|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
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|
% %
|
|
|
% %
|
|
|
% DDDD IIIII BBBB %
|
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|
% D D I B B %
|
|
|
% D D I BBBB %
|
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% D D I B B %
|
|
|
% DDDD IIIII BBBB %
|
|
|
% %
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% %
|
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|
% Read/Write Windows DIB Image Format %
|
|
|
% %
|
|
|
% Software Design %
|
|
|
% Cristy %
|
|
|
% July 1992 %
|
|
|
% %
|
|
|
% %
|
|
|
% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
|
|
|
% dedicated to making software imaging solutions freely available. %
|
|
|
% %
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|
|
% 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. %
|
|
|
% %
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|
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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|
|
%
|
|
|
%
|
|
|
*/
|
|
|
|
|
|
/*
|
|
|
Include declarations.
|
|
|
*/
|
|
|
#include "MagickCore/studio.h"
|
|
|
#include "MagickCore/attribute.h"
|
|
|
#include "MagickCore/blob.h"
|
|
|
#include "MagickCore/blob-private.h"
|
|
|
#include "MagickCore/cache.h"
|
|
|
#include "MagickCore/color.h"
|
|
|
#include "MagickCore/color-private.h"
|
|
|
#include "MagickCore/colormap.h"
|
|
|
#include "MagickCore/colormap-private.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/geometry.h"
|
|
|
#include "MagickCore/image.h"
|
|
|
#include "MagickCore/image-private.h"
|
|
|
#include "MagickCore/list.h"
|
|
|
#include "MagickCore/log.h"
|
|
|
#include "MagickCore/magick.h"
|
|
|
#include "MagickCore/memory_.h"
|
|
|
#include "MagickCore/monitor.h"
|
|
|
#include "MagickCore/monitor-private.h"
|
|
|
#include "MagickCore/pixel-accessor.h"
|
|
|
#include "MagickCore/quantum-private.h"
|
|
|
#include "MagickCore/static.h"
|
|
|
#include "MagickCore/string_.h"
|
|
|
#include "MagickCore/module.h"
|
|
|
#include "MagickCore/transform.h"
|
|
|
|
|
|
/*
|
|
|
Typedef declarations.
|
|
|
*/
|
|
|
typedef struct _DIBInfo
|
|
|
{
|
|
|
unsigned int
|
|
|
size;
|
|
|
|
|
|
int
|
|
|
width,
|
|
|
height;
|
|
|
|
|
|
unsigned short
|
|
|
planes,
|
|
|
bits_per_pixel;
|
|
|
|
|
|
unsigned int
|
|
|
compression,
|
|
|
image_size,
|
|
|
x_pixels,
|
|
|
y_pixels,
|
|
|
number_colors,
|
|
|
colors_important;
|
|
|
|
|
|
unsigned short
|
|
|
red_mask,
|
|
|
green_mask,
|
|
|
blue_mask,
|
|
|
alpha_mask;
|
|
|
|
|
|
int
|
|
|
colorspace;
|
|
|
|
|
|
PointInfo
|
|
|
red_primary,
|
|
|
green_primary,
|
|
|
blue_primary,
|
|
|
gamma_scale;
|
|
|
} DIBInfo;
|
|
|
|
|
|
/*
|
|
|
Forward declarations.
|
|
|
*/
|
|
|
static MagickBooleanType
|
|
|
WriteDIBImage(const ImageInfo *,Image *,ExceptionInfo *);
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% D e c o d e I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% DecodeImage unpacks the packed image pixels into runlength-encoded
|
|
|
% pixel packets.
|
|
|
%
|
|
|
% The format of the DecodeImage method is:
|
|
|
%
|
|
|
% MagickBooleanType DecodeImage(Image *image,
|
|
|
% const MagickBooleanType compression,unsigned char *pixels,
|
|
|
% const size_t number_pixels)
|
|
|
%
|
|
|
% A description of each parameter follows:
|
|
|
%
|
|
|
% o image: the address of a structure of type Image.
|
|
|
%
|
|
|
% o compression: A value of 1 means the compressed pixels are runlength
|
|
|
% encoded for a 256-color bitmap. A value of 2 means a 16-color bitmap.
|
|
|
%
|
|
|
% o pixels: The address of a byte (8 bits) array of pixel data created by
|
|
|
% the decoding process.
|
|
|
%
|
|
|
% o number_pixels: the number of pixels.
|
|
|
%
|
|
|
*/
|
|
|
static MagickBooleanType DecodeImage(Image *image,
|
|
|
const MagickBooleanType compression,unsigned char *pixels,
|
|
|
const size_t number_pixels)
|
|
|
{
|
|
|
#if !defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__MINGW32__)
|
|
|
#define BI_RGB 0
|
|
|
#define BI_RLE8 1
|
|
|
#define BI_RLE4 2
|
|
|
#define BI_BITFIELDS 3
|
|
|
#undef BI_JPEG
|
|
|
#define BI_JPEG 4
|
|
|
#undef BI_PNG
|
|
|
#define BI_PNG 5
|
|
|
#endif
|
|
|
|
|
|
int
|
|
|
byte,
|
|
|
count;
|
|
|
|
|
|
ssize_t
|
|
|
y;
|
|
|
|
|
|
ssize_t
|
|
|
i,
|
|
|
x;
|
|
|
|
|
|
unsigned char
|
|
|
*p,
|
|
|
*q;
|
|
|
|
|
|
assert(image != (Image *) NULL);
|
|
|
assert(image->signature == MagickCoreSignature);
|
|
|
if (image->debug != MagickFalse)
|
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
|
|
|
assert(pixels != (unsigned char *) NULL);
|
|
|
(void) memset(pixels,0,number_pixels*sizeof(*pixels));
|
|
|
byte=0;
|
|
|
x=0;
|
|
|
p=pixels;
|
|
|
q=pixels+number_pixels;
|
|
|
for (y=0; y < (ssize_t) image->rows; )
|
|
|
{
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
if ((p < pixels) || (p >= q))
|
|
|
break;
|
|
|
count=ReadBlobByte(image);
|
|
|
if (count == EOF)
|
|
|
break;
|
|
|
if (count > 0)
|
|
|
{
|
|
|
/*
|
|
|
Encoded mode.
