/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% BBBB M M PPPP %
% B B MM MM P P %
% BBBB M M M PPPP %
% B B M M P %
% BBBB M M P %
% %
% %
% Read/Write Microsoft Windows Bitmap Image Format. %
% %
% Software Design %
% John Cristy %
% Glenn Randers-Pehrson %
% December 2001 %
% %
% %
% Copyright 1999-2007 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 "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/color-private.h"
#include "magick/colorspace.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/log.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/profile.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#include "magick/transform.h"
/*
Macro definitions (from Windows wingdi.h).
*/
#undef BI_JPEG
#define BI_JPEG 4
#undef BI_PNG
#define BI_PNG 5
#if !defined(__WINDOWS__) || defined(__MINGW32__)
#define BI_RGB 0
#define BI_RLE8 1
#define BI_RLE4 2
#define BI_BITFIELDS 3
#define LCS_CALIBRATED_RBG 0
#define LCS_sRGB 1
#define LCS_WINDOWS_COLOR_SPACE 2
#define PROFILE_LINKED 3
#define PROFILE_EMBEDDED 4
#define LCS_GM_BUSINESS 1 /* Saturation */
#define LCS_GM_GRAPHICS 2 /* Relative */
#define LCS_GM_IMAGES 4 /* Perceptual */
#define LCS_GM_ABS_COLORIMETRIC 8 /* Absolute */
#endif
/*
Typedef declarations.
*/
typedef struct _BMPInfo
{
unsigned long
file_size,
ba_offset,
offset_bits,
size;
long
width,
height;
unsigned short
planes,
bits_per_pixel;
unsigned long
compression,
image_size,
x_pixels,
y_pixels,
number_colors,
red_mask,
green_mask,
blue_mask,
alpha_mask,
colors_important;
long
colorspace;
PrimaryInfo
red_primary,
green_primary,
blue_primary,
gamma_scale;
} BMPInfo;
/*
Forward declarations.
*/
static MagickBooleanType
WriteBMPImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 unsigned long compression,unsigned char *pixels)
%
% A description of each parameter follows:
%
% o image: The address of a structure of type Image.
%
% o compression: Zero means uncompressed. 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. A value of 3 means bitfields
% encoding.
%
% o pixels: The address of a byte (8 bits) array of pixel data created by
% the decoding process.
%
*/
static inline long MagickAbsoluteValue(const long x)
{
if (x < 0)
return(-x);
return(x);
}
static inline size_t MagickMax(const size_t x,const size_t y)
{
if (x > y)
return(x);
return(y);
}
static inline long MagickMin(const long x,const long y)
{
if (x < y)
return(x);
return(y);
}
static MagickBooleanType DecodeImage(Image *image,
const unsigned long compression,unsigned char *pixels)
{
int
count;
long
y;
MagickBooleanType
status;
register long
i,
x;
register unsigned char
*p,
*q;
unsigned char
byte;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(pixels != (unsigned char *) NULL);
(void) ResetMagickMemory(pixels,0,(size_t) image->columns*image->rows*
sizeof(*pixels));
byte=0;
x=0;
p=pixels;
q=pixels+(size_t) image->columns*image->rows;
for (y=0; y < (long) image->rows; )
{
if ((p < pixels) || (p >= q))
break;
count=ReadBlobByte(image);
if (count == EOF)
break;
if (count != 0)
{
/*
Encoded mode.
*/
count=MagickMin(count,(int) (q-p));
byte=(unsigned char) ReadBlobByte(image);
if (compression == BI_RLE8)
{
for (i=0; i < count; i++)
*p++=(unsigned char) byte;
}
else
{
for (i=0; i < count; i++)
*p++=(unsigned char)
((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
}
x+=count;
}
else
{
/*
Escape mode.
*/
count=ReadBlobByte(image);
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=MagickMin(count,(int) (q-p));
if (compression == BI_RLE8)
for (i=0; i < count; i++)
*p++=(unsigned char) ReadBlobByte(image);
else
for (i=0; i < count; i++)
{
if ((i & 0x01) == 0)
byte=(unsigned char) ReadBlobByte(image);
*p++=(unsigned char)
((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
}
x+=count;
/*
Read pad byte.
*/
if (compression == BI_RLE8)
{
if ((count & 0x01) != 0)
(void) ReadBlobByte(image);
}
else
if (((count & 0x03) == 1) || ((count & 0x03) == 2))
(void) ReadBlobByte(image);
break;
}
}
}
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
(void) ReadBlobByte(image); /* end of line */
(void) ReadBlobByte(image);
return(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 unsigned long 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 unsigned long bytes_per_line,
const unsigned char *pixels,unsigned char *compressed_pixels)
{
long
y;
MagickBooleanType
status;
register const unsigned char
*p;
register long
i,
x;
register unsigned char
*q;
/*
Runlength encode pixels.
*/
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
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 < (long) image->rows; y++)
{
for (x=0; x < (long) bytes_per_line; x+=i)
{
/*
Determine runlength.
*/
for (i=1; ((x+i) < (long) bytes_per_line); i++)
if ((i == 255) || (*(p+i) != *p))
break;
*q++=(unsigned char) i;
*q++=(*p);
p+=i;
}
/*
End of line.
*/
*q++=(unsigned char) 0x00;
*q++=(unsigned char) 0x00;
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
/*
End of bitmap.
*/
*q++=(unsigned char) 0x00;
*q++=(unsigned char) 0x01;
return((size_t) (q-compressed_pixels));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s B M P %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsBMP() returns MagickTrue if the image format type, identified by the
% magick string, is BMP.
%
% The format of the IsBMP method is:
%
% MagickBooleanType IsBMP(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: This string is generally the first few bytes of an image file
% or blob.
