/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- IsXWD
- ReadXWDImage
- RegisterXWDImage
- UnregisterXWDImage
- WriteXWDImage
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% X X W W DDDD %
% X X W W D D %
% X W W D D %
% X X W W W D D %
% X X W W DDDD %
% %
% %
% Read/Write X Windows System Window Dump Format %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/cache.h"
#include "magick/color-private.h"
#include "magick/colormap.h"
#include "magick/colormap-private.h"
#include "magick/colorspace.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/monitor-private.h"
#include "magick/property.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#if defined(MAGICKCORE_X11_DELEGATE)
#include "magick/xwindow-private.h"
#if !defined(vms)
#include <X11/XWDFile.h>
#else
#include "XWDFile.h"
#endif
#endif
/*
Forward declarations.
*/
#if defined(MAGICKCORE_X11_DELEGATE)
static MagickBooleanType
WriteXWDImage(const ImageInfo *,Image *);
#endif
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s X W D %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsXWD() returns MagickTrue if the image format type, identified by the
% magick string, is XWD.
%
% The format of the IsXWD method is:
%
% MagickBooleanType IsXWD(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: compare image format pattern against these bytes.
%
% o length: Specifies the length of the magick string.
%
*/
static MagickBooleanType IsXWD(const unsigned char *magick,const size_t length)
{
if (length < 8)
return(MagickFalse);
if (memcmp(magick+1,"\000\000",2) == 0)
{
if (memcmp(magick+4,"\007\000\000",3) == 0)
return(MagickTrue);
if (memcmp(magick+5,"\000\000\007",3) == 0)
return(MagickTrue);
}
return(MagickFalse);
}
#if defined(MAGICKCORE_X11_DELEGATE)
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d X W D I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadXWDImage() reads an X Window System window dump 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 ReadXWDImage method is:
%
% Image *ReadXWDImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadXWDImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
#define CheckOverflowException(length,width,height) \
(((height) != 0) && ((length)/((size_t) height) != ((size_t) width)))
char
*comment;
Image
*image;
IndexPacket
index;
int
x_status;
ssize_t
y;
MagickBooleanType
authentic_colormap;
MagickStatusType
status;
register IndexPacket
*indexes;
register ssize_t
x;
register PixelPacket
*q;
register ssize_t
i;
register size_t
pixel;
size_t
length;
ssize_t
count;
size_t
lsb_first;
XColor
*colors;
XImage
*ximage;
XWDFileHeader
header;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AcquireImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Read in header information.
*/
count=ReadBlob(image,sz_XWDheader,(unsigned char *) &header);
if (count == 0)
ThrowReaderException(CorruptImageError,"UnableToReadImageHeader");
image->columns=header.pixmap_width;
image->rows=header.pixmap_height;
image->depth=8;
/*
Ensure the header byte-order is most-significant byte first.
*/
lsb_first=1;
if ((int) (*(char *) &lsb_first) != 0)
MSBOrderLong((unsigned char *) &header,sz_XWDheader);
/*
Check to see if the dump file is in the proper format.
*/
if (header.file_version != XWD_FILE_VERSION)
ThrowReaderException(CorruptImageError,"FileFormatVersionMismatch");
if (header.header_size < sz_XWDheader)
ThrowReaderException(CorruptImageError,"CorruptImage");
length=(size_t) header.header_size-sz_XWDheader;
comment=(char *) AcquireQuantumMemory(length+1,sizeof(*comment));
if (comment == (char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
count=ReadBlob(image,length,(unsigned char *) comment);
comment[length]='\0';
(void) SetImageProperty(image,"comment",comment);
comment=DestroyString(comment);
if (count != (ssize_t) length)
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
/*
Initialize the X image.
*/
ximage=(XImage *) AcquireMagickMemory(sizeof(*ximage));
if (ximage == (XImage *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
ximage->depth=(int) header.pixmap_depth;
ximage->format=(int) header.pixmap_format;
ximage->xoffset=(int) header.xoffset;
ximage->data=(char *) NULL;
ximage->width=(int) header.pixmap_width;
ximage->height=(int) header.pixmap_height;
ximage->bitmap_pad=(int) header.bitmap_pad;
ximage->bytes_per_line=(int) header.bytes_per_line;
ximage->byte_order=(int) header.byte_order;
ximage->bitmap_unit=(int) header.bitmap_unit;
ximage->bitmap_bit_order=(int) header.bitmap_bit_order;
ximage->bits_per_pixel=(int) header.bits_per_pixel;
ximage->red_mask=header.red_mask;
ximage->green_mask=header.green_mask;
ximage->blue_mask=header.blue_mask;
if ((ximage->depth < 0) || (ximage->width < 0) || (ximage->height < 0) ||
(ximage->bitmap_pad < 0) || (ximage->bytes_per_line < 0))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
if ((ximage->bits_per_pixel > 32) || (ximage->bitmap_unit > 32))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
x_status=XInitImage(ximage);
if (x_status == 0)
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
/*
Read colormap.
