forked from openkylin/imagemagick
1431 lines
46 KiB
C
1431 lines
46 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% DDDD IIIII BBBB %
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% D D I B B %
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% D D I BBBB %
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% D D I B B %
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% DDDD IIIII BBBB %
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% %
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% %
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% Read/Write Windows DIB Image Format %
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% %
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% Software Design %
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% Cristy %
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% July 1992 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "magick/studio.h"
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#include "magick/attribute.h"
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#include "magick/blob.h"
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#include "magick/blob-private.h"
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#include "magick/cache.h"
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#include "magick/color.h"
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#include "magick/color-private.h"
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#include "magick/colormap.h"
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#include "magick/colormap-private.h"
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#include "magick/colorspace.h"
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#include "magick/colorspace-private.h"
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#include "magick/draw.h"
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#include "magick/exception.h"
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#include "magick/exception-private.h"
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#include "magick/geometry.h"
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#include "magick/image.h"
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#include "magick/image-private.h"
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#include "magick/list.h"
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#include "magick/log.h"
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#include "magick/magick.h"
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#include "magick/memory_.h"
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#include "magick/monitor.h"
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#include "magick/monitor-private.h"
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#include "magick/pixel-accessor.h"
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#include "magick/quantum-private.h"
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#include "magick/static.h"
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#include "magick/string_.h"
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#include "magick/module.h"
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#include "magick/transform.h"
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/*
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Typedef declarations.
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*/
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typedef struct _DIBInfo
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{
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unsigned int
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size;
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int
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width,
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height;
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unsigned short
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planes,
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bits_per_pixel;
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unsigned int
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compression,
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image_size,
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x_pixels,
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y_pixels,
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number_colors,
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colors_important;
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unsigned short
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red_mask,
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green_mask,
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blue_mask,
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alpha_mask;
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int
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colorspace;
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PointInfo
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red_primary,
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green_primary,
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blue_primary,
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gamma_scale;
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} DIBInfo;
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteDIBImage(const ImageInfo *,Image *);
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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||
% %
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% D e c o d e I m a g e %
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||
% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% DecodeImage unpacks the packed image pixels into runlength-encoded
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% pixel packets.
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%
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% The format of the DecodeImage method is:
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%
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% MagickBooleanType DecodeImage(Image *image,
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% const MagickBooleanType compression,unsigned char *pixels,
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% const size_t number_pixels)
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%
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% A description of each parameter follows:
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%
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% o image: the address of a structure of type Image.
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%
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% o compression: A value of 1 means the compressed pixels are runlength
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% encoded for a 256-color bitmap. A value of 2 means a 16-color bitmap.
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%
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% o pixels: The address of a byte (8 bits) array of pixel data created by
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% the decoding process.
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%
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% o number_pixels: The number of pixels.
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%
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*/
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static MagickBooleanType DecodeImage(Image *image,
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const MagickBooleanType compression,unsigned char *pixels,
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const size_t number_pixels)
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{
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#if !defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__MINGW32__)
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#define BI_RGB 0
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#define BI_RLE8 1
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#define BI_RLE4 2
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#define BI_BITFIELDS 3
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#undef BI_JPEG
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#define BI_JPEG 4
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#undef BI_PNG
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#define BI_PNG 5
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#endif
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int
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byte,
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count;
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ssize_t
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y;
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ssize_t
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i,
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x;
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unsigned char
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*p,
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*q;
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assert(image != (Image *) NULL);
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assert(image->signature == MagickCoreSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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assert(pixels != (unsigned char *) NULL);
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(void) memset(pixels,0,number_pixels*sizeof(*pixels));
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byte=0;
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x=0;
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p=pixels;
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q=pixels+number_pixels;
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for (y=0; y < (ssize_t) image->rows; )
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{
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MagickBooleanType
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status;
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if ((p < pixels) || (p >= q))
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break;
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count=ReadBlobByte(image);
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if (count == EOF)
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break;
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if (count > 0)
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{
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/*
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Encoded mode.
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*/
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count=(int) MagickMin((size_t) count,(size_t) (q-p));
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byte=ReadBlobByte(image);
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if (byte == EOF)
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break;
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if (compression == BI_RLE8)
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{
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for (i=0; i < (ssize_t) count; i++)
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*p++=(unsigned char) byte;
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}
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else
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{
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for (i=0; i < (ssize_t) count; i++)
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*p++=(unsigned char)
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((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
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}
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x+=count;
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}
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else
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{
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/*
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Escape mode.
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*/
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count=ReadBlobByte(image);
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if (count == EOF)
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break;
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if (count == 0x01)
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return(MagickTrue);
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switch (count)
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{
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case 0x00:
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{
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/*
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End of line.
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*/
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x=0;
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y++;
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p=pixels+y*image->columns;
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break;
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}
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case 0x02:
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{
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/*
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Delta mode.
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*/
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x+=ReadBlobByte(image);
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y+=ReadBlobByte(image);
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p=pixels+y*image->columns+x;
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break;
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}
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default:
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{
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/*
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Absolute mode.
