/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % 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 "magick/studio.h" #include "magick/blob.h" #include "magick/blob-private.h" #include "magick/channel.h" #include "magick/color.h" #include "magick/color-private.h" #include "magick/colorspace-private.h" #include "magick/draw.h" #include "magick/exception.h" #include "magick/exception-private.h" #include "magick/image.h" #include "magick/image-private.h" #include "magick/list.h" #include "magick/magick.h" #include "magick/memory_.h" #include "magick/paint.h" #include "magick/pixel-accessor.h" #include "magick/pixel-private.h" #include "magick/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/module.h" #include "magick/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; IndexPacket index, *indexes; MagickBooleanType status; MagickPixelPacket color; PixelPacket pixel; ssize_t x; PixelPacket *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); if (image->columns == 0) image->columns=1; if (image->rows == 0) image->rows=1; status=SetImageExtent(image,image->columns,image->rows); if (status == MagickFalse) { InheritException(exception,&image->exception); return(DestroyImageList(image)); } (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent); status=QueryMagickColor((char *) image_info->filename,&color,exception); if (status == MagickFalse) { image=DestroyImage(image); return((Image *) NULL); } (void) SetImageColorspace(image,color.colorspace); image->matte=color.matte; (void) memset(&pixel,0,sizeof(pixel)); index=0; SetPixelPacket(image,&color,&pixel,&index); for (y=0; y < (ssize_t) image->rows; y++) { q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (PixelPacket *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) *q++=pixel; if (image->colorspace == CMYKColorspace) { indexes=GetAuthenticIndexQueue(image); for (x=0; x < (ssize_t) image->columns; x++) SetPixelIndex(indexes+x,index); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; } return(GetFirstImageInList(image)); } static Image *ReadGRADIENTImage(const ImageInfo *image_info, ExceptionInfo *exception) { char colorname[MaxTextExtent+4]; Image *image; ImageInfo *read_info; MagickBooleanType icc_color, status; MagickPixelPacket start_pixel, stop_pixel; PixelPacket start_color, stop_color; /* 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); read_info=CloneImageInfo(image_info); SetImageInfoBlob(read_info,(void *) NULL,0); (void) CopyMagickString(colorname,image_info->filename,MaxTextExtent); (void) sscanf(image_info->filename,"%[^-]",colorname); (void) CopyMagickString(read_info->filename,colorname,MaxTextExtent); image=ReadXCImage(read_info,exception); read_info=DestroyImageInfo(read_info); if (image == (Image *) NULL) return((Image *) NULL); (void) SetImageOpacity(image,(Quantum) TransparentOpacity); (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent); icc_color=MagickFalse; if (LocaleCompare(colorname,"icc") == 0) { (void) ConcatenateMagickString(colorname,"-",MaxTextExtent); (void) sscanf(image_info->filename,"%*[^-]-%[^-]",colorname+4); icc_color=MagickTrue; } if (QueryColorDatabase(colorname,&start_color,exception) == MagickFalse) { image=DestroyImage(image); return((Image *) NULL); } (void) QueryMagickColor(colorname,&start_pixel,exception); (void) CopyMagickString(colorname,"white",MaxTextExtent); if (GetPixelLuma(image,&start_color) > (QuantumRange/2.0)) (void) CopyMagickString(colorname,"black",MaxTextExtent); if (icc_color == MagickFalse) (void) sscanf(image_info->filename,"%*[^-]-%[^-]",colorname); else (void) sscanf(image_info->filename,"%*[^-]-%*[^-]-%[^-]",colorname); if (QueryColorDatabase(colorname,&stop_color,exception) == MagickFalse) { image=DestroyImage(image); return((Image *) NULL); } (void) QueryMagickColor(colorname,&stop_pixel,exception); (void) SetImageColorspace(image,start_pixel.colorspace); image->matte=start_pixel.matte; if (stop_pixel.matte != MagickFalse) image->matte=MagickTrue; status=GradientImage(image,LocaleCompare(image_info->magick,"GRADIENT") == 0 ? LinearGradient : RadialGradient,PadSpread,&start_color,&stop_color); 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=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->magick_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->magick_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"); }