| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % JJJJJ BBBB IIIII GGGG % |
| % J B B I G % |
| % J BBBB I G GG % |
| % J J B B I G G % |
| % JJJ BBBB IIIII GGG % |
| % % |
| % % |
| % Read/Write JBIG Image Format % |
| % % |
| % Software Design % |
| % John Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2009 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/blob.h" |
| #include "magick/blob-private.h" |
| #include "magick/cache.h" |
| #include "magick/color-private.h" |
| #include "magick/colorspace.h" |
| #include "magick/constitute.h" |
| #include "magick/exception.h" |
| #include "magick/exception-private.h" |
| #include "magick/geometry.h" |
| #include "magick/image.h" |
| #include "magick/image-private.h" |
| #include "magick/list.h" |
| #include "magick/magick.h" |
| #include "magick/memory_.h" |
| #include "magick/monitor.h" |
| #include "magick/monitor-private.h" |
| #include "magick/nt-feature.h" |
| #include "magick/quantum-private.h" |
| #include "magick/static.h" |
| #include "magick/string_.h" |
| #include "magick/module.h" |
| #if defined(MAGICKCORE_JBIG_DELEGATE) |
| #include "jbig.h" |
| #endif |
| |
| /* |
| Forward declarations. |
| */ |
| #if defined(MAGICKCORE_JBIG_DELEGATE) |
| static MagickBooleanType |
| WriteJBIGImage(const ImageInfo *,Image *); |
| #endif |
| |
| #if defined(MAGICKCORE_JBIG_DELEGATE) |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d J B I G I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadJBIGImage() reads a JBIG image file 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 ReadJBIGImage method is: |
| % |
| % Image *ReadJBIGImage(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 *ReadJBIGImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| IndexPacket |
| index; |
| |
| long |
| length, |
| y; |
| |
| MagickBooleanType |
| status; |
| |
| register IndexPacket |
| *indexes; |
| |
| register long |
| x; |
| |
| register PixelPacket |
| *q; |
| |
| register unsigned char |
| *p; |
| |
| ssize_t |
| count; |
| |
| struct jbg_dec_state |
| jbig_info; |
| |
| unsigned char |
| bit, |
| *buffer, |
| byte; |
| |
| /* |
| 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); |
| status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| /* |
| Initialize JBIG toolkit. |
| */ |
| jbg_dec_init(&jbig_info); |
| jbg_dec_maxsize(&jbig_info,(unsigned long) image->columns,(unsigned long) |
| image->rows); |
| image->columns=jbg_dec_getwidth(&jbig_info); |
| image->rows=jbg_dec_getheight(&jbig_info); |
| image->depth=8; |
| image->storage_class=PseudoClass; |
| image->colors=2; |
| /* |
| Read JBIG file. |
| */ |
| buffer=(unsigned char *) AcquireQuantumMemory(MagickMaxBufferExtent, |
| sizeof(*buffer)); |
| if (buffer == (unsigned char *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| status=JBG_EAGAIN; |
| do |
| { |
| length=(long) ReadBlob(image,MagickMaxBufferExtent,buffer); |
| if (length == 0) |
| break; |
| p=buffer; |
| count=0; |
| while ((length > 0) && ((status == JBG_EAGAIN) || (status == JBG_EOK))) |
| { |
| size_t |
| count; |
| |
| status=jbg_dec_in(&jbig_info,p,length,&count); |
| p+=count; |
| length-=(long) count; |
| } |
| } while ((status == JBG_EAGAIN) || (status == JBG_EOK)); |
| /* |
| Create colormap. |
| */ |
| image->columns=jbg_dec_getwidth(&jbig_info); |
| image->rows=jbg_dec_getheight(&jbig_info); |
| if (AcquireImageColormap(image,2) == MagickFalse) |
| { |
| buffer=(unsigned char *) RelinquishMagickMemory(buffer); |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| } |
| image->colormap[0].red=0; |
| image->colormap[0].green=0; |
| image->colormap[0].blue=0; |
| image->colormap[1].red=QuantumRange; |
| image->colormap[1].green=QuantumRange; |
| image->colormap[1].blue=QuantumRange; |