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*/
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count=(int) MagickMin((size_t) count,(size_t) (q-p));
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if (compression == BI_RLE8)
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for (i=0; i < (ssize_t) count; i++)
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{
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byte=ReadBlobByte(image);
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if (byte == EOF)
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break;
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*p++=(unsigned char) byte;
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}
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else
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for (i=0; i < (ssize_t) count; i++)
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{
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if ((i & 0x01) == 0)
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{
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byte=ReadBlobByte(image);
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if (byte == EOF)
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break;
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}
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*p++=(unsigned char)
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((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
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}
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x+=count;
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/*
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Read pad byte.
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*/
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if (compression == BI_RLE8)
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{
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if ((count & 0x01) != 0)
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if (ReadBlobByte(image) == EOF)
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break;
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}
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else
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if (((count & 0x03) == 1) || ((count & 0x03) == 2))
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if (ReadBlobByte(image) == EOF)
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break;
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break;
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}
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}
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}
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status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
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image->rows);
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if (status == MagickFalse)
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break;
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}
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(void) ReadBlobByte(image); /* end of line */
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(void) ReadBlobByte(image);
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return(y < (ssize_t) image->rows ? MagickFalse : MagickTrue);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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||
% %
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% E n c o d e I m a g e %
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||
% %
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||
% %
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||
% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% EncodeImage compresses pixels using a runlength encoded format.
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%
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% The format of the EncodeImage method is:
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%
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% static MagickBooleanType EncodeImage(Image *image,
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% const size_t bytes_per_line,const unsigned char *pixels,
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% unsigned char *compressed_pixels)
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%
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% A description of each parameter follows:
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%
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% o image: The image.
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%
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% o bytes_per_line: the number of bytes in a scanline of compressed pixels
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%
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% o pixels: The address of a byte (8 bits) array of pixel data created by
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% the compression process.
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%
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% o compressed_pixels: The address of a byte (8 bits) array of compressed
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% pixel data.
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%
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*/
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static size_t EncodeImage(Image *image,const size_t bytes_per_line,
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const unsigned char *pixels,unsigned char *compressed_pixels)
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{
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ssize_t
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y;
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|
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const unsigned char
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*p;
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||
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ssize_t
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i,
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x;
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unsigned char
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*q;
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/*
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Runlength encode pixels.
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*/
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assert(image != (Image *) NULL);
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assert(image->signature == MagickCoreSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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assert(pixels != (const unsigned char *) NULL);
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assert(compressed_pixels != (unsigned char *) NULL);
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p=pixels;
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q=compressed_pixels;
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i=0;
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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for (x=0; x < (ssize_t) bytes_per_line; x+=i)
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{
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/*
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Determine runlength.
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*/
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for (i=1; ((x+i) < (ssize_t) bytes_per_line); i++)
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if ((*(p+i) != *p) || (i == 255))
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break;
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*q++=(unsigned char) i;
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*q++=(*p);
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p+=i;
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}
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/*
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End of line.
|
||
*/
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*q++=0x00;
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*q++=0x00;
|
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if (SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows) == MagickFalse)
|
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break;
|
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}
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/*
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End of bitmap.
|
||
*/
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*q++=0;
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*q++=0x01;
|
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return((size_t) (q-compressed_pixels));
|
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}
|
||
|
||
/*
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||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
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||
% %
|
||
% %
|
||
% I s D I B %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
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||
% IsDIB() returns MagickTrue if the image format type, identified by the
|
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% magick string, is DIB.
|
||
%
|
||
% The format of the IsDIB method is:
|
||
%
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||
% MagickBooleanType IsDIB(const unsigned char *magick,const size_t length)
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||
%
|
||
% A description of each parameter follows:
|
||
%
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||
% o magick: compare image format pattern against these bytes.
|
||
%
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||
% o length: Specifies the length of the magick string.
|
||
%
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||
*/
|
||
static MagickBooleanType IsDIB(const unsigned char *magick,const size_t length)
|
||
{
|
||
if (length < 2)
|
||
return(MagickFalse);
|
||
if (memcmp(magick,"\050\000",2) == 0)
|
||
return(MagickTrue);
|
||
return(MagickFalse);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e a d D I B I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ReadDIBImage() reads a Microsoft Windows bitmap image file and
|
||
% returns it. It allocates the memory necessary for the new Image structure
|
||
% and returns a pointer to the new image.
|
||
%
|
||
% The format of the ReadDIBImage method is:
|
||
%
|
||
% image=ReadDIBImage(image_info)
|
||
%
|
||
% A description of each parameter follows:
|
||
%
|
||
% o image_info: the image info.
|
||
%
|
||
% o exception: return any errors or warnings in this structure.
|
||
%
|
||
*/
|
||
static Image *ReadDIBImage(const ImageInfo *image_info,ExceptionInfo *exception)
|
||
{
|
||
DIBInfo
|
||
dib_info;
|
||
|
||
Image
|
||
*image;
|
||
|
||
IndexPacket
|
||
index;
|
||
|
||
ssize_t
|
||
bit,
|
||
y;
|
||
|
||
MagickBooleanType
|
||
status;
|
||
|
||
MemoryInfo
|
||
*pixel_info;
|
||
|
||
IndexPacket
|
||
*indexes;
|
||
|
||
ssize_t
|
||
x;
|
||
|
||
PixelPacket
|
||
*q;
|
||
|
||
ssize_t
|
||
i;
|
||
|
||
unsigned char
|
||
*p;
|
||
|
||
size_t
|
||
bytes_per_line,
|
||
length;
|
||
|
||
ssize_t
|
||
count;
|
||
|
||
unsigned char
|
||
*pixels;
|
||
|
||
/*
|
||
Open image file.
