/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- DecodeImage
- EncodeImage
- IsBMP
- ReadBMPImage
- RegisterBMPImage
- UnregisterBMPImage
- WriteBMPImage
/*
% Copyright (C) 2003 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
% Copyright 1991-1999 E. I. du Pont de Nemours and Company
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/colormap.h"
#include "magick/constitute.h"
#include "magick/log.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/pixel_cache.h"
#include "magick/profile.h"
#include "magick/transform.h"
#include "magick/utility.h"
/*
Macro definitions (from Windows wingdi.h).
*/
#undef BI_JPEG
#define BI_JPEG 4
#undef BI_PNG
#define BI_PNG 5
#if !defined(MSWINDOWS) || 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 unsigned int
WriteBMPImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% D e c o d e I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method DecodeImage unpacks the packed image pixels into runlength-encoded
% pixel packets.
%
% The format of the DecodeImage method is:
%
% unsigned int DecodeImage(Image *image,const unsigned long compression,
% unsigned char *pixels)
%
% A description of each parameter follows:
%
% o status: Method DecodeImage returns True if all the pixels are
% uncompressed without error, otherwise False.
%
% 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 unsigned int DecodeImage(Image *image,const unsigned long compression,
unsigned char *pixels)
{
long
byte,
count,
y;
register long
i,
x;
register unsigned char
*q;
unsigned char
*end;
assert(image != (Image *) NULL);
assert(pixels != (unsigned char *) NULL);
(void) LogMagickEvent(CoderEvent,GetMagickModule()," Decoding RLE pixels");
(void) memset(pixels,0,image->columns*image->rows);
byte=0;
x=0;
q=pixels;
end=pixels + (size_t) image->columns*image->rows;
for (y=0; y < (long) image->rows; )
{
if (q < pixels || q >= end)
break;
count=ReadBlobByte(image);
if (count == EOF)
break;
if (count != 0)
{
count=Min(count, end - q);
/*
Encoded mode.
*/
byte=ReadBlobByte(image);
if (compression == BI_RLE8)
{
for ( i=count; i != 0; --i )
{
*q++=(unsigned char) byte;
}
}
else
{
for ( i=0; i < count; i++ )
{
*q++=(unsigned char)
((i & 0x01) ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
}
}
x+=count;
}
else
{
/*
Escape mode.
*/
count=ReadBlobByte(image);
if (count == 0x01)
return(True);
switch ((int) count)
{
case 0x00:
{
/*
End of line.
*/
x=0;
y++;
q=pixels+y*image->columns;
break;
}
case 0x02:
{
/*
Delta mode.
*/
x+=ReadBlobByte(image);
y+=ReadBlobByte(image);
q=pixels+y*image->columns+x;
break;
}
default:
{
/*
Absolute mode.
*/
count=Min(count, end - q);
if (compression == BI_RLE8)
for (i=count; i != 0; --i)
*q++=ReadBlobByte(image);
else
for (i=0; i < count; i++)
{
if ((i & 0x01) == 0)
byte=ReadBlobByte(image);
*q++=(unsigned char)
((i & 0x01) ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
}
x+=count;
/*
Read pad byte.
*/
if (compression == BI_RLE8)
{
if (count & 0x01)
(void) ReadBlobByte(image);
}
else
if (((count & 0x03) == 1) || ((count & 0x03) == 2))
(void) ReadBlobByte(image);
break;
}
}
}
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
LoadImageText,image->filename,
image->columns,image->rows))
break;
}
(void) ReadBlobByte(image); /* end of line */
(void) ReadBlobByte(image);
return(True);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% E n c o d e I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method EncodeImage compresses pixels using a runlength encoded format.
%
% The format of the EncodeImage method is:
%
% static unsigned int EncodeImage(Image *image,
% const unsigned long bytes_per_line,const unsigned char *pixels,
% unsigned char *compressed_pixels)
%
% A description of each parameter follows:
%
% o status: Method EncodeImage returns the number of bytes in the
% runlength encoded compress_pixels array.
%
% o image: A pointer to an Image structure.
%
% 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;
register const unsigned char
*p;
register long
i,
x;
register unsigned char
*q;
/*
Runlength encode pixels.
*/
assert(image != (Image *) NULL);
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++=0x00;
*q++=0x00;
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
break;
}
/*
End of bitmap.
*/
*q++=0;
*q++=0x01;
return(q-compressed_pixels);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s B M P %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method IsBMP returns True if the image format type, identified by the
% magick string, is BMP.
