| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % OOOOOOO RRRRRR A % |
| % O O R R A A % |
| % O O R R A A % |
| % O O RRRRRR A A % |
| % O O R R AAAAAAA % |
| % O O R R A A % |
| % OOOOOOO R R A A % |
| % % |
| % % |
| % Read OpenRaster (.ora) files % |
| % % |
| % OpenRaster spec: % |
| % https://www.freedesktop.org/wiki/Specifications/OpenRaster/ % |
| % % |
| % Implementer % |
| % Christopher Chianelli % |
| % August 2020 % |
| % % |
| % % |
| % 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/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_LIBZIP_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 (see https://www.freedesktop.org/wiki/Specifications/OpenRaster/Draft/FileLayout/) |
| % it, which is then passed to ReadPNGImage. |
| % |
| % 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) |
| #if defined(MAGICKCORE_LIBZIP_DELEGATE) |
| static Image *ReadORAImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| #define MaxBufferExtent 8192 |
| |
| char |
| image_data_buffer[MaxBufferExtent]; |
| |
| const char |
| *MERGED_IMAGE_PATH = "mergedimage.png"; |
| |
| FILE |
| *file; |
| |
| Image |
| *image_metadata, |
| *out_image; |
| |
| ImageInfo |
| *read_info; |
| |
| int |
| unique_file; |
| |
| zip_t |
| *zip_archive; |
| |
| zip_file_t |
| *merged_image_file; |
| |
| zip_uint64_t |
| read_bytes, |
| offset; |
| |
| int zipError; |
| |
| struct stat stat_info; |
| |
| 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, &zipError); |
| 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); |
| |
| if (unique_file != -1) |
| file=fdopen(unique_file,"wb"); |
| if ((unique_file == -1) || (file == (FILE *) NULL)) |
| { |
| ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile", |
| 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 */ |
| offset = 0; |
| do |
| { |
| read_bytes = zip_fread(merged_image_file, image_data_buffer + offset, MaxBufferExtent - offset); |
| if (read_bytes == -1) { |
| ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile", |
| read_info->filename); |
| fclose(file); |
| RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| image_metadata=DestroyImage(image_metadata); |
| zip_fclose(merged_image_file); |
| zip_discard(zip_archive); |
| zip_fclose(merged_image_file); |
| return((Image *) NULL); |
| } |
| if (read_bytes == 0) { |
| /* Write up to offset of image_data_buffer to temp file */ |
| if (!fwrite(image_data_buffer,offset,1,file)) { |
| ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile", |
| read_info->filename); |
| fclose(file); |
| RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| image_metadata=DestroyImage(image_metadata); |
| zip_fclose(merged_image_file); |
| zip_discard(zip_archive); |
| zip_fclose(merged_image_file); |
| return((Image *) NULL); |
| } |
| } |
| else if (read_bytes == MaxBufferExtent - offset) { |
| /* Write the entirely of image_data_buffer to temp file */ |
| if (!fwrite(image_data_buffer,MaxBufferExtent,1,file)) { |
| ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile", |
| read_info->filename); |
| fclose(file); |
| RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| image_metadata=DestroyImage(image_metadata); |
| zip_fclose(merged_image_file); |
| zip_discard(zip_archive); |
| zip_fclose(merged_image_file); |
| return((Image *) NULL); |
| } |
| offset = 0; |
| } |
| else { |
| offset += read_bytes; |
| } |
| } |
| while (read_bytes > 0); |
| |
| zip_fclose(merged_image_file); |
| zip_discard(zip_archive); |
| fclose(file); |
| |
| /* delegate to ReadImage to read mergedimage.png */ |
| out_image = ReadImage(read_info, exception); |
| RelinquishUniqueFileResource(read_info->filename); |
| read_info=DestroyImageInfo(read_info); |
| |
| /* Update fields of image from fields of png_image */ |
| if (image_metadata != NULL && 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; |
| DestroyImage(image_metadata); |
| } |
| return out_image; |
| } |
| #endif /* #if defined(MAGICKCORE_LIBZIP_DELEGATE) */ |
| #endif /* defined(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_PNG_DELEGATE) |
| #if defined(MAGICKCORE_LIBZIP_DELEGATE) |
| entry->decoder=(DecodeImageHandler *) ReadORAImage; |
| #endif |
| #endif |
| |
| 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"); |
| } |