|
||
*/
|
||
assert(image_info != (const ImageInfo *) NULL);
|
||
assert(image_info->signature == MagickCoreSignature);
|
||
if (image_info->debug != MagickFalse)
|
||
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
|
||
image_info->filename);
|
||
assert(exception != (ExceptionInfo *) NULL);
|
||
assert(exception->signature == MagickCoreSignature);
|
||
image=AcquireImage(image_info);
|
||
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
|
||
if (status == MagickFalse)
|
||
{
|
||
image=DestroyImageList(image);
|
||
return((Image *) NULL);
|
||
}
|
||
/*
|
||
Determine if this a DIB file.
|
||
*/
|
||
(void) memset(&dib_info,0,sizeof(dib_info));
|
||
dib_info.size=ReadBlobLSBLong(image);
|
||
if (dib_info.size != 40)
|
||
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
||
/*
|
||
Microsoft Windows 3.X DIB image file.
|
||
*/
|
||
dib_info.width=ReadBlobLSBSignedLong(image);
|
||
dib_info.height=ReadBlobLSBSignedLong(image);
|
||
dib_info.planes=ReadBlobLSBShort(image);
|
||
dib_info.bits_per_pixel=ReadBlobLSBShort(image);
|
||
dib_info.compression=ReadBlobLSBLong(image);
|
||
dib_info.image_size=ReadBlobLSBLong(image);
|
||
dib_info.x_pixels=ReadBlobLSBLong(image);
|
||
dib_info.y_pixels=ReadBlobLSBLong(image);
|
||
dib_info.number_colors=ReadBlobLSBLong(image);
|
||
dib_info.colors_important=ReadBlobLSBLong(image);
|
||
if ((dib_info.bits_per_pixel != 1) && (dib_info.bits_per_pixel != 4) &&
|
||
(dib_info.bits_per_pixel != 8) && (dib_info.bits_per_pixel != 16) &&
|
||
(dib_info.bits_per_pixel != 24) && (dib_info.bits_per_pixel != 32))
|
||
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
||
if ((dib_info.compression == BI_BITFIELDS) &&
|
||
((dib_info.bits_per_pixel == 16) || (dib_info.bits_per_pixel == 32)))
|
||
{
|
||
dib_info.red_mask=(unsigned short) ReadBlobLSBLong(image);
|
||
dib_info.green_mask=(unsigned short) ReadBlobLSBLong(image);
|
||
dib_info.blue_mask=(unsigned short) ReadBlobLSBLong(image);
|
||
}
|
||
if (EOFBlob(image) != MagickFalse)
|
||
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
|
||
if (dib_info.width <= 0)
|
||
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
|
||
if (dib_info.height == 0)
|
||
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
|
||
if (dib_info.planes != 1)
|
||
ThrowReaderException(CorruptImageError,"StaticPlanesValueNotEqualToOne");
|
||
if ((dib_info.bits_per_pixel != 1) && (dib_info.bits_per_pixel != 4) &&
|
||
(dib_info.bits_per_pixel != 8) && (dib_info.bits_per_pixel != 16) &&
|
||
(dib_info.bits_per_pixel != 24) && (dib_info.bits_per_pixel != 32))
|
||
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
||
if ((dib_info.bits_per_pixel < 16) &&
|
||
(dib_info.number_colors > (unsigned int) (1UL << dib_info.bits_per_pixel)))
|
||
ThrowReaderException(CorruptImageError,"UnrecognizedNumberOfColors");
|
||
if ((dib_info.compression == 1) && (dib_info.bits_per_pixel != 8))
|
||
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
||
if ((dib_info.compression == 2) && (dib_info.bits_per_pixel != 4))
|
||
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
||
if ((dib_info.compression == 3) && (dib_info.bits_per_pixel < 16))
|
||
ThrowReaderException(CorruptImageError,"UnsupportedBitsPerPixel");
|
||
switch (dib_info.compression)
|
||
{
|
||
case BI_RGB:
|
||
case BI_RLE8:
|
||
case BI_RLE4:
|
||
case BI_BITFIELDS:
|
||
break;
|
||
case BI_JPEG:
|
||
ThrowReaderException(CoderError,"JPEGCompressNotSupported");
|
||
case BI_PNG:
|
||
ThrowReaderException(CoderError,"PNGCompressNotSupported");
|
||
default:
|
||
ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
|
||
}
|
||
image->columns=(size_t) MagickAbsoluteValue((ssize_t) dib_info.width);
|
||
image->rows=(size_t) MagickAbsoluteValue((ssize_t) dib_info.height);
|
||
image->matte=dib_info.bits_per_pixel == 32 ? MagickTrue : MagickFalse;
|
||
image->depth=8;
|
||
if ((dib_info.number_colors > 256) || (dib_info.colors_important > 256))
|
||
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
||
if ((dib_info.number_colors != 0) && (dib_info.bits_per_pixel > 8))
|
||
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
||
if ((dib_info.image_size != 0U) && (dib_info.image_size > GetBlobSize(image)))
|
||
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
|
||
if ((dib_info.number_colors != 0) || (dib_info.bits_per_pixel <= 8))
|
||
{
|
||
size_t
|
||
one;
|
||
|
||
image->storage_class=PseudoClass;
|
||
image->colors=dib_info.number_colors;
|
||
one=1;
|
||
if (image->colors == 0)
|
||
image->colors=one << dib_info.bits_per_pixel;
|
||
}
|
||
if (image_info->size != (char *) NULL)
|
||
{
|
||
RectangleInfo
|
||
geometry;
|
||
|
||
MagickStatusType
|
||
flags;
|
||
|
||
flags=ParseAbsoluteGeometry(image_info->size,&geometry);
|
||
if (flags & WidthValue)
|
||
if ((geometry.width != 0) && (geometry.width < image->columns))
|
||
image->columns=geometry.width;
|
||
if (flags & HeightValue)
|
||
if ((geometry.height != 0) && (geometry.height < image->rows))
|
||
image->rows=geometry.height;
|
||
}
|
||
status=SetImageExtent(image,image->columns,image->rows);
|
||
if (status == MagickFalse)
|
||
{
|
||
InheritException(exception,&image->exception);
|
||
return(DestroyImageList(image));
|
||
}
|
||
if (image->storage_class == PseudoClass)
|
||
{
|
||
size_t
|
||
length,
|
||
packet_size;
|
||
|
||
unsigned char
|
||
*dib_colormap;
|
||
|
||
/*
|
||
Read DIB raster colormap.