*/
authentic_colormap=MagickFalse;
colors=(XColor *) NULL;
if (header.ncolors != 0)
{
XWDColor
color;
length=(size_t) header.ncolors;
colors=(XColor *) AcquireQuantumMemory(length,sizeof(*colors));
if (colors == (XColor *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
for (i=0; i < (ssize_t) header.ncolors; i++)
{
count=ReadBlob(image,sz_XWDColor,(unsigned char *) &color);
if (count == 0)
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
colors[i].pixel=color.pixel;
colors[i].red=color.red;
colors[i].green=color.green;
colors[i].blue=color.blue;
colors[i].flags=(char) color.flags;
if (color.flags != 0)
authentic_colormap=MagickTrue;
}
/*
Ensure the header byte-order is most-significant byte first.
*/
lsb_first=1;
if ((int) (*(char *) &lsb_first) != 0)
for (i=0; i < (ssize_t) header.ncolors; i++)
{
MSBOrderLong((unsigned char *) &colors[i].pixel,
sizeof(colors[i].pixel));
MSBOrderShort((unsigned char *) &colors[i].red,3*
sizeof(colors[i].red));
}
}
/*
Allocate the pixel buffer.
*/
length=(size_t) ximage->bytes_per_line*ximage->height;
if (CheckOverflowException(length,ximage->bytes_per_line,ximage->height))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
if (ximage->format != ZPixmap)
{
size_t
extent;
extent=length;
length*=ximage->depth;
if (CheckOverflowException(length,extent,ximage->depth))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
}
ximage->data=(char *) AcquireQuantumMemory(length,sizeof(*ximage->data));
if (ximage->data == (char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
count=ReadBlob(image,length,(unsigned char *) ximage->data);
if (count == 0)
ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
/*
Convert image to MIFF format.
*/
image->columns=(size_t) ximage->width;
image->rows=(size_t) ximage->height;
if ((colors == (XColor *) NULL) || (ximage->red_mask != 0) ||
(ximage->green_mask != 0) || (ximage->blue_mask != 0))
image->storage_class=DirectClass;
else
image->storage_class=PseudoClass;
image->colors=header.ncolors;
if (image_info->ping == MagickFalse)
switch (image->storage_class)
{
case DirectClass:
default:
{
register size_t
color;
size_t
blue_mask,
blue_shift,
green_mask,
green_shift,
red_mask,
red_shift;
/*
Determine shift and mask for red, green, and blue.
*/
red_mask=ximage->red_mask;
red_shift=0;
while ((red_mask != 0) && ((red_mask & 0x01) == 0))
{
red_mask>>=1;
red_shift++;
}
green_mask=ximage->green_mask;
green_shift=0;
while ((green_mask != 0) && ((green_mask & 0x01) == 0))
{
green_mask>>=1;
green_shift++;
}
blue_mask=ximage->blue_mask;
blue_shift=0;
while ((blue_mask != 0) && ((blue_mask & 0x01) == 0))
{
blue_mask>>=1;
blue_shift++;
}
/*
Convert X image to DirectClass packets.
*/
if ((image->colors != 0) && (authentic_colormap != MagickFalse))
for (y=0; y < (ssize_t) image->rows; y++)
{
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (ssize_t) image->columns; x++)
{
pixel=XGetPixel(ximage,(int) x,(int) y);
index=(IndexPacket) ((pixel >> red_shift) & red_mask);
q->red=ScaleShortToQuantum(colors[(ssize_t) index].red);
index=(IndexPacket) ((pixel >> green_shift) & green_mask);
q->green=ScaleShortToQuantum(colors[(ssize_t) index].green);
index=(IndexPacket) ((pixel >> blue_shift) & blue_mask);
q->blue=ScaleShortToQuantum(colors[(ssize_t) index].blue);
q++;
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
else
for (y=0; y < (ssize_t) image->rows; y++)
{
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (ssize_t) image->columns; x++)
{
pixel=XGetPixel(ximage,(int) x,(int) y);
color=(pixel >> red_shift) & red_mask;
color=(color*65535UL)/red_mask;
q->red=ScaleShortToQuantum((unsigned short) color);
color=(pixel >> green_shift) & green_mask;
color=(color*65535UL)/green_mask;
q->green=ScaleShortToQuantum((unsigned short) color);
color=(pixel >> blue_shift) & blue_mask;
color=(color*65535UL)/blue_mask;
q->blue=ScaleShortToQuantum((unsigned short) color);
q++;
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
break;
}
case PseudoClass:
{
/*
Convert X image to PseudoClass packets.
