/*
% Copyright (C) 2003-2025 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/enum_strings.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
#ifndef BI_ALPHABITFIELDS
#define BI_ALPHABITFIELDS 6
#endif
#if !defined(MSWINDOWS) || defined(__MINGW32__)
#undef BI_RGB
#define BI_RGB 0
#undef BI_RLE8
#define BI_RLE8 1
#undef BI_RLE4
#define BI_RLE4 2
#undef BI_BITFIELDS
#define BI_BITFIELDS 3
#undef LCS_CALIBRATED_RGB
#define LCS_CALIBRATED_RGB 0
#undef LCS_sRGB
#define LCS_sRGB 1
#undef LCS_WINDOWS_COLOR_SPACE
#define LCS_WINDOWS_COLOR_SPACE 2
#undef PROFILE_LINKED
#define PROFILE_LINKED 3
#undef PROFILE_EMBEDDED
#define PROFILE_EMBEDDED 4
#undef LCS_GM_BUSINESS
#define LCS_GM_BUSINESS 1 /* Saturation */
#undef LCS_GM_GRAPHICS
#define LCS_GM_GRAPHICS 2 /* Relative */
#undef LCS_GM_IMAGES
#define LCS_GM_IMAGES 4 /* Perceptual */
#undef LCS_GM_ABS_COLORIMETRIC
#define LCS_GM_ABS_COLORIMETRIC 8 /* Absolute */
#endif /* !defined(MSWINDOWS) || defined(__MINGW32__) */
#if (QuantumDepth == 8)
#define MS_VAL16_TO_QUANTUM(_value) ((_value>=8192)?255:(_value>>5))
#elif (QuantumDepth == 16)
#define MS_VAL16_TO_QUANTUM(_value) ((_value>=8192)?65535:(_value*8))
#elif (QuantumDepth == 32)
#define MS_VAL16_TO_QUANTUM(_value) ((_value>=8192)?4294443007:(_value*524288))
#else
# error Unsupported quantum depth.
#endif
#ifdef WORDS_BIGENDIAN
#define LD_UINT16_LSB(_pixel, _ptr) _pixel=(magick_uint16_t)*_ptr++; _pixel|=(magick_uint16_t)*_ptr++ << 8
#else
#define LD_UINT16_LSB(_pixel, _ptr) _pixel=*(magick_uint16_t*)_ptr; _ptr+=2
#endif
/*
Typedef declarations.
*/
typedef struct _BMPInfo
{
size_t
file_size, /* 0 or size of file in bytes */
image_size; /* bytes_per_line*image->rows or uint32_t from file */
magick_uint32_t
ba_offset,
offset_bits,/* Starting position of image data in bytes */
size; /* Header size 12 = v2, 12-64 OS/2 v2, 40 = v3, 108 = v4, 124 = v5 */
magick_int32_t
width, /* BMP width */
height; /* BMP height (negative means bottom-up) */
magick_uint16_t
planes,
bits_per_pixel;
magick_uint32_t
compression,
x_pixels,
y_pixels,
number_colors,
colors_important;
magick_uint32_t
red_mask,
green_mask,
blue_mask,
alpha_mask;
magick_int32_t
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:
%
% MagickPassFail DecodeImage(Image *image,const unsigned long compression,
% unsigned char *pixels)
%
% A description of each parameter follows:
%
% o status: Method DecodeImage returns MagickPass if all the pixels are
% uncompressed without error, otherwise MagickFail.
%
% 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.
%
% o pixels_size: The size of the allocated buffer array.
%
*/
static MagickPassFail DecodeImage(Image *image,const unsigned long compression,
unsigned char *pixels, const size_t pixels_size)
{
unsigned long
x,
y;
unsigned int
i;
int
byte,
count;
register unsigned char
*q;
unsigned char
*end;
assert(image != (Image *) NULL);
assert(pixels != (unsigned char *) NULL);
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Decoding RLE compressed pixels to"
" %" MAGICK_SIZE_T_F "u bytes",
(MAGICK_SIZE_T) image->rows*(size_t)image->columns);
(void) memset(pixels,0,pixels_size);
byte=0;
x=0;
q=pixels;
end=pixels + pixels_size;
/*
Decompress sufficient data to support the number of pixels (or
rows) in the image and then return.
Do not wait to read the final EOL and EOI markers (if not yet
encountered) since we always read this marker just before we
return.
*/
for (y=0; y < image->rows; )
{
if (q < pixels || q >= end)
{
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Decode buffer full (y=%lu, "
"pixels_size=%" MAGICK_SIZE_T_F "u, "
"pixels=%p, q=%p, end=%p)",
y, (MAGICK_SIZE_T) pixels_size,
pixels, q, end);
break;
}
count=ReadBlobByte(image);
if (count == EOF)
return MagickFail;
if (count > 0)
{
count=Min(count, end - q);
/*
Encoded mode.
*/
byte=ReadBlobByte(image);
if (byte == EOF)
return MagickFail;
if (compression == BI_RLE8)
{
for ( i=count; i != 0; --i )
{
*q++=(unsigned char) byte;
}
}
else
{
for ( i=0; i < (unsigned int) count; i++ )
{
*q++=(unsigned char)
((i & 0x01) ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
}
}
x+=count;
}
else
{
/*
Escape mode.
*/
count=ReadBlobByte(image);
if (count == EOF)
return MagickFail;
if (count == 0x01)
{
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" RLE Escape code encountered");
goto rle_decode_done;
}
switch (count)
{
case 0x00:
{
/*
End of line.
*/
x=0;
y++;
q=pixels+y*(size_t) image->columns;
break;
}
case 0x02:
{
/*
Delta mode.
*/
byte=ReadBlobByte(image);
if (byte == EOF)
return MagickFail;
x+=byte;
byte=ReadBlobByte(image);
if (byte == EOF)
return MagickFail;
y+=byte;
q=pixels+y*(size_t) image->columns+x;
break;
}
default:
{
/*
Absolute mode.
*/
count=Min(count, end - q);
if (count < 0)
return MagickFail;
if (compression == BI_RLE8)
for (i=count; i != 0; --i)
{
byte=ReadBlobByte(image);
if (byte == EOF)
return MagickFail;
*q++=byte;
}
else
for (i=0; i < (unsigned int) count; i++)
{
if ((i & 0x01) == 0)
{
byte=ReadBlobByte(image);
if (byte == EOF)
return MagickFail;
}
*q++=(unsigned char)
((i & 0x01) ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
}
x+=count;
/*
Read pad byte.
*/
if (compression == BI_RLE8)
{
if (count & 0x01)
if (ReadBlobByte(image) == EOF)
return MagickFail;
}
else
if (((count & 0x03) == 1) || ((count & 0x03) == 2))
if (ReadBlobByte(image) == EOF)
return MagickFail;
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);
rle_decode_done:
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Decoded %" MAGICK_SIZE_T_F "u bytes",
(MAGICK_SIZE_T) (q-pixels));
if ((MAGICK_SIZE_T) (q-pixels) < pixels_size)
{
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" RLE decoded output is truncated");
return MagickFail;
}
return(MagickPass);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 size_t bytes_per_line,
const unsigned char *pixels,unsigned char *compressed_pixels)
{
unsigned long
y;
register const unsigned char
*p;
register unsigned 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 < image->rows; y++)
{
for (x=0; x < bytes_per_line; x+=i)
{
/*
Determine runlength.