|
||
*/
|
||
if (AcquireImageColormap(image,image->colors) == MagickFalse)
|
||
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
||
length=(size_t) image->colors;
|
||
dib_colormap=(unsigned char *) AcquireQuantumMemory(length,
|
||
4*sizeof(*dib_colormap));
|
||
if (dib_colormap == (unsigned char *) NULL)
|
||
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
||
packet_size=4;
|
||
count=ReadBlob(image,packet_size*image->colors,dib_colormap);
|
||
if (count != (ssize_t) (packet_size*image->colors))
|
||
{
|
||
dib_colormap=(unsigned char *) RelinquishMagickMemory(dib_colormap);
|
||
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
|
||
}
|
||
p=dib_colormap;
|
||
for (i=0; i < (ssize_t) image->colors; i++)
|
||
{
|
||
image->colormap[i].blue=ScaleCharToQuantum(*p++);
|
||
image->colormap[i].green=ScaleCharToQuantum(*p++);
|
||
image->colormap[i].red=ScaleCharToQuantum(*p++);
|
||
if (packet_size == 4)
|
||
p++;
|
||
}
|
||
dib_colormap=(unsigned char *) RelinquishMagickMemory(dib_colormap);
|
||
}
|
||
/*
|
||
Read image data.
|
||
*/
|
||
if (dib_info.compression == BI_RLE4)
|
||
dib_info.bits_per_pixel<<=1;
|
||
bytes_per_line=4*((image->columns*dib_info.bits_per_pixel+31)/32);
|
||
length=bytes_per_line*image->rows;
|
||
if ((MagickSizeType) length > (256*GetBlobSize(image)))
|
||
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
|
||
pixel_info=AcquireVirtualMemory(image->rows,MagickMax(bytes_per_line,
|
||
image->columns+256UL)*sizeof(*pixels));
|
||
if (pixel_info == (MemoryInfo *) NULL)
|
||
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
||
pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
|
||
if ((dib_info.compression == BI_RGB) ||
|
||
(dib_info.compression == BI_BITFIELDS))
|
||
{
|
||
count=ReadBlob(image,length,pixels);
|
||
if (count != (ssize_t) (length))
|
||
{
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
Convert run-length encoded raster pixels.
|
||
*/
|
||
status=DecodeImage(image,dib_info.compression ? MagickTrue : MagickFalse,
|
||
pixels,image->columns*image->rows);
|
||
if (status == MagickFalse)
|
||
{
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(CorruptImageError,
|
||
"UnableToRunlengthDecodeImage");
|
||
}
|
||
}
|
||
/*
|
||
Initialize image structure.
|
||
*/
|
||
image->units=PixelsPerCentimeterResolution;
|
||
image->x_resolution=(double) dib_info.x_pixels/100.0;
|
||
image->y_resolution=(double) dib_info.y_pixels/100.0;
|
||
/*
|
||
Convert DIB raster image to pixel packets.
|
||
*/
|
||
switch (dib_info.bits_per_pixel)
|
||
{
|
||
case 1:
|
||
{
|
||
/*
|
||
Convert bitmap scanline.
|
||
*/
|
||
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
||
{
|
||
p=pixels+(image->rows-y-1)*bytes_per_line;
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetAuthenticIndexQueue(image);
|
||
for (x=0; x < ((ssize_t) image->columns-7); x+=8)
|
||
{
|
||
for (bit=0; bit < 8; bit++)
|
||
{
|
||
index=(IndexPacket) ((*p) & (0x80 >> bit) ? 0x01 : 0x00);
|
||
SetPixelIndex(indexes+x+bit,index);
|
||
}
|
||
p++;
|
||
}
|
||
if ((image->columns % 8) != 0)
|
||
{
|
||
for (bit=0; bit < (ssize_t) (image->columns % 8); bit++)
|
||
{
|
||
index=(IndexPacket) ((*p) & (0x80 >> bit) ? 0x01 : 0x00);
|
||
SetPixelIndex(indexes+x+bit,index);
|
||
}
|
||
p++;
|
||
}
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
||
image->rows-y-1,image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
(void) SyncImage(image);
|
||
break;
|
||
}
|
||
case 4:
|
||
{
|
||
/*
|
||
Convert PseudoColor scanline.