*/
if (AcquireImageColormap(image,image->colors) == MagickFalse)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
for (i=0; i < (ssize_t) image->colors; i++)
{
image->colormap[i].red=ScaleShortToQuantum(colors[i].red);
image->colormap[i].green=ScaleShortToQuantum(colors[i].green);
image->colormap[i].blue=ScaleShortToQuantum(colors[i].blue);
}
for (y=0; y < (ssize_t) image->rows; y++)
{
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,XGetPixel(ximage,(int) x,
(int) y));
indexes[x]=index;
*q++=image->colormap[(ssize_t) index];
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
break;
}
}
/*
Free image and colormap.
*/
if (header.ncolors != 0)
colors=(XColor *) RelinquishMagickMemory(colors);
ximage->data=DestroyString(ximage->data);
ximage=(XImage *) RelinquishMagickMemory(ximage);
if (EOFBlob(image) != MagickFalse)
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
(void) CloseBlob(image);
return(GetFirstImageInList(image));
}
#endif
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r X W D I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterXWDImage() adds properties for the XWD image format to
% the list of supported formats. The properties 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 RegisterXWDImage method is:
%
% size_t RegisterXWDImage(void)
%
*/
ModuleExport size_t RegisterXWDImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("XWD");
#if defined(MAGICKCORE_X11_DELEGATE)
entry->decoder=(DecodeImageHandler *) ReadXWDImage;
entry->encoder=(EncodeImageHandler *) WriteXWDImage;
#endif
entry->magick=(IsImageFormatHandler *) IsXWD;
entry->adjoin=MagickFalse;
entry->description=ConstantString("X Windows system window dump (color)");
entry->module=ConstantString("XWD");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r X W D I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterXWDImage() removes format registrations made by the
% XWD module from the list of supported formats.
%
% The format of the UnregisterXWDImage method is:
%
% UnregisterXWDImage(void)
%
*/
ModuleExport void UnregisterXWDImage(void)
{
(void) UnregisterMagickInfo("XWD");
}
#if defined(MAGICKCORE_X11_DELEGATE)
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e X W D I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteXWDImage() writes an image to a file in X window dump
% rasterfile format.
%
% The format of the WriteXWDImage method is:
%
% MagickBooleanType WriteXWDImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o image_info: the image info.
%
% o image: The image.
%
*/
static MagickBooleanType WriteXWDImage(const ImageInfo *image_info,Image *image)
{
const char
*value;
ssize_t
y;
MagickBooleanType
status;
register const IndexPacket
*indexes;
register const PixelPacket
*p;
register ssize_t
x;
register ssize_t
i;
register unsigned char
*q;
size_t
length;
unsigned char
*pixels;
size_t
bits_per_pixel,
bytes_per_line,
lsb_first,
scanline_pad;
XWDFileHeader
xwd_info;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == MagickFalse)
return(status);
if (image->colorspace != RGBColorspace)
(void) TransformImageColorspace(image,RGBColorspace);
/*
Initialize XWD file header.