| image->x_resolution=300; |
| image->y_resolution=300; |
| if (image_info->ping != MagickFalse) |
| { |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| /* |
| Convert X bitmap image to pixel packets. |
| */ |
| p=jbg_dec_getimage(&jbig_info,0); |
| for (y=0; y < (long) image->rows; y++) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (PixelPacket *) NULL) |
| break; |
| indexes=GetAuthenticIndexQueue(image); |
| bit=0; |
| byte=0; |
| for (x=0; x < (long) image->columns; x++) |
| { |
| if (bit == 0) |
| byte=(*p++); |
| index=(byte & 0x80) ? 0 : 1; |
| bit++; |
| byte<<=1; |
| if (bit == 8) |
| bit=0; |
| indexes[x]=index; |
| *q++=image->colormap[(long) index]; |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| status=SetImageProgress(image,LoadImageTag,y,image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| /* |
| Free scale resource. |
| */ |
| jbg_dec_free(&jbig_info); |
| buffer=(unsigned char *) RelinquishMagickMemory(buffer); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| #endif |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r J B I G I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterJBIGImage() adds attributes for the JBIG 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 RegisterJBIGImage method is: |
| % |
| % unsigned long RegisterJBIGImage(void) |
| % |
| */ |
| ModuleExport unsigned long RegisterJBIGImage(void) |
| { |
| #define JBIGDescription "Joint Bi-level Image experts Group interchange format" |
| |
| char |
| version[MaxTextExtent]; |
| |
| MagickInfo |
| *entry; |
| |
| *version='\0'; |
| #if defined(JBG_VERSION) |
| (void) CopyMagickString(version,JBG_VERSION,MaxTextExtent); |
| #endif |
| entry=SetMagickInfo("BIE"); |
| #if defined(MAGICKCORE_JBIG_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadJBIGImage; |
| entry->encoder=(EncodeImageHandler *) WriteJBIGImage; |
| #endif |
| entry->adjoin=MagickFalse; |
| entry->description=ConstantString(JBIGDescription); |
| if (*version != '\0') |
| entry->version=ConstantString(version); |
| entry->module=ConstantString("JBIG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("JBG"); |
| #if defined(MAGICKCORE_JBIG_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadJBIGImage; |
| entry->encoder=(EncodeImageHandler *) WriteJBIGImage; |
| #endif |
| entry->description=ConstantString(JBIGDescription); |
| if (*version != '\0') |
| entry->version=ConstantString(version); |
| entry->module=ConstantString("JBIG"); |
| (void) RegisterMagickInfo(entry); |
| entry=SetMagickInfo("JBIG"); |
| #if defined(MAGICKCORE_JBIG_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadJBIGImage; |
| entry->encoder=(EncodeImageHandler *) WriteJBIGImage; |
| #endif |
| entry->description=ConstantString(JBIGDescription); |
| if (*version != '\0') |
| entry->version=ConstantString(version); |
| entry->module=ConstantString("JBIG"); |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r J B I G I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterJBIGImage() removes format registrations made by the |
| % JBIG module from the list of supported formats. |
| % |
| % The format of the UnregisterJBIGImage method is: |
| % |
| % UnregisterJBIGImage(void) |
| % |
| */ |
| ModuleExport void UnregisterJBIGImage(void) |
| { |
| (void) UnregisterMagickInfo("BIE"); |
| (void) UnregisterMagickInfo("JBG"); |
| (void) UnregisterMagickInfo("JBIG"); |
| } |
| |
| #if defined(MAGICKCORE_JBIG_DELEGATE) |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % W r i t e J B I G I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % WriteJBIGImage() writes an image in the JBIG encoded image format. |
| % |
| % The format of the WriteJBIGImage method is: |
| % |
| % MagickBooleanType WriteJBIGImage(const ImageInfo *image_info,Image *image) |
