/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % 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 1999-2014 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) SetImageColorspace(image,start_color.colorspace,exception); (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"); }