/MagickCore/draw.c
C | 7487 lines | 6298 code | 331 blank | 858 comment | 1382 complexity | 21ae1370ce1858972c291d10c68a9f34 MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % DDDD RRRR AAA W W %
- % D D R R A A W W %
- % D D RRRR AAAAA W W W %
- % D D R RN A A WW WW %
- % DDDD R R A A W W %
- % %
- % %
- % MagickCore Image Drawing Methods %
- % %
- % %
- % Software Design %
- % Cristy %
- % July 1998 %
- % %
- % %
- % Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization %
- % dedicated to making software imaging solutions freely available. %
- % %
- % You may not use this file except in compliance with the License. You may %
- % obtain a copy of the License at %
- % %
- % https://imagemagick.org/script/license.php %
- % %
- % Unless required by applicable law or agreed to in writing, software %
- % distributed under the License is distributed on an "AS IS" BASIS, %
- % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
- % See the License for the specific language governing permissions and %
- % limitations under the License. %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % Bill Radcliffe of Corbis (www.corbis.com) contributed the polygon
- % rendering code based on Paul Heckbert's "Concave Polygon Scan Conversion",
- % Graphics Gems, 1990. Leonard Rosenthal and David Harr of Appligent
- % (www.appligent.com) contributed the dash pattern, linecap stroking
- % algorithm, and minor rendering improvements.
- %
- */
- /*
- Include declarations.
- */
- #include "MagickCore/studio.h"
- #include "MagickCore/annotate.h"
- #include "MagickCore/artifact.h"
- #include "MagickCore/blob.h"
- #include "MagickCore/cache.h"
- #include "MagickCore/cache-private.h"
- #include "MagickCore/cache-view.h"
- #include "MagickCore/channel.h"
- #include "MagickCore/color.h"
- #include "MagickCore/colorspace-private.h"
- #include "MagickCore/composite.h"
- #include "MagickCore/composite-private.h"
- #include "MagickCore/constitute.h"
- #include "MagickCore/draw.h"
- #include "MagickCore/draw-private.h"
- #include "MagickCore/enhance.h"
- #include "MagickCore/exception.h"
- #include "MagickCore/exception-private.h"
- #include "MagickCore/gem.h"
- #include "MagickCore/geometry.h"
- #include "MagickCore/image-private.h"
- #include "MagickCore/list.h"
- #include "MagickCore/log.h"
- #include "MagickCore/memory-private.h"
- #include "MagickCore/monitor.h"
- #include "MagickCore/monitor-private.h"
- #include "MagickCore/option.h"
- #include "MagickCore/paint.h"
- #include "MagickCore/pixel-accessor.h"
- #include "MagickCore/pixel-private.h"
- #include "MagickCore/property.h"
- #include "MagickCore/resample.h"
- #include "MagickCore/resample-private.h"
- #include "MagickCore/resource_.h"
- #include "MagickCore/splay-tree.h"
- #include "MagickCore/string_.h"
- #include "MagickCore/string-private.h"
- #include "MagickCore/thread-private.h"
- #include "MagickCore/token.h"
- #include "MagickCore/transform-private.h"
- #include "MagickCore/utility.h"
- /*
- Define declarations.
- */
- #define BezierQuantum 200
- #define PrimitiveExtentPad 2048
- #define MaxBezierCoordinates 4194304
- #define ThrowPointExpectedException(token,exception) \
- { \
- (void) ThrowMagickException(exception,GetMagickModule(),DrawError, \
- "NonconformingDrawingPrimitiveDefinition","`%s'",token); \
- status=MagickFalse; \
- break; \
- }
- /*
- Typedef declarations.
- */
- typedef struct _EdgeInfo
- {
- SegmentInfo
- bounds;
- double
- scanline;
- PointInfo
- *points;
- size_t
- number_points;
- ssize_t
- direction;
- MagickBooleanType
- ghostline;
- size_t
- highwater;
- } EdgeInfo;
- typedef struct _ElementInfo
- {
- double
- cx,
- cy,
- major,
- minor,
- angle;
- } ElementInfo;
- typedef struct _MVGInfo
- {
- PrimitiveInfo
- **primitive_info;
- size_t
- *extent;
- ssize_t
- offset;
- PointInfo
- point;
- ExceptionInfo
- *exception;
- } MVGInfo;
- typedef struct _PolygonInfo
- {
- EdgeInfo
- *edges;
- size_t
- number_edges;
- } PolygonInfo;
- typedef enum
- {
- MoveToCode,
- OpenCode,
- GhostlineCode,
- LineToCode,
- EndCode
- } PathInfoCode;
- typedef struct _PathInfo
- {
- PointInfo
- point;
- PathInfoCode
- code;
- } PathInfo;
- /*
- Forward declarations.
- */
- static Image
- *DrawClippingMask(Image *,const DrawInfo *,const char *,const char *,
- ExceptionInfo *);
- static MagickBooleanType
- DrawStrokePolygon(Image *,const DrawInfo *,const PrimitiveInfo *,
- ExceptionInfo *),
- RenderMVGContent(Image *,const DrawInfo *,const size_t,ExceptionInfo *),
- TraceArc(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
- TraceArcPath(MVGInfo *,const PointInfo,const PointInfo,const PointInfo,
- const double,const MagickBooleanType,const MagickBooleanType),
- TraceBezier(MVGInfo *,const size_t),
- TraceCircle(MVGInfo *,const PointInfo,const PointInfo),
- TraceEllipse(MVGInfo *,const PointInfo,const PointInfo,const PointInfo),
- TraceLine(PrimitiveInfo *,const PointInfo,const PointInfo),
- TraceRectangle(PrimitiveInfo *,const PointInfo,const PointInfo),
- TraceRoundRectangle(MVGInfo *,const PointInfo,const PointInfo,PointInfo),
- TraceSquareLinecap(PrimitiveInfo *,const size_t,const double);
- static PrimitiveInfo
- *TraceStrokePolygon(const Image *,const DrawInfo *,const PrimitiveInfo *);
- static size_t
- TracePath(MVGInfo *,const char *,ExceptionInfo *);
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % A c q u i r e D r a w I n f o %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % AcquireDrawInfo() returns a DrawInfo structure properly initialized.
- %
- % The format of the AcquireDrawInfo method is:
- %
- % DrawInfo *AcquireDrawInfo(void)
- %
- */
- MagickExport DrawInfo *AcquireDrawInfo(void)
- {
- DrawInfo
- *draw_info;
- draw_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*draw_info));
- GetDrawInfo((ImageInfo *) NULL,draw_info);
- return(draw_info);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % C l o n e D r a w I n f o %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % CloneDrawInfo() makes a copy of the given draw_info structure. If NULL
- % is specified, a new DrawInfo structure is created initialized to default
- % values.
- %
- % The format of the CloneDrawInfo method is:
- %
- % DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
- % const DrawInfo *draw_info)
- %
- % A description of each parameter follows:
- %
- % o image_info: the image info.
- %
- % o draw_info: the draw info.
- %
- */
- MagickExport DrawInfo *CloneDrawInfo(const ImageInfo *image_info,
- const DrawInfo *draw_info)
- {
- DrawInfo
- *clone_info;
- ExceptionInfo
- *exception;
- clone_info=(DrawInfo *) AcquireCriticalMemory(sizeof(*clone_info));
- GetDrawInfo(image_info,clone_info);
- if (draw_info == (DrawInfo *) NULL)
- return(clone_info);
- exception=AcquireExceptionInfo();
- if (draw_info->primitive != (char *) NULL)
- (void) CloneString(&clone_info->primitive,draw_info->primitive);
- if (draw_info->geometry != (char *) NULL)
- (void) CloneString(&clone_info->geometry,draw_info->geometry);
- clone_info->compliance=draw_info->compliance;
- clone_info->viewbox=draw_info->viewbox;
- clone_info->affine=draw_info->affine;
- clone_info->gravity=draw_info->gravity;
- clone_info->fill=draw_info->fill;
- clone_info->stroke=draw_info->stroke;
- clone_info->stroke_width=draw_info->stroke_width;
- if (draw_info->fill_pattern != (Image *) NULL)
- clone_info->fill_pattern=CloneImage(draw_info->fill_pattern,0,0,MagickTrue,
- exception);
- if (draw_info->stroke_pattern != (Image *) NULL)
- clone_info->stroke_pattern=CloneImage(draw_info->stroke_pattern,0,0,
- MagickTrue,exception);
- clone_info->stroke_antialias=draw_info->stroke_antialias;
- clone_info->text_antialias=draw_info->text_antialias;
- clone_info->fill_rule=draw_info->fill_rule;
- clone_info->linecap=draw_info->linecap;
- clone_info->linejoin=draw_info->linejoin;
- clone_info->miterlimit=draw_info->miterlimit;
- clone_info->dash_offset=draw_info->dash_offset;
- clone_info->decorate=draw_info->decorate;
- clone_info->compose=draw_info->compose;
- if (draw_info->text != (char *) NULL)
- (void) CloneString(&clone_info->text,draw_info->text);
- if (draw_info->font != (char *) NULL)
- (void) CloneString(&clone_info->font,draw_info->font);
- if (draw_info->metrics != (char *) NULL)
- (void) CloneString(&clone_info->metrics,draw_info->metrics);
- if (draw_info->family != (char *) NULL)
- (void) CloneString(&clone_info->family,draw_info->family);
- clone_info->style=draw_info->style;
- clone_info->stretch=draw_info->stretch;
- clone_info->weight=draw_info->weight;
- if (draw_info->encoding != (char *) NULL)
- (void) CloneString(&clone_info->encoding,draw_info->encoding);
- clone_info->pointsize=draw_info->pointsize;
- clone_info->kerning=draw_info->kerning;
- clone_info->interline_spacing=draw_info->interline_spacing;
- clone_info->interword_spacing=draw_info->interword_spacing;
- clone_info->direction=draw_info->direction;
- if (draw_info->density != (char *) NULL)
- (void) CloneString(&clone_info->density,draw_info->density);
- clone_info->align=draw_info->align;
- clone_info->undercolor=draw_info->undercolor;
- clone_info->border_color=draw_info->border_color;
- if (draw_info->server_name != (char *) NULL)
- (void) CloneString(&clone_info->server_name,draw_info->server_name);
- if (draw_info->dash_pattern != (double *) NULL)
- {
- register ssize_t
- x;
- for (x=0; fabs(draw_info->dash_pattern[x]) >= MagickEpsilon; x++) ;
- clone_info->dash_pattern=(double *) AcquireQuantumMemory((size_t) (2*x+2),
- sizeof(*clone_info->dash_pattern));
- if (clone_info->dash_pattern == (double *) NULL)
- ThrowFatalException(ResourceLimitFatalError,
- "UnableToAllocateDashPattern");
- (void) memset(clone_info->dash_pattern,0,(size_t) (2*x+2)*
- sizeof(*clone_info->dash_pattern));
- (void) memcpy(clone_info->dash_pattern,draw_info->dash_pattern,(size_t)
- (x+1)*sizeof(*clone_info->dash_pattern));
- }
- clone_info->gradient=draw_info->gradient;
- if (draw_info->gradient.stops != (StopInfo *) NULL)
- {
- size_t
- number_stops;
- number_stops=clone_info->gradient.number_stops;
- clone_info->gradient.stops=(StopInfo *) AcquireQuantumMemory((size_t)
- number_stops,sizeof(*clone_info->gradient.stops));
- if (clone_info->gradient.stops == (StopInfo *) NULL)
- ThrowFatalException(ResourceLimitFatalError,
- "UnableToAllocateDashPattern");
- (void) memcpy(clone_info->gradient.stops,draw_info->gradient.stops,
- (size_t) number_stops*sizeof(*clone_info->gradient.stops));
- }
- clone_info->bounds=draw_info->bounds;
- clone_info->fill_alpha=draw_info->fill_alpha;
- clone_info->stroke_alpha=draw_info->stroke_alpha;
- clone_info->element_reference=draw_info->element_reference;
- clone_info->clip_path=draw_info->clip_path;
- clone_info->clip_units=draw_info->clip_units;
- if (draw_info->clip_mask != (char *) NULL)
- (void) CloneString(&clone_info->clip_mask,draw_info->clip_mask);
- if (draw_info->clipping_mask != (Image *) NULL)
- clone_info->clipping_mask=CloneImage(draw_info->clipping_mask,0,0,
- MagickTrue,exception);
- if (draw_info->composite_mask != (Image *) NULL)
- clone_info->composite_mask=CloneImage(draw_info->composite_mask,0,0,
- MagickTrue,exception);
- clone_info->render=draw_info->render;
- clone_info->debug=IsEventLogging();
- exception=DestroyExceptionInfo(exception);
- return(clone_info);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + C o n v e r t P a t h T o P o l y g o n %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % ConvertPathToPolygon() converts a path to the more efficient sorted
- % rendering form.
- %
- % The format of the ConvertPathToPolygon method is:
- %
- % PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info)
- %
- % A description of each parameter follows:
- %
- % o Method ConvertPathToPolygon returns the path in a more efficient sorted
- % rendering form of type PolygonInfo.
- %
- % o draw_info: Specifies a pointer to an DrawInfo structure.
- %
- % o path_info: Specifies a pointer to an PathInfo structure.
- %
- %
- */
- #if defined(__cplusplus) || defined(c_plusplus)
- extern "C" {
- #endif
- static int DrawCompareEdges(const void *p_edge,const void *q_edge)
- {
- #define DrawCompareEdge(p,q) \
- { \
- if (((p)-(q)) < 0.0) \
- return(-1); \
- if (((p)-(q)) > 0.0) \
- return(1); \
- }
- register const PointInfo
- *p,
- *q;
- /*
- Edge sorting for right-handed coordinate system.
- */
- p=((const EdgeInfo *) p_edge)->points;
- q=((const EdgeInfo *) q_edge)->points;
- DrawCompareEdge(p[0].y,q[0].y);
- DrawCompareEdge(p[0].x,q[0].x);
- DrawCompareEdge((p[1].x-p[0].x)*(q[1].y-q[0].y),(p[1].y-p[0].y)*
- (q[1].x-q[0].x));
- DrawCompareEdge(p[1].y,q[1].y);
- DrawCompareEdge(p[1].x,q[1].x);
- return(0);
- }
- #if defined(__cplusplus) || defined(c_plusplus)
- }
- #endif
- static void LogPolygonInfo(const PolygonInfo *polygon_info)
- {
- register EdgeInfo
- *p;
- register ssize_t
- i,
- j;
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin active-edge");
- p=polygon_info->edges;
- for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
- {
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," edge %.20g:",
- (double) i);
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," direction: %s",
- p->direction != MagickFalse ? "down" : "up");
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," ghostline: %s",
- p->ghostline != MagickFalse ? "transparent" : "opaque");
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " bounds: %g,%g - %g,%g",p->bounds.x1,p->bounds.y1,
- p->bounds.x2,p->bounds.y2);
- for (j=0; j < (ssize_t) p->number_points; j++)
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," %g,%g",
- p->points[j].x,p->points[j].y);
- p++;
- }
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," end active-edge");
- }
- static void ReversePoints(PointInfo *points,const size_t number_points)
- {
- PointInfo
- point;
- register ssize_t
- i;
- for (i=0; i < (ssize_t) (number_points >> 1); i++)
- {
- point=points[i];
- points[i]=points[number_points-(i+1)];
- points[number_points-(i+1)]=point;
- }
- }
- static PolygonInfo *ConvertPathToPolygon(const PathInfo *path_info)
- {
- long
- direction,
- next_direction;
- PointInfo
- point,
- *points;
- PolygonInfo
- *polygon_info;
- SegmentInfo
- bounds;
- register ssize_t
- i,
- n;
- MagickBooleanType
- ghostline;
- size_t
- edge,
- number_edges,
- number_points;
- /*
- Convert a path to the more efficient sorted rendering form.
- */
- polygon_info=(PolygonInfo *) AcquireMagickMemory(sizeof(*polygon_info));
- if (polygon_info == (PolygonInfo *) NULL)
- return((PolygonInfo *) NULL);
- number_edges=16;
- polygon_info->edges=(EdgeInfo *) AcquireQuantumMemory(number_edges,
- sizeof(*polygon_info->edges));
- if (polygon_info->edges == (EdgeInfo *) NULL)
- return((PolygonInfo *) NULL);
- (void) memset(polygon_info->edges,0,number_edges*
- sizeof(*polygon_info->edges));
- direction=0;
- edge=0;
- ghostline=MagickFalse;
- n=0;
- number_points=0;
- points=(PointInfo *) NULL;
- (void) memset(&point,0,sizeof(point));
- (void) memset(&bounds,0,sizeof(bounds));
- polygon_info->edges[edge].number_points=(size_t) n;
- polygon_info->edges[edge].scanline=0.0;
- polygon_info->edges[edge].highwater=0;
- polygon_info->edges[edge].ghostline=ghostline;
- polygon_info->edges[edge].direction=(ssize_t) direction;
- polygon_info->edges[edge].points=points;
- polygon_info->edges[edge].bounds=bounds;
- polygon_info->number_edges=0;
- for (i=0; path_info[i].code != EndCode; i++)
- {
- if ((path_info[i].code == MoveToCode) || (path_info[i].code == OpenCode) ||
- (path_info[i].code == GhostlineCode))
- {
- /*
- Move to.
- */
- if ((points != (PointInfo *) NULL) && (n >= 2))
- {
- if (edge == number_edges)
- {
- number_edges<<=1;
- polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
- polygon_info->edges,(size_t) number_edges,
- sizeof(*polygon_info->edges));
- if (polygon_info->edges == (EdgeInfo *) NULL)
- return((PolygonInfo *) NULL);
- }
- polygon_info->edges[edge].number_points=(size_t) n;
- polygon_info->edges[edge].scanline=(-1.0);
- polygon_info->edges[edge].highwater=0;
- polygon_info->edges[edge].ghostline=ghostline;
- polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
- if (direction < 0)
- ReversePoints(points,(size_t) n);
- polygon_info->edges[edge].points=points;
- polygon_info->edges[edge].bounds=bounds;
- polygon_info->edges[edge].bounds.y1=points[0].y;
- polygon_info->edges[edge].bounds.y2=points[n-1].y;
- points=(PointInfo *) NULL;
- ghostline=MagickFalse;
- edge++;
- }
- if (points == (PointInfo *) NULL)
- {
- number_points=16;
- points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
- sizeof(*points));
- if (points == (PointInfo *) NULL)
- return((PolygonInfo *) NULL);
- }
- ghostline=path_info[i].code == GhostlineCode ? MagickTrue : MagickFalse;
- point=path_info[i].point;
- points[0]=point;
- bounds.x1=point.x;
- bounds.x2=point.x;
- direction=0;
- n=1;
- continue;
- }
- /*
- Line to.
- */
- next_direction=((path_info[i].point.y > point.y) ||
- ((fabs(path_info[i].point.y-point.y) < MagickEpsilon) &&
- (path_info[i].point.x > point.x))) ? 1 : -1;
- if ((points != (PointInfo *) NULL) && (direction != 0) &&
- (direction != next_direction))
- {
- /*
- New edge.
- */
- point=points[n-1];
- if (edge == number_edges)
- {
- number_edges<<=1;
- polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
- polygon_info->edges,(size_t) number_edges,
- sizeof(*polygon_info->edges));
- if (polygon_info->edges == (EdgeInfo *) NULL)
- return((PolygonInfo *) NULL);
- }
- polygon_info->edges[edge].number_points=(size_t) n;
- polygon_info->edges[edge].scanline=(-1.0);
- polygon_info->edges[edge].highwater=0;
- polygon_info->edges[edge].ghostline=ghostline;
- polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
- if (direction < 0)
- ReversePoints(points,(size_t) n);
- polygon_info->edges[edge].points=points;
- polygon_info->edges[edge].bounds=bounds;
- polygon_info->edges[edge].bounds.y1=points[0].y;
- polygon_info->edges[edge].bounds.y2=points[n-1].y;
- number_points=16;
- points=(PointInfo *) AcquireQuantumMemory((size_t) number_points,
- sizeof(*points));
- if (points == (PointInfo *) NULL)
- return((PolygonInfo *) NULL);
- n=1;
- ghostline=MagickFalse;
- points[0]=point;
- bounds.x1=point.x;
- bounds.x2=point.x;
- edge++;
- }
- direction=next_direction;
- if (points == (PointInfo *) NULL)
- continue;
- if (n == (ssize_t) number_points)
- {
- number_points<<=1;
- points=(PointInfo *) ResizeQuantumMemory(points,(size_t) number_points,
- sizeof(*points));
- if (points == (PointInfo *) NULL)
- return((PolygonInfo *) NULL);
- }
- point=path_info[i].point;
- points[n]=point;
- if (point.x < bounds.x1)
- bounds.x1=point.x;
- if (point.x > bounds.x2)
- bounds.x2=point.x;
- n++;
- }
- if (points != (PointInfo *) NULL)
- {
- if (n < 2)
- points=(PointInfo *) RelinquishMagickMemory(points);
- else
- {
- if (edge == number_edges)
- {
- number_edges<<=1;
- polygon_info->edges=(EdgeInfo *) ResizeQuantumMemory(
- polygon_info->edges,(size_t) number_edges,
- sizeof(*polygon_info->edges));
- if (polygon_info->edges == (EdgeInfo *) NULL)
- return((PolygonInfo *) NULL);
- }
- polygon_info->edges[edge].number_points=(size_t) n;
- polygon_info->edges[edge].scanline=(-1.0);
- polygon_info->edges[edge].highwater=0;
- polygon_info->edges[edge].ghostline=ghostline;
- polygon_info->edges[edge].direction=(ssize_t) (direction > 0);
- if (direction < 0)
- ReversePoints(points,(size_t) n);
- polygon_info->edges[edge].points=points;
- polygon_info->edges[edge].bounds=bounds;
- polygon_info->edges[edge].bounds.y1=points[0].y;
- polygon_info->edges[edge].bounds.y2=points[n-1].y;
- ghostline=MagickFalse;
- edge++;
- }
- }
- polygon_info->number_edges=edge;
- qsort(polygon_info->edges,(size_t) polygon_info->number_edges,
- sizeof(*polygon_info->edges),DrawCompareEdges);
- if (IsEventLogging() != MagickFalse)
- LogPolygonInfo(polygon_info);
- return(polygon_info);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + C o n v e r t P r i m i t i v e T o P a t h %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % ConvertPrimitiveToPath() converts a PrimitiveInfo structure into a vector
- % path structure.
- %
- % The format of the ConvertPrimitiveToPath method is:
- %
- % PathInfo *ConvertPrimitiveToPath(const DrawInfo *draw_info,
- % const PrimitiveInfo *primitive_info)
- %
- % A description of each parameter follows:
- %
- % o Method ConvertPrimitiveToPath returns a vector path structure of type
- % PathInfo.
- %
- % o draw_info: a structure of type DrawInfo.
- %
- % o primitive_info: Specifies a pointer to an PrimitiveInfo structure.
- %
- %
- */
- static void LogPathInfo(const PathInfo *path_info)
- {
- register const PathInfo
- *p;
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin vector-path");
- for (p=path_info; p->code != EndCode; p++)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " %g,%g %s",p->point.x,p->point.y,p->code == GhostlineCode ?
- "moveto ghostline" : p->code == OpenCode ? "moveto open" :
- p->code == MoveToCode ? "moveto" : p->code == LineToCode ? "lineto" :
- "?");
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," end vector-path");
- }
- static PathInfo *ConvertPrimitiveToPath(const PrimitiveInfo *primitive_info)
- {
- MagickBooleanType
- closed_subpath;
- PathInfo
- *path_info;
- PathInfoCode
- code;
- PointInfo
- p,
- q;
- register ssize_t
- i,
- n;
- ssize_t
- coordinates,
- start;
- /*
- Converts a PrimitiveInfo structure into a vector path structure.
- */
- switch (primitive_info->primitive)
- {
- case AlphaPrimitive:
- case ColorPrimitive:
- case ImagePrimitive:
- case PointPrimitive:
- case TextPrimitive:
- return((PathInfo *) NULL);
- default:
- break;
- }
- for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
- path_info=(PathInfo *) AcquireQuantumMemory((size_t) (3UL*i+1UL),
- sizeof(*path_info));
- if (path_info == (PathInfo *) NULL)
- return((PathInfo *) NULL);
- coordinates=0;
- closed_subpath=MagickFalse;
- n=0;
- p.x=(-1.0);
- p.y=(-1.0);
- q.x=(-1.0);
- q.y=(-1.0);
- start=0;
- for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
- {
- code=LineToCode;
- if (coordinates <= 0)
- {
- /*
- New subpath.
- */
- coordinates=(ssize_t) primitive_info[i].coordinates;
- p=primitive_info[i].point;
- start=n;
- code=MoveToCode;
- closed_subpath=primitive_info[i].closed_subpath;
- }
- coordinates--;
- if ((code == MoveToCode) || (coordinates <= 0) ||
- (fabs(q.x-primitive_info[i].point.x) >= MagickEpsilon) ||
- (fabs(q.y-primitive_info[i].point.y) >= MagickEpsilon))
- {
- /*
- Eliminate duplicate points.
- */
- path_info[n].code=code;
- path_info[n].point=primitive_info[i].point;
- q=primitive_info[i].point;
- n++;
- }
- if (coordinates > 0)
- continue; /* next point in current subpath */
- if (closed_subpath != MagickFalse)
- {
- closed_subpath=MagickFalse;
- continue;
- }
- /*
- Mark the p point as open if the subpath is not closed.