*/
for (i=1; (((size_t) x+i) < 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((size_t) (q-compressed_pixels));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s B M P %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method IsBMP returns MagickTrue 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 MagickTrue 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(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);
}
static const char *DecodeBiCompression(const magick_uint32_t BiCompression, const magick_uint32_t BiSize)
{
switch(BiCompression)
{
case BI_RGB: return "BI_RGB"; /* uncompressed */
case BI_RLE4: return "BI_RLE4"; /* 4 bit RLE */
case BI_RLE8: return "BI_RLE8"; /* 8 bit RLE */
case BI_BITFIELDS:
if(BiSize==64) return "OS/2 Huffman 1D";
else return "BI_BITFIELDS";
case BI_JPEG: if(BiSize==64) return "OS/2 RLE-24";
else return "BI_JPEG";
case BI_PNG: return "BI_PNG";
case BI_ALPHABITFIELDS: return "BI_ALPHABITFIELDS";
}
return "UNKNOWN";
}
static Image *ExtractNestedBlob(Image ** image, const ImageInfo * image_info, int ImgType, ExceptionInfo * exception)
{
size_t
alloc_size;
unsigned char
*blob;
alloc_size = GetBlobSize(*image) - TellBlob(*image);
if (alloc_size > 0 &&
(blob = MagickAllocateResourceLimitedMemory(unsigned char *,alloc_size)) != NULL)
{
/* Copy JPG to memory blob */
if (ReadBlob(*image,alloc_size,blob) == alloc_size)
{
Image *image2;
ImageInfo *clone_info;
clone_info = CloneImageInfo(image_info);
(void) strlcpy(clone_info->magick, (ImgType==BI_JPEG)?"JPEG":"PNG", sizeof(clone_info->magick));
/* BlobToFile("/tmp/jnx-tile.jpg", blob,alloc_size,exception); */
/* (void) strlcpy(clone_info->filename, (ImgType==BI_JPEG)?"JPEG:":"PNG:", sizeof(clone_info->filename)); */
FormatString(clone_info->filename,"%sblob-%px", ImgType==BI_JPEG?"JPEG:":"PNG:", blob);
if ((image2 = BlobToImage(clone_info,blob,alloc_size,exception))
!= NULL)
{
if ((*image)->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Read embedded %s blob with dimensions %lux%lu",
image2->magick, image2->rows, image2->columns);
/*
Replace current image with new image while copying
base image attributes.
*/
(void) strlcpy(image2->filename, (*image)->filename,
sizeof(image2->filename));
(void) strlcpy(image2->magick_filename, (*image)->magick_filename,
sizeof(image2->magick_filename));
(void) strlcpy(image2->magick, (*image)->magick,
sizeof(image2->magick));
DestroyBlob(image2);
image2->blob = ReferenceBlob((*image)->blob);
if(((*image)->rows == 0) || ((*image)->columns == 0))
DeleteImageFromList(image);
AppendImageToList(image, image2);
}
DestroyImageInfo(clone_info);
clone_info = (ImageInfo *) NULL;
MagickFreeResourceLimitedMemory(blob);
}
else
{
MagickFreeResourceLimitedMemory(blob);
/* Failed to read enough data from input */
ThrowException(exception,CorruptImageError,UnexpectedEndOfFile, (*image)->filename);
}
}
else
{
/* Failed to allocate memory */
ThrowException(exception,ResourceLimitError,MemoryAllocationFailed,
(*image)->filename);
}
return(*image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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.
%
%
*/
#define ThrowBMPReaderException(code_,reason_,image_) \
do { \
MagickFreeResourceLimitedMemory(bmp_colormap); \
MagickFreeResourceLimitedMemory(pixels); \
ThrowReaderException(code_,reason_,image_); \
} while (0);
static Image *ReadBMPImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
BMPInfo
bmp_info;
Image
*image;
int
logging;
long
y;
magick_uint32_t
blue,
green,
opacity,
red;
ExtendedSignedIntegralType
start_position;
register long
x;
register PixelPacket
*q;
register long
i;
register unsigned char
*p;
size_t
bytes_per_line,
count,
length,
pixels_size;
unsigned char
*bmp_colormap,
magick[12],
*pixels;
unsigned int
status;
magick_off_t
file_remaining,
file_size,
offset;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
bmp_colormap=(unsigned char *) NULL;
pixels=(unsigned char *) NULL;
logging=LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
image=AllocateImage(image_info);
image->rows=0;
image->columns=0;
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
ThrowBMPReaderException(FileOpenError,UnableToOpenFile,image);
file_size=GetBlobSize(image);
/*
Determine if this is a BMP file.
*/
(void) memset(&bmp_info,0,sizeof(BMPInfo));
bmp_info.ba_offset=0;
start_position=0;
magick[0]=magick[1]=0;
count=ReadBlob(image,2,(char *) magick);
do
{
PixelPacket
quantum_bits,
shift;
magick_uint32_t
profile_data,
profile_size;
/*
Verify BMP identifier.
*/
/* if (bmp_info.ba_offset == 0) */ /* FIXME: Investigate. Start position needs to always advance! */
start_position=TellBlob(image)-2;
bmp_info.ba_offset=0;
/* "BA" is OS/2 bitmap array file */
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);
if ((count=ReadBlob(image,2,(char *) magick)) != 2)
break;
}
if (count != 2) /* Found "BA" header from above above */
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
if (logging )
(void) LogMagickEvent(CoderEvent,GetMagickModule()," Magick: %c%c",
magick[0],magick[1]);
bmp_info.file_size=ReadBlobLSBLong(image); /* File size in bytes */
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" File size: Claimed=%" MAGICK_SIZE_T_F "u, Actual=%"
MAGICK_OFF_F "d",
(MAGICK_SIZE_T) bmp_info.file_size, file_size);
(void) ReadBlobLSBLong(image); /* Reserved */
bmp_info.offset_bits=ReadBlobLSBLong(image); /* Bit map offset from start of file */
bmp_info.size=ReadBlobLSBLong(image); /* BMP Header size */
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Header size: %u\n"
" Offset bits: %u\n"
" Image data offset: %u",
bmp_info.size,
bmp_info.offset_bits,
bmp_info.ba_offset);
if (LocaleNCompare((char *) magick,"BM",2) != 0) /* "BM" is Windows or OS/2 file. */
{
if ((LocaleNCompare((char *) magick,"CI",2) != 0) || /* "CI" is OS/2 Color Icon */
(bmp_info.size!=12 && bmp_info.size!=40 && bmp_info.size!=64)) /* CI chunk must have biSize only 12 or 40 or 64 */
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
}
if ((bmp_info.file_size != 0) && ((magick_off_t) bmp_info.file_size > file_size))
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
if (bmp_info.offset_bits < bmp_info.size)
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
if(bmp_info.size == 12)
{
/*
Windows 2.X or OS/2 BMP image file.
*/
bmp_info.width=(magick_int16_t) ReadBlobLSBShort(image); /* Width */
bmp_info.height=(magick_int16_t) ReadBlobLSBShort(image); /* Height */
bmp_info.planes=ReadBlobLSBShort(image); /* # of color planes */
bmp_info.bits_per_pixel=ReadBlobLSBShort(image); /* Bits per pixel */
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: %dx%d",bmp_info.width,bmp_info.height);
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Planes: %u",bmp_info.planes);
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Bits per pixel: %u",bmp_info.bits_per_pixel);
}
}
else
{
/*
Microsoft Windows 3.X or later BMP image file.
