| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % PPPP AAA N N GGGG OOO % |
| % P P A A NN N G O O % |
| % PPPP AAAAA N N N G GGG O O % |
| % P A A N NN G G O O % |
| % P A A N N GGGG OOO % |
| % % |
| % % |
| % Read Pango Markup Language Format % |
| % % |
| % Software Design % |
| % Cristy % |
| % March 2012 % |
| % % |
| % % |
| % Copyright 1999-2020 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. % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % |
| */ |
| |
| /* |
| Include declarations. |
| */ |
| #include "MagickCore/studio.h" |
| #include "MagickCore/annotate.h" |
| #include "MagickCore/artifact.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/composite-private.h" |
| #include "MagickCore/draw.h" |
| #include "MagickCore/draw-private.h" |
| #include "MagickCore/exception.h" |
| #include "MagickCore/exception-private.h" |
| #include "MagickCore/image.h" |
| #include "MagickCore/image-private.h" |
| #include "MagickCore/list.h" |
| #include "MagickCore/magick.h" |
| #include "MagickCore/memory_.h" |
| #include "MagickCore/module.h" |
| #include "MagickCore/monitor.h" |
| #include "MagickCore/monitor-private.h" |
| #include "MagickCore/option.h" |
| #include "MagickCore/pixel-accessor.h" |
| #include "MagickCore/property.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/string-private.h" |
| #include "MagickCore/token.h" |
| #include "MagickCore/utility.h" |
| #if defined(MAGICKCORE_PANGOCAIRO_DELEGATE) |
| #include <pango/pango.h> |
| #include <pango/pangocairo.h> |
| #include <pango/pango-features.h> |
| #endif |
| |
| /* |
| Define declarations. |
| */ |
| #define DefaultSVGDensity 96.0 |
| |
| #if defined(MAGICKCORE_PANGOCAIRO_DELEGATE) |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d P A N G O I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadPANGOImage() reads an image in the Pango Markup Language Format. |
| % |
| % The format of the ReadPANGOImage method is: |
| % |
| % Image *ReadPANGOImage(const ImageInfo *image_info, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image_info: the image info. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| static Image *ReadPANGOImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| cairo_font_options_t |
| *font_options; |
| |
| cairo_surface_t |
| *surface; |
| |
| char |
| *caption, |
| *property; |
| |
| cairo_t |
| *cairo_image; |
| |
| const char |
| *option; |
| |
| DrawInfo |
| *draw_info; |
| |
| Image |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| MemoryInfo |
| *pixel_info; |
| |
| PangoAlignment |
| align; |
| |
| PangoContext |
| *context; |
| |
| PangoFontDescription |
| *description; |
| |
| PangoFontMap |
| *fontmap; |
| |
| PangoGravity |
| gravity; |
| |
| PangoLayout |
| *layout; |
| |
| PangoRectangle |
| extent; |
| |
| PixelInfo |
| fill_color; |
| |
| RectangleInfo |
| page; |
| |
| register unsigned char |
| *p; |
| |
| size_t |
| stride; |
| |
| ssize_t |
| y; |
| |
| unsigned char |
| *pixels; |
| |
| /* |
| Initialize Image structure. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickCoreSignature); |
| if (image_info->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
| image_info->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| image=AcquireImage(image_info,exception); |
| (void) ResetImagePage(image,"0x0+0+0"); |
| if ((image->columns != 0) && (image->rows != 0)) |
| (void) SetImageBackgroundColor(image,exception); |
| /* |
| Format caption. |
| */ |
| option=GetImageOption(image_info,"filename"); |
| if (option == (const char *) NULL) |
| property=InterpretImageProperties((ImageInfo *) image_info,image, |
| image_info->filename,exception); |
| else |
| if (LocaleNCompare(option,"pango:",6) == 0) |
