(token,(char **) NULL)-0.5);
2385 GetMagickToken(q,&q,token);
2387 GetMagickToken(q,&q,token);
2388 bounds.width=(size_t) floor(StringToDouble(token,(char **) NULL)+0.5);
2389 GetMagickToken(q,&q,token);
2391 GetMagickToken(q,&q,token);
2392 bounds.height=(size_t) floor(StringToDouble(token,(char **) NULL)+0.5);
2393 for (p=q; *q != '\0'; )
2395 GetMagickToken(q,&q,token);
2396 if (LocaleCompare(token,"pop") != 0)
2398 GetMagickToken(q,(const char **) NULL,token);
2399 if (LocaleCompare(token,"pattern") != 0)
2403 (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
2404 (void) FormatMagickString(key,MaxTextExtent,"%s",name);
2405 (void) SetImageArtifact(image,key,token);
2406 (void) FormatMagickString(key,MaxTextExtent,"%s-geometry",name);
2407 (void) FormatMagickString(geometry,MaxTextExtent,
2408 "%.20gx%.20g%+.20g%+.20g",(double) bounds.width,(double)
2409 bounds.height,(double) bounds.x,(double) bounds.y);
2410 (void) SetImageArtifact(image,key,geometry);
2411 GetMagickToken(q,&q,token);
2414 if (LocaleCompare("graphic-context",token) == 0)
2417 graphic_context=(DrawInfo **) ResizeQuantumMemory(
2418 graphic_context,(size_t) (n+1),sizeof(*graphic_context));
2419 if (graphic_context == (DrawInfo **) NULL)
2421 (void) ThrowMagickException(&image->exception,
2422 GetMagickModule(),ResourceLimitError,
2423 "MemoryAllocationFailed","`%s'",image->filename);
2426 graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,
2427 graphic_context[n-1]);
2430 if (LocaleCompare("defs",token) == 0)
2441 if (LocaleCompare("rectangle",keyword) == 0)
2443 primitive_type=RectanglePrimitive;
2446 if (LocaleCompare("rotate",keyword) == 0)
2448 GetMagickToken(q,&q,token);
2449 angle=StringToDouble(token,(char **) NULL);
2450 affine.sx=cos(DegreesToRadians(fmod((double) angle,360.0)));
2451 affine.rx=sin(DegreesToRadians(fmod((double) angle,360.0)));
2452 affine.ry=(-sin(DegreesToRadians(fmod((double) angle,360.0))));
2453 affine.sy=cos(DegreesToRadians(fmod((double) angle,360.0)));
2456 if (LocaleCompare("roundRectangle",keyword) == 0)
2458 primitive_type=RoundRectanglePrimitive;
2467 if (LocaleCompare("scale",keyword) == 0)
2469 GetMagickToken(q,&q,token);
2470 affine.sx=StringToDouble(token,(char **) NULL);
2471 GetMagickToken(q,&q,token);
2473 GetMagickToken(q,&q,token);
2474 affine.sy=StringToDouble(token,(char **) NULL);
2477 if (LocaleCompare("skewX",keyword) == 0)
2479 GetMagickToken(q,&q,token);
2480 angle=StringToDouble(token,(char **) NULL);
2481 affine.ry=sin(DegreesToRadians(angle));
2484 if (LocaleCompare("skewY",keyword) == 0)
2486 GetMagickToken(q,&q,token);
2487 angle=StringToDouble(token,(char **) NULL);
2488 affine.rx=(-tan(DegreesToRadians(angle)/2.0));
2491 if (LocaleCompare("stop-color",keyword) == 0)
2496 GetMagickToken(q,&q,token);
2497 (void) QueryColorDatabase(token,&stop_color,&image->exception);
2498 (void) GradientImage(image,LinearGradient,ReflectSpread,
2499 &start_color,&stop_color);
2500 start_color=stop_color;
2501 GetMagickToken(q,&q,token);
2504 if (LocaleCompare("stroke",keyword) == 0)
2506 GetMagickToken(q,&q,token);
2507 (void) FormatMagickString(pattern,MaxTextExtent,"%s",token);
2508 if (GetImageArtifact(image,pattern) != (const char *) NULL)
2509 (void) DrawPatternPath(image,draw_info,token,
2510 &graphic_context[n]->stroke_pattern);
2513 status=QueryColorDatabase(token,&graphic_context[n]->stroke,
2515 if (status == MagickFalse)
2520 pattern_info=AcquireImageInfo();
2521 (void) CopyMagickString(pattern_info->filename,token,
2523 graphic_context[n]->stroke_pattern=
2524 ReadImage(pattern_info,&image->exception);
2525 CatchException(&image->exception);
2526 pattern_info=DestroyImageInfo(pattern_info);
2531 if (LocaleCompare("stroke-antialias",keyword) == 0)
2533 GetMagickToken(q,&q,token);
2534 graphic_context[n]->stroke_antialias=
2535 StringToLong(token) != 0 ? MagickTrue : MagickFalse;
2538 if (LocaleCompare("stroke-dasharray",keyword) == 0)
2540 if (graphic_context[n]->dash_pattern != (double *) NULL)
2541 graphic_context[n]->dash_pattern=(double *)
2542 RelinquishMagickMemory(graphic_context[n]->dash_pattern);
2543 if (IsPoint(q) != MagickFalse)
2549 GetMagickToken(p,&p,token);
2551 GetMagickToken(p,&p,token);
2552 for (x=0; IsPoint(token) != MagickFalse; x++)
2554 GetMagickToken(p,&p,token);
2556 GetMagickToken(p,&p,token);
2558 graphic_context[n]->dash_pattern=(double *)
2559 AcquireQuantumMemory((size_t) (2UL*x+1UL),
2560 sizeof(*graphic_context[n]->dash_pattern));
2561 if (graphic_context[n]->dash_pattern == (double *) NULL)
2563 (void) ThrowMagickException(&image->exception,
2564 GetMagickModule(),ResourceLimitError,
2565 "MemoryAllocationFailed","`%s'",image->filename);
2568 for (j=0; j < x; j++)
2570 GetMagickToken(q,&q,token);
2572 GetMagickToken(q,&q,token);
2573 graphic_context[n]->dash_pattern[j]=StringToDouble(token,(char **) NULL);
2575 if ((x & 0x01) != 0)
2576 for ( ; j < (2*x); j++)
2577 graphic_context[n]->dash_pattern[j]=
2578 graphic_context[n]->dash_pattern[j-x];
2579 graphic_context[n]->dash_pattern[j]=0.0;
2582 GetMagickToken(q,&q,token);
2585 if (LocaleCompare("stroke-dashoffset",keyword) == 0)
2587 GetMagickToken(q,&q,token);
2588 graphic_context[n]->dash_offset=StringToDouble(token,(char **) NULL);
2591 if (LocaleCompare("stroke-linecap",keyword) == 0)
2596 GetMagickToken(q,&q,token);
2597 linecap=ParseCommandOption(MagickLineCapOptions,MagickFalse,token);
2603 graphic_context[n]->linecap=(LineCap) linecap;
2606 if (LocaleCompare("stroke-linejoin",keyword) == 0)
2611 GetMagickToken(q,&q,token);
2612 linejoin=ParseCommandOption(MagickLineJoinOptions,MagickFalse,token);
2618 graphic_context[n]->linejoin=(LineJoin) linejoin;
2621 if (LocaleCompare("stroke-miterlimit",keyword) == 0)
2623 GetMagickToken(q,&q,token);
2624 graphic_context[n]->miterlimit=StringToUnsignedLong(token);
2627 if (LocaleCompare("stroke-opacity",keyword) == 0)
2629 GetMagickToken(q,&q,token);
2630 factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
2631 graphic_context[n]->stroke.opacity=ClampToQuantum((MagickRealType)
2632 QuantumRange*(1.0-factor*StringToDouble(token,(char **) NULL)));
2635 if (LocaleCompare("stroke-width",keyword) == 0)
2637 GetMagickToken(q,&q,token);
2638 graphic_context[n]->stroke_width=StringToDouble(token,(char **) NULL);
2647 if (LocaleCompare("text",keyword) == 0)
2649 primitive_type=TextPrimitive;
2652 if (LocaleCompare("text-align",keyword) == 0)
2657 GetMagickToken(q,&q,token);
2658 align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
2664 graphic_context[n]->align=(AlignType) align;
2667 if (LocaleCompare("text-anchor",keyword) == 0)
2672 GetMagickToken(q,&q,token);
2673 align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
2679 graphic_context[n]->align=(AlignType) align;
2682 if (LocaleCompare("text-antialias",keyword) == 0)
2684 GetMagickToken(q,&q,token);
2685 graphic_context[n]->text_antialias=
2686 StringToLong(token) != 0 ? MagickTrue : MagickFalse;
2689 if (LocaleCompare("text-undercolor",keyword) == 0)
2691 GetMagickToken(q,&q,token);
2692 (void) QueryColorDatabase(token,&graphic_context[n]->undercolor,
2696 if (LocaleCompare("translate",keyword) == 0)
2698 GetMagickToken(q,&q,token);
2699 affine.tx=StringToDouble(token,(char **) NULL);
2700 GetMagickToken(q,&q,token);
2702 GetMagickToken(q,&q,token);
2703 affine.ty=StringToDouble(token,(char **) NULL);
2712 if (LocaleCompare("viewbox",keyword) == 0)
2714 GetMagickToken(q,&q,token);
2715 graphic_context[n]->viewbox.x=(ssize_t) ceil(StringToDouble(token,(char **) NULL)-
2717 GetMagickToken(q,&q,token);
2719 GetMagickToken(q,&q,token);
2720 graphic_context[n]->viewbox.y=(ssize_t) ceil(StringToDouble(token,(char **) NULL)-
2722 GetMagickToken(q,&q,token);
2724 GetMagickToken(q,&q,token);
2725 graphic_context[n]->viewbox.width=(size_t) floor(
2726 StringToDouble(token,(char **) NULL)+0.5);
2727 GetMagickToken(q,&q,token);
2729 GetMagickToken(q,&q,token);
2730 graphic_context[n]->viewbox.height=(size_t) floor(
2731 StringToDouble(token,(char **) NULL)+0.5);
2743 if (status == MagickFalse)
2745 if ((affine.sx != 1.0) || (affine.rx != 0.0) || (affine.ry != 0.0) ||
2746 (affine.sy != 1.0) || (affine.tx != 0.0) || (affine.ty != 0.0))
2748 graphic_context[n]->affine.sx=current.sx*affine.sx+current.ry*affine.rx;
2749 graphic_context[n]->affine.rx=current.rx*affine.sx+current.sy*affine.rx;
2750 graphic_context[n]->affine.ry=current.sx*affine.ry+current.ry*affine.sy;
2751 graphic_context[n]->affine.sy=current.rx*affine.ry+current.sy*affine.sy;
2752 graphic_context[n]->affine.tx=current.sx*affine.tx+current.ry*affine.ty+
2754 graphic_context[n]->affine.ty=current.rx*affine.tx+current.sy*affine.ty+
2757 if (primitive_type == UndefinedPrimitive)
2759 if (image->debug != MagickFalse)
2760 (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",
2765 Parse the primitive attributes.
2769 primitive_info[0].point.x=0.0;
2770 primitive_info[0].point.y=0.0;
2771 for (x=0; *q != '\0'; x++)
2776 if (IsPoint(q) == MagickFalse)
2778 GetMagickToken(q,&q,token);
2779 point.x=StringToDouble(token,(char **) NULL);
2780 GetMagickToken(q,&q,token);
2782 GetMagickToken(q,&q,token);
2783 point.y=StringToDouble(token,(char **) NULL);
2784 GetMagickToken(q,(const char **) NULL,token);
2786 GetMagickToken(q,&q,token);
2787 primitive_info[i].primitive=primitive_type;
2788 primitive_info[i].point=point;
2789 primitive_info[i].coordinates=0;
2790 primitive_info[i].method=FloodfillMethod;
2792 if (i < (ssize_t) number_points)
2795 primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(primitive_info,
2796 (size_t) number_points,sizeof(*primitive_info));
2797 if (primitive_info == (PrimitiveInfo *) NULL)
2799 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2800 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
2804 primitive_info[j].primitive=primitive_type;
2805 primitive_info[j].coordinates=(size_t) x;
2806 primitive_info[j].method=FloodfillMethod;
2807 primitive_info[j].text=(char *) NULL;
