| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % 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 1999-2016 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/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 |
| { |
| pixel=(size_t) (*p++) << 8; |
| pixel|=(*p++); |
| for ( ; count != 0; count--) |
| { |
| if (number_packets-- == 0) |
| return(MagickFalse); |
| *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 |
| 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. |
| */ |
| 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); |
| 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); |
| (void) ReadBlob(image,sizeof(iris_info.name),(unsigned char *) |
| iris_info.name); |
| 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); |
| (void) count; |
| image->columns=iris_info.columns; |
| image->rows=iris_info.rows; |
| 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=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; |
| status=SetImageExtent(image,image->columns,image->rows,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); |
| 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) |
| 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 (EOFBlob(image) != MagickFalse) |
| 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; |
| } |
| } |
| } |
| 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)) |
| { |
| 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); |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| } |
| packets=(unsigned char *) GetVirtualMemoryBlob(packet_info); |
| for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++) |
| offsets[i]=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)) |
| 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,(ssize_t) offset,SEEK_SET); |
| } |
| count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows], |
| packets); |
| if (EOFBlob(image) != MagickFalse) |
| 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, |
| 1L*iris_info.columns,p+bytes_per_pixel*z); |
| if (status == MagickFalse) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| p+=(iris_info.columns*4*bytes_per_pixel); |
| } |
| } |
| } |
| 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,(ssize_t) offset,SEEK_SET); |
| } |
| count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows], |
| packets); |
| if (EOFBlob(image) != MagickFalse) |
| 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, |
| 1L*iris_info.columns,p+bytes_per_pixel*z); |
| if (status == MagickFalse) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| } |
| 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); |
| } |
| /* |
| Initialize image structure. |
| */ |
| image->alpha_trait=iris_info.depth == 4 ? BlendPixelTrait : |
| UndefinedPixelTrait; |
| image->columns=iris_info.columns; |
| image->rows=iris_info.rows; |
| /* |
| 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) |
| 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) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| image=SyncNextImageInList(image); |
| status=SetImageProgress(image,LoadImagesTag,TellBlob(image), |
| GetBlobSize(image)); |
| if (status == MagickFalse) |
| break; |
| } |
| } while (iris_info.magic == 0x01DA); |
| (void) CloseBlob(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|=CoderSeekableStreamFlag; |
| (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; |
| |
| 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); |
| if ((image->columns > 65535UL) || (image->rows > 65535UL)) |
| ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit"); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); |
| if (status == MagickFalse) |
| return(status); |
| scene=0; |
| do |
| { |
| /* |
| Initialize SGI raster file header. |
| */ |
| (void) TransformImageColorspace(image,sRGBColorspace,exception); |
| (void) ResetMagickMemory(&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); |
| 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++, |
| GetImageListLength(image)); |
| if (status == MagickFalse) |
| break; |
| } while (image_info->adjoin != MagickFalse); |
| (void) CloseBlob(image); |
| return(MagickTrue); |
| } |
