/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- FindColor
- MagickMax
- MagickMin
- ReadPALMImage
- RegisterPALMImage
- UnregisterPALMImage
- WritePALMImage
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% PPPP AAA L M M %
% P P A A L MM MM %
% PPPP AAAAA L M M M %
% P A A L M M %
% P A A LLLLL M M %
% %
% %
% Read/Write Palm Pixmap. %
% %
% %
% Software Design %
% Christopher R. Hawks %
% December 2001 %
% %
% Copyright 1999-2004 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. %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Based on pnmtopalm by Bill Janssen and ppmtobmp by Ian Goldberg.
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/cache.h"
#include "magick/color.h"
#include "magick/colormap.h"
#include "magick/colormap-private.h"
#include "magick/color-private.h"
#include "magick/colorspace.h"
#include "magick/constitute.h"
#include "magick/exception.h"
#include "magick/histogram.h"
#include "magick/image.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/monitor-private.h"
#include "magick/paint.h"
#include "magick/pixel-private.h"
#include "magick/property.h"
#include "magick/quantize.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#include "magick/utility.h"
/*
Define declarations.
*/
#define PALM_IS_COMPRESSED_FLAG 0x8000
#define PALM_HAS_COLORMAP_FLAG 0x4000
#define PALM_HAS_FOUR_BYTE_FIELD 0x0200
#define PALM_HAS_TRANSPARENCY_FLAG 0x2000
#define PALM_IS_INDIRECT 0x1000
#define PALM_IS_FOR_SCREEN 0x0800
#define PALM_IS_DIRECT_COLOR 0x0400
#define PALM_COMPRESSION_SCANLINE 0x00
#define PALM_COMPRESSION_RLE 0x01
#define PALM_COMPRESSION_NONE 0xFF
/*
The 256 color system palette for Palm Computing Devices.
*/
static unsigned char
PalmPalette[256][3] =
{
{255, 255,255}, {255, 204,255}, {255, 153,255}, {255, 102,255},
{255, 51,255}, {255, 0,255}, {255, 255,204}, {255, 204,204},
{255, 153,204}, {255, 102,204}, {255, 51,204}, {255, 0,204},
{255, 255,153}, {255, 204,153}, {255, 153,153}, {255, 102,153},
{255, 51,153}, {255, 0,153}, {204, 255,255}, {204, 204,255},
{204, 153,255}, {204, 102,255}, {204, 51,255}, {204, 0,255},
{204, 255,204}, {204, 204,204}, {204, 153,204}, {204, 102,204},
{204, 51,204}, {204, 0,204}, {204, 255,153}, {204, 204,153},
{204, 153,153}, {204, 102,153}, {204, 51,153}, {204, 0,153},
{153, 255,255}, {153, 204,255}, {153, 153,255}, {153, 102,255},
{153, 51,255}, {153, 0,255}, {153, 255,204}, {153, 204,204},
{153, 153,204}, {153, 102,204}, {153, 51,204}, {153, 0,204},
{153, 255,153}, {153, 204,153}, {153, 153,153}, {153, 102,153},
{153, 51,153}, {153, 0,153}, {102, 255,255}, {102, 204,255},
{102, 153,255}, {102, 102,255}, {102, 51,255}, {102, 0,255},
{102, 255,204}, {102, 204,204}, {102, 153,204}, {102, 102,204},
{102, 51,204}, {102, 0,204}, {102, 255,153}, {102, 204,153},
{102, 153,153}, {102, 102,153}, {102, 51,153}, {102, 0,153},
{ 51, 255,255}, { 51, 204,255}, { 51, 153,255}, { 51, 102,255},
{ 51, 51,255}, { 51, 0,255}, { 51, 255,204}, { 51, 204,204},
{ 51, 153,204}, { 51, 102,204}, { 51, 51,204}, { 51, 0,204},
{ 51, 255,153}, { 51, 204,153}, { 51, 153,153}, { 51, 102,153},
{ 51, 51,153}, { 51, 0,153}, { 0, 255,255}, { 0, 204,255},
{ 0, 153,255}, { 0, 102,255}, { 0, 51,255}, { 0, 0,255},
{ 0, 255,204}, { 0, 204,204}, { 0, 153,204}, { 0, 102,204},
{ 0, 51,204}, { 0, 0,204}, { 0, 255,153}, { 0, 204,153},
{ 0, 153,153}, { 0, 102,153}, { 0, 51,153}, { 0, 0,153},
{255, 255,102}, {255, 204,102}, {255, 153,102}, {255, 102,102},