*/
switch(bmp_info.size)
{
case 40: if(logging)
(void) LogMagickEvent(CoderEvent, GetMagickModule(), "Format: MS Windows bitmap 3.X");
break;
case 52: if(logging)
(void) LogMagickEvent(CoderEvent, GetMagickModule(), "Format: MS Windows bitmap 3.X V2");
break;
case 56:if(logging)
(void) LogMagickEvent(CoderEvent, GetMagickModule(), "Format: MS Windows bitmap 3.X V3");
break;
case 64: if(logging)
(void) LogMagickEvent(CoderEvent, GetMagickModule(), "Format: OS22XBITMAPHEADER");
break;
case 78:
case 108: if (logging)
(void) LogMagickEvent(CoderEvent, GetMagickModule(), "Format: MS Windows bitmap 3.X V4");
break;
case 124: if(logging)
(void) LogMagickEvent(CoderEvent, GetMagickModule(), "Format: MS Windows bitmap 3.X V5");
break;
default: if (bmp_info.size < 64)
ThrowBMPReaderException(CorruptImageError, NonOS2HeaderSizeError, image);
/* A value larger than 64 indicates a later version of the OS/2 BMP format.
.... as far as OS/2 development caesed we could consider to
close this Trojan's horse window in future. */
if(logging)
(void) LogMagickEvent(CoderEvent, GetMagickModule(), "Format: MS Windows bitmap 3.X ?");
break;
}
/*
BMP v3 defines width and height 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); /* Width */
bmp_info.height=(magick_int32_t) ReadBlobLSBLong(image); /* Height */
bmp_info.planes=ReadBlobLSBShort(image); /* # of color planes */
bmp_info.bits_per_pixel=ReadBlobLSBShort(image); /* Bits per pixel (1/4/8/16/24/32) */
bmp_info.compression=ReadBlobLSBLong(image); /* Compression method */
bmp_info.image_size=ReadBlobLSBLong(image); /* Bitmap size (bytes) */
bmp_info.x_pixels=ReadBlobLSBLong(image); /* Horizontal resolution (pixels/meter) */
bmp_info.y_pixels=ReadBlobLSBLong(image); /* Vertical resolution (pixels/meter) */
bmp_info.number_colors=ReadBlobLSBLong(image); /* Number of colors */
bmp_info.colors_important=ReadBlobLSBLong(image); /* Minimum important colors */
profile_data=0;
profile_size=0;
if (logging)
{
(void) LogMagickEvent(CoderEvent, GetMagickModule(),
" Geometry: %dx%d\n"
" Planes: %u\n"
" Bits per pixel: %u",
bmp_info.width, bmp_info.height,
bmp_info.planes,
bmp_info.bits_per_pixel);
if(bmp_info.compression <= BI_ALPHABITFIELDS)
(void) LogMagickEvent(CoderEvent, GetMagickModule(),
" Compression: %s", DecodeBiCompression(bmp_info.compression,bmp_info.size));
else
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression: UNKNOWN (%u)",bmp_info.compression);
(void) LogMagickEvent(CoderEvent, GetMagickModule(),
" Number of colors: %u\n"
" Important colors: %u",
bmp_info.number_colors, bmp_info.colors_important);
}
if(bmp_info.size==64)
{ /* OS22XBITMAPHEADER */
magick_uint16_t Units; /* Type of units used to measure resolution */
magick_uint16_t Reserved; /* Pad structure to 4-byte boundary */
magick_uint16_t Recording; /* Recording algorithm */
magick_uint16_t Rendering; /* Halftoning algorithm used */
magick_uint32_t Size1; /* Reserved for halftoning algorithm use */
magick_uint32_t Size2; /* Reserved for halftoning algorithm use */
magick_uint32_t ColorEncoding; /* Color model used in bitmap */
magick_uint32_t Identifier; /* Reserved for application use */
Units = ReadBlobLSBShort(image);
Reserved = ReadBlobLSBShort(image);
Recording = ReadBlobLSBShort(image);
Rendering = ReadBlobLSBShort(image);
Size1 = ReadBlobLSBLong(image);
Size2 = ReadBlobLSBLong(image);
ColorEncoding = ReadBlobLSBLong(image);
Identifier = ReadBlobLSBLong(image);
if(logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Units: %u\n"
" Reserved: %u\n"
" Recording: %u\n"
" Rendering: %u\n"
" Size1: %u\n"
" Size2: %u\n"
" ColorEncoding: %u\n"
" Identifier: %u",
Units, Reserved, Recording, Rendering,
Size1, Size2, ColorEncoding, Identifier);
/* OS/2 does not recognise JPEG nor PNG. */
if(bmp_info.compression==BI_JPEG || bmp_info.compression==BI_PNG)
ThrowBMPReaderException(CoderError,CompressionNotValid,image)
}
if (bmp_info.size>=52 && bmp_info.size!=64)
{
bmp_info.red_mask=ReadBlobLSBLong(image);
bmp_info.green_mask=ReadBlobLSBLong(image);
bmp_info.blue_mask=ReadBlobLSBLong(image);
if (bmp_info.size >= 56)
{
/*
Read color management information.
*/
bmp_info.alpha_mask=ReadBlobLSBLong(image);
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Alpha Mask: 0x%04x",
bmp_info.alpha_mask);
if (bmp_info.size > 120)
{
/*
https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapv4header
*/
magick_uint32_t
v4_red_primary_x, v4_red_primary_y, v4_red_primary_z,
v4_green_primary_x, v4_green_primary_y, v4_green_primary_z,
v4_blue_primary_x, v4_blue_primary_y, v4_blue_primary_z,
v4_gamma_x, v4_gamma_y, v4_gamma_z;
double
bmp_gamma,
sum;
bmp_info.colorspace=(magick_int32_t) ReadBlobLSBLong(image);
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"BMP Colorspace: 0x%04x",
bmp_info.colorspace);
v4_red_primary_x=ReadBlobLSBLong(image);
v4_red_primary_y=ReadBlobLSBLong(image);
v4_red_primary_z=ReadBlobLSBLong(image);
v4_green_primary_x=ReadBlobLSBLong(image);
v4_green_primary_y=ReadBlobLSBLong(image);
v4_green_primary_z=ReadBlobLSBLong(image);
v4_blue_primary_x=ReadBlobLSBLong(image);
v4_blue_primary_y=ReadBlobLSBLong(image);
v4_blue_primary_z=ReadBlobLSBLong(image);
v4_gamma_x = ReadBlobLSBLong(image);
v4_gamma_y = ReadBlobLSBLong(image);
v4_gamma_z = ReadBlobLSBLong(image);
if (LCS_CALIBRATED_RGB == bmp_info.colorspace)
{
/*
Decode 2^30 fixed point formatted CIE primaries.