%
% o length: Specifies the length of the magick string.
%
*/
static MagickBooleanType IsBMP(const unsigned char *magick,const size_t length)
{
if (length < 2)
return(MagickFalse);
if ((LocaleNCompare((char *) magick,"BA",2) == 0) ||
(LocaleNCompare((char *) magick,"BM",2) == 0) ||
(LocaleNCompare((char *) magick,"IC",2) == 0) ||
(LocaleNCompare((char *) magick,"PI",2) == 0) ||
(LocaleNCompare((char *) magick,"CI",2) == 0) ||
(LocaleNCompare((char *) magick,"CP",2) == 0))
return(MagickTrue);
return(MagickFalse);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d B M P I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBMPImage() reads a Microsoft Windows bitmap image file, Version
% 2, 3 (for Windows or NT), or 4, 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 ReadBMPImage method is:
%
% image=ReadBMPImage(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 *ReadBMPImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
BMPInfo
bmp_info;
Image
*image;
IndexPacket
index;
long
y;
MagickBooleanType
status;
MagickOffsetType
offset,
start_position;
register IndexPacket
*indexes;
register long
x;
register PixelPacket
*q;
register long
i;
register unsigned char
*p;
ssize_t
count;
size_t
length;
unsigned char
magick[12],
*pixels;
unsigned long
bit,
blue,
bytes_per_line,
green,
opacity,
red;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Determine if this is a BMP file.
*/
(void) ResetMagickMemory(&bmp_info,0,sizeof(bmp_info));
bmp_info.ba_offset=0;
start_position=0;
count=ReadBlob(image,2,magick);
do
{
LongPixelPacket
shift;
PixelPacket
quantum_bits;
unsigned long
profile_data,
profile_size;
/*
Verify BMP identifier.
*/
if (bmp_info.ba_offset == 0)
start_position=TellBlob(image)-2;
bmp_info.ba_offset=0;
while (LocaleNCompare((char *) magick,"BA",2) == 0)
{
bmp_info.file_size=ReadBlobLSBLong(image);
bmp_info.ba_offset=ReadBlobLSBLong(image);
bmp_info.offset_bits=ReadBlobLSBLong(image);
count=ReadBlob(image,2,magick);
if (count != 2)
break;
}
if (image->debug != MagickFalse)
(void) LogMagickEvent(CoderEvent,GetMagickModule()," Magick: %c%c",
magick[0],magick[1]);
if ((count == 0) || ((LocaleNCompare((char *) magick,"BM",2) != 0) &&
(LocaleNCompare((char *) magick,"CI",2) != 0)))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
bmp_info.file_size=ReadBlobLSBLong(image);
(void) ReadBlobLSBLong(image);
bmp_info.offset_bits=ReadBlobLSBLong(image);
bmp_info.size=ReadBlobLSBLong(image);
if (image->debug != MagickFalse)
(void) LogMagickEvent(CoderEvent,GetMagickModule()," BMP size: %lu",
bmp_info.size);
if (bmp_info.size == 12)
{
/*
OS/2 BMP image file.
*/
bmp_info.width=(short) ReadBlobLSBShort(image);
bmp_info.height=(short) ReadBlobLSBShort(image);
bmp_info.planes=ReadBlobLSBShort(image);
bmp_info.bits_per_pixel=ReadBlobLSBShort(image);
bmp_info.x_pixels=0;
bmp_info.y_pixels=0;
bmp_info.number_colors=0;
bmp_info.compression=BI_RGB;
bmp_info.image_size=0;
bmp_info.alpha_mask=0;
if (image->debug != MagickFalse)
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Format: OS/2 Bitmap");
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Geometry: %ldx%ld",bmp_info.width,bmp_info.height);
}
}
else
{
/*
Microsoft Windows BMP image file.
*/
if (bmp_info.size < 40)
ThrowReaderException(CorruptImageError,"NonOS2HeaderSizeError");
bmp_info.width=(long) ReadBlobLSBLong(image);
bmp_info.height=(long) ReadBlobLSBLong(image);
bmp_info.planes=ReadBlobLSBShort(image);
bmp_info.bits_per_pixel=ReadBlobLSBShort(image);
bmp_info.compression=ReadBlobLSBLong(image);
bmp_info.image_size=ReadBlobLSBLong(image);
bmp_info.x_pixels=ReadBlobLSBLong(image);
bmp_info.y_pixels=ReadBlobLSBLong(image);
bmp_info.number_colors=ReadBlobLSBLong(image);
bmp_info.colors_important=ReadBlobLSBLong(image);
profile_data=0;
profile_size=0;
if (image->debug != MagickFalse)
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Format: MS Windows bitmap");
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Geometry: %ldx%ld",bmp_info.width,bmp_info.height);
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Bits per pixel: %d",bmp_info.bits_per_pixel);
switch ((int) bmp_info.compression)
{
case BI_RGB:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: BI_RGB");
break;
}
case BI_RLE4:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: BI_RLE4");
break;
}
case BI_RLE8:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: BI_RLE8");
break;
}
case BI_BITFIELDS:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: BI_BITFIELDS");
break;
}
case BI_PNG:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: BI_PNG");
break;
}
case BI_JPEG:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: BI_JPEG");
break;
}
default:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: UNKNOWN (%lu)",bmp_info.compression);
}
}
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Number of colors: %lu",bmp_info.number_colors);
}
bmp_info.red_mask=ReadBlobLSBLong(image);
bmp_info.green_mask=ReadBlobLSBLong(image);
bmp_info.blue_mask=ReadBlobLSBLong(image);
if (bmp_info.size > 40)
{
double
sum;
/*
Read color management information.