|
|
|
*/
|
|
|
count=(int) MagickMin((size_t) count,(size_t) (q-p));
|
|
|
byte=ReadBlobByte(image);
|
|
|
if (byte == EOF)
|
|
|
break;
|
|
|
if (compression == BI_RLE8)
|
|
|
{
|
|
|
for (i=0; i < (ssize_t) count; i++)
|
|
|
*p++=(unsigned char) byte;
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
for (i=0; i < (ssize_t) count; i++)
|
|
|
*p++=(unsigned char)
|
|
|
((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
|
|
|
}
|
|
|
x+=count;
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
/*
|
|
|
Escape mode.
|
|
|
*/
|
|
|
count=ReadBlobByte(image);
|
|
|
if (count == EOF)
|
|
|
break;
|
|
|
if (count == 0x01)
|
|
|
return(MagickTrue);
|
|
|
switch (count)
|
|
|
{
|
|
|
case 0x00:
|
|
|
{
|
|
|
/*
|
|
|
End of line.
|
|
|
*/
|
|
|
x=0;
|
|
|
y++;
|
|
|
p=pixels+y*image->columns;
|
|
|
break;
|
|
|
}
|
|
|
case 0x02:
|
|
|
{
|
|
|
/*
|
|
|
Delta mode.
|
|
|
*/
|
|
|
x+=ReadBlobByte(image);
|
|
|
y+=ReadBlobByte(image);
|
|
|
p=pixels+y*image->columns+x;
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
{
|
|
|
/*
|
|
|
Absolute mode.
|
|
|
*/
|
|
|
count=(int) MagickMin((size_t) count,(size_t) (q-p));
|
|
|
if (compression == BI_RLE8)
|
|
|
for (i=0; i < (ssize_t) count; i++)
|
|
|
{
|
|
|
byte=ReadBlobByte(image);
|
|
|
if (byte == EOF)
|
|
|
break;
|
|
|
*p++=(unsigned char) byte;
|
|
|
}
|
|
|
else
|
|
|
for (i=0; i < (ssize_t) count; i++)
|
|
|
{
|
|
|
if ((i & 0x01) == 0)
|
|
|
{
|
|
|
byte=ReadBlobByte(image);
|
|
|
if (byte == EOF)
|
|
|
break;
|
|
|
}
|
|
|
*p++=(unsigned char)
|
|
|
((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
|
|
|
}
|
|
|
x+=count;
|
|
|
/*
|
|
|
Read pad byte.
|
|
|
*/
|
|
|
if (compression == BI_RLE8)
|
|
|
{
|
|
|
if ((count & 0x01) != 0)
|
|
|
if (ReadBlobByte(image) == EOF)
|
|
|
break;
|
|
|
}
|
|
|
else
|
|
|
if (((count & 0x03) == 1) || ((count & 0x03) == 2))
|
|
|
if (ReadBlobByte(image) == EOF)
|
|
|
break;
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
(void) ReadBlobByte(image); /* end of line */
|
|
|
(void) ReadBlobByte(image);
|
|
|
return(y < (ssize_t) image->rows ? MagickFalse : MagickTrue);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% E n c o d e I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% EncodeImage compresses pixels using a runlength encoded format.
|
|
|
%
|
|
|
% The format of the EncodeImage method is:
|
|
|
%
|
|
|
% static MagickBooleanType EncodeImage(Image *image,
|
|
|
% const size_t bytes_per_line,const unsigned char *pixels,
|
|
|
% unsigned char *compressed_pixels)
|
|
|
%
|
|
|
% A description of each parameter follows:
|
|
|
%
|
|
|
% o image: The image.
|
|
|
%
|
|
|
% o bytes_per_line: the number of bytes in a scanline of compressed pixels
|
|
|
%
|
|
|
% o pixels: The address of a byte (8 bits) array of pixel data created by
|
|
|
% the compression process.
|
|
|
%
|
|
|
% o compressed_pixels: The address of a byte (8 bits) array of compressed
|
|
|
% pixel data.
|
|
|
%
|
|
|
*/
|
|
|
static size_t EncodeImage(Image *image,const size_t bytes_per_line,
|
|
|
const unsigned char *pixels,unsigned char *compressed_pixels)
|
|
|
{
|
|
|
ssize_t
|
|
|
y;
|
|
|
|
|
|
const unsigned char
|
|
|
*p;
|
|
|
|
|
|
ssize_t
|
|
|
i,
|
|
|
x;
|
|
|
|
|
|
unsigned char
|
|
|
*q;
|
|
|
|
|
|
/*
|
|
|
Runlength encode pixels.
|
|
|
*/
|
|
|
assert(image != (Image *) NULL);
|
|
|
assert(image->signature == MagickCoreSignature);
|
|
|
if (image->debug != MagickFalse)
|
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
|
|
|
assert(pixels != (const unsigned char *) NULL);
|
|
|
assert(compressed_pixels != (unsigned char *) NULL);
|
|
|
p=pixels;
|
|
|
q=compressed_pixels;
|
|
|
i=0;
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
for (x=0; x < (ssize_t) bytes_per_line; x+=i)
|
|
|
{
|
|
|
/*
|
|
|
Determine runlength.