{255, 51,102}, {255, 0,102}, {255, 255, 51}, {255, 204, 51},
{255, 153, 51}, {255, 102, 51}, {255, 51, 51}, {255, 0, 51},
{255, 255, 0}, {255, 204, 0}, {255, 153, 0}, {255, 102, 0},
{255, 51, 0}, {255, 0, 0}, {204, 255,102}, {204, 204,102},
{204, 153,102}, {204, 102,102}, {204, 51,102}, {204, 0,102},
{204, 255, 51}, {204, 204, 51}, {204, 153, 51}, {204, 102, 51},
{204, 51, 51}, {204, 0, 51}, {204, 255, 0}, {204, 204, 0},
{204, 153, 0}, {204, 102, 0}, {204, 51, 0}, {204, 0, 0},
{153, 255,102}, {153, 204,102}, {153, 153,102}, {153, 102,102},
{153, 51,102}, {153, 0,102}, {153, 255, 51}, {153, 204, 51},
{153, 153, 51}, {153, 102, 51}, {153, 51, 51}, {153, 0, 51},
{153, 255, 0}, {153, 204, 0}, {153, 153, 0}, {153, 102, 0},
{153, 51, 0}, {153, 0, 0}, {102, 255,102}, {102, 204,102},
{102, 153,102}, {102, 102,102}, {102, 51,102}, {102, 0,102},
{102, 255, 51}, {102, 204, 51}, {102, 153, 51}, {102, 102, 51},
{102, 51, 51}, {102, 0, 51}, {102, 255, 0}, {102, 204, 0},
{102, 153, 0}, {102, 102, 0}, {102, 51, 0}, {102, 0, 0},
{ 51, 255,102}, { 51, 204,102}, { 51, 153,102}, { 51, 102,102},
{ 51, 51,102}, { 51, 0,102}, { 51, 255, 51}, { 51, 204, 51},
{ 51, 153, 51}, { 51, 102, 51}, { 51, 51, 51}, { 51, 0, 51},
{ 51, 255, 0}, { 51, 204, 0}, { 51, 153, 0}, { 51, 102, 0},
{ 51, 51, 0}, { 51, 0, 0}, { 0, 255,102}, { 0, 204,102},
{ 0, 153,102}, { 0, 102,102}, { 0, 51,102}, { 0, 0,102},
{ 0, 255, 51}, { 0, 204, 51}, { 0, 153, 51}, { 0, 102, 51},
{ 0, 51, 51}, { 0, 0, 51}, { 0, 255, 0}, { 0, 204, 0},
{ 0, 153, 0}, { 0, 102, 0}, { 0, 51, 0}, { 17, 17, 17},
{ 34, 34, 34}, { 68, 68, 68}, { 85, 85, 85}, {119, 119,119},
{136, 136,136}, {170, 170,170}, {187, 187,187}, {221, 221,221},
{238, 238,238}, {192, 192,192}, {128, 0, 0}, {128, 0,128},
{ 0, 128, 0}, { 0, 128,128}, { 0, 0, 0}, { 0, 0, 0},
{ 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
{ 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
{ 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
{ 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
{ 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0},
{ 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}, { 0, 0, 0}
};
/*
Forward declarations.
*/
static MagickBooleanType
WritePALMImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% F i n d C o l o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% FindColor() returns the index of the matching entry from PalmPalette for a
% given PixelPacket.
%
% The format of the FindColor method is:
%
% int FindColor(PixelPacket *pixel)
%
% A description of each parameter follows:
%
% o int: the index of the matching color or -1 if not found/
%
% o pixel: a pointer to the PixelPacket to be matched.
%
*/
static int FindColor(PixelPacket *pixel)
{
register ssize_t
i;
for (i=0; i < 256; i++)
if (ScaleQuantumToChar(pixel->red) == PalmPalette[i][0] &&
ScaleQuantumToChar(pixel->green) == PalmPalette[i][1] &&
ScaleQuantumToChar(pixel->blue) == PalmPalette[i][2])
return(i);
return(-1);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d P A L M I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadPALMImage() reads an image of raw bites in LSB order 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 ReadPALMImage method is:
%
% Image *ReadPALMImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: Specifies a pointer to an ImageInfo structure.
%
% o exception: return any errors or warnings in this structure.