%
% The format of the IsBMP method is:
%
% unsigned int IsBMP(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o status: Method IsBMP returns True if the image format type is BMP.
%
% 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 unsigned int IsBMP(const unsigned char *magick,const size_t length)
{
if (length < 2)
return(False);
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(True);
return(False);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d B M P I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method 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: Method ReadBMPImage returns a pointer to the image after
% reading. A null image is returned if there is a memory shortage or
% if the image cannot be read.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadBMPImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
BMPInfo
bmp_info;
Image
*image;
int
logging;
long
y;
unsigned long
blue,
green,
opacity,
red;
ExtendedSignedIntegralType
start_position;
register long
x;
register PixelPacket
*q;
register long
i;
register unsigned char
*p;
size_t
count,
length;
unsigned char
magick[12],
*pixels;
unsigned int
status;
unsigned long
bytes_per_line;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
logging=LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == False)
ThrowReaderException(FileOpenError,UnableToOpenFile,image);
/*
Determine if this is a BMP file.
*/
(void) memset(&bmp_info,0,sizeof(BMPInfo));
bmp_info.ba_offset=0;
start_position=0;
count=ReadBlob(image,2,(char *) magick);
do
{
PixelPacket
quantum_bits,
shift;
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,(char *) magick);
}
if (logging)
(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,image);
bmp_info.file_size=ReadBlobLSBLong(image);
(void) ReadBlobLSBLong(image);
bmp_info.offset_bits=ReadBlobLSBLong(image);
bmp_info.size=ReadBlobLSBLong(image);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" BMP size: %lu, File size: %lu",
bmp_info.size, (unsigned long) GetBlobSize(image));
if (bmp_info.size == 12)
{
/*
Windows 2.X or OS/2 BMP image file.
*/
bmp_info.width=(magick_int16_t) ReadBlobLSBShort(image);
bmp_info.height=(magick_int16_t) 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 (logging)
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Format: Windows 2.X or OS/2 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);
}
}
else
{
/*
Microsoft Windows 3.X or later BMP image file.
*/
if (bmp_info.size < 40)
ThrowReaderException(CorruptImageWarning,NonOS2HeaderSizeError,
image);
/*
BMP v3 defines width and hight as signed LONG (32 bit) values. If
height is a positive number, then the image is a "bottom-up"
bitmap with origin in the lower-left corner. If height is a
negative number, then the image is a "top-down" bitmap with the
origin in the upper-left corner. The meaning of negative values
is not defined for width.
*/
bmp_info.width=(magick_int32_t) ReadBlobLSBLong(image);
bmp_info.height=(magick_int32_t) 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 (logging)
{
(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_data=profile_data;
profile_size=ReadBlobLSBLong(image);
profile_size=profile_size;
(void) ReadBlobLSBLong(image); /* Reserved byte */
}
}
if ((bmp_info.compression != BI_RGB) &&
((magick_off_t) bmp_info.file_size != GetBlobSize(image)))
ThrowReaderException(CorruptImageError,LengthAndFilesizeDoNotMatch,
image);
if (bmp_info.width <= 0)
ThrowReaderException(CorruptImageWarning,NegativeOrZeroImageSize,image);
if (bmp_info.height == 0)
ThrowReaderException(CorruptImageWarning,NegativeOrZeroImageSize,image);
if ((bmp_info.height < 0) && (bmp_info.compression !=0))
ThrowReaderException(CorruptImageWarning,CompressionNotValid,image);
if (bmp_info.planes != 1)
ThrowReaderException(CorruptImageWarning,StaticPlanesValueNotEqualToOne,
image);
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(CorruptImageWarning,UnrecognizedBitsPerPixel,image);
if (bmp_info.number_colors > (1UL << bmp_info.bits_per_pixel))
{
if (bmp_info.bits_per_pixel<24)
ThrowReaderException(CorruptImageWarning,UnrecognizedNumberOfColors,image);
bmp_info.number_colors = 0;
}
if (bmp_info.compression > 3)
ThrowReaderException(CorruptImageWarning,UnrecognizedImageCompression,image);
if ((bmp_info.compression == 1) && (bmp_info.bits_per_pixel != 8))
ThrowReaderException(CorruptImageWarning,UnrecognizedBitsPerPixel,image);
if ((bmp_info.compression == 2) && (bmp_info.bits_per_pixel != 4))
ThrowReaderException(CorruptImageWarning,UnrecognizedBitsPerPixel,image);
if ((bmp_info.compression == 3) && (bmp_info.bits_per_pixel < 16))
ThrowReaderException(CorruptImageWarning,UnrecognizedBitsPerPixel,image);