| property=InterpretImageProperties((ImageInfo *) image_info,image,option+6, |
| exception); |
| else |
| property=InterpretImageProperties((ImageInfo *) image_info,image,option, |
| exception); |
| if (property != (char *) NULL) |
| { |
| (void) SetImageProperty(image,"caption",property,exception); |
| property=DestroyString(property); |
| } |
| caption=ConstantString(GetImageProperty(image,"caption",exception)); |
| /* |
| Get context. |
| */ |
| fontmap=pango_cairo_font_map_new(); |
| pango_cairo_font_map_set_resolution(PANGO_CAIRO_FONT_MAP(fontmap), |
| image->resolution.x == 0.0 ? DefaultSVGDensity : image->resolution.x); |
| font_options=cairo_font_options_create(); |
| option=GetImageOption(image_info,"pango:hinting"); |
| if (option != (const char *) NULL) |
| { |
| if (LocaleCompare(option,"none") != 0) |
| cairo_font_options_set_hint_style(font_options,CAIRO_HINT_STYLE_NONE); |
| if (LocaleCompare(option,"full") != 0) |
| cairo_font_options_set_hint_style(font_options,CAIRO_HINT_STYLE_FULL); |
| } |
| context=pango_font_map_create_context(fontmap); |
| pango_cairo_context_set_font_options(context,font_options); |
| cairo_font_options_destroy(font_options); |
| option=GetImageOption(image_info,"pango:language"); |
| if (option != (const char *) NULL) |
| pango_context_set_language(context,pango_language_from_string(option)); |
| draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL); |
| pango_context_set_base_dir(context,draw_info->direction == |
| RightToLeftDirection ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR); |
| switch (draw_info->gravity) |
| { |
| case NorthGravity: |
| { |
| gravity=PANGO_GRAVITY_NORTH; |
| break; |
| } |
| case NorthWestGravity: |
| case WestGravity: |
| case SouthWestGravity: |
| { |
| gravity=PANGO_GRAVITY_WEST; |
| break; |
| } |
| case NorthEastGravity: |
| case EastGravity: |
| case SouthEastGravity: |
| { |
| gravity=PANGO_GRAVITY_EAST; |
| break; |
| } |
| case SouthGravity: |
| { |
| gravity=PANGO_GRAVITY_SOUTH; |
| break; |
| } |
| default: |
| { |
| gravity=PANGO_GRAVITY_AUTO; |
| break; |
| } |
| } |
| pango_context_set_base_gravity(context,gravity); |
| option=GetImageOption(image_info,"pango:gravity-hint"); |
| if (option != (const char *) NULL) |
| { |
| if (LocaleCompare(option,"line") == 0) |
| pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_LINE); |
| if (LocaleCompare(option,"natural") == 0) |
| pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_NATURAL); |
| if (LocaleCompare(option,"strong") == 0) |
| pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_STRONG); |
| } |
| /* |
| Configure layout. |
| */ |
| layout=pango_layout_new(context); |
| option=GetImageOption(image_info,"pango:auto-dir"); |
| if (option != (const char *) NULL) |
| pango_layout_set_auto_dir(layout,1); |
| option=GetImageOption(image_info,"pango:ellipsize"); |
| if (option != (const char *) NULL) |
| { |
| if (LocaleCompare(option,"end") == 0) |
| pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_END); |
| if (LocaleCompare(option,"middle") == 0) |
| pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_MIDDLE); |
| if (LocaleCompare(option,"none") == 0) |
| pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_NONE); |
| if (LocaleCompare(option,"start") == 0) |
| pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_START); |
| } |
| option=GetImageOption(image_info,"pango:justify"); |
| if (IsStringTrue(option) != MagickFalse) |
| pango_layout_set_justify(layout,1); |
| option=GetImageOption(image_info,"pango:single-paragraph"); |
| if (IsStringTrue(option) != MagickFalse) |
| pango_layout_set_single_paragraph_mode(layout,1); |
| option=GetImageOption(image_info,"pango:wrap"); |
| if (option != (const char *) NULL) |
| { |