%
*/
static inline size_t MagickMax(const size_t x,const size_t y)
{
if (x > y)
return(x);
return(y);
}
static inline ssize_t MagickMin(const ssize_t x,const ssize_t y)
{
if (x < y)
return(x);
return(y);
}
static Image *ReadPALMImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
Image
*image;
IndexPacket
index;
ssize_t
y;
MagickBooleanType
status;
MagickOffsetType
totalOffset,
seekNextDepth;
MagickPixelPacket
transpix;
register IndexPacket
*indexes;
register ssize_t
i,
x;
register PixelPacket
*q;
ssize_t
count;
unsigned char
*lastrow,
*one_row,
*ptr;
size_t
bytes_per_row,
flags,
bits_per_pixel,
version,
nextDepthOffset,
transparentIndex,
compressionType,
byte,
mask,
redbits,
greenbits,
bluebits,
one,
pad,
size,
bit;
unsigned short
color16;
/*
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)
{
(void) DestroyImageList(image);
return((Image *) NULL);
}
totalOffset=0;
do
{
image->columns=ReadBlobMSBShort(image);
image->rows=ReadBlobMSBShort(image);
if (EOFBlob(image) != MagickFalse)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
/*
Copied from coders/pnm.c. TODO other checks ...
*/
if ((image->columns == 0) || (image->rows == 0))
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
bytes_per_row=ReadBlobMSBShort(image);
flags=ReadBlobMSBShort(image);
bits_per_pixel=(size_t) ReadBlobByte(image);
if (bits_per_pixel > 16)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
version=(size_t) ReadBlobByte(image);
(void) version;
nextDepthOffset=(size_t) ReadBlobMSBShort(image);
transparentIndex=(size_t) ReadBlobByte(image);
compressionType=(size_t) ReadBlobByte(image);
pad=ReadBlobMSBShort(image);
(void) pad;
/*
Initialize image colormap.
*/
one=1;
if ((bits_per_pixel < 16) &&
(AcquireImageColormap(image,one << bits_per_pixel) == MagickFalse))
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
GetMagickPixelPacket(image,&transpix);
if (bits_per_pixel == 16) /* Direct Color */
{
redbits=(size_t) ReadBlobByte(image); /* # of bits of red */
(void) redbits;
greenbits=(size_t) ReadBlobByte(image); /* # of bits of green */
(void) greenbits;
bluebits=(size_t) ReadBlobByte(image); /* # of bits of blue */
(void) bluebits;
ReadBlobByte(image); /* reserved by Palm */
ReadBlobByte(image); /* reserved by Palm */
transpix.red=(MagickRealType) (QuantumRange*ReadBlobByte(image)/31);
transpix.green=(MagickRealType) (QuantumRange*ReadBlobByte(image)/63);
transpix.blue=(MagickRealType) (QuantumRange*ReadBlobByte(image)/31);
}
if (bits_per_pixel == 8)
{
IndexPacket
index;
if (flags & PALM_HAS_COLORMAP_FLAG)
{
count=(ssize_t) ReadBlobMSBShort(image);
for (i=0; i < (ssize_t) count; i++)
{
ReadBlobByte(image);
index=ConstrainColormapIndex(image,255-i);
image->colormap[(int) index].red=
ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
image->colormap[(int) index].green=
ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
image->colormap[(int) index].blue=
ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
}
}
else
{
for (i=0; i < (ssize_t) (1L << bits_per_pixel); i++)
{
index=ConstrainColormapIndex(image,255-i);
image->colormap[(int) index].red=
ScaleCharToQuantum(PalmPalette[i][0]);
image->colormap[(int) index].green=
ScaleCharToQuantum(PalmPalette[i][1]);
image->colormap[(int) index].blue=
ScaleCharToQuantum(PalmPalette[i][2]);
}
}
}
if (flags & PALM_IS_COMPRESSED_FLAG)
size=ReadBlobMSBShort(image);
(void) size;
image->storage_class=DirectClass;
if (bits_per_pixel < 16)
{
image->storage_class=PseudoClass;
image->depth=8;
}
one_row=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
sizeof(*one_row));
if (one_row == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
lastrow=(unsigned char *) NULL;
if (compressionType == PALM_COMPRESSION_SCANLINE) {
lastrow=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
sizeof(*lastrow));
if (lastrow == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
}
mask=(1l << bits_per_pixel)-1;
for (y = 0; y < (ssize_t) image->rows; y++)
{
if ((flags & PALM_IS_COMPRESSED_FLAG) == 0)
{
/* TODO move out of loop! */
image->compression=NoCompression;
count=ReadBlob(image,bytes_per_row,one_row);
}
else
{