2809 Circumscribe primitive within a circle.
2811 bounds.x1=primitive_info[j].point.x;
2812 bounds.y1=primitive_info[j].point.y;
2813 bounds.x2=primitive_info[j].point.x;
2814 bounds.y2=primitive_info[j].point.y;
2815 for (k=1; k < (ssize_t) primitive_info[j].coordinates; k++)
2817 point=primitive_info[j+k].point;
2818 if (point.x < bounds.x1)
2820 if (point.y < bounds.y1)
2822 if (point.x > bounds.x2)
2824 if (point.y > bounds.y2)
2828 Speculate how many points our primitive might consume.
2830 length=primitive_info[j].coordinates;
2831 switch (primitive_type)
2833 case RectanglePrimitive:
2838 case RoundRectanglePrimitive:
2840 length*=5+8*BezierQuantum;
2843 case BezierPrimitive:
2845 if (primitive_info[j].coordinates > 107)
2846 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2847 DrawError,"TooManyBezierCoordinates","`%s'",token);
2848 length=BezierQuantum*primitive_info[j].coordinates;
2857 GetMagickToken(q,&q,token);
2860 for (s=token; *s != '\0'; s=t)
2865 value=StringToDouble(s,&t);
2874 length=3*length/2+6*BezierQuantum+360;
2877 case CirclePrimitive:
2879 case EllipsePrimitive:
2886 alpha=bounds.x2-bounds.x1;
2887 beta=bounds.y2-bounds.y1;
2888 radius=hypot((double) alpha,(double) beta);
2889 length=2*((size_t) ceil((double) MagickPI*radius))+6*BezierQuantum+360;
2895 if ((size_t) (i+length) >= number_points)
2898 Resize based on speculative points required by primitive.
2900 number_points+=length+1;
2901 primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(primitive_info,
2902 (size_t) number_points,sizeof(*primitive_info));
2903 if (primitive_info == (PrimitiveInfo *) NULL)
2905 (void) ThrowMagickException(&image->exception,GetMagickModule(),
2906 ResourceLimitError,"MemoryAllocationFailed","`%s'",
2911 switch (primitive_type)
2913 case PointPrimitive:
2916 if (primitive_info[j].coordinates != 1)
2921 TracePoint(primitive_info+j,primitive_info[j].point);
2922 i=(ssize_t) (j+primitive_info[j].coordinates);
2927 if (primitive_info[j].coordinates != 2)
2932 TraceLine(primitive_info+j,primitive_info[j].point,
2933 primitive_info[j+1].point);
2934 i=(ssize_t) (j+primitive_info[j].coordinates);
2937 case RectanglePrimitive:
2939 if (primitive_info[j].coordinates != 2)
2944 TraceRectangle(primitive_info+j,primitive_info[j].point,
2945 primitive_info[j+1].point);
2946 i=(ssize_t) (j+primitive_info[j].coordinates);
2949 case RoundRectanglePrimitive:
2951 if (primitive_info[j].coordinates != 3)
2956 TraceRoundRectangle(primitive_info+j,primitive_info[j].point,
2957 primitive_info[j+1].point,primitive_info[j+2].point);
2958 i=(ssize_t) (j+primitive_info[j].coordinates);
2963 if (primitive_info[j].coordinates != 3)
2965 primitive_type=UndefinedPrimitive;
2968 TraceArc(primitive_info+j,primitive_info[j].point,
2969 primitive_info[j+1].point,primitive_info[j+2].point);
2970 i=(ssize_t) (j+primitive_info[j].coordinates);
2973 case EllipsePrimitive:
2975 if (primitive_info[j].coordinates != 3)
2980 TraceEllipse(primitive_info+j,primitive_info[j].point,
2981 primitive_info[j+1].point,primitive_info[j+2].point);
2982 i=(ssize_t) (j+primitive_info[j].coordinates);
2985 case CirclePrimitive:
2987 if (primitive_info[j].coordinates != 2)
2992 TraceCircle(primitive_info+j,primitive_info[j].point,
2993 primitive_info[j+1].point);
2994 i=(ssize_t) (j+primitive_info[j].coordinates);
2997 case PolylinePrimitive:
2999 case PolygonPrimitive:
3001 primitive_info[i]=primitive_info[j];
3002 primitive_info[i].coordinates=0;
3003 primitive_info[j].coordinates++;
3007 case BezierPrimitive:
3009 if (primitive_info[j].coordinates < 3)
3014 TraceBezier(primitive_info+j,primitive_info[j].coordinates);
3015 i=(ssize_t) (j+primitive_info[j].coordinates);
3020 i=(ssize_t) (j+TracePath(primitive_info+j,token));
3023 case ColorPrimitive:
3024 case MattePrimitive:
3029 if (primitive_info[j].coordinates != 1)
3034 GetMagickToken(q,&q,token);
3035 method=ParseCommandOption(MagickMethodOptions,MagickFalse,token);
3041 primitive_info[j].method=(PaintMethod) method;
3046 if (primitive_info[j].coordinates != 1)
3052 GetMagickToken(q,&q,token);
3053 primitive_info[j].text=AcquireString(token);
3056 case ImagePrimitive:
3058 if (primitive_info[j].coordinates != 2)
3063 GetMagickToken(q,&q,token);
3064 primitive_info[j].text=AcquireString(token);
3068 if (primitive_info == (PrimitiveInfo *) NULL)
3070 if (image->debug != MagickFalse)
3071 (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int) (q-p),p);
3072 if (status == MagickFalse)
3074 primitive_info[i].primitive=UndefinedPrimitive;
3080 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
3082 point=primitive_info[i].point;
3083 primitive_info[i].point.x=graphic_context[n]->affine.sx*point.x+
3084 graphic_context[n]->affine.ry*point.y+graphic_context[n]->affine.tx;
3085 primitive_info[i].point.y=graphic_context[n]->affine.rx*point.x+
3086 graphic_context[n]->affine.sy*point.y+graphic_context[n]->affine.ty;
3087 point=primitive_info[i].point;
3088 if (point.x < graphic_context[n]->bounds.x1)
3089 graphic_context[n]->bounds.x1=point.x;
3090 if (point.y < graphic_context[n]->bounds.y1)
3091 graphic_context[n]->bounds.y1=point.y;
3092 if (point.x > graphic_context[n]->bounds.x2)
3093 graphic_context[n]->bounds.x2=point.x;
3094 if (point.y > graphic_context[n]->bounds.y2)
3095 graphic_context[n]->bounds.y2=point.y;
3096 if (primitive_info[i].primitive == ImagePrimitive)
3098 if (i >= (ssize_t) number_points)
3099 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
3101 if (graphic_context[n]->render != MagickFalse)
3103 if ((n != 0) && (graphic_context[n]->clip_mask != (char *) NULL) &&
3104 (LocaleCompare(graphic_context[n]->clip_mask,
3105 graphic_context[n-1]->clip_mask) != 0))
3106 (void) DrawClipPath(image,graphic_context[n],
3107 graphic_context[n]->clip_mask);
3108 (void) DrawPrimitive(image,graphic_context[n],primitive_info);
3110 if (primitive_info->text != (char *) NULL)
3111 primitive_info->text=(char *) RelinquishMagickMemory(
3112 primitive_info->text);
3113 proceed=SetImageProgress(image,RenderImageTag,q-primitive,(MagickSizeType)
3115 if (proceed == MagickFalse)
3118 if (image->debug != MagickFalse)
3119 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end draw-image");
3121 Relinquish resources.
3123 token=DestroyString(token);
3124 if (primitive_info != (PrimitiveInfo *) NULL)
3125 primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(primitive_info);
3126 primitive=DestroyString(primitive);
3127 for ( ; n >= 0; n--)
3128 graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
3129 graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
3130 if (status == MagickFalse)
3131 ThrowBinaryException(DrawError,"NonconformingDrawingPrimitiveDefinition",
3137 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3141 % D r a w G r a d i e n t I m a g e %
3145 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3147 % DrawGradientImage() draws a linear gradient on the image.
3149 % The format of the DrawGradientImage method is:
3151 % MagickBooleanType DrawGradientImage(Image *image,
3152 % const DrawInfo *draw_info)
3154 % A description of each parameter follows:
3156 % o image: the image.
3158 % o _info: the draw info.
3162 static inline MagickRealType GetStopColorOffset(const GradientInfo *gradient,
3163 const ssize_t x,const ssize_t y)
3165 switch (gradient->type)
3167 case UndefinedGradient:
3168 case LinearGradient:
3183 gradient_vector=(&gradient->gradient_vector);
3184 p.x=gradient_vector->x2-gradient_vector->x1;
3185 p.y=gradient_vector->y2-gradient_vector->y1;
3186 q.x=(double) x-gradient_vector->x1;
3187 q.y=(double) y-gradient_vector->y1;
3188 length=sqrt(q.x*q.x+q.y*q.y);
3189 gamma=sqrt(p.x*p.x+p.y*p.y)*length;
3190 gamma=1.0/(gamma <= MagickEpsilon ? 1.0 : gamma);
3191 scale=p.x*q.x+p.y*q.y;
3192 offset=gamma*scale*length;
3195 case RadialGradient:
3204 v.x=(double) x-gradient->center.x;
3205 v.y=(double) y-gradient->center.y;
3206 length=sqrt(v.x*v.x+v.y*v.y);
3207 if (gradient->spread == RepeatSpread)
3209 offset=length/gradient->radius;
3216 MagickExport MagickBooleanType DrawGradientImage(Image *image,
3217 const DrawInfo *draw_info)
3250 Draw linear or radial gradient on image.
3252 assert(image != (Image *) NULL);
3253 assert(image->signature == MagickSignature);
3254 if (image->debug != MagickFalse)
3255 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3256 assert(draw_info != (const DrawInfo *) NULL);
3257 gradient=(&draw_info->gradient);
3258 gradient_vector=(&gradient->gradient_vector);
3259 point.x=gradient_vector->x2-gradient_vector->x1;
3260 point.y=gradient_vector->y2-gradient_vector->y1;
3261 length=sqrt(point.x*point.x+point.y*point.y);
3262 bounding_box=gradient->bounding_box;
3264 exception=(&image->exception);
3265 GetMagickPixelPacket(image,&zero);
3266 image_view=AcquireCacheView(image);
3267 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3268 #pragma omp parallel for schedule(dynamic,4) shared(status)
3270 for (y=bounding_box.y; y < (ssize_t) bounding_box.height; y++)
3280 register IndexPacket
3287 register PixelPacket
3293 if (status == MagickFalse)
3295 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
3296 if (q == (PixelPacket *) NULL)
3301 indexes=GetCacheViewAuthenticIndexQueue(image_view);
3304 offset=GetStopColorOffset(gradient,0,y);
3305 if (gradient->type != RadialGradient)
3307 for (x=bounding_box.x; x < (ssize_t) bounding_box.width; x++)
3309 SetMagickPixelPacket(image,q,indexes+x,&pixel);
3310 switch (gradient->spread)
3312 case UndefinedSpread:
3315 if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3316 (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3318 offset=GetStopColorOffset(gradient,x,y);
3319 if (gradient->type != RadialGradient)
3322 for (i=0; i < (ssize_t) gradient->number_stops; i++)
3323 if (offset < gradient->stops[i].offset)
3325 if ((offset < 0.0) || (i == 0))
3326 composite=gradient->stops[0].color;
3328 if ((offset > 1.0) || (i == (ssize_t) gradient->number_stops))
3329 composite=gradient->stops[gradient->number_stops-1].color;
3334 alpha=(offset-gradient->stops[i].offset)/
3335 (gradient->stops[j].offset-gradient->stops[i].offset);
3336 MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
3337 &gradient->stops[j].color,alpha,&composite);
3343 if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3344 (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3346 offset=GetStopColorOffset(gradient,x,y);
3347 if (gradient->type != RadialGradient)
3352 if ((ssize_t) fmod(offset,2.0) == 0)
3353 offset=fmod(offset,1.0);
3355 offset=1.0-fmod(offset,1.0);
3356 for (i=0; i < (ssize_t) gradient->number_stops; i++)
3357 if (offset < gradient->stops[i].offset)
3360 composite=gradient->stops[0].color;
3362 if (i == (ssize_t) gradient->number_stops)
3363 composite=gradient->stops[gradient->number_stops-1].color;
3368 alpha=(offset-gradient->stops[i].offset)/
3369 (gradient->stops[j].offset-gradient->stops[i].offset);
3370 MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
3371 &gradient->stops[j].color,alpha,&composite);
3383 antialias=MagickFalse;
3385 if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
3386 (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
3388 offset=GetStopColorOffset(gradient,x,y);
3389 if (gradient->type == LinearGradient)
3391 repeat=fmod(offset,length);
3393 repeat=length-fmod(-repeat,length);
3395 repeat=fmod(offset,length);
3396 antialias=(repeat < length) && ((repeat+1.0) > length) ?
