| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 % |
| % Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2021 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/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/constitute.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 *ReadXCImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| PixelInfo |
| pixel; |
| |
| ssize_t |
| x; |
| |
| Quantum |
| *q; |
| |
| ssize_t |
| y; |
| |
| /* |
| 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); |
| if (image->columns == 0) |
| image->columns=1; |
| if (image->rows == 0) |
| image->rows=1; |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| (void) CopyMagickString(image->filename,image_info->filename, |
| MagickPathExtent); |
| if (*image_info->filename == '\0') |
| pixel=image->background_color; |
| else |
| { |
| status=QueryColorCompliance((char *) image_info->filename,AllCompliance, |
| &pixel,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImage(image); |
| return((Image *) NULL); |
| } |
| } |
| (void) SetImageColorspace(image,pixel.colorspace,exception); |
| image->alpha_trait=pixel.alpha_trait; |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| SetPixelViaPixelInfo(image,&pixel,q); |
| q+=GetPixelChannels(image); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| } |
| return(GetFirstImageInList(image)); |
| } |
| |
| static Image *ReadGRADIENTImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| char |
| start_color[MagickPathExtent], |
| stop_color[MagickPathExtent]; |
| |
| Image |
| *image; |
| |
| ImageInfo |
| *read_info; |
| |
| MagickBooleanType |
| status; |
| |
| StopInfo |
| *stops; |
| |
| /* |
| Identify start and stop gradient colors. |
| */ |
| 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); |
| (void) CopyMagickString(start_color,"white",MagickPathExtent); |
| (void) CopyMagickString(stop_color,"black",MagickPathExtent); |
| if (*image_info->filename != '\0') |
| { |
| char |
| *p; |
| |
| (void) CopyMagickString(start_color,image_info->filename, |
| MagickPathExtent); |
| for (p=start_color; (*p != '-') && (*p != '\0'); p++) |
| if (*p == '(') |
| { |
| for (p++; (*p != ')') && (*p != '\0'); p++); |
| if (*p == '\0') |
| break; |
| } |
| if (*p == '-') |
| (void) CopyMagickString(stop_color,p+1,MagickPathExtent); |
| *p='\0'; |
| } |
| /* |
| Create base gradient image from start color. |
| */ |
| read_info=CloneImageInfo(image_info); |
| SetImageInfoBlob(read_info,(void *) NULL,0); |
| (void) CopyMagickString(read_info->filename,start_color,MagickPathExtent); |
| image=ReadXCImage(read_info,exception); |
| read_info=DestroyImageInfo(read_info); |
| if (image == (Image *) NULL) |
| return((Image *) NULL); |
| /* |
| Create gradient stops. |
| */ |
| stops=(StopInfo *) AcquireQuantumMemory(2,sizeof(*stops)); |
| if (stops == (StopInfo *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| stops[0].offset=0.0; |
| stops[1].offset=1.0; |
| status=QueryColorCompliance(start_color,AllCompliance,&stops[0].color, |
| exception); |
| if (status != MagickFalse) |
| status=QueryColorCompliance(stop_color,AllCompliance,&stops[1].color, |
| exception); |
| if (status == MagickFalse) |
| { |
| stops=(StopInfo *) RelinquishMagickMemory(stops); |
| image=DestroyImage(image); |
| return((Image *) NULL); |
| } |
| (void) SetImageColorspace(image,stops[0].color.colorspace,exception); |
| if ((stops[0].color.alpha_trait != UndefinedPixelTrait) || |
| (stops[1].color.alpha_trait != UndefinedPixelTrait)) |
| SetImageAlpha(image,TransparentAlpha,exception); |
| /* |
| Paint gradient. |
| */ |
| status=GradientImage(image,LocaleCompare(image_info->magick,"GRADIENT") == 0 ? |
| LinearGradient : RadialGradient,PadSpread,stops,2,exception); |
| stops=(StopInfo *) RelinquishMagickMemory(stops); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| 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=AcquireMagickInfo("GRADIENT","GRADIENT", |
| "Gradual linear passing from one shade to another"); |
| entry->decoder=(DecodeImageHandler *) ReadGRADIENTImage; |
| entry->flags^=CoderAdjoinFlag; |
| entry->flags|=CoderRawSupportFlag; |
| entry->format_type=ImplicitFormatType; |
| (void) RegisterMagickInfo(entry); |
| entry=AcquireMagickInfo("GRADIENT","RADIAL-GRADIENT", |
| "Gradual radial passing from one shade to another"); |
| entry->decoder=(DecodeImageHandler *) ReadGRADIENTImage; |
| entry->flags^=CoderAdjoinFlag; |
| entry->flags|=CoderRawSupportFlag; |
| entry->format_type=ImplicitFormatType; |
| (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"); |
| } |