- */
- path_info[start].code=OpenCode;
- path_info[n].code=GhostlineCode;
- path_info[n].point=primitive_info[i].point;
- n++;
- path_info[n].code=LineToCode;
- path_info[n].point=p;
- n++;
- }
- path_info[n].code=EndCode;
- path_info[n].point.x=0.0;
- path_info[n].point.y=0.0;
- if (IsEventLogging() != MagickFalse)
- LogPathInfo(path_info);
- path_info=(PathInfo *) ResizeQuantumMemory(path_info,(size_t) (n+1),
- sizeof(*path_info));
- return(path_info);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D e s t r o y D r a w I n f o %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DestroyDrawInfo() deallocates memory associated with an DrawInfo structure.
- %
- % The format of the DestroyDrawInfo method is:
- %
- % DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
- %
- % A description of each parameter follows:
- %
- % o draw_info: the draw info.
- %
- */
- MagickExport DrawInfo *DestroyDrawInfo(DrawInfo *draw_info)
- {
- assert(draw_info != (DrawInfo *) NULL);
- if (draw_info->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
- assert(draw_info->signature == MagickCoreSignature);
- if (draw_info->primitive != (char *) NULL)
- draw_info->primitive=DestroyString(draw_info->primitive);
- if (draw_info->text != (char *) NULL)
- draw_info->text=DestroyString(draw_info->text);
- if (draw_info->geometry != (char *) NULL)
- draw_info->geometry=DestroyString(draw_info->geometry);
- if (draw_info->fill_pattern != (Image *) NULL)
- draw_info->fill_pattern=DestroyImage(draw_info->fill_pattern);
- if (draw_info->stroke_pattern != (Image *) NULL)
- draw_info->stroke_pattern=DestroyImage(draw_info->stroke_pattern);
- if (draw_info->font != (char *) NULL)
- draw_info->font=DestroyString(draw_info->font);
- if (draw_info->metrics != (char *) NULL)
- draw_info->metrics=DestroyString(draw_info->metrics);
- if (draw_info->family != (char *) NULL)
- draw_info->family=DestroyString(draw_info->family);
- if (draw_info->encoding != (char *) NULL)
- draw_info->encoding=DestroyString(draw_info->encoding);
- if (draw_info->density != (char *) NULL)
- draw_info->density=DestroyString(draw_info->density);
- if (draw_info->server_name != (char *) NULL)
- draw_info->server_name=(char *)
- RelinquishMagickMemory(draw_info->server_name);
- if (draw_info->dash_pattern != (double *) NULL)
- draw_info->dash_pattern=(double *) RelinquishMagickMemory(
- draw_info->dash_pattern);
- if (draw_info->gradient.stops != (StopInfo *) NULL)
- draw_info->gradient.stops=(StopInfo *) RelinquishMagickMemory(
- draw_info->gradient.stops);
- if (draw_info->clip_mask != (char *) NULL)
- draw_info->clip_mask=DestroyString(draw_info->clip_mask);
- if (draw_info->clipping_mask != (Image *) NULL)
- draw_info->clipping_mask=DestroyImage(draw_info->clipping_mask);
- if (draw_info->composite_mask != (Image *) NULL)
- draw_info->composite_mask=DestroyImage(draw_info->composite_mask);
- draw_info->signature=(~MagickCoreSignature);
- draw_info=(DrawInfo *) RelinquishMagickMemory(draw_info);
- return(draw_info);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + D e s t r o y E d g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DestroyEdge() destroys the specified polygon edge.
- %
- % The format of the DestroyEdge method is:
- %
- % ssize_t DestroyEdge(PolygonInfo *polygon_info,const int edge)
- %
- % A description of each parameter follows:
- %
- % o polygon_info: Specifies a pointer to an PolygonInfo structure.
- %
- % o edge: the polygon edge number to destroy.
- %
- */
- static size_t DestroyEdge(PolygonInfo *polygon_info,
- const size_t edge)
- {
- assert(edge < polygon_info->number_edges);
- polygon_info->edges[edge].points=(PointInfo *) RelinquishMagickMemory(
- polygon_info->edges[edge].points);
- polygon_info->number_edges--;
- if (edge < polygon_info->number_edges)
- (void) memmove(polygon_info->edges+edge,polygon_info->edges+edge+1,
- (size_t) (polygon_info->number_edges-edge)*sizeof(*polygon_info->edges));
- return(polygon_info->number_edges);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + D e s t r o y P o l y g o n I n f o %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DestroyPolygonInfo() destroys the PolygonInfo data structure.
- %
- % The format of the DestroyPolygonInfo method is:
- %
- % PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
- %
- % A description of each parameter follows:
- %
- % o polygon_info: Specifies a pointer to an PolygonInfo structure.
- %
- */
- static PolygonInfo *DestroyPolygonInfo(PolygonInfo *polygon_info)
- {
- register ssize_t
- i;
- for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
- polygon_info->edges[i].points=(PointInfo *)
- RelinquishMagickMemory(polygon_info->edges[i].points);
- polygon_info->edges=(EdgeInfo *) RelinquishMagickMemory(polygon_info->edges);
- return((PolygonInfo *) RelinquishMagickMemory(polygon_info));
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w A f f i n e I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawAffineImage() composites the source over the destination image as
- % dictated by the affine transform.
- %
- % The format of the DrawAffineImage method is:
- %
- % MagickBooleanType DrawAffineImage(Image *image,const Image *source,
- % const AffineMatrix *affine,ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o source: the source image.
- %
- % o affine: the affine transform.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static SegmentInfo AffineEdge(const Image *image,const AffineMatrix *affine,
- const double y,const SegmentInfo *edge)
- {
- double
- intercept,
- z;
- register double
- x;
- SegmentInfo
- inverse_edge;
- /*
- Determine left and right edges.
- */
- inverse_edge.x1=edge->x1;
- inverse_edge.y1=edge->y1;
- inverse_edge.x2=edge->x2;
- inverse_edge.y2=edge->y2;
- z=affine->ry*y+affine->tx;
- if (affine->sx >= MagickEpsilon)
- {
- intercept=(-z/affine->sx);
- x=intercept;
- if (x > inverse_edge.x1)
- inverse_edge.x1=x;
- intercept=(-z+(double) image->columns)/affine->sx;
- x=intercept;
- if (x < inverse_edge.x2)
- inverse_edge.x2=x;
- }
- else
- if (affine->sx < -MagickEpsilon)
- {
- intercept=(-z+(double) image->columns)/affine->sx;
- x=intercept;
- if (x > inverse_edge.x1)
- inverse_edge.x1=x;
- intercept=(-z/affine->sx);
- x=intercept;
- if (x < inverse_edge.x2)
- inverse_edge.x2=x;
- }
- else
- if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->columns))
- {
- inverse_edge.x2=edge->x1;
- return(inverse_edge);
- }
- /*
- Determine top and bottom edges.
- */
- z=affine->sy*y+affine->ty;
- if (affine->rx >= MagickEpsilon)
- {
- intercept=(-z/affine->rx);
- x=intercept;
- if (x > inverse_edge.x1)
- inverse_edge.x1=x;
- intercept=(-z+(double) image->rows)/affine->rx;
- x=intercept;
- if (x < inverse_edge.x2)
- inverse_edge.x2=x;
- }
- else
- if (affine->rx < -MagickEpsilon)
- {
- intercept=(-z+(double) image->rows)/affine->rx;
- x=intercept;
- if (x > inverse_edge.x1)
- inverse_edge.x1=x;
- intercept=(-z/affine->rx);
- x=intercept;
- if (x < inverse_edge.x2)
- inverse_edge.x2=x;
- }
- else
- if ((z < 0.0) || ((size_t) floor(z+0.5) >= image->rows))
- {
- inverse_edge.x2=edge->x2;
- return(inverse_edge);
- }
- return(inverse_edge);
- }
- static AffineMatrix InverseAffineMatrix(const AffineMatrix *affine)
- {
- AffineMatrix
- inverse_affine;
- double
- determinant;
- determinant=PerceptibleReciprocal(affine->sx*affine->sy-affine->rx*
- affine->ry);
- inverse_affine.sx=determinant*affine->sy;
- inverse_affine.rx=determinant*(-affine->rx);
- inverse_affine.ry=determinant*(-affine->ry);
- inverse_affine.sy=determinant*affine->sx;
- inverse_affine.tx=(-affine->tx)*inverse_affine.sx-affine->ty*
- inverse_affine.ry;
- inverse_affine.ty=(-affine->tx)*inverse_affine.rx-affine->ty*
- inverse_affine.sy;
- return(inverse_affine);
- }
- MagickExport MagickBooleanType DrawAffineImage(Image *image,
- const Image *source,const AffineMatrix *affine,ExceptionInfo *exception)
- {
- AffineMatrix
- inverse_affine;
- CacheView
- *image_view,
- *source_view;
- MagickBooleanType
- status;
- PixelInfo
- zero;
- PointInfo
- extent[4],
- min,
- max;
- register ssize_t
- i;
- SegmentInfo
- edge;
- ssize_t
- start,
- stop,
- y;
- /*
- Determine bounding box.
- */
- assert(image != (Image *) NULL);
- assert(image->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
- assert(source != (const Image *) NULL);
- assert(source->signature == MagickCoreSignature);
- assert(affine != (AffineMatrix *) NULL);
- extent[0].x=0.0;
- extent[0].y=0.0;
- extent[1].x=(double) source->columns-1.0;
- extent[1].y=0.0;
- extent[2].x=(double) source->columns-1.0;
- extent[2].y=(double) source->rows-1.0;
- extent[3].x=0.0;
- extent[3].y=(double) source->rows-1.0;
- for (i=0; i < 4; i++)
- {
- PointInfo
- point;
- point=extent[i];
- extent[i].x=point.x*affine->sx+point.y*affine->ry+affine->tx;
- extent[i].y=point.x*affine->rx+point.y*affine->sy+affine->ty;
- }
- min=extent[0];
- max=extent[0];
- for (i=1; i < 4; i++)
- {
- if (min.x > extent[i].x)
- min.x=extent[i].x;
- if (min.y > extent[i].y)
- min.y=extent[i].y;
- if (max.x < extent[i].x)
- max.x=extent[i].x;
- if (max.y < extent[i].y)
- max.y=extent[i].y;
- }
- /*
- Affine transform image.
- */
- if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
- return(MagickFalse);
- status=MagickTrue;
- edge.x1=MagickMax(min.x,0.0);
- edge.y1=MagickMax(min.y,0.0);
- edge.x2=MagickMin(max.x,(double) image->columns-1.0);
- edge.y2=MagickMin(max.y,(double) image->rows-1.0);
- inverse_affine=InverseAffineMatrix(affine);
- GetPixelInfo(image,&zero);
- start=(ssize_t) ceil(edge.y1-0.5);
- stop=(ssize_t) floor(edge.y2+0.5);
- source_view=AcquireVirtualCacheView(source,exception);
- image_view=AcquireAuthenticCacheView(image,exception);
- #if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static) shared(status) \
- magick_number_threads(source,image,stop-start,1)
- #endif
- for (y=start; y <= stop; y++)
- {
- PixelInfo
- composite,
- pixel;
- PointInfo
- point;
- register ssize_t
- x;
- register Quantum
- *magick_restrict q;
- SegmentInfo
- inverse_edge;
- ssize_t
- x_offset;
- inverse_edge=AffineEdge(source,&inverse_affine,(double) y,&edge);
- if (inverse_edge.x2 < inverse_edge.x1)
- continue;
- q=GetCacheViewAuthenticPixels(image_view,(ssize_t) ceil(inverse_edge.x1-
- 0.5),y,(size_t) (floor(inverse_edge.x2+0.5)-ceil(inverse_edge.x1-0.5)+1),
- 1,exception);
- if (q == (Quantum *) NULL)
- continue;
- pixel=zero;
- composite=zero;
- x_offset=0;
- for (x=(ssize_t) ceil(inverse_edge.x1-0.5); x <= (ssize_t) floor(inverse_edge.x2+0.5); x++)
- {
- point.x=(double) x*inverse_affine.sx+y*inverse_affine.ry+
- inverse_affine.tx;
- point.y=(double) x*inverse_affine.rx+y*inverse_affine.sy+
- inverse_affine.ty;
- status=InterpolatePixelInfo(source,source_view,UndefinedInterpolatePixel,
- point.x,point.y,&pixel,exception);
- if (status == MagickFalse)
- break;
- GetPixelInfoPixel(image,q,&composite);
- CompositePixelInfoOver(&pixel,pixel.alpha,&composite,composite.alpha,
- &composite);
- SetPixelViaPixelInfo(image,&composite,q);
- x_offset++;
- q+=GetPixelChannels(image);
- }
- if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
- status=MagickFalse;
- }
- source_view=DestroyCacheView(source_view);
- image_view=DestroyCacheView(image_view);
- return(status);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + D r a w B o u n d i n g R e c t a n g l e s %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawBoundingRectangles() draws the bounding rectangles on the image. This
- % is only useful for developers debugging the rendering algorithm.
- %
- % The format of the DrawBoundingRectangles method is:
- %
- % MagickBooleanType DrawBoundingRectangles(Image *image,
- % const DrawInfo *draw_info,PolygonInfo *polygon_info,
- % ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o polygon_info: Specifies a pointer to a PolygonInfo structure.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static inline double SaneStrokeWidth(const Image *image,
- const DrawInfo *draw_info)
- {
- return(MagickMin((double) draw_info->stroke_width,
- (2.0*sqrt(2.0)+MagickEpsilon)*MagickMax(image->columns,image->rows)));
- }
- static MagickBooleanType DrawBoundingRectangles(Image *image,
- const DrawInfo *draw_info,const PolygonInfo *polygon_info,
- ExceptionInfo *exception)
- {
- double
- mid;
- DrawInfo
- *clone_info;
- MagickStatusType
- status;
- PointInfo
- end,
- resolution,
- start;
- PrimitiveInfo
- primitive_info[6];
- register ssize_t
- i;
- SegmentInfo
- bounds;
- ssize_t
- coordinates;
- (void) memset(primitive_info,0,sizeof(primitive_info));
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- status=QueryColorCompliance("#000F",AllCompliance,&clone_info->fill,
- exception);
- if (status == MagickFalse)
- {
- clone_info=DestroyDrawInfo(clone_info);
- return(MagickFalse);
- }
- resolution.x=96.0;
- resolution.y=96.0;
- if (clone_info->density != (char *) NULL)
- {
- GeometryInfo
- geometry_info;
- MagickStatusType
- flags;
- flags=ParseGeometry(clone_info->density,&geometry_info);
- resolution.x=geometry_info.rho;
- resolution.y=geometry_info.sigma;
- if ((flags & SigmaValue) == MagickFalse)
- resolution.y=resolution.x;
- }
- mid=(resolution.x/96.0)*ExpandAffine(&clone_info->affine)*
- SaneStrokeWidth(image,clone_info)/2.0;
- bounds.x1=0.0;
- bounds.y1=0.0;
- bounds.x2=0.0;
- bounds.y2=0.0;
- if (polygon_info != (PolygonInfo *) NULL)
- {
- bounds=polygon_info->edges[0].bounds;
- for (i=1; i < (ssize_t) polygon_info->number_edges; i++)
- {
- if (polygon_info->edges[i].bounds.x1 < (double) bounds.x1)
- bounds.x1=polygon_info->edges[i].bounds.x1;
- if (polygon_info->edges[i].bounds.y1 < (double) bounds.y1)
- bounds.y1=polygon_info->edges[i].bounds.y1;
- if (polygon_info->edges[i].bounds.x2 > (double) bounds.x2)
- bounds.x2=polygon_info->edges[i].bounds.x2;
- if (polygon_info->edges[i].bounds.y2 > (double) bounds.y2)
- bounds.y2=polygon_info->edges[i].bounds.y2;
- }
- bounds.x1-=mid;
- bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double)
- image->columns ? (double) image->columns-1 : bounds.x1;
- bounds.y1-=mid;
- bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double)
- image->rows ? (double) image->rows-1 : bounds.y1;
- bounds.x2+=mid;
- bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double)
- image->columns ? (double) image->columns-1 : bounds.x2;
- bounds.y2+=mid;
- bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double)
- image->rows ? (double) image->rows-1 : bounds.y2;
- for (i=0; i < (ssize_t) polygon_info->number_edges; i++)
- {
- if (polygon_info->edges[i].direction != 0)
- status=QueryColorCompliance("#f00",AllCompliance,&clone_info->stroke,
- exception);
- else
- status=QueryColorCompliance("#0f0",AllCompliance,&clone_info->stroke,
- exception);
- if (status == MagickFalse)
- break;
- start.x=(double) (polygon_info->edges[i].bounds.x1-mid);
- start.y=(double) (polygon_info->edges[i].bounds.y1-mid);
- end.x=(double) (polygon_info->edges[i].bounds.x2+mid);
- end.y=(double) (polygon_info->edges[i].bounds.y2+mid);
- primitive_info[0].primitive=RectanglePrimitive;
- status&=TraceRectangle(primitive_info,start,end);
- primitive_info[0].method=ReplaceMethod;
- coordinates=(ssize_t) primitive_info[0].coordinates;
- primitive_info[coordinates].primitive=UndefinedPrimitive;
- status=DrawPrimitive(image,clone_info,primitive_info,exception);
- if (status == MagickFalse)
- break;
- }
- if (i < (ssize_t) polygon_info->number_edges)
- {
- clone_info=DestroyDrawInfo(clone_info);
- return(status == 0 ? MagickFalse : MagickTrue);
- }
- }
- status=QueryColorCompliance("#00f",AllCompliance,&clone_info->stroke,
- exception);
- if (status == MagickFalse)
- {
- clone_info=DestroyDrawInfo(clone_info);
- return(MagickFalse);
- }
- start.x=(double) (bounds.x1-mid);
- start.y=(double) (bounds.y1-mid);
- end.x=(double) (bounds.x2+mid);
- end.y=(double) (bounds.y2+mid);
- primitive_info[0].primitive=RectanglePrimitive;
- status&=TraceRectangle(primitive_info,start,end);
- primitive_info[0].method=ReplaceMethod;
- coordinates=(ssize_t) primitive_info[0].coordinates;
- primitive_info[coordinates].primitive=UndefinedPrimitive;
- status=DrawPrimitive(image,clone_info,primitive_info,exception);
- clone_info=DestroyDrawInfo(clone_info);
- return(status == 0 ? MagickFalse : MagickTrue);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w C l i p P a t h %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawClipPath() draws the clip path on the image mask.
- %
- % The format of the DrawClipPath method is:
- %
- % MagickBooleanType DrawClipPath(Image *image,const DrawInfo *draw_info,
- % const char *id,ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o id: the clip path id.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- MagickExport MagickBooleanType DrawClipPath(Image *image,
- const DrawInfo *draw_info,const char *id,ExceptionInfo *exception)
- {
- const char
- *clip_path;
- Image
- *clipping_mask;
- MagickBooleanType
- status;
- clip_path=GetImageArtifact(image,id);
- if (clip_path == (const char *) NULL)
- return(MagickFalse);
- clipping_mask=DrawClippingMask(image,draw_info,draw_info->clip_mask,clip_path,
- exception);
- if (clipping_mask == (Image *) NULL)
- return(MagickFalse);
- status=SetImageMask(image,WritePixelMask,clipping_mask,exception);
- clipping_mask=DestroyImage(clipping_mask);
- return(status);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w C l i p p i n g M a s k %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawClippingMask() draws the clip path and returns it as an image clipping
- % mask.
- %
- % The format of the DrawClippingMask method is:
- %
- % Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
- % const char *id,const char *clip_path,ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o id: the clip path id.
- %
- % o clip_path: the clip path.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static Image *DrawClippingMask(Image *image,const DrawInfo *draw_info,
- const char *id,const char *clip_path,ExceptionInfo *exception)
- {
- DrawInfo
- *clone_info;
- Image
- *clip_mask,
- *separate_mask;
- MagickStatusType
- status;
- /*
- Draw a clip path.
- */
- assert(image != (Image *) NULL);
- assert(image->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
- assert(draw_info != (const DrawInfo *) NULL);
- clip_mask=AcquireImage((const ImageInfo *) NULL,exception);
- status=SetImageExtent(clip_mask,image->columns,image->rows,exception);
- if (status == MagickFalse)
- return(DestroyImage(clip_mask));
- status=SetImageMask(clip_mask,WritePixelMask,(Image *) NULL,exception);
- status=QueryColorCompliance("#0000",AllCompliance,
- &clip_mask->background_color,exception);
- clip_mask->background_color.alpha=(MagickRealType) TransparentAlpha;
- clip_mask->background_color.alpha_trait=BlendPixelTrait;
- status=SetImageBackgroundColor(clip_mask,exception);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin clip-path %s",
- id);
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- (void) CloneString(&clone_info->primitive,clip_path);
- status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
- exception);
- if (clone_info->clip_mask != (char *) NULL)
- clone_info->clip_mask=DestroyString(clone_info->clip_mask);
- status=QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
- exception);
- clone_info->stroke_width=0.0;
- clone_info->alpha=OpaqueAlpha;
- clone_info->clip_path=MagickTrue;
- status=RenderMVGContent(clip_mask,clone_info,0,exception);
- clone_info=DestroyDrawInfo(clone_info);
- separate_mask=SeparateImage(clip_mask,AlphaChannel,exception);
- if (separate_mask != (Image *) NULL)
- {
- clip_mask=DestroyImage(clip_mask);
- clip_mask=separate_mask;
- status=NegateImage(clip_mask,MagickFalse,exception);
- if (status == MagickFalse)
- clip_mask=DestroyImage(clip_mask);
- }
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end clip-path");
- return(clip_mask);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w C o m p o s i t e M a s k %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawCompositeMask() draws the mask path and returns it as an image mask.
- %
- % The format of the DrawCompositeMask method is:
- %
- % Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
- % const char *id,const char *mask_path,ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o id: the mask path id.
- %
- % o mask_path: the mask path.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static Image *DrawCompositeMask(Image *image,const DrawInfo *draw_info,
- const char *id,const char *mask_path,ExceptionInfo *exception)
- {
- Image
- *composite_mask,
- *separate_mask;
- DrawInfo
- *clone_info;
- MagickStatusType
- status;
- /*
- Draw a mask path.
- */
- assert(image != (Image *) NULL);
- assert(image->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
- assert(draw_info != (const DrawInfo *) NULL);
- composite_mask=AcquireImage((const ImageInfo *) NULL,exception);
- status=SetImageExtent(composite_mask,image->columns,image->rows,exception);
- if (status == MagickFalse)
- return(DestroyImage(composite_mask));
- status=SetImageMask(composite_mask,CompositePixelMask,(Image *) NULL,
- exception);
- status=QueryColorCompliance("#0000",AllCompliance,
- &composite_mask->background_color,exception);
- composite_mask->background_color.alpha=(MagickRealType) TransparentAlpha;
- composite_mask->background_color.alpha_trait=BlendPixelTrait;
- (void) SetImageBackgroundColor(composite_mask,exception);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),"\nbegin mask-path %s",
- id);
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- (void) CloneString(&clone_info->primitive,mask_path);
- status=QueryColorCompliance("#ffffff",AllCompliance,&clone_info->fill,
- exception);
- status=QueryColorCompliance("#00000000",AllCompliance,&clone_info->stroke,
- exception);
- clone_info->stroke_width=0.0;
- clone_info->alpha=OpaqueAlpha;
- status=RenderMVGContent(composite_mask,clone_info,0,exception);
- clone_info=DestroyDrawInfo(clone_info);
- separate_mask=SeparateImage(composite_mask,AlphaChannel,exception);
- if (separate_mask != (Image *) NULL)
- {
- composite_mask=DestroyImage(composite_mask);
- composite_mask=separate_mask;
- status=NegateImage(composite_mask,MagickFalse,exception);
- if (status == MagickFalse)
- composite_mask=DestroyImage(composite_mask);
- }
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end mask-path");
- return(composite_mask);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + D r a w D a s h P o l y g o n %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawDashPolygon() draws a dashed polygon (line, rectangle, ellipse) on the
- % image while respecting the dash offset and dash pattern attributes.
- %
- % The format of the DrawDashPolygon method is:
- %
- % MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
- % const PrimitiveInfo *primitive_info,Image *image,
- % ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o draw_info: the draw info.
- %
- % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
- %
- % o image: the image.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static MagickBooleanType DrawDashPolygon(const DrawInfo *draw_info,
- const PrimitiveInfo *primitive_info,Image *image,ExceptionInfo *exception)
- {
- double
- length,
- maximum_length,
- offset,
- scale,
- total_length;
- DrawInfo
- *clone_info;
- MagickStatusType
- status;
- PrimitiveInfo
- *dash_polygon;
- register double
- dx,
- dy;
- register ssize_t
- i;
- size_t
- number_vertices;
- ssize_t
- j,
- n;
- assert(draw_info != (const DrawInfo *) NULL);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-dash");
- for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++) ;
- number_vertices=(size_t) i;
- dash_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
- (2UL*number_vertices+32UL),sizeof(*dash_polygon));
- if (dash_polygon == (PrimitiveInfo *) NULL)
- return(MagickFalse);
- (void) memset(dash_polygon,0,(2UL*number_vertices+32UL)*
- sizeof(*dash_polygon));
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- clone_info->miterlimit=0;
- dash_polygon[0]=primitive_info[0];
- scale=ExpandAffine(&draw_info->affine);
- length=scale*draw_info->dash_pattern[0];
- offset=fabs(draw_info->dash_offset) >= MagickEpsilon ?