*/
bmp_info.alpha_mask=ReadBlobLSBLong(image);
bmp_info.colorspace=(long) ReadBlobLSBLong(image);
/*
Decode 2^30 fixed point formatted CIE primaries.
*/
bmp_info.red_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.red_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.red_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.green_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.green_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.green_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.blue_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.blue_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
bmp_info.blue_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
sum=bmp_info.red_primary.x+bmp_info.red_primary.x+
bmp_info.red_primary.z;
image->chromaticity.red_primary.x/=sum;
image->chromaticity.red_primary.y/=sum;
sum=bmp_info.green_primary.x+bmp_info.green_primary.x+
bmp_info.green_primary.z;
image->chromaticity.green_primary.x/=sum;
image->chromaticity.green_primary.y/=sum;
sum=bmp_info.blue_primary.x+bmp_info.blue_primary.x+
bmp_info.blue_primary.z;
image->chromaticity.blue_primary.x/=sum;
image->chromaticity.blue_primary.y/=sum;
/*
Decode 16^16 fixed point formatted gamma_scales.
*/
bmp_info.gamma_scale.x=(double) ReadBlobLSBLong(image)/0xffff;
bmp_info.gamma_scale.y=(double) ReadBlobLSBLong(image)/0xffff;
bmp_info.gamma_scale.z=(double) ReadBlobLSBLong(image)/0xffff;
/*
Compute a single gamma from the BMP 3-channel gamma.
*/
image->gamma=(bmp_info.gamma_scale.x+bmp_info.gamma_scale.y+
bmp_info.gamma_scale.z)/3.0;
}
if (bmp_info.size > 108)
{
unsigned long
intent;
/*
Read BMP Version 5 color management information.
*/
intent=ReadBlobLSBLong(image);
switch ((int) intent)
{
case LCS_GM_BUSINESS:
{
image->rendering_intent=SaturationIntent;
break;
}
case LCS_GM_GRAPHICS:
{
image->rendering_intent=RelativeIntent;
break;
}
case LCS_GM_IMAGES:
{
image->rendering_intent=PerceptualIntent;
break;
}
case LCS_GM_ABS_COLORIMETRIC:
{
image->rendering_intent=AbsoluteIntent;
break;
}
}
profile_data=ReadBlobLSBLong(image);
profile_size=ReadBlobLSBLong(image);
(void) ReadBlobLSBLong(image); /* Reserved byte */
}
}
if ((bmp_info.compression != BI_RGB) &&
((MagickSizeType) bmp_info.file_size != GetBlobSize(image)))
(void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
"LengthAndFilesizeDoNotMatch","`%s'",image->filename);
if (bmp_info.width <= 0)
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
if (bmp_info.height == 0)
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
if (bmp_info.planes != 1)
ThrowReaderException(CorruptImageError,"StaticPlanesValueNotEqualToOne");
if ((bmp_info.bits_per_pixel != 1) && (bmp_info.bits_per_pixel != 4) &&
(bmp_info.bits_per_pixel != 8) && (bmp_info.bits_per_pixel != 16) &&
(bmp_info.bits_per_pixel != 24) && (bmp_info.bits_per_pixel != 32))
ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
if (bmp_info.number_colors > (1UL << bmp_info.bits_per_pixel))
{
if (bmp_info.bits_per_pixel < 24)
ThrowReaderException(CorruptImageError,"UnrecognizedNumberOfColors");
bmp_info.number_colors=0;
}
if (bmp_info.compression > 3)
ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
if ((bmp_info.compression == 1) && (bmp_info.bits_per_pixel != 8))
ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
if ((bmp_info.compression == 2) && (bmp_info.bits_per_pixel != 4))
ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
if ((bmp_info.compression == 3) && (bmp_info.bits_per_pixel < 16))
ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
switch (bmp_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=(unsigned long) MagickAbsoluteValue(bmp_info.width);
image->rows=(unsigned long) MagickAbsoluteValue(bmp_info.height);
image->depth=8;
image->matte=bmp_info.alpha_mask != 0 ? MagickTrue : MagickFalse;
if ((bmp_info.number_colors != 0) || (bmp_info.bits_per_pixel < 16))
{
image->storage_class=PseudoClass;
image->colors=bmp_info.number_colors;
if (image->colors == 0)
image->colors=1L << bmp_info.bits_per_pixel;
}
if (image->storage_class == PseudoClass)
{
unsigned char
*bmp_colormap;
size_t
packet_size;
/*
Read BMP raster colormap.
*/
if (image->debug != MagickFalse)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Reading colormap of %ld colors",image->colors);
if (AllocateImageColormap(image,image->colors) == MagickFalse)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
bmp_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
image->colors,4*sizeof(*bmp_colormap));
if (bmp_colormap == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
if ((bmp_info.size == 12) || (bmp_info.size == 64))
packet_size=3;
else
packet_size=4;
offset=SeekBlob(image,start_position+14+bmp_info.size,SEEK_SET);
if (offset < 0)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
count=ReadBlob(image,packet_size*image->colors,bmp_colormap);
if (count != (ssize_t) (packet_size*image->colors))
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
p=bmp_colormap;
for (i=0; i < (long) image->colors; i++)
{
image->colormap[i].blue=ScaleCharToQuantum(*p++);
image->colormap[i].green=ScaleCharToQuantum(*p++);
image->colormap[i].red=ScaleCharToQuantum(*p++);
if (packet_size == 4)
p++;
}
bmp_colormap=(unsigned char *) RelinquishMagickMemory(bmp_colormap);
}
if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
break;
/*
Read image data.
