| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % M M AAA PPPP % |
| % MM MM A A P P % |
| % M M M AAAAA PPPP % |
| % M M A A P % |
| % M M A A P % |
| % % |
| % % |
| % Read/Write Image Colormaps As An Image File. % |
| % % |
| % Software Design % |
| % John Cristy % |
| % July 1992 % |
| % % |
| % % |
| % 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 "magick/studio.h" |
| #include "magick/attribute.h" |
| #include "magick/blob.h" |
| #include "magick/blob-private.h" |
| #include "magick/cache.h" |
| #include "magick/color.h" |
| #include "magick/color-private.h" |
| #include "magick/colormap.h" |
| #include "magick/colormap-private.h" |
| #include "magick/colorspace.h" |
| #include "magick/exception.h" |
| #include "magick/exception-private.h" |
| #include "magick/histogram.h" |
| #include "magick/image.h" |
| #include "magick/image-private.h" |
| #include "magick/list.h" |
| #include "magick/magick.h" |
| #include "magick/memory_.h" |
| #include "magick/quantum-private.h" |
| #include "magick/static.h" |
| #include "magick/statistic.h" |
| #include "magick/string_.h" |
| #include "magick/module.h" |
| |
| /* |
| Forward declarations. |
| */ |
| static MagickBooleanType |
| WriteMAPImage(const ImageInfo *,Image *); |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d M A P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadMAPImage() reads an image of raw RGB colormap and colormap index |
| % bytes and returns it. It allocates the memory necessary for the new Image |
| % structure and returns a pointer to the new image. |
| % |
| % The format of the ReadMAPImage method is: |
| % |
| % Image *ReadMAPImage(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 *ReadMAPImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| IndexPacket |
| index; |
| |
| MagickBooleanType |
| status; |
| |
| register IndexPacket |
| *indexes; |
| |
| register ssize_t |
| x; |
| |
| register PixelPacket |
| *q; |
| |
| register ssize_t |
| i; |
| |
| register unsigned char |
| *p; |
| |
| size_t |
| depth, |
| packet_size, |
| quantum; |
| |
| ssize_t |
| count, |
| y; |
| |
| unsigned char |
| *colormap, |
| *pixels; |
| |
| /* |
| Open image file. |
| */ |
| 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); |
| if ((image->columns == 0) || (image->rows == 0)) |
| ThrowReaderException(OptionError,"MustSpecifyImageSize"); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| /* |
| Initialize image structure. |
| */ |
| image->storage_class=PseudoClass; |
| status=AcquireImageColormap(image,(size_t) |
| (image->offset != 0 ? image->offset : 256)); |
| if (status == MagickFalse) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| depth=GetImageQuantumDepth(image,MagickTrue); |
| packet_size=(size_t) (depth/8); |
| pixels=(unsigned char *) AcquireQuantumMemory(image->columns,packet_size* |
| sizeof(*pixels)); |
| packet_size=(size_t) (image->colors > 256 ? 6UL : 3UL); |
| colormap=(unsigned char *) AcquireQuantumMemory(image->colors,packet_size* |
| sizeof(*colormap)); |
| if ((pixels == (unsigned char *) NULL) || |
| (colormap == (unsigned char *) NULL)) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| /* |
| Read image colormap. |
| */ |
| count=ReadBlob(image,packet_size*image->colors,colormap); |
| if (count != (ssize_t) (packet_size*image->colors)) |
| ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); |
| p=colormap; |
| if (image->depth <= 8) |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| image->colormap[i].red=ScaleCharToQuantum(*p++); |
| image->colormap[i].green=ScaleCharToQuantum(*p++); |
| image->colormap[i].blue=ScaleCharToQuantum(*p++); |
| } |
| else |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| quantum=(*p++ << 8); |
| quantum|=(*p++); |
| image->colormap[i].red=(Quantum) quantum; |
| quantum=(*p++ << 8); |
| quantum|=(*p++); |
| image->colormap[i].green=(Quantum) quantum; |
| quantum=(*p++ << 8); |
| quantum|=(*p++); |
| image->colormap[i].blue=(Quantum) quantum; |
| } |
| colormap=(unsigned char *) RelinquishMagickMemory(colormap); |
| if (image_info->ping != MagickFalse) |
| { |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| /* |
| Read image pixels. |
| */ |
| packet_size=(size_t) (depth/8); |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=pixels; |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (PixelPacket *) NULL) |
| break; |
| indexes=GetAuthenticIndexQueue(image); |
| count=ReadBlob(image,(size_t) packet_size*image->columns,pixels); |
| if (count != (ssize_t) (packet_size*image->columns)) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| index=ConstrainColormapIndex(image,*p); |
| p++; |
| if (image->colors > 256) |
| { |
| index=ConstrainColormapIndex(image,((size_t) index << 8)+(*p)); |
| p++; |
| } |
| SetIndexPixelComponent(indexes+x,index); |
| SetRedPixelComponent(q,image->colormap[(ssize_t) index].red); |
