/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % JJJ N N X X % % J NN N X X % % J N N N X % % J J N NN X X % % JJ N N X X % % % % % % Read/Write Garmin Image Format % % % % Cristy % % July 2012 % % % % % % 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/cache.h" #include "MagickCore/colorspace.h" #include "MagickCore/colorspace-private.h" #include "MagickCore/draw.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/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/property.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/quantum-private.h" #include "MagickCore/static.h" #include "MagickCore/string_.h" typedef struct _JNXInfo { int version, serial; PointInfo northeast, southwest; int levels, expire, id, crc, signature; unsigned int offset; int order; } JNXInfo; typedef struct _JNXLevelInfo { int count, offset; unsigned int scale; unsigned short copyright[MagickPathExtent]; } JNXLevelInfo; /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d J N X I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadJNXImage() reads an image in the Garmin tile storage format 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 ReadJNXImage method is: % % Image *ReadJNXImage(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 *ReadJNXImage(const ImageInfo *image_info,ExceptionInfo *exception) { #define JNXMaxLevels 20 Image *image, *images; JNXInfo jnx_info; JNXLevelInfo jnx_level_info[JNXMaxLevels]; MagickBooleanType status; ssize_t i; /* 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 JNX header. */ (void) memset(&jnx_info,0,sizeof(jnx_info)); jnx_info.version=ReadBlobLSBSignedLong(image); if ((jnx_info.version != 3) && (jnx_info.version != 4)) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); jnx_info.serial=ReadBlobLSBSignedLong(image); jnx_info.northeast.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; jnx_info.northeast.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; jnx_info.southwest.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; jnx_info.southwest.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; jnx_info.levels=ReadBlobLSBSignedLong(image); if (jnx_info.levels > JNXMaxLevels) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); jnx_info.expire=ReadBlobLSBSignedLong(image); jnx_info.id=ReadBlobLSBSignedLong(image); jnx_info.crc=ReadBlobLSBSignedLong(image); jnx_info.signature=ReadBlobLSBSignedLong(image); jnx_info.offset=ReadBlobLSBLong(image); if (jnx_info.version > 3) jnx_info.order=ReadBlobLSBSignedLong(image); else if (jnx_info.version == 3) jnx_info.order=30; if (EOFBlob(image) != MagickFalse) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); /* Read JNX levels. */ (void) memset(&jnx_level_info,0,sizeof(jnx_level_info)); for (i=0; i < (ssize_t) jnx_info.levels; i++) { jnx_level_info[i].count=ReadBlobLSBSignedLong(image); if (jnx_level_info[i].count > 50000) ThrowReaderException(CorruptImageError,"ImproperImageHeader"); jnx_level_info[i].offset=ReadBlobLSBSignedLong(image); jnx_level_info[i].scale=ReadBlobLSBLong(image); *jnx_level_info[i].copyright='\0'; if (jnx_info.version > 3) { ssize_t j; unsigned short c; (void) ReadBlobLSBLong(image); j=0; while ((c=ReadBlobLSBShort(image)) != 0) if (j < (MagickPathExtent-1)) jnx_level_info[i].copyright[j++]=c; jnx_level_info[i].copyright[j]='\0'; } if (EOFBlob(image) != MagickFalse) ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile"); } /* Read JNX tiles. */ images=NewImageList(); for (i=0; i < (ssize_t) jnx_info.levels; i++) { MagickOffsetType offset; ssize_t j; offset=SeekBlob(image,(MagickOffsetType) jnx_level_info[i].offset,SEEK_SET); if (offset != (MagickOffsetType) jnx_level_info[i].offset) continue; for (j=0; j < (ssize_t) jnx_level_info[i].count; j++) { Image *tile_image; ImageInfo *read_info; int tile_offset; MagickOffsetType restore_offset; PointInfo northeast, southwest; ssize_t count; unsigned char *blob; unsigned int tile_length; northeast.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; northeast.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; southwest.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; southwest.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff; (void) ReadBlobLSBShort(image); /* width */ (void) ReadBlobLSBShort(image); /* height */ if (EOFBlob(image) != MagickFalse) { images=DestroyImageList(images); ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile"); } tile_length=ReadBlobLSBLong(image); tile_offset=ReadBlobLSBSignedLong(image); if (tile_offset == -1) continue; restore_offset=TellBlob(image); if (restore_offset < 0) continue; offset=SeekBlob(image,(MagickOffsetType) tile_offset,SEEK_SET); if (offset != (MagickOffsetType) tile_offset) continue; /* Read a tile. */ if (((MagickSizeType) tile_length) > GetBlobSize(image)) { images=DestroyImageList(images); ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile"); } blob=(unsigned char *) AcquireQuantumMemory((size_t) tile_length+2, sizeof(*blob)); if (blob == (unsigned char *) NULL) { images=DestroyImageList(images); ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); } blob[0]=0xFF; blob[1]=0xD8; count=ReadBlob(image,tile_length,blob+2); if (count != (ssize_t) tile_length) { images=DestroyImageList(images); blob=(unsigned char *) RelinquishMagickMemory(blob); ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile"); } read_info=CloneImageInfo(image_info); (void) CopyMagickString(read_info->magick,"JPEG",MagickPathExtent); tile_image=BlobToImage(read_info,blob,tile_length+2,exception); read_info=DestroyImageInfo(read_info); blob=(unsigned char *) RelinquishMagickMemory(blob); offset=SeekBlob(image,restore_offset,SEEK_SET); if (tile_image == (Image *) NULL) continue; tile_image->depth=8; (void) CopyMagickString(tile_image->magick,image->magick, MagickPathExtent); (void) FormatImageProperty(tile_image,"jnx:northeast","%.20g,%.20g", northeast.x,northeast.y); (void) FormatImageProperty(tile_image,"jnx:southwest","%.20g,%.20g", southwest.x,southwest.y); AppendImageToList(&images,tile_image); } if (image->progress_monitor != (MagickProgressMonitor) NULL) { MagickBooleanType proceed; proceed=SetImageProgress(image,LoadImageTag,(MagickOffsetType) i, (MagickSizeType) jnx_info.levels); if (proceed == MagickFalse) status=MagickFalse; } } (void) CloseBlob(image); image=DestroyImage(image); return(GetFirstImageInList(images)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e g i s t e r J N X I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % RegisterJNXImage() adds attributes for the JNX 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 RegisterJNXImage method is: % % size_t RegisterJNXImage(void) % */ ModuleExport size_t RegisterJNXImage(void) { MagickInfo *entry; entry=AcquireMagickInfo("JNX","JNX","Garmin tile format"); entry->decoder=(DecodeImageHandler *) ReadJNXImage; entry->flags|=CoderDecoderSeekableStreamFlag; (void) RegisterMagickInfo(entry); return(MagickImageCoderSignature); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % U n r e g i s t e r J N X I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % UnregisterJNXImage() removes format registrations made by the % JNX module from the list of supported formats. % % The format of the UnregisterJNXImage method is: % % UnregisterJNXImage(void) % */ ModuleExport void UnregisterJNXImage(void) { (void) UnregisterMagickInfo("JNX"); }