|
||
*/
|
||
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
||
{
|
||
p=pixels+(image->rows-y-1)*bytes_per_line;
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetAuthenticIndexQueue(image);
|
||
for (x=0; x < ((ssize_t) image->columns-1); x+=2)
|
||
{
|
||
index=ConstrainColormapIndex(image,(*p >> 4) & 0xf);
|
||
SetPixelIndex(indexes+x,index);
|
||
index=ConstrainColormapIndex(image,*p & 0xf);
|
||
SetPixelIndex(indexes+x+1,index);
|
||
p++;
|
||
}
|
||
if ((image->columns % 2) != 0)
|
||
{
|
||
index=ConstrainColormapIndex(image,(*p >> 4) & 0xf);
|
||
SetPixelIndex(indexes+x,index);
|
||
p++;
|
||
}
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
||
image->rows-y-1,image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
(void) SyncImage(image);
|
||
break;
|
||
}
|
||
case 8:
|
||
{
|
||
/*
|
||
Convert PseudoColor scanline.
|
||
*/
|
||
if ((dib_info.compression == BI_RLE8) ||
|
||
(dib_info.compression == BI_RLE4))
|
||
bytes_per_line=image->columns;
|
||
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
||
{
|
||
p=pixels+(image->rows-y-1)*bytes_per_line;
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetAuthenticIndexQueue(image);
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
index=ConstrainColormapIndex(image,*p);
|
||
SetPixelIndex(indexes+x,index);
|
||
p++;
|
||
q++;
|
||
}
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
||
image->rows-y-1,image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
(void) SyncImage(image);
|
||
break;
|
||
}
|
||
case 16:
|
||
{
|
||
unsigned short
|
||
word;
|
||
|
||
/*
|
||
Convert PseudoColor scanline.
|
||
*/
|
||
image->storage_class=DirectClass;
|
||
if (dib_info.compression == BI_RLE8)
|
||
bytes_per_line=2*image->columns;
|
||
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
||
{
|
||
p=pixels+(image->rows-y-1)*bytes_per_line;
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
word=(*p++);
|
||
word|=(*p++ << 8);
|
||
if (dib_info.red_mask == 0)
|
||
{
|
||
SetPixelRed(q,ScaleCharToQuantum(ScaleColor5to8(
|
||
(unsigned char) ((word >> 10) & 0x1f))));
|
||
SetPixelGreen(q,ScaleCharToQuantum(ScaleColor5to8(
|
||
(unsigned char) ((word >> 5) & 0x1f))));
|
||
SetPixelBlue(q,ScaleCharToQuantum(ScaleColor5to8(
|
||
(unsigned char) (word & 0x1f))));
|
||
}
|
||
else
|
||
{
|
||
SetPixelRed(q,ScaleCharToQuantum(ScaleColor5to8(
|
||
(unsigned char) ((word >> 11) & 0x1f))));
|
||
SetPixelGreen(q,ScaleCharToQuantum(ScaleColor6to8(
|
||
(unsigned char) ((word >> 5) & 0x3f))));
|
||
SetPixelBlue(q,ScaleCharToQuantum(ScaleColor5to8(
|
||
(unsigned char) (word & 0x1f))));
|
||
}
|
||
q++;
|
||
}
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
||
image->rows-y-1,image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case 24:
|
||
case 32:
|
||
{
|
||
/*
|
||
Convert DirectColor scanline.
|
||
*/
|
||
for (y=(ssize_t) image->rows-1; y >= 0; y--)
|
||
{
|
||
p=pixels+(image->rows-y-1)*bytes_per_line;
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
SetPixelBlue(q,ScaleCharToQuantum(*p++));
|
||
SetPixelGreen(q,ScaleCharToQuantum(*p++));
|
||
SetPixelRed(q,ScaleCharToQuantum(*p++));
|
||
if (image->matte != MagickFalse)
|
||
SetPixelOpacity(q,ScaleCharToQuantum(*p++));
|
||
q++;
|
||
}
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
||
image->rows-y-1,image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
{
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
||
}
|
||
}
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
if (strcmp(image_info->magick,"ICODIB") == 0)
|
||
{
|
||
int
|
||
c;
|
||
|
||
/*
|
||
Handle ICO mask.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
ssize_t
|
||
x;
|
||
|
||
PixelPacket
|
||
*magick_restrict q;
|
||
|
||
q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
for (x=0; x < ((ssize_t) image->columns-7); x+=8)
|
||
{
|
||
c=ReadBlobByte(image);
|
||
for (bit=0; bit < 8; bit++)
|
||
{
|
||
SetPixelOpacity(q+x+bit,c & (0x80 >> bit) ? TransparentOpacity :
|
||
OpaqueOpacity);
|
||
if (c & (0x80 >> bit))
|
||
image->matte=MagickTrue;
|
||
}
|
||
}
|
||
if ((image->columns % 8) != 0)
|
||
{
|
||
c=ReadBlobByte(image);
|
||
for (bit=0; bit < (ssize_t) (image->columns % 8); bit++)
|
||
{
|
||
SetPixelOpacity(q+x+bit,c & (0x80 >> bit) ? TransparentOpacity :
|
||
OpaqueOpacity);
|
||
if (c & (0x80 >> bit))
|
||
image->matte=MagickTrue;
|
||
}
|
||
}
|
||
if (image->columns % 32)
|
||
for (x=0; x < (ssize_t) ((32-(image->columns % 32))/8); x++)
|
||
c=ReadBlobByte(image);
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
}
|
||
if ((image->storage_class == PseudoClass) && (image->matte == MagickTrue))
|
||
image->storage_class=DirectClass;
|
||
}
|
||
if (dib_info.height < 0)
|
||
{
|
||
Image
|
||
*flipped_image;
|
||
|
||
/*
|
||
Correct image orientation.