3397 MagickTrue : MagickFalse;
3398 offset=repeat/length;
3402 repeat=fmod(offset,gradient->radius);
3404 repeat=gradient->radius-fmod(-repeat,gradient->radius);
3406 repeat=fmod(offset,gradient->radius);
3407 antialias=repeat+1.0 > gradient->radius ?
3408 MagickTrue : MagickFalse;
3409 offset=repeat/gradient->radius;
3412 for (i=0; i < (ssize_t) gradient->number_stops; i++)
3413 if (offset < gradient->stops[i].offset)
3416 composite=gradient->stops[0].color;
3418 if (i == (ssize_t) gradient->number_stops)
3419 composite=gradient->stops[gradient->number_stops-1].color;
3424 alpha=(offset-gradient->stops[i].offset)/
3425 (gradient->stops[j].offset-gradient->stops[i].offset);
3426 if (antialias != MagickFalse)
3428 if (gradient->type == LinearGradient)
3429 alpha=length-repeat;
3431 alpha=gradient->radius-repeat;
3433 j=(ssize_t) gradient->number_stops-1L;
3435 MagickPixelCompositeBlend(&gradient->stops[i].color,1.0-alpha,
3436 &gradient->stops[j].color,alpha,&composite);
3441 MagickPixelCompositeOver(&composite,composite.opacity,&pixel,
3442 pixel.opacity,&pixel);
3443 SetPixelPacket(image,&pixel,q,indexes+x);
3446 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
3449 image_view=DestroyCacheView(image_view);
3454 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3458 % D r a w P a t t e r n P a t h %
3462 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3464 % DrawPatternPath() draws a pattern.
3466 % The format of the DrawPatternPath method is:
3468 % MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
3469 % const char *name,Image **pattern)
3471 % A description of each parameter follows:
3473 % o image: the image.
3475 % o draw_info: the draw info.
3477 % o name: the pattern name.
3479 % o image: the image.
3482 MagickExport MagickBooleanType DrawPatternPath(Image *image,
3483 const DrawInfo *draw_info,const char *name,Image **pattern)
3486 property[MaxTextExtent];
3501 assert(image != (Image *) NULL);
3502 assert(image->signature == MagickSignature);
3503 if (image->debug != MagickFalse)
3504 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3505 assert(draw_info != (const DrawInfo *) NULL);
3506 assert(name != (const char *) NULL);
3507 (void) FormatMagickString(property,MaxTextExtent,"%s",name);
3508 path=GetImageArtifact(image,property);
3509 if (path == (const char *) NULL)
3510 return(MagickFalse);
3511 (void) FormatMagickString(property,MaxTextExtent,"%s-geometry",name);
3512 geometry=GetImageArtifact(image,property);
3513 if (geometry == (const char *) NULL)
3514 return(MagickFalse);
3515 if ((*pattern) != (Image *) NULL)
3516 *pattern=DestroyImage(*pattern);
3517 image_info=AcquireImageInfo();
3518 image_info->size=AcquireString(geometry);
3519 *pattern=AcquireImage(image_info);
3520 image_info=DestroyImageInfo(image_info);
3521 (void) QueryColorDatabase("#00000000",&(*pattern)->background_color,
3523 (void) SetImageBackgroundColor(*pattern);
3524 if (image->debug != MagickFalse)
3525 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
3526 "begin pattern-path %s %s",name,geometry);
3527 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
3528 clone_info->fill_pattern=NewImageList();
3529 clone_info->stroke_pattern=NewImageList();
3530 (void) CloneString(&clone_info->primitive,path);
3531 status=DrawImage(*pattern,clone_info);
3532 clone_info=DestroyDrawInfo(clone_info);
3533 if (image->debug != MagickFalse)
3534 (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end pattern-path");
3539 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3543 + D r a w P o l y g o n P r i m i t i v e %
3547 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3549 % DrawPolygonPrimitive() draws a polygon on the image.
3551 % The format of the DrawPolygonPrimitive method is:
3553 % MagickBooleanType DrawPolygonPrimitive(Image *image,
3554 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
3556 % A description of each parameter follows:
3558 % o image: the image.
3560 % o draw_info: the draw info.
3562 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
3566 static PolygonInfo **DestroyPolygonThreadSet(PolygonInfo **polygon_info)
3571 assert(polygon_info != (PolygonInfo **) NULL);
3572 for (i=0; i < (ssize_t) GetOpenMPMaximumThreads(); i++)
3573 if (polygon_info[i] != (PolygonInfo *) NULL)
3574 polygon_info[i]=DestroyPolygonInfo(polygon_info[i]);
3575 polygon_info=(PolygonInfo **) RelinquishMagickMemory(polygon_info);
3576 return(polygon_info);
3579 static PolygonInfo **AcquirePolygonThreadSet(const DrawInfo *draw_info,
3580 const PrimitiveInfo *primitive_info)
3583 *restrict path_info;
3594 number_threads=GetOpenMPMaximumThreads();
3595 polygon_info=(PolygonInfo **) AcquireQuantumMemory(number_threads,
3596 sizeof(*polygon_info));
3597 if (polygon_info == (PolygonInfo **) NULL)
3598 return((PolygonInfo **) NULL);
3599 (void) ResetMagickMemory(polygon_info,0,GetOpenMPMaximumThreads()*
3600 sizeof(*polygon_info));
3601 path_info=ConvertPrimitiveToPath(draw_info,primitive_info);
3602 if (path_info == (PathInfo *) NULL)
3603 return(DestroyPolygonThreadSet(polygon_info));
3604 for (i=0; i < (ssize_t) number_threads; i++)
3606 polygon_info[i]=ConvertPathToPolygon(draw_info,path_info);
3607 if (polygon_info[i] == (PolygonInfo *) NULL)
3608 return(DestroyPolygonThreadSet(polygon_info));
3610 path_info=(PathInfo *) RelinquishMagickMemory(path_info);
3611 return(polygon_info);
3614 static MagickRealType GetPixelOpacity(PolygonInfo *polygon_info,
3615 const MagickRealType mid,const MagickBooleanType fill,
3616 const FillRule fill_rule,const double x,const double y,
3617 MagickRealType *stroke_opacity)
3631 register const PointInfo
3642 Compute fill & stroke opacity for this (x,y) point.
3644 *stroke_opacity=0.0;
3645 subpath_opacity=0.0;
3646 p=polygon_info->edges;
3647 for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
3649 if (y <= (p->bounds.y1-mid-0.5))
3651 if (y > (p->bounds.y2+mid+0.5))
3653 (void) DestroyEdge(polygon_info,(size_t) j);
3656 if ((x <= (p->bounds.x1-mid-0.5)) || (x > (p->bounds.x2+mid+0.5)))
3658 i=(ssize_t) MagickMax((double) p->highwater,1.0);
3659 for ( ; i < (ssize_t) p->number_points; i++)
3661 if (y <= (p->points[i-1].y-mid-0.5))
3663 if (y > (p->points[i].y+mid+0.5))
3665 if (p->scanline != y)
3668 p->highwater=(size_t) i;
3671 Compute distance between a point and an edge.
3674 delta.x=(q+1)->x-q->x;
3675 delta.y=(q+1)->y-q->y;
3676 beta=delta.x*(x-q->x)+delta.y*(y-q->y);
3681 distance=delta.x*delta.x+delta.y*delta.y;
3685 alpha=delta.x*delta.x+delta.y*delta.y;
3690 distance=delta.x*delta.x+delta.y*delta.y;
3695 beta=delta.x*(y-q->y)-delta.y*(x-q->x);
3696 distance=alpha*beta*beta;
3700 Compute stroke & subpath opacity.
3703 if (p->ghostline == MagickFalse)
3706 if ((*stroke_opacity < 1.0) &&
3707 (distance <= ((alpha+0.25)*(alpha+0.25))))
3710 if (distance <= ((alpha+0.25)*(alpha+0.25)))
3711 *stroke_opacity=1.0;
3715 if (distance != 1.0)
3716 beta=sqrt((double) distance);
3718 if (*stroke_opacity < ((alpha-0.25)*(alpha-0.25)))
3719 *stroke_opacity=(alpha-0.25)*(alpha-0.25);
3723 if ((fill == MagickFalse) || (distance > 1.0) || (subpath_opacity >= 1.0))
3725 if (distance <= 0.0)
3727 subpath_opacity=1.0;
3735 if (distance != 1.0)
3736 beta=sqrt(distance);
3739 if (subpath_opacity < (alpha*alpha))
3740 subpath_opacity=alpha*alpha;
3744 Compute fill opacity.
3746 if (fill == MagickFalse)
3748 if (subpath_opacity >= 1.0)
3751 Determine winding number.
3754 p=polygon_info->edges;
3755 for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
3757 if (y <= p->bounds.y1)
3759 if ((y > p->bounds.y2) || (x <= p->bounds.x1))
3761 if (x > p->bounds.x2)
3763 winding_number+=p->direction ? 1 : -1;
3766 i=(ssize_t) MagickMax((double) p->highwater,1.0);
3767 for ( ; i < (ssize_t) p->number_points; i++)
3768 if (y <= p->points[i].y)
3771 if ((((q+1)->x-q->x)*(y-q->y)) <= (((q+1)->y-q->y)*(x-q->x)))
3772 winding_number+=p->direction ? 1 : -1;
3774 if (fill_rule != NonZeroRule)
3776 if ((MagickAbsoluteValue(winding_number) & 0x01) != 0)
3780 if (MagickAbsoluteValue(winding_number) != 0)
3782 return(subpath_opacity);
3785 static MagickBooleanType DrawPolygonPrimitive(Image *image,
3786 const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
3802 **restrict polygon_info;