*/
if (SetImageExtent(image,0,0) == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
offset=SeekBlob(image,start_position+bmp_info.offset_bits,SEEK_SET);
if (offset < 0)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
if (bmp_info.compression == BI_RLE4)
bmp_info.bits_per_pixel<<=1;
bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
length=(size_t) bytes_per_line*image->rows;
pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->rows,
MagickMax(bytes_per_line,image->columns+256UL)*sizeof(*pixels));
if (pixels == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
if ((bmp_info.compression == BI_RGB) ||
(bmp_info.compression == BI_BITFIELDS))
{
if (image->debug != MagickFalse)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Reading pixels (%ld bytes)",(long) length);
count=ReadBlob(image,length,pixels);
if (count != (ssize_t) length)
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
}
else
{
/*
Convert run-length encoded raster pixels.
*/
status=DecodeImage(image,bmp_info.compression,pixels);
if (status == MagickFalse)
ThrowReaderException(CorruptImageError,
"UnableToRunlengthDecodeImage");
}
/*
Initialize image structure.
*/
image->x_resolution=(double) bmp_info.x_pixels/100.0;
image->y_resolution=(double) bmp_info.y_pixels/100.0;
image->units=PixelsPerCentimeterResolution;
/*
Convert BMP raster image to pixel packets.
*/
if (bmp_info.compression == BI_RGB)
{
bmp_info.alpha_mask=0;
bmp_info.red_mask=0x00ff0000UL;
bmp_info.green_mask=0x0000ff00UL;
bmp_info.blue_mask=0x000000ffUL;
if (bmp_info.bits_per_pixel == 16)
{
/*
RGB555.
*/
bmp_info.red_mask=0x00007c00UL;
bmp_info.green_mask=0x000003e0UL;
bmp_info.blue_mask=0x0000001fUL;
}
}
if ((bmp_info.bits_per_pixel == 16) || (bmp_info.bits_per_pixel == 32))
{
register unsigned long
sample;
/*
Get shift and quantum bits info from bitfield masks.
*/
(void) ResetMagickMemory(&shift,0,sizeof(shift));
(void) ResetMagickMemory(&quantum_bits,0,sizeof(quantum_bits));
if (bmp_info.red_mask != 0)
while (((bmp_info.red_mask << shift.red) & 0x80000000UL) == 0)
shift.red++;
if (bmp_info.green_mask != 0)
while (((bmp_info.green_mask << shift.green) & 0x80000000UL) == 0)
shift.green++;
if (bmp_info.blue_mask != 0)
while (((bmp_info.blue_mask << shift.blue) & 0x80000000UL) == 0)
shift.blue++;
if (bmp_info.alpha_mask != 0)
while (((bmp_info.alpha_mask << shift.opacity) & 0x80000000UL) == 0)
shift.opacity++;
sample=shift.red;
while (((bmp_info.red_mask << sample) & 0x80000000UL) != 0)
sample++;
quantum_bits.red=(Quantum) (sample-shift.red);
sample=shift.green;
while (((bmp_info.green_mask << sample) & 0x80000000UL) != 0)
sample++;
quantum_bits.green=(Quantum) (sample-shift.green);
sample=shift.blue;
while (((bmp_info.blue_mask << sample) & 0x80000000UL) != 0)
sample++;
quantum_bits.blue=(Quantum) (sample-shift.blue);
sample=shift.opacity;
while (((bmp_info.alpha_mask << sample) & 0x80000000UL) != 0)
sample++;
quantum_bits.opacity=(Quantum) (sample-shift.opacity);
}
switch (bmp_info.bits_per_pixel)
{
case 1:
{
/*
Convert bitmap scanline.
*/
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+(image->rows-y-1)*bytes_per_line;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
for (x=0; x < ((long) image->columns-7); x+=8)
{
for (bit=0; bit < 8; bit++)
{
index=(IndexPacket) (((*p) & (0x80 >> bit)) != 0 ? 0x01 : 0x00);
indexes[x+bit]=index;
*q++=image->colormap[(long) index];
}
p++;
}
if ((image->columns % 8) != 0)
{
for (bit=0; bit < (image->columns % 8); bit++)
{
index=(IndexPacket) (((*p) & (0x80 >> bit)) != 0 ? 0x01 : 0x00);
indexes[x+bit]=index;
*q++=image->colormap[(long) index];
}
p++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 4:
{
/*
Convert PseudoColor scanline.
*/
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+(image->rows-y-1)*bytes_per_line;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
for (x=0; x < ((long) image->columns-1); x+=2)
{
index=ConstrainColormapIndex(image,(*p >> 4) & 0x0f);
indexes[x]=index;
*q++=image->colormap[(long) index];
index=ConstrainColormapIndex(image,*p & 0x0f);
indexes[x+1]=index;
*q++=image->colormap[(long) index];
p++;
}
if ((image->columns % 2) != 0)
{
index=ConstrainColormapIndex(image,(*p >> 4) & 0xf);
indexes[x]=index;
*q++=image->colormap[(long) index];
p++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 8:
{
/*
Convert PseudoColor scanline.
*/
if ((bmp_info.compression == BI_RLE8) ||
(bmp_info.compression == BI_RLE4))
bytes_per_line=image->columns;
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+(image->rows-y-1)*bytes_per_line;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
for (x = (long)image->columns; x != 0; --x)
{
index=ConstrainColormapIndex(image,*p);
*indexes++=index;
*q=image->colormap[(long) index];
p++;
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
offset=(MagickOffsetType) (image->rows-y-1);
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(offset,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,offset,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 16:
{
unsigned long
pixel;
/*
Convert bitfield encoded 16-bit PseudoColor scanline.