|
||
*/
|
||
flipped_image=FlipImage(image,exception);
|
||
if (flipped_image != (Image *) NULL)
|
||
{
|
||
DuplicateBlob(flipped_image,image);
|
||
image=DestroyImage(image);
|
||
image=flipped_image;
|
||
}
|
||
}
|
||
if (EOFBlob(image) != MagickFalse)
|
||
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
|
||
image->filename);
|
||
(void) CloseBlob(image);
|
||
return(GetFirstImageInList(image));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e g i s t e r D I B I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% RegisterDIBImage() adds attributes for the DIB image format to
|
||
% the list of supported formats. The attributes include the image format
|
||
% tag, a method to read and/or write the format, whether the format
|
||
% supports the saving of more than one frame to the same file or blob,
|
||
% whether the format supports native in-memory I/O, and a brief
|
||
% description of the format.
|
||
%
|
||
% The format of the RegisterDIBImage method is:
|
||
%
|
||
% size_t RegisterDIBImage(void)
|
||
%
|
||
*/
|
||
ModuleExport size_t RegisterDIBImage(void)
|
||
{
|
||
MagickInfo
|
||
*entry;
|
||
|
||
entry=SetMagickInfo("DIB");
|
||
entry->decoder=(DecodeImageHandler *) ReadDIBImage;
|
||
entry->encoder=(EncodeImageHandler *) WriteDIBImage;
|
||
entry->magick=(IsImageFormatHandler *) IsDIB;
|
||
entry->adjoin=MagickFalse;
|
||
entry->seekable_stream=MagickTrue;
|
||
entry->stealth=MagickTrue;
|
||
entry->description=ConstantString(
|
||
"Microsoft Windows 3.X Packed Device-Independent Bitmap");
|
||
entry->magick_module=ConstantString("DIB");
|
||
(void) RegisterMagickInfo(entry);
|
||
entry=SetMagickInfo("ICODIB");
|
||
entry->decoder=(DecodeImageHandler *) ReadDIBImage;
|
||
entry->magick=(IsImageFormatHandler *) IsDIB;
|
||
entry->adjoin=MagickFalse;
|
||
entry->seekable_stream=MagickTrue;
|
||
entry->stealth=MagickTrue;
|
||
entry->description=ConstantString(
|
||
"Microsoft Windows 3.X Packed Device-Independent Bitmap");
|
||
entry->magick_module=ConstantString("DIB");
|
||
(void) RegisterMagickInfo(entry);
|
||
return(MagickImageCoderSignature);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% U n r e g i s t e r D I B I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% UnregisterDIBImage() removes format registrations made by the
|
||
% DIB module from the list of supported formats.
|
||
%
|
||
% The format of the UnregisterDIBImage method is:
|
||
%
|
||
% UnregisterDIBImage(void)
|
||
%
|
||
*/
|
||
ModuleExport void UnregisterDIBImage(void)
|
||
{
|
||
(void) UnregisterMagickInfo("ICODIB");
|
||
(void) UnregisterMagickInfo("DIB");
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% W r i t e D I B I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% WriteDIBImage() writes an image in Microsoft Windows bitmap encoded
|
||
% image format.
|
||
%
|
||
% The format of the WriteDIBImage method is:
|
||
%
|
||
% MagickBooleanType WriteDIBImage(const ImageInfo *image_info,Image *image)
|
||
%
|
||
% A description of each parameter follows.
|
||
%
|
||
% o image_info: the image info.
|
||
%
|
||
% o image: The image.
|
||
%
|
||
*/
|
||
static MagickBooleanType WriteDIBImage(const ImageInfo *image_info,Image *image)
|
||
{
|
||
DIBInfo
|
||
dib_info;
|
||
|
||
MagickBooleanType
|
||
status;
|
||
|
||
const IndexPacket
|
||
*indexes;
|
||
|
||
const PixelPacket
|
||
*p;
|
||
|
||
ssize_t
|
||
i,
|
||
x;
|
||
|
||
unsigned char
|
||
*q;
|
||
|
||
size_t
|
||
bytes_per_line;
|
||
|
||
ssize_t
|
||
y;
|
||
|
||
unsigned char
|
||
*dib_data,
|
||
*pixels;
|
||
|
||
/*
|
||
Open output image file.