| % |
| % A description of each parameter follows. |
| % |
| % o image_info: the image info. |
| % |
| % o image: The image. |
| % |
| % |
| */ |
| |
| static void JBIGEncode(unsigned char *pixels,size_t length,void *data) |
| { |
| Image |
| *image; |
| |
| image=(Image *) data; |
| (void) WriteBlob(image,length,pixels); |
| } |
| |
| static MagickBooleanType WriteJBIGImage(const ImageInfo *image_info, |
| Image *image) |
| { |
| double |
| version; |
| |
| long |
| y; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| scene; |
| |
| register const IndexPacket |
| *indexes; |
| |
| register const PixelPacket |
| *p; |
| |
| register long |
| x; |
| |
| register unsigned char |
| *q; |
| |
| struct jbg_enc_state |
| jbig_info; |
| |
| unsigned char |
| bit, |
| byte, |
| *pixels; |
| |
| unsigned long |
| number_packets; |
| |
| /* |
| Open 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); |
| version=strtod(JBG_VERSION,(char **) NULL); |
| scene=0; |
| do |
| { |
| /* |
| Allocate pixel data. |
| */ |
| if (image->colorspace != RGBColorspace) |
| (void) TransformImageColorspace(image,RGBColorspace); |
| number_packets=(image->columns+7)/8; |
| pixels=(unsigned char *) AcquireQuantumMemory(number_packets, |
| image->rows*sizeof(*pixels)); |
| if (pixels == (unsigned char *) NULL) |
| ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| /* |
| Convert pixels to a bitmap. |
| */ |
| (void) SetImageType(image,BilevelType); |
| q=pixels; |
| for (y=0; y < (long) image->rows; y++) |
| { |
| p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception); |
| if (p == (const PixelPacket *) NULL) |
| break; |
| indexes=GetVirtualIndexQueue(image); |
| bit=0; |
| byte=0; |
| for (x=0; x < (long) image->columns; x++) |
| { |
| byte<<=1; |
| if (PixelIntensity(p) < (QuantumRange/2.0)) |
| byte|=0x01; |
| bit++; |
| if (bit == 8) |
| { |
| *q++=byte; |
| bit=0; |
| byte=0; |
| } |
| p++; |
| } |
| if (bit != 0) |
| *q++=byte << (8-bit); |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,SaveImageTag,y,image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| /* |
| Initialize JBIG info structure. |
| */ |
| jbg_enc_init(&jbig_info,image->columns,image->rows,1,&pixels, |
| (void (*)(unsigned char *,size_t,void *)) JBIGEncode,image); |
| if (image_info->scene != 0) |
| jbg_enc_layers(&jbig_info,(int) image_info->scene); |
| else |
| { |
| long |
| sans_offset; |
| |
| unsigned long |
| x_resolution, |
| y_resolution; |
| |
| x_resolution=640; |
| y_resolution=480; |
| sans_offset=0; |
| if (image_info->density != (char *) NULL) |
| { |
| GeometryInfo |
| geometry_info; |
| |
| MagickStatusType |
| flags; |
| |
| flags=ParseGeometry(image_info->density,&geometry_info); |
| x_resolution=geometry_info.rho; |
| y_resolution=geometry_info.sigma; |
| if ((flags & SigmaValue) == 0) |
| y_resolution=x_resolution; |
| } |
| if (image->units == PixelsPerCentimeterResolution) |
| { |
| x_resolution*=2.54; |
| y_resolution*=2.54; |
| } |
| (void) jbg_enc_lrlmax(&jbig_info,x_resolution,y_resolution); |
| } |
| (void) jbg_enc_lrange(&jbig_info,-1,-1); |
| jbg_enc_options(&jbig_info,JBG_ILEAVE | JBG_SMID,JBG_TPDON | JBG_TPBON | |
| JBG_DPON,version < 1.6 ? -1 : 0,-1,-1); |
| /* |
| Write JBIG image. |
| */ |
| jbg_enc_out(&jbig_info); |
| jbg_enc_free(&jbig_info); |
| pixels=(unsigned char *) RelinquishMagickMemory(pixels); |
| if (GetNextImageInList(image) == (Image *) NULL) |
| break; |
| image=SyncNextImageInList(image); |
| status=SetImageProgress(image,SaveImagesTag,scene++, |
| GetImageListLength(image)); |
| if (status == MagickFalse) |
| break; |
| } while (image_info->adjoin != MagickFalse); |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |
| #endif |