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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W W BBBB M M PPPP %
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% W W B B MM MM P P %
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% W W W BBBB M M M PPPP %
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% WW WW B B M M P %
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% W W BBBB M M P %
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% %
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% %
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% Read/Write Wireless Bitmap (level 0) Image Format %
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% %
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% Software Design %
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% Cristy %
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% January 2000 %
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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/attribute.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/color-private.h"
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#include "MagickCore/colormap.h"
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#include "MagickCore/colorspace.h"
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#include "MagickCore/colorspace-private.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/monitor.h"
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#include "MagickCore/monitor-private.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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#include "MagickCore/module.h"
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteWBMPImage(const ImageInfo *,Image *,ExceptionInfo *);
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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 W B M P 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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% ReadWBMPImage() reads a WBMP (level 0) image file and returns it. It
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% allocates the memory necessary for the new Image structure and returns a
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% pointer to the new image.
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%
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% ReadWBMPImage was contributed by Milan Votava <votava@mageo.cz>.
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%
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% The format of the ReadWBMPImage method is:
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%
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% Image *ReadWBMPImage(const ImageInfo *image_info,
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% 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 MagickBooleanType WBMPReadInteger(Image *image,size_t *value)
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|
{
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int
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|
|
byte;
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|
*value=0;
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|
do
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|
{
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byte=ReadBlobByte(image);
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if (byte == EOF)
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return(MagickFalse);
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*value<<=7;
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*value|=(unsigned int) (byte & 0x7f);
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|
} while (byte & 0x80);
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|
return(MagickTrue);
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|
}
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|
static Image *ReadWBMPImage(const ImageInfo *image_info,
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|
|
ExceptionInfo *exception)
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|
|
{
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Image
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|
*image;
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int
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byte;
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MagickBooleanType
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|
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status;
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ssize_t
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|
|
x;
|
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Quantum
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|
|
*q;
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ssize_t
|
|
|
y;
|
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|
|
unsigned char
|
|
|
bit;
|
|
|
|
|
|
unsigned short
|
|
|
header;
|
|
|
|
|
|
/*
|
|
|
Open image file.
|
|
|
*/
|
|
|
assert(image_info != (const ImageInfo *) NULL);
|
|
|
assert(image_info->signature == MagickCoreSignature);
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|
|
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);
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|
|
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
image=DestroyImageList(image);
|
|
|
return((Image *) NULL);
|
|
|
}
|
|
|
header=0;
|
|
|
if (ReadBlob(image,2,(unsigned char *) &header) != 2)
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
if (header != 0)
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|
|
ThrowReaderException(CoderError,"OnlyLevelZerofilesSupported");
|
|
|
/*
|
|
|
Initialize image structure.
|
|
|
*/
|
|
|
if (WBMPReadInteger(image,&image->columns) == MagickFalse)
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|
|
ThrowReaderException(CorruptImageError,"CorruptWBMPimage");
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|
|
if (WBMPReadInteger(image,&image->rows) == MagickFalse)
|
|
|
ThrowReaderException(CorruptImageError,"CorruptWBMPimage");
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|
|
if ((image->columns == 0) || (image->rows == 0))
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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|
if (DiscardBlobBytes(image,image->offset) == MagickFalse)
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|
|
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
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|
|
image->filename);
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|
if (image_info->ping != MagickFalse)
|
|
|
{
|
|
|
(void) CloseBlob(image);
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
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|
|
status=SetImageExtent(image,image->columns,image->rows,exception);
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|
|
if (status == MagickFalse)
|
|
|
return(DestroyImageList(image));
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|
|
(void) SetImageBackgroundColor(image,exception);
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|
|
if (AcquireImageColormap(image,2,exception) == MagickFalse)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
/*
|
|
|
Convert bi-level image to pixel packets.
|
|
|
*/
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
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|
|
if (q == (Quantum *) NULL)
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|
|
break;
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|
|
bit=0;
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|
|
byte=0;
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|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
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|
|
if (bit == 0)
|
|
|
{
|
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|
byte=ReadBlobByte(image);
|
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|
if (byte == EOF)
|
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|
ThrowReaderException(CorruptImageError,"CorruptImage");
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|
}
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SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 1 : 0,q);
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bit++;
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|
if (bit == 8)
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|
bit=0;
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|
q+=GetPixelChannels(image);
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|
}
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|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
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|
break;
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|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
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|
|
image->rows);
|
|
|
if (status == MagickFalse)
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|
break;
|
|
|
}
|
|
|
(void) SyncImage(image,exception);
|
|
|
if (EOFBlob(image) != MagickFalse)
|
|
|
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
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|
|
image->filename);
|
|
|
(void) CloseBlob(image);
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
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|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e g i s t e r W B M P I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% RegisterWBMPImage() adds attributes for the WBMP 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 RegisterWBMPImage method is:
|
|
|
%
|
|
|
% size_t RegisterWBMPImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport size_t RegisterWBMPImage(void)
|
|
|
{
|
|
|
MagickInfo
|
|
|
*entry;
|
|
|
|
|
|
entry=AcquireMagickInfo("WBMP","WBMP","Wireless Bitmap (level 0) image");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadWBMPImage;
|
|
|
entry->encoder=(EncodeImageHandler *) WriteWBMPImage;
|
|
|
entry->flags^=CoderAdjoinFlag;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
return(MagickImageCoderSignature);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r W B M P I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% UnregisterWBMPImage() removes format registrations made by the
|
|
|
% WBMP module from the list of supported formats.