|
||
*/
|
||
assert(image_info != (const ImageInfo *) NULL);
|
||
assert(image_info->signature == MagickCoreSignature);
|
||
assert(image != (Image *) NULL);
|
||
assert(image->signature == MagickCoreSignature);
|
||
if (image->debug != MagickFalse)
|
||
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
|
||
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
|
||
if (status == MagickFalse)
|
||
return(status);
|
||
if (((image->columns << 3) != (size_t) ((int) (image->columns << 3))) ||
|
||
((image->rows << 3) != (size_t) ((int) (image->rows << 3))))
|
||
ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
|
||
/*
|
||
Initialize DIB raster file header.
|
||
*/
|
||
(void) TransformImageColorspace(image,sRGBColorspace);
|
||
if (image->storage_class == DirectClass)
|
||
{
|
||
/*
|
||
Full color DIB raster.
|
||
*/
|
||
dib_info.number_colors=0;
|
||
dib_info.bits_per_pixel=(unsigned short) (image->matte ? 32 : 24);
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
Colormapped DIB raster.
|
||
*/
|
||
dib_info.bits_per_pixel=8;
|
||
if (image_info->depth > 8)
|
||
dib_info.bits_per_pixel=16;
|
||
if (SetImageMonochrome(image,&image->exception) != MagickFalse)
|
||
dib_info.bits_per_pixel=1;
|
||
dib_info.number_colors=(unsigned int) (dib_info.bits_per_pixel == 16 ? 0 :
|
||
(1UL << dib_info.bits_per_pixel));
|
||
}
|
||
bytes_per_line=4*((image->columns*dib_info.bits_per_pixel+31)/32);
|
||
dib_info.size=40;
|
||
dib_info.width=(int) image->columns;
|
||
dib_info.height=(int) image->rows;
|
||
dib_info.planes=1;
|
||
dib_info.compression=(unsigned int) (dib_info.bits_per_pixel == 16 ?
|
||
BI_BITFIELDS : BI_RGB);
|
||
dib_info.image_size=(unsigned int) (bytes_per_line*image->rows);
|
||
dib_info.x_pixels=75*39;
|
||
dib_info.y_pixels=75*39;
|
||
switch (image->units)
|
||
{
|
||
case UndefinedResolution:
|
||
case PixelsPerInchResolution:
|
||
{
|
||
dib_info.x_pixels=(unsigned int) (100.0*image->x_resolution/2.54);
|
||
dib_info.y_pixels=(unsigned int) (100.0*image->y_resolution/2.54);
|
||
break;
|
||
}
|
||
case PixelsPerCentimeterResolution:
|
||
{
|
||
dib_info.x_pixels=(unsigned int) (100.0*image->x_resolution);
|
||
dib_info.y_pixels=(unsigned int) (100.0*image->y_resolution);
|
||
break;
|
||
}
|
||
}
|
||
dib_info.colors_important=dib_info.number_colors;
|
||
/*
|
||
Convert MIFF to DIB raster pixels.
|
||
*/
|
||
pixels=(unsigned char *) AcquireQuantumMemory(image->rows,MagickMax(
|
||
bytes_per_line,image->columns+256UL)*sizeof(*pixels));
|
||
if (pixels == (unsigned char *) NULL)
|
||
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
||
(void) memset(pixels,0,dib_info.image_size);
|
||
switch (dib_info.bits_per_pixel)
|
||
{
|
||
case 1:
|
||
{
|
||
unsigned char
|
||
bit,
|
||
byte;
|
||
|
||
/*
|
||
Convert PseudoClass image to a DIB monochrome image.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
|
||
if (p == (const PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetVirtualIndexQueue(image);
|
||
q=pixels+(image->rows-y-1)*bytes_per_line;
|
||
bit=0;
|
||
byte=0;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
byte<<=1;
|
||
byte|=GetPixelIndex(indexes+x) != 0 ? 0x01 : 0x00;
|
||
bit++;
|
||
if (bit == 8)
|
||
{
|
||
*q++=byte;
|
||
bit=0;
|
||
byte=0;
|
||
}
|
||
p++;
|
||
}
|
||
if (bit != 0)
|
||
{
|
||
*q++=(unsigned char) (byte << (8-bit));
|
||
x++;
|
||
}
|
||
for (x=(ssize_t) (image->columns+7)/8; x < (ssize_t) bytes_per_line; x++)
|
||
*q++=0x00;
|
||
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
case 8:
|
||
{
|
||
/*
|
||
Convert PseudoClass packet to DIB pixel.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
|
||
if (p == (const PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetVirtualIndexQueue(image);
|
||
q=pixels+(image->rows-y-1)*bytes_per_line;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
*q++=(unsigned char) ((size_t) GetPixelIndex(indexes+x));
|
||
for ( ; x < (ssize_t) bytes_per_line; x++)
|
||
*q++=0x00;
|
||
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
case 16:
|
||
{
|
||
unsigned short
|
||
word;
|
||
/*
|
||
Convert PseudoClass packet to DIB pixel.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
|
||
if (p == (const PixelPacket *) NULL)
|
||
break;
|
||
q=pixels+(image->rows-y-1)*bytes_per_line;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
