/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % CCC U U TTTTT % % C U U T % % C U U T % % C U U T % % CCC UUU T % % % % % % Read DR Halo Image Format % % % % Software Design % % Jaroslav Fojtik % % June 2000 % % % % % % Permission is hereby granted, free of charge, to any person obtaining a % % copy of this software and associated documentation files ("ImageMagick"), % % to deal in ImageMagick without restriction, including without limitation % % the rights to use, copy, modify, merge, publish, distribute, sublicense, % % and/or sell copies of ImageMagick, and to permit persons to whom the % % ImageMagick is furnished to do so, subject to the following conditions: % % % % The above copyright notice and this permission notice shall be included in % % all copies or substantial portions of ImageMagick. % % % % The software is provided "as is", without warranty of any kind, express or % % implied, including but not limited to the warranties of merchantability, % % fitness for a particular purpose and noninfringement. In no event shall % % ImageMagick Studio be liable for any claim, damages or other liability, % % whether in an action of contract, tort or otherwise, arising from, out of % % or in connection with ImageMagick or the use or other dealings in % % ImageMagick. % % % % Except as contained in this notice, the name of the ImageMagick Studio % % shall not be used in advertising or otherwise to promote the sale, use or % % other dealings in ImageMagick without prior written authorization from the % % ImageMagick Studio. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % */ /* 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/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/pixel-accessor.h" #include "magick/quantum-private.h" #include "magick/static.h" #include "magick/string_.h" #include "magick/module.h" #include "magick/utility.h" #include "magick/utility-private.h" typedef struct { unsigned Width; unsigned Height; unsigned Reserved; } CUTHeader; typedef struct { char FileId[2]; unsigned Version; unsigned Size; char FileType; char SubType; unsigned BoardID; unsigned GraphicsMode; unsigned MaxIndex; unsigned MaxRed; unsigned MaxGreen; unsigned MaxBlue; char PaletteId[20]; } CUTPalHeader; static MagickBooleanType InsertRow(int bpp,unsigned char *p,ssize_t y, Image *image) { ExceptionInfo *exception; int bit; ssize_t x; PixelPacket *q; IndexPacket index; IndexPacket *indexes; exception=(&image->exception); q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (PixelPacket *) NULL) return(MagickFalse); indexes=GetAuthenticIndexQueue(image); switch (bpp) { case 1: /* Convert bitmap scanline. */ { for (x=0; x < ((ssize_t) image->columns-7); x+=8) { for (bit=0; bit < 8; bit++) { index=((*p) & (0x80 >> bit) ? 0x01 : 0x00); SetPixelIndex(indexes+x+bit,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; } p++; } if ((image->columns % 8) != 0) { for (bit=0; bit < (ssize_t) (image->columns % 8); bit++) { index=((*p) & (0x80 >> bit) ? 0x01 : 0x00); SetPixelIndex(indexes+x+bit,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; } p++; } break; } case 2: /* Convert PseudoColor scanline. */ { if ((image->storage_class != PseudoClass) || (indexes == (IndexPacket *) NULL)) break; for (x=0; x < ((ssize_t) image->columns-3); x+=4) { index=ConstrainColormapIndex(image,(*p >> 6) & 0x3); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; index=ConstrainColormapIndex(image,(*p >> 4) & 0x3); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; index=ConstrainColormapIndex(image,(*p >> 2) & 0x3); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; index=ConstrainColormapIndex(image,(*p) & 0x3); SetPixelIndex(indexes+x+1,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; p++; } if ((image->columns % 4) != 0) { index=ConstrainColormapIndex(image,(*p >> 6) & 0x3); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; if ((image->columns % 4) > 1) { index=ConstrainColormapIndex(image,(*p >> 4) & 