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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% JJJ N N X X %
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% J NN N X X %
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% J N N N X %
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% J J N NN X X %
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% JJ N N X X %
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% %
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% %
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% Read/Write Garmin Image Format %
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% %
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% Cristy %
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% July 2012 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickCore/studio.h"
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/cache.h"
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#include "MagickCore/colorspace.h"
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#include "MagickCore/colorspace-private.h"
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#include "MagickCore/draw.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/image.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/list.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/module.h"
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#include "MagickCore/monitor.h"
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#include "MagickCore/monitor-private.h"
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#include "MagickCore/property.h"
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#include "MagickCore/pixel-accessor.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.h"
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typedef struct _JNXInfo
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{
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int
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version,
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serial;
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PointInfo
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northeast,
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southwest;
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int
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levels,
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expire,
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id,
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crc,
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signature;
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unsigned int
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offset;
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int
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order;
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} JNXInfo;
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typedef struct _JNXLevelInfo
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{
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int
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count,
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offset;
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unsigned int
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scale;
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unsigned short
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copyright[MagickPathExtent];
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} JNXLevelInfo;
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e a d J N X I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadJNXImage() reads an image in the Garmin tile storage format and returns
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% it. It allocates the memory necessary for the new Image structure and
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% returns a pointer to the new image.
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%
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% The format of the ReadJNXImage method is:
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%
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% Image *ReadJNXImage(const ImageInfo *image_info,ExceptionInfo *exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *ReadJNXImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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#define JNXMaxLevels 20
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Image
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*image,
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*images;
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JNXInfo
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jnx_info;
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JNXLevelInfo
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jnx_level_info[JNXMaxLevels];
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MagickBooleanType
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status;
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ssize_t
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i;
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/*
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Open image file.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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image=AcquireImage(image_info,exception);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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if (status == MagickFalse)
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{
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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/*
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Read JNX header.
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*/
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(void) memset(&jnx_info,0,sizeof(jnx_info));
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jnx_info.version=ReadBlobLSBSignedLong(image);
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if ((jnx_info.version != 3) && (jnx_info.version != 4))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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jnx_info.serial=ReadBlobLSBSignedLong(image);
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jnx_info.northeast.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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jnx_info.northeast.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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jnx_info.southwest.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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jnx_info.southwest.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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jnx_info.levels=ReadBlobLSBSignedLong(image);
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if (jnx_info.levels > JNXMaxLevels)
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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jnx_info.expire=ReadBlobLSBSignedLong(image);
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jnx_info.id=ReadBlobLSBSignedLong(image);
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jnx_info.crc=ReadBlobLSBSignedLong(image);
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jnx_info.signature=ReadBlobLSBSignedLong(image);
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jnx_info.offset=ReadBlobLSBLong(image);
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if (jnx_info.version > 3)
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jnx_info.order=ReadBlobLSBSignedLong(image);
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else
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if (jnx_info.version == 3)
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jnx_info.order=30;
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if (EOFBlob(image) != MagickFalse)
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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/*
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Read JNX levels.
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*/
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(void) memset(&jnx_level_info,0,sizeof(jnx_level_info));
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for (i=0; i < (ssize_t) jnx_info.levels; i++)
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{
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jnx_level_info[i].count=ReadBlobLSBSignedLong(image);
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if (jnx_level_info[i].count > 50000)
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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jnx_level_info[i].offset=ReadBlobLSBSignedLong(image);
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jnx_level_info[i].scale=ReadBlobLSBLong(image);
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*jnx_level_info[i].copyright='\0';
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if (jnx_info.version > 3)
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{
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ssize_t
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j;
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unsigned short
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c;
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(void) ReadBlobLSBLong(image);
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j=0;
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while ((c=ReadBlobLSBShort(image)) != 0)
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if (j < (MagickPathExtent-1))
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jnx_level_info[i].copyright[j++]=c;
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jnx_level_info[i].copyright[j]='\0';
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}
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if (EOFBlob(image) != MagickFalse)
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ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
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}
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/*
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Read JNX tiles.
