| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % RRRR L EEEEE % |
| % R R L E % |
| % RRRR L EEE % |
| % R R L E % |
| % R R LLLLL EEEEE % |
| % % |
| % % |
| % Read URT RLE 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/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/cache.h" |
| #include "MagickCore/colormap.h" |
| #include "MagickCore/colormap-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/pixel.h" |
| #include "MagickCore/property.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/module.h" |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % I s R L E % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % IsRLE() returns MagickTrue if the image format type, identified by the |
| % magick string, is RLE. |
| % |
| % The format of the ReadRLEImage method is: |
| % |
| % MagickBooleanType IsRLE(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 IsRLE(const unsigned char *magick,const size_t length) |
| { |
| if (length < 2) |
| return(MagickFalse); |
| if (memcmp(magick,"\122\314",2) == 0) |
| return(MagickTrue); |
| return(MagickFalse); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d R L E I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadRLEImage() reads a run-length encoded Utah Raster Toolkit |
| % 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 ReadRLEImage method is: |
| % |
| % Image *ReadRLEImage(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 *ReadRLEImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| #define SkipLinesOp 0x01 |
| #define SetColorOp 0x02 |
| #define SkipPixelsOp 0x03 |
| #define ByteDataOp 0x05 |
| #define RunDataOp 0x06 |
| #define EOFOp 0x07 |
| #define ThrowRLEException(exception,message) \ |
| { \ |
| if (colormap != (unsigned char *) NULL) \ |
| colormap=(unsigned char *) RelinquishMagickMemory(colormap); \ |
| if (pixel_info != (MemoryInfo *) NULL) \ |
| pixel_info=RelinquishVirtualMemory(pixel_info); \ |
| ThrowReaderException((exception),(message)); \ |
| } |
| |
| char |
| magick[12]; |
| |
| Image |
| *image; |
| |
| int |
| opcode, |
| operand, |
| status; |
| |
| MagickStatusType |
| flags; |
| |
| MagickSizeType |
| number_pixels; |
| |
| MemoryInfo |
| *pixel_info; |
| |
| Quantum |
| index; |
| |
| register ssize_t |
| x; |
| |
| register Quantum |
| *q; |
| |
| register ssize_t |
| i; |
| |
| register unsigned char |
| *p; |
| |
| size_t |
| bits_per_pixel, |
| map_length, |
| number_colormaps, |
| number_planes, |
| number_planes_filled, |
| one, |
| pixel_info_length; |
| |
| ssize_t |
| count, |
| offset, |
| y; |
| |
| unsigned char |
| background_color[256], |
| *colormap, |
| pixel, |
| plane, |
| *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) |
| return(DestroyImageList(image)); |
| /* |
| Determine if this a RLE file. |
| */ |
| colormap=(unsigned char *) NULL; |
| pixel_info=(MemoryInfo *) NULL; |
| count=ReadBlob(image,2,(unsigned char *) magick); |
| if ((count != 2) || (memcmp(magick,"\122\314",2) != 0)) |
| ThrowRLEException(CorruptImageError,"ImproperImageHeader"); |
| do |
| { |
| /* |
| Read image header. |
| */ |
| image->page.x=(ssize_t) ReadBlobLSBShort(image); |
| image->page.y=(ssize_t) ReadBlobLSBShort(image); |
| image->columns=ReadBlobLSBShort(image); |
| image->rows=ReadBlobLSBShort(image); |
| flags=(MagickStatusType) ReadBlobByte(image); |
| image->alpha_trait=flags & 0x04 ? BlendPixelTrait : UndefinedPixelTrait; |
| number_planes=(size_t) ReadBlobByte(image); |
| bits_per_pixel=(size_t) ReadBlobByte(image); |
| number_colormaps=(size_t) ReadBlobByte(image); |
| map_length=(unsigned char) ReadBlobByte(image); |
| if (map_length >= 22) |
| ThrowRLEException(CorruptImageError,"ImproperImageHeader"); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| one=1; |
| map_length=one << map_length; |
| if ((number_planes == 0) || (number_planes == 2) || ((flags & 0x04) && |
| ((number_planes <= 2) || number_planes > 254)) || (bits_per_pixel != 8)) |
| ThrowRLEException(CorruptImageError,"ImproperImageHeader"); |
| if (number_planes > 4) |
| ThrowRLEException(CorruptImageError,"ImproperImageHeader"); |
