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ImageMagick-7.0.10-22 /
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Name
Size
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.deps
[ DIR ]
drwxrwxr-x
.libs
[ DIR ]
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Code Editor : sgi.c
/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % SSSSS GGGG IIIII % % SS G I % % SSS G GG I % % SS G G I % % SSSSS GGG IIIII % % % % % % Read/Write Irix RGB Image Format % % % % Software Design % % Cristy % % July 1992 % % % % % % Copyright 1999-2020 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 "MagickCore/studio.h" #include "MagickCore/attribute.h" #include "MagickCore/blob.h" #include "MagickCore/blob-private.h" #include "MagickCore/cache.h" #include "MagickCore/color.h" #include "MagickCore/color-private.h" #include "MagickCore/colormap.h" #include "MagickCore/colorspace.h" #include "MagickCore/colorspace-private.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/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/property.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" #include "MagickCore/module.h" /* Typedef declaractions. */ typedef struct _SGIInfo { unsigned short magic; unsigned char storage, bytes_per_pixel; unsigned short dimension, columns, rows, depth; size_t minimum_value, maximum_value, sans; char name[80]; size_t pixel_format; unsigned char filler[404]; } SGIInfo; /* Forward declarations. */ static MagickBooleanType WriteSGIImage(const ImageInfo *,Image *,ExceptionInfo *); /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % I s S G I % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % IsSGI() returns MagickTrue if the image format type, identified by the % magick string, is SGI. % % The format of the IsSGI method is: % % MagickBooleanType IsSGI(const unsigned char *magick,const size_t length) % % A description of each parameter follows: % % o magick: compare image format pattern against these bytes. % % o length: Specifies the length of the magick string. % */ static MagickBooleanType IsSGI(const unsigned char *magick,const size_t length) { if (length < 2) return(MagickFalse); if (memcmp(magick,"\001\332",2) == 0) return(MagickTrue); return(MagickFalse); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d S G I I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadSGIImage() reads a SGI RGB 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 ReadSGIImage method is: % % Image *ReadSGIImage(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 MagickBooleanType SGIDecode(const size_t bytes_per_pixel, ssize_t number_packets,unsigned char *packets,ssize_t number_pixels, unsigned char *pixels) { register unsigned char *p, *q; size_t pixel; ssize_t count; p=packets; q=pixels; if (bytes_per_pixel == 2) { for ( ; number_pixels > 0; ) { if (number_packets-- == 0) return(MagickFalse); pixel=(size_t) (*p++) << 8; pixel|=(*p++); count=(ssize_t) (pixel & 0x7f); if (count == 0) break; if (count > (ssize_t) number_pixels) return(MagickFalse); number_pixels-=count; if ((pixel & 0x80) != 0) for ( ; count != 0; count--) { if (number_packets-- == 0) return(MagickFalse); *q=(*p++); *(q+1)=(*p++); q+=8; } else { if (number_packets-- == 0) return(MagickFalse); pixel=(size_t) (*p++) << 8; pixel|=(*p++); for ( ; count != 0; count--) { *q=(unsigned char) (pixel >> 8); *(q+1)=(unsigned char) pixel; q+=8; } } } return(MagickTrue); } for ( ; number_pixels > 0; ) { if (number_packets-- == 0) return(MagickFalse); pixel=(size_t) (*p++); count=(ssize_t) (pixel & 0x7f); if (count == 0) break; if (count > (ssize_t) number_pixels) return(MagickFalse); number_pixels-=count; if ((pixel & 0x80) != 0) for ( ; count != 0; count--) { if (number_packets-- == 