3819 Compute bounding box.
3821 assert(image != (Image *) NULL);
3822 assert(image->signature == MagickSignature);
3823 if (image->debug != MagickFalse)
3824 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3825 assert(draw_info != (DrawInfo *) NULL);
3826 assert(draw_info->signature == MagickSignature);
3827 assert(primitive_info != (PrimitiveInfo *) NULL);
3828 if (primitive_info->coordinates == 0)
3830 polygon_info=AcquirePolygonThreadSet(draw_info,primitive_info);
3831 if (polygon_info == (PolygonInfo **) NULL)
3832 return(MagickFalse);
3834 DrawBoundingRectangles(image,draw_info,polygon_info[0]);
3835 if (image->debug != MagickFalse)
3836 (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-polygon");
3837 fill=(primitive_info->method == FillToBorderMethod) ||
3838 (primitive_info->method == FloodfillMethod) ? MagickTrue : MagickFalse;
3839 mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
3840 bounds=polygon_info[0]->edges[0].bounds;
3841 for (i=1; i < (ssize_t) polygon_info[0]->number_edges; i++)
3843 p=polygon_info[0]->edges+i;
3844 if (p->bounds.x1 < bounds.x1)
3845 bounds.x1=p->bounds.x1;
3846 if (p->bounds.y1 < bounds.y1)
3847 bounds.y1=p->bounds.y1;
3848 if (p->bounds.x2 > bounds.x2)
3849 bounds.x2=p->bounds.x2;
3850 if (p->bounds.y2 > bounds.y2)
3851 bounds.y2=p->bounds.y2;
3853 bounds.x1-=(mid+1.0);
3854 bounds.x1=bounds.x1 < 0.0 ? 0.0 : (size_t) ceil(bounds.x1-0.5) >=
3855 image->columns ? (double) image->columns-1.0 : bounds.x1;
3856 bounds.y1-=(mid+1.0);
3857 bounds.y1=bounds.y1 < 0.0 ? 0.0 : (size_t) ceil(bounds.y1-0.5) >=
3858 image->rows ? (double) image->rows-1.0 : bounds.y1;
3859 bounds.x2+=(mid+1.0);
3860 bounds.x2=bounds.x2 < 0.0 ? 0.0 : (size_t) floor(bounds.x2+0.5) >=
3861 image->columns ? (double) image->columns-1.0 : bounds.x2;
3862 bounds.y2+=(mid+1.0);
3863 bounds.y2=bounds.y2 < 0.0 ? 0.0 : (size_t) floor(bounds.y2+0.5) >=
3864 image->rows ? (double) image->rows-1.0 : bounds.y2;
3866 exception=(&image->exception);
3867 start=(ssize_t) ceil(bounds.x1-0.5);
3868 stop=(ssize_t) floor(bounds.x2+0.5);
3869 image_view=AcquireCacheView(image);
3870 if (primitive_info->coordinates == 1)
3875 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3876 #pragma omp parallel for schedule(dynamic,4) shared(status)
3878 for (y=(ssize_t) ceil(bounds.y1-0.5); y <= (ssize_t) floor(bounds.y2+0.5); y++)
3886 register PixelPacket
3889 if (status == MagickFalse)
3892 q=GetCacheViewAuthenticPixels(image_view,x,y,(size_t) (stop-x+1),
3894 if (q == (PixelPacket *) NULL)
3899 for ( ; x <= stop; x++)
3901 if ((x == (ssize_t) ceil(primitive_info->point.x-0.5)) &&
3902 (y == (ssize_t) ceil(primitive_info->point.y-0.5)))
3903 (void) GetStrokeColor(draw_info,x,y,q);
3906 sync=SyncCacheViewAuthenticPixels(image_view,exception);
3907 if (sync == MagickFalse)
3910 image_view=DestroyCacheView(image_view);
3911 polygon_info=DestroyPolygonThreadSet(polygon_info);
3912 if (image->debug != MagickFalse)
3913 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
3914 " end draw-polygon");
3918 Draw polygon or line.
3920 if (image->matte == MagickFalse)
3921 (void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
3922 #if defined(MAGICKCORE_OPENMP_SUPPORT)
3923 #pragma omp parallel for schedule(dynamic,4) shared(status)
3925 for (y=(ssize_t) ceil(bounds.y1-0.5); y <= (ssize_t) floor(bounds.y2+0.5); y++)
3928 id = GetOpenMPThreadId();
3938 register PixelPacket
3944 if (status == MagickFalse)
3946 q=GetCacheViewAuthenticPixels(image_view,start,y,(size_t) (stop-
3947 start+1),1,exception);
3948 if (q == (PixelPacket *) NULL)
3953 for (x=start; x <= stop; x++)
3958 fill_opacity=GetPixelOpacity(polygon_info[id],mid,fill,
3959 draw_info->fill_rule,(double) x,(double) y,&stroke_opacity);
3960 if (draw_info->stroke_antialias == MagickFalse)
3962 fill_opacity=fill_opacity > 0.25 ? 1.0 : 0.0;
3963 stroke_opacity=stroke_opacity > 0.25 ? 1.0 : 0.0;
3965 (void) GetFillColor(draw_info,x,y,&fill_color);
3966 fill_opacity=(MagickRealType) (QuantumRange-fill_opacity*(QuantumRange-
3967 fill_color.opacity));
3968 MagickCompositeOver(&fill_color,fill_opacity,q,(MagickRealType)
3970 (void) GetStrokeColor(draw_info,x,y,&stroke_color);
3971 stroke_opacity=(MagickRealType) (QuantumRange-stroke_opacity*
3972 (QuantumRange-stroke_color.opacity));
3973 MagickCompositeOver(&stroke_color,stroke_opacity,q,(MagickRealType)
3977 if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
3980 image_view=DestroyCacheView(image_view);
3981 polygon_info=DestroyPolygonThreadSet(polygon_info);
3982 if (image->debug != MagickFalse)
3983 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-polygon");
3988 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3992 % D r a w P r i m i t i v e %
3996 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3998 % DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.
4000 % The format of the DrawPrimitive method is:
4002 % MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
4003 % PrimitiveInfo *primitive_info)
4005 % A description of each parameter follows:
4007 % o image: the image.
4009 % o draw_info: the draw info.
4011 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4015 static void LogPrimitiveInfo(const PrimitiveInfo *primitive_info)
4041 x=(ssize_t) ceil(primitive_info->point.x-0.5);
4042 y=(ssize_t) ceil(primitive_info->point.y-0.5);
4043 switch (primitive_info->primitive)
4045 case PointPrimitive:
4047 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4048 "PointPrimitive %.20g,%.20g %s",(double) x,(double) y,
4049 methods[primitive_info->method]);
4052 case ColorPrimitive:
4054 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4055 "ColorPrimitive %.20g,%.20g %s",(double) x,(double) y,
4056 methods[primitive_info->method]);
4059 case MattePrimitive:
4061 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4062 "MattePrimitive %.20g,%.20g %s",(double) x,(double) y,
4063 methods[primitive_info->method]);
4068 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4069 "TextPrimitive %.20g,%.20g",(double) x,(double) y);
4072 case ImagePrimitive:
4074 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4075 "ImagePrimitive %.20g,%.20g",(double) x,(double) y);
4082 p=primitive_info[0].point;
4085 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
4087 point=primitive_info[i].point;
4088 if (coordinates <= 0)
4090 coordinates=(ssize_t) primitive_info[i].coordinates;
4091 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4092 " begin open (%.20g)",(double) coordinates);
4095 point=primitive_info[i].point;
4096 if ((fabs(q.x-point.x) > MagickEpsilon) ||
4097 (fabs(q.y-point.y) > MagickEpsilon))
4098 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4099 " %.20g: %.18g,%.18g",(double) coordinates,point.x,point.y);
4101 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4102 " %.20g: %g %g (duplicate)",(double) coordinates,point.x,point.y);
4105 if (coordinates > 0)
4107 if ((fabs(p.x-point.x) > MagickEpsilon) ||
4108 (fabs(p.y-point.y) > MagickEpsilon))
4109 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end last (%.20g)",
4110 (double) coordinates);
4112 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end open (%.20g)",
4113 (double) coordinates);
4117 MagickExport MagickBooleanType DrawPrimitive(Image *image,
4118 const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4136 if (image->debug != MagickFalse)
4138 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4139 " begin draw-primitive");
4140 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4141 " affine: %g %g %g %g %g %g",draw_info->affine.sx,
4142 draw_info->affine.rx,draw_info->affine.ry,draw_info->affine.sy,
4143 draw_info->affine.tx,draw_info->affine.ty);
4146 exception=(&image->exception);
4147 x=(ssize_t) ceil(primitive_info->point.x-0.5);
4148 y=(ssize_t) ceil(primitive_info->point.y-0.5);
4149 image_view=AcquireCacheView(image);
4150 switch (primitive_info->primitive)
4152 case PointPrimitive:
4160 if ((y < 0) || (y >= (ssize_t) image->rows))
4162 if ((x < 0) || (x >= (ssize_t) image->columns))
4164 q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4165 if (q == (PixelPacket *) NULL)
4167 (void) GetFillColor(draw_info,x,y,&fill_color);
4168 MagickCompositeOver(&fill_color,(MagickRealType) fill_color.opacity,q,
4169 (MagickRealType) q->opacity,q);
4170 (void) SyncCacheViewAuthenticPixels(image_view,exception);
4173 case ColorPrimitive:
4175 switch (primitive_info->method)
4183 q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4184 if (q == (PixelPacket *) NULL)
4186 (void) GetFillColor(draw_info,x,y,q);
4187 (void) SyncCacheViewAuthenticPixels(image_view,exception);
4198 (void) GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
4199 for (y=0; y < (ssize_t) image->rows; y++)
4201 register PixelPacket
4204 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4206 if (q == (PixelPacket *) NULL)
4208 for (x=0; x < (ssize_t) image->columns; x++)
4210 if (IsColorSimilar(image,q,&target) == MagickFalse)
4215 (void) GetFillColor(draw_info,x,y,q);
4218 sync=SyncCacheViewAuthenticPixels(image_view,exception);
4219 if (sync == MagickFalse)
4224 case FloodfillMethod:
4225 case FillToBorderMethod:
4230 (void) GetOneVirtualMagickPixel(image,x,y,&target,exception);
4231 if (primitive_info->method == FillToBorderMethod)
4233 target.red=(MagickRealType) draw_info->border_color.red;
4234 target.green=(MagickRealType) draw_info->border_color.green;
4235 target.blue=(MagickRealType) draw_info->border_color.blue;
4237 (void) FloodfillPaintImage(image,DefaultChannels,draw_info,&target,x,
4238 y,primitive_info->method == FloodfillMethod ? MagickFalse :
4247 for (y=0; y < (ssize_t) image->rows; y++)
4249 register PixelPacket
4255 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4257 if (q == (PixelPacket *) NULL)
4259 for (x=0; x < (ssize_t) image->columns; x++)
4261 (void) GetFillColor(draw_info,x,y,q);
4264 sync=SyncCacheViewAuthenticPixels(image_view,exception);
4265 if (sync == MagickFalse)
4273 case MattePrimitive:
4275 if (image->matte == MagickFalse)
4276 (void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
4277 switch (primitive_info->method)
4288 q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
4289 if (q == (PixelPacket *) NULL)
4291 (void) GetFillColor(draw_info,x,y,&pixel);
4292 SetOpacityPixelComponent(q,pixel.opacity);
4293 (void) SyncCacheViewAuthenticPixels(image_view,exception);
4305 (void) GetOneCacheViewVirtualPixel(image_view,x,y,&target,exception);
4306 for (y=0; y < (ssize_t) image->rows; y++)
4308 register PixelPacket
4314 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4316 if (q == (PixelPacket *) NULL)
4318 for (x=0; x < (ssize_t) image->columns; x++)
4320 if (IsColorSimilar(image,q,&target) == MagickFalse)
4325 (void) GetFillColor(draw_info,x,y,&pixel);
4326 SetOpacityPixelComponent(q,pixel.opacity);
4329 sync=SyncCacheViewAuthenticPixels(image_view,exception);
4330 if (sync == MagickFalse)
4335 case FloodfillMethod:
4336 case FillToBorderMethod:
4341 (void) GetOneVirtualMagickPixel(image,x,y,&target,exception);
4342 if (primitive_info->method == FillToBorderMethod)
4344 target.red=(MagickRealType) draw_info->border_color.red;
4345 target.green=(MagickRealType) draw_info->border_color.green;
4346 target.blue=(MagickRealType) draw_info->border_color.blue;
4348 (void) FloodfillPaintImage(image,OpacityChannel,draw_info,&target,x,y,
4349 primitive_info->method == FloodfillMethod ? MagickFalse :
4361 for (y=0; y < (ssize_t) image->rows; y++)
4363 register PixelPacket
4369 q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
4371 if (q == (PixelPacket *) NULL)
4373 for (x=0; x < (ssize_t) image->columns; x++)
4375 (void) GetFillColor(draw_info,x,y,&pixel);
4376 SetOpacityPixelComponent(q,pixel.opacity);
4379 sync=SyncCacheViewAuthenticPixels(image_view,exception);
4380 if (sync == MagickFalse)