|
|
|
*/
|
|
|
for (i=1; ((x+i) < (ssize_t) bytes_per_line); i++)
|
|
|
if ((*(p+i) != *p) || (i == 255))
|
|
|
break;
|
|
|
*q++=(unsigned char) i;
|
|
|
*q++=(*p);
|
|
|
p+=i;
|
|
|
}
|
|
|
/*
|
|
|
End of line.
|
|
|
*/
|
|
|
*q++=0x00;
|
|
|
*q++=0x00;
|
|
|
if (SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows) == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
/*
|
|
|
End of bitmap.
|
|
|
*/
|
|
|
*q++=0;
|
|
|
*q++=0x01;
|
|
|
return((size_t) (q-compressed_pixels));
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% I s D I B %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% IsDIB() returns MagickTrue if the image format type, identified by the
|
|
|
% magick string, is DIB.
|
|
|
%
|
|
|
% The format of the IsDIB method is:
|
|
|
%
|
|
|
% MagickBooleanType IsDIB(const unsigned char *magick,const size_t length)
|
|
|
%
|
|
|
% A description of each parameter follows:
|
|
|
%
|
|
|
% o magick: compare image format pattern against these bytes.
|
|
|
%
|
|
|
% o length: Specifies the length of the magick string.
|
|
|
%
|
|
|
*/
|
|
|
static MagickBooleanType IsDIB(const unsigned char *magick,const size_t length)
|
|
|
{
|
|
|
if (length < 2)
|
|
|
return(MagickFalse);
|
|
|
if (memcmp(magick,"\050\000",2) == 0)
|
|
|
return(MagickTrue);
|
|
|
return(MagickFalse);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e a d D I B I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% ReadDIBImage() reads a Microsoft Windows bitmap image file 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 ReadDIBImage method is:
|
|
|
%
|
|
|
% image=ReadDIBImage(image_info)
|
|
|
%
|
|
|
% A description of each parameter follows:
|
|
|
%
|
|
|
% o image_info: the image info.
|
|
|
%
|
|
|
% o exception: return any errors or warnings in this structure.
|
|
|
%
|
|
|
*/
|
|
|
static Image *ReadDIBImage(const ImageInfo *image_info,ExceptionInfo *exception)
|
|
|
{
|
|
|
DIBInfo
|
|
|
dib_info;
|
|
|
|
|
|
Image
|
|
|
*image;
|
|
|
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
MemoryInfo
|
|
|
*pixel_info;
|
|
|
|
|
|
Quantum
|
|
|
index;
|
|
|
|
|
|
ssize_t
|
|
|
x;
|
|
|
|
|
|
Quantum
|
|
|
*q;
|
|
|
|
|
|
ssize_t
|
|
|
i;
|
|
|
|
|
|
unsigned char
|
|
|
*p;
|
|
|
|
|
|
size_t
|
|
|
bytes_per_line,
|
|
|
length;
|
|
|
|
|
|
ssize_t
|
|
|
bit,
|
|
|
count,
|
|
|
y;
|
|
|
|
|
|
|
|
|
unsigned char
|
|
|
*pixels;
|
|
|
|
|
|
/*
|
|
|
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);
|
|
|
}
|
|
|
/*
|
|
|
Determine if this a DIB file.
|
|
|
*/
|
|
|
(void) memset(&dib_info,0,sizeof(dib_info));
|
|
|
dib_info.size=ReadBlobLSBLong(image);
|
|
|
if (dib_info.size != 40)
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
/*
|
|
|
Microsoft Windows 3.X DIB image file.
|
|
|
*/
|
|
|
dib_info.width=ReadBlobLSBSignedLong(image);
|
|
|
dib_info.height=ReadBlobLSBSignedLong(image);
|
|
|
dib_info.planes=ReadBlobLSBShort(image);
|
|
|
dib_info.bits_per_pixel=ReadBlobLSBShort(image);
|
|
|
if (dib_info.bits_per_pixel > 32)
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
dib_info.compression=ReadBlobLSBLong(image);
|
|
|
dib_info.image_size=ReadBlobLSBLong(image);
|
|
|
dib_info.x_pixels=ReadBlobLSBLong(image);
|
|
|
dib_info.y_pixels=ReadBlobLSBLong(image);
|
|
|
dib_info.number_colors=ReadBlobLSBLong(image);
|
|
|
dib_info.colors_important=ReadBlobLSBLong(image);
|
|
|
if ((dib_info.bits_per_pixel != 1) && (dib_info.bits_per_pixel != 4) &&
|
|
|
(dib_info.bits_per_pixel != 8) && (dib_info.bits_per_pixel != 16) &&
|
|
|
(dib_info.bits_per_pixel != 24) && (dib_info.bits_per_pixel != 32))
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
if ((dib_info.compression == BI_BITFIELDS) &&
|
|
|
((dib_info.bits_per_pixel == 16) || (dib_info.bits_per_pixel == 32)))
|
|
|
{
|
|
|
dib_info.red_mask=(unsigned short) ReadBlobLSBLong(image);
|
|
|
dib_info.green_mask=(unsigned short) ReadBlobLSBLong(image);
|
|
|
dib_info.blue_mask=(unsigned short) ReadBlobLSBLong(image);
|
|
|
}
|
|
|
if (EOFBlob(image) != MagickFalse)
|
|
|
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
|
|
|
if (dib_info.width <= 0)
|
|
|
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
|
|
|
if (dib_info.height == 0)
|
|
|
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
|
|
|
if (dib_info.planes != 1)
|
|
|
ThrowReaderException(CorruptImageError,"StaticPlanesValueNotEqualToOne");
|
|
|
if ((dib_info.bits_per_pixel != 1) && (dib_info.bits_per_pixel != 4) &&
|
|
|
(dib_info.bits_per_pixel != 8) && (dib_info.bits_per_pixel != 16) &&
|
|
|
(dib_info.bits_per_pixel != 24) && (dib_info.bits_per_pixel != 32))
|
|
|
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
|
|
if ((dib_info.bits_per_pixel < 16) &&
|
|
|