| SetGreenPixelComponent(q,image->colormap[(ssize_t) index].green); |
| SetBluePixelComponent(q,image->colormap[(ssize_t) index].blue); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| } |
| pixels=(unsigned char *) RelinquishMagickMemory(pixels); |
| if (y < (ssize_t) image->rows) |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r M A P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterMAPImage() adds attributes for the MAP 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 RegisterMAPImage method is: |
| % |
| % size_t RegisterMAPImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterMAPImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=SetMagickInfo("MAP"); |
| entry->decoder=(DecodeImageHandler *) ReadMAPImage; |
| entry->encoder=(EncodeImageHandler *) WriteMAPImage; |
| entry->adjoin=MagickFalse; |
| entry->format_type=ExplicitFormatType; |
| entry->raw=MagickTrue; |
| entry->endian_support=MagickTrue; |
| entry->description=ConstantString("Colormap intensities and indices"); |
| entry->module=ConstantString("MAP"); |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r M A P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterMAPImage() removes format registrations made by the |
| % MAP module from the list of supported formats. |
| % |
| % The format of the UnregisterMAPImage method is: |
| % |
| % UnregisterMAPImage(void) |
| % |
| */ |
| ModuleExport void UnregisterMAPImage(void) |
| { |
| (void) UnregisterMagickInfo("MAP"); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e M A P I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WriteMAPImage() writes an image to a file as red, green, and blue |
| % colormap bytes followed by the colormap indexes. |
| % |
| % The format of the WriteMAPImage method is: |
| % |
| % MagickBooleanType WriteMAPImage(const ImageInfo *image_info,Image *image) |
| % |
| % A description of each parameter follows. |
| % |
| % o image_info: the image info. |
| % |
| % o image: The image. |
| % |
| % |
| */ |
| static MagickBooleanType WriteMAPImage(const ImageInfo *image_info,Image *image) |
| { |
| MagickBooleanType |
| status; |
| |
| register const IndexPacket |
| *indexes; |
| |
| register const PixelPacket |
| *p; |
| |
| register ssize_t |
| i, |
| x; |
| |
| register unsigned char |
| *q; |
| |
| size_t |
| depth, |
| packet_size; |
| |
| ssize_t |
| y; |
| |
| unsigned char |
| *colormap, |
| *pixels; |
| |
| /* |
| Open output image file. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickSignature); |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception); |
| if (status == MagickFalse) |
| return(status); |
| if (image->colorspace != RGBColorspace) |
| (void) TransformImageColorspace(image,RGBColorspace); |
| /* |
| Allocate colormap. |
| */ |
| if (IsPaletteImage(image,&image->exception) == MagickFalse) |
| (void) SetImageType(image,PaletteType); |
| depth=GetImageQuantumDepth(image,MagickTrue); |
| packet_size=(size_t) (depth/8); |
| pixels=(unsigned char *) AcquireQuantumMemory(image->columns,packet_size* |
| sizeof(*pixels)); |
| packet_size=(size_t) (image->colors > 256 ? 6UL : 3UL); |
| colormap=(unsigned char *) AcquireQuantumMemory(image->colors,packet_size* |
| sizeof(*colormap)); |
| if ((pixels == (unsigned char *) NULL) || |
| (colormap == (unsigned char *) NULL)) |
| ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| /* |
| Write colormap to file. |
| */ |
| q=colormap; |
| if (image->depth <= 8) |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| *q++=(unsigned char) image->colormap[i].red; |
| *q++=(unsigned char) image->colormap[i].green; |
| *q++=(unsigned char) image->colormap[i].blue; |
| } |
| else |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| *q++=(unsigned char) ((size_t) image->colormap[i].red >> 8); |
| *q++=(unsigned char) image->colormap[i].red; |
| *q++=(unsigned char) ((size_t) image->colormap[i].green >> 8); |
| *q++=(unsigned char) image->colormap[i].green; |
| *q++=(unsigned char) ((size_t) image->colormap[i].blue >> 8); |
| *q++=(unsigned char) image->colormap[i].blue; |
| } |
| (void) WriteBlob(image,packet_size*image->colors,colormap); |
| colormap=(unsigned char *) RelinquishMagickMemory(colormap); |
| /* |
| Write image pixels to file. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception); |
| if (p == (const PixelPacket *) NULL) |
| break; |
| indexes=GetVirtualIndexQueue(image); |
| q=pixels; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| if (image->colors > 256) |
| *q++=(unsigned char) ((size_t) GetIndexPixelComponent(indexes+x) >> 8); |
| *q++=(unsigned char) GetIndexPixelComponent(indexes+x); |
| } |
| (void) WriteBlob(image,(size_t) (q-pixels),pixels); |
| } |
| pixels=(unsigned char *) RelinquishMagickMemory(pixels); |
| (void) CloseBlob(image); |
| return(status); |
| } |