switch ((unsigned int) bmp_info.compression)
{
case BI_RGB:
case BI_RLE8:
case BI_RLE4:
case BI_BITFIELDS:
break;
case BI_JPEG:
ThrowReaderException(CoderError,JPEGCompressionNotSupported,image)
case BI_PNG:
ThrowReaderException(CoderError,PNGCompressionNotSupported,image)
default:
ThrowReaderException(CorruptImageError,UnrecognizedImageCompression,
image)
}
image->columns=bmp_info.width;
image->rows=AbsoluteValue(bmp_info.height);
image->depth=8;
image->matte=bmp_info.alpha_mask != 0;
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;
unsigned int
packet_size;
/*
Read BMP raster colormap.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Reading colormap of %u colors",image->colors);
if (!AllocateImageColormap(image,image->colors))
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,
image);
bmp_colormap=MagickAllocateMemory(unsigned char *,4*image->colors);
if (bmp_colormap == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,
image);
if ((bmp_info.size == 12) || (bmp_info.size == 64))
packet_size=3;
else
packet_size=4;
if (SeekBlob(image,start_position+14+bmp_info.size,SEEK_SET) == -1)
ThrowReaderException(CorruptImageError,ImproperImageHeader,image)
(void) ReadBlob(image,packet_size*image->colors,(char *) bmp_colormap);
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++;
}
MagickFreeMemory(bmp_colormap);
}
if (image_info->ping && (image_info->subrange != 0))
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
/*
Read image data.
*/
if (SeekBlob(image,start_position+bmp_info.offset_bits,SEEK_SET) == -1)
ThrowReaderException(CorruptImageError,ImproperImageHeader,image)
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=bytes_per_line*image->rows;
pixels=MagickAllocateMemory(unsigned char *,
Max(bytes_per_line,image->columns+1)*image->rows);
if (pixels == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image);
if ((bmp_info.compression == BI_RGB) ||
(bmp_info.compression == BI_BITFIELDS))
{
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Reading pixels (%ld bytes)",(long) length);
(void) ReadBlob(image,length,(char *) pixels);
}
else
{
/*
Convert run-length encoded raster pixels.
*/
status=DecodeImage(image,bmp_info.compression,pixels);
if (status == False)
ThrowReaderException(CorruptImageError,UnableToRunlengthDecodeImage,
image);
}
/*
Initialize image structure.
*/
image->units=PixelsPerCentimeterResolution;
image->x_resolution=bmp_info.x_pixels/100.0;
image->y_resolution=bmp_info.y_pixels/100.0;
/*
Convert BMP raster image to pixel packets.
*/
if (bmp_info.compression == BI_RGB)
{
bmp_info.alpha_mask=0;
bmp_info.red_mask=0x00ff0000L;
bmp_info.green_mask=0x0000ff00L;
bmp_info.blue_mask=0x000000ffL;
if (bmp_info.bits_per_pixel == 16)
{
/*
RGB555.
*/
bmp_info.red_mask=0x00007c00L;
bmp_info.green_mask=0x000003e0L;
bmp_info.blue_mask=0x0000001fL;
}
}
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) memset(&shift,0,sizeof(PixelPacket));
(void) memset(&quantum_bits,0,sizeof(PixelPacket));
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;
if (ImportImagePixelArea(image,IndexQuantum,bmp_info.bits_per_pixel,p,0,0)
== MagickFail)
break;
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted(image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == False)
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;
if (ImportImagePixelArea(image,IndexQuantum,bmp_info.bits_per_pixel,p,0,0)
== MagickFail)
break;
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted(image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == False)
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;
if (ImportImagePixelArea(image,IndexQuantum,bmp_info.bits_per_pixel,p,0,0)
== MagickFail)
break;
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted(image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == False)
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,image)
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=(*p++);
pixel|=(*p++) << 8;
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 != False)
{
opacity=((pixel & bmp_info.alpha_mask) << shift.opacity) >> 16;
if (quantum_bits.opacity == 8)
opacity|=(opacity >> 8);
q->opacity=ScaleShortToQuantum(opacity);
}
q->red=ScaleShortToQuantum(red);
q->green=ScaleShortToQuantum(green);
q->blue=ScaleShortToQuantum(blue);
q++;
}
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted(image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == False)
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))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted(image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == False)
break;
}
}
break;
}
case 32:
{
/*
Convert bitfield encoded DirectColor scanline.