word=(unsigned short) ((ScaleColor8to5((unsigned char)
|
||
ScaleQuantumToChar(GetPixelRed(p))) << 11) |
|
||
(ScaleColor8to6((unsigned char) ScaleQuantumToChar(
|
||
GetPixelGreen(p))) << 5) | (ScaleColor8to5((unsigned char)
|
||
ScaleQuantumToChar((unsigned char) GetPixelBlue(p)) <<
|
||
0)));
|
||
*q++=(unsigned char)(word & 0xff);
|
||
*q++=(unsigned char)(word >> 8);
|
||
p++;
|
||
}
|
||
for (x=(ssize_t) (2*image->columns); x < (ssize_t) bytes_per_line; x++)
|
||
*q++=0x00;
|
||
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
case 24:
|
||
case 32:
|
||
{
|
||
/*
|
||
Convert DirectClass packet to DIB RGB pixel.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
|
||
if (p == (const PixelPacket *) NULL)
|
||
break;
|
||
q=pixels+(image->rows-y-1)*bytes_per_line;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
*q++=ScaleQuantumToChar(GetPixelBlue(p));
|
||
*q++=ScaleQuantumToChar(GetPixelGreen(p));
|
||
*q++=ScaleQuantumToChar(GetPixelRed(p));
|
||
if (image->matte != MagickFalse)
|
||
*q++=ScaleQuantumToChar(GetPixelOpacity(p));
|
||
p++;
|
||
}
|
||
if (dib_info.bits_per_pixel == 24)
|
||
for (x=(ssize_t) (3*image->columns); x < (ssize_t) bytes_per_line; x++)
|
||
*q++=0x00;
|
||
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
if (dib_info.bits_per_pixel == 8)
|
||
if (image_info->compression != NoCompression)
|
||
{
|
||
size_t
|
||
length;
|
||
|
||
/*
|
||
Convert run-length encoded raster pixels.
|
||
*/
|
||
length=2UL*(bytes_per_line+2UL)+2UL;
|
||
dib_data=(unsigned char *) AcquireQuantumMemory(length,
|
||
(image->rows+2UL)*sizeof(*dib_data));
|
||
if (dib_data == (unsigned char *) NULL)
|
||
{
|
||
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
||
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
||
}
|
||
dib_info.image_size=(unsigned int) EncodeImage(image,bytes_per_line,
|
||
pixels,dib_data);
|
||
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
||
pixels=dib_data;
|
||
dib_info.compression = BI_RLE8;
|
||
}
|
||
/*
|
||
Write DIB header.
|
||
*/
|
||
(void) WriteBlobLSBLong(image,dib_info.size);
|
||
(void) WriteBlobLSBLong(image,(unsigned int) dib_info.width);
|
||
(void) WriteBlobLSBLong(image,(unsigned int) dib_info.height);
|
||
(void) WriteBlobLSBShort(image,dib_info.planes);
|
||
(void) WriteBlobLSBShort(image,dib_info.bits_per_pixel);
|
||
(void) WriteBlobLSBLong(image,dib_info.compression);
|
||
(void) WriteBlobLSBLong(image,dib_info.image_size);
|
||
(void) WriteBlobLSBLong(image,dib_info.x_pixels);
|
||
(void) WriteBlobLSBLong(image,dib_info.y_pixels);
|
||
(void) WriteBlobLSBLong(image,dib_info.number_colors);
|
||
(void) WriteBlobLSBLong(image,dib_info.colors_important);
|
||
if (image->storage_class == PseudoClass)
|
||
{
|
||
if (dib_info.bits_per_pixel <= 8)
|
||
{
|
||
unsigned char
|
||
*dib_colormap;
|
||
|
||
/*
|
||
Dump colormap to file.
|
||
*/
|
||
dib_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
|
||
(1UL << dib_info.bits_per_pixel),4*sizeof(*dib_colormap));
|
||
if (dib_colormap == (unsigned char *) NULL)
|
||
{
|
||
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
||
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
||
}
|
||
q=dib_colormap;
|
||
for (i=0; i < (ssize_t) MagickMin(image->colors,dib_info.number_colors); i++)
|
||
{
|
||
*q++=ScaleQuantumToChar(image->colormap[i].blue);
|
||
*q++=ScaleQuantumToChar(image->colormap[i].green);
|
||
*q++=ScaleQuantumToChar(image->colormap[i].red);
|
||
*q++=(Quantum) 0x0;
|
||
}
|
||
for ( ; i < (ssize_t) (1L << dib_info.bits_per_pixel); i++)
|
||
{
|
||
*q++=(Quantum) 0x0;
|
||
*q++=(Quantum) 0x0;
|
||
*q++=(Quantum) 0x0;
|
||
*q++=(Quantum) 0x0;
|
||
}
|
||
(void) WriteBlob(image,(size_t) (4*(1 << dib_info.bits_per_pixel)),
|
||
dib_colormap);
|
||
dib_colormap=(unsigned char *) RelinquishMagickMemory(dib_colormap);
|
||
}
|
||
else
|
||
if ((dib_info.bits_per_pixel == 16) &&
|
||
(dib_info.compression == BI_BITFIELDS))
|
||
{
|
||
(void) WriteBlobLSBLong(image,0xf800);
|
||
(void) WriteBlobLSBLong(image,0x07e0);
|
||
(void) WriteBlobLSBLong(image,0x001f);
|
||
}
|
||
}
|
||
(void) WriteBlob(image,dib_info.image_size,pixels);
|
||
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
||
(void) CloseBlob(image);
|
||
return(MagickTrue);
|
||
}
|