- scale*draw_info->dash_offset : 0.0;
- j=1;
- for (n=0; offset > 0.0; j=0)
- {
- if (draw_info->dash_pattern[n] <= 0.0)
- break;
- length=scale*(draw_info->dash_pattern[n]+(n == 0 ? -0.5 : 0.5));
- if (offset > length)
- {
- offset-=length;
- n++;
- length=scale*draw_info->dash_pattern[n];
- continue;
- }
- if (offset < length)
- {
- length-=offset;
- offset=0.0;
- break;
- }
- offset=0.0;
- n++;
- }
- status=MagickTrue;
- maximum_length=0.0;
- total_length=0.0;
- for (i=1; (i < (ssize_t) number_vertices) && (length >= 0.0); i++)
- {
- dx=primitive_info[i].point.x-primitive_info[i-1].point.x;
- dy=primitive_info[i].point.y-primitive_info[i-1].point.y;
- maximum_length=hypot(dx,dy);
- if (maximum_length > MaxBezierCoordinates)
- break;
- if (fabs(length) < MagickEpsilon)
- {
- if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
- n++;
- if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
- n=0;
- length=scale*draw_info->dash_pattern[n];
- }
- for (total_length=0.0; (length >= 0.0) && (maximum_length >= (total_length+length)); )
- {
- total_length+=length;
- if ((n & 0x01) != 0)
- {
- dash_polygon[0]=primitive_info[0];
- dash_polygon[0].point.x=(double) (primitive_info[i-1].point.x+dx*
- total_length*PerceptibleReciprocal(maximum_length));
- dash_polygon[0].point.y=(double) (primitive_info[i-1].point.y+dy*
- total_length*PerceptibleReciprocal(maximum_length));
- j=1;
- }
- else
- {
- if ((j+1) > (ssize_t) number_vertices)
- break;
- dash_polygon[j]=primitive_info[i-1];
- dash_polygon[j].point.x=(double) (primitive_info[i-1].point.x+dx*
- total_length*PerceptibleReciprocal(maximum_length));
- dash_polygon[j].point.y=(double) (primitive_info[i-1].point.y+dy*
- total_length*PerceptibleReciprocal(maximum_length));
- dash_polygon[j].coordinates=1;
- j++;
- dash_polygon[0].coordinates=(size_t) j;
- dash_polygon[j].primitive=UndefinedPrimitive;
- status&=DrawStrokePolygon(image,clone_info,dash_polygon,exception);
- }
- if (fabs(draw_info->dash_pattern[n]) >= MagickEpsilon)
- n++;
- if (fabs(draw_info->dash_pattern[n]) < MagickEpsilon)
- n=0;
- length=scale*draw_info->dash_pattern[n];
- }
- length-=(maximum_length-total_length);
- if ((n & 0x01) != 0)
- continue;
- dash_polygon[j]=primitive_info[i];
- dash_polygon[j].coordinates=1;
- j++;
- }
- if ((total_length < maximum_length) && ((n & 0x01) == 0) && (j > 1))
- {
- dash_polygon[j]=primitive_info[i-1];
- dash_polygon[j].point.x+=MagickEpsilon;
- dash_polygon[j].point.y+=MagickEpsilon;
- dash_polygon[j].coordinates=1;
- j++;
- dash_polygon[0].coordinates=(size_t) j;
- dash_polygon[j].primitive=UndefinedPrimitive;
- status&=DrawStrokePolygon(image,clone_info,dash_polygon,exception);
- }
- dash_polygon=(PrimitiveInfo *) RelinquishMagickMemory(dash_polygon);
- clone_info=DestroyDrawInfo(clone_info);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-dash");
- return(status != 0 ? MagickTrue : MagickFalse);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w G r a d i e n t I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawGradientImage() draws a linear gradient on the image.
- %
- % The format of the DrawGradientImage method is:
- %
- % MagickBooleanType DrawGradientImage(Image *image,
- % const DrawInfo *draw_info,ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static inline double GetStopColorOffset(const GradientInfo *gradient,
- const ssize_t x,const ssize_t y)
- {
- switch (gradient->type)
- {
- case UndefinedGradient:
- case LinearGradient:
- {
- double
- gamma,
- length,
- offset,
- scale;
- PointInfo
- p,
- q;
- const SegmentInfo
- *gradient_vector;
- gradient_vector=(&gradient->gradient_vector);
- p.x=gradient_vector->x2-gradient_vector->x1;
- p.y=gradient_vector->y2-gradient_vector->y1;
- q.x=(double) x-gradient_vector->x1;
- q.y=(double) y-gradient_vector->y1;
- length=sqrt(q.x*q.x+q.y*q.y);
- gamma=sqrt(p.x*p.x+p.y*p.y)*length;
- gamma=PerceptibleReciprocal(gamma);
- scale=p.x*q.x+p.y*q.y;
- offset=gamma*scale*length;
- return(offset);
- }
- case RadialGradient:
- {
- PointInfo
- v;
- if (gradient->spread == RepeatSpread)
- {
- v.x=(double) x-gradient->center.x;
- v.y=(double) y-gradient->center.y;
- return(sqrt(v.x*v.x+v.y*v.y));
- }
- v.x=(double) (((x-gradient->center.x)*cos(DegreesToRadians(
- gradient->angle)))+((y-gradient->center.y)*sin(DegreesToRadians(
- gradient->angle))))*PerceptibleReciprocal(gradient->radii.x);
- v.y=(double) (((x-gradient->center.x)*sin(DegreesToRadians(
- gradient->angle)))-((y-gradient->center.y)*cos(DegreesToRadians(
- gradient->angle))))*PerceptibleReciprocal(gradient->radii.y);
- return(sqrt(v.x*v.x+v.y*v.y));
- }
- }
- return(0.0);
- }
- static int StopInfoCompare(const void *x,const void *y)
- {
- StopInfo
- *stop_1,
- *stop_2;
- stop_1=(StopInfo *) x;
- stop_2=(StopInfo *) y;
- if (stop_1->offset > stop_2->offset)
- return(1);
- if (fabs(stop_1->offset-stop_2->offset) <= MagickEpsilon)
- return(0);
- return(-1);
- }
- MagickExport MagickBooleanType DrawGradientImage(Image *image,
- const DrawInfo *draw_info,ExceptionInfo *exception)
- {
- CacheView
- *image_view;
- const GradientInfo
- *gradient;
- const SegmentInfo
- *gradient_vector;
- double
- length;
- MagickBooleanType
- status;
- PixelInfo
- zero;
- PointInfo
- point;
- RectangleInfo
- bounding_box;
- ssize_t
- y;
- /*
- Draw linear or radial gradient on image.
- */
- assert(image != (Image *) NULL);
- assert(image->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
- assert(draw_info != (const DrawInfo *) NULL);
- gradient=(&draw_info->gradient);
- qsort(gradient->stops,gradient->number_stops,sizeof(StopInfo),
- StopInfoCompare);
- gradient_vector=(&gradient->gradient_vector);
- point.x=gradient_vector->x2-gradient_vector->x1;
- point.y=gradient_vector->y2-gradient_vector->y1;
- length=sqrt(point.x*point.x+point.y*point.y);
- bounding_box=gradient->bounding_box;
- status=MagickTrue;
- GetPixelInfo(image,&zero);
- image_view=AcquireAuthenticCacheView(image,exception);
- #if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static) shared(status) \
- magick_number_threads(image,image,bounding_box.height-bounding_box.y,1)
- #endif
- for (y=bounding_box.y; y < (ssize_t) bounding_box.height; y++)
- {
- PixelInfo
- composite,
- pixel;
- double
- alpha,
- offset;
- register Quantum
- *magick_restrict q;
- register ssize_t
- i,
- x;
- ssize_t
- j;
- if (status == MagickFalse)
- continue;
- q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
- if (q == (Quantum *) NULL)
- {
- status=MagickFalse;
- continue;
- }
- pixel=zero;
- composite=zero;
- offset=GetStopColorOffset(gradient,0,y);
- if (gradient->type != RadialGradient)
- offset*=PerceptibleReciprocal(length);
- for (x=bounding_box.x; x < (ssize_t) bounding_box.width; x++)
- {
- GetPixelInfoPixel(image,q,&pixel);
- switch (gradient->spread)
- {
- case UndefinedSpread:
- case PadSpread:
- {
- if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
- (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
- {
- offset=GetStopColorOffset(gradient,x,y);
- if (gradient->type != RadialGradient)
- offset*=PerceptibleReciprocal(length);
- }
- for (i=0; i < (ssize_t) gradient->number_stops; i++)
- if (offset < gradient->stops[i].offset)
- break;
- if ((offset < 0.0) || (i == 0))
- composite=gradient->stops[0].color;
- else
- if ((offset > 1.0) || (i == (ssize_t) gradient->number_stops))
- composite=gradient->stops[gradient->number_stops-1].color;
- else
- {
- j=i;
- i--;
- alpha=(offset-gradient->stops[i].offset)/
- (gradient->stops[j].offset-gradient->stops[i].offset);
- CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
- &gradient->stops[j].color,alpha,&composite);
- }
- break;
- }
- case ReflectSpread:
- {
- if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
- (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
- {
- offset=GetStopColorOffset(gradient,x,y);
- if (gradient->type != RadialGradient)
- offset*=PerceptibleReciprocal(length);
- }
- if (offset < 0.0)
- offset=(-offset);
- if ((ssize_t) fmod(offset,2.0) == 0)
- offset=fmod(offset,1.0);
- else
- offset=1.0-fmod(offset,1.0);
- for (i=0; i < (ssize_t) gradient->number_stops; i++)
- if (offset < gradient->stops[i].offset)
- break;
- if (i == 0)
- composite=gradient->stops[0].color;
- else
- if (i == (ssize_t) gradient->number_stops)
- composite=gradient->stops[gradient->number_stops-1].color;
- else
- {
- j=i;
- i--;
- alpha=(offset-gradient->stops[i].offset)/
- (gradient->stops[j].offset-gradient->stops[i].offset);
- CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
- &gradient->stops[j].color,alpha,&composite);
- }
- break;
- }
- case RepeatSpread:
- {
- MagickBooleanType
- antialias;
- double
- repeat;
- antialias=MagickFalse;
- repeat=0.0;
- if ((x != (ssize_t) ceil(gradient_vector->x1-0.5)) ||
- (y != (ssize_t) ceil(gradient_vector->y1-0.5)))
- {
- offset=GetStopColorOffset(gradient,x,y);
- if (gradient->type == LinearGradient)
- {
- repeat=fmod(offset,length);
- if (repeat < 0.0)
- repeat=length-fmod(-repeat,length);
- else
- repeat=fmod(offset,length);
- antialias=(repeat < length) && ((repeat+1.0) > length) ?
- MagickTrue : MagickFalse;
- offset=PerceptibleReciprocal(length)*repeat;
- }
- else
- {
- repeat=fmod(offset,gradient->radius);
- if (repeat < 0.0)
- repeat=gradient->radius-fmod(-repeat,gradient->radius);
- else
- repeat=fmod(offset,gradient->radius);
- antialias=repeat+1.0 > gradient->radius ? MagickTrue :
- MagickFalse;
- offset=repeat/gradient->radius;
- }
- }
- for (i=0; i < (ssize_t) gradient->number_stops; i++)
- if (offset < gradient->stops[i].offset)
- break;
- if (i == 0)
- composite=gradient->stops[0].color;
- else
- if (i == (ssize_t) gradient->number_stops)
- composite=gradient->stops[gradient->number_stops-1].color;
- else
- {
- j=i;
- i--;
- alpha=(offset-gradient->stops[i].offset)/
- (gradient->stops[j].offset-gradient->stops[i].offset);
- if (antialias != MagickFalse)
- {
- if (gradient->type == LinearGradient)
- alpha=length-repeat;
- else
- alpha=gradient->radius-repeat;
- i=0;
- j=(ssize_t) gradient->number_stops-1L;
- }
- CompositePixelInfoBlend(&gradient->stops[i].color,1.0-alpha,
- &gradient->stops[j].color,alpha,&composite);
- }
- break;
- }
- }
- CompositePixelInfoOver(&composite,composite.alpha,&pixel,pixel.alpha,
- &pixel);
- SetPixelViaPixelInfo(image,&pixel,q);
- q+=GetPixelChannels(image);
- }
- if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
- status=MagickFalse;
- }
- image_view=DestroyCacheView(image_view);
- return(status);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w I m a g e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawImage() draws a graphic primitive on your image. The primitive
- % may be represented as a string or filename. Precede the filename with an
- % "at" sign (@) and the contents of the file are drawn on the image. You
- % can affect how text is drawn by setting one or more members of the draw
- % info structure.
- %
- % The format of the DrawImage method is:
- %
- % MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info,
- % ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static MagickBooleanType CheckPrimitiveExtent(MVGInfo *mvg_info,
- const size_t pad)
- {
- double
- extent;
- size_t
- quantum;
- /*
- Check if there is enough storage for drawing pimitives.
- */
- extent=(double) mvg_info->offset+pad+PrimitiveExtentPad;
- quantum=sizeof(**mvg_info->primitive_info);
- if (((extent*quantum) < (double) SSIZE_MAX) &&
- ((extent*quantum) < (double) GetMaxMemoryRequest()))
- {
- if (extent <= (double) *mvg_info->extent)
- return(MagickTrue);
- *mvg_info->primitive_info=(PrimitiveInfo *) ResizeQuantumMemory(
- *mvg_info->primitive_info,(size_t) extent,quantum);
- if (*mvg_info->primitive_info != (PrimitiveInfo *) NULL)
- {
- register ssize_t
- i;
- *mvg_info->extent=(size_t) extent;
- for (i=mvg_info->offset+1; i < (ssize_t) extent; i++)
- (*mvg_info->primitive_info)[i].primitive=UndefinedPrimitive;
- return(MagickTrue);
- }
- }
- /*
- Reallocation failed, allocate a primitive to facilitate unwinding.
- */
- (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
- ResourceLimitError,"MemoryAllocationFailed","`%s'","");
- if (*mvg_info->primitive_info != (PrimitiveInfo *) NULL)
- *mvg_info->primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(
- *mvg_info->primitive_info);
- *mvg_info->primitive_info=(PrimitiveInfo *) AcquireCriticalMemory(
- PrimitiveExtentPad*quantum);
- (void) memset(*mvg_info->primitive_info,0,PrimitiveExtentPad*quantum);
- *mvg_info->extent=1;
- return(MagickFalse);
- }
- MagickExport int MVGMacroCompare(const void *target,const void *source)
- {
- const char
- *p,
- *q;
- p=(const char *) target;
- q=(const char *) source;
- return(strcmp(p,q));
- }
- static SplayTreeInfo *GetMVGMacros(const char *primitive)
- {
- char
- *macro,
- *token;
- const char
- *q;
- size_t
- extent;
- SplayTreeInfo
- *macros;
- /*
- Scan graphic primitives for definitions and classes.
- */
- if (primitive == (const char *) NULL)
- return((SplayTreeInfo *) NULL);
- macros=NewSplayTree(MVGMacroCompare,RelinquishMagickMemory,
- RelinquishMagickMemory);
- macro=AcquireString(primitive);
- token=AcquireString(primitive);
- extent=strlen(token)+MagickPathExtent;
- for (q=primitive; *q != '\0'; )
- {
- GetNextToken(q,&q,extent,token);
- if (*token == '\0')
- break;
- if (LocaleCompare("push",token) == 0)
- {
- register const char
- *end,
- *start;
- GetNextToken(q,&q,extent,token);
- if (*q == '"')
- {
- char
- name[MagickPathExtent];
- const char
- *p;
- ssize_t
- n;
- /*
- Named macro (e.g. push graphic-context "wheel").
- */
- GetNextToken(q,&q,extent,token);
- start=q;
- end=q;
- (void) CopyMagickString(name,token,MagickPathExtent);
- n=1;
- for (p=q; *p != '\0'; )
- {
- GetNextToken(p,&p,extent,token);
- if (*token == '\0')
- break;
- if (LocaleCompare(token,"pop") == 0)
- {
- end=p-strlen(token)-1;
- n--;
- }
- if (LocaleCompare(token,"push") == 0)
- n++;
- if ((n == 0) && (end > start))
- {
- /*
- Extract macro.
- */
- GetNextToken(p,&p,extent,token);
- (void) CopyMagickString(macro,start,(size_t) (end-start));
- (void) AddValueToSplayTree(macros,ConstantString(name),
- ConstantString(macro));
- break;
- }
- }
- }
- }
- }
- token=DestroyString(token);
- macro=DestroyString(macro);
- return(macros);
- }
- static inline MagickBooleanType IsPoint(const char *point)
- {
- char
- *p;
- double
- value;
- value=StringToDouble(point,&p);
- return((fabs(value) < MagickEpsilon) && (p == point) ? MagickFalse :
- MagickTrue);
- }
- static inline MagickBooleanType TracePoint(PrimitiveInfo *primitive_info,
- const PointInfo point)
- {
- primitive_info->coordinates=1;
- primitive_info->closed_subpath=MagickFalse;
- primitive_info->point=point;
- return(MagickTrue);
- }
- static MagickBooleanType RenderMVGContent(Image *image,
- const DrawInfo *draw_info,const size_t depth,ExceptionInfo *exception)
- {
- #define RenderImageTag "Render/Image"
- AffineMatrix
- affine,
- current;
- char
- keyword[MagickPathExtent],
- geometry[MagickPathExtent],
- *next_token,
- pattern[MagickPathExtent],
- *primitive,
- *token;
- const char
- *q;
- double
- angle,
- coordinates,
- cursor,
- factor,
- primitive_extent;
- DrawInfo
- *clone_info,
- **graphic_context;
- MagickBooleanType
- proceed;
- MagickStatusType
- status;
- MVGInfo
- mvg_info;
- PointInfo
- point;
- PrimitiveInfo
- *primitive_info;
- PrimitiveType
- primitive_type;
- register const char
- *p;
- register ssize_t
- i,
- x;
- SegmentInfo
- bounds;
- size_t
- extent,
- number_points,
- number_stops;
- SplayTreeInfo
- *macros;
- ssize_t
- defsDepth,
- j,
- k,
- n,
- symbolDepth;
- StopInfo
- *stops;
- TypeMetric
- metrics;
- assert(image != (Image *) NULL);
- assert(image->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
- assert(draw_info != (DrawInfo *) NULL);
- assert(draw_info->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
- if (depth > MagickMaxRecursionDepth)
- ThrowBinaryException(DrawError,"VectorGraphicsNestedTooDeeply",
- image->filename);
- if ((draw_info->primitive == (char *) NULL) ||
- (*draw_info->primitive == '\0'))
- return(MagickFalse);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),"begin draw-image");
- if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
- return(MagickFalse);
- if (image->alpha_trait == UndefinedPixelTrait)
- {
- status=SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
- if (status == MagickFalse)
- return(MagickFalse);
- }
- primitive=(char *) NULL;
- if (*draw_info->primitive != '@')
- primitive=AcquireString(draw_info->primitive);
- else
- if ((strlen(draw_info->primitive) > 1) &&
- (*(draw_info->primitive+1) != '-'))
- primitive=FileToString(draw_info->primitive+1,~0UL,exception);
- if (primitive == (char *) NULL)
- return(MagickFalse);
- primitive_extent=(double) strlen(primitive);
- (void) SetImageArtifact(image,"mvg:vector-graphics",primitive);
- n=0;
- number_stops=0;
- stops=(StopInfo *) NULL;
- /*
- Allocate primitive info memory.
- */
- graphic_context=(DrawInfo **) AcquireMagickMemory(sizeof(*graphic_context));
- if (graphic_context == (DrawInfo **) NULL)
- {
- primitive=DestroyString(primitive);
- ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
- image->filename);
- }
- number_points=PrimitiveExtentPad;
- primitive_info=(PrimitiveInfo *) AcquireQuantumMemory((size_t) number_points,
- sizeof(*primitive_info));
- if (primitive_info == (PrimitiveInfo *) NULL)
- {
- primitive=DestroyString(primitive);
- for ( ; n >= 0; n--)
- graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
- graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
- ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
- image->filename);
- }
- (void) memset(primitive_info,0,(size_t) number_points*
- sizeof(*primitive_info));
- (void) memset(&mvg_info,0,sizeof(mvg_info));
- mvg_info.primitive_info=(&primitive_info);
- mvg_info.extent=(&number_points);
- mvg_info.exception=exception;
- graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- graphic_context[n]->viewbox=image->page;
- if ((image->page.width == 0) || (image->page.height == 0))
- {
- graphic_context[n]->viewbox.width=image->columns;
- graphic_context[n]->viewbox.height=image->rows;
- }
- token=AcquireString(primitive);
- extent=strlen(token)+MagickPathExtent;
- defsDepth=0;
- symbolDepth=0;
- cursor=0.0;
- macros=GetMVGMacros(primitive);
- status=MagickTrue;
- for (q=primitive; *q != '\0'; )
- {
- /*
- Interpret graphic primitive.
- */
- GetNextToken(q,&q,MagickPathExtent,keyword);
- if (*keyword == '\0')
- break;
- if (*keyword == '#')
- {
- /*
- Comment.
- */
- while ((*q != '\n') && (*q != '\0'))
- q++;
- continue;
- }
- p=q-strlen(keyword)-1;
- primitive_type=UndefinedPrimitive;
- current=graphic_context[n]->affine;
- GetAffineMatrix(&affine);
- switch (*keyword)
- {
- case ';':
- break;
- case 'a':
- case 'A':
- {
- if (LocaleCompare("affine",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- affine.sx=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- affine.rx=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- affine.ry=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- affine.sy=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- affine.tx=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- affine.ty=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- if (LocaleCompare("alpha",keyword) == 0)
- {
- primitive_type=AlphaPrimitive;
- break;
- }
- if (LocaleCompare("arc",keyword) == 0)
- {
- primitive_type=ArcPrimitive;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'b':
- case 'B':
- {
- if (LocaleCompare("bezier",keyword) == 0)
- {
- primitive_type=BezierPrimitive;
- break;
- }
- if (LocaleCompare("border-color",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- status&=QueryColorCompliance(token,AllCompliance,
- &graphic_context[n]->border_color,exception);
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'c':
- case 'C':
- {
- if (LocaleCompare("class",keyword) == 0)
- {
- const char
- *mvg_class;
- GetNextToken(q,&q,extent,token);
- if (*token == '\0')
- {
- status=MagickFalse;
- break;
- }
- mvg_class=(const char *) GetValueFromSplayTree(macros,token);
- if (mvg_class != (const char *) NULL)
- {
- char
- *elements;
- ssize_t
- offset;
- /*
- Inject class elements in stream.
- */
- offset=(ssize_t) (p-primitive);
- elements=AcquireString(primitive);
- elements[offset]='\0';
- (void) ConcatenateString(&elements,mvg_class);
- (void) ConcatenateString(&elements,"\n");
- (void) ConcatenateString(&elements,q);
- primitive=DestroyString(primitive);
- primitive=elements;
- q=primitive+offset;
- }
- break;
- }
- if (LocaleCompare("clip-path",keyword) == 0)
- {
- const char
- *clip_path;
- /*
- Take a node from within the MVG document, and duplicate it here.
- */
- GetNextToken(q,&q,extent,token);
- if (*token == '\0')
- {
- status=MagickFalse;
- break;
- }
- (void) CloneString(&graphic_context[n]->clip_mask,token);
- clip_path=(const char *) GetValueFromSplayTree(macros,token);
- if (clip_path != (const char *) NULL)
- {
- if (graphic_context[n]->clipping_mask != (Image *) NULL)
- graphic_context[n]->clipping_mask=
- DestroyImage(graphic_context[n]->clipping_mask);
- graphic_context[n]->clipping_mask=DrawClippingMask(image,
- graphic_context[n],token,clip_path,exception);
- if (draw_info->compliance != SVGCompliance)
- {
- const char
- *clip_path;
- clip_path=(const char *) GetValueFromSplayTree(macros,
- graphic_context[n]->clip_mask);
- if (clip_path != (const char *) NULL)
- (void) SetImageArtifact(image,
- graphic_context[n]->clip_mask,clip_path);
- status&=DrawClipPath(image,graphic_context[n],
- graphic_context[n]->clip_mask,exception);
- }
- }
- break;
- }
- if (LocaleCompare("clip-rule",keyword) == 0)
- {
- ssize_t
- fill_rule;
- GetNextToken(q,&q,extent,token);
- fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
- token);
- if (fill_rule == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->fill_rule=(FillRule) fill_rule;
- break;
- }
- if (LocaleCompare("clip-units",keyword) == 0)
- {
- ssize_t
- clip_units;
- GetNextToken(q,&q,extent,token);
- clip_units=ParseCommandOption(MagickClipPathOptions,MagickFalse,
- token);
- if (clip_units == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->clip_units=(ClipPathUnits) clip_units;
- if (clip_units == ObjectBoundingBox)
- {
- GetAffineMatrix(¤t);
- affine.sx=draw_info->bounds.x2;
- affine.sy=draw_info->bounds.y2;
- affine.tx=draw_info->bounds.x1;
- affine.ty=draw_info->bounds.y1;
- break;
- }
- break;
- }
- if (LocaleCompare("circle",keyword) == 0)
- {
- primitive_type=CirclePrimitive;
- break;
- }
- if (LocaleCompare("color",keyword) == 0)
- {
- primitive_type=ColorPrimitive;
- break;
- }
- if (LocaleCompare("compliance",keyword) == 0)
- {
- /*
- MVG compliance associates a clipping mask with an image; SVG
- compliance associates a clipping mask with a graphics context.