https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-ciexyztriple
https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-ciexyz
*/
bmp_info.red_primary.x=(double) v4_red_primary_x/0x3ffffff;
bmp_info.red_primary.y=(double) v4_red_primary_y/0x3ffffff;
bmp_info.red_primary.z=(double) v4_red_primary_z/0x3ffffff;
bmp_info.green_primary.x=(double) v4_green_primary_x/0x3ffffff;
bmp_info.green_primary.y=(double) v4_green_primary_y/0x3ffffff;
bmp_info.green_primary.z=(double) v4_green_primary_z/0x3ffffff;
bmp_info.blue_primary.x=(double) v4_blue_primary_x/0x3ffffff;
bmp_info.blue_primary.y=(double) v4_blue_primary_y/0x3ffffff;
bmp_info.blue_primary.z=(double) v4_blue_primary_z/0x3ffffff;
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"BMP Primaries: red(%g,%g,%g),"
" green(%g,%g,%g),"
" blue(%g,%g,%g)",
bmp_info.red_primary.x,
bmp_info.red_primary.y,
bmp_info.red_primary.z,
bmp_info.green_primary.x,
bmp_info.green_primary.y,
bmp_info.green_primary.z,
bmp_info.blue_primary.x,
bmp_info.blue_primary.y,
bmp_info.blue_primary.z);
sum=bmp_info.red_primary.x+bmp_info.red_primary.y+bmp_info.red_primary.z;
sum=Max(MagickEpsilon,sum);
bmp_info.red_primary.x/=sum;
bmp_info.red_primary.y/=sum;
image->chromaticity.red_primary.x=bmp_info.red_primary.x;
image->chromaticity.red_primary.y=bmp_info.red_primary.y;
sum=bmp_info.green_primary.x+bmp_info.green_primary.y+bmp_info.green_primary.z;
sum=Max(MagickEpsilon,sum);
bmp_info.green_primary.x/=sum;
bmp_info.green_primary.y/=sum;
image->chromaticity.green_primary.x=bmp_info.green_primary.x;
image->chromaticity.green_primary.y=bmp_info.green_primary.y;
sum=bmp_info.blue_primary.x+bmp_info.blue_primary.y+bmp_info.blue_primary.z;
sum=Max(MagickEpsilon,sum);
bmp_info.blue_primary.x/=sum;
bmp_info.blue_primary.y/=sum;
image->chromaticity.blue_primary.x=bmp_info.blue_primary.x;
image->chromaticity.blue_primary.y=bmp_info.blue_primary.y;
/*
Decode 16^16 fixed point formatted gamma_scales.
Gamma encoded in unsigned fixed 16.16 format. The
upper 16 bits are the unsigned integer value. The
lower 16 bits are the fractional part.
*/
bmp_info.gamma_scale.x=v4_gamma_x/0xffff;
bmp_info.gamma_scale.y=v4_gamma_y/0xffff;
bmp_info.gamma_scale.z=v4_gamma_z/0xffff;
/*
Compute a single averaged gamma from the BMP 3-channel gamma.
*/
bmp_gamma = (bmp_info.gamma_scale.x+bmp_info.gamma_scale.y+
bmp_info.gamma_scale.z)/3.0;
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"BMP Gamma: %g", bmp_gamma);
/* This range is based on what libpng is willing to accept */
if (bmp_gamma > 0.00016 && bmp_gamma < 6250.0)
{
image->gamma=bmp_gamma;
}
else
{
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Ignoring illegal BMP gamma value %g "
"(gamma scale xyz %g,%g,%g)",
bmp_gamma, bmp_info.gamma_scale.x,
bmp_info.gamma_scale.y, bmp_info.gamma_scale.z);
}
}
}
}
}
if (bmp_info.size > 108)
{
/*
https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapv5header
https://www.loc.gov/preservation/digital/formats/fdd/fdd000189.shtml
*/
magick_uint32_t
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) LogMagickEvent(CoderEvent,GetMagickModule(),
" Profile: size %u data %u",
profile_size,profile_data);
(void) ReadBlobLSBLong(image); /* Reserved byte */
}
}
if (EOFBlob(image))
ThrowBMPReaderException(CorruptImageError,UnexpectedEndOfFile,image);
/*
It seems that some BMPs claim a file size two bytes larger than
they actually are so allow some slop before warning about file
size.
*/
if ((magick_off_t) bmp_info.file_size > file_size+2)
{
ThrowException(exception,CorruptImageWarning,
LengthAndFilesizeDoNotMatch,image->filename);
}
if (logging && (magick_off_t) bmp_info.file_size < file_size)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Discarding all data beyond bmp_info.file_size");
if (bmp_info.width <= 0)
ThrowBMPReaderException(CorruptImageError,NegativeOrZeroImageSize,image);
if ((bmp_info.height) == 0 || (bmp_info.height < -2147483647))
ThrowBMPReaderException(CorruptImageError,NegativeOrZeroImageSize,image);
if ((bmp_info.height < 0) && (bmp_info.compression !=0))
ThrowBMPReaderException(CorruptImageError,CompressionNotValid,image);
switch ((unsigned int) bmp_info.compression)
{
case BI_BITFIELDS:
if(bmp_info.size==40)
{
if(bmp_info.ba_offset==0) bmp_info.ba_offset=52;
if(bmp_info.ba_offset<52) /* check for gap size >=12*/
ThrowBMPReaderException(CorruptImageError,CorruptImage,image);
bmp_info.red_mask=ReadBlobLSBLong(image);
bmp_info.green_mask=ReadBlobLSBLong(image);
bmp_info.blue_mask=ReadBlobLSBLong(image);
goto CheckBitSize;
}
goto CheckAlphaBitSize;
case BI_ALPHABITFIELDS:
if(bmp_info.size==40)
{
if(bmp_info.ba_offset==0) bmp_info.ba_offset=56;
if(bmp_info.ba_offset<56) /* check for gap size >=16*/
ThrowBMPReaderException(CorruptImageError,CorruptImage,image);
bmp_info.red_mask=ReadBlobLSBLong(image);
bmp_info.green_mask=ReadBlobLSBLong(image);
bmp_info.blue_mask=ReadBlobLSBLong(image);
bmp_info.alpha_mask=ReadBlobLSBLong(image);
}
CheckAlphaBitSize:
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Alpha Mask: 0x%04x",
bmp_info.alpha_mask);
CheckBitSize:
if (image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Red Mask: 0x%04x\n"
"Green Mask: 0x%04x\n"
"Blue Mask: 0x%04x",
bmp_info.red_mask, bmp_info.green_mask, bmp_info.blue_mask);
if(!(bmp_info.bits_per_pixel==16 || bmp_info.bits_per_pixel==32))
ThrowBMPReaderException(CorruptImageError,CorruptImage,image);
break;
case BI_RGB:
case BI_RLE8:
case BI_RLE4:
break;
case BI_JPEG:
offset = start_position + 14 + bmp_info.size;
if(logging)
(void)LogMagickEvent(CoderEvent,GetMagickModule(),
"Seek offset %" MAGICK_OFF_F "d",
(magick_off_t) offset);
if((offset < start_position) ||
(SeekBlob(image,offset,SEEK_SET) != (magick_off_t) offset))
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
{
MonitorHandler previous_handler;
previous_handler = SetMonitorHandler(0);
image = ExtractNestedBlob(&image, image_info, bmp_info.compression, exception);
(void) SetMonitorHandler(previous_handler);
if (exception->severity >= ErrorException)
ThrowBMPReaderException(CoderError,JPEGCompressionNotSupported,image)
}
goto ExitLoop; /* I need to break a loop. Other BMPs in a chain are ignored. */
case BI_PNG:
offset = start_position + 14 + bmp_info.size;
if(logging)
(void)LogMagickEvent(CoderEvent,GetMagickModule(),
"Seek offset %" MAGICK_OFF_F "d",
(magick_off_t) offset);
if((offset < start_position) ||
(SeekBlob(image,offset,SEEK_SET) != (magick_off_t) offset))
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
{
MonitorHandler previous_handler;
previous_handler = SetMonitorHandler(0);
image = ExtractNestedBlob(&image, image_info, bmp_info.compression, exception);
(void) SetMonitorHandler(previous_handler);
if (exception->severity >= ErrorException)
ThrowBMPReaderException(CoderError,PNGCompressionNotSupported,image)
}