0x3); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; if ((image->columns % 4) > 2) { index=ConstrainColormapIndex(image,(*p >> 2) & 0x3); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; } } p++; } break; } case 4: /* Convert PseudoColor scanline. */ { for (x=0; x < ((ssize_t) image->columns-1); x+=2) { index=ConstrainColormapIndex(image,(*p >> 4) & 0x0f); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); q++; index=ConstrainColormapIndex(image,(*p) & 0x0f); SetPixelIndex(indexes+x+1,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); p++; q++; } if ((image->columns % 2) != 0) { index=ConstrainColormapIndex(image,(*p >> 4) & 0x0f); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); p++; q++; } break; } case 8: /* Convert PseudoColor scanline. */ { for (x=0; x < (ssize_t) image->columns; x++) { index=ConstrainColormapIndex(image,*p); SetPixelIndex(indexes+x,index); if (index < image->colors) SetPixelRGBO(q,image->colormap+(ssize_t) index); p++; q++; } } break; case 24: /* Convert DirectColor scanline. */ for (x=0; x < (ssize_t) image->columns; x++) { SetPixelRed(q,ScaleCharToQuantum(*p++)); SetPixelGreen(q,ScaleCharToQuantum(*p++)); SetPixelBlue(q,ScaleCharToQuantum(*p++)); q++; } break; } if (!SyncAuthenticPixels(image,exception)) return(MagickFalse); return(MagickTrue); } /* Compute the number of colors in Grayed R[i]=G[i]=B[i] image */ static int GetCutColors(Image *image) { ExceptionInfo *exception; Quantum intensity, scale_intensity; PixelPacket *q; ssize_t x, y; exception=(&image->exception); intensity=0; scale_intensity=ScaleCharToQuantum(16); for (y=0; y < (ssize_t) image->rows; y++) { q=GetAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (PixelPacket *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { if (intensity < GetPixelRed(q)) intensity=GetPixelRed(q); if (intensity >= scale_intensity) return(255); q++; } } if (intensity < ScaleCharToQuantum(2)) return(2); if (intensity < ScaleCharToQuantum(16)) return(16); return((int) intensity); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d C U T I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadCUTImage() reads an CUT X 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 ReadCUTImage method is: % % Image *ReadCUTImage(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 *ReadCUTImage(const ImageInfo *image_info,ExceptionInfo *exception) { #define ThrowCUTReaderException(severity,tag) \ { \ if (palette != NULL) \ palette=DestroyImage(palette); \ if (clone_info != NULL) \ clone_info=DestroyImageInfo(clone_info); \ ThrowReaderException(severity,tag); \ } Image *image,*palette; ImageInfo *clone_info; MagickBooleanType status; MagickOffsetType offset; size_t EncodedByte; unsigned char RunCount,RunValue,RunCountMasked; CUTHeader Header; CUTPalHeader PalHeader; ssize_t depth; ssize_t i,j; ssize_t ldblk; unsigned char *BImgBuff=NULL,*ptrB; PixelPacket *q; /* Open image file. */ 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); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } /* Read CUT image. */ palette=NULL; clone_info=NULL; Header.Width=ReadBlobLSBShort(image); Header.Height=ReadBlobLSBShort(image); Header.Reserved=ReadBlobLSBShort(image); if (Header.Width==0 || Header.Height==0 || Header.Reserved!=0) CUT_KO: ThrowCUTReaderException(CorruptImageError,"ImproperImageHeader"); /*---This code checks first line of image---*/ EncodedByte=ReadBlobLSBShort(image); RunCount=(unsigned char) ReadBlobByte(image); RunCountMasked=RunCount & 0x7F; ldblk=0; while((int) RunCountMasked!=0) /*end of line?*/ { i=1; if((int) RunCount<0x80) i=(ssize_t) RunCountMasked; offset=SeekBlob(image,TellBlob(image)+i,SEEK_SET); if (offset < 0) ThrowCUTReaderException(CorruptImageError,"ImproperImageHeader"); if(EOFBlob(image) != MagickFalse) goto CUT_KO; /*wrong data*/ EncodedByte-=i+1; ldblk+=(ssize_t) RunCountMasked; RunCount=(unsigned char) ReadBlobByte(image); if(EOFBlob(image) != MagickFalse) goto CUT_KO; /*wrong data: unexpected eof in line*/ RunCountMasked=RunCount & 0x7F; } if(EncodedByte!