|
|
|
%
|
|
|
% The format of the UnregisterWBMPImage method is:
|
|
|
%
|
|
|
% UnregisterWBMPImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport void UnregisterWBMPImage(void)
|
|
|
{
|
|
|
(void) UnregisterMagickInfo("WBMP");
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% W r i t e W B M P I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% WriteWBMPImage() writes an image to a file in the Wireless Bitmap
|
|
|
% (level 0) image format.
|
|
|
%
|
|
|
% WriteWBMPImage was contributed by Milan Votava <votava@mageo.cz>.
|
|
|
%
|
|
|
% The format of the WriteWBMPImage method is:
|
|
|
%
|
|
|
% MagickBooleanType WriteWBMPImage(const ImageInfo *image_info,
|
|
|
% Image *image,ExceptionInfo *exception)
|
|
|
%
|
|
|
% A description of each parameter follows.
|
|
|
%
|
|
|
% o image_info: the image info.
|
|
|
%
|
|
|
% o image: The image.
|
|
|
%
|
|
|
% o exception: return any errors or warnings in this structure.
|
|
|
%
|
|
|
*/
|
|
|
|
|
|
static void WBMPWriteInteger(Image *image,const size_t value)
|
|
|
{
|
|
|
int
|
|
|
bits,
|
|
|
flag,
|
|
|
n;
|
|
|
|
|
|
ssize_t
|
|
|
i;
|
|
|
|
|
|
unsigned char
|
|
|
buffer[5],
|
|
|
octet;
|
|
|
|
|
|
n=1;
|
|
|
bits=28;
|
|
|
flag=MagickFalse;
|
|
|
for (i=4; i >= 0; i--)
|
|
|
{
|
|
|
octet=(unsigned char) ((value >> bits) & 0x7f);
|
|
|
if ((flag == 0) && (octet != 0))
|
|
|
{
|
|
|
flag=MagickTrue;
|
|
|
n=i+1;
|
|
|
}
|
|
|
buffer[4-i]=octet | (i && (flag || octet))*(0x01 << 7);
|
|
|
bits-=7;
|
|
|
}
|
|
|
(void) WriteBlob(image,(size_t) n,buffer+5-n);
|
|
|
}
|
|
|
|
|
|
static MagickBooleanType WriteWBMPImage(const ImageInfo *image_info,
|
|
|
Image *image,ExceptionInfo *exception)
|
|
|
{
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
const Quantum
|
|
|
*p;
|
|
|
|
|
|
ssize_t
|
|
|
x;
|
|
|
|
|
|
ssize_t
|
|
|
y;
|
|
|
|
|
|
unsigned char
|
|
|
bit,
|
|
|
byte;
|
|
|
|
|
|
/*
|
|
|
Open output image file.
|
|
|
*/
|
|
|
assert(image_info != (const ImageInfo *) NULL);
|
|
|
assert(image_info->signature == MagickCoreSignature);
|
|
|
assert(image != (Image *) NULL);
|
|
|
assert(image->signature == MagickCoreSignature);
|
|
|
if (image->debug != MagickFalse)
|
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
|
|
|
assert(exception != (ExceptionInfo *) NULL);
|
|
|
assert(exception->signature == MagickCoreSignature);
|
|
|
status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
|
|
|
if (status == MagickFalse)
|
|
|
return(status);
|
|
|
(void) TransformImageColorspace(image,sRGBColorspace,exception);
|
|
|
/*
|
|
|
Convert image to a bi-level image.
|
|
|
*/
|
|
|
(void) SetImageType(image,BilevelType,exception);
|
|
|
(void) WriteBlobMSBShort(image,0);
|
|
|
WBMPWriteInteger(image,image->columns);
|
|
|
WBMPWriteInteger(image,image->rows);
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
|
|
|
if (p == (const Quantum *) NULL)
|
|
|
break;
|
|
|
bit=0;
|
|
|
byte=0;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
if (GetPixelLuma(image,p) >= (QuantumRange/2.0))
|
|
|
byte|=0x1 << (7-bit);
|
|
|
bit++;
|
|
|
if (bit == 8)
|
|
|
{
|
|
|
(void) WriteBlobByte(image,byte);
|
|
|
bit=0;
|
|
|
byte=0;
|
|
|
}
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (bit != 0)
|
|
|
(void) WriteBlobByte(image,byte);
|
|
|
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
(void) CloseBlob(image);
|
|
|
return(MagickTrue);
|
|
|
}
|