goto ExitLoop; /* I need to break a loop. Other BMPs in a chain are ignored. */
default:
ThrowBMPReaderException(CorruptImageError,UnrecognizedImageCompression,image)
}
if (bmp_info.planes != 1)
ThrowBMPReaderException(CorruptImageError,StaticPlanesValueNotEqualToOne,
image);
if ((bmp_info.bits_per_pixel != 1) && (bmp_info.bits_per_pixel != 2) && (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) &&
(bmp_info.bits_per_pixel != 48) && (bmp_info.bits_per_pixel != 64))
ThrowBMPReaderException(CorruptImageError,UnrecognizedBitsPerPixel,image);
if (bmp_info.bits_per_pixel < 16)
{
if (bmp_info.number_colors > (1UL << bmp_info.bits_per_pixel))
ThrowBMPReaderException(CorruptImageError,UnrecognizedNumberOfColors,image);
}
if ((bmp_info.compression == 1) && (bmp_info.bits_per_pixel != 8))
ThrowBMPReaderException(CorruptImageError,UnrecognizedBitsPerPixel,image);
if ((bmp_info.compression == 2) && (bmp_info.bits_per_pixel != 4))
ThrowBMPReaderException(CorruptImageError,UnrecognizedBitsPerPixel,image);
if ((bmp_info.compression == 3) && (bmp_info.bits_per_pixel < 16))
ThrowBMPReaderException(CorruptImageError,UnrecognizedBitsPerPixel,image);
image->columns=bmp_info.width;
image->rows=AbsoluteValue(bmp_info.height);
#if (QuantumDepth == 8)
image->depth=8;
#else
if(bmp_info.bits_per_pixel==48 || bmp_info.bits_per_pixel==64)
image->depth=16;
else
image->depth=8;
#endif
/*
Image has alpha channel if alpha mask is specified, or is
uncompressed and 32-bits per pixel
*/
image->matte=((bmp_info.alpha_mask != 0)
|| ((bmp_info.compression == BI_RGB)
&& (bmp_info.bits_per_pixel == 32)));
if (bmp_info.bits_per_pixel < 16)
{
if (bmp_info.number_colors == 0)
image->colors=1L << bmp_info.bits_per_pixel;
else
image->colors=bmp_info.number_colors;
image->storage_class=PseudoClass;
}
if (image->storage_class == PseudoClass)
{
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))
ThrowBMPReaderException(ResourceLimitError,MemoryAllocationFailed,
image);
bmp_colormap=MagickAllocateResourceLimitedArray(unsigned char *,4,image->colors);
if (bmp_colormap == (unsigned char *) NULL)
ThrowBMPReaderException(ResourceLimitError,MemoryAllocationFailed,
image);
if ((bmp_info.size == 12) || (bmp_info.size == 64))
packet_size=3;
else
packet_size=4;
offset=start_position+14+bmp_info.size;
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Seek offset %" MAGICK_OFF_F "d",
(magick_off_t) offset);
if ((offset < start_position) ||
(SeekBlob(image,offset,SEEK_SET) != (magick_off_t) offset))
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
if (ReadBlob(image,(size_t) packet_size*image->colors,(char *) bmp_colormap)
!= (size_t) packet_size*image->colors)
ThrowBMPReaderException(CorruptImageError,UnexpectedEndOfFile,image);
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++;
}
MagickFreeResourceLimitedMemory(bmp_colormap);
}
if (image_info->ping && (image_info->subrange != 0))
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
if (CheckImagePixelLimits(image, exception) != MagickPass)
ThrowBMPReaderException(ResourceLimitError,ImagePixelLimitExceeded,image);
/*
Read image data.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"start_position %" MAGICK_OFF_F "d,"
" bmp_info.offset_bits %" MAGICK_OFF_F "d,"
" bmp_info.ba_offset %" MAGICK_OFF_F "d" ,
(magick_off_t) start_position,
(magick_off_t) bmp_info.offset_bits,
(magick_off_t) bmp_info.ba_offset);
offset=start_position+bmp_info.offset_bits;
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Seek offset %" MAGICK_OFF_F "d",
(magick_off_t) offset);
if ((offset < start_position) ||
(SeekBlob(image,offset,SEEK_SET) != (magick_off_t) offset))
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
if (bmp_info.compression == BI_RLE4)
bmp_info.bits_per_pixel<<=1;
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"image->columns: %lu, bmp_info.bits_per_pixel %u",
image->columns, bmp_info.bits_per_pixel);
/*
Below emulates:
bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
*/
bytes_per_line=MagickArraySize(image->columns,bmp_info.bits_per_pixel);
if ((bytes_per_line > 0) && (~((size_t) 0) - bytes_per_line) > 31)
bytes_per_line = MagickArraySize(4,(bytes_per_line+31)/32);
if (bytes_per_line == 0)
ThrowBMPReaderException(CoderError,ArithmeticOverflow,image);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Bytes per line: %" MAGICK_SIZE_T_F "u",
(MAGICK_SIZE_T) bytes_per_line);
length=MagickArraySize(bytes_per_line,image->rows);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Expected total raster length: %" MAGICK_SIZE_T_F "u",
(MAGICK_SIZE_T) length);
if (length == 0)
ThrowBMPReaderException(CoderError,ArithmeticOverflow,image);
/*
Check that file data is reasonable given claims by file header.
We do this before allocating raster memory to avoid DOS.
*/
if ((bmp_info.compression == BI_RGB) ||
(bmp_info.compression == BI_BITFIELDS) ||
(bmp_info.compression == BI_ALPHABITFIELDS))
{
/*
Not compressed.
*/
file_remaining=file_size-TellBlob(image);
if (file_remaining < (magick_off_t) length)
ThrowBMPReaderException(CorruptImageError,InsufficientImageDataInFile,
image);
}
else if ((bmp_info.compression == BI_RLE4) ||
(bmp_info.compression == BI_RLE8))
{
/* RLE Compressed. Assume a maximum compression ratio. */
file_remaining=file_size-TellBlob(image);
if ((file_remaining <= 0) || (((double) length/file_remaining) > 254.0))
ThrowBMPReaderException(CorruptImageError,InsufficientImageDataInFile,
image);
}
if ((image->columns+1UL) < image->columns)
ThrowBMPReaderException(CoderError,ArithmeticOverflow,image);
pixels_size=MagickArraySize(Max(bytes_per_line,(size_t) image->columns+1),
image->rows);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Pixels size %" MAGICK_SIZE_T_F "u",
(MAGICK_SIZE_T) pixels_size);
if (pixels_size == 0)
ThrowBMPReaderException(CoderError,ArithmeticOverflow,image);
pixels=MagickAllocateResourceLimitedMemory(unsigned char *, pixels_size);
if (pixels == (unsigned char *) NULL)
ThrowBMPReaderException(ResourceLimitError,MemoryAllocationFailed,image);
if ((bmp_info.compression == BI_RGB) ||
(bmp_info.compression == BI_BITFIELDS) ||
(bmp_info.compression == BI_ALPHABITFIELDS))
{
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Reading pixels (%" MAGICK_SIZE_T_F "u bytes)",
(MAGICK_SIZE_T) length);
if (ReadBlob(image,length,(char *) pixels) != (size_t) length)
ThrowBMPReaderException(CorruptImageError,UnexpectedEndOfFile,image);
}
else
{
/*
Convert run-length encoded raster pixels.
DecodeImage() normally decompresses to rows*columns bytes of data.
*/
status=DecodeImage(image,bmp_info.compression,pixels,
(size_t) image->rows*image->columns);
if (status == MagickFail)
ThrowBMPReaderException(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;
(void) memset(&quantum_bits,0,sizeof(PixelPacket));
(void) memset(&shift,0,sizeof(PixelPacket));
/*
Convert BMP raster image to pixel packets.