(dib_info.number_colors > (unsigned int) (1UL << dib_info.bits_per_pixel)))
|
|
|
ThrowReaderException(CorruptImageError,"UnrecognizedNumberOfColors");
|
|
|
if ((dib_info.compression == 1) && (dib_info.bits_per_pixel != 8))
|
|
|
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
|
|
if ((dib_info.compression == 2) && (dib_info.bits_per_pixel != 4))
|
|
|
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
|
|
if ((dib_info.compression == 3) && (dib_info.bits_per_pixel < 16))
|
|
|
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
|
|
switch (dib_info.compression)
|
|
|
{
|
|
|
case BI_RGB:
|
|
|
case BI_RLE8:
|
|
|
case BI_RLE4:
|
|
|
case BI_BITFIELDS:
|
|
|
break;
|
|
|
case BI_JPEG:
|
|
|
ThrowReaderException(CoderError,"JPEGCompressNotSupported");
|
|
|
case BI_PNG:
|
|
|
ThrowReaderException(CoderError,"PNGCompressNotSupported");
|
|
|
default:
|
|
|
ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
|
|
|
}
|
|
|
image->columns=(size_t) MagickAbsoluteValue((ssize_t) dib_info.width);
|
|
|
image->rows=(size_t) MagickAbsoluteValue((ssize_t) dib_info.height);
|
|
|
image->depth=8;
|
|
|
image->alpha_trait=dib_info.bits_per_pixel == 32 ? BlendPixelTrait :
|
|
|
UndefinedPixelTrait;
|
|
|
if ((dib_info.number_colors > 256) || (dib_info.colors_important > 256))
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
if ((dib_info.number_colors != 0) && (dib_info.bits_per_pixel > 8))
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
if ((dib_info.image_size != 0U) && (dib_info.image_size > GetBlobSize(image)))
|
|
|
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
|
|
|
if ((dib_info.number_colors != 0) || (dib_info.bits_per_pixel < 8))
|
|
|
{
|
|
|
size_t
|
|
|
one;
|
|
|
|
|
|
image->storage_class=PseudoClass;
|
|
|
image->colors=dib_info.number_colors;
|
|
|
one=1;
|
|
|
if (image->colors == 0)
|
|
|
image->colors=one << dib_info.bits_per_pixel;
|
|
|
}
|
|
|
if (image_info->size)
|
|
|
{
|
|
|
RectangleInfo
|
|
|
geometry;
|
|
|
|
|
|
MagickStatusType
|
|
|
flags;
|
|
|
|
|
|
flags=ParseAbsoluteGeometry(image_info->size,&geometry);
|
|
|
if (flags & WidthValue)
|
|
|
if ((geometry.width != 0) && (geometry.width < image->columns))
|
|
|
image->columns=geometry.width;
|
|
|
if (flags & HeightValue)
|
|
|
if ((geometry.height != 0) && (geometry.height < image->rows))
|
|
|
image->rows=geometry.height;
|
|
|
}
|
|
|
status=SetImageExtent(image,image->columns,image->rows,exception);
|
|
|
if (status == MagickFalse)
|
|
|
return(DestroyImageList(image));
|
|
|
if (image->storage_class == PseudoClass)
|
|
|
{
|
|
|
size_t
|
|
|
packet_size;
|
|
|
|
|
|
unsigned char
|
|
|
*dib_colormap;
|
|
|
|
|
|
/*
|
|
|
Read DIB raster colormap.
|
|
|
*/
|
|
|
if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
length=(size_t) image->colors;
|
|
|
dib_colormap=(unsigned char *) AcquireQuantumMemory(length,
|
|
|
4*sizeof(*dib_colormap));
|
|
|
if (dib_colormap == (unsigned char *) NULL)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
packet_size=4;
|
|
|
count=ReadBlob(image,packet_size*image->colors,dib_colormap);
|
|
|
if (count != (ssize_t) (packet_size*image->colors))
|
|
|
{
|
|
|
dib_colormap=(unsigned char *) RelinquishMagickMemory(dib_colormap);
|
|
|
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
|
|
|
}
|
|
|
p=dib_colormap;
|
|
|
for (i=0; i < (ssize_t) image->colors; i++)
|
|
|
{
|
|
|
image->colormap[i].blue=(MagickRealType) ScaleCharToQuantum(*p++);
|
|
|
image->colormap[i].green=(MagickRealType) ScaleCharToQuantum(*p++);
|
|
|
image->colormap[i].red=(MagickRealType) ScaleCharToQuantum(*p++);
|
|
|
if (packet_size == 4)
|
|
|
p++;
|
|
|
}
|
|
|
dib_colormap=(unsigned char *) RelinquishMagickMemory(dib_colormap);
|
|
|
}
|
|
|
/*
|
|
|
Read image data.
|
|
|
*/
|
|
|
if (dib_info.compression == BI_RLE4)
|
|
|
dib_info.bits_per_pixel<<=1;
|
|
|
bytes_per_line=4*((image->columns*dib_info.bits_per_pixel+31)/32);
|
|
|
length=bytes_per_line*image->rows;
|
|
|
if ((MagickSizeType) length > (256*GetBlobSize(image)))
|
|
|
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
|
|
|
pixel_info=AcquireVirtualMemory(image->rows,MagickMax(bytes_per_line,
|
|
|
image->columns+256UL)*sizeof(*pixels));
|
|
|
if (pixel_info == (MemoryInfo *) NULL)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
|
|
|
if ((dib_info.compression == BI_RGB) ||
|
|
|
(dib_info.compression == BI_BITFIELDS))
|
|
|
{
|
|
|
count=ReadBlob(image,length,pixels);
|
|
|
if (count != (ssize_t) (length))
|
|
|
{
|
|
|
pixel_info=RelinquishVirtualMemory(pixel_info);
|
|
|
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
|
|
|
}
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
/*
|
|
|
Convert run-length encoded raster pixels.