0) return(MagickFalse); *q=(*p++); q+=4; } else { if (number_packets-- == 0) return(MagickFalse); pixel=(size_t) (*p++); for ( ; count != 0; count--) { *q=(unsigned char) pixel; q+=4; } } } return(MagickTrue); } static Image *ReadSGIImage(const ImageInfo *image_info,ExceptionInfo *exception) { Image *image; MagickBooleanType status; MagickSizeType n, number_pixels; MemoryInfo *pixel_info; register Quantum *q; register ssize_t i, x; register unsigned char *p; SGIInfo iris_info; size_t bytes_per_pixel, quantum; ssize_t count, y, z; unsigned char *pixels; /* 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,exception); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } /* Read SGI raster header. */ (void) memset(&iris_info,0,sizeof(iris_info)); iris_info.magic=ReadBlobMSBShort(image); do { /* Verify SGI identifier. */ if (iris_info.magic != 0x01DA) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); iris_info.storage=(unsigned char) ReadBlobByte(image); switch (iris_info.storage) { case 0x00: image->compression=NoCompression; break; case 0x01: image->compression=RLECompression; break; default: ThrowReaderException(CorruptImageError,"ImproperImageHeader"); } iris_info.bytes_per_pixel=(unsigned char) ReadBlobByte(image); if ((iris_info.bytes_per_pixel == 0) || (iris_info.bytes_per_pixel > 2)) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); iris_info.dimension=ReadBlobMSBShort(image); if ((iris_info.dimension == 0) || (iris_info.dimension > 3)) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); iris_info.columns=ReadBlobMSBShort(image); iris_info.rows=ReadBlobMSBShort(image); iris_info.depth=ReadBlobMSBShort(image); if ((iris_info.depth == 0) || (iris_info.depth > 4)) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); iris_info.minimum_value=ReadBlobMSBLong(image); iris_info.maximum_value=ReadBlobMSBLong(image); iris_info.sans=ReadBlobMSBLong(image); count=ReadBlob(image,sizeof(iris_info.name),(unsigned char *) iris_info.name); if ((size_t) count != sizeof(iris_info.name)) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); iris_info.name[sizeof(iris_info.name)-1]='\0'; if (*iris_info.name != '\0') (void) SetImageProperty(image,"label",iris_info.name,exception); iris_info.pixel_format=ReadBlobMSBLong(image); if (iris_info.pixel_format != 0) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); count=ReadBlob(image,sizeof(iris_info.filler),iris_info.filler); if ((size_t) count != sizeof(iris_info.filler)) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); image->columns=iris_info.columns; image->rows=iris_info.rows; image->alpha_trait=iris_info.depth == 4 ? BlendPixelTrait : UndefinedPixelTrait; image->depth=(size_t) MagickMin(iris_info.depth,MAGICKCORE_QUANTUM_DEPTH); if (iris_info.pixel_format == 0) image->depth=(size_t) MagickMin((size_t) 8*iris_info.bytes_per_pixel, MAGICKCORE_QUANTUM_DEPTH); if (iris_info.depth < 3) { image->storage_class=PseudoClass; image->colors=(size_t) (iris_info.bytes_per_pixel > 1 ? 65535 : 256); } if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0)) if (image->scene >= (image_info->scene+image_info->number_scenes-1)) break; if ((MagickSizeType) (image->columns*image->rows/255) > GetBlobSize(image)) ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); status=SetImageExtent(image,image->columns,image->rows,exception); if (status != MagickFalse) status=ResetImagePixels(image,exception); if (status == MagickFalse) return(DestroyImageList(image)); /* Allocate SGI pixels. */ bytes_per_pixel=(size_t) iris_info.bytes_per_pixel; number_pixels=(MagickSizeType) iris_info.columns*iris_info.rows; if ((4*bytes_per_pixel*number_pixels) != ((MagickSizeType) (size_t) (4*bytes_per_pixel*number_pixels))) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); pixel_info=AcquireVirtualMemory(iris_info.columns,iris_info.rows*4* bytes_per_pixel*sizeof(*pixels)); if (pixel_info == (MemoryInfo *) NULL) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info); for (n=0; n < (4*bytes_per_pixel*number_pixels); n++) pixels[n]=0; if ((int) iris_info.storage != 0x01) { unsigned char *scanline; /* Read standard image format. */ scanline=(unsigned char *) AcquireQuantumMemory(iris_info.columns, bytes_per_pixel*sizeof(*scanline)); if (scanline == (unsigned char *) NULL) { pixel_info=RelinquishVirtualMemory(pixel_info); ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); } for (z=0; z < (ssize_t) iris_info.depth; z++) { p=pixels+bytes_per_pixel*z; for (y=0; y < (ssize_t) iris_info.rows; y++) { count=ReadBlob(image,bytes_per_pixel*iris_info.columns,scanline); if (count != (ssize_t) (bytes_per_pixel*iris_info.columns)) break; if (bytes_per_pixel == 2) for (x=0; x < (ssize_t) iris_info.columns; x++) { *p=scanline[2*x]; *(p+1)=scanline[2*x+1]; p+=8; } else for (x=0; x < (ssize_t) iris_info.columns; x++) { *p=scanline[x]; p+=4; } } if (y < (ssize_t) iris_info.rows) break; } scanline=(unsigned char *) RelinquishMagickMemory(scanline); } else { MemoryInfo *packet_info; size_t *runlength; ssize_t offset, *offsets; unsigned char *packets; unsigned int data_order; /* Read runlength-encoded image format. */ offsets=(ssize_t *) AcquireQuantumMemory((size_t) iris_info.rows, iris_info.depth*sizeof(*offsets)); runlength=(size_t *) AcquireQuantumMemory(iris_info.rows, iris_info.depth*sizeof(*runlength)); packet_info=AcquireVirtualMemory((size_t) iris_info.columns+10UL,4UL* sizeof(*packets)); if ((offsets == (ssize_t *) NULL) || (runlength == (size_t *) NULL) || (packet_info == (MemoryInfo *) NULL)) { offsets=(ssize_t *) RelinquishMagickMemory(offsets); runlength=(size_t *) RelinquishMagickMemory(runlength); if (packet_info != (MemoryInfo *) NULL) packet_info=RelinquishVirtualMemory(packet_info); pixel_info=RelinquishVirtualMemory(pixel_info); ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); } packets=(unsigned char *) GetVirtualMemoryBlob(packet_info); for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++) offsets[i]=(ssize_t) ReadBlobMSBSignedLong(image); for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++) { runlength[i]=ReadBlobMSBLong(image); if (runlength[i] > (4*(size_t) iris_info.columns+10)) { packet_info=RelinquishVirtualMemory(packet_info); runlength=(size_t *) RelinquishMagickMemory(runlength); offsets=(ssize_t *) RelinquishMagickMemory(offsets); pixel_info=RelinquishVirtualMemory(pixel_info); ThrowReaderException(CorruptImageError,"ImproperImageHeader"); } } /* Check data order. */ offset=0; data_order=0; for (y=0; ((y < (ssize_t) iris_info.rows) && (data_order == 0)); y++) for (z=0; ((z < (ssize_t) iris_info.depth) && (data_order == 0)); z++) { if (offsets[y+z*iris_info.rows] < offset) data_order=1; offset=offsets[y+z*iris_info.rows]; } offset=(ssize_t) TellBlob(image); if (data_order == 1) { for (z=0; z < (ssize_t) iris_info.depth; z++) { p=pixels; for (y=0; y < (ssize_t) iris_info.rows; y++) { if (offset != offsets[y+z*iris_info.rows]) { offset=offsets[y+z*iris_info.rows]; offset=(ssize_t) SeekBlob(image,(MagickOffsetType) offset, SEEK_SET); } count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows], packets); if (count != (ssize_t) runlength[y+z*iris_info.rows]) break; offset+=(ssize_t) runlength[y+z*iris_info.rows]; status=SGIDecode(bytes_per_pixel,(ssize_t) (runlength[y+z*iris_info.rows]/bytes_per_pixel),packets, (ssize_t) iris_info.columns,p+bytes_per_pixel*z); if (status == MagickFalse) { packet_info=RelinquishVirtualMemory(packet_info); runlength=(size_t *) RelinquishMagickMemory(runlength); offsets=(ssize_t *) RelinquishMagickMemory(offsets); pixel_info=RelinquishVirtualMemory(pixel_info); ThrowReaderException(CorruptImageError, "ImproperImageHeader"); } p+=(iris_info.columns*4*bytes_per_pixel); } if (y < (ssize_t) iris_info.rows) break; } } else { MagickOffsetType position; position=TellBlob(image); p=pixels; for (y=0; y < (ssize_t) iris_info.rows; y++) { for (z=0; z < (ssize_t) iris_info.depth; z++) { if (offset != offsets[y+z*iris_info.rows]) { offset=offsets[y+z*iris_info.rows]; offset=(ssize_t) SeekBlob(image,(MagickOffsetType) offset, SEEK_SET); } count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows], packets); if (count != (ssize_t) runlength[y+z*iris_info.rows]) break; offset+=(ssize_t) runlength[y+z*iris_info.rows]; status=SGIDecode(bytes_per_pixel,(ssize_t) (runlength[y+z*iris_info.rows]/bytes_per_pixel),packets, (ssize_t) iris_info.columns,p+bytes_per_pixel*z); if (status == MagickFalse) { packet_info=RelinquishVirtualMemory(packet_info); runlength=(size_t *) RelinquishMagickMemory(runlength); offsets=(ssize_t *) RelinquishMagickMemory(offsets); pixel_info=RelinquishVirtualMemory(pixel_info); ThrowReaderException(CorruptImageError, "ImproperImageHeader"); } } if (z < (ssize_t) iris_info.depth) break; p+=(iris_info.columns*4*bytes_per_pixel); } offset=(ssize_t) SeekBlob(image,position,SEEK_SET); } packet_info=RelinquishVirtualMemory(packet_info); runlength=(size_t *) RelinquishMagickMemory(runlength); offsets=(ssize_t *) RelinquishMagickMemory(offsets); } /* Convert SGI raster image to pixel packets. */ if (image->storage_class == DirectClass) { /* Convert SGI image to DirectClass pixel packets. */ if (bytes_per_pixel == 2) { for (y=0; y < (ssize_t) image->rows; y++) { p=pixels+(image->rows-y-1)*8*image->columns; q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { SetPixelRed(image,ScaleShortToQuantum((unsigned short) ((*(p+0) << 8) | (*(p+1)))),q); SetPixelGreen(image,ScaleShortToQuantum((unsigned short) ((*(p+2) << 8) | (*(p+3)))),q); SetPixelBlue(image,ScaleShortToQuantum((unsigned short) ((*(p+4) << 8) | (*(p+5)))),q); SetPixelAlpha(image,OpaqueAlpha,q); if (image->alpha_trait != UndefinedPixelTrait) SetPixelAlpha(image,ScaleShortToQuantum((unsigned short) ((*(p+6) << 8) | (*(p+7)))),q); p+=8; q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; if (image->previous == (Image *) NULL) { status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows); if (status == MagickFalse) break; } } } else for (y=0; y < (ssize_t) image->rows; y++) { p=pixels+(image->rows-y-1)*4*image->columns; q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { SetPixelRed(image,ScaleCharToQuantum(*p),q); SetPixelGreen(image,ScaleCharToQuantum(*(p+1)),q); SetPixelBlue(image,ScaleCharToQuantum(*(p+2)),q); SetPixelAlpha(image,OpaqueAlpha,q); if (image->alpha_trait != UndefinedPixelTrait) SetPixelAlpha(image,ScaleCharToQuantum(*(p+3)),q); p+=4; q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; if (image->previous == (Image *) NULL) { status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } } } else { /* Create grayscale map. */ if (AcquireImageColormap(image,image->colors,exception) == MagickFalse) { pixel_info=RelinquishVirtualMemory(pixel_info); ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); } /* Convert SGI image to PseudoClass pixel packets. */ if (bytes_per_pixel == 2) { for (y=0; y < (ssize_t) image->rows; y++) { p=pixels+(image->rows-y-1)*8*image->columns; q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { quantum=(*p << 8); quantum|=(*(p+1)); SetPixelIndex(image,(Quantum) quantum,q); p+=8; q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; if (image->previous == (Image *) NULL) { status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows); if (status == MagickFalse) break; } } } else for (y=0; y < (ssize_t) image->rows; y++) { p=pixels+(image->rows-y-1)*4*image->columns; q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { SetPixelIndex(image,*p,q); p+=4; q+=GetPixelChannels(image); } if (SyncAuthenticPixels(image,exception) == MagickFalse) break; if (image->previous == (Image *) NULL) { status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } } (void) SyncImage(image,exception); } pixel_info=RelinquishVirtualMemory(pixel_info); if (EOFBlob(image) != MagickFalse) { ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); break; } /* Proceed to next image. */ if (image_info->number_scenes != 0) if (image->scene >= (image_info->scene+image_info->number_scenes-1)) break; iris_info.magic=ReadBlobMSBShort(image); if (iris_info.magic == 0x01DA) { /* Allocate next image structure. */ AcquireNextImage(image_info,image,exception); if (GetNextImageInList(image) == (Image *) NULL) { status=MagickFalse; break; } image=SyncNextImageInList(image); status=SetImageProgress(image,LoadImagesTag,TellBlob(image), GetBlobSize(image)); if (status == MagickFalse) break; } } while (iris_info.magic == 0x01DA); (void) CloseBlob(image); if (status == MagickFalse) return(DestroyImageList(image)); return(GetFirstImageInList(image)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r S G I I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterSGIImage() adds properties for the SGI image format to % the list of supported formats. The properties 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 RegisterSGIImage method is: % % size_t RegisterSGIImage(void) % */ ModuleExport size_t RegisterSGIImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("SGI","SGI","Irix RGB image"); entry->decoder=(DecodeImageHandler *) ReadSGIImage; entry->encoder=(EncodeImageHandler *) WriteSGIImage; entry->magick=(IsImageFormatHandler *) IsSGI; entry->flags|=CoderDecoderSeekableStreamFlag; (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r S G I I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterSGIImage() removes format registrations made by the % SGI module from the list of supported formats. % % The format of the UnregisterSGIImage method is: % % UnregisterSGIImage(void) % */ ModuleExport void UnregisterSGIImage(void) { (void) UnregisterMagickInfo("SGI"); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % W r i t e S G I I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % WriteSGIImage() writes an image in SGI RGB encoded image format. % % The format of the WriteSGIImage method is: % % MagickBooleanType WriteSGIImage(const ImageInfo *image_info, % Image *image,ExceptionInfo *exception) % % A description of each parameter follows. % % o image_info: the image info. % % o image: The image. % % o exception: return any errors or warnings in this structure. % */ static size_t SGIEncode(unsigned char *pixels,size_t length, unsigned char *packets) { short runlength; register unsigned char *p, *q; unsigned char *limit, *mark; p=pixels; limit=p+length*4; q=packets; while (p < limit) { mark=p; p+=8; while ((p < limit) && ((*(p-8) != *(p-4)) || (*(p-4) != *p))) p+=4; p-=8; length=(size_t) (p-mark) >> 2; while (length != 0) { runlength=(short) (length > 126 ? 126 : length); length-=runlength; *q++=(unsigned char) (0x80 | runlength); for ( ; runlength > 0; runlength--) { *q++=(*mark); mark+=4; } } mark=p; p+=4; while ((p < limit) && (*p == *mark)) p+=4; length=(size_t) (p-mark) >> 2; while (length != 0) { runlength=(short) (length > 126 ? 