*/
#if 0
if (bmp_info.compression == BI_RGB)
{
bmp_info.alpha_mask=(image->matte ? 0xff000000U : 0U);
bmp_info.red_mask=0x00ff0000U;
bmp_info.green_mask=0x0000ff00U;
bmp_info.blue_mask=0x000000ffU;
if (bmp_info.bits_per_pixel == 16)
{
/* RGB555. JFO: Please consider whether this is correct ?? I guess RGB 565! */
bmp_info.red_mask=0x00007c00U;
bmp_info.green_mask=0x000003e0U;
bmp_info.blue_mask=0x0000001fU;
}
}
#endif
if ((bmp_info.bits_per_pixel == 16) || (bmp_info.bits_per_pixel == 32))
{
register magick_uint32_t
sample;
/* Use defaults for 40 bytes header and also a reminder of a culture of sloth. */
if(bmp_info.compression == BI_RGB ||
(bmp_info.red_mask==0 && bmp_info.green_mask==0 && bmp_info.blue_mask==0 && bmp_info.alpha_mask==0))
{
if (bmp_info.bits_per_pixel == 16)
{
if(bmp_info.compression==BI_ALPHABITFIELDS)
{ /* USE ARGB 1555 */
image->matte = MagickTrue;
bmp_info.alpha_mask=0x00008000U;
bmp_info.red_mask=0x00007c00U;
bmp_info.green_mask=0x000003e0U;
bmp_info.blue_mask=0x0000001fU;
}
else /* USE RGB 565 */
{
bmp_info.red_mask=0x0000F800U;
bmp_info.green_mask=0x000007e0U;
bmp_info.blue_mask=0x0000001fU;
}
}
if ( bmp_info.bits_per_pixel == 32)
{
if(bmp_info.compression==BI_RGB || bmp_info.compression==BI_ALPHABITFIELDS)
{
image->matte = MagickTrue;
bmp_info.alpha_mask=0xff000000U;
}
bmp_info.red_mask=0x00ff0000U;
bmp_info.green_mask=0x0000ff00U;
bmp_info.blue_mask=0x000000ffU;
}
}
/*
Get shift and quantum bits info from bitfield masks.
*/
if (bmp_info.red_mask != 0U)
while ((shift.red < 32U) && (((bmp_info.red_mask << shift.red) & 0x80000000U) == 0))
shift.red++;
if (bmp_info.green_mask != 0)
while ((shift.green < 32U) && (((bmp_info.green_mask << shift.green) & 0x80000000U) == 0))
shift.green++;
if (bmp_info.blue_mask != 0)
while ((shift.blue < 32U) && (((bmp_info.blue_mask << shift.blue) & 0x80000000U) == 0))
shift.blue++;
if (bmp_info.alpha_mask != 0)
while ((shift.opacity < 32U) && (((bmp_info.alpha_mask << shift.opacity) & 0x80000000U) == 0))
shift.opacity++;
sample=shift.red;
while ((sample < 32U) && (((bmp_info.red_mask << sample) & 0x80000000U) != 0))
sample++;
quantum_bits.red=(Quantum) (sample-shift.red);
sample=shift.green;
while ((sample < 32U) && (((bmp_info.green_mask << sample) & 0x80000000U) != 0))
sample++;
quantum_bits.green=(Quantum) (sample-shift.green);
sample=shift.blue;
while ((sample < 32U) && (((bmp_info.blue_mask << sample) & 0x80000000U) != 0))
sample++;
quantum_bits.blue=(Quantum) (sample-shift.blue);
sample=shift.opacity;
while ((sample < 32U) && (((bmp_info.alpha_mask << sample) & 0x80000000U) != 0))
sample++;
quantum_bits.opacity=(Quantum) (sample-shift.opacity);
}
switch (bmp_info.bits_per_pixel)
{
case 1:
case 2:
case 4:
{
/*
Convert PseudoColor scanline.
*/
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+((size_t)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((size_t)image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
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+((size_t)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((size_t)image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == MagickFalse)
break;
}
}
break;
}
case 16:
{
magick_uint32_t
pixel;
/*
Convert bitfield encoded 16-bit PseudoColor scanline.
*/
if (bmp_info.compression != BI_RGB &&
bmp_info.compression != BI_BITFIELDS &&
bmp_info.compression != BI_ALPHABITFIELDS)
ThrowBMPReaderException(CorruptImageError,UnrecognizedImageCompression,image)
bytes_per_line=2*((size_t)image->columns+image->columns%2);
image->storage_class=DirectClass;
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+((size_t)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++)
{
#ifdef WORDS_BIGENDIAN
pixel=(*p++);
pixel|=(*p++) << 8;
#else
pixel = *(magick_uint16_t*)p;
p += 2;
#endif
red=((pixel & bmp_info.red_mask) << shift.red) >> 16;
if (quantum_bits.red <= 8) /* TODO: this is ugly, but better than nothing. Should be reworked. */
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=MaxRGB-ScaleShortToQuantum(opacity);
}
q->red=ScaleShortToQuantum(red);
q->green=ScaleShortToQuantum(green);
q->blue=ScaleShortToQuantum(blue);
q->opacity=OpaqueOpacity;
q++;
}
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted((size_t)image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == MagickFalse)
break;
}
}
break;
}
case 24:
{
/*
Convert DirectColor scanline.
*/
bytes_per_line=4*(((size_t)image->columns*24+31)/32);
for (y=(long) image->rows-1; y >= 0; y--)
{
p=pixels+((size_t)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->opacity=OpaqueOpacity;
q++;
}
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted((size_t)image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == MagickFalse)
break;
}
}
break;
}
case 32:
{
/* char ZeroOpacity = 1; */
/*
Convert bitfield encoded DirectColor scanline.
*/
if(bmp_info.compression != BI_RGB &&
bmp_info.compression != BI_BITFIELDS &&
bmp_info.compression != BI_ALPHABITFIELDS)
ThrowBMPReaderException(CorruptImageError,UnrecognizedImageCompression,image)
bytes_per_line=4*((size_t) image->columns);
for (y=(long) image->rows-1; y >= 0; y--)
{
magick_uint32_t
pixel;
p=pixels+((size_t) 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++)
{
#ifdef WORDS_BIGENDIAN
pixel =((magick_uint32_t) *p++);
pixel|=((magick_uint32_t) *p++ << 8);
pixel|=((magick_uint32_t) *p++ << 16);
pixel|=((magick_uint32_t) *p++ << 24);
#else
pixel = *(magick_uint32_t*)p;
p += 4;
#endif
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(opacity!=0) ZeroOpacity=0; */
if (quantum_bits.opacity <= 8)
opacity|=(opacity >> 8);
q->opacity=MaxRGB-ScaleShortToQuantum(opacity);
}
else
{
q->opacity = OpaqueOpacity;
}
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((size_t)image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if (status == MagickFalse)
break;
}
}
/* if(ZeroOpacity) image->matte = MagickFalse; */
break;
}
case 48:
{
magick_uint16_t val_16;
/*
Convert DirectColor scanline.
*/
for(y=(long) image->rows-1; y >= 0; y--)
{
p = pixels+((size_t) 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++)
{
LD_UINT16_LSB(val_16,p);
q->blue = MS_VAL16_TO_QUANTUM(val_16);
LD_UINT16_LSB(val_16,p);
q->green = MS_VAL16_TO_QUANTUM(val_16);
LD_UINT16_LSB(val_16,p);
q->red = MS_VAL16_TO_QUANTUM(val_16);
q->opacity = OpaqueOpacity;
q++;
}
if(!SyncImagePixels(image))
break;
if(image->previous == (Image *) NULL)
if(QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted((size_t)image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if(status == MagickFalse)
break;
}
}
break;
}
case 64:
{
magick_uint16_t val_16;
/*
Convert DirectColor scanline.