|
|
|
*/
|
|
|
status=DecodeImage(image,dib_info.compression ? MagickTrue : MagickFalse,
|
|
|
pixels,image->columns*image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
pixel_info=RelinquishVirtualMemory(pixel_info);
|
|
|
ThrowReaderException(CorruptImageError,
|
|
|
"UnableToRunlengthDecodeImage");
|
|
|
}
|
|
|
}
|
|
|
/*
|
|
|
Initialize image structure.
|
|
|
*/
|
|
|
image->units=PixelsPerCentimeterResolution;
|
|
|
image->resolution.x=(double) dib_info.x_pixels/100.0;
|
|
|
image->resolution.y=(double) dib_info.y_pixels/100.0;
|
|
|
/*
|
|
|
Convert DIB raster image to pixel packets.
|
|
|
*/
|
|
|
switch (dib_info.bits_per_pixel)
|
|
|
{
|
|
|
case 1:
|
|
|
{
|
|
|
/*
|
|
|
Convert bitmap scanline.
|
|
|
*/
|
|
|
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
|
|
{
|
|
|
p=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
for (x=0; x < ((ssize_t) image->columns-7); x+=8)
|
|
|
{
|
|
|
for (bit=0; bit < 8; bit++)
|
|
|
{
|
|
|
index=(Quantum) ((*p) & (0x80 >> bit) ? 0x01 : 0x00);
|
|
|
SetPixelIndex(image,index,q);
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
p++;
|
|
|
}
|
|
|
if ((image->columns % 8) != 0)
|
|
|
{
|
|
|
for (bit=0; bit < (ssize_t) (image->columns % 8); bit++)
|
|
|
{
|
|
|
index=(Quantum) ((*p) & (0x80 >> bit) ? 0x01 : 0x00);
|
|
|
SetPixelIndex(image,index,q);
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
p++;
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
if (image->previous == (Image *) NULL)
|
|
|
{
|
|
|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
|
|
image->rows-y-1,image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
(void) SyncImage(image,exception);
|
|
|
break;
|
|
|
}
|
|
|
case 4:
|
|
|
{
|
|
|
/*
|
|
|
Convert PseudoColor scanline.
|
|
|
*/
|
|
|
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
|
|
{
|
|
|
p=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
for (x=0; x < ((ssize_t) image->columns-1); x+=2)
|
|
|
{
|
|
|
index=(Quantum) ConstrainColormapIndex(image,(ssize_t) (*p >> 4) &
|
|
|
0xf,exception);
|
|
|
SetPixelIndex(image,index,q);
|
|
|
q+=GetPixelChannels(image);
|
|
|
index=(Quantum) ConstrainColormapIndex(image,(ssize_t) *p & 0xf,
|
|
|
exception);
|
|
|
SetPixelIndex(image,index,q);
|
|
|
p++;
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
if ((image->columns % 2) != 0)
|
|
|
{
|
|
|
index=(Quantum) ConstrainColormapIndex(image,(ssize_t) (*p >> 4) &
|
|
|
0xf,exception);
|
|
|
SetPixelIndex(image,index,q);
|
|
|
q+=GetPixelChannels(image);
|
|
|
p++;
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
if (image->previous == (Image *) NULL)
|
|
|
{
|
|
|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
|
|
image->rows-y-1,image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
(void) SyncImage(image,exception);
|
|
|
break;
|
|
|
}
|
|
|
case 8:
|
|
|
{
|
|
|
/*
|
|
|
Convert PseudoColor scanline.
|
|
|
*/
|
|
|
if ((dib_info.compression == BI_RLE8) ||
|
|
|
(dib_info.compression == BI_RLE4))
|
|
|
bytes_per_line=image->columns;
|
|
|
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
|
|
{
|
|
|
p=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
index=(Quantum) ConstrainColormapIndex(image,(ssize_t) *p,exception);
|
|
|
SetPixelIndex(image,index,q);
|
|
|
p++;
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
if (image->previous == (Image *) NULL)
|
|
|
{
|
|
|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
|
|
image->rows-y-1,image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
(void) SyncImage(image,exception);
|
|
|
break;
|
|
|
}
|
|
|
case 16:
|
|
|
{
|
|
|
unsigned short
|
|
|
word;
|
|
|
|
|
|
/*
|
|
|
Convert PseudoColor scanline.
|
|
|
*/
|
|
|
image->storage_class=DirectClass;
|
|
|
if (dib_info.compression == BI_RLE8)
|
|
|
bytes_per_line=2*image->columns;
|
|
|
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
|
|
{
|
|
|
p=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
word=(*p++);
|
|
|
word|=(*p++ << 8);
|
|
|
if (dib_info.red_mask == 0)
|
|
|
{
|
|
|
SetPixelRed(image,ScaleCharToQuantum(ScaleColor5to8(
|
|
|
(unsigned char) ((word >> 10) & 0x1f))),q);
|
|
|
SetPixelGreen(image,ScaleCharToQuantum(ScaleColor5to8(
|
|
|
(unsigned char) ((word >> 5) & 0x1f))),q);
|
|
|
SetPixelBlue(image,ScaleCharToQuantum(ScaleColor5to8(
|
|
|
(unsigned char) (word & 0x1f))),q);
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
SetPixelRed(image,ScaleCharToQuantum(ScaleColor5to8(
|
|
|
(unsigned char) ((word >> 11) & 0x1f))),q);
|
|
|
SetPixelGreen(image,ScaleCharToQuantum(ScaleColor6to8(
|
|
|
(unsigned char) ((word >> 5) & 0x3f))),q);
|
|
|
SetPixelBlue(image,ScaleCharToQuantum(ScaleColor5to8(
|
|
|
(unsigned char) (word & 0x1f))),q);
|
|
|
}
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
if (image->previous == (Image *) NULL)
|
|
|
{
|
|
|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
|
|
image->rows-y-1,image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
case 24:
|
|
|
case 32:
|
|
|
{
|
|
|
/*
|
|
|
Convert DirectColor scanline.
