| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % RRRR L AAA % |
| % R R L A A % |
| % RRRR L AAAAA % |
| % R R L A A % |
| % R R LLLLL A A % |
| % % |
| % % |
| % Read Alias/Wavefront 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/property.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/cache.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/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/module.h" |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d R L A I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadRLAImage() reads a run-length encoded Wavefront RLA image file |
| % and returns it. It allocates the memory necessary for the new Image |
| % structure and returns a pointer to the new image. |
| % |
| % Note: This module was contributed by Lester Vecsey (master@internexus.net). |
| % |
| % The format of the ReadRLAImage method is: |
| % |
| % Image *ReadRLAImage(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 *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| typedef struct _WindowFrame |
| { |
| short |
| left, |
| right, |
| bottom, |
| top; |
| } WindowFrame; |
| |
| typedef struct _RLAInfo |
| { |
| WindowFrame |
| window, |
| active_window; |
| |
| short |
| frame, |
| storage_type, |
| number_channels, |
| number_matte_channels, |
| number_auxiliary_channels, |
| revision; |
| |
| char |
| gamma[16+1], |
| red_primary[24+1], |
| green_primary[24+1], |
| blue_primary[24+1], |
| white_point[24+1]; |
| |
| int |
| job_number; |
| |
| char |
| name[128+1], |
| description[128+1], |
| program[64+1], |
| machine[32+1], |
| user[32+1], |
| date[20+1], |
| aspect[24+1], |
| aspect_ratio[8+1], |
| chan[32+1]; |
| |
| short |
| field; |
| |
| char |
| time[12], |
| filter[32]; |
| |
| short |
| bits_per_channel, |
| matte_type, |
| matte_bits, |
| auxiliary_type, |
| auxiliary_bits; |
| |
| char |
| auxiliary[32+1], |
| space[36+1]; |
| |
| int |
| next; |
| } RLAInfo; |
| |
| Image |
| *image; |
| |
| int |
| channel, |
| length, |
| runlength; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| offset, |
| *scanlines; |
| |
| register ssize_t |
| i, |
| x; |
| |
| register Quantum |
| *q; |
| |
| ssize_t |
| count, |
| y; |
| |
| RLAInfo |
| rla_info; |
| |
| unsigned char |
| byte; |
| |
| /* |
| 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); |
| } |
| (void) memset(&rla_info,0,sizeof(rla_info)); |
| rla_info.window.left=(short) ReadBlobMSBShort(image); |
| rla_info.window.right=(short) ReadBlobMSBShort(image); |
| rla_info.window.bottom=(short) ReadBlobMSBShort(image); |
| rla_info.window.top=(short) ReadBlobMSBShort(image); |
| rla_info.active_window.left=(short) ReadBlobMSBShort(image); |
| rla_info.active_window.right=(short) ReadBlobMSBShort(image); |
| rla_info.active_window.bottom=(short) ReadBlobMSBShort(image); |
| rla_info.active_window.top=(short) ReadBlobMSBShort(image); |
| rla_info.frame=(short) ReadBlobMSBShort(image); |
| rla_info.storage_type=(short) ReadBlobMSBShort(image); |
| rla_info.number_channels=(short) ReadBlobMSBShort(image); |
| if (rla_info.number_channels < 0) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| rla_info.number_matte_channels=(short) ReadBlobMSBShort(image); |
| if (rla_info.number_matte_channels < 0) |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| if ((rla_info.number_channels > 3) || (rla_info.number_matte_channels > 3)) |
| ThrowReaderException(CoderError,"Unsupported number of channels"); |
| if (rla_info.number_channels == 0) |
| rla_info.number_channels=3; |
| rla_info.number_channels+=rla_info.number_matte_channels; |
| rla_info.number_auxiliary_channels=(short) ReadBlobMSBShort(image); |
| rla_info.revision=(short) ReadBlobMSBShort(image); |
| (void) ReadBlob(image,16,(unsigned char *) rla_info.gamma); |
| (void) ReadBlob(image,24,(unsigned char *) rla_info.red_primary); |
| (void) ReadBlob(image,24,(unsigned char *) rla_info.green_primary); |
| (void) ReadBlob(image,24,(unsigned char *) rla_info.blue_primary); |
| (void) ReadBlob(image,24,(unsigned char *) rla_info.white_point); |
| rla_info.job_number=ReadBlobMSBSignedLong(image); |
| (void) ReadBlob(image,128,(unsigned char *) rla_info.name); |
| (void) ReadBlob(image,128,(unsigned char *) rla_info.description); |
| rla_info.description[127]='\0'; |
| (void) ReadBlob(image,64,(unsigned char *) rla_info.program); |
| (void) ReadBlob(image,32,(unsigned char *) rla_info.machine); |
| (void) ReadBlob(image,32,(unsigned char *) rla_info.user); |
| (void) ReadBlob(image,20,(unsigned char *) rla_info.date); |
| (void) ReadBlob(image,24,(unsigned char *) rla_info.aspect); |
| (void) ReadBlob(image,8,(unsigned char *) rla_info.aspect_ratio); |
| (void) ReadBlob(image,32,(unsigned char *) rla_info.chan); |
| rla_info.field=(short) ReadBlobMSBShort(image); |
| (void) ReadBlob(image,12,(unsigned char *) rla_info.time); |
| (void) ReadBlob(image,32,(unsigned char *) rla_info.filter); |
| rla_info.bits_per_channel=(short) ReadBlobMSBShort(image); |
| rla_info.matte_type=(short) ReadBlobMSBShort(image); |
| rla_info.matte_bits=(short) ReadBlobMSBShort(image); |