*/
if (bmp_info.compression != BI_RGB &&
bmp_info.compression != BI_BITFIELDS)
ThrowReaderException(CorruptImageError,
"UnrecognizedImageCompression");
bytes_per_line=2*(image->columns+image->columns%2);
image->storage_class=DirectClass;
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+(image->rows-y-1)*bytes_per_line;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
pixel=(unsigned long) (*p++);
pixel|=(*p++) << 8;
red=((pixel & bmp_info.red_mask) << shift.red) >> 16;
if (quantum_bits.red == 5)
red|=((red & 0xe000) >> 5);
if (quantum_bits.red <= 8)
red|=((red & 0xff00) >> 8);
green=((pixel & bmp_info.green_mask) << shift.green) >> 16;
if (quantum_bits.green == 5)
green|=((green & 0xe000) >> 5);
if (quantum_bits.green == 6)
green|=((green & 0xc000) >> 6);
if (quantum_bits.green <= 8)
green|=((green & 0xff00) >> 8);
blue=((pixel & bmp_info.blue_mask) << shift.blue) >> 16;
if (quantum_bits.blue == 5)
blue|=((blue & 0xe000) >> 5);
if (quantum_bits.blue <= 8)
blue|=((blue & 0xff00) >> 8);
q->red=ScaleShortToQuantum((unsigned short) red);
q->green=ScaleShortToQuantum((unsigned short) green);
q->blue=ScaleShortToQuantum((unsigned short) blue);
if (image->matte != MagickFalse)
{
opacity=((pixel & bmp_info.alpha_mask) << shift.opacity) >> 16;
if (quantum_bits.opacity <= 8)
opacity|=((opacity & 0xff00) >> 8);
q->opacity=ScaleShortToQuantum((unsigned short) opacity);
}
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
offset=(MagickOffsetType) (image->rows-y-1);
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(offset,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,offset,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 24:
{
/*
Convert DirectColor scanline.
*/
bytes_per_line=4*((image->columns*24+31)/32);
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+(image->rows-y-1)*bytes_per_line;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->blue=ScaleCharToQuantum(*p++);
q->green=ScaleCharToQuantum(*p++);
q->red=ScaleCharToQuantum(*p++);
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
offset=(MagickOffsetType) (image->rows-y-1);
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(offset,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,offset,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 32:
{
/*
Convert bitfield encoded DirectColor scanline.
*/
if ((bmp_info.compression != BI_RGB) &&
(bmp_info.compression != BI_BITFIELDS))
ThrowReaderException(CorruptImageError,
"UnrecognizedImageCompression");
bytes_per_line=4*(image->columns);
for (y=(long) image->rows-1; y >= 0; y--)
{
unsigned long
pixel;
p=pixels+(image->rows-y-1)*bytes_per_line;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
pixel=(unsigned long) (*p++);
pixel|=(*p++ << 8);
pixel|=(*p++ << 16);
pixel|=(*p++ << 24);
red=((pixel & bmp_info.red_mask) << shift.red) >> 16;
if (quantum_bits.red == 8)
red|=(red >> 8);
green=((pixel & bmp_info.green_mask) << shift.green) >> 16;
if (quantum_bits.green == 8)
green|=(green >> 8);
blue=((pixel & bmp_info.blue_mask) << shift.blue) >> 16;
if (quantum_bits.blue == 8)
blue|=(blue >> 8);
if (image->matte != MagickFalse)
{
opacity=((pixel & bmp_info.alpha_mask) << shift.opacity) >> 16;
if (quantum_bits.opacity == 8)
opacity|=(opacity >> 8);
q->opacity=ScaleShortToQuantum((unsigned short) opacity);
}
q->red=ScaleShortToQuantum((unsigned short) red);
q->green=ScaleShortToQuantum((unsigned short) green);
q->blue=ScaleShortToQuantum((unsigned short) blue);
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
offset=(MagickOffsetType) (image->rows-y-1);
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(offset,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,offset,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
default:
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
}
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
if (EOFBlob(image) != MagickFalse)
{
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
break;
}
if (bmp_info.height < 0)
{
Image
*flipped_image;
/*
Correct image orientation.
*/
flipped_image=FlipImage(image,exception);
if (flipped_image == (Image *) NULL)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
image=DestroyImage(image);
image=flipped_image;
}
/*
Proceed to next image.
*/
if (image_info->number_scenes != 0)
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
break;
*magick='\0';
if (bmp_info.ba_offset != 0)
{
offset=SeekBlob(image,(MagickOffsetType) bmp_info.ba_offset,SEEK_SET);
if (offset < 0)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
}
count=ReadBlob(image,2,magick);
if ((count == 2) && (IsBMP(magick,2) != MagickFalse))
{
/*
Acquire next image structure.
*/
AllocateNextImage(image_info,image);
if (GetNextImageInList(image) == (Image *) NULL)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
image=SyncNextImageInList(image);
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
status=image->progress_monitor(LoadImagesTag,TellBlob(image),
GetBlobSize(image),image->client_data);
if (status == MagickFalse)
break;
}
}
} while (IsBMP(magick,2) != MagickFalse);
CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r B M P I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterBMPImage() adds attributes for the BMP 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 RegisterBMPImage method is:
%
% unsigned long RegisterBMPImage(void)
%
*/
ModuleExport unsigned long RegisterBMPImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("BMP");
entry->decoder=(DecodeImageHandler *) ReadBMPImage;
entry->encoder=(EncodeImageHandler *) WriteBMPImage;
entry->magick=(IsImageFormatHandler *) IsBMP;
entry->description=ConstantString("Microsoft Windows bitmap image");
entry->module=ConstantString("BMP");
entry->adjoin=MagickFalse;
entry->seekable_stream=MagickTrue;
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("BMP2");
entry->encoder=(EncodeImageHandler *) WriteBMPImage;
entry->magick=(IsImageFormatHandler *) IsBMP;
entry->description=ConstantString("Microsoft Windows bitmap image v2");
entry->module=ConstantString("BMP");
entry->adjoin=MagickFalse;
entry->seekable_stream=MagickTrue;
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("BMP3");
entry->encoder=(EncodeImageHandler *) WriteBMPImage;
entry->magick=(IsImageFormatHandler *) IsBMP;
entry->description=ConstantString("Microsoft Windows bitmap image v3");
entry->module=ConstantString("BMP");
entry->adjoin=MagickFalse;
entry->seekable_stream=MagickTrue;
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r B M P I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterBMPImage() removes format registrations made by the
% BMP module from the list of supported formats.