126 : length); length-=runlength; *q++=(unsigned char) runlength; *q++=(*mark); } } *q++='\0'; return((size_t) (q-packets)); } static MagickBooleanType WriteSGIImage(const ImageInfo *image_info,Image *image, ExceptionInfo *exception) { CompressionType compression; const char *value; MagickBooleanType status; MagickOffsetType scene; MagickSizeType number_pixels; MemoryInfo *pixel_info; SGIInfo iris_info; register const Quantum *p; register ssize_t i, x; register unsigned char *q; size_t imageListLength; ssize_t y, z; unsigned char *pixels, *packets; /* Open output image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickCoreSignature); assert(image != (Image *) NULL); assert(image->signature == MagickCoreSignature); if (image->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickCoreSignature); status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); if (status == MagickFalse) return(status); scene=0; imageListLength=GetImageListLength(image); do { /* Initialize SGI raster file header. */ if ((image->columns > 65535UL) || (image->rows > 65535UL)) ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit"); (void) TransformImageColorspace(image,sRGBColorspace,exception); (void) memset(&iris_info,0,sizeof(iris_info)); iris_info.magic=0x01DA; compression=image->compression; if (image_info->compression != UndefinedCompression) compression=image_info->compression; if (image->depth > 8) compression=NoCompression; if (compression == NoCompression) iris_info.storage=(unsigned char) 0x00; else iris_info.storage=(unsigned char) 0x01; iris_info.bytes_per_pixel=(unsigned char) (image->depth > 8 ? 2 : 1); iris_info.dimension=3; iris_info.columns=(unsigned short) image->columns; iris_info.rows=(unsigned short) image->rows; if (image->alpha_trait != UndefinedPixelTrait) iris_info.depth=4; else { if ((image_info->type != TrueColorType) && (SetImageGray(image,exception) != MagickFalse)) { iris_info.dimension=2; iris_info.depth=1; } else iris_info.depth=3; } iris_info.minimum_value=0; iris_info.maximum_value=(size_t) (image->depth <= 8 ? 1UL*ScaleQuantumToChar(QuantumRange) : 1UL*ScaleQuantumToShort(QuantumRange)); /* Write SGI header. */ (void) WriteBlobMSBShort(image,iris_info.magic); (void) WriteBlobByte(image,iris_info.storage); (void) WriteBlobByte(image,iris_info.bytes_per_pixel); (void) WriteBlobMSBShort(image,iris_info.dimension); (void) WriteBlobMSBShort(image,iris_info.columns); (void) WriteBlobMSBShort(image,iris_info.rows); (void) WriteBlobMSBShort(image,iris_info.depth); (void) WriteBlobMSBLong(image,(unsigned int) iris_info.minimum_value); (void) WriteBlobMSBLong(image,(unsigned int) iris_info.maximum_value); (void) WriteBlobMSBLong(image,(unsigned int) iris_info.sans); value=GetImageProperty(image,"label",exception); if (value != (const char *) NULL) (void) CopyMagickString(iris_info.name,value,sizeof(iris_info.name)); (void) WriteBlob(image,sizeof(iris_info.name),(unsigned char *) iris_info.name); (void) WriteBlobMSBLong(image,(unsigned int) iris_info.pixel_format); (void) WriteBlob(image,sizeof(iris_info.filler),iris_info.filler); /* Allocate SGI pixels. */ number_pixels=(MagickSizeType) image->columns*image->rows; if ((4*iris_info.bytes_per_pixel*number_pixels) != ((MagickSizeType) (size_t) (4*iris_info.bytes_per_pixel*number_pixels))) ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); pixel_info=AcquireVirtualMemory((size_t) number_pixels,4* iris_info.bytes_per_pixel*sizeof(*pixels)); if (pixel_info == (MemoryInfo *) NULL) ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info); /* Convert image pixels to uncompressed SGI pixels. */ for (y=0; y < (ssize_t) image->rows; y++) { p=GetVirtualPixels(image,0,y,image->columns,1,exception); if (p == (const Quantum *) NULL) break; if (image->depth <= 8) for (x=0; x < (ssize_t) image->columns; x++) { register unsigned char *q; q=(unsigned char *) pixels; q+=((iris_info.rows-1)-y)*(4*iris_info.columns)+4*x; *q++=ScaleQuantumToChar(GetPixelRed(image,p)); *q++=ScaleQuantumToChar(GetPixelGreen(image,p)); *q++=ScaleQuantumToChar(GetPixelBlue(image,p)); *q++=ScaleQuantumToChar(GetPixelAlpha(image,p)); p+=GetPixelChannels(image); } else for (x=0; x < (ssize_t) image->columns; x++) { register unsigned short *q; q=(unsigned short *) pixels; q+=((iris_info.rows-1)-y)*(4*iris_info.columns)+4*x; *q++=ScaleQuantumToShort(GetPixelRed(image,p)); *q++=ScaleQuantumToShort(GetPixelGreen(image,p)); *q++=ScaleQuantumToShort(GetPixelBlue(image,p)); *q++=ScaleQuantumToShort(GetPixelAlpha(image,p)); p+=GetPixelChannels(image); } if (image->previous == (Image *) NULL) { status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, image->rows); if (status == MagickFalse) break; } } switch (compression) { case NoCompression: { /* Write uncompressed SGI pixels. */ for (z=0; z < (ssize_t) iris_info.depth; z++) { for (y=0; y < (ssize_t) iris_info.rows; y++) { if (image->depth <= 8) for (x=0; x < (ssize_t) iris_info.columns; x++) { register unsigned char *q; q=(unsigned char *) pixels; q+=y*(4*iris_info.columns)+4*x+z; (void) WriteBlobByte(image,*q); } else for (x=0; x < (ssize_t) iris_info.columns; x++) { register unsigned short *q; q=(unsigned short *) pixels; q+=y*(4*iris_info.columns)+4*x+z; (void) WriteBlobMSBShort(image,*q); } } } break; } default: { MemoryInfo *packet_info; size_t length, number_packets, *runlength; ssize_t offset, *offsets; /* Convert SGI uncompressed pixels. */ offsets=(ssize_t *) AcquireQuantumMemory(iris_info.rows, iris_info.depth*sizeof(*offsets)); runlength=(size_t *) AcquireQuantumMemory(iris_info.rows, iris_info.depth*sizeof(*runlength)); packet_info=AcquireVirtualMemory((2*(size_t) iris_info.columns+10)* image->rows,4*sizeof(*packets)); if ((offsets == (ssize_t *) NULL) || (runlength == (size_t *) NULL) || (packet_info == (MemoryInfo *) NULL)) { if (offsets != (ssize_t *) NULL) offsets=(ssize_t *) RelinquishMagickMemory(offsets); if (runlength != (size_t *) NULL) runlength=(size_t *) RelinquishMagickMemory(runlength); if (packet_info != (MemoryInfo *) NULL) packet_info=RelinquishVirtualMemory(packet_info); pixel_info=RelinquishVirtualMemory(pixel_info); ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); } packets=(unsigned char *) GetVirtualMemoryBlob(packet_info); offset=512+4*2*((ssize_t) iris_info.rows*iris_info.depth); number_packets=0; q=pixels; for (y=0; y < (ssize_t) iris_info.rows; y++) { for (z=0; z < (ssize_t) iris_info.depth; z++) { length=SGIEncode(q+z,(size_t) iris_info.columns,packets+ number_packets); number_packets+=length; offsets[y+z*iris_info.rows]=offset; runlength[y+z*iris_info.rows]=(size_t) length; offset+=(ssize_t) length; } q+=(iris_info.columns*4); } /* Write out line start and length tables and runlength-encoded pixels. */ for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++) (void) WriteBlobMSBLong(image,(unsigned int) offsets[i]); for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++) (void) WriteBlobMSBLong(image,(unsigned int) runlength[i]); (void) WriteBlob(image,number_packets,packets); /* Relinquish resources. */ offsets=(ssize_t *) RelinquishMagickMemory(offsets); runlength=(size_t *) RelinquishMagickMemory(runlength); packet_info=RelinquishVirtualMemory(packet_info); break; } } pixel_info=RelinquishVirtualMemory(pixel_info); if (GetNextImageInList(image) == (Image *) NULL) break; image=SyncNextImageInList(image); status=SetImageProgress(image,SaveImagesTag,scene++,imageListLength); if (status == MagickFalse) break; } while (image_info->adjoin != MagickFalse); (void) CloseBlob(image); return(MagickTrue); }
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