4391 geometry[MaxTextExtent];
4396 if (primitive_info->text == (char *) NULL)
4398 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4399 (void) CloneString(&clone_info->text,primitive_info->text);
4400 (void) FormatMagickString(geometry,MaxTextExtent,"%+f%+f",
4401 primitive_info->point.x,primitive_info->point.y);
4402 (void) CloneString(&clone_info->geometry,geometry);
4403 status=AnnotateImage(image,clone_info);
4404 clone_info=DestroyDrawInfo(clone_info);
4407 case ImagePrimitive:
4413 composite_geometry[MaxTextExtent];
4428 if (primitive_info->text == (char *) NULL)
4430 clone_info=AcquireImageInfo();
4431 if (LocaleNCompare(primitive_info->text,"data:",5) == 0)
4432 composite_image=ReadInlineImage(clone_info,primitive_info->text,
4436 (void) CopyMagickString(clone_info->filename,primitive_info->text,
4438 composite_image=ReadImage(clone_info,&image->exception);
4440 clone_info=DestroyImageInfo(clone_info);
4441 if (composite_image == (Image *) NULL)
4443 (void) SetImageProgressMonitor(composite_image,(MagickProgressMonitor)
4444 NULL,(void *) NULL);
4445 x1=(ssize_t) ceil(primitive_info[1].point.x-0.5);
4446 y1=(ssize_t) ceil(primitive_info[1].point.y-0.5);
4447 if (((x1 != 0L) && (x1 != (ssize_t) composite_image->columns)) ||
4448 ((y1 != 0L) && (y1 != (ssize_t) composite_image->rows)))
4451 geometry[MaxTextExtent];
4456 (void) FormatMagickString(geometry,MaxTextExtent,"%gx%g!",
4457 primitive_info[1].point.x,primitive_info[1].point.y);
4458 composite_image->filter=image->filter;
4459 (void) TransformImage(&composite_image,(char *) NULL,geometry);
4461 if (composite_image->matte == MagickFalse)
4462 (void) SetImageAlphaChannel(composite_image,OpaqueAlphaChannel);
4463 if (draw_info->opacity != OpaqueOpacity)
4464 (void) SetImageOpacity(composite_image,draw_info->opacity);
4465 SetGeometry(image,&geometry);
4466 image->gravity=draw_info->gravity;
4469 (void) FormatMagickString(composite_geometry,MaxTextExtent,
4470 "%.20gx%.20g%+.20g%+.20g",(double) composite_image->columns,(double)
4471 composite_image->rows,(double) geometry.x,(double) geometry.y);
4472 (void) ParseGravityGeometry(image,composite_geometry,&geometry,
4474 affine=draw_info->affine;
4475 affine.tx=(double) geometry.x;
4476 affine.ty=(double) geometry.y;
4477 composite_image->interpolate=image->interpolate;
4478 if (draw_info->compose == OverCompositeOp)
4479 (void) DrawAffineImage(image,composite_image,&affine);
4481 (void) CompositeImage(image,draw_info->compose,composite_image,
4482 geometry.x,geometry.y);
4483 composite_image=DestroyImage(composite_image);
4495 if (IsEventLogging() != MagickFalse)
4496 LogPrimitiveInfo(primitive_info);
4497 scale=ExpandAffine(&draw_info->affine);
4498 if ((draw_info->dash_pattern != (double *) NULL) &&
4499 (draw_info->dash_pattern[0] != 0.0) &&
4500 ((scale*draw_info->stroke_width) > MagickEpsilon) &&
4501 (draw_info->stroke.opacity != (Quantum) TransparentOpacity))
4506 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4507 clone_info->stroke_width=0.0;
4508 clone_info->stroke.opacity=(Quantum) TransparentOpacity;
4509 status=DrawPolygonPrimitive(image,clone_info,primitive_info);
4510 clone_info=DestroyDrawInfo(clone_info);
4511 (void) DrawDashPolygon(draw_info,primitive_info,image);
4514 mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
4516 (draw_info->stroke.opacity != (Quantum) TransparentOpacity))
4522 Draw strokes while respecting line cap/join attributes.
4524 for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
4526 (primitive_info[i-1].point.x == primitive_info[0].point.x) &&
4527 (primitive_info[i-1].point.y == primitive_info[0].point.y) ?
4528 MagickTrue : MagickFalse;
4529 i=(ssize_t) primitive_info[0].coordinates;
4530 if ((((draw_info->linecap == RoundCap) ||
4531 (closed_path != MagickFalse)) &&
4532 (draw_info->linejoin == RoundJoin)) ||
4533 (primitive_info[i].primitive != UndefinedPrimitive))
4535 (void) DrawPolygonPrimitive(image,draw_info,primitive_info);
4538 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4539 clone_info->stroke_width=0.0;
4540 clone_info->stroke.opacity=(Quantum) TransparentOpacity;
4541 status=DrawPolygonPrimitive(image,clone_info,primitive_info);
4542 clone_info=DestroyDrawInfo(clone_info);
4543 status|=DrawStrokePolygon(image,draw_info,primitive_info);
4546 status=DrawPolygonPrimitive(image,draw_info,primitive_info);
4550 image_view=DestroyCacheView(image_view);
4551 if (image->debug != MagickFalse)
4552 (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-primitive");
4553 return(status != 0 ? MagickTrue : MagickFalse);
4557 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4561 + D r a w S t r o k e P o l y g o n %
4565 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4567 % DrawStrokePolygon() draws a stroked polygon (line, rectangle, ellipse) on
4568 % the image while respecting the line cap and join attributes.
4570 % The format of the DrawStrokePolygon method is:
4572 % MagickBooleanType DrawStrokePolygon(Image *image,
4573 % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4575 % A description of each parameter follows:
4577 % o image: the image.
4579 % o draw_info: the draw info.
4581 % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
4586 static void DrawRoundLinecap(Image *image,const DrawInfo *draw_info,
4587 const PrimitiveInfo *primitive_info)
4595 for (i=0; i < 4; i++)
4596 linecap[i]=(*primitive_info);
4597 linecap[0].coordinates=4;
4598 linecap[1].point.x+=(double) (10.0*MagickEpsilon);
4599 linecap[2].point.x+=(double) (10.0*MagickEpsilon);
4600 linecap[2].point.y+=(double) (10.0*MagickEpsilon);
4601 linecap[3].point.y+=(double) (10.0*MagickEpsilon);
4602 linecap[4].primitive=UndefinedPrimitive;
4603 (void) DrawPolygonPrimitive(image,draw_info,linecap);
4606 static MagickBooleanType DrawStrokePolygon(Image *image,
4607 const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
4619 register const PrimitiveInfo
4624 Draw stroked polygon.
4626 if (image->debug != MagickFalse)
4627 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4628 " begin draw-stroke-polygon");
4629 clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
4630 clone_info->fill=draw_info->stroke;
4631 clone_info->stroke.opacity=(Quantum) TransparentOpacity;
4632 clone_info->stroke_width=0.0;
4633 clone_info->fill_rule=NonZeroRule;
4635 for (p=primitive_info; p->primitive != UndefinedPrimitive; p+=p->coordinates)
4637 stroke_polygon=TraceStrokePolygon(draw_info,p);
4638 status=DrawPolygonPrimitive(image,clone_info,stroke_polygon);
4639 stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
4640 q=p+p->coordinates-1;
4641 closed_path=(q->point.x == p->point.x) && (q->point.y == p->point.y) ?
4642 MagickTrue : MagickFalse;
4643 if ((draw_info->linecap == RoundCap) && (closed_path == MagickFalse))
4645 DrawRoundLinecap(image,draw_info,p);
4646 DrawRoundLinecap(image,draw_info,q);
4649 clone_info=DestroyDrawInfo(clone_info);
4650 if (image->debug != MagickFalse)
4651 (void) LogMagickEvent(DrawEvent,GetMagickModule(),
4652 " end draw-stroke-polygon");
4657 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4661 % G e t A f f i n e M a t r i x %
4665 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4667 % GetAffineMatrix() returns an AffineMatrix initialized to the identity
4670 % The format of the GetAffineMatrix method is:
4672 % void GetAffineMatrix(AffineMatrix *affine_matrix)
4674 % A description of each parameter follows:
4676 % o affine_matrix: the affine matrix.
4679 MagickExport void GetAffineMatrix(AffineMatrix *affine_matrix)
4681 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
4682 assert(affine_matrix != (AffineMatrix *) NULL);
4683 (void) ResetMagickMemory(affine_matrix,0,sizeof(*affine_matrix));
4684 affine_matrix->sx=1.0;
4685 affine_matrix->sy=1.0;
4689 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4693 + G e t D r a w I n f o %
4697 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4699 % GetDrawInfo() initializes draw_info to default values.
4701 % The format of the GetDrawInfo method is:
4703 % void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
4705 % A description of each parameter follows:
4707 % o image_info: the image info..
4709 % o draw_info: the draw info.
4712 MagickExport void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
4724 Initialize draw attributes.
4726 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
4727 assert(draw_info != (DrawInfo *) NULL);
4728 (void) ResetMagickMemory(draw_info,0,sizeof(*draw_info));
4729 clone_info=CloneImageInfo(image_info);
4730 GetAffineMatrix(&draw_info->affine);
4731 exception=AcquireExceptionInfo();
4732 (void) QueryColorDatabase("#000F",&draw_info->fill,exception);
4733 (void) QueryColorDatabase("#FFF0",&draw_info->stroke,exception);
4734 draw_info->stroke_antialias=clone_info->antialias;
4735 draw_info->stroke_width=1.0;
4736 draw_info->opacity=OpaqueOpacity;
4737 draw_info->fill_rule=EvenOddRule;
4738 draw_info->linecap=ButtCap;
4739 draw_info->linejoin=MiterJoin;
4740 draw_info->miterlimit=10;
4741 draw_info->decorate=NoDecoration;
4742 if (clone_info->font != (char *) NULL)
4743 draw_info->font=AcquireString(clone_info->font);
4744 if (clone_info->density != (char *) NULL)
4745 draw_info->density=AcquireString(clone_info->density);
4746 draw_info->text_antialias=clone_info->antialias;
4747 draw_info->pointsize=12.0;
4748 if (clone_info->pointsize != 0.0)
4749 draw_info->pointsize=clone_info->pointsize;
4750 draw_info->undercolor.opacity=(Quantum) TransparentOpacity;
4751 draw_info->border_color=clone_info->border_color;
4752 draw_info->compose=OverCompositeOp;
4753 if (clone_info->server_name != (char *) NULL)
4754 draw_info->server_name=AcquireString(clone_info->server_name);
4755 draw_info->render=MagickTrue;
4756 draw_info->debug=IsEventLogging();
4757 option=GetImageOption(clone_info,"encoding");
4758 if (option != (const char *) NULL)
4759 (void) CloneString(&draw_info->encoding,option);
4760 option=GetImageOption(clone_info,"kerning");
4761 if (option != (const char *) NULL)
4762 draw_info->kerning=StringToDouble(option,(char **) NULL);
4763 option=GetImageOption(clone_info,"interline-spacing");
4764 if (option != (const char *) NULL)
4765 draw_info->interline_spacing=StringToDouble(option,(char **) NULL);
4766 draw_info->direction=UndefinedDirection;
4767 option=GetImageOption(clone_info,"interword-spacing");
4768 if (option != (const char *) NULL)
4769 draw_info->interword_spacing=StringToDouble(option,(char **) NULL);
4770 option=GetImageOption(clone_info,"direction");
4771 if (option != (const char *) NULL)
4772 draw_info->direction=(DirectionType) ParseCommandOption(
4773 MagickDirectionOptions,MagickFalse,option);
4774 option=GetImageOption(clone_info,"fill");
4775 if (option != (const char *) NULL)
4776 (void) QueryColorDatabase(option,&draw_info->fill,exception);
4777 option=GetImageOption(clone_info,"stroke");
4778 if (option != (const char *) NULL)
4779 (void) QueryColorDatabase(option,&draw_info->stroke,exception);
4780 option=GetImageOption(clone_info,"strokewidth");
4781 if (option != (const char *) NULL)
4782 draw_info->stroke_width=StringToDouble(option,(char **) NULL);
4783 option=GetImageOption(clone_info,"undercolor");
4784 if (option != (const char *) NULL)
4785 (void) QueryColorDatabase(option,&draw_info->undercolor,exception);
4786 option=GetImageOption(clone_info,"gravity");
4787 if (option != (const char *) NULL)
4788 draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
4789 MagickFalse,option);
4790 exception=DestroyExceptionInfo(exception);
4791 draw_info->signature=MagickSignature;
4792 clone_info=DestroyImageInfo(clone_info);
4796 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4800 + P e r m u t a t e %
4804 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4806 % Permutate() returns the permuation of the (n,k).