if (compressionType == PALM_COMPRESSION_RLE)
{
/* TODO move out of loop! */
image->compression=RLECompression;
for (i=0; i < (ssize_t) bytes_per_row; )
{
count=(ssize_t) ReadBlobByte(image);
count=MagickMin(count,(ssize_t) bytes_per_row-i);
byte=(size_t) ReadBlobByte(image);
(void) ResetMagickMemory(one_row+i,(int) byte,(size_t) count);
i+=count;
}
}
else
if (compressionType == PALM_COMPRESSION_SCANLINE)
{
size_t
one;
/* TODO move out of loop! */
one=1;
image->compression=FaxCompression;
for (i=0; i < (ssize_t) bytes_per_row; i+=8)
{
count=(ssize_t) ReadBlobByte(image);
byte=1UL*MagickMin((ssize_t) bytes_per_row-i,8);
for (bit=0; bit < byte; bit++)
{
if ((y == 0) || (count & (one << (7 - bit))))
one_row[i+bit]=(unsigned char) ReadBlobByte(image);
else
one_row[i+bit]=lastrow[i+bit];
}
}
(void) CopyMagickMemory(lastrow, one_row, bytes_per_row);
}
}
ptr=one_row;
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
indexes=GetAuthenticIndexQueue(image);
if (bits_per_pixel == 16)
{
if (image->columns > (2*bytes_per_row))
ThrowReaderException(CorruptImageError,"CorruptImage");
for (x=0; x < (ssize_t) image->columns; x++)
{
color16=(*ptr++ << 8);
color16|=(*ptr++);
q->red=(Quantum) ((QuantumRange*((color16 >> 11) & 0x1f))/0x1f);
q->green=(Quantum) ((QuantumRange*((color16 >> 5) & 0x3f))/0x3f);
q->blue=(Quantum) ((QuantumRange*((color16 >> 0) & 0x1f))/0x1f);
SetOpacityPixelComponent(q,OpaqueOpacity);
q++;
}
}
else
{
bit=8-bits_per_pixel;
for (x=0; x < (ssize_t) image->columns; x++)
{
if ((size_t) (ptr-one_row) >= bytes_per_row)
ThrowReaderException(CorruptImageError,"CorruptImage");
index=(IndexPacket) (mask-(((*ptr) & (mask << bit)) >> bit));
indexes[x]=index;
*q++=image->colormap[(ssize_t) index];
if (bit)
bit-=bits_per_pixel;
else
{
ptr++;
bit=8-bits_per_pixel;
}
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
}
if (image->previous == (Image *) NULL)
{
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
}
if (flags & PALM_HAS_TRANSPARENCY_FLAG)
{
if (bits_per_pixel != 16)
SetMagickPixelPacket(image,image->colormap+(mask-transparentIndex),
(const IndexPacket *) NULL,&transpix);
(void) TransparentPaintImage(image,&transpix,(Quantum)
TransparentOpacity,MagickFalse);
}
one_row=(unsigned char *) RelinquishMagickMemory(one_row);
if (compressionType == PALM_COMPRESSION_SCANLINE)
lastrow=(unsigned char *) RelinquishMagickMemory(lastrow);
/*
Proceed to next image. Copied from coders/pnm.c
*/
if (image_info->number_scenes != 0)
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
break;
if (nextDepthOffset != 0)
{
/*
Skip to next image.
*/
totalOffset+=(MagickOffsetType) (nextDepthOffset*4);
if (totalOffset >= (MagickOffsetType) GetBlobSize(image))
{
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
}
else
{
seekNextDepth=SeekBlob(image,totalOffset,SEEK_SET);
}
if (seekNextDepth != totalOffset)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
/*
Allocate next image structure. Copied from coders/pnm.c
*/
AcquireNextImage(image_info,image);
if (GetNextImageInList(image) == (Image *) NULL)
{
(void) DestroyImageList(image);
return((Image *) NULL);
}
image=SyncNextImageInList(image);
status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
GetBlobSize(image));
if (status == MagickFalse)
break;
}
} while (nextDepthOffset != 0);
(void) CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r P A L M I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterPALMImage() adds properties for the PALM 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 RegisterPALMImage method is:
%
% size_t RegisterPALMImage(void)
%
*/
ModuleExport size_t RegisterPALMImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("PALM");
entry->decoder=(DecodeImageHandler *) ReadPALMImage;
entry->encoder=(EncodeImageHandler *) WritePALMImage;
entry->seekable_stream=MagickTrue;
entry->description=ConstantString("Palm pixmap");
entry->module=ConstantString("PALM");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r P A L M I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterPALMImage() removes format registrations made by the PALM
% module from the list of supported formats.