- */
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->compliance=(ComplianceType) ParseCommandOption(
- MagickComplianceOptions,MagickFalse,token);
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'd':
- case 'D':
- {
- if (LocaleCompare("decorate",keyword) == 0)
- {
- ssize_t
- decorate;
- GetNextToken(q,&q,extent,token);
- decorate=ParseCommandOption(MagickDecorateOptions,MagickFalse,
- token);
- if (decorate == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->decorate=(DecorationType) decorate;
- break;
- }
- if (LocaleCompare("density",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- (void) CloneString(&graphic_context[n]->density,token);
- break;
- }
- if (LocaleCompare("direction",keyword) == 0)
- {
- ssize_t
- direction;
- GetNextToken(q,&q,extent,token);
- direction=ParseCommandOption(MagickDirectionOptions,MagickFalse,
- token);
- if (direction == -1)
- status=MagickFalse;
- else
- graphic_context[n]->direction=(DirectionType) direction;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'e':
- case 'E':
- {
- if (LocaleCompare("ellipse",keyword) == 0)
- {
- primitive_type=EllipsePrimitive;
- break;
- }
- if (LocaleCompare("encoding",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- (void) CloneString(&graphic_context[n]->encoding,token);
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'f':
- case 'F':
- {
- if (LocaleCompare("fill",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- if (graphic_context[n]->clip_path != MagickFalse)
- break;
- (void) FormatLocaleString(pattern,MagickPathExtent,"%s",token);
- if (GetImageArtifact(image,pattern) != (const char *) NULL)
- (void) DrawPatternPath(image,draw_info,token,
- &graphic_context[n]->fill_pattern,exception);
- else
- {
- status&=QueryColorCompliance(token,AllCompliance,
- &graphic_context[n]->fill,exception);
- if (graphic_context[n]->fill_alpha != OpaqueAlpha)
- graphic_context[n]->fill.alpha=graphic_context[n]->fill_alpha;
- }
- break;
- }
- if (LocaleCompare("fill-opacity",keyword) == 0)
- {
- double
- opacity;
- GetNextToken(q,&q,extent,token);
- if (graphic_context[n]->clip_path != MagickFalse)
- break;
- factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
- opacity=MagickMin(MagickMax(factor*
- StringToDouble(token,&next_token),0.0),1.0);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- graphic_context[n]->fill_alpha*=opacity;
- if (graphic_context[n]->fill.alpha != TransparentAlpha)
- graphic_context[n]->fill.alpha=graphic_context[n]->fill_alpha;
- else
- graphic_context[n]->fill.alpha=(MagickRealType)
- ClampToQuantum(QuantumRange*(1.0-opacity));
- break;
- }
- if (LocaleCompare("fill-rule",keyword) == 0)
- {
- ssize_t
- fill_rule;
- GetNextToken(q,&q,extent,token);
- fill_rule=ParseCommandOption(MagickFillRuleOptions,MagickFalse,
- token);
- if (fill_rule == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->fill_rule=(FillRule) fill_rule;
- break;
- }
- if (LocaleCompare("font",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- (void) CloneString(&graphic_context[n]->font,token);
- if (LocaleCompare("none",token) == 0)
- graphic_context[n]->font=(char *) RelinquishMagickMemory(
- graphic_context[n]->font);
- break;
- }
- if (LocaleCompare("font-family",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- (void) CloneString(&graphic_context[n]->family,token);
- break;
- }
- if (LocaleCompare("font-size",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->pointsize=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- if (LocaleCompare("font-stretch",keyword) == 0)
- {
- ssize_t
- stretch;
- GetNextToken(q,&q,extent,token);
- stretch=ParseCommandOption(MagickStretchOptions,MagickFalse,token);
- if (stretch == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->stretch=(StretchType) stretch;
- break;
- }
- if (LocaleCompare("font-style",keyword) == 0)
- {
- ssize_t
- style;
- GetNextToken(q,&q,extent,token);
- style=ParseCommandOption(MagickStyleOptions,MagickFalse,token);
- if (style == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->style=(StyleType) style;
- break;
- }
- if (LocaleCompare("font-weight",keyword) == 0)
- {
- ssize_t
- weight;
- GetNextToken(q,&q,extent,token);
- weight=ParseCommandOption(MagickWeightOptions,MagickFalse,token);
- if (weight == -1)
- weight=(ssize_t) StringToUnsignedLong(token);
- graphic_context[n]->weight=(size_t) weight;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'g':
- case 'G':
- {
- if (LocaleCompare("gradient-units",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("gravity",keyword) == 0)
- {
- ssize_t
- gravity;
- GetNextToken(q,&q,extent,token);
- gravity=ParseCommandOption(MagickGravityOptions,MagickFalse,token);
- if (gravity == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->gravity=(GravityType) gravity;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'i':
- case 'I':
- {
- if (LocaleCompare("image",keyword) == 0)
- {
- ssize_t
- compose;
- primitive_type=ImagePrimitive;
- GetNextToken(q,&q,extent,token);
- compose=ParseCommandOption(MagickComposeOptions,MagickFalse,token);
- if (compose == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->compose=(CompositeOperator) compose;
- break;
- }
- if (LocaleCompare("interline-spacing",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->interline_spacing=StringToDouble(token,
- &next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- if (LocaleCompare("interword-spacing",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->interword_spacing=StringToDouble(token,
- &next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'k':
- case 'K':
- {
- if (LocaleCompare("kerning",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->kerning=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'l':
- case 'L':
- {
- if (LocaleCompare("letter-spacing",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
- clone_info->text=AcquireString(" ");
- status&=GetTypeMetrics(image,clone_info,&metrics,exception);
- graphic_context[n]->kerning=metrics.width*
- StringToDouble(token,&next_token);
- clone_info=DestroyDrawInfo(clone_info);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- if (LocaleCompare("line",keyword) == 0)
- {
- primitive_type=LinePrimitive;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'm':
- case 'M':
- {
- if (LocaleCompare("mask",keyword) == 0)
- {
- const char
- *mask_path;
- /*
- Take a node from within the MVG document, and duplicate it here.
- */
- GetNextToken(q,&q,extent,token);
- mask_path=(const char *) GetValueFromSplayTree(macros,token);
- if (mask_path != (const char *) NULL)
- {
- if (graphic_context[n]->composite_mask != (Image *) NULL)
- graphic_context[n]->composite_mask=
- DestroyImage(graphic_context[n]->composite_mask);
- graphic_context[n]->composite_mask=DrawCompositeMask(image,
- graphic_context[n],token,mask_path,exception);
- if (draw_info->compliance != SVGCompliance)
- status=SetImageMask(image,CompositePixelMask,
- graphic_context[n]->composite_mask,exception);
- }
- break;
- }
- break;
- }
- case 'o':
- case 'O':
- {
- if (LocaleCompare("offset",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("opacity",keyword) == 0)
- {
- double
- opacity;
- GetNextToken(q,&q,extent,token);
- if (graphic_context[n]->clip_path != MagickFalse)
- break;
- factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
- opacity=MagickMin(MagickMax(factor*
- StringToDouble(token,&next_token),0.0),1.0);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- graphic_context[n]->fill_alpha*=opacity;
- graphic_context[n]->stroke_alpha*=opacity;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'p':
- case 'P':
- {
- if (LocaleCompare("path",keyword) == 0)
- {
- primitive_type=PathPrimitive;
- break;
- }
- if (LocaleCompare("point",keyword) == 0)
- {
- primitive_type=PointPrimitive;
- break;
- }
- if (LocaleCompare("polyline",keyword) == 0)
- {
- primitive_type=PolylinePrimitive;
- break;
- }
- if (LocaleCompare("polygon",keyword) == 0)
- {
- primitive_type=PolygonPrimitive;
- break;
- }
- if (LocaleCompare("pop",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- if (LocaleCompare("class",token) == 0)
- break;
- if (LocaleCompare("clip-path",token) == 0)
- break;
- if (LocaleCompare("defs",token) == 0)
- {
- defsDepth--;
- graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
- MagickTrue;
- break;
- }
- if (LocaleCompare("gradient",token) == 0)
- break;
- if (LocaleCompare("graphic-context",token) == 0)
- {
- if (n <= 0)
- {
- (void) ThrowMagickException(exception,GetMagickModule(),
- DrawError,"UnbalancedGraphicContextPushPop","`%s'",token);
- status=MagickFalse;
- n=0;
- break;
- }
- if ((graphic_context[n]->clip_mask != (char *) NULL) &&
- (draw_info->compliance != SVGCompliance))
- if (LocaleCompare(graphic_context[n]->clip_mask,
- graphic_context[n-1]->clip_mask) != 0)
- status=SetImageMask(image,WritePixelMask,(Image *) NULL,
- exception);
- graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
- n--;
- break;
- }
- if (LocaleCompare("mask",token) == 0)
- break;
- if (LocaleCompare("pattern",token) == 0)
- break;
- if (LocaleCompare("symbol",token) == 0)
- {
- symbolDepth--;
- graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
- MagickTrue;
- break;
- }
- status=MagickFalse;
- break;
- }
- if (LocaleCompare("push",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- if (LocaleCompare("class",token) == 0)
- {
- /*
- Class context.
- */
- for (p=q; *q != '\0'; )
- {
- GetNextToken(q,&q,extent,token);
- if (LocaleCompare(token,"pop") != 0)
- continue;
- GetNextToken(q,(const char **) NULL,extent,token);
- if (LocaleCompare(token,"class") != 0)
- continue;
- break;
- }
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("clip-path",token) == 0)
- {
- GetNextToken(q,&q,extent,token);
- for (p=q; *q != '\0'; )
- {
- GetNextToken(q,&q,extent,token);
- if (LocaleCompare(token,"pop") != 0)
- continue;
- GetNextToken(q,(const char **) NULL,extent,token);
- if (LocaleCompare(token,"clip-path") != 0)
- continue;
- break;
- }
- if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
- {
- status=MagickFalse;
- break;
- }
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("defs",token) == 0)
- {
- defsDepth++;
- graphic_context[n]->render=defsDepth > 0 ? MagickFalse :
- MagickTrue;
- break;
- }
- if (LocaleCompare("gradient",token) == 0)
- {
- char
- key[2*MagickPathExtent],
- name[MagickPathExtent],
- type[MagickPathExtent];
- SegmentInfo
- segment;
- GetNextToken(q,&q,extent,token);
- (void) CopyMagickString(name,token,MagickPathExtent);
- GetNextToken(q,&q,extent,token);
- (void) CopyMagickString(type,token,MagickPathExtent);
- GetNextToken(q,&q,extent,token);
- segment.x1=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- segment.y1=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- segment.x2=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- segment.y2=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- if (LocaleCompare(type,"radial") == 0)
- {
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- }
- for (p=q; *q != '\0'; )
- {
- GetNextToken(q,&q,extent,token);
- if (LocaleCompare(token,"pop") != 0)
- continue;
- GetNextToken(q,(const char **) NULL,extent,token);
- if (LocaleCompare(token,"gradient") != 0)
- continue;
- break;
- }
- if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
- {
- status=MagickFalse;
- break;
- }
- (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
- bounds.x1=graphic_context[n]->affine.sx*segment.x1+
- graphic_context[n]->affine.ry*segment.y1+
- graphic_context[n]->affine.tx;
- bounds.y1=graphic_context[n]->affine.rx*segment.x1+
- graphic_context[n]->affine.sy*segment.y1+
- graphic_context[n]->affine.ty;
- bounds.x2=graphic_context[n]->affine.sx*segment.x2+
- graphic_context[n]->affine.ry*segment.y2+
- graphic_context[n]->affine.tx;
- bounds.y2=graphic_context[n]->affine.rx*segment.x2+
- graphic_context[n]->affine.sy*segment.y2+
- graphic_context[n]->affine.ty;
- (void) FormatLocaleString(key,MagickPathExtent,"%s",name);
- (void) SetImageArtifact(image,key,token);
- (void) FormatLocaleString(key,MagickPathExtent,"%s-type",name);
- (void) SetImageArtifact(image,key,type);
- (void) FormatLocaleString(key,MagickPathExtent,"%s-geometry",
- name);
- (void) FormatLocaleString(geometry,MagickPathExtent,
- "%gx%g%+.15g%+.15g",
- MagickMax(fabs(bounds.x2-bounds.x1+1.0),1.0),
- MagickMax(fabs(bounds.y2-bounds.y1+1.0),1.0),
- bounds.x1,bounds.y1);
- (void) SetImageArtifact(image,key,geometry);
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("graphic-context",token) == 0)
- {
- n++;
- graphic_context=(DrawInfo **) ResizeQuantumMemory(
- graphic_context,(size_t) (n+1),sizeof(*graphic_context));
- if (graphic_context == (DrawInfo **) NULL)
- {
- (void) ThrowMagickException(exception,GetMagickModule(),
- ResourceLimitError,"MemoryAllocationFailed","`%s'",
- image->filename);
- break;
- }
- graphic_context[n]=CloneDrawInfo((ImageInfo *) NULL,
- graphic_context[n-1]);
- if (*q == '"')
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("mask",token) == 0)
- {
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("pattern",token) == 0)
- {
- char
- key[2*MagickPathExtent],
- name[MagickPathExtent];
- RectangleInfo
- bounds;
- GetNextToken(q,&q,extent,token);
- (void) CopyMagickString(name,token,MagickPathExtent);
- GetNextToken(q,&q,extent,token);
- bounds.x=(ssize_t) ceil(StringToDouble(token,&next_token)-0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- bounds.y=(ssize_t) ceil(StringToDouble(token,&next_token)-0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- bounds.width=(size_t) floor(StringToDouble(token,&next_token)+
- 0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- bounds.height=(size_t) floor(StringToDouble(token,&next_token)+
- 0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- for (p=q; *q != '\0'; )
- {
- GetNextToken(q,&q,extent,token);
- if (LocaleCompare(token,"pop") != 0)
- continue;
- GetNextToken(q,(const char **) NULL,extent,token);
- if (LocaleCompare(token,"pattern") != 0)
- continue;
- break;
- }
- if ((q == (char *) NULL) || (p == (char *) NULL) || ((q-4) < p))
- {
- status=MagickFalse;
- break;
- }
- (void) CopyMagickString(token,p,(size_t) (q-p-4+1));
- (void) FormatLocaleString(key,MagickPathExtent,"%s",name);
- (void) SetImageArtifact(image,key,token);
- (void) FormatLocaleString(key,MagickPathExtent,"%s-geometry",
- name);
- (void) FormatLocaleString(geometry,MagickPathExtent,
- "%.20gx%.20g%+.20g%+.20g",(double) bounds.width,(double)
- bounds.height,(double) bounds.x,(double) bounds.y);
- (void) SetImageArtifact(image,key,geometry);
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("symbol",token) == 0)
- {
- symbolDepth++;
- graphic_context[n]->render=symbolDepth > 0 ? MagickFalse :
- MagickTrue;
- break;
- }
- status=MagickFalse;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'r':
- case 'R':
- {
- if (LocaleCompare("rectangle",keyword) == 0)
- {
- primitive_type=RectanglePrimitive;
- break;
- }
- if (LocaleCompare("rotate",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- angle=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- affine.sx=cos(DegreesToRadians(fmod((double) angle,360.0)));
- affine.rx=sin(DegreesToRadians(fmod((double) angle,360.0)));
- affine.ry=(-sin(DegreesToRadians(fmod((double) angle,360.0))));
- affine.sy=cos(DegreesToRadians(fmod((double) angle,360.0)));
- break;
- }
- if (LocaleCompare("roundRectangle",keyword) == 0)
- {
- primitive_type=RoundRectanglePrimitive;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 's':
- case 'S':
- {
- if (LocaleCompare("scale",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- affine.sx=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- affine.sy=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- if (LocaleCompare("skewX",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- angle=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- affine.ry=sin(DegreesToRadians(angle));
- break;
- }
- if (LocaleCompare("skewY",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- angle=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- affine.rx=(-tan(DegreesToRadians(angle)/2.0));
- break;
- }
- if (LocaleCompare("stop-color",keyword) == 0)
- {
- PixelInfo
- stop_color;
- number_stops++;
- if (number_stops == 1)
- stops=(StopInfo *) AcquireQuantumMemory(2,sizeof(*stops));
- else
- if (number_stops > 2)
- stops=(StopInfo *) ResizeQuantumMemory(stops,number_stops,
- sizeof(*stops));
- if (stops == (StopInfo *) NULL)
- {
- (void) ThrowMagickException(exception,GetMagickModule(),
- ResourceLimitError,"MemoryAllocationFailed","`%s'",
- image->filename);
- break;
- }
- GetNextToken(q,&q,extent,token);
- status&=QueryColorCompliance(token,AllCompliance,&stop_color,
- exception);
- stops[number_stops-1].color=stop_color;
- GetNextToken(q,&q,extent,token);
- factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
- stops[number_stops-1].offset=factor*StringToDouble(token,
- &next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- if (LocaleCompare("stroke",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- if (graphic_context[n]->clip_path != MagickFalse)
- break;
- (void) FormatLocaleString(pattern,MagickPathExtent,"%s",token);
- if (GetImageArtifact(image,pattern) != (const char *) NULL)
- (void) DrawPatternPath(image,draw_info,token,
- &graphic_context[n]->stroke_pattern,exception);
- else
- {
- status&=QueryColorCompliance(token,AllCompliance,
- &graphic_context[n]->stroke,exception);
- if (graphic_context[n]->stroke_alpha != OpaqueAlpha)
- graphic_context[n]->stroke.alpha=
- graphic_context[n]->stroke_alpha;
- }
- break;
- }
- if (LocaleCompare("stroke-antialias",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->stroke_antialias=StringToLong(token) != 0 ?
- MagickTrue : MagickFalse;
- break;
- }
- if (LocaleCompare("stroke-dasharray",keyword) == 0)
- {
- if (graphic_context[n]->dash_pattern != (double *) NULL)
- graphic_context[n]->dash_pattern=(double *)
- RelinquishMagickMemory(graphic_context[n]->dash_pattern);
- if (IsPoint(q) != MagickFalse)
- {
- const char
- *r;
- r=q;
- GetNextToken(r,&r,extent,token);
- if (*token == ',')
- GetNextToken(r,&r,extent,token);
- for (x=0; IsPoint(token) != MagickFalse; x++)
- {
- GetNextToken(r,&r,extent,token);
- if (*token == ',')
- GetNextToken(r,&r,extent,token);
- }
- graphic_context[n]->dash_pattern=(double *)
- AcquireQuantumMemory((size_t) (2*x+2),
- sizeof(*graphic_context[n]->dash_pattern));
- if (graphic_context[n]->dash_pattern == (double *) NULL)
- {
- (void) ThrowMagickException(exception,GetMagickModule(),
- ResourceLimitError,"MemoryAllocationFailed","`%s'",
- image->filename);
- status=MagickFalse;
- break;
- }
- (void) memset(graphic_context[n]->dash_pattern,0,(size_t)
- (2*x+2)*sizeof(*graphic_context[n]->dash_pattern));
- for (j=0; j < x; j++)
- {
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->dash_pattern[j]=StringToDouble(token,
- &next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- if (graphic_context[n]->dash_pattern[j] < 0.0)
- status=MagickFalse;
- }
- if ((x & 0x01) != 0)
- for ( ; j < (2*x); j++)
- graphic_context[n]->dash_pattern[j]=
- graphic_context[n]->dash_pattern[j-x];
- graphic_context[n]->dash_pattern[j]=0.0;
- break;
- }
- GetNextToken(q,&q,extent,token);
- break;
- }
- if (LocaleCompare("stroke-dashoffset",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->dash_offset=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- if (LocaleCompare("stroke-linecap",keyword) == 0)
- {
- ssize_t
- linecap;
- GetNextToken(q,&q,extent,token);
- linecap=ParseCommandOption(MagickLineCapOptions,MagickFalse,token);
- if (linecap == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->linecap=(LineCap) linecap;
- break;
- }
- if (LocaleCompare("stroke-linejoin",keyword) == 0)
- {
- ssize_t
- linejoin;
- GetNextToken(q,&q,extent,token);
- linejoin=ParseCommandOption(MagickLineJoinOptions,MagickFalse,
- token);
- if (linejoin == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->linejoin=(LineJoin) linejoin;
- break;
- }
- if (LocaleCompare("stroke-miterlimit",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->miterlimit=StringToUnsignedLong(token);
- break;
- }
- if (LocaleCompare("stroke-opacity",keyword) == 0)
- {
- double
- opacity;
- GetNextToken(q,&q,extent,token);
- if (graphic_context[n]->clip_path != MagickFalse)
- break;
- factor=strchr(token,'%') != (char *) NULL ? 0.01 : 1.0;
- opacity=MagickMin(MagickMax(factor*
- StringToDouble(token,&next_token),0.0),1.0);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- graphic_context[n]->stroke_alpha*=opacity;
- if (graphic_context[n]->stroke.alpha != TransparentAlpha)
- graphic_context[n]->stroke.alpha=graphic_context[n]->stroke_alpha;
- else
- graphic_context[n]->stroke.alpha=(MagickRealType)
- ClampToQuantum(QuantumRange*(1.0-opacity));
- break;
- }
- if (LocaleCompare("stroke-width",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- if (graphic_context[n]->clip_path != MagickFalse)
- break;
- graphic_context[n]->stroke_width=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- status=MagickFalse;
- break;
- }
- case 't':
- case 'T':
- {
- if (LocaleCompare("text",keyword) == 0)
- {
- primitive_type=TextPrimitive;
- break;
- }
- if (LocaleCompare("text-align",keyword) == 0)
- {
- ssize_t
- align;
- GetNextToken(q,&q,extent,token);
- align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
- if (align == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->align=(AlignType) align;
- break;
- }
- if (LocaleCompare("text-anchor",keyword) == 0)
- {
- ssize_t
- align;
- GetNextToken(q,&q,extent,token);
- align=ParseCommandOption(MagickAlignOptions,MagickFalse,token);
- if (align == -1)
- {
- status=MagickFalse;
- break;
- }
- graphic_context[n]->align=(AlignType) align;
- break;
- }
- if (LocaleCompare("text-antialias",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->text_antialias=StringToLong(token) != 0 ?
- MagickTrue : MagickFalse;
- break;
- }
- if (LocaleCompare("text-undercolor",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- status&=QueryColorCompliance(token,AllCompliance,
- &graphic_context[n]->undercolor,exception);
- break;
- }
- if (LocaleCompare("translate",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- affine.tx=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- affine.ty=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- cursor=0.0;
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'u':
- case 'U':
- {
- if (LocaleCompare("use",keyword) == 0)
- {
- const char
- *use;
- /*
- Get a macro from the MVG document, and "use" it here.
- */
- GetNextToken(q,&q,extent,token);
- use=(const char *) GetValueFromSplayTree(macros,token);
- if (use != (const char *) NULL)
- {
- clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
- (void) CloneString(&clone_info->primitive,use);
- status=RenderMVGContent(image,clone_info,depth+1,exception);
- clone_info=DestroyDrawInfo(clone_info);
- }
- break;
- }
- break;
- }
- case 'v':
- case 'V':
- {
- if (LocaleCompare("viewbox",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->viewbox.x=(ssize_t) ceil(StringToDouble(token,
- &next_token)-0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->viewbox.y=(ssize_t) ceil(StringToDouble(token,
- &next_token)-0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->viewbox.width=(size_t) floor(StringToDouble(
- token,&next_token)+0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->viewbox.height=(size_t) floor(StringToDouble(
- token,&next_token)+0.5);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- status=MagickFalse;
- break;
- }
- case 'w':
- case 'W':
- {
- if (LocaleCompare("word-spacing",keyword) == 0)
- {
- GetNextToken(q,&q,extent,token);
- graphic_context[n]->interword_spacing=StringToDouble(token,
- &next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- break;
- }
- status=MagickFalse;
- break;
- }
- default:
- {
- status=MagickFalse;
- break;
- }
- }
- if (status == MagickFalse)
- break;
- if ((fabs(affine.sx-1.0) >= MagickEpsilon) ||
- (fabs(affine.rx) >= MagickEpsilon) || (fabs(affine.ry) >= MagickEpsilon) ||
- (fabs(affine.sy-1.0) >= MagickEpsilon) ||
- (fabs(affine.tx) >= MagickEpsilon) || (fabs(affine.ty) >= MagickEpsilon))
- {
- graphic_context[n]->affine.sx=current.sx*affine.sx+current.ry*affine.rx;
- graphic_context[n]->affine.rx=current.rx*affine.sx+current.sy*affine.rx;
- graphic_context[n]->affine.ry=current.sx*affine.ry+current.ry*affine.sy;
- graphic_context[n]->affine.sy=current.rx*affine.ry+current.sy*affine.sy;
- graphic_context[n]->affine.tx=current.sx*affine.tx+current.ry*affine.ty+
- current.tx;
- graphic_context[n]->affine.ty=current.rx*affine.tx+current.sy*affine.ty+
- current.ty;
- }
- if (primitive_type == UndefinedPrimitive)
- {
- if (*q == '\0')
- {
- if (number_stops > 1)
- {
- GradientType
- type;
- type=LinearGradient;
- if (draw_info->gradient.type == RadialGradient)
- type=RadialGradient;
- (void) GradientImage(image,type,PadSpread,stops,number_stops,
- exception);
- }
- if (number_stops > 0)
- stops=(StopInfo *) RelinquishMagickMemory(stops);
- }
- if ((image->debug != MagickFalse) && (q > p))
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int)
- (q-p-1),p);
- continue;
- }
- /*
- Parse the primitive attributes.