|
|
|
*/
|
|
|
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
|
|
{
|
|
|
p=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
|
|
|
SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
|
|
|
SetPixelRed(image,ScaleCharToQuantum(*p++),q);
|
|
|
if (image->alpha_trait != UndefinedPixelTrait)
|
|
|
SetPixelAlpha(image,ScaleCharToQuantum(*p++),q);
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
if (image->previous == (Image *) NULL)
|
|
|
{
|
|
|
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
|
|
image->rows-y-1,image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
pixel_info=RelinquishVirtualMemory(pixel_info);
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
|
|
}
|
|
|
pixel_info=RelinquishVirtualMemory(pixel_info);
|
|
|
if (strcmp(image_info->magick,"ICODIB") == 0)
|
|
|
{
|
|
|
int
|
|
|
c;
|
|
|
|
|
|
/*
|
|
|
Handle ICO mask.
|
|
|
*/
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
for (x=0; x < ((ssize_t) image->columns-7); x+=8)
|
|
|
{
|
|
|
c=ReadBlobByte(image);
|
|
|
for (bit=0; bit < 8; bit++)
|
|
|
{
|
|
|
if (c & (0x80 >> bit))
|
|
|
image->alpha_trait=BlendPixelTrait;
|
|
|
SetPixelAlpha(image,c & (0x80 >> bit) ? TransparentAlpha :
|
|
|
OpaqueAlpha,q+x*GetPixelChannels(image)+bit);
|
|
|
}
|
|
|
}
|
|
|
if ((image->columns % 8) != 0)
|
|
|
{
|
|
|
c=ReadBlobByte(image);
|
|
|
for (bit=0; bit < (ssize_t) (image->columns % 8); bit++)
|
|
|
{
|
|
|
if (c & (0x80 >> bit))
|
|
|
image->alpha_trait=BlendPixelTrait;
|
|
|
SetPixelAlpha(image,c & (0x80 >> bit) ? TransparentAlpha :
|
|
|
OpaqueAlpha,q+x*GetPixelChannels(image)+bit);
|
|
|
}
|
|
|
}
|
|
|
if (image->columns % 32)
|
|
|
for (x=0; x < (ssize_t) ((32-(image->columns % 32))/8); x++)
|
|
|
c=ReadBlobByte(image);
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
if (EOFBlob(image) != MagickFalse)
|
|
|
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
|
|
|
image->filename);
|
|
|
if (dib_info.height < 0)
|
|
|
{
|
|
|
Image
|
|
|
*flipped_image;
|
|
|
|
|
|
/*
|
|
|
Correct image orientation.
|
|
|
*/
|
|
|
flipped_image=FlipImage(image,exception);
|
|
|
if (flipped_image != (Image *) NULL)
|
|
|
{
|
|
|
DuplicateBlob(flipped_image,image);
|
|
|
image=DestroyImage(image);
|
|
|
image=flipped_image;
|
|
|
}
|
|
|
}
|
|
|
(void) CloseBlob(image);
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e g i s t e r D I B I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% RegisterDIBImage() adds attributes for the DIB 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 RegisterDIBImage method is:
|
|
|
%
|
|
|
% size_t RegisterDIBImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport size_t RegisterDIBImage(void)
|
|
|
{
|
|
|
MagickInfo
|
|
|
*entry;
|
|
|
|
|
|
entry=AcquireMagickInfo("DIB","DIB",
|
|
|
"Microsoft Windows 3.X Packed Device-Independent Bitmap");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadDIBImage;
|
|
|
entry->encoder=(EncodeImageHandler *) WriteDIBImage;
|
|
|
entry->magick=(IsImageFormatHandler *) IsDIB;
|
|
|
entry->flags^=CoderAdjoinFlag;
|
|
|
entry->flags|=CoderStealthFlag;
|
|
|
entry->flags|=CoderDecoderSeekableStreamFlag;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
entry=AcquireMagickInfo("DIB","ICODIB",
|
|
|
"Microsoft Windows 3.X Packed Device-Independent Bitmap");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadDIBImage;
|
|
|
entry->magick=(IsImageFormatHandler *) IsDIB;
|
|
|
entry->flags^=CoderAdjoinFlag;
|
|
|
entry->flags|=CoderStealthFlag;
|
|
|
entry->flags|=CoderDecoderSeekableStreamFlag;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
return(MagickImageCoderSignature);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r D I B I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% UnregisterDIBImage() removes format registrations made by the
|
|
|
% DIB module from the list of supported formats.
|
|
|
%
|
|
|
% The format of the UnregisterDIBImage method is:
|
|
|
%
|
|
|
% UnregisterDIBImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport void UnregisterDIBImage(void)
|
|
|
{
|
|
|
(void) UnregisterMagickInfo("ICODIB");
|
|
|
(void) UnregisterMagickInfo("DIB");
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% W r i t e D I B I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% WriteDIBImage() writes an image in Microsoft Windows bitmap encoded
|
|
|
% image format.