| if ((image->columns == 0) || (image->columns >= 32768) || |
| (image->rows == 0) || (image->rows >= 32768)) |
| ThrowRLEException(CorruptImageError,"ImproperImageHeader"); |
| if (flags & 0x02) |
| { |
| /* |
| No background color-- initialize to black. |
| */ |
| for (i=0; i < (ssize_t) number_planes; i++) |
| background_color[i]=0; |
| (void) ReadBlobByte(image); |
| } |
| else |
| { |
| /* |
| Initialize background color. |
| */ |
| p=background_color; |
| for (i=0; i < (ssize_t) number_planes; i++) |
| *p++=(unsigned char) ReadBlobByte(image); |
| } |
| if ((number_planes & 0x01) == 0) |
| (void) ReadBlobByte(image); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| if (image->alpha_trait != UndefinedPixelTrait) |
| number_planes++; |
| number_pixels=(MagickSizeType) image->columns*image->rows; |
| if ((GetBlobSize(image) == 0) || ((((MagickSizeType) number_pixels* |
| number_planes*bits_per_pixel/8)/GetBlobSize(image)) > 254)) |
| ThrowRLEException(CorruptImageError,"InsufficientImageDataInFile") |
| if (((MagickSizeType) number_colormaps*map_length) > GetBlobSize(image)) |
| ThrowRLEException(CorruptImageError,"InsufficientImageDataInFile") |
| if (number_colormaps != 0) |
| { |
| /* |
| Read image colormaps. |
| */ |
| colormap=(unsigned char *) AcquireQuantumMemory(number_colormaps, |
| 3*map_length*sizeof(*colormap)); |
| if (colormap == (unsigned char *) NULL) |
| ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed"); |
| (void) memset(colormap,0,number_colormaps*3*map_length* |
| sizeof(*colormap)); |
| p=colormap; |
| for (i=0; i < (ssize_t) number_colormaps; i++) |
| for (x=0; x < (ssize_t) map_length; x++) |
| { |
| *p++=(unsigned char) ScaleQuantumToChar(ScaleShortToQuantum( |
| ReadBlobLSBShort(image))); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } |
| } |
| if ((flags & 0x08) != 0) |
| { |
| char |
| *comment; |
| |
| size_t |
| length; |
| |
| /* |
| Read image comment. |
| */ |
| length=ReadBlobLSBShort(image); |
| if (length != 0) |
| { |
| comment=(char *) AcquireQuantumMemory(length,sizeof(*comment)); |
| if (comment == (char *) NULL) |
| ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed"); |
| count=ReadBlob(image,length-1,(unsigned char *) comment); |
| if (count != (ssize_t) (length-1)) |
| { |
| comment=DestroyString(comment); |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } |
| comment[length-1]='\0'; |
| (void) SetImageProperty(image,"comment",comment,exception); |
| comment=DestroyString(comment); |
| if ((length & 0x01) == 0) |
| (void) ReadBlobByte(image); |
| } |
| } |
| if (EOFBlob(image) != MagickFalse) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| 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) |
| { |
| if (colormap != (unsigned char *) NULL) |
| colormap=(unsigned char *) RelinquishMagickMemory(colormap); |
| if (pixel_info != (MemoryInfo *) NULL) |
| pixel_info=RelinquishVirtualMemory(pixel_info); |
| return(DestroyImageList(image)); |
| } |
| /* |
| Allocate RLE pixels. |
| */ |
| number_planes_filled=(number_planes % 2 == 0) ? number_planes : |
| number_planes+1; |
| if ((number_pixels*number_planes_filled) != (size_t) (number_pixels* |
| number_planes_filled)) |
| ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed"); |
| pixel_info=AcquireVirtualMemory(image->columns,image->rows* |
| MagickMax(number_planes_filled,4)*sizeof(*pixels)); |
| if (pixel_info == (MemoryInfo *) NULL) |
| ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed"); |
| pixel_info_length=image->columns*image->rows* |
| MagickMax(number_planes_filled,4); |
| pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info); |
| (void) memset(pixels,0,pixel_info_length); |
| if ((flags & 0x01) && !(flags & 0x02)) |
| { |
| ssize_t |
| j; |
| |
| /* |
| Set background color. |
| */ |
| p=pixels; |
| for (i=0; i < (ssize_t) number_pixels; i++) |
| { |
| if (image->alpha_trait == UndefinedPixelTrait) |
| for (j=0; j < (ssize_t) number_planes; j++) |
| *p++=background_color[j]; |
| else |
| { |
| for (j=0; j < (ssize_t) (number_planes-1); j++) |
| *p++=background_color[j]; |
| *p++=0; /* initialize matte channel */ |
