| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % GGGG RRRR AAA DDDD IIIII EEEEE N N TTTTT % |
| % G R R A A D D I E NN N T % |
| % G GG RRRR AAAAA D D I EEE N N N T % |
| % G G R R A A D D I E N NN T % |
| % GGG R R A A DDDD IIIII EEEEE N N T % |
| % % |
| % % |
| % Read An Image Filled Using Gradient. % |
| % % |
| % Software Design % |
| % John Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2013 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/attribute.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/channel.h" |
| #include "MagickCore/color.h" |
| #include "MagickCore/color-private.h" |
| #include "MagickCore/colorspace-private.h" |
| #include "MagickCore/draw.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/paint.h" |
| #include "MagickCore/pixel-accessor.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/module.h" |
| #include "MagickCore/studio.h" |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d G R A D I E N T I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadGRADIENTImage creates a gradient image and initializes it to |
| % the color range as specified by the filename. It allocates the memory |
| % necessary for the new Image structure and returns a pointer to the new |
| % image. |
| % |
| % The format of the ReadGRADIENTImage method is: |
| % |
| % Image *ReadGRADIENTImage(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 *ReadGRADIENTImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| char |
| colorname[MaxTextExtent]; |
| |
| Image |
| *image; |
| |
| MagickBooleanType |
| icc_color, |
| status; |
| |
| PixelInfo |
| start_color, |
| stop_color; |
| |
| /* |
| 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); |
| if ((image->columns == 0) || (image->rows == 0)) |
| ThrowReaderException(OptionError,"MustSpecifyImageSize"); |
| (void) SetImageAlpha(image,(Quantum) TransparentAlpha,exception); |
| (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent); |
| (void) CopyMagickString(colorname,image_info->filename,MaxTextExtent); |
| (void) sscanf(image_info->filename,"%[^-]",colorname); |
| icc_color=MagickFalse; |
| if (LocaleCompare(colorname,"icc") == 0) |
| { |
| (void) ConcatenateMagickString(colorname,"-",MaxTextExtent); |
| (void) sscanf(image_info->filename,"%*[^-]-%[^-]",colorname+4); |
| icc_color=MagickTrue; |
| } |
| status=QueryColorCompliance(colorname,AllCompliance,&start_color,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImage(image); |
| return((Image *) NULL); |
| } |
| (void) CopyMagickString(colorname,"white",MaxTextExtent); |
| if (GetPixelInfoIntensity(&start_color) > (Quantum) (QuantumRange/2)) |
| (void) CopyMagickString(colorname,"black",MaxTextExtent); |
| if (icc_color == MagickFalse) |
| (void) sscanf(image_info->filename,"%*[^-]-%s",colorname); |
| else |
| (void) sscanf(image_info->filename,"%*[^-]-%*[^-]-%s",colorname); |
| status=QueryColorCompliance(colorname,AllCompliance,&stop_color,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImage(image); |
| return((Image *) NULL); |
| } |
| status=GradientImage(image,LocaleCompare(image_info->magick,"GRADIENT") == 0 ? |
| LinearGradient : RadialGradient,PadSpread,&start_color,&stop_color, |
| exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| if ((start_color.alpha_trait != BlendPixelTrait) && |
| (stop_color.alpha_trait != BlendPixelTrait)) |
| (void) SetImageAlphaChannel(image,DeactivateAlphaChannel,exception); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r G R A D I E N T I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterGRADIENTImage() adds attributes for the GRADIENT image 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 RegisterGRADIENTImage method is: |
| % |
| % size_t RegisterGRADIENTImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterGRADIENTImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=SetMagickInfo("GRADIENT"); |
| entry->decoder=(DecodeImageHandler *) ReadGRADIENTImage; |
| entry->adjoin=MagickFalse; |
| entry->raw=MagickTrue; |
| entry->format_type=ImplicitFormatType; |
| entry->description=ConstantString("Gradual linear passing from one shade to " |
| "another"); |
| entry->module=ConstantString("GRADIENT"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("RADIAL-GRADIENT"); |
| entry->decoder=(DecodeImageHandler *) ReadGRADIENTImage; |
| entry->adjoin=MagickFalse; |
| entry->raw=MagickTrue; |
| entry->format_type=ImplicitFormatType; |
| entry->description=ConstantString("Gradual radial passing from one shade to " |
| "another"); |
| entry->module=ConstantString("GRADIENT"); |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r G R A D I E N T I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterGRADIENTImage() removes format registrations made by the |
| % GRADIENT module from the list of supported formats. |
| % |
| % The format of the UnregisterGRADIENTImage method is: |
| % |
| % UnregisterGRADIENTImage(void) |
| % |
| */ |
| ModuleExport void UnregisterGRADIENTImage(void) |
| { |
| (void) UnregisterMagickInfo("RADIAL-GRADIENT"); |
| (void) UnregisterMagickInfo("GRADIENT"); |
| } |