| if (LocaleCompare(option,"char") == 0) |
| pango_layout_set_wrap(layout,PANGO_WRAP_CHAR); |
| if (LocaleCompare(option,"word") == 0) |
| pango_layout_set_wrap(layout,PANGO_WRAP_WORD); |
| if (LocaleCompare(option,"word-char") == 0) |
| pango_layout_set_wrap(layout,PANGO_WRAP_WORD_CHAR); |
| } |
| option=GetImageOption(image_info,"pango:indent"); |
| if (option != (const char *) NULL) |
| pango_layout_set_indent(layout,(int) ((StringToLong(option)* |
| (image->resolution.x == 0.0 ? DefaultSVGDensity : image->resolution.x)* |
| PANGO_SCALE+DefaultSVGDensity/2)/DefaultSVGDensity+0.5)); |
| switch (draw_info->align) |
| { |
| case CenterAlign: align=PANGO_ALIGN_CENTER; break; |
| case RightAlign: align=PANGO_ALIGN_RIGHT; break; |
| case LeftAlign: align=PANGO_ALIGN_LEFT; break; |
| default: |
| { |
| if (draw_info->gravity == CenterGravity) |
| { |
| align=PANGO_ALIGN_CENTER; |
| break; |
| } |
| align=PANGO_ALIGN_LEFT; |
| break; |
| } |
| } |
| if ((align != PANGO_ALIGN_CENTER) && |
| (draw_info->direction == RightToLeftDirection)) |
| align=(PangoAlignment) (PANGO_ALIGN_LEFT+PANGO_ALIGN_RIGHT-align); |
| option=GetImageOption(image_info,"pango:align"); |
| if (option != (const char *) NULL) |
| { |
| if (LocaleCompare(option,"center") == 0) |
| align=PANGO_ALIGN_CENTER; |
| if (LocaleCompare(option,"left") == 0) |
| align=PANGO_ALIGN_LEFT; |
| if (LocaleCompare(option,"right") == 0) |
| align=PANGO_ALIGN_RIGHT; |
| } |
| pango_layout_set_alignment(layout,align); |
| if (draw_info->font == (char *) NULL) |
| description=pango_font_description_new(); |
| else |
| description=pango_font_description_from_string(draw_info->font); |
| pango_font_description_set_size(description,(int) (PANGO_SCALE* |
| draw_info->pointsize+0.5)); |
| pango_layout_set_font_description(layout,description); |
| pango_font_description_free(description); |
| option=GetImageOption(image_info,"pango:markup"); |
| if ((option != (const char *) NULL) && (IsStringTrue(option) == MagickFalse)) |
| pango_layout_set_text(layout,caption,-1); |
| else |
| { |
| GError |
| *error; |
| |
| error=(GError *) NULL; |
| if (pango_parse_markup(caption,-1,0,NULL,NULL,NULL,&error) == 0) |
| (void) ThrowMagickException(exception,GetMagickModule(),CoderError, |
| error->message,"`%s'",image_info->filename); |
| pango_layout_set_markup(layout,caption,-1); |
| } |
| pango_layout_context_changed(layout); |
| page.x=0; |
| page.y=0; |
| if (image_info->page != (char *) NULL) |
| (void) ParseAbsoluteGeometry(image_info->page,&page); |
| if (image->columns == 0) |
| { |
| pango_layout_get_extents(layout,NULL,&extent); |
| image->columns=(extent.x+extent.width+PANGO_SCALE/2)/PANGO_SCALE+2*page.x; |
| } |
| else |
| { |
| image->columns-=2*page.x; |
| pango_layout_set_width(layout,(int) ((PANGO_SCALE*image->columns* |
| (image->resolution.x == 0.0 ? DefaultSVGDensity : image->resolution.x)+ |
| DefaultSVGDensity/2)/DefaultSVGDensity+0.5)); |
| } |
| if (image->rows == 0) |
| { |
| pango_layout_get_extents(layout,NULL,&extent); |
| image->rows=(extent.y+extent.height+PANGO_SCALE/2)/PANGO_SCALE+2*page.y; |
| } |
| else |
| { |
| image->rows-=2*page.y; |
| pango_layout_set_height(layout,(int) ((PANGO_SCALE*image->rows* |
| (image->resolution.y == 0.0 ? DefaultSVGDensity : image->resolution.y)+ |
| DefaultSVGDensity/2)/DefaultSVGDensity+0.5)); |
| } |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| /* |
| Render markup. |
| */ |
| stride=(size_t) cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, |
| (int) image->columns); |
| pixel_info=AcquireVirtualMemory(image->rows,stride*sizeof(*pixels)); |
| if (pixel_info == (MemoryInfo *) NULL) |
| { |
| draw_info=DestroyDrawInfo(draw_info); |