|
|
|
%
|
|
|
% The format of the WriteDIBImage method is:
|
|
|
%
|
|
|
% MagickBooleanType WriteDIBImage(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 MagickBooleanType WriteDIBImage(const ImageInfo *image_info,Image *image,
|
|
|
ExceptionInfo *exception)
|
|
|
{
|
|
|
DIBInfo
|
|
|
dib_info;
|
|
|
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
const Quantum
|
|
|
*p;
|
|
|
|
|
|
ssize_t
|
|
|
i,
|
|
|
x;
|
|
|
|
|
|
unsigned char
|
|
|
*q;
|
|
|
|
|
|
size_t
|
|
|
bytes_per_line;
|
|
|
|
|
|
ssize_t
|
|
|
y;
|
|
|
|
|
|
unsigned char
|
|
|
*dib_data,
|
|
|
*pixels;
|
|
|
|
|
|
/*
|
|
|
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);
|
|
|
if (((image->columns << 3) != (size_t) ((int) (image->columns << 3))) ||
|
|
|
((image->rows << 3) != (size_t) ((int) (image->rows << 3))))
|
|
|
ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
|
|
|
/*
|
|
|
Initialize DIB raster file header.
|
|
|
*/
|
|
|
(void) TransformImageColorspace(image,sRGBColorspace,exception);
|
|
|
if (image->storage_class == DirectClass)
|
|
|
{
|
|
|
/*
|
|
|
Full color DIB raster.
|
|
|
*/
|
|
|
dib_info.number_colors=0;
|
|
|
dib_info.bits_per_pixel=(unsigned short) (image->alpha_trait ? 32 : 24);
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
/*
|
|
|
Colormapped DIB raster.
|
|
|
*/
|
|
|
dib_info.bits_per_pixel=8;
|
|
|
if (image_info->depth > 8)
|
|
|
dib_info.bits_per_pixel=16;
|
|
|
if (SetImageMonochrome(image,exception) != MagickFalse)
|
|
|
dib_info.bits_per_pixel=1;
|
|
|
dib_info.number_colors=(unsigned int) (dib_info.bits_per_pixel == 16 ? 0 :
|
|
|
(1UL << dib_info.bits_per_pixel));
|
|
|
}
|
|
|
bytes_per_line=4*((image->columns*dib_info.bits_per_pixel+31)/32);
|
|
|
dib_info.size=40;
|
|
|
dib_info.width=(int) image->columns;
|
|
|
dib_info.height=(int) image->rows;
|
|
|
dib_info.planes=1;
|
|
|
dib_info.compression=(unsigned int) (dib_info.bits_per_pixel == 16 ?
|
|
|
BI_BITFIELDS : BI_RGB);
|
|
|
dib_info.image_size=(unsigned int) (bytes_per_line*image->rows);
|
|
|
dib_info.x_pixels=75*39;
|
|
|
dib_info.y_pixels=75*39;
|
|
|
switch (image->units)
|
|
|
{
|
|
|
case UndefinedResolution:
|
|
|
case PixelsPerInchResolution:
|
|
|
{
|
|
|
dib_info.x_pixels=(unsigned int) (100.0*image->resolution.x/2.54);
|
|
|
dib_info.y_pixels=(unsigned int) (100.0*image->resolution.y/2.54);
|
|
|
break;
|
|
|
}
|
|
|
case PixelsPerCentimeterResolution:
|
|
|
{
|
|
|
dib_info.x_pixels=(unsigned int) (100.0*image->resolution.x);
|
|
|
dib_info.y_pixels=(unsigned int) (100.0*image->resolution.y);
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
dib_info.colors_important=dib_info.number_colors;
|
|
|
/*
|
|
|
Convert MIFF to DIB raster pixels.
|
|
|
*/
|
|
|
pixels=(unsigned char *) AcquireQuantumMemory(image->rows,MagickMax(
|
|
|
bytes_per_line,image->columns+256UL)*sizeof(*pixels));
|
|
|
if (pixels == (unsigned char *) NULL)
|
|
|
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
(void) memset(pixels,0,dib_info.image_size);
|
|
|
switch (dib_info.bits_per_pixel)
|
|
|
{
|
|
|
case 1:
|
|
|
{
|
|
|
unsigned char
|
|
|
bit,
|
|
|
byte;
|
|
|
|
|
|
/*
|
|
|
Convert PseudoClass image to a DIB monochrome image.
|
|
|
*/
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
|
|
|
if (p == (const Quantum *) NULL)
|
|
|
break;
|
|
|
q=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
bit=0;
|
|
|
byte=0;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
byte<<=1;
|
|
|
byte|=GetPixelIndex(image,p) != 0 ? 0x01 : 0x00;
|
|
|
bit++;
|
|
|
if (bit == 8)
|
|
|
{
|
|
|
*q++=byte;
|
|
|
bit=0;
|
|
|
byte=0;
|
|
|
}
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (bit != 0)
|
|
|
{
|
|
|
*q++=(unsigned char) (byte << (8-bit));
|
|
|
x++;
|
|
|
}
|
|
|
for (x=(ssize_t) (image->columns+7)/8; x < (ssize_t) bytes_per_line; x++)
|
|
|
*q++=0x00;
|
|
|
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
case 8:
|
|
|
{
|
|
|
/*
|
|
|
Convert PseudoClass packet to DIB pixel.
|
|
|
*/
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
|
|
|
if (p == (const Quantum *) NULL)
|
|
|
break;
|
|
|
q=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
*q++=(unsigned char) ((ssize_t) GetPixelIndex(image,p));
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
for ( ; x < (ssize_t) bytes_per_line; x++)
|
|
|
*q++=0x00;
|
|
|
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
case 16:
|
|
|
{
|
|
|
unsigned short
|
|
|
word;
|
|
|
/*
|
|
|
Convert PseudoClass packet to DIB pixel.