*/
if ((bmp_info.compression != BI_RGB) &&
(bmp_info.compression != BI_BITFIELDS))
ThrowReaderException(CorruptImageError,UnrecognizedImageCompression,image)
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=(*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 != False)
{
opacity=((pixel & bmp_info.alpha_mask) << shift.opacity) >> 16;
if (quantum_bits.opacity == 8)
opacity|=(opacity >> 8);
q->opacity=ScaleShortToQuantum(opacity);
}
q->red=ScaleShortToQuantum(red);
q->green=ScaleShortToQuantum(green);
q->blue=ScaleShortToQuantum(blue);
q++;
}
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted(image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == False)
break;
}
}
break;
}
default:
ThrowReaderException(CorruptImageError,ImproperImageHeader,image)
}
MagickFreeMemory(pixels);
if (EOFBlob(image))
{
ThrowException(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)
{
DestroyImageList(image);
return((Image *) NULL);
}
DestroyBlobInfo(flipped_image->blob);
flipped_image->blob=ReferenceBlob(image->blob);
DestroyImage(image);
image=flipped_image;
}
/*
Proceed to next image.
*/
if (image_info->subrange != 0)
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
*magick='\0';
if (bmp_info.ba_offset != 0)
if (SeekBlob(image,bmp_info.ba_offset,SEEK_SET) == -1)
ThrowReaderException(CorruptImageError,ImproperImageHeader,image)
(void) ReadBlob(image,2,(char *) magick);
if (IsBMP(magick,2))
{
/*
Acquire next image structure.
*/
AllocateNextImage(image_info,image);
if (image->next == (Image *) NULL)
{
DestroyImageList(image);
return((Image *) NULL);
}
image=SyncNextImageInList(image);
status=MagickMonitorFormatted(TellBlob(image),GetBlobSize(image),
exception,LoadImagesText,
image->filename);
if (status == False)
break;
}
} while (IsBMP(magick,2));
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),"return");
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r B M P I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method 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:
%
% RegisterBMPImage(void)
%
*/
ModuleExport void RegisterBMPImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("BMP");
entry->decoder=(DecoderHandler) ReadBMPImage;
entry->encoder=(EncoderHandler) WriteBMPImage;
entry->magick=(MagickHandler) IsBMP;
entry->description="Microsoft Windows bitmap image";
entry->module="BMP";
entry->adjoin=False;
entry->seekable_stream=True;
entry->coder_class=PrimaryCoderClass;
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("BMP2");
entry->encoder=(EncoderHandler) WriteBMPImage;
entry->magick=(MagickHandler) IsBMP;
entry->description="Microsoft Windows bitmap image v2";
entry->module="BMP";
entry->adjoin=False;
entry->coder_class=PrimaryCoderClass;
entry->seekable_stream=True;
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("BMP3");
entry->encoder=(EncoderHandler) WriteBMPImage;
entry->magick=(MagickHandler) IsBMP;
entry->description="Microsoft Windows bitmap image v3";
entry->module="BMP";
entry->adjoin=False;
entry->seekable_stream=True;
entry->coder_class=PrimaryCoderClass;
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r B M P I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method 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 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method 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:
%
% unsigned int WriteBMPImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Method WriteBMPImage return True if the image is written.
% False is returned is there is a memory shortage or if the image file
% fails to write.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o image: A pointer to an Image structure.
%
%
*/
static unsigned int WriteBMPImage(const ImageInfo *image_info,Image *image)
{
BMPInfo
bmp_info;
int
logging;
long
y;
register const PixelPacket
*p;
register long
i,
x;
register unsigned char
*q;
unsigned char
*bmp_data,
*pixels;
unsigned int
have_color_info,
status;
unsigned long
bytes_per_line,
scene,
type;
const unsigned char
*color_profile=0;
size_t
color_profile_length=0;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
logging=LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == False)
ThrowWriterException(FileOpenError,UnableToOpenFile,image);
type=4;
if (LocaleCompare(image_info->magick,"BMP2") == 0)
type=2;
else
if (LocaleCompare(image_info->magick,"BMP3") == 0)
type=3;
scene=0;
/*
Retrieve color profile from Image (if any)
*/
color_profile=GetImageProfile(image,"ICM",&color_profile_length);
do
{
/*
Initialize BMP raster file header.