*/
for(y=(long) image->rows-1; y >= 0; y--)
{
p = pixels+((size_t) 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++)
{
LD_UINT16_LSB(val_16,p);
q->blue = MS_VAL16_TO_QUANTUM(val_16);
LD_UINT16_LSB(val_16,p);
q->green = MS_VAL16_TO_QUANTUM(val_16);
LD_UINT16_LSB(val_16,p);
q->red = MS_VAL16_TO_QUANTUM(val_16);
/* FIXME: support alpha */
q->opacity = OpaqueOpacity;
p+=2;
q++;
}
if(!SyncImagePixels(image))
break;
if(image->previous == (Image *) NULL)
if(QuantumTick(y,image->rows))
{
status=MagickMonitorFormatted((size_t) image->rows-y-1,image->rows,
exception,LoadImageText,
image->filename,
image->columns,image->rows);
if(status == MagickFalse)
break;
}
}
break;
}
default:
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
}
MagickFreeResourceLimitedMemory(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);
}
DestroyBlob(flipped_image);
flipped_image->blob=ReferenceBlob(image->blob);
ReplaceImageInList(&image,flipped_image);
}
StopTimer(&image->timer);
/*
Proceed to next image.
*/
if (image_info->subrange != 0)
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
*magick='\0';
file_remaining=file_size-TellBlob(image);
if (file_remaining == 0)
break;
offset=bmp_info.ba_offset;
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Seek offset %" MAGICK_OFF_F "d",
(magick_off_t) offset);
if (offset > 0)
if ((offset < TellBlob(image)) ||
(SeekBlob(image,offset,SEEK_SET) != (magick_off_t) offset))
ThrowBMPReaderException(CorruptImageError,ImproperImageHeader,image);
if (ReadBlob(image,2,(char *) magick) != (size_t) 2)
break;
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 == MagickFalse)
break;
}
} while (IsBMP(magick,2));
ExitLoop:
{
Image *p;
long scene=0;
/*
Rewind list, removing any empty images while rewinding.
*/
p=image;
image=NULL;
while (p != (Image *)NULL)
{
Image *tmp=p;
if ((p->rows == 0) || (p->columns == 0)) {
p=p->previous;
DeleteImageFromList(&tmp);
} else {
image=p;
p=p->previous;
}
}
/*
Fix scene numbers
*/
for (p=image; p != (Image *) NULL; p=p->next)
p->scene=scene++;
}
/*
while (image->previous != (Image *) NULL)
image=image->previous;
*/
CloseBlob(image);
#if 0
if (logging)
{
const size_t list_length = GetImageListLength(image);
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"%lu image%s in list", list_length, list_length > 1 ? "s" : "");
}
#endif
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=MagickFalse;
entry->seekable_stream=MagickTrue;
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=MagickFalse;
entry->coder_class=PrimaryCoderClass;
entry->seekable_stream=MagickTrue;
(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=MagickFalse;
entry->seekable_stream=MagickTrue;
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");
}
typedef struct
{
const char FormatName[5];
const char FormatNameDDot[6];
const char Desc[24];
} TForeignFormatDesc;
static const TForeignFormatDesc StoreDescJPG = {"JPEG", "JPEG:", " Creating jpeg_image."};
static const TForeignFormatDesc StoreDescPNG = {"PNG", "PNG:", " Creating png_image."};
static int StoreAlienBlob(Image * image, const ImageInfo * image_info, const TForeignFormatDesc *pFormatDesc)
{
ImageInfo *jpeg_image_info;
Image *jpeg_image;
void *Data;
size_t DataSize = 0;
jpeg_image_info = (ImageInfo *)CloneImageInfo(image_info);
if(jpeg_image_info == (ImageInfo *) NULL)
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed, image);
if(image->logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(), "%s", pFormatDesc->Desc);
jpeg_image = CloneImage(image,0,0,MagickTrue,&image->exception);
(void)strlcpy(jpeg_image_info->magick, pFormatDesc->FormatName, MaxTextExtent);
(void)strlcpy(jpeg_image_info->filename,"JPEG:",MaxTextExtent);
(void)strlcpy(jpeg_image->magick, pFormatDesc->FormatName, MaxTextExtent);
(void)strlcpy(jpeg_image->filename, pFormatDesc->FormatNameDDot, MaxTextExtent);
Data = ImageToBlob(jpeg_image_info,jpeg_image,&DataSize,&image->exception);
if(Data!=NULL)
{
WriteBlob(image,DataSize,Data);
MagickFreeMemory(Data);
}
/* Destroy JPEG image and image_info */
DestroyImage(jpeg_image);
DestroyImageInfo(jpeg_image_info);
return 0;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 MagickTrue if the image is written.
% MagickFalse 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;
unsigned long
y;
register const PixelPacket
*p;
register unsigned long
i,
x;
register unsigned char
*q;
unsigned char
*bmp_data,
*pixels;
size_t
bytes_per_line,
image_size;
MagickBool
adjoin,
have_color_info;
MagickPassFail
status;
unsigned long
scene,
type;
/* const unsigned char */
/* *color_profile=0; */
size_t
color_profile_length=0;
size_t
image_list_length;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
image_list_length=GetImageListLength(image);
logging=LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"%" MAGICK_SIZE_T_F "u image frames in list",
(MAGICK_SIZE_T) image_list_length);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == MagickFail)
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;
adjoin=image_info->adjoin;
/*
Retrieve color profile from Image (if any)
FIXME: is color profile support writing not properly implemented?
*/
/* color_profile= */ (void) GetImageProfile(image,"ICM",&color_profile_length);
do
{
/*
Initialize BMP raster file header.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Original: Scene %lu, storage_class %s, colors %u",
scene,
ClassTypeToString(image->storage_class),
image->colors);
(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=(magick_uint32_t) bmp_info.file_size;
bmp_info.compression=BI_RGB;
if ((image->storage_class != DirectClass) && (image->colors > 256))
(void) SetImageType(image,TrueColorType);
if(type>2 && AccessDefinition(image_info,"bmp","allow-jpeg"))
{
image->compression = JPEGCompression;
bmp_info.number_colors = 0;
bmp_info.bits_per_pixel = 0;
bmp_info.compression = BI_JPEG;
}
else if(type>2 && AccessDefinition(image_info,"bmp","allow-png"))
{
image->compression = ZipCompression;
bmp_info.number_colors = 0;
bmp_info.bits_per_pixel = 0;
bmp_info.compression = BI_PNG;
}
else
{
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+=3U*(((size_t)1U) << bmp_info.bits_per_pixel);
bmp_info.offset_bits+=3U*(1U << bmp_info.bits_per_pixel);
if (type > 2)
{
bmp_info.file_size+=((size_t)1U << bmp_info.bits_per_pixel);
bmp_info.offset_bits+=(1U << bmp_info.bits_per_pixel);
}
}
}
/* Note: Image class could be changed in a code above. */
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;
}
}
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Final: Scene %lu, storage_class %s, colors %u",
scene,
ClassTypeToString(image->storage_class),
image->colors);
if(bmp_info.compression==BI_JPEG || bmp_info.compression==BI_PNG)
{
bytes_per_line = 0;
image_size = 0;
have_color_info = 0;
}
else
{
/*
Below emulates:
bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
*/
bytes_per_line=MagickArraySize(image->columns,bmp_info.bits_per_pixel);
if ((bytes_per_line > 0) && (~((size_t) 0) - bytes_per_line) > 31)
bytes_per_line = MagickArraySize(4,(bytes_per_line+31)/32);
if (bytes_per_line==0)
ThrowWriterException(CoderError,ArithmeticOverflow,image);
image_size=MagickArraySize(bytes_per_line,image->rows);
if ((image_size == 0) || ((image_size & 0xffffffff) != image_size))
ThrowWriterException(CoderError,ArithmeticOverflow,image);
have_color_info=(int) ((image->rendering_intent != UndefinedIntent) ||
(color_profile_length != 0) || (image->gamma != 0.0));
}
bmp_info.ba_offset=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;
}
/*
Verify and enforce that image dimensions do not exceed limit
imposed by file format.
