/coders/jnx.c
C | 388 lines | 237 code | 27 blank | 124 comment | 47 complexity | e1648079a6fc11d7108249bd03c0b7c6 MD5 | raw file
- /*
- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
- % %
- % %
- % %
- % 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 1999-2016 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 %
- % %
- % http://www.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 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;
- register 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) ResetMagickMemory(&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;
- /*
- Read JNX levels.
- */
- (void) ResetMagickMemory(&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);
- if (jnx_info.version > 3)
- {
- register 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;
- }
- }
- /*
- Read JNX tiles.
- */
- images=NewImageList();
- for (i=0; i < (ssize_t) jnx_info.levels; i++)
- {
- MagickOffsetType
- offset;
- register 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 */
- 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.
- */
- blob=(unsigned char *) AcquireQuantumMemory((size_t) tile_length+2,
- sizeof(*blob));
- if (blob == (unsigned char *) NULL)
- {
- if (images != (Image *) 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)
- {
- if (images != (Image *) NULL)
- 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;
- (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);
- if (images == (Image *) NULL)
- return((Image *) NULL);
- 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|=CoderSeekableStreamFlag;
- (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");
- }