%
% The format of the UnregisterBMPImage method is:
%
% UnregisterBMPImage(void)
%
*/
ModuleExport void UnregisterBMPImage(void)
{
(void) UnregisterMagickInfo("BMP");
(void) UnregisterMagickInfo("BMP2");
(void) UnregisterMagickInfo("BMP3");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e B M P I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBMPImage() writes an image in Microsoft Windows bitmap encoded
% image format, version 3 for Windows or (if the image has a matte channel)
% version 4.
%
% The format of the WriteBMPImage method is:
%
% MagickBooleanType WriteBMPImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o image_info: The image info.
%
% o image: The image.
%
*/
static MagickBooleanType WriteBMPImage(const ImageInfo *image_info,Image *image)
{
BMPInfo
bmp_info;
const StringInfo
*profile;
long
y;
MagickBooleanType
have_color_info,
status;
MagickOffsetType
scene;
register const PixelPacket
*p;
register IndexPacket
*indexes;
register long
i,
x;
register unsigned char
*q;
unsigned char
*bmp_data,
*pixels;
unsigned long
bytes_per_line,
type;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == MagickFalse)
return(status);
type=4;
if (LocaleCompare(image_info->magick,"BMP2") == 0)
type=2;
else
if (LocaleCompare(image_info->magick,"BMP3") == 0)
type=3;
scene=0;
do
{
/*
Initialize BMP raster file header.
*/
if (image_info->colorspace == UndefinedColorspace)
(void) SetImageColorspace(image,RGBColorspace);
(void) ResetMagickMemory(&bmp_info,0,sizeof(bmp_info));
bmp_info.file_size=14+12;
if (type > 2)
bmp_info.file_size+=28;
bmp_info.offset_bits=bmp_info.file_size;
bmp_info.compression=BI_RGB;
if ((image->storage_class == PseudoClass) && (image->colors > 256))
(void) SetImageStorageClass(image,DirectClass);
if (image->storage_class != DirectClass)
{
/*
Colormapped BMP raster.
*/
bmp_info.bits_per_pixel=8;
if (image->colors <= 2)
bmp_info.bits_per_pixel=1;
else
if (image->colors <= 16)
bmp_info.bits_per_pixel=4;
else
if (image->colors <= 256)
bmp_info.bits_per_pixel=8;
if (image->compression == RLECompression)
bmp_info.bits_per_pixel=8;
bmp_info.number_colors=1UL << bmp_info.bits_per_pixel;
if (image->matte != MagickFalse)
(void) SetImageStorageClass(image,DirectClass);
else
if (bmp_info.number_colors < image->colors)
(void) SetImageStorageClass(image,DirectClass);
else
{
bmp_info.file_size+=3*(1UL << bmp_info.bits_per_pixel);
bmp_info.offset_bits+=3*(1UL << bmp_info.bits_per_pixel);
if (type > 2)
{
bmp_info.file_size+=(1UL << bmp_info.bits_per_pixel);
bmp_info.offset_bits+=(1UL << bmp_info.bits_per_pixel);
}
}
}
if (image->storage_class == DirectClass)
{
/*
Full color BMP raster.
*/
bmp_info.number_colors=0;
bmp_info.bits_per_pixel=(unsigned short)
((type > 3) && (image->matte != MagickFalse) ? 32 : 24);
bmp_info.compression=(unsigned int) ((type > 3) &&
(image->matte != MagickFalse) ? BI_BITFIELDS : BI_RGB);
}
bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
bmp_info.ba_offset=0;
profile=GetImageProfile(image,"icc");
have_color_info=(image->rendering_intent != UndefinedIntent) ||
(profile != (StringInfo *) NULL) || (image->gamma != 0.0) ? MagickTrue :
MagickFalse;
if (type == 2)
bmp_info.size=12;
else
if ((type == 3) || ((image->matte == MagickFalse) &&
(have_color_info == MagickFalse)))
{
type=3;
bmp_info.size=40;
}
else
{
int
extra_size;
bmp_info.size=108;
extra_size=68;
if ((image->rendering_intent != UndefinedIntent) ||
(profile != (StringInfo *) NULL))
{
bmp_info.size=124;
extra_size+=16;
}
bmp_info.file_size+=extra_size;
bmp_info.offset_bits+=extra_size;
}
bmp_info.width=(long) image->columns;
bmp_info.height=(long) image->rows;
bmp_info.planes=1;
bmp_info.image_size=bytes_per_line*image->rows;
bmp_info.file_size+=bmp_info.image_size;
bmp_info.x_pixels=75*39;
bmp_info.y_pixels=75*39;
switch (image->units)
{
case UndefinedResolution:
case PixelsPerInchResolution:
{
bmp_info.x_pixels=(unsigned long) (100.0*image->x_resolution/2.54);
bmp_info.y_pixels=(unsigned long) (100.0*image->y_resolution/2.54);
break;
}
case PixelsPerCentimeterResolution:
{
bmp_info.x_pixels=(unsigned long) (100.0*image->x_resolution);
bmp_info.y_pixels=(unsigned long) (100.0*image->y_resolution);
break;
}
}
bmp_info.colors_important=bmp_info.number_colors;
/*
Convert MIFF to BMP raster pixels.