- */
- for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
- if ((primitive_info[i].primitive == TextPrimitive) ||
- (primitive_info[i].primitive == ImagePrimitive))
- if (primitive_info[i].text != (char *) NULL)
- primitive_info[i].text=DestroyString(primitive_info[i].text);
- i=0;
- mvg_info.offset=i;
- j=0;
- primitive_info[0].point.x=0.0;
- primitive_info[0].point.y=0.0;
- primitive_info[0].coordinates=0;
- primitive_info[0].method=FloodfillMethod;
- primitive_info[0].closed_subpath=MagickFalse;
- for (x=0; *q != '\0'; x++)
- {
- /*
- Define points.
- */
- if (IsPoint(q) == MagickFalse)
- break;
- GetNextToken(q,&q,extent,token);
- point.x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,&q,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- point.y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(q,(const char **) NULL,extent,token);
- if (*token == ',')
- GetNextToken(q,&q,extent,token);
- primitive_info[i].primitive=primitive_type;
- primitive_info[i].point=point;
- primitive_info[i].coordinates=0;
- primitive_info[i].method=FloodfillMethod;
- primitive_info[i].closed_subpath=MagickFalse;
- i++;
- mvg_info.offset=i;
- if (i < (ssize_t) number_points)
- continue;
- status&=CheckPrimitiveExtent(&mvg_info,number_points);
- }
- if (status == MagickFalse)
- break;
- if ((primitive_info[j].primitive == TextPrimitive) ||
- (primitive_info[j].primitive == ImagePrimitive))
- if (primitive_info[j].text != (char *) NULL)
- primitive_info[j].text=DestroyString(primitive_info[j].text);
- primitive_info[j].primitive=primitive_type;
- primitive_info[j].coordinates=(size_t) x;
- primitive_info[j].method=FloodfillMethod;
- primitive_info[j].closed_subpath=MagickFalse;
- /*
- Circumscribe primitive within a circle.
- */
- bounds.x1=primitive_info[j].point.x;
- bounds.y1=primitive_info[j].point.y;
- bounds.x2=primitive_info[j].point.x;
- bounds.y2=primitive_info[j].point.y;
- for (k=1; k < (ssize_t) primitive_info[j].coordinates; k++)
- {
- point=primitive_info[j+k].point;
- if (point.x < bounds.x1)
- bounds.x1=point.x;
- if (point.y < bounds.y1)
- bounds.y1=point.y;
- if (point.x > bounds.x2)
- bounds.x2=point.x;
- if (point.y > bounds.y2)
- bounds.y2=point.y;
- }
- /*
- Speculate how many points our primitive might consume.
- */
- coordinates=(double) primitive_info[j].coordinates;
- switch (primitive_type)
- {
- case RectanglePrimitive:
- {
- coordinates*=5.0;
- break;
- }
- case RoundRectanglePrimitive:
- {
- double
- alpha,
- beta,
- radius;
- alpha=bounds.x2-bounds.x1;
- beta=bounds.y2-bounds.y1;
- radius=hypot((double) alpha,(double) beta);
- coordinates*=5.0;
- coordinates+=2.0*((size_t) ceil((double) MagickPI*radius))+6.0*
- BezierQuantum+360.0;
- break;
- }
- case BezierPrimitive:
- {
- coordinates=(double) (BezierQuantum*primitive_info[j].coordinates);
- if (primitive_info[j].coordinates > (107*BezierQuantum))
- {
- (void) ThrowMagickException(exception,GetMagickModule(),DrawError,
- "TooManyBezierCoordinates","`%s'",token);
- status=MagickFalse;
- break;
- }
- break;
- }
- case PathPrimitive:
- {
- char
- *s,
- *t;
- GetNextToken(q,&q,extent,token);
- coordinates=1.0;
- t=token;
- for (s=token; *s != '\0'; s=t)
- {
- double
- value;
- value=StringToDouble(s,&t);
- (void) value;
- if (s == t)
- {
- t++;
- continue;
- }
- coordinates++;
- }
- for (s=token; *s != '\0'; s++)
- if (strspn(s,"AaCcQqSsTt") != 0)
- coordinates+=(20.0*BezierQuantum)+360.0;
- break;
- }
- case CirclePrimitive:
- case ArcPrimitive:
- case EllipsePrimitive:
- {
- double
- alpha,
- beta,
- radius;
- alpha=bounds.x2-bounds.x1;
- beta=bounds.y2-bounds.y1;
- radius=hypot(alpha,beta);
- coordinates=2.0*(ceil(MagickPI*radius))+6.0*BezierQuantum+360.0;
- break;
- }
- default:
- break;
- }
- if (coordinates > MaxBezierCoordinates)
- {
- (void) ThrowMagickException(exception,GetMagickModule(),
- ResourceLimitError,"TooManyBezierCoordinates","`%s'",token);
- status=MagickFalse;
- }
- if (status == MagickFalse)
- break;
- if (((size_t) (i+coordinates)) >= number_points)
- {
- /*
- Resize based on speculative points required by primitive.
- */
- number_points+=coordinates+1;
- if (number_points < (size_t) coordinates)
- {
- (void) ThrowMagickException(exception,GetMagickModule(),
- ResourceLimitError,"MemoryAllocationFailed","`%s'",
- image->filename);
- break;
- }
- mvg_info.offset=i;
- status&=CheckPrimitiveExtent(&mvg_info,number_points);
- }
- status&=CheckPrimitiveExtent(&mvg_info,PrimitiveExtentPad);
- if (status == MagickFalse)
- break;
- mvg_info.offset=j;
- switch (primitive_type)
- {
- case PointPrimitive:
- default:
- {
- if (primitive_info[j].coordinates != 1)
- {
- status=MagickFalse;
- break;
- }
- status&=TracePoint(primitive_info+j,primitive_info[j].point);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case LinePrimitive:
- {
- if (primitive_info[j].coordinates != 2)
- {
- status=MagickFalse;
- break;
- }
- status&=TraceLine(primitive_info+j,primitive_info[j].point,
- primitive_info[j+1].point);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case RectanglePrimitive:
- {
- if (primitive_info[j].coordinates != 2)
- {
- status=MagickFalse;
- break;
- }
- status&=TraceRectangle(primitive_info+j,primitive_info[j].point,
- primitive_info[j+1].point);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case RoundRectanglePrimitive:
- {
- if (primitive_info[j].coordinates != 3)
- {
- status=MagickFalse;
- break;
- }
- if ((primitive_info[j+2].point.x < 0.0) ||
- (primitive_info[j+2].point.y < 0.0))
- {
- status=MagickFalse;
- break;
- }
- if ((primitive_info[j+1].point.x-primitive_info[j].point.x) < 0.0)
- {
- status=MagickFalse;
- break;
- }
- if ((primitive_info[j+1].point.y-primitive_info[j].point.y) < 0.0)
- {
- status=MagickFalse;
- break;
- }
- status&=TraceRoundRectangle(&mvg_info,primitive_info[j].point,
- primitive_info[j+1].point,primitive_info[j+2].point);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case ArcPrimitive:
- {
- if (primitive_info[j].coordinates != 3)
- {
- primitive_type=UndefinedPrimitive;
- break;
- }
- status&=TraceArc(&mvg_info,primitive_info[j].point,
- primitive_info[j+1].point,primitive_info[j+2].point);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case EllipsePrimitive:
- {
- if (primitive_info[j].coordinates != 3)
- {
- status=MagickFalse;
- break;
- }
- if ((primitive_info[j+1].point.x < 0.0) ||
- (primitive_info[j+1].point.y < 0.0))
- {
- status=MagickFalse;
- break;
- }
- status&=TraceEllipse(&mvg_info,primitive_info[j].point,
- primitive_info[j+1].point,primitive_info[j+2].point);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case CirclePrimitive:
- {
- if (primitive_info[j].coordinates != 2)
- {
- status=MagickFalse;
- break;
- }
- status&=TraceCircle(&mvg_info,primitive_info[j].point,
- primitive_info[j+1].point);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case PolylinePrimitive:
- {
- if (primitive_info[j].coordinates < 1)
- {
- status=MagickFalse;
- break;
- }
- break;
- }
- case PolygonPrimitive:
- {
- if (primitive_info[j].coordinates < 3)
- {
- status=MagickFalse;
- break;
- }
- primitive_info[i]=primitive_info[j];
- primitive_info[i].coordinates=0;
- primitive_info[j].coordinates++;
- primitive_info[j].closed_subpath=MagickTrue;
- i++;
- break;
- }
- case BezierPrimitive:
- {
- if (primitive_info[j].coordinates < 3)
- {
- status=MagickFalse;
- break;
- }
- status&=TraceBezier(&mvg_info,primitive_info[j].coordinates);
- i=(ssize_t) (j+primitive_info[j].coordinates);
- break;
- }
- case PathPrimitive:
- {
- coordinates=(double) TracePath(&mvg_info,token,exception);
- if (coordinates == 0.0)
- {
- status=MagickFalse;
- break;
- }
- i=(ssize_t) (j+coordinates);
- break;
- }
- case AlphaPrimitive:
- case ColorPrimitive:
- {
- ssize_t
- method;
- if (primitive_info[j].coordinates != 1)
- {
- status=MagickFalse;
- break;
- }
- GetNextToken(q,&q,extent,token);
- method=ParseCommandOption(MagickMethodOptions,MagickFalse,token);
- if (method == -1)
- {
- status=MagickFalse;
- break;
- }
- primitive_info[j].method=(PaintMethod) method;
- break;
- }
- case TextPrimitive:
- {
- char
- geometry[MagickPathExtent];
- if (primitive_info[j].coordinates != 1)
- {
- status=MagickFalse;
- break;
- }
- if (*token != ',')
- GetNextToken(q,&q,extent,token);
- (void) CloneString(&primitive_info[j].text,token);
- /*
- Compute text cursor offset.
- */
- clone_info=CloneDrawInfo((ImageInfo *) NULL,graphic_context[n]);
- if ((fabs(mvg_info.point.x-primitive_info->point.x) < MagickEpsilon) &&
- (fabs(mvg_info.point.y-primitive_info->point.y) < MagickEpsilon))
- {
- mvg_info.point=primitive_info->point;
- primitive_info->point.x+=cursor;
- }
- else
- {
- mvg_info.point=primitive_info->point;
- cursor=0.0;
- }
- (void) FormatLocaleString(geometry,MagickPathExtent,"%+f%+f",
- primitive_info->point.x,primitive_info->point.y);
- clone_info->render=MagickFalse;
- clone_info->text=AcquireString(token);
- (void) ConcatenateString(&clone_info->text," ");
- status&=GetTypeMetrics(image,clone_info,&metrics,exception);
- clone_info=DestroyDrawInfo(clone_info);
- cursor+=metrics.width;
- break;
- }
- case ImagePrimitive:
- {
- if (primitive_info[j].coordinates != 2)
- {
- status=MagickFalse;
- break;
- }
- GetNextToken(q,&q,extent,token);
- (void) CloneString(&primitive_info[j].text,token);
- break;
- }
- }
- mvg_info.offset=i;
- if ((image->debug != MagickFalse) && (q > p))
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," %.*s",(int) (q-p-1),
- p);
- if (status == MagickFalse)
- break;
- primitive_info[i].primitive=UndefinedPrimitive;
- if (i == 0)
- continue;
- /*
- Transform points.
- */
- for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
- {
- point=primitive_info[i].point;
- primitive_info[i].point.x=graphic_context[n]->affine.sx*point.x+
- graphic_context[n]->affine.ry*point.y+graphic_context[n]->affine.tx;
- primitive_info[i].point.y=graphic_context[n]->affine.rx*point.x+
- graphic_context[n]->affine.sy*point.y+graphic_context[n]->affine.ty;
- point=primitive_info[i].point;
- if (point.x < graphic_context[n]->bounds.x1)
- graphic_context[n]->bounds.x1=point.x;
- if (point.y < graphic_context[n]->bounds.y1)
- graphic_context[n]->bounds.y1=point.y;
- if (point.x > graphic_context[n]->bounds.x2)
- graphic_context[n]->bounds.x2=point.x;
- if (point.y > graphic_context[n]->bounds.y2)
- graphic_context[n]->bounds.y2=point.y;
- if (primitive_info[i].primitive == ImagePrimitive)
- break;
- if (i >= (ssize_t) number_points)
- ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
- }
- if (graphic_context[n]->render != MagickFalse)
- {
- if ((n != 0) && (draw_info->compliance != SVGCompliance) &&
- (graphic_context[n]->clip_mask != (char *) NULL) &&
- (LocaleCompare(graphic_context[n]->clip_mask,
- graphic_context[n-1]->clip_mask) != 0))
- {
- const char
- *clip_path;
- clip_path=(const char *) GetValueFromSplayTree(macros,
- graphic_context[n]->clip_mask);
- if (clip_path != (const char *) NULL)
- (void) SetImageArtifact(image,graphic_context[n]->clip_mask,
- clip_path);
- status&=DrawClipPath(image,graphic_context[n],
- graphic_context[n]->clip_mask,exception);
- }
- status&=DrawPrimitive(image,graphic_context[n],primitive_info,
- exception);
- }
- proceed=SetImageProgress(image,RenderImageTag,q-primitive,(MagickSizeType)
- primitive_extent);
- if (proceed == MagickFalse)
- break;
- if (status == 0)
- break;
- }
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end draw-image");
- /*
- Relinquish resources.
- */
- macros=DestroySplayTree(macros);
- token=DestroyString(token);
- if (primitive_info != (PrimitiveInfo *) NULL)
- {
- for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
- if ((primitive_info[i].primitive == TextPrimitive) ||
- (primitive_info[i].primitive == ImagePrimitive))
- if (primitive_info[i].text != (char *) NULL)
- primitive_info[i].text=DestroyString(primitive_info[i].text);
- primitive_info=(PrimitiveInfo *) RelinquishMagickMemory(primitive_info);
- }
- primitive=DestroyString(primitive);
- if (stops != (StopInfo *) NULL)
- stops=(StopInfo *) RelinquishMagickMemory(stops);
- for ( ; n >= 0; n--)
- graphic_context[n]=DestroyDrawInfo(graphic_context[n]);
- graphic_context=(DrawInfo **) RelinquishMagickMemory(graphic_context);
- if (status == MagickFalse)
- ThrowBinaryException(DrawError,"NonconformingDrawingPrimitiveDefinition",
- keyword);
- return(status != 0 ? MagickTrue : MagickFalse);
- }
- MagickExport MagickBooleanType DrawImage(Image *image,const DrawInfo *draw_info,
- ExceptionInfo *exception)
- {
- return(RenderMVGContent(image,draw_info,0,exception));
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w P a t t e r n P a t h %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawPatternPath() draws a pattern.
- %
- % The format of the DrawPatternPath method is:
- %
- % MagickBooleanType DrawPatternPath(Image *image,const DrawInfo *draw_info,
- % const char *name,Image **pattern,ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o name: the pattern name.
- %
- % o image: the image.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- MagickExport MagickBooleanType DrawPatternPath(Image *image,
- const DrawInfo *draw_info,const char *name,Image **pattern,
- ExceptionInfo *exception)
- {
- char
- property[MagickPathExtent];
- const char
- *geometry,
- *path,
- *type;
- DrawInfo
- *clone_info;
- ImageInfo
- *image_info;
- MagickBooleanType
- status;
- assert(image != (Image *) NULL);
- assert(image->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
- assert(draw_info != (const DrawInfo *) NULL);
- assert(name != (const char *) NULL);
- (void) FormatLocaleString(property,MagickPathExtent,"%s",name);
- path=GetImageArtifact(image,property);
- if (path == (const char *) NULL)
- return(MagickFalse);
- (void) FormatLocaleString(property,MagickPathExtent,"%s-geometry",name);
- geometry=GetImageArtifact(image,property);
- if (geometry == (const char *) NULL)
- return(MagickFalse);
- if ((*pattern) != (Image *) NULL)
- *pattern=DestroyImage(*pattern);
- image_info=AcquireImageInfo();
- image_info->size=AcquireString(geometry);
- *pattern=AcquireImage(image_info,exception);
- image_info=DestroyImageInfo(image_info);
- (void) QueryColorCompliance("#000000ff",AllCompliance,
- &(*pattern)->background_color,exception);
- (void) SetImageBackgroundColor(*pattern,exception);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- "begin pattern-path %s %s",name,geometry);
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- clone_info->fill_pattern=NewImageList();
- clone_info->stroke_pattern=NewImageList();
- (void) FormatLocaleString(property,MagickPathExtent,"%s-type",name);
- type=GetImageArtifact(image,property);
- if (type != (const char *) NULL)
- clone_info->gradient.type=(GradientType) ParseCommandOption(
- MagickGradientOptions,MagickFalse,type);
- (void) CloneString(&clone_info->primitive,path);
- status=RenderMVGContent(*pattern,clone_info,0,exception);
- clone_info=DestroyDrawInfo(clone_info);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),"end pattern-path");
- return(status);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + D r a w P o l y g o n P r i m i t i v e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawPolygonPrimitive() draws a polygon on the image.
- %
- % The format of the DrawPolygonPrimitive method is:
- %
- % MagickBooleanType DrawPolygonPrimitive(Image *image,
- % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
- % ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static PolygonInfo **DestroyPolygonThreadSet(PolygonInfo **polygon_info)
- {
- register ssize_t
- i;
- assert(polygon_info != (PolygonInfo **) NULL);
- for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
- if (polygon_info[i] != (PolygonInfo *) NULL)
- polygon_info[i]=DestroyPolygonInfo(polygon_info[i]);
- polygon_info=(PolygonInfo **) RelinquishMagickMemory(polygon_info);
- return(polygon_info);
- }
- static PolygonInfo **AcquirePolygonThreadSet(
- const PrimitiveInfo *primitive_info)
- {
- PathInfo
- *magick_restrict path_info;
- PolygonInfo
- **polygon_info;
- register ssize_t
- i;
- size_t
- number_threads;
- number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
- polygon_info=(PolygonInfo **) AcquireQuantumMemory(number_threads,
- sizeof(*polygon_info));
- if (polygon_info == (PolygonInfo **) NULL)
- return((PolygonInfo **) NULL);
- (void) memset(polygon_info,0,number_threads*sizeof(*polygon_info));
- path_info=ConvertPrimitiveToPath(primitive_info);
- if (path_info == (PathInfo *) NULL)
- return(DestroyPolygonThreadSet(polygon_info));
- for (i=0; i < (ssize_t) number_threads; i++)
- {
- polygon_info[i]=ConvertPathToPolygon(path_info);
- if (polygon_info[i] == (PolygonInfo *) NULL)
- return(DestroyPolygonThreadSet(polygon_info));
- }
- path_info=(PathInfo *) RelinquishMagickMemory(path_info);
- return(polygon_info);
- }
- static double GetFillAlpha(PolygonInfo *polygon_info,const double mid,
- const MagickBooleanType fill,const FillRule fill_rule,const ssize_t x,
- const ssize_t y,double *stroke_alpha)
- {
- double
- alpha,
- beta,
- distance,
- subpath_alpha;
- PointInfo
- delta;
- register const PointInfo
- *q;
- register EdgeInfo
- *p;
- register ssize_t
- i;
- ssize_t
- j,
- winding_number;
- /*
- Compute fill & stroke opacity for this (x,y) point.
- */
- *stroke_alpha=0.0;
- subpath_alpha=0.0;
- p=polygon_info->edges;
- for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
- {
- if ((double) y <= (p->bounds.y1-mid-0.5))
- break;
- if ((double) y > (p->bounds.y2+mid+0.5))
- {
- (void) DestroyEdge(polygon_info,(size_t) j);
- continue;
- }
- if (((double) x <= (p->bounds.x1-mid-0.5)) ||
- ((double) x > (p->bounds.x2+mid+0.5)))
- continue;
- i=(ssize_t) MagickMax((double) p->highwater,1.0);
- for ( ; i < (ssize_t) p->number_points; i++)
- {
- if ((double) y <= (p->points[i-1].y-mid-0.5))
- break;
- if ((double) y > (p->points[i].y+mid+0.5))
- continue;
- if (p->scanline != (double) y)
- {
- p->scanline=(double) y;
- p->highwater=(size_t) i;
- }
- /*
- Compute distance between a point and an edge.
- */
- q=p->points+i-1;
- delta.x=(q+1)->x-q->x;
- delta.y=(q+1)->y-q->y;
- beta=delta.x*(x-q->x)+delta.y*(y-q->y);
- if (beta <= 0.0)
- {
- delta.x=(double) x-q->x;
- delta.y=(double) y-q->y;
- distance=delta.x*delta.x+delta.y*delta.y;
- }
- else
- {
- alpha=delta.x*delta.x+delta.y*delta.y;
- if (beta >= alpha)
- {
- delta.x=(double) x-(q+1)->x;
- delta.y=(double) y-(q+1)->y;
- distance=delta.x*delta.x+delta.y*delta.y;
- }
- else
- {
- alpha=PerceptibleReciprocal(alpha);
- beta=delta.x*(y-q->y)-delta.y*(x-q->x);
- distance=alpha*beta*beta;
- }
- }
- /*
- Compute stroke & subpath opacity.
- */
- beta=0.0;
- if (p->ghostline == MagickFalse)
- {
- alpha=mid+0.5;
- if ((*stroke_alpha < 1.0) &&
- (distance <= ((alpha+0.25)*(alpha+0.25))))
- {
- alpha=mid-0.5;
- if (distance <= ((alpha+0.25)*(alpha+0.25)))
- *stroke_alpha=1.0;
- else
- {
- beta=1.0;
- if (fabs(distance-1.0) >= MagickEpsilon)
- beta=sqrt((double) distance);
- alpha=beta-mid-0.5;
- if (*stroke_alpha < ((alpha-0.25)*(alpha-0.25)))
- *stroke_alpha=(alpha-0.25)*(alpha-0.25);
- }
- }
- }
- if ((fill == MagickFalse) || (distance > 1.0) || (subpath_alpha >= 1.0))
- continue;
- if (distance <= 0.0)
- {
- subpath_alpha=1.0;
- continue;
- }
- if (distance > 1.0)
- continue;
- if (fabs(beta) < MagickEpsilon)
- {
- beta=1.0;
- if (fabs(distance-1.0) >= MagickEpsilon)
- beta=sqrt(distance);
- }
- alpha=beta-1.0;
- if (subpath_alpha < (alpha*alpha))
- subpath_alpha=alpha*alpha;
- }
- }
- /*
- Compute fill opacity.
- */
- if (fill == MagickFalse)
- return(0.0);
- if (subpath_alpha >= 1.0)
- return(1.0);
- /*
- Determine winding number.
- */
- winding_number=0;
- p=polygon_info->edges;
- for (j=0; j < (ssize_t) polygon_info->number_edges; j++, p++)
- {
- if ((double) y <= p->bounds.y1)
- break;
- if (((double) y > p->bounds.y2) || ((double) x <= p->bounds.x1))
- continue;
- if ((double) x > p->bounds.x2)
- {
- winding_number+=p->direction ? 1 : -1;
- continue;
- }
- i=(ssize_t) MagickMax((double) p->highwater,1.0);
- for ( ; i < (ssize_t) (p->number_points-1); i++)
- if ((double) y <= p->points[i].y)
- break;
- q=p->points+i-1;
- if ((((q+1)->x-q->x)*(y-q->y)) <= (((q+1)->y-q->y)*(x-q->x)))
- winding_number+=p->direction ? 1 : -1;
- }
- if (fill_rule != NonZeroRule)
- {
- if ((MagickAbsoluteValue(winding_number) & 0x01) != 0)
- return(1.0);
- }
- else
- if (MagickAbsoluteValue(winding_number) != 0)
- return(1.0);
- return(subpath_alpha);
- }
- static MagickBooleanType DrawPolygonPrimitive(Image *image,
- const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
- ExceptionInfo *exception)
- {
- CacheView
- *image_view;
- MagickBooleanType
- fill,
- status;
- double
- mid;
- PolygonInfo
- **magick_restrict polygon_info;
- register EdgeInfo
- *p;
- register ssize_t
- i;
- SegmentInfo
- bounds;
- ssize_t
- start_y,
- stop_y,
- y;
- assert(image != (Image *) NULL);
- assert(image->signature == MagickCoreSignature);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
- assert(draw_info != (DrawInfo *) NULL);
- assert(draw_info->signature == MagickCoreSignature);
- assert(primitive_info != (PrimitiveInfo *) NULL);
- if (primitive_info->coordinates <= 1)
- return(MagickTrue);
- /*
- Compute bounding box.