4808 % The format of the Permutate method is:
4810 % void Permutate(ssize_t n,ssize_t k)
4812 % A description of each parameter follows:
4820 static inline MagickRealType Permutate(const ssize_t n,const ssize_t k)
4829 for (i=k+1; i <= n; i++)
4831 for (i=1; i <= (n-k); i++)
4837 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4841 + T r a c e P r i m i t i v e %
4845 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4847 % TracePrimitive is a collection of methods for generating graphic
4848 % primitives such as arcs, ellipses, paths, etc.
4852 static void TraceArc(PrimitiveInfo *primitive_info,const PointInfo start,
4853 const PointInfo end,const PointInfo degrees)
4859 center.x=0.5*(end.x+start.x);
4860 center.y=0.5*(end.y+start.y);
4861 radii.x=fabs(center.x-start.x);
4862 radii.y=fabs(center.y-start.y);
4863 TraceEllipse(primitive_info,center,radii,degrees);
4866 static void TraceArcPath(PrimitiveInfo *primitive_info,const PointInfo start,
4867 const PointInfo end,const PointInfo arc,const MagickRealType angle,
4868 const MagickBooleanType large_arc,const MagickBooleanType sweep)
4883 register MagickRealType
4887 register PrimitiveInfo
4896 if ((start.x == end.x) && (start.y == end.y))
4898 TracePoint(primitive_info,end);
4901 radii.x=fabs(arc.x);
4902 radii.y=fabs(arc.y);
4903 if ((radii.x == 0.0) || (radii.y == 0.0))
4905 TraceLine(primitive_info,start,end);
4908 cosine=cos(DegreesToRadians(fmod((double) angle,360.0)));
4909 sine=sin(DegreesToRadians(fmod((double) angle,360.0)));
4910 center.x=(double) (cosine*(end.x-start.x)/2+sine*(end.y-start.y)/2);
4911 center.y=(double) (cosine*(end.y-start.y)/2-sine*(end.x-start.x)/2);
4912 delta=(center.x*center.x)/(radii.x*radii.x)+(center.y*center.y)/
4914 if (delta < MagickEpsilon)
4916 TraceLine(primitive_info,start,end);
4921 radii.x*=sqrt((double) delta);
4922 radii.y*=sqrt((double) delta);
4924 points[0].x=(double) (cosine*start.x/radii.x+sine*start.y/radii.x);
4925 points[0].y=(double) (cosine*start.y/radii.y-sine*start.x/radii.y);
4926 points[1].x=(double) (cosine*end.x/radii.x+sine*end.y/radii.x);
4927 points[1].y=(double) (cosine*end.y/radii.y-sine*end.x/radii.y);
4928 alpha=points[1].x-points[0].x;
4929 beta=points[1].y-points[0].y;
4930 factor=1.0/(alpha*alpha+beta*beta)-0.25;
4935 factor=sqrt((double) factor);
4936 if (sweep == large_arc)
4939 center.x=(double) ((points[0].x+points[1].x)/2-factor*beta);
4940 center.y=(double) ((points[0].y+points[1].y)/2+factor*alpha);
4941 alpha=atan2(points[0].y-center.y,points[0].x-center.x);
4942 theta=atan2(points[1].y-center.y,points[1].x-center.x)-alpha;
4943 if ((theta < 0.0) && (sweep != MagickFalse))
4944 theta+=(MagickRealType) (2.0*MagickPI);
4946 if ((theta > 0.0) && (sweep == MagickFalse))
4947 theta-=(MagickRealType) (2.0*MagickPI);
4948 arc_segments=(size_t) ceil(fabs((double) (theta/(0.5*MagickPI+
4951 for (i=0; i < (ssize_t) arc_segments; i++)
4953 beta=0.5*((alpha+(i+1)*theta/arc_segments)-(alpha+i*theta/arc_segments));
4954 gamma=(8.0/3.0)*sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))*
4955 sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))/
4956 sin(fmod((double) beta,DegreesToRadians(360.0)));
4957 points[0].x=(double) (center.x+cos(fmod((double) (alpha+(double) i*theta/
4958 arc_segments),DegreesToRadians(360.0)))-gamma*sin(fmod((double) (alpha+
4959 (double) i*theta/arc_segments),DegreesToRadians(360.0))));
4960 points[0].y=(double) (center.y+sin(fmod((double) (alpha+(double) i*theta/
4961 arc_segments),DegreesToRadians(360.0)))+gamma*cos(fmod((double) (alpha+
4962 (double) i*theta/arc_segments),DegreesToRadians(360.0))));
4963 points[2].x=(double) (center.x+cos(fmod((double) (alpha+(double) (i+1)*
4964 theta/arc_segments),DegreesToRadians(360.0))));
4965 points[2].y=(double) (center.y+sin(fmod((double) (alpha+(double) (i+1)*
4966 theta/arc_segments),DegreesToRadians(360.0))));
4967 points[1].x=(double) (points[2].x+gamma*sin(fmod((double) (alpha+(double)
4968 (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
4969 points[1].y=(double) (points[2].y-gamma*cos(fmod((double) (alpha+(double)
4970 (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
4971 p->point.x=(p == primitive_info) ? start.x : (p-1)->point.x;
4972 p->point.y=(p == primitive_info) ? start.y : (p-1)->point.y;
4973 (p+1)->point.x=(double) (cosine*radii.x*points[0].x-sine*radii.y*
4975 (p+1)->point.y=(double) (sine*radii.x*points[0].x+cosine*radii.y*
4977 (p+2)->point.x=(double) (cosine*radii.x*points[1].x-sine*radii.y*
4979 (p+2)->point.y=(double) (sine*radii.x*points[1].x+cosine*radii.y*
4981 (p+3)->point.x=(double) (cosine*radii.x*points[2].x-sine*radii.y*
4983 (p+3)->point.y=(double) (sine*radii.x*points[2].x+cosine*radii.y*
4985 if (i == (ssize_t) (arc_segments-1))
4990 primitive_info->coordinates=(size_t) (p-primitive_info);
4991 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
4993 p->primitive=primitive_info->primitive;
4998 static void TraceBezier(PrimitiveInfo *primitive_info,
4999 const size_t number_coordinates)
5011 register PrimitiveInfo
5023 Allocate coeficients.
5025 quantum=number_coordinates;
5026 for (i=0; i < (ssize_t) number_coordinates; i++)
5028 for (j=i+1; j < (ssize_t) number_coordinates; j++)
5030 alpha=fabs(primitive_info[j].point.x-primitive_info[i].point.x);
5031 if (alpha > (MagickRealType) quantum)
5032 quantum=(size_t) alpha;
5033 alpha=fabs(primitive_info[j].point.y-primitive_info[i].point.y);
5034 if (alpha > (MagickRealType) quantum)
5035 quantum=(size_t) alpha;
5038 quantum=(size_t) MagickMin((double) quantum/number_coordinates,
5039 (double) BezierQuantum);
5040 control_points=quantum*number_coordinates;
5041 coefficients=(MagickRealType *) AcquireQuantumMemory((size_t)
5042 number_coordinates,sizeof(*coefficients));
5043 points=(PointInfo *) AcquireQuantumMemory((size_t) control_points,
5045 if ((coefficients == (MagickRealType *) NULL) ||
5046 (points == (PointInfo *) NULL))
5047 ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
5049 Compute bezier points.
5051 end=primitive_info[number_coordinates-1].point;
5052 for (i=0; i < (ssize_t) number_coordinates; i++)
5053 coefficients[i]=Permutate((ssize_t) number_coordinates-1,i);
5055 for (i=0; i < (ssize_t) control_points; i++)
5060 alpha=pow((double) (1.0-weight),(double) number_coordinates-1.0);
5061 for (j=0; j < (ssize_t) number_coordinates; j++)
5063 point.x+=alpha*coefficients[j]*p->point.x;
5064 point.y+=alpha*coefficients[j]*p->point.y;
5065 alpha*=weight/(1.0-weight);
5069 weight+=1.0/control_points;
5072 Bezier curves are just short segmented polys.
5075 for (i=0; i < (ssize_t) control_points; i++)
5077 TracePoint(p,points[i]);
5082 primitive_info->coordinates=(size_t) (p-primitive_info);
5083 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5085 p->primitive=primitive_info->primitive;
5088 points=(PointInfo *) RelinquishMagickMemory(points);
5089 coefficients=(MagickRealType *) RelinquishMagickMemory(coefficients);
5092 static void TraceCircle(PrimitiveInfo *primitive_info,const PointInfo start,
5093 const PointInfo end)
5104 alpha=end.x-start.x;
5106 radius=hypot((double) alpha,(double) beta);
5107 offset.x=(double) radius;
5108 offset.y=(double) radius;
5111 TraceEllipse(primitive_info,start,offset,degrees);
5114 static void TraceEllipse(PrimitiveInfo *primitive_info,const PointInfo start,
5115 const PointInfo stop,const PointInfo degrees)
5126 register PrimitiveInfo
5133 Ellipses are just short segmented polys.
5135 if ((stop.x == 0.0) && (stop.y == 0.0))
5137 TracePoint(primitive_info,start);
5140 delta=2.0/MagickMax(stop.x,stop.y);
5141 step=(MagickRealType) (MagickPI/8.0);
5142 if ((delta >= 0.0) && (delta < (MagickRealType) (MagickPI/8.0)))
5143 step=(MagickRealType) (MagickPI/(4*(MagickPI/delta/2+0.5)));
5144 angle.x=DegreesToRadians(degrees.x);
5146 while (y < degrees.x)
5148 angle.y=(double) (DegreesToRadians(y)-MagickEpsilon);
5149 for (p=primitive_info; angle.x < angle.y; angle.x+=step)
5151 point.x=cos(fmod(angle.x,DegreesToRadians(360.0)))*stop.x+start.x;
5152 point.y=sin(fmod(angle.x,DegreesToRadians(360.0)))*stop.y+start.y;
5153 TracePoint(p,point);
5156 point.x=cos(fmod(angle.y,DegreesToRadians(360.0)))*stop.x+start.x;
5157 point.y=sin(fmod(angle.y,DegreesToRadians(360.0)))*stop.y+start.y;
5158 TracePoint(p,point);
5160 primitive_info->coordinates=(size_t) (p-primitive_info);
5161 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5163 p->primitive=primitive_info->primitive;
5168 static void TraceLine(PrimitiveInfo *primitive_info,const PointInfo start,
5169 const PointInfo end)
5171 TracePoint(primitive_info,start);
5172 if ((fabs(start.x-end.x) <= MagickEpsilon) &&
5173 (fabs(start.y-end.y) <= MagickEpsilon))
5175 primitive_info->primitive=PointPrimitive;
5176 primitive_info->coordinates=1;
5179 TracePoint(primitive_info+1,end);
5180 (primitive_info+1)->primitive=primitive_info->primitive;
5181 primitive_info->coordinates=2;
5184 static size_t TracePath(PrimitiveInfo *primitive_info,const char *path)
5187 token[MaxTextExtent];
5209 register PrimitiveInfo
5224 number_coordinates=0;
5226 primitive_type=primitive_info->primitive;
5228 for (p=path; *p != '\0'; )
5230 while (isspace((int) ((unsigned char) *p)) != 0)
5234 last_attribute=attribute;
5235 attribute=(int) (*p++);
5256 GetMagickToken(p,&p,token);
5258 GetMagickToken(p,&p,token);
5259 arc.x=StringToDouble(token,(char **) NULL);
5260 GetMagickToken(p,&p,token);
5262 GetMagickToken(p,&p,token);
5263 arc.y=StringToDouble(token,(char **) NULL);
5264 GetMagickToken(p,&p,token);
5266 GetMagickToken(p,&p,token);
5267 angle=StringToDouble(token,(char **) NULL);
5268 GetMagickToken(p,&p,token);
5270 GetMagickToken(p,&p,token);
5271 large_arc=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
5272 GetMagickToken(p,&p,token);
5274 GetMagickToken(p,&p,token);
5275 sweep=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
5276 GetMagickToken(p,&p,token);
5278 GetMagickToken(p,&p,token);
5279 x=StringToDouble(token,(char **) NULL);
5280 GetMagickToken(p,&p,token);
5282 GetMagickToken(p,&p,token);
5283 y=StringToDouble(token,(char **) NULL);
5284 end.x=(double) (attribute == (int) 'A' ? x : point.x+x);
5285 end.y=(double) (attribute == (int) 'A' ? y : point.y+y);
5286 TraceArcPath(q,point,end,arc,angle,large_arc,sweep);
5289 } while (IsPoint(p) != MagickFalse);