*/
(void) ResetMagickMemory(&xwd_info,0,sizeof(xwd_info));
xwd_info.header_size=(CARD32) sz_XWDheader;
value=GetImageProperty(image,"comment");
if (value != (const char *) NULL)
xwd_info.header_size+=(CARD32) strlen(value);
xwd_info.header_size++;
xwd_info.file_version=(CARD32) XWD_FILE_VERSION;
xwd_info.pixmap_format=(CARD32) ZPixmap;
xwd_info.pixmap_depth=(CARD32) (image->storage_class == DirectClass ? 24 : 8);
xwd_info.pixmap_width=(CARD32) image->columns;
xwd_info.pixmap_height=(CARD32) image->rows;
xwd_info.xoffset=(CARD32) 0;
xwd_info.byte_order=(CARD32) MSBFirst;
xwd_info.bitmap_unit=(CARD32) (image->storage_class == DirectClass ? 32 : 8);
xwd_info.bitmap_bit_order=(CARD32) MSBFirst;
xwd_info.bitmap_pad=(CARD32) (image->storage_class == DirectClass ? 32 : 8);
bits_per_pixel=(size_t) (image->storage_class == DirectClass ? 24 : 8);
xwd_info.bits_per_pixel=(CARD32) bits_per_pixel;
bytes_per_line=(CARD32) ((((xwd_info.bits_per_pixel*
xwd_info.pixmap_width)+((xwd_info.bitmap_pad)-1))/
(xwd_info.bitmap_pad))*((xwd_info.bitmap_pad) >> 3));
xwd_info.bytes_per_line=(CARD32) bytes_per_line;
xwd_info.visual_class=(CARD32)
(image->storage_class == DirectClass ? DirectColor : PseudoColor);
xwd_info.red_mask=(CARD32)
(image->storage_class == DirectClass ? 0xff0000 : 0);
xwd_info.green_mask=(CARD32)
(image->storage_class == DirectClass ? 0xff00 : 0);
xwd_info.blue_mask=(CARD32) (image->storage_class == DirectClass ? 0xff : 0);
xwd_info.bits_per_rgb=(CARD32) (image->storage_class == DirectClass ? 24 : 8);
xwd_info.colormap_entries=(CARD32)
(image->storage_class == DirectClass ? 256 : image->colors);
xwd_info.ncolors=(unsigned int)
(image->storage_class == DirectClass ? 0 : image->colors);
xwd_info.window_width=(CARD32) image->columns;
xwd_info.window_height=(CARD32) image->rows;
xwd_info.window_x=0;
xwd_info.window_y=0;
xwd_info.window_bdrwidth=(CARD32) 0;
/*
Write XWD header.
*/
lsb_first=1;
if ((int) (*(char *) &lsb_first) != 0)
MSBOrderLong((unsigned char *) &xwd_info,sizeof(xwd_info));
(void) WriteBlob(image,sz_XWDheader,(unsigned char *) &xwd_info);
if (value != (const char *) NULL)
(void) WriteBlob(image,strlen(value),(unsigned char *) value);
(void) WriteBlob(image,1,(const unsigned char *) "\0");
if (image->storage_class == PseudoClass)
{
XColor
*colors;
XWDColor
color;
/*
Dump colormap to file.
*/
(void) ResetMagickMemory(&color,0,sizeof(color));
colors=(XColor *) AcquireQuantumMemory((size_t) image->colors,
sizeof(*colors));
if (colors == (XColor *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
for (i=0; i < (ssize_t) image->colors; i++)
{
colors[i].pixel=(size_t) i;
colors[i].red=ScaleQuantumToShort(image->colormap[i].red);
colors[i].green=ScaleQuantumToShort(image->colormap[i].green);
colors[i].blue=ScaleQuantumToShort(image->colormap[i].blue);
colors[i].flags=(char) (DoRed | DoGreen | DoBlue);
colors[i].pad='\0';
if ((int) (*(char *) &lsb_first) != 0)
{
MSBOrderLong((unsigned char *) &colors[i].pixel,
sizeof(colors[i].pixel));
MSBOrderShort((unsigned char *) &colors[i].red,
3*sizeof(colors[i].red));
}
}
for (i=0; i < (ssize_t) image->colors; i++)
{
color.pixel=(CARD32) colors[i].pixel;
color.red=colors[i].red;
color.green=colors[i].green;
color.blue=colors[i].blue;
color.flags=(CARD8) colors[i].flags;
(void) WriteBlob(image,sz_XWDColor,(unsigned char *) &color);
}
colors=(XColor *) RelinquishMagickMemory(colors);
}
/*
Allocate memory for pixels.
*/
length=3*bytes_per_line;
if (image->storage_class == PseudoClass)
length=bytes_per_line;
pixels=(unsigned char *) AcquireQuantumMemory(length,sizeof(*pixels));
if (pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
(void) ResetMagickMemory(pixels,0,length);
/*
Convert MIFF to XWD raster pixels.
*/
scanline_pad=(bytes_per_line-((image->columns*bits_per_pixel) >> 3));
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;
if (image->storage_class == PseudoClass)
{
indexes=GetVirtualIndexQueue(image);
for (x=0; x < (ssize_t) image->columns; x++)
*q++=(unsigned char) indexes[x];
}
else
for (x=0; x < (ssize_t) image->columns; x++)
{
*q++=ScaleQuantumToChar(GetRedPixelComponent(p));
*q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
*q++=ScaleQuantumToChar(GetBluePixelComponent(p));
p++;
}
for (x=0; x < (ssize_t) scanline_pad; x++)
*q++='\0';
(void) WriteBlob(image,(size_t) (q-pixels),pixels);
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
(void) CloseBlob(image);
return(MagickTrue);
}
#endif