| } |
| } |
| } |
| /* |
| Read runlength-encoded image. |
| */ |
| plane=0; |
| x=0; |
| y=0; |
| opcode=ReadBlobByte(image); |
| if (opcode == EOF) |
| { |
| if (number_colormaps != 0) |
| colormap=(unsigned char *) RelinquishMagickMemory(colormap); |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } |
| do |
| { |
| switch (opcode & 0x3f) |
| { |
| case SkipLinesOp: |
| { |
| operand=ReadBlobByte(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| if (opcode & 0x40) |
| { |
| operand=ReadBlobLSBSignedShort(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } |
| x=0; |
| y+=operand; |
| break; |
| } |
| case SetColorOp: |
| { |
| operand=ReadBlobByte(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| plane=(unsigned char) operand; |
| if (plane == 255) |
| plane=(unsigned char) (number_planes-1); |
| x=0; |
| break; |
| } |
| case SkipPixelsOp: |
| { |
| operand=ReadBlobByte(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| if (opcode & 0x40) |
| { |
| operand=ReadBlobLSBSignedShort(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } |
| x+=operand; |
| break; |
| } |
| case ByteDataOp: |
| { |
| operand=ReadBlobByte(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| if (opcode & 0x40) |
| { |
| operand=ReadBlobLSBSignedShort(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } |
| offset=(ssize_t) (((image->rows-y-1)*image->columns*number_planes)+x* |
| number_planes+plane); |
| operand++; |
| if ((offset < 0) || |
| ((size_t) (offset+operand*number_planes) > pixel_info_length)) |
| ThrowRLEException(CorruptImageError,"UnableToReadImageData"); |
| p=pixels+offset; |
| for (i=0; i < (ssize_t) operand; i++) |
| { |
| pixel=(unsigned char) ReadBlobByte(image); |
| if ((y < (ssize_t) image->rows) && |
| ((x+i) < (ssize_t) image->columns)) |
| *p=pixel; |
| p+=number_planes; |
| } |
| if (operand & 0x01) |
| (void) ReadBlobByte(image); |
| x+=operand; |
| break; |
| } |
| case RunDataOp: |
| { |
| operand=ReadBlobByte(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| if (opcode & 0x40) |
| { |
| operand=ReadBlobLSBSignedShort(image); |
| if (operand == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } |
| pixel=(unsigned char) ReadBlobByte(image); |
| (void) ReadBlobByte(image); |
| offset=(ssize_t) (((image->rows-y-1)*image->columns*number_planes)+x* |
| number_planes+plane); |
| operand++; |
| if ((offset < 0) || |
| ((size_t) (offset+operand*number_planes) > pixel_info_length)) |
| ThrowRLEException(CorruptImageError,"UnableToReadImageData"); |
| p=pixels+offset; |
| for (i=0; i < (ssize_t) operand; i++) |
| { |
| if ((y < (ssize_t) image->rows) && |
| ((x+i) < (ssize_t) image->columns)) |
| *p=pixel; |
| p+=number_planes; |
| } |
| x+=operand; |
| break; |
| } |
| default: |
| break; |
| } |
| opcode=ReadBlobByte(image); |
| if (opcode == EOF) |
| ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile"); |
| } while (((opcode & 0x3f) != EOFOp) && (opcode != EOF)); |
| if (number_colormaps != 0) |
| { |
| MagickStatusType |
| mask; |
| |
| /* |
| Apply colormap affineation to image. |
| */ |
| mask=(MagickStatusType) (map_length-1); |
| p=pixels; |
| x=(ssize_t) number_planes; |
| if (number_colormaps == 1) |
| for (i=0; i < (ssize_t) number_pixels; i++) |
| { |
| ValidateColormapValue(image,(ssize_t) (*p & mask),&index,exception); |
| *p=colormap[(ssize_t) index]; |
| p++; |
| } |
| else |
| if ((number_planes >= 3) && (number_colormaps >= 3)) |
| for (i=0; i < (ssize_t) number_pixels; i++) |
| for (x=0; x < (ssize_t) number_planes; x++) |
| { |
| ValidateColormapValue(image,(ssize_t) (x*map_length+ |
| (*p & mask)),&index,exception); |
| *p=colormap[(ssize_t) index]; |
| p++; |
| } |
| if ((i < (ssize_t) number_pixels) || (x < (ssize_t) number_planes)) |
| ThrowRLEException(CorruptImageError,"UnableToReadImageData"); |
| } |
| /* |
| Initialize image structure. |
| */ |
| if (number_planes >= 3) |
| { |
| /* |
| Convert raster image to DirectClass pixel packets. |
| */ |
| p=pixels; |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| 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++),q); |