| caption=DestroyString(caption); |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| } |
| pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info); |
| surface=cairo_image_surface_create_for_data(pixels,CAIRO_FORMAT_ARGB32, |
| (int) image->columns,(int) image->rows,(int) stride); |
| cairo_image=cairo_create(surface); |
| cairo_set_operator(cairo_image,CAIRO_OPERATOR_CLEAR); |
| cairo_paint(cairo_image); |
| cairo_set_operator(cairo_image,CAIRO_OPERATOR_OVER); |
| cairo_translate(cairo_image,page.x,page.y); |
| cairo_set_source_rgba(cairo_image,QuantumScale*draw_info->fill.red, |
| QuantumScale*draw_info->fill.green,QuantumScale*draw_info->fill.blue, |
| QuantumScale*draw_info->fill.alpha); |
| pango_cairo_show_layout(cairo_image,layout); |
| cairo_destroy(cairo_image); |
| cairo_surface_destroy(surface); |
| g_object_unref(layout); |
| g_object_unref(fontmap); |
| /* |
| Convert surface to image. |
| */ |
| (void) SetImageBackgroundColor(image,exception); |
| p=pixels; |
| GetPixelInfo(image,&fill_color); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register Quantum |
| *q; |
| |
| register ssize_t |
| x; |
| |
| q=GetAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| double |
| gamma; |
| |
| fill_color.blue=(double) ScaleCharToQuantum(*p++); |
| fill_color.green=(double) ScaleCharToQuantum(*p++); |
| fill_color.red=(double) ScaleCharToQuantum(*p++); |
| fill_color.alpha=(double) ScaleCharToQuantum(*p++); |
| /* |
| Disassociate alpha. |
| */ |
| gamma=QuantumScale*fill_color.alpha; |
| gamma=PerceptibleReciprocal(gamma); |
| fill_color.blue*=gamma; |
| fill_color.green*=gamma; |
| fill_color.red*=gamma; |
| CompositePixelOver(image,&fill_color,fill_color.alpha,q,(double) |
| GetPixelAlpha(image,q),q); |
| q+=GetPixelChannels(image); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| /* |
| Relinquish resources. |
| */ |
| pixel_info=RelinquishVirtualMemory(pixel_info); |
| draw_info=DestroyDrawInfo(draw_info); |
| caption=DestroyString(caption); |
| return(GetFirstImageInList(image)); |
| } |
| #endif |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r P A N G O I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterPANGOImage() adds attributes for the Pango Markup Language format to |
| % the list of supported formats. The attributes include the image format |
| % tag, a method to read and/or write the format, whether the format |
| % supports the saving of more than one frame to the same file or blob, |
| % whether the format supports native in-memory I/O, and a brief |
| % description of the format. |
| % |
| % The format of the RegisterPANGOImage method is: |
| % |
| % size_t RegisterPANGOImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterPANGOImage(void) |
| { |
| char |
| version[MagickPathExtent]; |
| |
| MagickInfo |
| *entry; |
| |
| *version='\0'; |
| #if defined(PANGO_VERSION_STRING) |
| (void) FormatLocaleString(version,MagickPathExtent,"Pangocairo %s", |
| PANGO_VERSION_STRING); |
| #endif |
| entry=AcquireMagickInfo("PANGO","PANGO","Pango Markup Language"); |
| #if defined(MAGICKCORE_PANGOCAIRO_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadPANGOImage; |
| #endif |
| if (*version != '\0') |
| entry->version=ConstantString(version); |
| entry->flags^=CoderAdjoinFlag; |
| entry->flags^=CoderDecoderThreadSupportFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r P A N G O I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterPANGOImage() removes format registrations made by the Pango module |
| % from the list of supported formats. |
| % |
| % The format of the UnregisterPANGOImage method is: |
| % |
| % UnregisterPANGOImage(void) |
| % |
| */ |
| ModuleExport void UnregisterPANGOImage(void) |
| { |
| (void) UnregisterMagickInfo("PANGO"); |
| } |