- */
- polygon_info=AcquirePolygonThreadSet(primitive_info);
- if (polygon_info == (PolygonInfo **) NULL)
- return(MagickFalse);
- DisableMSCWarning(4127)
- if (0)
- {
- status=DrawBoundingRectangles(image,draw_info,polygon_info[0],exception);
- if (status == MagickFalse)
- {
- polygon_info=DestroyPolygonThreadSet(polygon_info);
- return(status);
- }
- }
- RestoreMSCWarning
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," begin draw-polygon");
- fill=(primitive_info->method == FillToBorderMethod) ||
- (primitive_info->method == FloodfillMethod) ? MagickTrue : MagickFalse;
- mid=ExpandAffine(&draw_info->affine)*SaneStrokeWidth(image,draw_info)/2.0;
- bounds=polygon_info[0]->edges[0].bounds;
- for (i=1; i < (ssize_t) polygon_info[0]->number_edges; i++)
- {
- p=polygon_info[0]->edges+i;
- if (p->bounds.x1 < bounds.x1)
- bounds.x1=p->bounds.x1;
- if (p->bounds.y1 < bounds.y1)
- bounds.y1=p->bounds.y1;
- if (p->bounds.x2 > bounds.x2)
- bounds.x2=p->bounds.x2;
- if (p->bounds.y2 > bounds.y2)
- bounds.y2=p->bounds.y2;
- }
- bounds.x1-=(mid+1.0);
- bounds.y1-=(mid+1.0);
- bounds.x2+=(mid+1.0);
- bounds.y2+=(mid+1.0);
- if ((bounds.x1 >= (double) image->columns) ||
- (bounds.y1 >= (double) image->rows) ||
- (bounds.x2 <= 0.0) || (bounds.y2 <= 0.0))
- {
- polygon_info=DestroyPolygonThreadSet(polygon_info);
- return(MagickTrue); /* virtual polygon */
- }
- bounds.x1=bounds.x1 < 0.0 ? 0.0 : bounds.x1 >= (double) image->columns-1.0 ?
- (double) image->columns-1.0 : bounds.x1;
- bounds.y1=bounds.y1 < 0.0 ? 0.0 : bounds.y1 >= (double) image->rows-1.0 ?
- (double) image->rows-1.0 : bounds.y1;
- bounds.x2=bounds.x2 < 0.0 ? 0.0 : bounds.x2 >= (double) image->columns-1.0 ?
- (double) image->columns-1.0 : bounds.x2;
- bounds.y2=bounds.y2 < 0.0 ? 0.0 : bounds.y2 >= (double) image->rows-1.0 ?
- (double) image->rows-1.0 : bounds.y2;
- status=MagickTrue;
- image_view=AcquireAuthenticCacheView(image,exception);
- if ((primitive_info->coordinates == 1) ||
- (polygon_info[0]->number_edges == 0))
- {
- /*
- Draw point.
- */
- start_y=(ssize_t) ceil(bounds.y1-0.5);
- stop_y=(ssize_t) floor(bounds.y2+0.5);
- #if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static) shared(status) \
- magick_number_threads(image,image,stop_y-start_y+1,1)
- #endif
- for (y=start_y; y <= stop_y; y++)
- {
- MagickBooleanType
- sync;
- PixelInfo
- pixel;
- register ssize_t
- x;
- register Quantum
- *magick_restrict q;
- ssize_t
- start_x,
- stop_x;
- if (status == MagickFalse)
- continue;
- start_x=(ssize_t) ceil(bounds.x1-0.5);
- stop_x=(ssize_t) floor(bounds.x2+0.5);
- x=start_x;
- q=GetCacheViewAuthenticPixels(image_view,x,y,(size_t) (stop_x-x+1),1,
- exception);
- if (q == (Quantum *) NULL)
- {
- status=MagickFalse;
- continue;
- }
- GetPixelInfo(image,&pixel);
- for ( ; x <= stop_x; x++)
- {
- if ((x == (ssize_t) ceil(primitive_info->point.x-0.5)) &&
- (y == (ssize_t) ceil(primitive_info->point.y-0.5)))
- {
- GetFillColor(draw_info,x-start_x,y-start_y,&pixel,exception);
- SetPixelViaPixelInfo(image,&pixel,q);
- }
- q+=GetPixelChannels(image);
- }
- sync=SyncCacheViewAuthenticPixels(image_view,exception);
- if (sync == MagickFalse)
- status=MagickFalse;
- }
- image_view=DestroyCacheView(image_view);
- polygon_info=DestroyPolygonThreadSet(polygon_info);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " end draw-polygon");
- return(status);
- }
- /*
- Draw polygon or line.
- */
- start_y=(ssize_t) ceil(bounds.y1-0.5);
- stop_y=(ssize_t) floor(bounds.y2+0.5);
- #if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static) shared(status) \
- magick_number_threads(image,image,stop_y-start_y+1,1)
- #endif
- for (y=start_y; y <= stop_y; y++)
- {
- const int
- id = GetOpenMPThreadId();
- register Quantum
- *magick_restrict q;
- register ssize_t
- x;
- ssize_t
- start_x,
- stop_x;
- if (status == MagickFalse)
- continue;
- start_x=(ssize_t) ceil(bounds.x1-0.5);
- stop_x=(ssize_t) floor(bounds.x2+0.5);
- q=GetCacheViewAuthenticPixels(image_view,start_x,y,(size_t) (stop_x-start_x+
- 1),1,exception);
- if (q == (Quantum *) NULL)
- {
- status=MagickFalse;
- continue;
- }
- for (x=start_x; x <= stop_x; x++)
- {
- double
- fill_alpha,
- stroke_alpha;
- PixelInfo
- fill_color,
- stroke_color;
- /*
- Fill and/or stroke.
- */
- fill_alpha=GetFillAlpha(polygon_info[id],mid,fill,draw_info->fill_rule,
- x,y,&stroke_alpha);
- if (draw_info->stroke_antialias == MagickFalse)
- {
- fill_alpha=fill_alpha > 0.25 ? 1.0 : 0.0;
- stroke_alpha=stroke_alpha > 0.25 ? 1.0 : 0.0;
- }
- GetFillColor(draw_info,x-start_x,y-start_y,&fill_color,exception);
- CompositePixelOver(image,&fill_color,fill_alpha*fill_color.alpha,q,
- (double) GetPixelAlpha(image,q),q);
- GetStrokeColor(draw_info,x-start_x,y-start_y,&stroke_color,exception);
- CompositePixelOver(image,&stroke_color,stroke_alpha*stroke_color.alpha,q,
- (double) GetPixelAlpha(image,q),q);
- q+=GetPixelChannels(image);
- }
- if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
- status=MagickFalse;
- }
- image_view=DestroyCacheView(image_view);
- polygon_info=DestroyPolygonThreadSet(polygon_info);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-polygon");
- return(status);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % D r a w P r i m i t i v e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawPrimitive() draws a primitive (line, rectangle, ellipse) on the image.
- %
- % The format of the DrawPrimitive method is:
- %
- % MagickBooleanType DrawPrimitive(Image *image,const DrawInfo *draw_info,
- % PrimitiveInfo *primitive_info,ExceptionInfo *exception)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
- %
- % o exception: return any errors or warnings in this structure.
- %
- */
- static inline double ConstrainCoordinate(double x)
- {
- if (x < (double) -SSIZE_MAX)
- return((double) -SSIZE_MAX);
- if (x > (double) SSIZE_MAX)
- return((double) SSIZE_MAX);
- return(x);
- }
- static void LogPrimitiveInfo(const PrimitiveInfo *primitive_info)
- {
- const char
- *methods[] =
- {
- "point",
- "replace",
- "floodfill",
- "filltoborder",
- "reset",
- "?"
- };
- PointInfo
- p,
- point,
- q;
- register ssize_t
- i,
- x;
- ssize_t
- coordinates,
- y;
- x=(ssize_t) ceil(primitive_info->point.x-0.5);
- y=(ssize_t) ceil(primitive_info->point.y-0.5);
- switch (primitive_info->primitive)
- {
- case AlphaPrimitive:
- {
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- "AlphaPrimitive %.20g,%.20g %s",(double) x,(double) y,
- methods[primitive_info->method]);
- return;
- }
- case ColorPrimitive:
- {
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- "ColorPrimitive %.20g,%.20g %s",(double) x,(double) y,
- methods[primitive_info->method]);
- return;
- }
- case ImagePrimitive:
- {
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- "ImagePrimitive %.20g,%.20g",(double) x,(double) y);
- return;
- }
- case PointPrimitive:
- {
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- "PointPrimitive %.20g,%.20g %s",(double) x,(double) y,
- methods[primitive_info->method]);
- return;
- }
- case TextPrimitive:
- {
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- "TextPrimitive %.20g,%.20g",(double) x,(double) y);
- return;
- }
- default:
- break;
- }
- coordinates=0;
- p=primitive_info[0].point;
- q.x=(-1.0);
- q.y=(-1.0);
- for (i=0; primitive_info[i].primitive != UndefinedPrimitive; i++)
- {
- point=primitive_info[i].point;
- if (coordinates <= 0)
- {
- coordinates=(ssize_t) primitive_info[i].coordinates;
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " begin open (%.20g)",(double) coordinates);
- p=point;
- }
- point=primitive_info[i].point;
- if ((fabs(q.x-point.x) >= MagickEpsilon) ||
- (fabs(q.y-point.y) >= MagickEpsilon))
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " %.20g: %.18g,%.18g",(double) coordinates,point.x,point.y);
- else
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " %.20g: %g %g (duplicate)",(double) coordinates,point.x,point.y);
- q=point;
- coordinates--;
- if (coordinates > 0)
- continue;
- if ((fabs(p.x-point.x) >= MagickEpsilon) ||
- (fabs(p.y-point.y) >= MagickEpsilon))
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," end last (%.20g)",
- (double) coordinates);
- else
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," end open (%.20g)",
- (double) coordinates);
- }
- }
- MagickExport MagickBooleanType DrawPrimitive(Image *image,
- const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
- ExceptionInfo *exception)
- {
- CacheView
- *image_view;
- MagickStatusType
- status;
- register ssize_t
- i,
- x;
- ssize_t
- y;
- if (image->debug != MagickFalse)
- {
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " begin draw-primitive");
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " affine: %g,%g,%g,%g,%g,%g",draw_info->affine.sx,
- draw_info->affine.rx,draw_info->affine.ry,draw_info->affine.sy,
- draw_info->affine.tx,draw_info->affine.ty);
- }
- status=MagickTrue;
- if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
- ((IsPixelInfoGray(&draw_info->fill) == MagickFalse) ||
- (IsPixelInfoGray(&draw_info->stroke) == MagickFalse)))
- status=SetImageColorspace(image,sRGBColorspace,exception);
- if (draw_info->compliance == SVGCompliance)
- {
- status&=SetImageMask(image,WritePixelMask,draw_info->clipping_mask,
- exception);
- status&=SetImageMask(image,CompositePixelMask,draw_info->composite_mask,
- exception);
- }
- x=(ssize_t) ceil(ConstrainCoordinate(primitive_info->point.x-0.5));
- y=(ssize_t) ceil(ConstrainCoordinate(primitive_info->point.y-0.5));
- image_view=AcquireAuthenticCacheView(image,exception);
- switch (primitive_info->primitive)
- {
- case AlphaPrimitive:
- {
- if (image->alpha_trait == UndefinedPixelTrait)
- (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
- switch (primitive_info->method)
- {
- case PointMethod:
- default:
- {
- PixelInfo
- pixel;
- register Quantum
- *q;
- q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
- if (q == (Quantum *) NULL)
- break;
- GetFillColor(draw_info,x,y,&pixel,exception);
- SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
- (void) SyncCacheViewAuthenticPixels(image_view,exception);
- break;
- }
- case ReplaceMethod:
- {
- MagickBooleanType
- sync;
- PixelInfo
- pixel,
- target;
- (void) GetOneCacheViewVirtualPixelInfo(image_view,x,y,&target,
- exception);
- GetPixelInfo(image,&pixel);
- for (y=0; y < (ssize_t) image->rows; y++)
- {
- register Quantum
- *magick_restrict q;
- q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
- exception);
- if (q == (Quantum *) NULL)
- break;
- for (x=0; x < (ssize_t) image->columns; x++)
- {
- GetPixelInfoPixel(image,q,&pixel);
- if (IsFuzzyEquivalencePixelInfo(&pixel,&target) == MagickFalse)
- {
- q+=GetPixelChannels(image);
- continue;
- }
- GetFillColor(draw_info,x,y,&pixel,exception);
- SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
- q+=GetPixelChannels(image);
- }
- sync=SyncCacheViewAuthenticPixels(image_view,exception);
- if (sync == MagickFalse)
- break;
- }
- break;
- }
- case FloodfillMethod:
- case FillToBorderMethod:
- {
- ChannelType
- channel_mask;
- PixelInfo
- target;
- (void) GetOneVirtualPixelInfo(image,TileVirtualPixelMethod,x,y,
- &target,exception);
- if (primitive_info->method == FillToBorderMethod)
- {
- target.red=(double) draw_info->border_color.red;
- target.green=(double) draw_info->border_color.green;
- target.blue=(double) draw_info->border_color.blue;
- }
- channel_mask=SetImageChannelMask(image,AlphaChannel);
- status&=FloodfillPaintImage(image,draw_info,&target,x,y,
- primitive_info->method == FloodfillMethod ? MagickFalse :
- MagickTrue,exception);
- (void) SetImageChannelMask(image,channel_mask);
- break;
- }
- case ResetMethod:
- {
- MagickBooleanType
- sync;
- PixelInfo
- pixel;
- for (y=0; y < (ssize_t) image->rows; y++)
- {
- register Quantum
- *magick_restrict q;
- q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
- exception);
- if (q == (Quantum *) NULL)
- break;
- for (x=0; x < (ssize_t) image->columns; x++)
- {
- GetFillColor(draw_info,x,y,&pixel,exception);
- SetPixelAlpha(image,ClampToQuantum(pixel.alpha),q);
- q+=GetPixelChannels(image);
- }
- sync=SyncCacheViewAuthenticPixels(image_view,exception);
- if (sync == MagickFalse)
- break;
- }
- break;
- }
- }
- break;
- }
- case ColorPrimitive:
- {
- switch (primitive_info->method)
- {
- case PointMethod:
- default:
- {
- PixelInfo
- pixel;
- register Quantum
- *q;
- q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
- if (q == (Quantum *) NULL)
- break;
- GetPixelInfo(image,&pixel);
- GetFillColor(draw_info,x,y,&pixel,exception);
- SetPixelViaPixelInfo(image,&pixel,q);
- (void) SyncCacheViewAuthenticPixels(image_view,exception);
- break;
- }
- case ReplaceMethod:
- {
- MagickBooleanType
- sync;
- PixelInfo
- pixel,
- target;
- (void) GetOneCacheViewVirtualPixelInfo(image_view,x,y,&target,
- exception);
- for (y=0; y < (ssize_t) image->rows; y++)
- {
- register Quantum
- *magick_restrict q;
- q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
- exception);
- if (q == (Quantum *) NULL)
- break;
- for (x=0; x < (ssize_t) image->columns; x++)
- {
- GetPixelInfoPixel(image,q,&pixel);
- if (IsFuzzyEquivalencePixelInfo(&pixel,&target) == MagickFalse)
- {
- q+=GetPixelChannels(image);
- continue;
- }
- GetFillColor(draw_info,x,y,&pixel,exception);
- SetPixelViaPixelInfo(image,&pixel,q);
- q+=GetPixelChannels(image);
- }
- sync=SyncCacheViewAuthenticPixels(image_view,exception);
- if (sync == MagickFalse)
- break;
- }
- break;
- }
- case FloodfillMethod:
- case FillToBorderMethod:
- {
- PixelInfo
- target;
- (void) GetOneVirtualPixelInfo(image,TileVirtualPixelMethod,x,y,
- &target,exception);
- if (primitive_info->method == FillToBorderMethod)
- {
- target.red=(double) draw_info->border_color.red;
- target.green=(double) draw_info->border_color.green;
- target.blue=(double) draw_info->border_color.blue;
- }
- status&=FloodfillPaintImage(image,draw_info,&target,x,y,
- primitive_info->method == FloodfillMethod ? MagickFalse :
- MagickTrue,exception);
- break;
- }
- case ResetMethod:
- {
- MagickBooleanType
- sync;
- PixelInfo
- pixel;
- GetPixelInfo(image,&pixel);
- for (y=0; y < (ssize_t) image->rows; y++)
- {
- register Quantum
- *magick_restrict q;
- q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,
- exception);
- if (q == (Quantum *) NULL)
- break;
- for (x=0; x < (ssize_t) image->columns; x++)
- {
- GetFillColor(draw_info,x,y,&pixel,exception);
- SetPixelViaPixelInfo(image,&pixel,q);
- q+=GetPixelChannels(image);
- }
- sync=SyncCacheViewAuthenticPixels(image_view,exception);
- if (sync == MagickFalse)
- break;
- }
- break;
- }
- }
- break;
- }
- case ImagePrimitive:
- {
- AffineMatrix
- affine;
- char
- composite_geometry[MagickPathExtent];
- Image
- *composite_image,
- *composite_images;
- ImageInfo
- *clone_info;
- RectangleInfo
- geometry;
- ssize_t
- x1,
- y1;
- if (primitive_info->text == (char *) NULL)
- break;
- clone_info=AcquireImageInfo();
- if (LocaleNCompare(primitive_info->text,"data:",5) == 0)
- composite_images=ReadInlineImage(clone_info,primitive_info->text,
- exception);
- else
- {
- (void) CopyMagickString(clone_info->filename,primitive_info->text,
- MagickPathExtent);
- composite_images=ReadImage(clone_info,exception);
- }
- clone_info=DestroyImageInfo(clone_info);
- if (composite_images == (Image *) NULL)
- {
- status=0;
- break;
- }
- composite_image=RemoveFirstImageFromList(&composite_images);
- composite_images=DestroyImageList(composite_images);
- (void) SetImageProgressMonitor(composite_image,(MagickProgressMonitor)
- NULL,(void *) NULL);
- x1=(ssize_t) ceil(primitive_info[1].point.x-0.5);
- y1=(ssize_t) ceil(primitive_info[1].point.y-0.5);
- if (((x1 != 0L) && (x1 != (ssize_t) composite_image->columns)) ||
- ((y1 != 0L) && (y1 != (ssize_t) composite_image->rows)))
- {
- /*
- Resize image.
- */
- (void) FormatLocaleString(composite_geometry,MagickPathExtent,
- "%gx%g!",primitive_info[1].point.x,primitive_info[1].point.y);
- composite_image->filter=image->filter;
- (void) TransformImage(&composite_image,(char *) NULL,
- composite_geometry,exception);
- }
- if (composite_image->alpha_trait == UndefinedPixelTrait)
- (void) SetImageAlphaChannel(composite_image,OpaqueAlphaChannel,
- exception);
- if (draw_info->alpha != OpaqueAlpha)
- (void) SetImageAlpha(composite_image,draw_info->alpha,exception);
- SetGeometry(image,&geometry);
- image->gravity=draw_info->gravity;
- geometry.x=x;
- geometry.y=y;
- (void) FormatLocaleString(composite_geometry,MagickPathExtent,
- "%.20gx%.20g%+.20g%+.20g",(double) composite_image->columns,(double)
- composite_image->rows,(double) geometry.x,(double) geometry.y);
- (void) ParseGravityGeometry(image,composite_geometry,&geometry,exception);
- affine=draw_info->affine;
- affine.tx=(double) geometry.x;
- affine.ty=(double) geometry.y;
- composite_image->interpolate=image->interpolate;
- if ((draw_info->compose == OverCompositeOp) ||
- (draw_info->compose == SrcOverCompositeOp))
- (void) DrawAffineImage(image,composite_image,&affine,exception);
- else
- (void) CompositeImage(image,composite_image,draw_info->compose,
- MagickTrue,geometry.x,geometry.y,exception);
- composite_image=DestroyImage(composite_image);
- break;
- }
- case PointPrimitive:
- {
- PixelInfo
- fill_color;
- register Quantum
- *q;
- if ((y < 0) || (y >= (ssize_t) image->rows))
- break;
- if ((x < 0) || (x >= (ssize_t) image->columns))
- break;
- q=GetCacheViewAuthenticPixels(image_view,x,y,1,1,exception);
- if (q == (Quantum *) NULL)
- break;
- GetFillColor(draw_info,x,y,&fill_color,exception);
- CompositePixelOver(image,&fill_color,(double) fill_color.alpha,q,
- (double) GetPixelAlpha(image,q),q);
- (void) SyncCacheViewAuthenticPixels(image_view,exception);
- break;
- }
- case TextPrimitive:
- {
- char
- geometry[MagickPathExtent];
- DrawInfo
- *clone_info;
- if (primitive_info->text == (char *) NULL)
- break;
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- (void) CloneString(&clone_info->text,primitive_info->text);
- (void) FormatLocaleString(geometry,MagickPathExtent,"%+f%+f",
- primitive_info->point.x,primitive_info->point.y);
- (void) CloneString(&clone_info->geometry,geometry);
- status&=AnnotateImage(image,clone_info,exception);
- clone_info=DestroyDrawInfo(clone_info);
- break;
- }
- default:
- {
- double
- mid,
- scale;
- DrawInfo
- *clone_info;
- if (IsEventLogging() != MagickFalse)
- LogPrimitiveInfo(primitive_info);
- scale=ExpandAffine(&draw_info->affine);
- if ((draw_info->dash_pattern != (double *) NULL) &&
- (fabs(draw_info->dash_pattern[0]) >= MagickEpsilon) &&
- (fabs(scale*draw_info->stroke_width) >= MagickEpsilon) &&
- (draw_info->stroke.alpha != (Quantum) TransparentAlpha))
- {
- /*
- Draw dash polygon.
- */
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- clone_info->stroke_width=0.0;
- clone_info->stroke.alpha=(MagickRealType) TransparentAlpha;
- status&=DrawPolygonPrimitive(image,clone_info,primitive_info,
- exception);
- clone_info=DestroyDrawInfo(clone_info);
- status=DrawDashPolygon(draw_info,primitive_info,image,exception);
- break;
- }
- mid=ExpandAffine(&draw_info->affine)*SaneStrokeWidth(image,draw_info)/2.0;
- if ((mid > 1.0) &&
- ((draw_info->stroke.alpha != (Quantum) TransparentAlpha) ||
- (draw_info->stroke_pattern != (Image *) NULL)))
- {
- double
- x,
- y;
- MagickBooleanType
- closed_path;
- /*
- Draw strokes while respecting line cap/join attributes.
- */
- closed_path=primitive_info[0].closed_subpath;
- i=(ssize_t) primitive_info[0].coordinates;
- x=fabs(primitive_info[i-1].point.x-primitive_info[0].point.x);
- y=fabs(primitive_info[i-1].point.y-primitive_info[0].point.y);
- if ((x < MagickEpsilon) && (y < MagickEpsilon))
- closed_path=MagickTrue;
- if ((((draw_info->linecap == RoundCap) ||
- (closed_path != MagickFalse)) &&
- (draw_info->linejoin == RoundJoin)) ||
- (primitive_info[i].primitive != UndefinedPrimitive))
- {
- status=DrawPolygonPrimitive(image,draw_info,primitive_info,
- exception);
- break;
- }
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- clone_info->stroke_width=0.0;
- clone_info->stroke.alpha=(MagickRealType) TransparentAlpha;
- status&=DrawPolygonPrimitive(image,clone_info,primitive_info,
- exception);
- clone_info=DestroyDrawInfo(clone_info);
- status&=DrawStrokePolygon(image,draw_info,primitive_info,exception);
- break;
- }
- status&=DrawPolygonPrimitive(image,draw_info,primitive_info,exception);
- break;
- }
- }
- image_view=DestroyCacheView(image_view);
- if (draw_info->compliance == SVGCompliance)
- {
- status&=SetImageMask(image,WritePixelMask,(Image *) NULL,exception);
- status&=SetImageMask(image,CompositePixelMask,(Image *) NULL,exception);
- }
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule()," end draw-primitive");
- return(status != 0 ? MagickTrue : MagickFalse);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + D r a w S t r o k e P o l y g o n %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % DrawStrokePolygon() draws a stroked polygon (line, rectangle, ellipse) on
- % the image while respecting the line cap and join attributes.
- %
- % The format of the DrawStrokePolygon method is:
- %
- % MagickBooleanType DrawStrokePolygon(Image *image,
- % const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
- %
- % A description of each parameter follows:
- %
- % o image: the image.
- %
- % o draw_info: the draw info.
- %
- % o primitive_info: Specifies a pointer to a PrimitiveInfo structure.
- %
- %
- */
- static MagickBooleanType DrawRoundLinecap(Image *image,
- const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
- ExceptionInfo *exception)
- {
- PrimitiveInfo
- linecap[5];
- register ssize_t
- i;
- for (i=0; i < 4; i++)
- linecap[i]=(*primitive_info);
- linecap[0].coordinates=4;
- linecap[1].point.x+=2.0*MagickEpsilon;
- linecap[2].point.x+=2.0*MagickEpsilon;
- linecap[2].point.y+=2.0*MagickEpsilon;
- linecap[3].point.y+=2.0*MagickEpsilon;
- linecap[4].primitive=UndefinedPrimitive;
- return(DrawPolygonPrimitive(image,draw_info,linecap,exception));
- }
- static MagickBooleanType DrawStrokePolygon(Image *image,
- const DrawInfo *draw_info,const PrimitiveInfo *primitive_info,
- ExceptionInfo *exception)
- {
- DrawInfo
- *clone_info;
- MagickBooleanType
- closed_path;
- MagickStatusType
- status;
- PrimitiveInfo
- *stroke_polygon;
- register const PrimitiveInfo
- *p,
- *q;
- /*
- Draw stroked polygon.