*/
pixels=(unsigned char *) AcquireQuantumMemory((size_t) bmp_info.image_size,
sizeof(*pixels));
if (pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
(void) ResetMagickMemory(pixels,0,(size_t) bmp_info.image_size);
switch (bmp_info.bits_per_pixel)
{
case 1:
{
unsigned long
bit,
byte;
/*
Convert PseudoClass image to a BMP monochrome image.
*/
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
q=pixels+(image->rows-y-1)*bytes_per_line;
bit=0;
byte=0;
for (x=0; x < (long) image->columns; x++)
{
byte<<=1;
byte|=indexes[x] != 0 ? 0x01 : 0x00;
bit++;
if (bit == 8)
{
*q++=(unsigned char) byte;
bit=0;
byte=0;
}
}
if (bit != 0)
{
*q++=(unsigned char) (byte << (8-bit));
x++;
}
for (x=(long) (image->columns+7)/8; x < (long) bytes_per_line; x++)
*q++=0x00;
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 4:
{
unsigned long
nibble,
byte;
/*
Convert PseudoClass image to a BMP monochrome image.
*/
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
q=pixels+(image->rows-y-1)*bytes_per_line;
nibble=0;
byte=0;
for (x=0; x < (long) image->columns; x++)
{
byte<<=4;
byte|=((unsigned long) indexes[x] & 0x0f);
nibble++;
if (nibble == 2)
{
*q++=(unsigned char) byte;
nibble=0;
byte=0;
}
}
if (nibble != 0)
{
*q++=(unsigned char) (byte << 4);
x++;
}
for (x=(long) (image->columns+1)/2; x < (long) bytes_per_line; x++)
*q++=0x00;
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 8:
{
/*
Convert PseudoClass packet to BMP pixel.
*/
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
q=pixels+(image->rows-y-1)*bytes_per_line;
for (x=0; x < (long) image->columns; x++)
*q++=(unsigned char) indexes[x];
for ( ; x < (long) bytes_per_line; x++)
*q++=0x00;
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
case 24:
case 32:
{
/*
Convert DirectClass packet to BMP BGR888 or BGRA8888 pixel.
*/
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
q=pixels+(image->rows-y-1)*bytes_per_line;
for (x=0; x < (long) image->columns; x++)
{
*q++=ScaleQuantumToChar(p->blue);
*q++=ScaleQuantumToChar(p->green);
*q++=ScaleQuantumToChar(p->red);
if (bmp_info.bits_per_pixel == 32)
*q++=ScaleQuantumToChar(p->opacity);
p++;
}
if (bmp_info.bits_per_pixel == 24)
for (x=3L*(long) image->columns; x < (long) bytes_per_line; x++)
*q++=0x00;
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
break;
}
}
if ((type > 2) && (bmp_info.bits_per_pixel == 8))
if (image->compression != NoCompression)
{
size_t
length;
/*
Convert run-length encoded raster pixels.
*/
length=(size_t) (2*(bytes_per_line+2)*(image->rows+2)+2);
bmp_data=(unsigned char *) NULL;
if (~length >= bytes_per_line)
bmp_data=(unsigned char *) AcquireQuantumMemory(length+
bytes_per_line,sizeof(*bmp_data));
if (bmp_data == (unsigned char *) NULL)
{
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
}
bmp_info.file_size-=bmp_info.image_size;
bmp_info.image_size=(unsigned long) EncodeImage(image,
bytes_per_line,pixels,bmp_data);
bmp_info.file_size+=bmp_info.image_size;
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
pixels=bmp_data;
bmp_info.compression=BI_RLE8;
}
/*
Write BMP for Windows, all versions, 14-byte header.
*/
if (image->debug != MagickFalse)
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Writing BMP version %ld datastream",type);
if (image->storage_class == DirectClass)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Storage class=DirectClass");
else
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Storage class=PseudoClass");
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Image depth=%lu",image->depth);
if (image->matte != MagickFalse)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Matte=True");
else
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Matte=MagickFalse");
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" BMP bits_per_pixel=%d",bmp_info.bits_per_pixel);
switch ((int) bmp_info.compression)
{
case BI_RGB:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression=BI_RGB");
break;
}
case BI_RLE8:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression=BI_RLE8");
break;
}
case BI_BITFIELDS:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression=BI_BITFIELDS");
break;
}
default:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression=UNKNOWN (%lu)",bmp_info.compression);
break;
}
}
if (bmp_info.number_colors == 0)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Number_colors=unspecified");
else
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Number_colors=%lu",bmp_info.number_colors);
}
(void) WriteBlob(image,2,(unsigned char *) "BM");
(void) WriteBlobLSBLong(image,bmp_info.file_size);
(void) WriteBlobLSBLong(image,bmp_info.ba_offset); /* always 0 */
(void) WriteBlobLSBLong(image,bmp_info.offset_bits);
if (type == 2)
{
/*
Write 12-byte version 2 bitmap header.
*/
(void) WriteBlobLSBLong(image,bmp_info.size);
(void) WriteBlobLSBShort(image,(unsigned short) bmp_info.width);
(void) WriteBlobLSBShort(image,(unsigned short) bmp_info.height);
(void) WriteBlobLSBShort(image,bmp_info.planes);
(void) WriteBlobLSBShort(image,bmp_info.bits_per_pixel);
}
else
{
/*
Write 40-byte version 3+ bitmap header.