*/
if (type == 2)
{
bmp_info.width=(magick_int16_t) image->columns;
bmp_info.height=(magick_int16_t) image->rows;
}
else
{
bmp_info.width=(magick_int32_t) image->columns;
bmp_info.height=(magick_int32_t) image->rows;
}
if (((unsigned long) bmp_info.width != image->columns) ||
((unsigned long) bmp_info.height != image->rows))
{
ThrowWriterException(CoderError,ImageColumnOrRowSizeIsNotSupported,image);
}
bmp_info.planes=1;
bmp_info.image_size=image_size;
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.
*/
if(bmp_info.compression==BI_JPEG || bmp_info.compression==BI_PNG)
pixels=NULL;
else
{
pixels=MagickAllocateResourceLimitedMemory(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.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Output %u-bit PseudoClass pixels",
bmp_info.bits_per_pixel);
ExportPixelAreaOptionsInit(&export_options);
export_options.pad_bytes=(unsigned long) (bytes_per_line - (((size_t) image->columns+7)/8));
export_options.pad_value=0x00;
for (y=0; y < image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
q=pixels+((size_t) 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.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Output %u-bit PseudoClass pixels",
bmp_info.bits_per_pixel);
ExportPixelAreaOptionsInit(&export_options);
export_options.pad_bytes=(unsigned long) (bytes_per_line - ((image->columns+1)/2));
export_options.pad_value=0x00;
for (y=0; y < image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
q=pixels+((size_t) 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.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Output %u-bit PseudoClass pixels",
bmp_info.bits_per_pixel);
ExportPixelAreaOptionsInit(&export_options);
export_options.pad_bytes=(unsigned long) (bytes_per_line - image->columns);
for (y=0; y < image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
q=pixels+((size_t) image->rows-y-1)*bytes_per_line;
if (ExportImagePixelArea(image,IndexQuantum,8,q,&export_options,0)
== MagickFail)
{
/* Please note that pixels array has uninitialised elements when this fails. */
if(logging)
(void)LogMagickEvent(CoderEvent,GetMagickModule(),
" ExportImagePixelArea failed at row %lu", y);
ThrowWriterException(CoderError,DataEncodingSchemeIsNotSupported,image);
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.
*/
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Output %u-bit DirectClass pixels",
bmp_info.bits_per_pixel);
for (y=0; y < image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
q=pixels+((size_t) image->rows-y-1)*bytes_per_line;
for (x=0; x < image->columns; x++)
{
*q++=ScaleQuantumToChar(p->blue);
*q++=ScaleQuantumToChar(p->green);
*q++=ScaleQuantumToChar(p->red);
if (bmp_info.bits_per_pixel == 32)
*q++=ScaleQuantumToChar(MaxRGB-p->opacity);
p++;
}
if (bmp_info.bits_per_pixel == 24)
{
/* initialize padding bytes */
for (x=3*image->columns; x < 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;
}
default:
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Unsupported bits-per-pixel %u!",
bmp_info.bits_per_pixel);
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)*((size_t)image->rows+2)+2;
bmp_data=MagickAllocateResourceLimitedMemory(unsigned char *,length);
if (bmp_data == (unsigned char *) NULL)
{
MagickFreeResourceLimitedMemory(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;
MagickFreeResourceLimitedMemory(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);
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" BMP file_size=%" MAGICK_SIZE_T_F "u bytes",
(MAGICK_SIZE_T) bmp_info.file_size);
if(bmp_info.compression <=BI_ALPHABITFIELDS)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression=%s", DecodeBiCompression(bmp_info.compression,40));
else
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Compression=UNKNOWN (%u)",bmp_info.compression);
if (bmp_info.number_colors == 0)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Number_colors=unspecified");
else
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Number_colors=%u",bmp_info.number_colors);
}
(void) WriteBlob(image,2,"BM");
(void) WriteBlobLSBLong(image,(magick_uint32_t) 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,(magick_uint32_t) 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,
(magick_uint32_t) (image->chromaticity.red_primary.x*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (image->chromaticity.red_primary.y*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (1.000f-(image->chromaticity.red_primary.x
+image->chromaticity.red_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (image->chromaticity.green_primary.x*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (image->chromaticity.green_primary.y*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (1.000f-(image->chromaticity.green_primary.x
+image->chromaticity.green_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (image->chromaticity.blue_primary.x*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (image->chromaticity.blue_primary.y*0x3ffffff));
(void) WriteBlobLSBLong(image,
(magick_uint32_t) (1.000f-(image->chromaticity.blue_primary.x
+image->chromaticity.blue_primary.y)*0x3ffffff));
(void) WriteBlobLSBLong(image,(magick_uint32_t) (bmp_info.gamma_scale.x*0xffff));
(void) WriteBlobLSBLong(image,(magick_uint32_t) (bmp_info.gamma_scale.y*0xffff));
(void) WriteBlobLSBLong(image,(magick_uint32_t) (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(pixels==NULL)
{
StoreAlienBlob(image,image_info, (bmp_info.compression==BI_JPEG)? &StoreDescJPG : &StoreDescPNG);
}
else
{
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=MagickAllocateResourceLimitedArray(unsigned char *,4,
((size_t)1L << bmp_info.bits_per_pixel));
if (bmp_colormap == (unsigned char *) NULL)
{
MagickFreeResourceLimitedMemory(pixels);
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed, image);
}
q=bmp_colormap;
for (i=0; i < 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 < (1UL << 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*((size_t)1UL << bmp_info.bits_per_pixel),
(char *) bmp_colormap);
else
(void) WriteBlob(image,4*((size_t)1UL << bmp_info.bits_per_pixel),
(char *) bmp_colormap);
MagickFreeResourceLimitedMemory(bmp_colormap);
}
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
" Pixels: %" MAGICK_SIZE_T_F "u bytes",
(MAGICK_SIZE_T) bmp_info.image_size);
(void) WriteBlob(image,bmp_info.image_size,(char *) pixels);
MagickFreeResourceLimitedMemory(pixels);
}
if (image->next == (Image *) NULL)
{
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"No more image frames in list (scene=%lu)",
scene);
break;
}
image=SyncNextImageInList(image);
status&=MagickMonitorFormatted(scene++,image_list_length,
&image->exception,SaveImagesText,
image->filename);
if (status != MagickPass)
break;
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"At end of image adjoin loop (adjoin=%u, scene=%lu)",
image_info->adjoin, scene);
} while (adjoin);
if (adjoin)
while (image->previous != (Image *) NULL)
image=image->previous;
status &= CloseBlob(image);
if (logging)
(void) LogMagickEvent(CoderEvent,GetMagickModule(),"return");
return(status);
}