- */
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " begin draw-stroke-polygon");
- clone_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
- clone_info->fill=draw_info->stroke;
- if (clone_info->fill_pattern != (Image *) NULL)
- clone_info->fill_pattern=DestroyImage(clone_info->fill_pattern);
- if (clone_info->stroke_pattern != (Image *) NULL)
- clone_info->fill_pattern=CloneImage(clone_info->stroke_pattern,0,0,
- MagickTrue,exception);
- clone_info->stroke.alpha=(MagickRealType) TransparentAlpha;
- clone_info->stroke_width=0.0;
- clone_info->fill_rule=NonZeroRule;
- status=MagickTrue;
- for (p=primitive_info; p->primitive != UndefinedPrimitive; p+=p->coordinates)
- {
- if (p->coordinates == 1)
- continue;
- stroke_polygon=TraceStrokePolygon(image,draw_info,p);
- if (stroke_polygon == (PrimitiveInfo *) NULL)
- {
- status=0;
- stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
- break;
- }
- status&=DrawPolygonPrimitive(image,clone_info,stroke_polygon,exception);
- stroke_polygon=(PrimitiveInfo *) RelinquishMagickMemory(stroke_polygon);
- if (status == 0)
- break;
- q=p+p->coordinates-1;
- closed_path=p->closed_subpath;
- if ((draw_info->linecap == RoundCap) && (closed_path == MagickFalse))
- {
- status&=DrawRoundLinecap(image,draw_info,p,exception);
- status&=DrawRoundLinecap(image,draw_info,q,exception);
- }
- }
- clone_info=DestroyDrawInfo(clone_info);
- if (image->debug != MagickFalse)
- (void) LogMagickEvent(DrawEvent,GetMagickModule(),
- " end draw-stroke-polygon");
- return(status != 0 ? MagickTrue : MagickFalse);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % G e t A f f i n e M a t r i x %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % GetAffineMatrix() returns an AffineMatrix initialized to the identity
- % matrix.
- %
- % The format of the GetAffineMatrix method is:
- %
- % void GetAffineMatrix(AffineMatrix *affine_matrix)
- %
- % A description of each parameter follows:
- %
- % o affine_matrix: the affine matrix.
- %
- */
- MagickExport void GetAffineMatrix(AffineMatrix *affine_matrix)
- {
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
- assert(affine_matrix != (AffineMatrix *) NULL);
- (void) memset(affine_matrix,0,sizeof(*affine_matrix));
- affine_matrix->sx=1.0;
- affine_matrix->sy=1.0;
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + G e t D r a w I n f o %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % GetDrawInfo() initializes draw_info to default values from image_info.
- %
- % The format of the GetDrawInfo method is:
- %
- % void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
- %
- % A description of each parameter follows:
- %
- % o image_info: the image info..
- %
- % o draw_info: the draw info.
- %
- */
- MagickExport void GetDrawInfo(const ImageInfo *image_info,DrawInfo *draw_info)
- {
- char
- *next_token;
- const char
- *option;
- ExceptionInfo
- *exception;
- ImageInfo
- *clone_info;
- /*
- Initialize draw attributes.
- */
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
- assert(draw_info != (DrawInfo *) NULL);
- (void) memset(draw_info,0,sizeof(*draw_info));
- clone_info=CloneImageInfo(image_info);
- GetAffineMatrix(&draw_info->affine);
- exception=AcquireExceptionInfo();
- (void) QueryColorCompliance("#000F",AllCompliance,&draw_info->fill,
- exception);
- (void) QueryColorCompliance("#FFF0",AllCompliance,&draw_info->stroke,
- exception);
- draw_info->stroke_antialias=clone_info->antialias;
- draw_info->stroke_width=1.0;
- draw_info->fill_rule=EvenOddRule;
- draw_info->alpha=OpaqueAlpha;
- draw_info->fill_alpha=OpaqueAlpha;
- draw_info->stroke_alpha=OpaqueAlpha;
- draw_info->linecap=ButtCap;
- draw_info->linejoin=MiterJoin;
- draw_info->miterlimit=10;
- draw_info->decorate=NoDecoration;
- draw_info->pointsize=12.0;
- draw_info->undercolor.alpha=(MagickRealType) TransparentAlpha;
- draw_info->compose=OverCompositeOp;
- draw_info->render=MagickTrue;
- draw_info->clip_path=MagickFalse;
- draw_info->debug=IsEventLogging();
- if (clone_info->font != (char *) NULL)
- draw_info->font=AcquireString(clone_info->font);
- if (clone_info->density != (char *) NULL)
- draw_info->density=AcquireString(clone_info->density);
- draw_info->text_antialias=clone_info->antialias;
- if (fabs(clone_info->pointsize) >= MagickEpsilon)
- draw_info->pointsize=clone_info->pointsize;
- draw_info->border_color=clone_info->border_color;
- if (clone_info->server_name != (char *) NULL)
- draw_info->server_name=AcquireString(clone_info->server_name);
- option=GetImageOption(clone_info,"direction");
- if (option != (const char *) NULL)
- draw_info->direction=(DirectionType) ParseCommandOption(
- MagickDirectionOptions,MagickFalse,option);
- else
- draw_info->direction=UndefinedDirection;
- option=GetImageOption(clone_info,"encoding");
- if (option != (const char *) NULL)
- (void) CloneString(&draw_info->encoding,option);
- option=GetImageOption(clone_info,"family");
- if (option != (const char *) NULL)
- (void) CloneString(&draw_info->family,option);
- option=GetImageOption(clone_info,"fill");
- if (option != (const char *) NULL)
- (void) QueryColorCompliance(option,AllCompliance,&draw_info->fill,
- exception);
- option=GetImageOption(clone_info,"gravity");
- if (option != (const char *) NULL)
- draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
- MagickFalse,option);
- option=GetImageOption(clone_info,"interline-spacing");
- if (option != (const char *) NULL)
- draw_info->interline_spacing=StringToDouble(option,&next_token);
- option=GetImageOption(clone_info,"interword-spacing");
- if (option != (const char *) NULL)
- draw_info->interword_spacing=StringToDouble(option,&next_token);
- option=GetImageOption(clone_info,"kerning");
- if (option != (const char *) NULL)
- draw_info->kerning=StringToDouble(option,&next_token);
- option=GetImageOption(clone_info,"stroke");
- if (option != (const char *) NULL)
- (void) QueryColorCompliance(option,AllCompliance,&draw_info->stroke,
- exception);
- option=GetImageOption(clone_info,"strokewidth");
- if (option != (const char *) NULL)
- draw_info->stroke_width=StringToDouble(option,&next_token);
- option=GetImageOption(clone_info,"style");
- if (option != (const char *) NULL)
- draw_info->style=(StyleType) ParseCommandOption(MagickStyleOptions,
- MagickFalse,option);
- option=GetImageOption(clone_info,"undercolor");
- if (option != (const char *) NULL)
- (void) QueryColorCompliance(option,AllCompliance,&draw_info->undercolor,
- exception);
- option=GetImageOption(clone_info,"weight");
- if (option != (const char *) NULL)
- {
- ssize_t
- weight;
- weight=ParseCommandOption(MagickWeightOptions,MagickFalse,option);
- if (weight == -1)
- weight=(ssize_t) StringToUnsignedLong(option);
- draw_info->weight=(size_t) weight;
- }
- exception=DestroyExceptionInfo(exception);
- draw_info->signature=MagickCoreSignature;
- clone_info=DestroyImageInfo(clone_info);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + P e r m u t a t e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % Permutate() returns the permuation of the (n,k).
- %
- % The format of the Permutate method is:
- %
- % void Permutate(ssize_t n,ssize_t k)
- %
- % A description of each parameter follows:
- %
- % o n:
- %
- % o k:
- %
- %
- */
- static inline double Permutate(const ssize_t n,const ssize_t k)
- {
- double
- r;
- register ssize_t
- i;
- r=1.0;
- for (i=k+1; i <= n; i++)
- r*=i;
- for (i=1; i <= (n-k); i++)
- r/=i;
- return(r);
- }
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- + T r a c e P r i m i t i v e %
- % %
- % %
- % %
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- %
- % TracePrimitive is a collection of methods for generating graphic
- % primitives such as arcs, ellipses, paths, etc.
- %
- */
- static MagickBooleanType TraceArc(MVGInfo *mvg_info,const PointInfo start,
- const PointInfo end,const PointInfo degrees)
- {
- PointInfo
- center,
- radius;
- center.x=0.5*(end.x+start.x);
- center.y=0.5*(end.y+start.y);
- radius.x=fabs(center.x-start.x);
- radius.y=fabs(center.y-start.y);
- return(TraceEllipse(mvg_info,center,radius,degrees));
- }
- static MagickBooleanType TraceArcPath(MVGInfo *mvg_info,const PointInfo start,
- const PointInfo end,const PointInfo arc,const double angle,
- const MagickBooleanType large_arc,const MagickBooleanType sweep)
- {
- double
- alpha,
- beta,
- delta,
- factor,
- gamma,
- theta;
- MagickStatusType
- status;
- PointInfo
- center,
- points[3],
- radii;
- register double
- cosine,
- sine;
- PrimitiveInfo
- *primitive_info;
- register PrimitiveInfo
- *p;
- register ssize_t
- i;
- size_t
- arc_segments;
- ssize_t
- offset;
- offset=mvg_info->offset;
- primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
- primitive_info->coordinates=0;
- if ((fabs(start.x-end.x) < MagickEpsilon) &&
- (fabs(start.y-end.y) < MagickEpsilon))
- return(TracePoint(primitive_info,end));
- radii.x=fabs(arc.x);
- radii.y=fabs(arc.y);
- if ((fabs(radii.x) < MagickEpsilon) || (fabs(radii.y) < MagickEpsilon))
- return(TraceLine(primitive_info,start,end));
- cosine=cos(DegreesToRadians(fmod((double) angle,360.0)));
- sine=sin(DegreesToRadians(fmod((double) angle,360.0)));
- center.x=(double) (cosine*(end.x-start.x)/2+sine*(end.y-start.y)/2);
- center.y=(double) (cosine*(end.y-start.y)/2-sine*(end.x-start.x)/2);
- delta=(center.x*center.x)/(radii.x*radii.x)+(center.y*center.y)/
- (radii.y*radii.y);
- if (delta < MagickEpsilon)
- return(TraceLine(primitive_info,start,end));
- if (delta > 1.0)
- {
- radii.x*=sqrt((double) delta);
- radii.y*=sqrt((double) delta);
- }
- points[0].x=(double) (cosine*start.x/radii.x+sine*start.y/radii.x);
- points[0].y=(double) (cosine*start.y/radii.y-sine*start.x/radii.y);
- points[1].x=(double) (cosine*end.x/radii.x+sine*end.y/radii.x);
- points[1].y=(double) (cosine*end.y/radii.y-sine*end.x/radii.y);
- alpha=points[1].x-points[0].x;
- beta=points[1].y-points[0].y;
- factor=PerceptibleReciprocal(alpha*alpha+beta*beta)-0.25;
- if (factor <= 0.0)
- factor=0.0;
- else
- {
- factor=sqrt((double) factor);
- if (sweep == large_arc)
- factor=(-factor);
- }
- center.x=(double) ((points[0].x+points[1].x)/2-factor*beta);
- center.y=(double) ((points[0].y+points[1].y)/2+factor*alpha);
- alpha=atan2(points[0].y-center.y,points[0].x-center.x);
- theta=atan2(points[1].y-center.y,points[1].x-center.x)-alpha;
- if ((theta < 0.0) && (sweep != MagickFalse))
- theta+=2.0*MagickPI;
- else
- if ((theta > 0.0) && (sweep == MagickFalse))
- theta-=2.0*MagickPI;
- arc_segments=(size_t) ceil(fabs((double) (theta/(0.5*MagickPI+
- MagickEpsilon))));
- status=MagickTrue;
- p=primitive_info;
- for (i=0; i < (ssize_t) arc_segments; i++)
- {
- beta=0.5*((alpha+(i+1)*theta/arc_segments)-(alpha+i*theta/arc_segments));
- gamma=(8.0/3.0)*sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))*
- sin(fmod((double) (0.5*beta),DegreesToRadians(360.0)))/
- sin(fmod((double) beta,DegreesToRadians(360.0)));
- points[0].x=(double) (center.x+cos(fmod((double) (alpha+(double) i*theta/
- arc_segments),DegreesToRadians(360.0)))-gamma*sin(fmod((double) (alpha+
- (double) i*theta/arc_segments),DegreesToRadians(360.0))));
- points[0].y=(double) (center.y+sin(fmod((double) (alpha+(double) i*theta/
- arc_segments),DegreesToRadians(360.0)))+gamma*cos(fmod((double) (alpha+
- (double) i*theta/arc_segments),DegreesToRadians(360.0))));
- points[2].x=(double) (center.x+cos(fmod((double) (alpha+(double) (i+1)*
- theta/arc_segments),DegreesToRadians(360.0))));
- points[2].y=(double) (center.y+sin(fmod((double) (alpha+(double) (i+1)*
- theta/arc_segments),DegreesToRadians(360.0))));
- points[1].x=(double) (points[2].x+gamma*sin(fmod((double) (alpha+(double)
- (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
- points[1].y=(double) (points[2].y-gamma*cos(fmod((double) (alpha+(double)
- (i+1)*theta/arc_segments),DegreesToRadians(360.0))));
- p->point.x=(p == primitive_info) ? start.x : (p-1)->point.x;
- p->point.y=(p == primitive_info) ? start.y : (p-1)->point.y;
- (p+1)->point.x=(double) (cosine*radii.x*points[0].x-sine*radii.y*
- points[0].y);
- (p+1)->point.y=(double) (sine*radii.x*points[0].x+cosine*radii.y*
- points[0].y);
- (p+2)->point.x=(double) (cosine*radii.x*points[1].x-sine*radii.y*
- points[1].y);
- (p+2)->point.y=(double) (sine*radii.x*points[1].x+cosine*radii.y*
- points[1].y);
- (p+3)->point.x=(double) (cosine*radii.x*points[2].x-sine*radii.y*
- points[2].y);
- (p+3)->point.y=(double) (sine*radii.x*points[2].x+cosine*radii.y*
- points[2].y);
- if (i == (ssize_t) (arc_segments-1))
- (p+3)->point=end;
- status&=TraceBezier(mvg_info,4);
- p=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=p->coordinates;
- p+=p->coordinates;
- }
- mvg_info->offset=offset;
- primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
- primitive_info->coordinates=(size_t) (p-primitive_info);
- primitive_info->closed_subpath=MagickFalse;
- for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
- {
- p->primitive=primitive_info->primitive;
- p--;
- }
- return(status == 0 ? MagickFalse : MagickTrue);
- }
- static MagickBooleanType TraceBezier(MVGInfo *mvg_info,
- const size_t number_coordinates)
- {
- double
- alpha,
- *coefficients,
- weight;
- PointInfo
- end,
- point,
- *points;
- PrimitiveInfo
- *primitive_info;
- register PrimitiveInfo
- *p;
- register ssize_t
- i,
- j;
- size_t
- control_points,
- quantum;
- /*
- Allocate coefficients.
- */
- primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
- quantum=number_coordinates;
- for (i=0; i < (ssize_t) number_coordinates; i++)
- {
- for (j=i+1; j < (ssize_t) number_coordinates; j++)
- {
- alpha=fabs(primitive_info[j].point.x-primitive_info[i].point.x);
- if (alpha > (double) quantum)
- quantum=(size_t) alpha;
- alpha=fabs(primitive_info[j].point.y-primitive_info[i].point.y);
- if (alpha > (double) quantum)
- quantum=(size_t) alpha;
- }
- }
- quantum=(size_t) MagickMin((double) quantum/number_coordinates,
- (double) BezierQuantum);
- control_points=quantum*number_coordinates;
- if (CheckPrimitiveExtent(mvg_info,control_points+1) == MagickFalse)
- return(MagickFalse);
- primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
- coefficients=(double *) AcquireQuantumMemory((size_t)
- number_coordinates,sizeof(*coefficients));
- points=(PointInfo *) AcquireQuantumMemory((size_t) control_points,
- sizeof(*points));
- if ((coefficients == (double *) NULL) || (points == (PointInfo *) NULL))
- ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
- /*
- Compute bezier points.
- */
- end=primitive_info[number_coordinates-1].point;
- for (i=0; i < (ssize_t) number_coordinates; i++)
- coefficients[i]=Permutate((ssize_t) number_coordinates-1,i);
- weight=0.0;
- for (i=0; i < (ssize_t) control_points; i++)
- {
- p=primitive_info;
- point.x=0.0;
- point.y=0.0;
- alpha=pow((double) (1.0-weight),(double) number_coordinates-1.0);
- for (j=0; j < (ssize_t) number_coordinates; j++)
- {
- point.x+=alpha*coefficients[j]*p->point.x;
- point.y+=alpha*coefficients[j]*p->point.y;
- alpha*=weight/(1.0-weight);
- p++;
- }
- points[i]=point;
- weight+=1.0/control_points;
- }
- /*
- Bezier curves are just short segmented polys.
- */
- p=primitive_info;
- for (i=0; i < (ssize_t) control_points; i++)
- {
- if (TracePoint(p,points[i]) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- }
- if (TracePoint(p,end) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- primitive_info->coordinates=(size_t) (p-primitive_info);
- primitive_info->closed_subpath=MagickFalse;
- for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
- {
- p->primitive=primitive_info->primitive;
- p--;
- }
- points=(PointInfo *) RelinquishMagickMemory(points);
- coefficients=(double *) RelinquishMagickMemory(coefficients);
- return(MagickTrue);
- }
- static MagickBooleanType TraceCircle(MVGInfo *mvg_info,const PointInfo start,
- const PointInfo end)
- {
- double
- alpha,
- beta,
- radius;
- PointInfo
- offset,
- degrees;
- alpha=end.x-start.x;
- beta=end.y-start.y;
- radius=hypot((double) alpha,(double) beta);
- offset.x=(double) radius;
- offset.y=(double) radius;
- degrees.x=0.0;
- degrees.y=360.0;
- return(TraceEllipse(mvg_info,start,offset,degrees));
- }
- static MagickBooleanType TraceEllipse(MVGInfo *mvg_info,const PointInfo center,
- const PointInfo radii,const PointInfo arc)
- {
- double
- coordinates,
- delta,
- step,
- x,
- y;
- PointInfo
- angle,
- point;
- PrimitiveInfo
- *primitive_info;
- register PrimitiveInfo
- *p;
- register ssize_t
- i;
- /*
- Ellipses are just short segmented polys.
- */
- primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
- primitive_info->coordinates=0;
- if ((fabs(radii.x) < MagickEpsilon) || (fabs(radii.y) < MagickEpsilon))
- return(MagickTrue);
- delta=2.0*PerceptibleReciprocal(MagickMax(radii.x,radii.y));
- step=MagickPI/8.0;
- if ((delta >= 0.0) && (delta < (MagickPI/8.0)))
- step=MagickPI/4.0/(MagickPI*PerceptibleReciprocal(delta)/2.0);
- angle.x=DegreesToRadians(arc.x);
- y=arc.y;
- while (y < arc.x)
- y+=360.0;
- angle.y=DegreesToRadians(y);
- coordinates=ceil((angle.y-angle.x)/step+1.0);
- if ((coordinates > (double) SSIZE_MAX) ||
- (coordinates > (double) GetMaxMemoryRequest()))
- {
- (void) ThrowMagickException(mvg_info->exception,GetMagickModule(),
- ResourceLimitError,"MemoryAllocationFailed","`%s'","");
- return(MagickFalse);
- }
- if (CheckPrimitiveExtent(mvg_info,(size_t) coordinates) == MagickFalse)
- return(MagickFalse);
- primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
- for (p=primitive_info; angle.x < angle.y; angle.x+=step)
- {
- point.x=cos(fmod(angle.x,DegreesToRadians(360.0)))*radii.x+center.x;
- point.y=sin(fmod(angle.x,DegreesToRadians(360.0)))*radii.y+center.y;
- if (TracePoint(p,point) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- }
- point.x=cos(fmod(angle.y,DegreesToRadians(360.0)))*radii.x+center.x;
- point.y=sin(fmod(angle.y,DegreesToRadians(360.0)))*radii.y+center.y;
- if (TracePoint(p,point) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- primitive_info->coordinates=(size_t) (p-primitive_info);
- primitive_info->closed_subpath=MagickFalse;
- x=fabs(primitive_info[0].point.x-
- primitive_info[primitive_info->coordinates-1].point.x);
- y=fabs(primitive_info[0].point.y-
- primitive_info[primitive_info->coordinates-1].point.y);
- if ((x < MagickEpsilon) && (y < MagickEpsilon))
- primitive_info->closed_subpath=MagickTrue;
- for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
- {
- p->primitive=primitive_info->primitive;
- p--;
- }
- return(MagickTrue);
- }
- static MagickBooleanType TraceLine(PrimitiveInfo *primitive_info,
- const PointInfo start,const PointInfo end)
- {
- if (TracePoint(primitive_info,start) == MagickFalse)
- return(MagickFalse);
- if ((fabs(start.x-end.x) < MagickEpsilon) &&
- (fabs(start.y-end.y) < MagickEpsilon))
- {
- primitive_info->primitive=PointPrimitive;
- primitive_info->coordinates=1;
- return(MagickTrue);
- }
- if (TracePoint(primitive_info+1,end) == MagickFalse)
- return(MagickFalse);
- (primitive_info+1)->primitive=primitive_info->primitive;
- primitive_info->coordinates=2;
- primitive_info->closed_subpath=MagickFalse;
- return(MagickTrue);
- }
- static size_t TracePath(MVGInfo *mvg_info,const char *path,
- ExceptionInfo *exception)
- {
- char
- *next_token,
- token[MagickPathExtent];
- const char
- *p;
- double
- x,
- y;
- int
- attribute,
- last_attribute;
- MagickBooleanType
- status;
- PointInfo
- end = {0.0, 0.0},
- points[4] = { {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0}, {0.0, 0.0} },
- point = {0.0, 0.0},
- start = {0.0, 0.0};
- PrimitiveInfo
- *primitive_info;
- PrimitiveType
- primitive_type;
- register PrimitiveInfo
- *q;
- register ssize_t
- i;
- size_t
- number_coordinates,
- z_count;
- ssize_t
- subpath_offset;
- subpath_offset=mvg_info->offset;
- primitive_info=(*mvg_info->primitive_info)+mvg_info->offset;
- status=MagickTrue;
- attribute=0;
- number_coordinates=0;
- z_count=0;
- primitive_type=primitive_info->primitive;
- q=primitive_info;
- for (p=path; *p != '\0'; )
- {
- if (status == MagickFalse)
- break;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == '\0')
- break;
- last_attribute=attribute;
- attribute=(int) (*p++);
- switch (attribute)
- {
- case 'a':
- case 'A':
- {
- double
- angle = 0.0;
- MagickBooleanType
- large_arc = MagickFalse,
- sweep = MagickFalse;
- PointInfo
- arc = {0.0, 0.0};
- /*
- Elliptical arc.
- */
- do
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- arc.x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- arc.y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- angle=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- large_arc=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- sweep=StringToLong(token) != 0 ? MagickTrue : MagickFalse;
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- end.x=(double) (attribute == (int) 'A' ? x : point.x+x);
- end.y=(double) (attribute == (int) 'A' ? y : point.y+y);
- if (TraceArcPath(mvg_info,point,end,arc,angle,large_arc,sweep) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- point=end;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 'c':
- case 'C':
- {
- /*
- Cubic Bézier curve.
- */
- do
- {
- points[0]=point;
- for (i=1; i < 4; i++)
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- end.x=(double) (attribute == (int) 'C' ? x : point.x+x);
- end.y=(double) (attribute == (int) 'C' ? y : point.y+y);
- points[i]=end;
- }
- for (i=0; i < 4; i++)
- (q+i)->point=points[i];
- if (TraceBezier(mvg_info,4) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- point=end;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 'H':
- case 'h':
- {
- do
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- point.x=(double) (attribute == (int) 'H' ? x: point.x+x);
- if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- if (TracePoint(q,point) == MagickFalse)
- return(0);
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 'l':
- case 'L':
- {
- /*
- Line to.
- */
- do
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- point.x=(double) (attribute == (int) 'L' ? x : point.x+x);
- point.y=(double) (attribute == (int) 'L' ? y : point.y+y);
- if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- if (TracePoint(q,point) == MagickFalse)
- return(0);
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 'M':
- case 'm':
- {
- /*
- Move to.
- */
- if (mvg_info->offset != subpath_offset)
- {
- primitive_info=(*mvg_info->primitive_info)+subpath_offset;
- primitive_info->coordinates=(size_t) (q-primitive_info);
- number_coordinates+=primitive_info->coordinates;
- primitive_info=q;
- subpath_offset=mvg_info->offset;
- }
- i=0;
- do
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- point.x=(double) (attribute == (int) 'M' ? x : point.x+x);
- point.y=(double) (attribute == (int) 'M' ? y : point.y+y);
- if (i == 0)
- start=point;
- i++;
- if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- if (TracePoint(q,point) == MagickFalse)
- return(0);
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 'q':
- case 'Q':
- {
- /*
- Quadratic Bézier curve.
- */
- do
- {
- points[0]=point;
- for (i=1; i < 3; i++)
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- if (*p == ',')
- p++;
- end.x=(double) (attribute == (int) 'Q' ? x : point.x+x);
- end.y=(double) (attribute == (int) 'Q' ? y : point.y+y);
- points[i]=end;
- }
- for (i=0; i < 3; i++)
- (q+i)->point=points[i];
- if (TraceBezier(mvg_info,3) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- point=end;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 's':
- case 'S':
- {
- /*
- Cubic Bézier curve.