*/
(void) WriteBlobLSBLong(image,bmp_info.size);
(void) WriteBlobLSBLong(image,(unsigned long) bmp_info.width);
(void) WriteBlobLSBLong(image,(unsigned long) bmp_info.height);
(void) WriteBlobLSBShort(image,bmp_info.planes);
(void) WriteBlobLSBShort(image,bmp_info.bits_per_pixel);
(void) WriteBlobLSBLong(image,bmp_info.compression);
(void) WriteBlobLSBLong(image,bmp_info.image_size);
(void) WriteBlobLSBLong(image,bmp_info.x_pixels);
(void) WriteBlobLSBLong(image,bmp_info.y_pixels);
(void) WriteBlobLSBLong(image,bmp_info.number_colors);
(void) WriteBlobLSBLong(image,bmp_info.colors_important);
}
if ((type > 3) && ((image->matte != MagickFalse) ||
(have_color_info != MagickFalse)))
{
/*
Write the rest of the 108-byte BMP Version 4 header.
*/
(void) WriteBlobLSBLong(image,0x00ff0000UL); /* Red mask */
(void) WriteBlobLSBLong(image,0x0000ff00UL); /* Green mask */
(void) WriteBlobLSBLong(image,0x000000ffUL); /* Blue mask */
(void) WriteBlobLSBLong(image,0xff000000UL); /* Alpha mask */
(void) WriteBlobLSBLong(image,0x00000001UL); /* CSType==Calib. RGB */
(void) WriteBlobLSBLong(image,(unsigned long)
image->chromaticity.red_primary.x*0x3ffffff);
(void) WriteBlobLSBLong(image,(unsigned long)
image->chromaticity.red_primary.y*0x3ffffff);
(void) WriteBlobLSBLong(image,(unsigned long)
(1.000f-(image->chromaticity.red_primary.x+
image->chromaticity.red_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,(unsigned long)
image->chromaticity.green_primary.x*0x3ffffff);
(void) WriteBlobLSBLong(image,(unsigned long)
image->chromaticity.green_primary.y*0x3ffffff);
(void) WriteBlobLSBLong(image,(unsigned long)
(1.000f-(image->chromaticity.green_primary.x+
image->chromaticity.green_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,(unsigned long)
image->chromaticity.blue_primary.x*0x3ffffff);
(void) WriteBlobLSBLong(image,(unsigned long)
image->chromaticity.blue_primary.y*0x3ffffff);
(void) WriteBlobLSBLong(image,(unsigned long)
(1.000f-(image->chromaticity.blue_primary.x+
image->chromaticity.blue_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,(unsigned long)
bmp_info.gamma_scale.x*0xffff);
(void) WriteBlobLSBLong(image,(unsigned long)
bmp_info.gamma_scale.y*0xffff);
(void) WriteBlobLSBLong(image,(unsigned long)
bmp_info.gamma_scale.z*0xffff);
if ((image->rendering_intent != UndefinedIntent) ||
(profile != (StringInfo *) NULL))
{
long
intent;
switch ((int) image->rendering_intent)
{
case SaturationIntent:
{
intent=LCS_GM_BUSINESS;
break;
}
case RelativeIntent:
{
intent=LCS_GM_GRAPHICS;
break;
}
case PerceptualIntent:
{
intent=LCS_GM_IMAGES;
break;
}
case AbsoluteIntent:
{
intent=LCS_GM_ABS_COLORIMETRIC;
break;
}
default:
{
intent=0;
break;
}
}
(void) WriteBlobLSBLong(image,(unsigned long) intent);
(void) WriteBlobLSBLong(image,0x00); /* dummy profile data */
(void) WriteBlobLSBLong(image,0x00); /* dummy profile length */
(void) WriteBlobLSBLong(image,0x00); /* reserved */
}
}
if (image->storage_class == PseudoClass)
{
unsigned char
*bmp_colormap;
/*
Dump colormap to file.
*/
if (image->debug != MagickFalse)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Colormap: %ld entries",image->colors);
bmp_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
(1UL << bmp_info.bits_per_pixel),4*sizeof(*bmp_colormap));
if (bmp_colormap == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
q=bmp_colormap;
for (i=0; i < (long) MagickMin((long) image->colors,(long) bmp_info.number_colors); i++)
{
*q++=ScaleQuantumToChar(image->colormap[i].blue);
*q++=ScaleQuantumToChar(image->colormap[i].green);
*q++=ScaleQuantumToChar(image->colormap[i].red);
if (type > 2)
*q++=(unsigned char) 0x0;
}
for ( ; i < (long) (1UL << bmp_info.bits_per_pixel); i++)
{
*q++=(unsigned char) 0x00;
*q++=(unsigned char) 0x00;
*q++=(unsigned char) 0x00;
if (type > 2)
*q++=(unsigned char) 0x00;
}
if (type <= 2)
(void) WriteBlob(image,(size_t) (3*(1L << bmp_info.bits_per_pixel)),
bmp_colormap);
else
(void) WriteBlob(image,(size_t) (4*(1L << bmp_info.bits_per_pixel)),
bmp_colormap);
bmp_colormap=(unsigned char *) RelinquishMagickMemory(bmp_colormap);
}
if (image->debug != MagickFalse)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Pixels: %lu bytes",bmp_info.image_size);
(void) WriteBlob(image,(size_t) bmp_info.image_size,pixels);
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
if (GetNextImageInList(image) == (Image *) NULL)
break;
image=SyncNextImageInList(image);
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
status=image->progress_monitor(SaveImagesTag,scene,
GetImageListLength(image),image->client_data);
if (status == MagickFalse)
break;
}
scene++;
} while (image_info->adjoin != MagickFalse);
CloseBlob(image);
return(MagickTrue);
}
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