*/
(void) TransformColorspace(image,RGBColorspace);
(void) memset(&bmp_info,0,sizeof(BMPInfo));
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 != DirectClass) && (image->colors > 256))
(void) SetImageType(image,TrueColorType);
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;
bmp_info.number_colors=1 << bmp_info.bits_per_pixel;
if (image->matte)
(void) SetImageType(image,TrueColorMatteType);
else
if (bmp_info.number_colors < image->colors)
(void) SetImageType(image,TrueColorType);
else
{
bmp_info.file_size+=3*(1 << bmp_info.bits_per_pixel);
bmp_info.offset_bits+=3*(1 << bmp_info.bits_per_pixel);
if (type > 2)
{
bmp_info.file_size+=(1 << bmp_info.bits_per_pixel);
bmp_info.offset_bits+=(1 << bmp_info.bits_per_pixel);
}
}
}
if (image->storage_class == DirectClass)
{
/*
Full color BMP raster.
*/
bmp_info.number_colors=0;
bmp_info.bits_per_pixel=((type > 3) && image->matte) ? 32 : 24;
bmp_info.compression=
(type > 3) && image->matte ? BI_BITFIELDS : BI_RGB;
}
bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
bmp_info.ba_offset=0;
have_color_info=(int) ((image->rendering_intent != UndefinedIntent) ||
(color_profile_length != 0) || (image->gamma != 0.0));
if (type == 2)
bmp_info.size=12;
else
if ((type == 3) || (!image->matte && !have_color_info))
{
type=3;
bmp_info.size=40;
}
else
{
int
extra_size;
bmp_info.size=108;
extra_size=68;
if ((image->rendering_intent != UndefinedIntent) ||
(color_profile_length != 0))
{
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;
if (image->units == 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);
}
if (image->units == PixelsPerCentimeterResolution)
{
bmp_info.x_pixels=(unsigned long) (100.0*image->x_resolution);
bmp_info.y_pixels=(unsigned long) (100.0*image->y_resolution);
}
bmp_info.colors_important=bmp_info.number_colors;
/*
Convert MIFF to BMP raster pixels.
*/
pixels=MagickAllocateMemory(unsigned char *,bmp_info.image_size);
if (pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed,image);
switch (bmp_info.bits_per_pixel)
{
case 1:
{
ExportPixelAreaOptions
export_options;
/*
Convert PseudoClass image to a BMP monochrome image.
*/
ExportPixelAreaOptionsInit(&export_options);
export_options.pad_bytes=(bytes_per_line - ((image->columns+7)/8));
export_options.pad_value=0x00;
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;
if (ExportImagePixelArea(image,IndexQuantum,1,q,&export_options,0)
== MagickFail)
{
break;
}
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
break;
}
break;
}
case 4:
{
ExportPixelAreaOptions
export_options;
/*
Convert PseudoClass image to a BMP monochrome image.
*/
ExportPixelAreaOptionsInit(&export_options);
export_options.pad_bytes=(bytes_per_line - ((image->columns+1)/2));
export_options.pad_value=0x00;
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;
if (ExportImagePixelArea(image,IndexQuantum,4,q,&export_options,0)
== MagickFail)
{
break;
}
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
break;
}
break;
}
case 8:
{
ExportPixelAreaOptions
export_options;
/*
Convert PseudoClass packet to BMP pixel.
*/
ExportPixelAreaOptionsInit(&export_options);
export_options.pad_bytes=(bytes_per_line - image->columns);
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;
if (ExportImagePixelArea(image,IndexQuantum,8,q,&export_options,0)
== MagickFail)
{
break;
}
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
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)
{
/* initialize padding bytes */
for (x=3*image->columns; x < (long) bytes_per_line; x++)
*q++=0x00;
}
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
break;
}
break;
}
}
if ((type > 2) && (bmp_info.bits_per_pixel == 8))
if (image_info->compression != NoCompression)
{
size_t
length;
/*
Convert run-length encoded raster pixels.