5296 Compute bezier points.
5301 for (i=1; i < 4; i++)
5303 GetMagickToken(p,&p,token);
5305 GetMagickToken(p,&p,token);
5306 x=StringToDouble(token,(char **) NULL);
5307 GetMagickToken(p,&p,token);
5309 GetMagickToken(p,&p,token);
5310 y=StringToDouble(token,(char **) NULL);
5311 end.x=(double) (attribute == (int) 'C' ? x : point.x+x);
5312 end.y=(double) (attribute == (int) 'C' ? y : point.y+y);
5315 for (i=0; i < 4; i++)
5316 (q+i)->point=points[i];
5320 } while (IsPoint(p) != MagickFalse);
5328 GetMagickToken(p,&p,token);
5330 GetMagickToken(p,&p,token);
5331 x=StringToDouble(token,(char **) NULL);
5332 point.x=(double) (attribute == (int) 'H' ? x: point.x+x);
5333 TracePoint(q,point);
5335 } while (IsPoint(p) != MagickFalse);
5343 GetMagickToken(p,&p,token);
5345 GetMagickToken(p,&p,token);
5346 x=StringToDouble(token,(char **) NULL);
5347 GetMagickToken(p,&p,token);
5349 GetMagickToken(p,&p,token);
5350 y=StringToDouble(token,(char **) NULL);
5351 point.x=(double) (attribute == (int) 'L' ? x : point.x+x);
5352 point.y=(double) (attribute == (int) 'L' ? y : point.y+y);
5353 TracePoint(q,point);
5355 } while (IsPoint(p) != MagickFalse);
5361 if (q != primitive_info)
5363 primitive_info->coordinates=(size_t) (q-primitive_info);
5364 number_coordinates+=primitive_info->coordinates;
5370 GetMagickToken(p,&p,token);
5372 GetMagickToken(p,&p,token);
5373 x=StringToDouble(token,(char **) NULL);
5374 GetMagickToken(p,&p,token);
5376 GetMagickToken(p,&p,token);
5377 y=StringToDouble(token,(char **) NULL);
5378 point.x=(double) (attribute == (int) 'M' ? x : point.x+x);
5379 point.y=(double) (attribute == (int) 'M' ? y : point.y+y);
5383 TracePoint(q,point);
5385 if ((i != 0) && (attribute == (int) 'M'))
5387 TracePoint(q,point);
5390 } while (IsPoint(p) != MagickFalse);
5397 Compute bezier points.
5402 for (i=1; i < 3; i++)
5404 GetMagickToken(p,&p,token);
5406 GetMagickToken(p,&p,token);
5407 x=StringToDouble(token,(char **) NULL);
5408 GetMagickToken(p,&p,token);
5410 GetMagickToken(p,&p,token);
5411 y=StringToDouble(token,(char **) NULL);
5414 end.x=(double) (attribute == (int) 'Q' ? x : point.x+x);
5415 end.y=(double) (attribute == (int) 'Q' ? y : point.y+y);
5418 for (i=0; i < 3; i++)
5419 (q+i)->point=points[i];
5423 } while (IsPoint(p) != MagickFalse);
5430 Compute bezier points.
5434 points[0]=points[3];
5435 points[1].x=2.0*points[3].x-points[2].x;
5436 points[1].y=2.0*points[3].y-points[2].y;
5437 for (i=2; i < 4; i++)
5439 GetMagickToken(p,&p,token);
5441 GetMagickToken(p,&p,token);
5442 x=StringToDouble(token,(char **) NULL);
5443 GetMagickToken(p,&p,token);
5445 GetMagickToken(p,&p,token);
5446 y=StringToDouble(token,(char **) NULL);
5449 end.x=(double) (attribute == (int) 'S' ? x : point.x+x);
5450 end.y=(double) (attribute == (int) 'S' ? y : point.y+y);
5453 if (strchr("CcSs",last_attribute) == (char *) NULL)
5455 points[0]=points[2];
5456 points[1]=points[3];
5458 for (i=0; i < 4; i++)
5459 (q+i)->point=points[i];
5463 } while (IsPoint(p) != MagickFalse);
5470 Compute bezier points.
5474 points[0]=points[2];
5475 points[1].x=2.0*points[2].x-points[1].x;
5476 points[1].y=2.0*points[2].y-points[1].y;
5477 for (i=2; i < 3; i++)
5479 GetMagickToken(p,&p,token);
5481 GetMagickToken(p,&p,token);
5482 x=StringToDouble(token,(char **) NULL);
5483 GetMagickToken(p,&p,token);
5485 GetMagickToken(p,&p,token);
5486 y=StringToDouble(token,(char **) NULL);
5487 end.x=(double) (attribute == (int) 'T' ? x : point.x+x);
5488 end.y=(double) (attribute == (int) 'T' ? y : point.y+y);
5491 if (strchr("QqTt",last_attribute) == (char *) NULL)
5493 points[0]=points[2];
5494 points[1]=points[3];
5496 for (i=0; i < 3; i++)
5497 (q+i)->point=points[i];
5501 } while (IsPoint(p) != MagickFalse);
5509 GetMagickToken(p,&p,token);
5511 GetMagickToken(p,&p,token);
5512 y=StringToDouble(token,(char **) NULL);
5513 point.y=(double) (attribute == (int) 'V' ? y : point.y+y);
5514 TracePoint(q,point);
5516 } while (IsPoint(p) != MagickFalse);
5523 TracePoint(q,point);
5525 primitive_info->coordinates=(size_t) (q-primitive_info);
5526 number_coordinates+=primitive_info->coordinates;
5533 if (isalpha((int) ((unsigned char) attribute)) != 0)
5534 (void) fprintf(stderr,"attribute not recognized: %c\n",attribute);
5539 primitive_info->coordinates=(size_t) (q-primitive_info);
5540 number_coordinates+=primitive_info->coordinates;
5541 for (i=0; i < (ssize_t) number_coordinates; i++)
5544 q->primitive=primitive_type;
5546 q->method=FillToBorderMethod;
5549 return(number_coordinates);
5552 static void TraceRectangle(PrimitiveInfo *primitive_info,const PointInfo start,
5553 const PointInfo end)
5558 register PrimitiveInfo
5565 TracePoint(p,start);
5569 TracePoint(p,point);
5575 TracePoint(p,point);
5577 TracePoint(p,start);
5579 primitive_info->coordinates=(size_t) (p-primitive_info);
5580 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5582 p->primitive=primitive_info->primitive;
5587 static void TraceRoundRectangle(PrimitiveInfo *primitive_info,
5588 const PointInfo start,const PointInfo end,PointInfo arc)
5595 register PrimitiveInfo
5602 offset.x=fabs(end.x-start.x);
5603 offset.y=fabs(end.y-start.y);
5604 if (arc.x > (0.5*offset.x))
5606 if (arc.y > (0.5*offset.y))
5608 point.x=start.x+offset.x-arc.x;
5609 point.y=start.y+arc.y;
5612 TraceEllipse(p,point,arc,degrees);
5614 point.x=start.x+offset.x-arc.x;
5615 point.y=start.y+offset.y-arc.y;
5618 TraceEllipse(p,point,arc,degrees);
5620 point.x=start.x+arc.x;
5621 point.y=start.y+offset.y-arc.y;
5624 TraceEllipse(p,point,arc,degrees);
5626 point.x=start.x+arc.x;
5627 point.y=start.y+arc.y;
5630 TraceEllipse(p,point,arc,degrees);
5632 TracePoint(p,primitive_info->point);
5634 primitive_info->coordinates=(size_t) (p-primitive_info);
5635 for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
5637 p->primitive=primitive_info->primitive;
5642 static void TraceSquareLinecap(PrimitiveInfo *primitive_info,
5643 const size_t number_vertices,const MagickRealType offset)
5648 register MagickRealType
5660 for (i=1; i < (ssize_t) number_vertices; i++)
5662 dx=primitive_info[0].point.x-primitive_info[i].point.x;
5663 dy=primitive_info[0].point.y-primitive_info[i].point.y;
5664 if ((fabs((double) dx) >= MagickEpsilon) ||
5665 (fabs((double) dy) >= MagickEpsilon))
5668 if (i == (ssize_t) number_vertices)
5669 i=(ssize_t) number_vertices-1L;
5670 distance=hypot((double) dx,(double) dy);
5671 primitive_info[0].point.x=(double) (primitive_info[i].point.x+
5672 dx*(distance+offset)/distance);
5673 primitive_info[0].point.y=(double) (primitive_info[i].point.y+
5674 dy*(distance+offset)/distance);
5675 for (j=(ssize_t) number_vertices-2; j >= 0; j--)
5677 dx=primitive_info[number_vertices-1].point.x-primitive_info[j].point.x;
5678 dy=primitive_info[number_vertices-1].point.y-primitive_info[j].point.y;
5679 if ((fabs((double) dx) >= MagickEpsilon) ||
5680 (fabs((double) dy) >= MagickEpsilon))
5683 distance=hypot((double) dx,(double) dy);
5684 primitive_info[number_vertices-1].point.x=(double) (primitive_info[j].point.x+
5685 dx*(distance+offset)/distance);
5686 primitive_info[number_vertices-1].point.y=(double) (primitive_info[j].point.y+
5687 dy*(distance+offset)/distance);
5690 static PrimitiveInfo *TraceStrokePolygon(const DrawInfo *draw_info,
5691 const PrimitiveInfo *primitive_info)
5693 typedef struct _LineSegment
5745 number_vertices=primitive_info->coordinates;
5746 max_strokes=2*number_vertices+6*BezierQuantum+360;
5747 path_p=(PointInfo *) AcquireQuantumMemory((size_t) max_strokes,
5749 path_q=(PointInfo *) AcquireQuantumMemory((size_t) max_strokes,
5751 polygon_primitive=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
5752 number_vertices+2UL,sizeof(*polygon_primitive));
5753 if ((path_p == (PointInfo *) NULL) || (path_q == (PointInfo *) NULL) ||
5754 (polygon_primitive == (PrimitiveInfo *) NULL))
5755 return((PrimitiveInfo *) NULL);
5756 (void) CopyMagickMemory(polygon_primitive,primitive_info,(size_t)
5757 number_vertices*sizeof(*polygon_primitive));
5759 (primitive_info[number_vertices-1].point.x == primitive_info[0].point.x) &&
5760 (primitive_info[number_vertices-1].point.y == primitive_info[0].point.y) ?
