| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 M A A N NN G G O O % |
| % P A A N N GGGG OOO % |
| % % |
| % % |
| % Read Pango Markup Language Format % |
| % % |
| % Software Design % |
| % John Cristy % |
| % March 2012 % |
| % % |
| % % |
| % Copyright 1999-2011 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 % |
| % % |
| % http://www.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/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/module.h" |
| #include "MagickCore/memory_.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" |
| #if defined(MAGICKCORE_PANGOFT2_DELEGATE) |
| #include <pango/pango.h> |
| #include <pango/pangoft2.h> |
| #endif |
| |
| #if defined(MAGICKCORE_PANGOFT2_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) |
| { |
| char |
| *caption, |
| *property; |
| |
| DrawInfo |
| *draw_info; |
| |
| FT_Bitmap |
| *canvas; |
| |
| Image |
| *image; |
| |
| PangoContext |
| *context; |
| |
| PangoFontDescription |
| *description; |
| |
| PangoFontMap |
| *fontmap; |
| |
| PangoLayout |
| *layout; |
| |
| PangoRectangle |
| extent; |
| |
| PixelInfo |
| fill_color; |
| |
| register Quantum |
| *q; |
| |
| register unsigned char |
| *p; |
| |
| ssize_t |
| y; |
| |
| /* |
| Initialize Image structure. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickSignature); |
| if (image_info->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
| image_info->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickSignature); |
| image=AcquireImage(image_info,exception); |
| (void) ResetImagePage(image,"0x0+0+0"); |
| /* |
| Get context. |
| */ |
| fontmap=(PangoFontMap *) pango_ft2_font_map_new(); |
| pango_ft2_font_map_set_resolution((PangoFT2FontMap *) fontmap, |
| image->resolution.x,image->resolution.y); |
| pango_ft2_font_map_set_default_substitute((PangoFT2FontMap *) fontmap,NULL, |
| NULL,NULL); |
| context=pango_font_map_create_context(fontmap); |
| /* |
| Render caption. |
| */ |
| layout=pango_layout_new(context); |
| draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL); |
| description=pango_font_description_from_string(draw_info->font == |
| (char *) NULL ? "helvetica" : draw_info->font); |
| pango_font_description_set_size(description,PANGO_SCALE* |
| draw_info->pointsize); |
| pango_layout_set_font_description(layout,description); |
| pango_font_description_free(description); |
| property=InterpretImageProperties(image_info,image,image_info->filename, |
| exception); |
| (void) SetImageProperty(image,"caption",property,exception); |
| property=DestroyString(property); |
| caption=ConstantString(GetImageProperty(image,"caption",exception)); |
| pango_layout_set_text(layout,caption,-1); |
| pango_layout_context_changed(layout); |
| if (image->columns != 0) |
| pango_layout_set_width(layout,(PANGO_SCALE*image->columns* |
| image->resolution.x+36.0)/72.0); |
| else |
| { |
| pango_layout_get_pixel_extents(layout,NULL,&extent); |
| image->columns=extent.x+extent.width; |
| } |
| if (image->rows != 0) |
| pango_layout_set_height(layout,(PANGO_SCALE*image->columns* |
| image->resolution.x+36.0)/72.0); |
| else |
| { |
| pango_layout_get_pixel_extents(layout,NULL,&extent); |
| image->rows=extent.y+extent.height; |
| } |
| /* |
| Create canvas. |
| */ |
| canvas=(FT_Bitmap *) AcquireMagickMemory(sizeof(*canvas)); |
| if (canvas == (FT_Bitmap *) NULL) |
| { |
| draw_info=DestroyDrawInfo(draw_info); |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| } |
| canvas->width=image->columns; |
| canvas->pitch=(canvas->width+3) & ~3; |
| canvas->rows=image->rows; |
| canvas->buffer=(unsigned char *) AcquireQuantumMemory(canvas->pitch, |
| canvas->rows*sizeof(*canvas->buffer)); |
| if (canvas->buffer == (unsigned char *) NULL) |
| { |
| draw_info=DestroyDrawInfo(draw_info); |
| canvas=(FT_Bitmap *) RelinquishMagickMemory(canvas); |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| } |
| canvas->num_grays=256; |
| canvas->pixel_mode=ft_pixel_mode_grays; |
| ResetMagickMemory(canvas->buffer,0x00,canvas->pitch*canvas->rows); |
| pango_ft2_render_layout(canvas,layout,0,0); |
| /* |
| Convert caption to image. |
| */ |
| if (SetImageBackgroundColor(image,exception) == MagickFalse) |
| { |
| draw_info=DestroyDrawInfo(draw_info); |
| canvas->buffer=(unsigned char *) RelinquishMagickMemory(canvas->buffer); |
| canvas=(FT_Bitmap *) RelinquishMagickMemory(canvas); |
| caption=DestroyString(caption); |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| GetPixelInfo(image,&fill_color); |
| p=canvas->buffer; |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| 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++) |
| { |
| MagickRealType |
| fill_opacity; |
| |
| (void) GetFillColor(draw_info,x,y,&fill_color,exception); |
| fill_opacity=(*p)*fill_color.alpha/canvas->num_grays; |
| if (draw_info->text_antialias == MagickFalse) |
| fill_opacity=fill_opacity >= 0.5 ? 1.0 : 0.0; |
| CompositePixelOver(image,&fill_color,fill_opacity,q, |
| GetPixelAlpha(image,q),q); |
| p++; |
| q+=GetPixelChannels(image); |
| } |
| for ( ; x < (ssize_t) ((canvas->width+3) & ~3); x++) |
| p++; |
| } |
| /* |
| Relinquish resources. |
| */ |
| draw_info=DestroyDrawInfo(draw_info); |
| canvas->buffer=(unsigned char *) RelinquishMagickMemory(canvas->buffer); |
| canvas=(FT_Bitmap *) RelinquishMagickMemory(canvas); |
| 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) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=SetMagickInfo("PANGO"); |
| #if defined(MAGICKCORE_PANGOFT2_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadPANGOImage; |
| #endif |
| entry->description=ConstantString("Pango Markup Language"); |
| entry->adjoin=MagickFalse; |
| entry->module=ConstantString("PANGO"); |
| (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"); |
| } |