| SetPixelBlue(image,ScaleCharToQuantum(*p++),q); |
| if (image->alpha_trait != UndefinedPixelTrait) |
| SetPixelAlpha(image,ScaleCharToQuantum(*p++),q); |
| 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 colormap. |
| */ |
| if (number_colormaps == 0) |
| map_length=256; |
| if (AcquireImageColormap(image,map_length,exception) == MagickFalse) |
| ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed"); |
| p=colormap; |
| if (number_colormaps == 1) |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| /* |
| Pseudocolor. |
| */ |
| image->colormap[i].red=(MagickRealType) |
| ScaleCharToQuantum((unsigned char) i); |
| image->colormap[i].green=(MagickRealType) |
| ScaleCharToQuantum((unsigned char) i); |
| image->colormap[i].blue=(MagickRealType) |
| ScaleCharToQuantum((unsigned char) i); |
| } |
| else |
| if (number_colormaps > 1) |
| for (i=0; i < (ssize_t) image->colors; i++) |
| { |
| image->colormap[i].red=(MagickRealType) |
| ScaleCharToQuantum(*p); |
| image->colormap[i].green=(MagickRealType) |
| ScaleCharToQuantum(*(p+map_length)); |
| image->colormap[i].blue=(MagickRealType) |
| ScaleCharToQuantum(*(p+map_length*2)); |
| p++; |
| } |
| p=pixels; |
| if (image->alpha_trait == UndefinedPixelTrait) |
| { |
| /* |
| Convert raster image to PseudoClass pixel packets. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| 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,(Quantum) *p++,q); |
| 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); |
| } |
| else |
| { |
| /* |
| Image has a matte channel-- promote to DirectClass. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| ValidateColormapValue(image,(ssize_t) *p++,&index,exception); |
| SetPixelRed(image,ClampToQuantum(image->colormap[(ssize_t) |
| index].red),q); |
| ValidateColormapValue(image,(ssize_t) *p++,&index,exception); |
| SetPixelGreen(image,ClampToQuantum(image->colormap[(ssize_t) |
| index].green),q); |
| ValidateColormapValue(image,(ssize_t) *p++,&index,exception); |
| SetPixelBlue(image,ClampToQuantum(image->colormap[(ssize_t) |
| index].blue),q); |
| SetPixelAlpha(image,ScaleCharToQuantum(*p++),q); |
| q+=GetPixelChannels(image); |
| } |
| if (x < (ssize_t) image->columns) |
| break; |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| if (image->previous == (Image *) NULL) |
| { |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) |
| y,image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| } |
| image->colormap=(PixelInfo *) RelinquishMagickMemory( |
| image->colormap); |
| image->storage_class=DirectClass; |
| image->colors=0; |
| } |
| } |
| if (number_colormaps != 0) |
| colormap=(unsigned char *) RelinquishMagickMemory(colormap); |
| 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; |
| (void) ReadBlobByte(image); |
| count=ReadBlob(image,2,(unsigned char *) magick); |
| if ((count != 0) && (memcmp(magick,"\122\314",2) == 0)) |
| { |
| /* |
| 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 ((count != 0) && (memcmp(magick,"\122\314",2) == 0)); |
| (void) CloseBlob(image); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r R L E I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterRLEImage() adds attributes for the RLE 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 RegisterRLEImage method is: |
| % |
| % size_t RegisterRLEImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterRLEImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("RLE","RLE","Utah Run length encoded image"); |
| entry->decoder=(DecodeImageHandler *) ReadRLEImage; |
| entry->magick=(IsImageFormatHandler *) IsRLE; |
| entry->flags|=CoderDecoderSeekableStreamFlag; |
| entry->flags^=CoderAdjoinFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r R L E I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterRLEImage() removes format registrations made by the |
| % RLE module from the list of supported formats. |
| % |
| % The format of the UnregisterRLEImage method is: |
| % |
| % UnregisterRLEImage(void) |
| % |
| */ |
| ModuleExport void UnregisterRLEImage(void) |
| { |
| (void) UnregisterMagickInfo("RLE"); |
| } |
