| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % OOO RRRR AAA % |
| % O O R R A A % |
| % O O RRRR AAAAA % |
| % O O R R A A % |
| % OOO R R A A % |
| % % |
| % % |
| % Read OpenRaster (.ora) files % |
| % % |
| % OpenRaster spec: % |
| % https://www.freedesktop.org/wiki/Specifications/OpenRaster/ % |
| % % |
| % Implementer % |
| % Christopher Chianelli % |
| % August 2020 % |
| % % |
| % % |
| % Copyright 1999-2021 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/constitute.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/module.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/resource_.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/utility.h" |
| |
| #if defined(MAGICKCORE_ZIP_DELEGATE) |
| #include <zip.h> |
| #endif |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d O R A I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadORAImage reads an ORA file in the most basic way possible: by |
| % reading it as a ZIP File and extracting the mergedimage.png file from it, |
| % which is then passed to ReadPNGImage. |
| % |
| % https://www.freedesktop.org/wiki/Specifications/OpenRaster/Draft/FileLayout/ |
| % |
| % The format of the ReadORAImage method is: |
| % |
| % Image *ReadORAImage(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. |
| % |
| */ |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| extern "C" { |
| #endif |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| } |
| #endif |
| |
| #if defined(MAGICKCORE_PNG_DELEGATE) && defined(MAGICKCORE_ZIP_DELEGATE) |
| static Image *ReadORAImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| char |
| image_data_buffer[8192]; |
| |
| const char |
| *MERGED_IMAGE_PATH = "mergedimage.png"; |
| |
| FILE |
| *file; |
| |
| Image |
| *image_metadata, |
| *out_image; |
| |
| ImageInfo |
| *read_info; |
| |
| int |
| unique_file, |
| zip_error; |
| |
| MagickBooleanType |
| status; |
| |
| struct stat |
| stat_info; |
| |
| zip_t |
| *zip_archive; |
| |
| zip_file_t |
| *merged_image_file; |
| |
| zip_uint64_t |
| read_bytes, |
| offset; |
| |
| image_metadata=AcquireImage(image_info,exception); |
| read_info=CloneImageInfo(image_info); |
| SetImageInfoBlob(read_info,(void *) NULL,0); |
| stat(image_info->filename,&stat_info); |
| zip_archive=zip_open(image_info->filename,ZIP_RDONLY,&zip_error); |
| if (zip_archive == NULL) |
| { |
| ThrowFileException(exception,FileOpenError,"UnableToOpenFile", |
| image_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| image_metadata=DestroyImage(image_metadata); |
| return((Image *) NULL); |
| } |
| merged_image_file=zip_fopen(zip_archive,MERGED_IMAGE_PATH,ZIP_FL_UNCHANGED); |
| if (merged_image_file == NULL) |
| { |
| ThrowFileException(exception,FileOpenError,"UnableToOpenFile", |
| image_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| image_metadata=DestroyImage(image_metadata); |
| zip_discard(zip_archive); |
| return((Image *) NULL); |
| } |
| /* Get a temporary file to write the mergedimage.png of the ZIP to */ |
| (void) CopyMagickString(read_info->magick,"PNG",MagickPathExtent); |
| unique_file=AcquireUniqueFileResource(read_info->unique); |
| (void) CopyMagickString(read_info->filename,read_info->unique, |
| MagickPathExtent); |
| file=(FILE *) NULL; |
| if (unique_file != -1) |
| file=fdopen(unique_file,"wb"); |
| if ((unique_file == -1) || (file == (FILE *) NULL)) |
| { |
| ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile", |
| read_info->filename); |
| if (unique_file != -1) |
| (void) RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| image_metadata=DestroyImage(image_metadata); |
| zip_fclose(merged_image_file); |
| zip_discard(zip_archive); |
| return((Image *) NULL); |
| } |
| /* Write the uncompressed mergedimage.png to the temporary file */ |
| status=MagickTrue; |
| offset=0; |
| while (status != MagickFalse) |
| { |
| read_bytes=zip_fread(merged_image_file,image_data_buffer+offset, |
| sizeof(image_data_buffer)-offset); |
| if (read_bytes == -1) |
| status=MagickFalse; |
| else if (read_bytes == 0) |
| { |
| /* Write up to offset of image_data_buffer to temp file */ |
| if (!fwrite(image_data_buffer,offset,1,file)) |
| status=MagickFalse; |
| break; |
| } |
| else if (read_bytes == sizeof(image_data_buffer)-offset) |
| { |
| /* Write the entirely of image_data_buffer to temp file */ |
| if (!fwrite(image_data_buffer,sizeof(image_data_buffer),1,file)) |
| status=MagickFalse; |
| else |
| offset=0; |
| } |
| else |
| offset+=read_bytes; |
| } |
| (void) fclose(file); |
| (void) zip_fclose(merged_image_file); |
| (void) zip_discard(zip_archive); |
| if (status == MagickFalse) |
| { |
| ThrowFileException(exception,CoderError,"UnableToReadImageData", |
| read_info->filename); |
| (void) RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| image_metadata=DestroyImage(image_metadata); |
| return((Image *) NULL); |
| } |
| /* Delegate to ReadImage to read mergedimage.png */ |
| out_image=ReadImage(read_info,exception); |
| (void) RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| /* Update fields of image from fields of png_image */ |
| if (out_image != NULL) |
| { |
| (void) CopyMagickString(out_image->filename,image_metadata->filename, |
| MagickPathExtent); |
| (void) CopyMagickString(out_image->magick_filename, |
| image_metadata->magick_filename,MagickPathExtent); |
| out_image->timestamp=time(&stat_info.st_mtime); |
| (void) CopyMagickString(out_image->magick,image_metadata->magick, |
| MagickPathExtent); |
| out_image->extent=stat_info.st_size; |
| } |
| image_metadata=DestroyImage(image_metadata); |
| return(out_image); |
| } |
| #endif /* MAGICKCORE_ZIP_DELEGATE && MAGICKCORE_PNG_DELEGATE */ |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r O R A I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterORAImage() adds attributes for the ORA 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 RegisterORAImage method is: |
| % |
| % size_t RegisterORAImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterORAImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("ORA","ORA","OpenRaster format"); |
| |
| #if defined(MAGICKCORE_ZIP_DELEGATE) && defined(MAGICKCORE_PNG_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadORAImage; |
| #endif |
| entry->flags^=CoderBlobSupportFlag; |
| entry->flags|=CoderDecoderSeekableStreamFlag; |
| entry->format_type=ExplicitFormatType; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r O R A I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterORAImage() removes format registrations made by the |
| % ORA module from the list of supported formats. |
| % |
| % The format of the UnregisterORAImage method is: |
| % |
| % UnregisterORAImage(void) |
| % |
| */ |
| ModuleExport void UnregisterORAImage(void) |
| { |
| (void) UnregisterMagickInfo("ORA"); |
| } |
