| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % % |
| % M M AAA CCCC % |
| % MM MM A A C % |
| % M M M AAAAA C % |
| % M M A A C % |
| % M M A A CCCC % |
| % % |
| % % |
| % Read MacPaint Image Format % |
| % % |
| % Software Design % |
| % Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2019 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/colorspace.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 M A C I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadMACImage() reads an MacPaint 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 ReadMACImage method is: |
| % |
| % Image *ReadMACImage(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 *ReadMACImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| register Quantum |
| *q; |
| |
| register ssize_t |
| x; |
| |
| register unsigned char |
| *p; |
| |
| size_t |
| length; |
| |
| ssize_t |
| offset, |
| y; |
| |
| unsigned char |
| count, |
| bit, |
| byte, |
| *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 MAC X image. |
| */ |
| length=ReadBlobLSBShort(image); |
| if ((length & 0xff) != 0) |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| for (x=0; x < (ssize_t) 638; x++) |
| if (ReadBlobByte(image) == EOF) |
| ThrowReaderException(CorruptImageError,"CorruptImage"); |
| image->columns=576; |
| image->rows=720; |
| image->depth=1; |
| if (AcquireImageColormap(image,2,exception) == MagickFalse) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| 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)); |
| status=ResetImagePixels(image,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| /* |
| Convert MAC raster image to pixel packets. |
| */ |
| length=(image->columns+7)/8; |
| pixels=(unsigned char *) AcquireQuantumMemory(length+1,sizeof(*pixels)); |
| if (pixels == (unsigned char *) NULL) |
| ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| p=pixels; |
| offset=0; |
| for (y=0; y < (ssize_t) image->rows; ) |
| { |
| count=(unsigned char) ReadBlobByte(image); |
| if (EOFBlob(image) != MagickFalse) |
| break; |
| if ((count <= 0) || (count >= 128)) |
| { |
| byte=(unsigned char) (~ReadBlobByte(image)); |
| count=(~count)+2; |
| while (count != 0) |
| { |
| *p++=byte; |
| offset++; |
| count--; |
| if (offset >= (ssize_t) length) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| p=pixels; |
| bit=0; |
| byte=0; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| if (bit == 0) |
| byte=(*p++); |
| SetPixelIndex(image,((byte & 0x80) != 0 ? 0x01 : 0x00),q); |
| bit++; |
| byte<<=1; |
| if (bit == 8) |
| bit=0; |
| q+=GetPixelChannels(image); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| offset=0; |
| p=pixels; |
| y++; |
| } |
| } |
| continue; |
| } |
| count++; |
| while (count != 0) |
| { |
| byte=(unsigned char) (~ReadBlobByte(image)); |
| *p++=byte; |
| offset++; |
| count--; |
| if (offset >= (ssize_t) length) |
| { |
| q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| if (q == (Quantum *) NULL) |
| break; |
| p=pixels; |
| bit=0; |
| byte=0; |
| for (x=0; x < (ssize_t) image->columns; x++) |
| { |
| if (bit == 0) |
| byte=(*p++); |
| SetPixelIndex(image,((byte & 0x80) != 0 ? 0x01 : 0x00),q); |
| bit++; |
| byte<<=1; |
| if (bit == 8) |
| bit=0; |
| q+=GetPixelChannels(image); |
| } |
| if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| break; |
| offset=0; |
| p=pixels; |
| y++; |
| } |
| } |
| } |
| pixels=(unsigned char *) RelinquishMagickMemory(pixels); |
| (void) SyncImage(image,exception); |
| (void) CloseBlob(image); |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r M A C I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterMACImage() adds attributes for the MAC X 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 RegisterMACImage method is: |
| % |
| % size_t RegisterMACImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterMACImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("MAC","MAC","MAC Paint"); |
| entry->decoder=(DecodeImageHandler *) ReadMACImage; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r M A C I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterMACImage() removes format registrations made by the |
| % MAC module from the list of supported formats. |
| % |
| % The format of the UnregisterMACImage method is: |
| % |
| % UnregisterMACImage(void) |
| % |
| */ |
| ModuleExport void UnregisterMACImage(void) |
| { |
| (void) UnregisterMagickInfo("MAC"); |
| } |