=1) goto CUT_KO; /*wrong data: size incorrect*/ i=0; /*guess a number of bit planes*/ if(ldblk==(int) Header.Width) i=8; if(2*ldblk==(int) Header.Width) i=4; if(8*ldblk==(int) Header.Width) i=1; if(i==0) goto CUT_KO; /*wrong data: incorrect bit planes*/ depth=i; image->columns=Header.Width; image->rows=Header.Height; image->depth=8; image->colors=(size_t) (GetQuantumRange(1UL*i)+1); if (image_info->ping != MagickFalse) goto Finish; status=SetImageExtent(image,image->columns,image->rows); if (status == MagickFalse) { InheritException(exception,&image->exception); return(DestroyImageList(image)); } /* ----- Do something with palette ----- */ if ((clone_info=CloneImageInfo(image_info)) == NULL) goto NoPalette; i=(ssize_t) strlen(clone_info->filename); j=i; while(--i>0) { if(clone_info->filename[i]=='.') { break; } if(clone_info->filename[i]=='/' || clone_info->filename[i]=='\\' || clone_info->filename[i]==':' ) { i=j; break; } } (void) CopyMagickString(clone_info->filename+i,".PAL",(size_t) (MaxTextExtent-i)); if((clone_info->file=fopen_utf8(clone_info->filename,"rb"))==NULL) { (void) CopyMagickString(clone_info->filename+i,".pal",(size_t) (MaxTextExtent-i)); if((clone_info->file=fopen_utf8(clone_info->filename,"rb"))==NULL) { clone_info->filename[i]='\0'; if((clone_info->file=fopen_utf8(clone_info->filename,"rb"))==NULL) { clone_info=DestroyImageInfo(clone_info); clone_info=NULL; goto NoPalette; } } } if( (palette=AcquireImage(clone_info))==NULL ) goto NoPalette; status=OpenBlob(clone_info,palette,ReadBinaryBlobMode,exception); if (status == MagickFalse) { ErasePalette: palette=DestroyImage(palette); palette=NULL; goto NoPalette; } if(palette!=NULL) { (void) ReadBlob(palette,2,(unsigned char *) PalHeader.FileId); if(strncmp(PalHeader.FileId,"AH",2) != 0) goto ErasePalette; PalHeader.Version=ReadBlobLSBShort(palette); PalHeader.Size=ReadBlobLSBShort(palette); PalHeader.FileType=(char) ReadBlobByte(palette); PalHeader.SubType=(char) ReadBlobByte(palette); PalHeader.BoardID=ReadBlobLSBShort(palette); PalHeader.GraphicsMode=ReadBlobLSBShort(palette); PalHeader.MaxIndex=ReadBlobLSBShort(palette); PalHeader.MaxRed=ReadBlobLSBShort(palette); PalHeader.MaxGreen=ReadBlobLSBShort(palette); PalHeader.MaxBlue=ReadBlobLSBShort(palette); (void) ReadBlob(palette,20,(unsigned char *) PalHeader.PaletteId); if (EOFBlob(image)) ThrowCUTReaderException(CorruptImageError,"UnexpectedEndOfFile"); if(PalHeader.MaxIndex<1) goto ErasePalette; image->colors=PalHeader.MaxIndex+1; if (AcquireImageColormap(image,image->colors) == MagickFalse) goto NoMemory; if(PalHeader.MaxRed==0) PalHeader.MaxRed=(unsigned int) QuantumRange; /*avoid division by 0*/ if(PalHeader.MaxGreen==0) PalHeader.MaxGreen=(unsigned int) QuantumRange; if(PalHeader.MaxBlue==0) PalHeader.MaxBlue=(unsigned int) QuantumRange; for(i=0;i<=(int) PalHeader.MaxIndex;i++) { /*this may be wrong- I don't know why is palette such strange*/ j=(ssize_t) TellBlob(palette); if((j % 512)>512-6) { j=((j / 512)+1)*512; offset=SeekBlob(palette,j,SEEK_SET); if (offset < 0) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); } image->colormap[i].red=(Quantum) ReadBlobLSBShort(palette); if (QuantumRange != (Quantum) PalHeader.MaxRed) { image->colormap[i].red=ClampToQuantum(((double) image->colormap[i].red*QuantumRange+(PalHeader.MaxRed>>1))/ PalHeader.MaxRed); } image->colormap[i].green=(Quantum) ReadBlobLSBShort(palette); if (QuantumRange != (Quantum) PalHeader.MaxGreen) { image->colormap[i].green=ClampToQuantum (((double) image->colormap[i].green*QuantumRange+(PalHeader.MaxGreen>>1))/PalHeader.MaxGreen); } image->colormap[i].blue=(Quantum) ReadBlobLSBShort(palette); if (QuantumRange != (Quantum) PalHeader.MaxBlue) { image->colormap[i].blue=ClampToQuantum (((double)image->colormap[i].blue*QuantumRange+(PalHeader.MaxBlue>>1))/PalHeader.MaxBlue); } } if (EOFBlob(image)) ThrowCUTReaderException(CorruptImageError,"UnexpectedEndOfFile"); } NoPalette: if(palette==NULL) { image->colors=256; if (AcquireImageColormap(image,image->colors) == MagickFalse) { NoMemory: ThrowCUTReaderException(ResourceLimitError,"MemoryAllocationFailed"); } for (i=0; i < (ssize_t)image->colors; i++) { image->colormap[i].red=ScaleCharToQuantum((unsigned char) i); image->colormap[i].green=ScaleCharToQuantum((unsigned char) i); image->colormap[i].blue=ScaleCharToQuantum((unsigned char) i); } } /* ----- Load RLE compressed raster ----- */ BImgBuff=(unsigned char *) AcquireQuantumMemory((size_t) ldblk, sizeof(*BImgBuff)); /*Ldblk was set in the check phase*/ if(BImgBuff==NULL) goto NoMemory; (void) memset(BImgBuff,0,(size_t) ldblk*sizeof(*BImgBuff)); offset=SeekBlob(image,6 /*sizeof(Header)*/,SEEK_SET); if (offset < 0) { if (palette != NULL) palette=DestroyImage(palette); if (clone_info != NULL) clone_info=DestroyImageInfo(clone_info); BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff); ThrowReaderException(CorruptImageError,"ImproperImageHeader"); } for (i=0; i < (int) Header.Height; i++) { EncodedByte=ReadBlobLSBShort(image); ptrB=BImgBuff; j=ldblk; RunCount=(unsigned char) ReadBlobByte(image); RunCountMasked=RunCount & 0x7F; while ((int) RunCountMasked != 0) { if((ssize_t) RunCountMasked>j) { /*Wrong Data*/ RunCountMasked=(unsigned char) j; if(j==0) { break; } } if((int) RunCount>0x80) { RunValue=(unsigned char) ReadBlobByte(image); (void) memset(ptrB,(int) RunValue,(size_t) RunCountMasked); } else { (void) ReadBlob(image,(size_t) RunCountMasked,ptrB); } ptrB+=(int) RunCountMasked; j-=(int) RunCountMasked; if (EOFBlob(image) != MagickFalse) goto Finish; /* wrong data: unexpected eof in line */ RunCount=(unsigned char) ReadBlobByte(image); RunCountMasked=RunCount & 0x7F; } InsertRow(depth,BImgBuff,i,image); } (void) SyncImage(image); /*detect monochrome image*/ if(palette==NULL) { /*attempt to detect binary (black&white) images*/ if ((image->storage_class == PseudoClass) && (SetImageGray(image,&image->exception) != MagickFalse)) { if(GetCutColors(image)==2) { for (i=0; i < (ssize_t)image->colors; i++) { Quantum sample; sample=ScaleCharToQuantum((unsigned char) i); if(image->colormap[i].red!=sample) goto Finish; if(image->colormap[i].green!=sample) goto Finish; if(image->colormap[i].blue!=sample) goto Finish; } image->colormap[1].red=image->colormap[1].green= image->colormap[1].blue=QuantumRange; for (i=0; i < (ssize_t)image->rows; i++) { q=QueueAuthenticPixels(image,0,i,image->columns,1,exception); if (q == (PixelPacket *) NULL) break; for (j=0; j < (ssize_t)image->columns; j++) { if (GetPixelRed(q) == ScaleCharToQuantum(1)) { SetPixelRed(q,QuantumRange); SetPixelGreen(q,QuantumRange); SetPixelBlue(q,QuantumRange); } q++; } if (SyncAuthenticPixels(image,exception) == MagickFalse) goto Finish; } } } } Finish: if (BImgBuff != NULL) BImgBuff=(unsigned char *) RelinquishMagickMemory(BImgBuff); if (palette != NULL) palette=DestroyImage(palette); if (clone_info != NULL) clone_info=DestroyImageInfo(clone_info); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); (void) CloseBlob(image); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r C U T I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterCUTImage() adds attributes for the CUT 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 RegisterCUTImage method is: % % size_t RegisterCUTImage(void) % */ ModuleExport size_t RegisterCUTImage(void) { MagickInfo *entry; entry=SetMagickInfo("CUT"); entry->decoder=(DecodeImageHandler *) ReadCUTImage; entry->seekable_stream=MagickTrue; entry->description=ConstantString("DR Halo"); entry->magick_module=ConstantString("CUT"); (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r C U T I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterCUTImage() removes format registrations made by the % CUT module from the list of supported formats. % % The format of the UnregisterCUTImage method is: % % UnregisterCUTImage(void) % */ ModuleExport void UnregisterCUTImage(void) { (void) UnregisterMagickInfo("CUT"); }