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*/
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images=NewImageList();
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for (i=0; i < (ssize_t) jnx_info.levels; i++)
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{
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MagickOffsetType
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offset;
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ssize_t
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j;
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offset=SeekBlob(image,(MagickOffsetType) jnx_level_info[i].offset,SEEK_SET);
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if (offset != (MagickOffsetType) jnx_level_info[i].offset)
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continue;
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for (j=0; j < (ssize_t) jnx_level_info[i].count; j++)
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{
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Image
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*tile_image;
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ImageInfo
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*read_info;
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int
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tile_offset;
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MagickOffsetType
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restore_offset;
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PointInfo
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northeast,
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southwest;
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ssize_t
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count;
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unsigned char
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*blob;
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unsigned int
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tile_length;
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northeast.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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northeast.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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southwest.x=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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southwest.y=180.0*ReadBlobLSBSignedLong(image)/0x7fffffff;
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(void) ReadBlobLSBShort(image); /* width */
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(void) ReadBlobLSBShort(image); /* height */
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if (EOFBlob(image) != MagickFalse)
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{
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images=DestroyImageList(images);
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ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
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}
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tile_length=ReadBlobLSBLong(image);
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tile_offset=ReadBlobLSBSignedLong(image);
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if (tile_offset == -1)
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continue;
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restore_offset=TellBlob(image);
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if (restore_offset < 0)
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continue;
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offset=SeekBlob(image,(MagickOffsetType) tile_offset,SEEK_SET);
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if (offset != (MagickOffsetType) tile_offset)
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continue;
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/*
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Read a tile.
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*/
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if (((MagickSizeType) tile_length) > GetBlobSize(image))
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{
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images=DestroyImageList(images);
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ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
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}
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blob=(unsigned char *) AcquireQuantumMemory((size_t) tile_length+2,
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sizeof(*blob));
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if (blob == (unsigned char *) NULL)
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{
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images=DestroyImageList(images);
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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}
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blob[0]=0xFF;
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blob[1]=0xD8;
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count=ReadBlob(image,tile_length,blob+2);
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if (count != (ssize_t) tile_length)
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{
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images=DestroyImageList(images);
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blob=(unsigned char *) RelinquishMagickMemory(blob);
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ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
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}
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read_info=CloneImageInfo(image_info);
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(void) CopyMagickString(read_info->magick,"JPEG",MagickPathExtent);
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tile_image=BlobToImage(read_info,blob,tile_length+2,exception);
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read_info=DestroyImageInfo(read_info);
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blob=(unsigned char *) RelinquishMagickMemory(blob);
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offset=SeekBlob(image,restore_offset,SEEK_SET);
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if (tile_image == (Image *) NULL)
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continue;
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tile_image->depth=8;
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(void) CopyMagickString(tile_image->magick,image->magick,
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MagickPathExtent);
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(void) FormatImageProperty(tile_image,"jnx:northeast","%.20g,%.20g",
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northeast.x,northeast.y);
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(void) FormatImageProperty(tile_image,"jnx:southwest","%.20g,%.20g",
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southwest.x,southwest.y);
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AppendImageToList(&images,tile_image);
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}
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if (image->progress_monitor != (MagickProgressMonitor) NULL)
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{
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MagickBooleanType
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proceed;
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proceed=SetImageProgress(image,LoadImageTag,(MagickOffsetType) i,
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(MagickSizeType) jnx_info.levels);
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if (proceed == MagickFalse)
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status=MagickFalse;
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}
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}
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(void) CloseBlob(image);
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image=DestroyImage(image);
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return(GetFirstImageInList(images));
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
|
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% %
|
|
|
% %
|
|
|
% R e g i s t e r J N X I m a g e %
|
|
|
% %
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% %
|
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|
% %
|
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
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%
|
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% RegisterJNXImage() adds attributes for the JNX image format to the list
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% of supported formats. The attributes include the image format tag, a
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% method to read and/or write the format, whether the format supports the
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% saving of more than one frame to the same file or blob, whether the format
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% supports native in-memory I/O, and a brief description of the format.
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%
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% The format of the RegisterJNXImage method is:
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%
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% size_t RegisterJNXImage(void)
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%
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*/
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ModuleExport size_t RegisterJNXImage(void)
|
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("JNX","JNX","Garmin tile format");
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entry->decoder=(DecodeImageHandler *) ReadJNXImage;
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entry->flags|=CoderDecoderSeekableStreamFlag;
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
|
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|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r J N X I m a g e %
|
|
|
% %
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|
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% %
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|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% 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");
|
|
|
}
|