| rla_info.auxiliary_type=(short) ReadBlobMSBShort(image); |
| rla_info.auxiliary_bits=(short) ReadBlobMSBShort(image); |
| (void) ReadBlob(image,32,(unsigned char *) rla_info.auxiliary); |
| count=ReadBlob(image,36,(unsigned char *) rla_info.space); |
| if ((size_t) count != 36) |
| ThrowReaderException(CorruptImageError,"UnableToReadImageData"); |
| rla_info.next=ReadBlobMSBSignedLong(image); |
| /* |
| Initialize image structure. |
| */ |
| image->alpha_trait=rla_info.number_matte_channels != 0 ? BlendPixelTrait : |
| UndefinedPixelTrait; |
| image->columns=(size_t) (rla_info.active_window.right- |
| rla_info.active_window.left+1); |
| image->rows=(size_t) (rla_info.active_window.top- |
| rla_info.active_window.bottom+1); |
| if (image_info->ping != MagickFalse) |
| { |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| scanlines=(MagickOffsetType *) AcquireQuantumMemory(image->rows, |
| sizeof(*scanlines)); |
| if (scanlines == (MagickOffsetType *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| if (*rla_info.description != '\0') |
| (void) SetImageProperty(image,"comment",rla_info.description,exception); |
| /* |
| Read offsets to each scanline data. |
| */ |
| for (i=0; i < (ssize_t) image->rows; i++) |
| scanlines[i]=(MagickOffsetType) ReadBlobMSBSignedLong(image); |
| if (EOFBlob(image) != MagickFalse) |
| { |
| scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines); |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| } |
| /* |
| Read image data. |
| */ |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| offset=SeekBlob(image,scanlines[image->rows-y-1],SEEK_SET); |
| if (offset < 0) |
| { |
| scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines); |
| ThrowReaderException(CorruptImageError,"ImproperImageHeader"); |
| } |
| x=0; |
| for (channel=0; channel < (int) rla_info.number_channels; channel++) |
| { |
| length=ReadBlobMSBSignedShort(image); |
| while (length > 0) |
| { |
| byte=(unsigned char) ReadBlobByte(image); |
| runlength=byte; |
| if (byte > 127) |
| runlength=byte-256; |
| length--; |
| if (length == 0) |
| break; |
| if (runlength < 0) |
| { |
| while (runlength < 0) |
| { |
| q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),y,1,1, |
| exception); |
| if (q == (Quantum *) NULL) |
| break; |
| byte=(unsigned char) ReadBlobByte(image); |
| length--; |
| switch (channel) |
| { |
| case 0: |
| { |
| SetPixelRed(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| case 1: |
| { |
| SetPixelGreen(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| case 2: |
| { |
| SetPixelBlue(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| case 3: |
| default: |
| { |
| SetPixelAlpha(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| x++; |
| runlength++; |
| } |
| continue; |
| } |
| byte=(unsigned char) ReadBlobByte(image); |
| length--; |
| runlength++; |
| do |
| { |
| q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),y,1,1, |
| exception); |
| if (q == (Quantum *) NULL) |
| break; |
| switch (channel) |
| { |
| case 0: |
| { |
| SetPixelRed(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| case 1: |
| { |
| SetPixelGreen(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| case 2: |
| { |
| SetPixelBlue(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| case 3: |
| default: |
| { |
| SetPixelAlpha(image,ScaleCharToQuantum(byte),q); |
| break; |
| } |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| x++; |
| runlength--; |
| } |
| while (runlength > 0); |
| } |
| } |
| if ((x/(ssize_t) rla_info.number_channels) > (ssize_t) image->columns) |
| { |
| scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines); |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| } |
| if (EOFBlob(image) != MagickFalse) |
| break; |
| status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, |
| image->rows); |
| if (status == MagickFalse) |
| break; |
| } |
| scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines); |
| if (EOFBlob(image) != MagickFalse) |
| ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| image->filename); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r R L A I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterRLAImage() adds attributes for the RLA 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 RegisterRLAImage method is: |
| % |
| % size_t RegisterRLAImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterRLAImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("RLA","RLA","Alias/Wavefront image"); |
| entry->decoder=(DecodeImageHandler *) ReadRLAImage; |
| entry->flags^=CoderAdjoinFlag; |
| entry->flags|=CoderDecoderSeekableStreamFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r R L A I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterRLAImage() removes format registrations made by the |
| % RLA module from the list of supported formats. |
| % |
| % The format of the UnregisterRLAImage method is: |
| % |
| % UnregisterRLAImage(void) |
| % |
| */ |
| ModuleExport void UnregisterRLAImage(void) |
| { |
| (void) UnregisterMagickInfo("RLA"); |
| } |