5761 MagickTrue : MagickFalse;
5762 if ((draw_info->linejoin == RoundJoin) ||
5763 ((draw_info->linejoin == MiterJoin) && (closed_path != MagickFalse)))
5765 polygon_primitive[number_vertices]=primitive_info[1];
5768 polygon_primitive[number_vertices].primitive=UndefinedPrimitive;
5770 Compute the slope for the first line segment, p.
5774 for (n=1; n < (ssize_t) number_vertices; n++)
5776 dx.p=polygon_primitive[n].point.x-polygon_primitive[0].point.x;
5777 dy.p=polygon_primitive[n].point.y-polygon_primitive[0].point.y;
5778 if ((fabs(dx.p) >= MagickEpsilon) || (fabs(dy.p) >= MagickEpsilon))
5781 if (n == (ssize_t) number_vertices)
5782 n=(ssize_t) number_vertices-1L;
5784 inverse_slope.p=0.0;
5785 if (fabs(dx.p) <= MagickEpsilon)
5788 slope.p=dy.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
5790 slope.p=dy.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
5793 if (fabs(dy.p) <= MagickEpsilon)
5796 inverse_slope.p=dx.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
5798 inverse_slope.p=dx.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
5803 inverse_slope.p=(-1.0/slope.p);
5805 mid=ExpandAffine(&draw_info->affine)*draw_info->stroke_width/2.0;
5806 miterlimit=(MagickRealType) (draw_info->miterlimit*draw_info->miterlimit*
5808 if ((draw_info->linecap == SquareCap) && (closed_path == MagickFalse))
5809 TraceSquareLinecap(polygon_primitive,number_vertices,mid);
5810 offset.x=sqrt((double) (mid*mid/(inverse_slope.p*inverse_slope.p+1.0)));
5811 offset.y=(double) (offset.x*inverse_slope.p);
5812 if ((dy.p*offset.x-dx.p*offset.y) > 0.0)
5814 box_p[0].x=polygon_primitive[0].point.x-offset.x;
5815 box_p[0].y=polygon_primitive[0].point.y-offset.x*inverse_slope.p;
5816 box_p[1].x=polygon_primitive[n].point.x-offset.x;
5817 box_p[1].y=polygon_primitive[n].point.y-offset.x*inverse_slope.p;
5818 box_q[0].x=polygon_primitive[0].point.x+offset.x;
5819 box_q[0].y=polygon_primitive[0].point.y+offset.x*inverse_slope.p;
5820 box_q[1].x=polygon_primitive[n].point.x+offset.x;
5821 box_q[1].y=polygon_primitive[n].point.y+offset.x*inverse_slope.p;
5825 box_p[0].x=polygon_primitive[0].point.x+offset.x;
5826 box_p[0].y=polygon_primitive[0].point.y+offset.y;
5827 box_p[1].x=polygon_primitive[n].point.x+offset.x;
5828 box_p[1].y=polygon_primitive[n].point.y+offset.y;
5829 box_q[0].x=polygon_primitive[0].point.x-offset.x;
5830 box_q[0].y=polygon_primitive[0].point.y-offset.y;
5831 box_q[1].x=polygon_primitive[n].point.x-offset.x;
5832 box_q[1].y=polygon_primitive[n].point.y-offset.y;
5835 Create strokes for the line join attribute: bevel, miter, round.
5839 path_q[p++]=box_q[0];
5840 path_p[q++]=box_p[0];
5841 for (i=(ssize_t) n+1; i < (ssize_t) number_vertices; i++)
5844 Compute the slope for this line segment, q.
5846 dx.q=polygon_primitive[i].point.x-polygon_primitive[n].point.x;
5847 dy.q=polygon_primitive[i].point.y-polygon_primitive[n].point.y;
5848 dot_product=dx.q*dx.q+dy.q*dy.q;
5849 if (dot_product < 0.25)
5852 inverse_slope.q=0.0;
5853 if (fabs(dx.q) < MagickEpsilon)
5856 slope.q=dy.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
5858 slope.q=dy.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
5861 if (fabs(dy.q) <= MagickEpsilon)
5864 inverse_slope.q=dx.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
5866 inverse_slope.q=dx.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
5871 inverse_slope.q=(-1.0/slope.q);
5873 offset.x=sqrt((double) (mid*mid/(inverse_slope.q*inverse_slope.q+1.0)));
5874 offset.y=(double) (offset.x*inverse_slope.q);
5875 dot_product=dy.q*offset.x-dx.q*offset.y;
5876 if (dot_product > 0.0)
5878 box_p[2].x=polygon_primitive[n].point.x-offset.x;
5879 box_p[2].y=polygon_primitive[n].point.y-offset.y;
5880 box_p[3].x=polygon_primitive[i].point.x-offset.x;
5881 box_p[3].y=polygon_primitive[i].point.y-offset.y;
5882 box_q[2].x=polygon_primitive[n].point.x+offset.x;
5883 box_q[2].y=polygon_primitive[n].point.y+offset.y;
5884 box_q[3].x=polygon_primitive[i].point.x+offset.x;
5885 box_q[3].y=polygon_primitive[i].point.y+offset.y;
5889 box_p[2].x=polygon_primitive[n].point.x+offset.x;
5890 box_p[2].y=polygon_primitive[n].point.y+offset.y;
5891 box_p[3].x=polygon_primitive[i].point.x+offset.x;
5892 box_p[3].y=polygon_primitive[i].point.y+offset.y;
5893 box_q[2].x=polygon_primitive[n].point.x-offset.x;
5894 box_q[2].y=polygon_primitive[n].point.y-offset.y;
5895 box_q[3].x=polygon_primitive[i].point.x-offset.x;
5896 box_q[3].y=polygon_primitive[i].point.y-offset.y;
5898 if (fabs((double) (slope.p-slope.q)) <= MagickEpsilon)
5905 box_p[4].x=(double) ((slope.p*box_p[0].x-box_p[0].y-slope.q*box_p[3].x+
5906 box_p[3].y)/(slope.p-slope.q));
5907 box_p[4].y=(double) (slope.p*(box_p[4].x-box_p[0].x)+box_p[0].y);
5908 box_q[4].x=(double) ((slope.p*box_q[0].x-box_q[0].y-slope.q*box_q[3].x+
5909 box_q[3].y)/(slope.p-slope.q));
5910 box_q[4].y=(double) (slope.p*(box_q[4].x-box_q[0].x)+box_q[0].y);
5912 if (q >= (ssize_t) (max_strokes-6*BezierQuantum-360))
5914 max_strokes+=6*BezierQuantum+360;
5915 path_p=(PointInfo *) ResizeQuantumMemory(path_p,(size_t) max_strokes,
5917 path_q=(PointInfo *) ResizeQuantumMemory(path_q,(size_t) max_strokes,
5919 if ((path_p == (PointInfo *) NULL) || (path_q == (PointInfo *) NULL))
5921 polygon_primitive=(PrimitiveInfo *)
5922 RelinquishMagickMemory(polygon_primitive);
5923 return((PrimitiveInfo *) NULL);
5926 dot_product=dx.q*dy.p-dx.p*dy.q;
5927 if (dot_product <= 0.0)
5928 switch (draw_info->linejoin)
5932 path_q[q++]=box_q[1];
5933 path_q[q++]=box_q[2];
5934 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
5935 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
5936 if (dot_product <= miterlimit)
5937 path_p[p++]=box_p[4];
5940 path_p[p++]=box_p[1];
5941 path_p[p++]=box_p[2];
5947 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
5948 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
5949 if (dot_product <= miterlimit)
5951 path_q[q++]=box_q[4];
5952 path_p[p++]=box_p[4];
5956 path_q[q++]=box_q[1];
5957 path_q[q++]=box_q[2];
5958 path_p[p++]=box_p[1];
5959 path_p[p++]=box_p[2];
5965 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
5966 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
5967 if (dot_product <= miterlimit)
5968 path_p[p++]=box_p[4];
5971 path_p[p++]=box_p[1];
5972 path_p[p++]=box_p[2];
5974 center=polygon_primitive[n].point;
5975 theta.p=atan2(box_q[1].y-center.y,box_q[1].x-center.x);
5976 theta.q=atan2(box_q[2].y-center.y,box_q[2].x-center.x);
5977 if (theta.q < theta.p)
5978 theta.q+=(MagickRealType) (2.0*MagickPI);
5979 arc_segments=(size_t) ceil((double) ((theta.q-theta.p)/
5980 (2.0*sqrt((double) (1.0/mid)))));
5981 path_q[q].x=box_q[1].x;
5982 path_q[q].y=box_q[1].y;
5984 for (j=1; j < (ssize_t) arc_segments; j++)
5986 delta_theta=(MagickRealType) (j*(theta.q-theta.p)/arc_segments);
5987 path_q[q].x=(double) (center.x+mid*cos(fmod((double)
5988 (theta.p+delta_theta),DegreesToRadians(360.0))));
5989 path_q[q].y=(double) (center.y+mid*sin(fmod((double)
5990 (theta.p+delta_theta),DegreesToRadians(360.0))));
5993 path_q[q++]=box_q[2];
6000 switch (draw_info->linejoin)
6004 path_p[p++]=box_p[1];
6005 path_p[p++]=box_p[2];
6006 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
6007 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
6008 if (dot_product <= miterlimit)
6009 path_q[q++]=box_q[4];
6012 path_q[q++]=box_q[1];
6013 path_q[q++]=box_q[2];
6019 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
6020 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
6021 if (dot_product <= miterlimit)
6023 path_q[q++]=box_q[4];
6024 path_p[p++]=box_p[4];
6028 path_q[q++]=box_q[1];
6029 path_q[q++]=box_q[2];
6030 path_p[p++]=box_p[1];
6031 path_p[p++]=box_p[2];
6037 dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
6038 (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
6039 if (dot_product <= miterlimit)
6040 path_q[q++]=box_q[4];
6043 path_q[q++]=box_q[1];
6044 path_q[q++]=box_q[2];
6046 center=polygon_primitive[n].point;
6047 theta.p=atan2(box_p[1].y-center.y,box_p[1].x-center.x);
6048 theta.q=atan2(box_p[2].y-center.y,box_p[2].x-center.x);
6049 if (theta.p < theta.q)
6050 theta.p+=(MagickRealType) (2.0*MagickPI);
6051 arc_segments=(size_t) ceil((double) ((theta.p-theta.q)/
6052 (2.0*sqrt((double) (1.0/mid)))));
6053 path_p[p++]=box_p[1];
6054 for (j=1; j < (ssize_t) arc_segments; j++)
6056 delta_theta=(MagickRealType) (j*(theta.q-theta.p)/arc_segments);
6057 path_p[p].x=(double) (center.x+mid*cos(fmod((double)
6058 (theta.p+delta_theta),DegreesToRadians(360.0))));
6059 path_p[p].y=(double) (center.y+mid*sin(fmod((double)
6060 (theta.p+delta_theta),DegreesToRadians(360.0))));
6063 path_p[p++]=box_p[2];
6070 inverse_slope.p=inverse_slope.q;
6079 path_p[p++]=box_p[1];
6080 path_q[q++]=box_q[1];
6082 Trace stroked polygon.
6084 stroke_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
6085 (p+q+2UL*closed_path+2UL),sizeof(*stroke_polygon));
6086 if (stroke_polygon != (PrimitiveInfo *) NULL)
6088 for (i=0; i < (ssize_t) p; i++)
6090 stroke_polygon[i]=polygon_primitive[0];
6091 stroke_polygon[i].point=path_p[i];
6093 if (closed_path != MagickFalse)
6095 stroke_polygon[i]=polygon_primitive[0];
6096 stroke_polygon[i].point=stroke_polygon[0].point;
6099 for ( ; i < (ssize_t) (p+q+closed_path); i++)
6101 stroke_polygon[i]=polygon_primitive[0];
6102 stroke_polygon[i].point=path_q[p+q+closed_path-(i+1)];
6104 if (closed_path != MagickFalse)
6106 stroke_polygon[i]=polygon_primitive[0];
6107 stroke_polygon[i].point=stroke_polygon[p+closed_path].point;
6110 stroke_polygon[i]=polygon_primitive[0];
6111 stroke_polygon[i].point=stroke_polygon[0].point;
6113 stroke_polygon[i].primitive=UndefinedPrimitive;
6114 stroke_polygon[0].coordinates=(size_t) (p+q+2*closed_path+1);
6116 path_p=(PointInfo *) RelinquishMagickMemory(path_p);
6117 path_q=(PointInfo *) RelinquishMagickMemory(path_q);
6118 polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(polygon_primitive);
6119 return(stroke_polygon);