- */
- do
- {
- points[0]=points[3];
- points[1].x=2.0*points[3].x-points[2].x;
- points[1].y=2.0*points[3].y-points[2].y;
- for (i=2; i < 4; i++)
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- if (*p == ',')
- p++;
- end.x=(double) (attribute == (int) 'S' ? x : point.x+x);
- end.y=(double) (attribute == (int) 'S' ? y : point.y+y);
- points[i]=end;
- }
- if (strchr("CcSs",last_attribute) == (char *) NULL)
- {
- points[0]=point;
- points[1]=point;
- }
- for (i=0; i < 4; i++)
- (q+i)->point=points[i];
- if (TraceBezier(mvg_info,4) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- point=end;
- last_attribute=attribute;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 't':
- case 'T':
- {
- /*
- Quadratic Bézier curve.
- */
- do
- {
- points[0]=points[2];
- points[1].x=2.0*points[2].x-points[1].x;
- points[1].y=2.0*points[2].y-points[1].y;
- for (i=2; i < 3; i++)
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- x=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- end.x=(double) (attribute == (int) 'T' ? x : point.x+x);
- end.y=(double) (attribute == (int) 'T' ? y : point.y+y);
- points[i]=end;
- }
- if (status == MagickFalse)
- break;
- if (strchr("QqTt",last_attribute) == (char *) NULL)
- {
- points[0]=point;
- points[1]=point;
- }
- for (i=0; i < 3; i++)
- (q+i)->point=points[i];
- if (TraceBezier(mvg_info,3) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- point=end;
- last_attribute=attribute;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 'v':
- case 'V':
- {
- /*
- Line to.
- */
- do
- {
- GetNextToken(p,&p,MagickPathExtent,token);
- if (*token == ',')
- GetNextToken(p,&p,MagickPathExtent,token);
- y=StringToDouble(token,&next_token);
- if (token == next_token)
- ThrowPointExpectedException(token,exception);
- point.y=(double) (attribute == (int) 'V' ? y : point.y+y);
- if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- if (TracePoint(q,point) == MagickFalse)
- return(0);
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- while (isspace((int) ((unsigned char) *p)) != 0)
- p++;
- if (*p == ',')
- p++;
- } while (IsPoint(p) != MagickFalse);
- break;
- }
- case 'z':
- case 'Z':
- {
- /*
- Close path.
- */
- point=start;
- if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
- return(0);
- q=(*mvg_info->primitive_info)+mvg_info->offset;
- if (TracePoint(q,point) == MagickFalse)
- return(0);
- mvg_info->offset+=q->coordinates;
- q+=q->coordinates;
- primitive_info=(*mvg_info->primitive_info)+subpath_offset;
- primitive_info->coordinates=(size_t) (q-primitive_info);
- primitive_info->closed_subpath=MagickTrue;
- number_coordinates+=primitive_info->coordinates;
- primitive_info=q;
- subpath_offset=mvg_info->offset;
- z_count++;
- break;
- }
- default:
- {
- ThrowPointExpectedException(token,exception);
- break;
- }
- }
- }
- if (status == MagickFalse)
- return(0);
- primitive_info=(*mvg_info->primitive_info)+subpath_offset;
- primitive_info->coordinates=(size_t) (q-primitive_info);
- number_coordinates+=primitive_info->coordinates;
- for (i=0; i < (ssize_t) number_coordinates; i++)
- {
- q--;
- q->primitive=primitive_type;
- if (z_count > 1)
- q->method=FillToBorderMethod;
- }
- q=primitive_info;
- return(number_coordinates);
- }
- static MagickBooleanType TraceRectangle(PrimitiveInfo *primitive_info,
- const PointInfo start,const PointInfo end)
- {
- PointInfo
- point;
- register PrimitiveInfo
- *p;
- register ssize_t
- i;
- p=primitive_info;
- if (TracePoint(p,start) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- point.x=start.x;
- point.y=end.y;
- if (TracePoint(p,point) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- if (TracePoint(p,end) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- point.x=end.x;
- point.y=start.y;
- if (TracePoint(p,point) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- if (TracePoint(p,start) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- primitive_info->coordinates=(size_t) (p-primitive_info);
- primitive_info->closed_subpath=MagickTrue;
- for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
- {
- p->primitive=primitive_info->primitive;
- p--;
- }
- return(MagickTrue);
- }
- static MagickBooleanType TraceRoundRectangle(MVGInfo *mvg_info,
- const PointInfo start,const PointInfo end,PointInfo arc)
- {
- PointInfo
- degrees,
- point,
- segment;
- PrimitiveInfo
- *primitive_info;
- register PrimitiveInfo
- *p;
- register ssize_t
- i;
- ssize_t
- offset;
- offset=mvg_info->offset;
- segment.x=fabs(end.x-start.x);
- segment.y=fabs(end.y-start.y);
- if ((segment.x < MagickEpsilon) || (segment.y < MagickEpsilon))
- {
- (*mvg_info->primitive_info+mvg_info->offset)->coordinates=0;
- return(MagickTrue);
- }
- if (arc.x > (0.5*segment.x))
- arc.x=0.5*segment.x;
- if (arc.y > (0.5*segment.y))
- arc.y=0.5*segment.y;
- point.x=start.x+segment.x-arc.x;
- point.y=start.y+arc.y;
- degrees.x=270.0;
- degrees.y=360.0;
- if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
- return(MagickFalse);
- p=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=p->coordinates;
- point.x=start.x+segment.x-arc.x;
- point.y=start.y+segment.y-arc.y;
- degrees.x=0.0;
- degrees.y=90.0;
- if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
- return(MagickFalse);
- p=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=p->coordinates;
- point.x=start.x+arc.x;
- point.y=start.y+segment.y-arc.y;
- degrees.x=90.0;
- degrees.y=180.0;
- if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
- return(MagickFalse);
- p=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=p->coordinates;
- point.x=start.x+arc.x;
- point.y=start.y+arc.y;
- degrees.x=180.0;
- degrees.y=270.0;
- if (TraceEllipse(mvg_info,point,arc,degrees) == MagickFalse)
- return(MagickFalse);
- p=(*mvg_info->primitive_info)+mvg_info->offset;
- mvg_info->offset+=p->coordinates;
- if (CheckPrimitiveExtent(mvg_info,PrimitiveExtentPad) == MagickFalse)
- return(MagickFalse);
- p=(*mvg_info->primitive_info)+mvg_info->offset;
- if (TracePoint(p,(*mvg_info->primitive_info+offset)->point) == MagickFalse)
- return(MagickFalse);
- p+=p->coordinates;
- mvg_info->offset=offset;
- primitive_info=(*mvg_info->primitive_info)+offset;
- primitive_info->coordinates=(size_t) (p-primitive_info);
- primitive_info->closed_subpath=MagickTrue;
- for (i=0; i < (ssize_t) primitive_info->coordinates; i++)
- {
- p->primitive=primitive_info->primitive;
- p--;
- }
- return(MagickTrue);
- }
- static MagickBooleanType TraceSquareLinecap(PrimitiveInfo *primitive_info,
- const size_t number_vertices,const double offset)
- {
- double
- distance;
- register double
- dx,
- dy;
- register ssize_t
- i;
- ssize_t
- j;
- dx=0.0;
- dy=0.0;
- for (i=1; i < (ssize_t) number_vertices; i++)
- {
- dx=primitive_info[0].point.x-primitive_info[i].point.x;
- dy=primitive_info[0].point.y-primitive_info[i].point.y;
- if ((fabs((double) dx) >= MagickEpsilon) ||
- (fabs((double) dy) >= MagickEpsilon))
- break;
- }
- if (i == (ssize_t) number_vertices)
- i=(ssize_t) number_vertices-1L;
- distance=hypot((double) dx,(double) dy);
- primitive_info[0].point.x=(double) (primitive_info[i].point.x+
- dx*(distance+offset)/distance);
- primitive_info[0].point.y=(double) (primitive_info[i].point.y+
- dy*(distance+offset)/distance);
- for (j=(ssize_t) number_vertices-2; j >= 0; j--)
- {
- dx=primitive_info[number_vertices-1].point.x-primitive_info[j].point.x;
- dy=primitive_info[number_vertices-1].point.y-primitive_info[j].point.y;
- if ((fabs((double) dx) >= MagickEpsilon) ||
- (fabs((double) dy) >= MagickEpsilon))
- break;
- }
- distance=hypot((double) dx,(double) dy);
- primitive_info[number_vertices-1].point.x=(double) (primitive_info[j].point.x+
- dx*(distance+offset)/distance);
- primitive_info[number_vertices-1].point.y=(double) (primitive_info[j].point.y+
- dy*(distance+offset)/distance);
- return(MagickTrue);
- }
- static PrimitiveInfo *TraceStrokePolygon(const Image *image,
- const DrawInfo *draw_info,const PrimitiveInfo *primitive_info)
- {
- #define CheckPathExtent(pad) \
- if ((ssize_t) (q+(pad)) >= (ssize_t) max_strokes) \
- { \
- if (~max_strokes < (pad)) \
- { \
- path_p=(PointInfo *) RelinquishMagickMemory(path_p); \
- path_q=(PointInfo *) RelinquishMagickMemory(path_q); \
- } \
- else \
- { \
- max_strokes+=(pad); \
- path_p=(PointInfo *) ResizeQuantumMemory(path_p,max_strokes, \
- sizeof(*path_p)); \
- path_q=(PointInfo *) ResizeQuantumMemory(path_q,max_strokes, \
- sizeof(*path_q)); \
- } \
- if ((path_p == (PointInfo *) NULL) || (path_q == (PointInfo *) NULL)) \
- { \
- if (path_p != (PointInfo *) NULL) \
- path_p=(PointInfo *) RelinquishMagickMemory(path_p); \
- if (path_q != (PointInfo *) NULL) \
- path_q=(PointInfo *) RelinquishMagickMemory(path_q); \
- polygon_primitive=(PrimitiveInfo *) \
- RelinquishMagickMemory(polygon_primitive); \
- return((PrimitiveInfo *) NULL); \
- } \
- }
- typedef struct _LineSegment
- {
- double
- p,
- q;
- } LineSegment;
- double
- delta_theta,
- dot_product,
- mid,
- miterlimit;
- LineSegment
- dx = {0,0},
- dy = {0,0},
- inverse_slope = {0,0},
- slope = {0,0},
- theta = {0,0};
- MagickBooleanType
- closed_path;
- PointInfo
- box_p[5],
- box_q[5],
- center,
- offset,
- *path_p,
- *path_q;
- PrimitiveInfo
- *polygon_primitive,
- *stroke_polygon;
- register ssize_t
- i;
- size_t
- arc_segments,
- max_strokes,
- number_vertices;
- ssize_t
- j,
- n,
- p,
- q;
- /*
- Allocate paths.
- */
- number_vertices=primitive_info->coordinates;
- max_strokes=2*number_vertices+6*BezierQuantum+360;
- polygon_primitive=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
- number_vertices+2UL,sizeof(*polygon_primitive));
- if (polygon_primitive == (PrimitiveInfo *) NULL)
- return((PrimitiveInfo *) NULL);
- (void) memcpy(polygon_primitive,primitive_info,(size_t) number_vertices*
- sizeof(*polygon_primitive));
- closed_path=primitive_info[0].closed_subpath;
- if (((draw_info->linejoin == RoundJoin) ||
- (draw_info->linejoin == MiterJoin)) && (closed_path != MagickFalse))
- {
- polygon_primitive[number_vertices]=primitive_info[1];
- number_vertices++;
- }
- polygon_primitive[number_vertices].primitive=UndefinedPrimitive;
- /*
- Compute the slope for the first line segment, p.
- */
- dx.p=0.0;
- dy.p=0.0;
- for (n=1; n < (ssize_t) number_vertices; n++)
- {
- dx.p=polygon_primitive[n].point.x-polygon_primitive[0].point.x;
- dy.p=polygon_primitive[n].point.y-polygon_primitive[0].point.y;
- if ((fabs(dx.p) >= MagickEpsilon) || (fabs(dy.p) >= MagickEpsilon))
- break;
- }
- if (n == (ssize_t) number_vertices)
- {
- if ((draw_info->linecap != RoundCap) || (closed_path != MagickFalse))
- {
- /*
- Zero length subpath.
- */
- stroke_polygon=(PrimitiveInfo *) AcquireCriticalMemory(
- sizeof(*stroke_polygon));
- stroke_polygon[0]=polygon_primitive[0];
- stroke_polygon[0].coordinates=0;
- polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
- polygon_primitive);
- return(stroke_polygon);
- }
- n=(ssize_t) number_vertices-1L;
- }
- path_p=(PointInfo *) AcquireQuantumMemory((size_t) max_strokes,
- sizeof(*path_p));
- if (path_p == (PointInfo *) NULL)
- {
- polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
- polygon_primitive);
- return((PrimitiveInfo *) NULL);
- }
- path_q=(PointInfo *) AcquireQuantumMemory((size_t) max_strokes,
- sizeof(*path_q));
- if (path_q == (PointInfo *) NULL)
- {
- path_p=(PointInfo *) RelinquishMagickMemory(path_p);
- polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(
- polygon_primitive);
- return((PrimitiveInfo *) NULL);
- }
- slope.p=0.0;
- inverse_slope.p=0.0;
- if (fabs(dx.p) < MagickEpsilon)
- {
- if (dx.p >= 0.0)
- slope.p=dy.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
- else
- slope.p=dy.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
- }
- else
- if (fabs(dy.p) < MagickEpsilon)
- {
- if (dy.p >= 0.0)
- inverse_slope.p=dx.p < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
- else
- inverse_slope.p=dx.p < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
- }
- else
- {
- slope.p=dy.p/dx.p;
- inverse_slope.p=(-1.0/slope.p);
- }
- mid=ExpandAffine(&draw_info->affine)*SaneStrokeWidth(image,draw_info)/2.0;
- miterlimit=(double) (draw_info->miterlimit*draw_info->miterlimit*mid*mid);
- if ((draw_info->linecap == SquareCap) && (closed_path == MagickFalse))
- (void) TraceSquareLinecap(polygon_primitive,number_vertices,mid);
- offset.x=sqrt((double) (mid*mid/(inverse_slope.p*inverse_slope.p+1.0)));
- offset.y=(double) (offset.x*inverse_slope.p);
- if ((dy.p*offset.x-dx.p*offset.y) > 0.0)
- {
- box_p[0].x=polygon_primitive[0].point.x-offset.x;
- box_p[0].y=polygon_primitive[0].point.y-offset.x*inverse_slope.p;
- box_p[1].x=polygon_primitive[n].point.x-offset.x;
- box_p[1].y=polygon_primitive[n].point.y-offset.x*inverse_slope.p;
- box_q[0].x=polygon_primitive[0].point.x+offset.x;
- box_q[0].y=polygon_primitive[0].point.y+offset.x*inverse_slope.p;
- box_q[1].x=polygon_primitive[n].point.x+offset.x;
- box_q[1].y=polygon_primitive[n].point.y+offset.x*inverse_slope.p;
- }
- else
- {
- box_p[0].x=polygon_primitive[0].point.x+offset.x;
- box_p[0].y=polygon_primitive[0].point.y+offset.y;
- box_p[1].x=polygon_primitive[n].point.x+offset.x;
- box_p[1].y=polygon_primitive[n].point.y+offset.y;
- box_q[0].x=polygon_primitive[0].point.x-offset.x;
- box_q[0].y=polygon_primitive[0].point.y-offset.y;
- box_q[1].x=polygon_primitive[n].point.x-offset.x;
- box_q[1].y=polygon_primitive[n].point.y-offset.y;
- }
- /*
- Create strokes for the line join attribute: bevel, miter, round.
- */
- p=0;
- q=0;
- path_q[p++]=box_q[0];
- path_p[q++]=box_p[0];
- for (i=(ssize_t) n+1; i < (ssize_t) number_vertices; i++)
- {
- /*
- Compute the slope for this line segment, q.
- */
- dx.q=polygon_primitive[i].point.x-polygon_primitive[n].point.x;
- dy.q=polygon_primitive[i].point.y-polygon_primitive[n].point.y;
- dot_product=dx.q*dx.q+dy.q*dy.q;
- if (dot_product < 0.25)
- continue;
- slope.q=0.0;
- inverse_slope.q=0.0;
- if (fabs(dx.q) < MagickEpsilon)
- {
- if (dx.q >= 0.0)
- slope.q=dy.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
- else
- slope.q=dy.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
- }
- else
- if (fabs(dy.q) < MagickEpsilon)
- {
- if (dy.q >= 0.0)
- inverse_slope.q=dx.q < 0.0 ? -1.0/MagickEpsilon : 1.0/MagickEpsilon;
- else
- inverse_slope.q=dx.q < 0.0 ? 1.0/MagickEpsilon : -1.0/MagickEpsilon;
- }
- else
- {
- slope.q=dy.q/dx.q;
- inverse_slope.q=(-1.0/slope.q);
- }
- offset.x=sqrt((double) (mid*mid/(inverse_slope.q*inverse_slope.q+1.0)));
- offset.y=(double) (offset.x*inverse_slope.q);
- dot_product=dy.q*offset.x-dx.q*offset.y;
- if (dot_product > 0.0)
- {
- box_p[2].x=polygon_primitive[n].point.x-offset.x;
- box_p[2].y=polygon_primitive[n].point.y-offset.y;
- box_p[3].x=polygon_primitive[i].point.x-offset.x;
- box_p[3].y=polygon_primitive[i].point.y-offset.y;
- box_q[2].x=polygon_primitive[n].point.x+offset.x;
- box_q[2].y=polygon_primitive[n].point.y+offset.y;
- box_q[3].x=polygon_primitive[i].point.x+offset.x;
- box_q[3].y=polygon_primitive[i].point.y+offset.y;
- }
- else
- {
- box_p[2].x=polygon_primitive[n].point.x+offset.x;
- box_p[2].y=polygon_primitive[n].point.y+offset.y;
- box_p[3].x=polygon_primitive[i].point.x+offset.x;
- box_p[3].y=polygon_primitive[i].point.y+offset.y;
- box_q[2].x=polygon_primitive[n].point.x-offset.x;
- box_q[2].y=polygon_primitive[n].point.y-offset.y;
- box_q[3].x=polygon_primitive[i].point.x-offset.x;
- box_q[3].y=polygon_primitive[i].point.y-offset.y;
- }
- if (fabs((double) (slope.p-slope.q)) < MagickEpsilon)
- {
- box_p[4]=box_p[1];
- box_q[4]=box_q[1];
- }
- else
- {
- box_p[4].x=(double) ((slope.p*box_p[0].x-box_p[0].y-slope.q*box_p[3].x+
- box_p[3].y)/(slope.p-slope.q));
- box_p[4].y=(double) (slope.p*(box_p[4].x-box_p[0].x)+box_p[0].y);
- box_q[4].x=(double) ((slope.p*box_q[0].x-box_q[0].y-slope.q*box_q[3].x+
- box_q[3].y)/(slope.p-slope.q));
- box_q[4].y=(double) (slope.p*(box_q[4].x-box_q[0].x)+box_q[0].y);
- }
- CheckPathExtent(6*BezierQuantum+360);
- dot_product=dx.q*dy.p-dx.p*dy.q;
- if (dot_product <= 0.0)
- switch (draw_info->linejoin)
- {
- case BevelJoin:
- {
- path_q[q++]=box_q[1];
- path_q[q++]=box_q[2];
- dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
- (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
- if (dot_product <= miterlimit)
- path_p[p++]=box_p[4];
- else
- {
- path_p[p++]=box_p[1];
- path_p[p++]=box_p[2];
- }
- break;
- }
- case MiterJoin:
- {
- dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
- (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
- if (dot_product <= miterlimit)
- {
- path_q[q++]=box_q[4];
- path_p[p++]=box_p[4];
- }
- else
- {
- path_q[q++]=box_q[1];
- path_q[q++]=box_q[2];
- path_p[p++]=box_p[1];
- path_p[p++]=box_p[2];
- }
- break;
- }
- case RoundJoin:
- {
- dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
- (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
- if (dot_product <= miterlimit)
- path_p[p++]=box_p[4];
- else
- {
- path_p[p++]=box_p[1];
- path_p[p++]=box_p[2];
- }
- center=polygon_primitive[n].point;
- theta.p=atan2(box_q[1].y-center.y,box_q[1].x-center.x);
- theta.q=atan2(box_q[2].y-center.y,box_q[2].x-center.x);
- if (theta.q < theta.p)
- theta.q+=2.0*MagickPI;
- arc_segments=(size_t) ceil((double) ((theta.q-theta.p)/
- (2.0*sqrt((double) (1.0/mid)))));
- CheckPathExtent(arc_segments+6*BezierQuantum+360);
- path_q[q].x=box_q[1].x;
- path_q[q].y=box_q[1].y;
- q++;
- for (j=1; j < (ssize_t) arc_segments; j++)
- {
- delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
- path_q[q].x=(double) (center.x+mid*cos(fmod((double)
- (theta.p+delta_theta),DegreesToRadians(360.0))));
- path_q[q].y=(double) (center.y+mid*sin(fmod((double)
- (theta.p+delta_theta),DegreesToRadians(360.0))));
- q++;
- }
- path_q[q++]=box_q[2];
- break;
- }
- default:
- break;
- }
- else
- switch (draw_info->linejoin)
- {
- case BevelJoin:
- {
- path_p[p++]=box_p[1];
- path_p[p++]=box_p[2];
- dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
- (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
- if (dot_product <= miterlimit)
- path_q[q++]=box_q[4];
- else
- {
- path_q[q++]=box_q[1];
- path_q[q++]=box_q[2];
- }
- break;
- }
- case MiterJoin:
- {
- dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
- (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
- if (dot_product <= miterlimit)
- {
- path_q[q++]=box_q[4];
- path_p[p++]=box_p[4];
- }
- else
- {
- path_q[q++]=box_q[1];
- path_q[q++]=box_q[2];
- path_p[p++]=box_p[1];
- path_p[p++]=box_p[2];
- }
- break;
- }
- case RoundJoin:
- {
- dot_product=(box_q[4].x-box_p[4].x)*(box_q[4].x-box_p[4].x)+
- (box_q[4].y-box_p[4].y)*(box_q[4].y-box_p[4].y);
- if (dot_product <= miterlimit)
- path_q[q++]=box_q[4];
- else
- {
- path_q[q++]=box_q[1];
- path_q[q++]=box_q[2];
- }
- center=polygon_primitive[n].point;
- theta.p=atan2(box_p[1].y-center.y,box_p[1].x-center.x);
- theta.q=atan2(box_p[2].y-center.y,box_p[2].x-center.x);
- if (theta.p < theta.q)
- theta.p+=2.0*MagickPI;
- arc_segments=(size_t) ceil((double) ((theta.p-theta.q)/
- (2.0*sqrt((double) (1.0/mid)))));
- CheckPathExtent(arc_segments+6*BezierQuantum+360);
- path_p[p++]=box_p[1];
- for (j=1; j < (ssize_t) arc_segments; j++)
- {
- delta_theta=(double) (j*(theta.q-theta.p)/arc_segments);
- path_p[p].x=(double) (center.x+mid*cos(fmod((double)
- (theta.p+delta_theta),DegreesToRadians(360.0))));
- path_p[p].y=(double) (center.y+mid*sin(fmod((double)
- (theta.p+delta_theta),DegreesToRadians(360.0))));
- p++;
- }
- path_p[p++]=box_p[2];
- break;
- }
- default:
- break;
- }
- slope.p=slope.q;
- inverse_slope.p=inverse_slope.q;
- box_p[0]=box_p[2];
- box_p[1]=box_p[3];
- box_q[0]=box_q[2];
- box_q[1]=box_q[3];
- dx.p=dx.q;
- dy.p=dy.q;
- n=i;
- }
- path_p[p++]=box_p[1];
- path_q[q++]=box_q[1];
- /*
- Trace stroked polygon.
- */
- stroke_polygon=(PrimitiveInfo *) AcquireQuantumMemory((size_t)
- (p+q+2UL*closed_path+2UL),sizeof(*stroke_polygon));
- if (stroke_polygon != (PrimitiveInfo *) NULL)
- {
- for (i=0; i < (ssize_t) p; i++)
- {
- stroke_polygon[i]=polygon_primitive[0];
- stroke_polygon[i].point=path_p[i];
- }
- if (closed_path != MagickFalse)
- {
- stroke_polygon[i]=polygon_primitive[0];
- stroke_polygon[i].point=stroke_polygon[0].point;
- i++;
- }
- for ( ; i < (ssize_t) (p+q+closed_path); i++)
- {
- stroke_polygon[i]=polygon_primitive[0];
- stroke_polygon[i].point=path_q[p+q+closed_path-(i+1)];
- }
- if (closed_path != MagickFalse)
- {
- stroke_polygon[i]=polygon_primitive[0];
- stroke_polygon[i].point=stroke_polygon[p+closed_path].point;
- i++;
- }
- stroke_polygon[i]=polygon_primitive[0];
- stroke_polygon[i].point=stroke_polygon[0].point;
- i++;
- stroke_polygon[i].primitive=UndefinedPrimitive;
- stroke_polygon[0].coordinates=(size_t) (p+q+2*closed_path+1);
- }
- path_p=(PointInfo *) RelinquishMagickMemory(path_p);
- path_q=(PointInfo *) RelinquishMagickMemory(path_q);
- polygon_primitive=(PrimitiveInfo *) RelinquishMagickMemory(polygon_primitive);
- return(stroke_polygon);
- }