*/
length=2*(bytes_per_line+2)*(image->rows+2)+2;
bmp_data=MagickAllocateMemory(unsigned char *,length);
if (bmp_data == (unsigned char *) NULL)
{
MagickFreeMemory(pixels);
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed,
image)
}
bmp_info.file_size-=bmp_info.image_size;
bmp_info.image_size=EncodeImage(image,bytes_per_line,pixels,
bmp_data);
bmp_info.file_size+=bmp_info.image_size;
MagickFreeMemory(pixels);
pixels=bmp_data;
bmp_info.compression=BI_RLE8;
}
/*
Write BMP for Windows, all versions, 14-byte header.
*/
if (logging)
{
(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=%u",image->depth);
if (image->matte)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Matte=True");
else
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Matte=False");
(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,"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,bmp_info.width);
(void) WriteBlobLSBShort(image,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,bmp_info.width);
(void) WriteBlobLSBLong(image,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 || have_color_info))
{
/*
Write the rest of the 108-byte BMP Version 4 header.
*/
(void) WriteBlobLSBLong(image,0x00ff0000L); /* Red mask */
(void) WriteBlobLSBLong(image,0x0000ff00L); /* Green mask */
(void) WriteBlobLSBLong(image,0x000000ffL); /* Blue mask */
(void) WriteBlobLSBLong(image,0xff000000UL); /* Alpha mask */
(void) WriteBlobLSBLong(image,0x00000001L); /* CSType==Calib. RGB */
(void) WriteBlobLSBLong(image,
(long) image->chromaticity.red_primary.x*0x3ffffff);
(void) WriteBlobLSBLong(image,
(long) image->chromaticity.red_primary.y*0x3ffffff);
(void) WriteBlobLSBLong(image,
(long) (1.000f-(image->chromaticity.red_primary.x
+image->chromaticity.red_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,
(long) image->chromaticity.green_primary.x*0x3ffffff);
(void) WriteBlobLSBLong(image,
(long) image->chromaticity.green_primary.y*0x3ffffff);
(void) WriteBlobLSBLong(image,
(long) (1.000f-(image->chromaticity.green_primary.x
+image->chromaticity.green_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,
(long) image->chromaticity.blue_primary.x*0x3ffffff);
(void) WriteBlobLSBLong(image,
(long) image->chromaticity.blue_primary.y*0x3ffffff);
(void) WriteBlobLSBLong(image,
(long) (1.000f-(image->chromaticity.blue_primary.x
+image->chromaticity.blue_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,(long) bmp_info.gamma_scale.x*0xffff);
(void) WriteBlobLSBLong(image,(long) bmp_info.gamma_scale.y*0xffff);
(void) WriteBlobLSBLong(image,(long) bmp_info.gamma_scale.z*0xffff);
if ((image->rendering_intent != UndefinedIntent) ||
(color_profile_length != 0))
{
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,intent);
(void) WriteBlobLSBLong(image,0x0); /* dummy profile data */
(void) WriteBlobLSBLong(image,0x0); /* dummy profile length */
(void) WriteBlobLSBLong(image,0x0); /* reserved */
}
}
if (image->storage_class == PseudoClass)
{
unsigned char
*bmp_colormap;
/*
Dump colormap to file.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Colormap: %u entries",image->colors);
bmp_colormap=MagickAllocateMemory(unsigned char *,
(size_t) (4*(1L << bmp_info.bits_per_pixel)));
if (bmp_colormap == (unsigned char *) NULL)
{
MagickFreeMemory(pixels);
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed,
image);
}
q=bmp_colormap;
for (i=0; i < (long) Min(image->colors,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++=(Quantum) 0x0;
}
for ( ; i < (1L << bmp_info.bits_per_pixel); i++)
{
*q++=(Quantum) 0x0;
*q++=(Quantum) 0x0;
*q++=(Quantum) 0x0;
if (type > 2)
*q++=(Quantum) 0x0;
}
if (type <= 2)
(void) WriteBlob(image,3*(1L << bmp_info.bits_per_pixel),
(char *) bmp_colormap);
else
(void) WriteBlob(image,4*(1L << bmp_info.bits_per_pixel),
(char *) bmp_colormap);
MagickFreeMemory(bmp_colormap);
}
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Pixels: %lu bytes",bmp_info.image_size);
(void) WriteBlob(image,bmp_info.image_size,(char *) pixels);
MagickFreeMemory(pixels);
if (image->next == (Image *) NULL)
break;
image=SyncNextImageInList(image);
status=MagickMonitorFormatted(scene++,GetImageListLength(image),
&image->exception,SaveImagesText,
image->filename);
if (status == False)
break;
} while (image_info->adjoin);
if (image_info->adjoin)
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),"return");
return(True);
}