|
|
|
*/
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
|
|
|
if (p == (const Quantum *) NULL)
|
|
|
break;
|
|
|
q=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
word=(unsigned short) ((ScaleColor8to5((unsigned char)
|
|
|
ScaleQuantumToChar(GetPixelRed(image,p))) << 11) | (ScaleColor8to6(
|
|
|
(unsigned char) ScaleQuantumToChar(GetPixelGreen(image,p))) << 5) |
|
|
|
(ScaleColor8to5((unsigned char) ScaleQuantumToChar((unsigned char)
|
|
|
GetPixelBlue(image,p)) << 0)));
|
|
|
*q++=(unsigned char)(word & 0xff);
|
|
|
*q++=(unsigned char)(word >> 8);
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
for (x=(ssize_t) (2*image->columns); x < (ssize_t) bytes_per_line; x++)
|
|
|
*q++=0x00;
|
|
|
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
case 24:
|
|
|
case 32:
|
|
|
{
|
|
|
/*
|
|
|
Convert DirectClass packet to DIB RGB pixel.
|
|
|
*/
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
|
|
|
if (p == (const Quantum *) NULL)
|
|
|
break;
|
|
|
q=pixels+(image->rows-y-1)*bytes_per_line;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
*q++=ScaleQuantumToChar(GetPixelBlue(image,p));
|
|
|
*q++=ScaleQuantumToChar(GetPixelGreen(image,p));
|
|
|
*q++=ScaleQuantumToChar(GetPixelRed(image,p));
|
|
|
if (image->alpha_trait != UndefinedPixelTrait)
|
|
|
*q++=ScaleQuantumToChar(GetPixelAlpha(image,p));
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (dib_info.bits_per_pixel == 24)
|
|
|
for (x=(ssize_t) (3*image->columns); x < (ssize_t) bytes_per_line; x++)
|
|
|
*q++=0x00;
|
|
|
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
|
|
image->rows);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
if (dib_info.bits_per_pixel == 8)
|
|
|
if (image_info->compression != NoCompression)
|
|
|
{
|
|
|
size_t
|
|
|
length;
|
|
|
|
|
|
/*
|
|
|
Convert run-length encoded raster pixels.
|
|
|
*/
|
|
|
length=2UL*(bytes_per_line+2UL)+2UL;
|
|
|
dib_data=(unsigned char *) AcquireQuantumMemory(length,
|
|
|
(image->rows+2UL)*sizeof(*dib_data));
|
|
|
if (dib_data == (unsigned char *) NULL)
|
|
|
{
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
}
|
|
|
dib_info.image_size=(unsigned int) EncodeImage(image,bytes_per_line,
|
|
|
pixels,dib_data);
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
pixels=dib_data;
|
|
|
dib_info.compression = BI_RLE8;
|
|
|
}
|
|
|
/*
|
|
|
Write DIB header.
|
|
|
*/
|
|
|
(void) WriteBlobLSBLong(image,dib_info.size);
|
|
|
(void) WriteBlobLSBLong(image,(unsigned int) dib_info.width);
|
|
|
(void) WriteBlobLSBLong(image,(unsigned int) dib_info.height);
|
|
|
(void) WriteBlobLSBShort(image,(unsigned short) dib_info.planes);
|
|
|
(void) WriteBlobLSBShort(image,dib_info.bits_per_pixel);
|
|
|
(void) WriteBlobLSBLong(image,dib_info.compression);
|
|
|
(void) WriteBlobLSBLong(image,dib_info.image_size);
|
|
|
(void) WriteBlobLSBLong(image,dib_info.x_pixels);
|
|
|
(void) WriteBlobLSBLong(image,dib_info.y_pixels);
|
|
|
(void) WriteBlobLSBLong(image,dib_info.number_colors);
|
|
|
(void) WriteBlobLSBLong(image,dib_info.colors_important);
|
|
|
if (image->storage_class == PseudoClass)
|
|
|
{
|
|
|
if (dib_info.bits_per_pixel <= 8)
|
|
|
{
|
|
|
unsigned char
|
|
|
*dib_colormap;
|
|
|
|
|
|
/*
|
|
|
Dump colormap to file.
|
|
|
*/
|
|
|
dib_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
|
|
|
(1UL << dib_info.bits_per_pixel),4*sizeof(*dib_colormap));
|
|
|
if (dib_colormap == (unsigned char *) NULL)
|
|
|
{
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
}
|
|
|
q=dib_colormap;
|
|
|
for (i=0; i < (ssize_t) MagickMin(image->colors,dib_info.number_colors); i++)
|
|
|
{
|
|
|
*q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].blue));
|
|
|
*q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].green));
|
|
|
*q++=ScaleQuantumToChar(ClampToQuantum(image->colormap[i].red));
|
|
|
*q++=(Quantum) 0x0;
|
|
|
}
|
|
|
for ( ; i < (ssize_t) (1L << dib_info.bits_per_pixel); i++)
|
|
|
{
|
|
|
*q++=(Quantum) 0x0;
|
|
|
*q++=(Quantum) 0x0;
|
|
|
*q++=(Quantum) 0x0;
|
|
|
*q++=(Quantum) 0x0;
|
|
|
}
|
|
|
(void) WriteBlob(image,(size_t) (4*(1 << dib_info.bits_per_pixel)),
|
|
|
dib_colormap);
|
|
|
dib_colormap=(unsigned char *) RelinquishMagickMemory(dib_colormap);
|
|
|
}
|
|
|
else
|
|
|
if ((dib_info.bits_per_pixel == 16) &&
|
|
|
(dib_info.compression == BI_BITFIELDS))
|
|
|
{
|
|
|
(void) WriteBlobLSBLong(image,0xf800);
|
|
|
(void) WriteBlobLSBLong(image,0x07e0);
|
|
|
(void) WriteBlobLSBLong(image,0x001f);
|
|
|
}
|
|
|
}
|
|
|
(void) WriteBlob(image,dib_info.image_size,pixels);
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
(void) CloseBlob(image);
|
|
|
return(MagickTrue);
|
|
|
}
|