%
% The format of the UnregisterPALMImage method is:
%
% UnregisterPALMImage(void)
%
*/
ModuleExport void UnregisterPALMImage(void)
{
(void) UnregisterMagickInfo("PALM");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e P A L M I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WritePALMImage() writes an image of raw bits in LSB order to a file.
%
% The format of the WritePALMImage method is:
%
% MagickBooleanType WritePALMImage(const ImageInfo *image_info,
% Image *image)
%
% A description of each parameter follows.
%
% o image_info: Specifies a pointer to an ImageInfo structure.
%
% o image: A pointer to a Image structure.
%
*/
static MagickBooleanType WritePALMImage(const ImageInfo *image_info,
Image *image)
{
int
y;
ExceptionInfo
exception;
MagickBooleanType
status;
MagickOffsetType
currentOffset,
offset,
scene;
MagickSizeType
cc;
PixelPacket
transpix;
QuantizeInfo
*quantize_info;
register IndexPacket
*indexes;
register ssize_t
x;
register PixelPacket
*p;
unsigned char
bit,
byte,
color,
*lastrow,
*one_row,
*ptr,
version;
unsigned int
transparentIndex;
size_t
count,
bits_per_pixel,
bytes_per_row,
nextDepthOffset,
one;
unsigned short
color16,
flags;
/*
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,&exception);
if (status == MagickFalse)
return(status);
GetExceptionInfo(&exception);
quantize_info=AcquireQuantizeInfo(image_info);
flags=0;
currentOffset=0;
transparentIndex=0;
transpix.red=0;
transpix.green=0;
transpix.blue=0;
transpix.opacity=0;
one=1;
version=0;
scene=0;
do
{
if (image->colorspace != RGBColorspace)
(void) TransformImageColorspace(image,RGBColorspace);
count=GetNumberColors(image,NULL,&exception);
for (bits_per_pixel=1; (one << bits_per_pixel) < count; bits_per_pixel*=2) ;
if (image_info->depth > 100)
bits_per_pixel=image_info->depth-100;
if (bits_per_pixel < 16)
(void) TransformImageColorspace(image,image->colorspace);
if (bits_per_pixel < 8)
{
(void) TransformImageColorspace(image,GRAYColorspace);
(void) SetImageType(image,PaletteType);
(void) SortColormapByIntensity(image);
}
if ((image->storage_class == PseudoClass) && (image->colors > 256))
(void) SetImageStorageClass(image,DirectClass);
if (image->storage_class == PseudoClass)
flags|=PALM_HAS_COLORMAP_FLAG;
else
flags|=PALM_IS_DIRECT_COLOR;
(void) WriteBlobMSBShort(image,(unsigned short) image->columns); /* width */
(void) WriteBlobMSBShort(image,(unsigned short) image->rows); /* height */
bytes_per_row=((image->columns+(16/bits_per_pixel-1))/(16/
bits_per_pixel))*2;
(void) WriteBlobMSBShort(image,(unsigned short) bytes_per_row);
if ((image_info->compression == RLECompression) ||
(image_info->compression == FaxCompression))
flags|=PALM_IS_COMPRESSED_FLAG;
(void) WriteBlobMSBShort(image, flags);
(void) WriteBlobByte(image,(unsigned char) bits_per_pixel);
if (bits_per_pixel > 1)
version=1;
if ((image_info->compression == RLECompression) ||
(image_info->compression == FaxCompression))
version=2;
(void) WriteBlobByte(image,version);
(void) WriteBlobMSBShort(image,0); /* nextDepthOffset */
(void) WriteBlobByte(image,(unsigned char) transparentIndex);
if (image_info->compression == RLECompression)
(void) WriteBlobByte(image,PALM_COMPRESSION_RLE);
else
if (image_info->compression == FaxCompression)
(void) WriteBlobByte(image,PALM_COMPRESSION_SCANLINE);
else
(void) WriteBlobByte(image,PALM_COMPRESSION_NONE);
(void) WriteBlobMSBShort(image,0); /* reserved */
offset=16;
if (bits_per_pixel == 16)
{
(void) WriteBlobByte(image,5); /* # of bits of red */
(void) WriteBlobByte(image,6); /* # of bits of green */
(void) WriteBlobByte(image,5); /* # of bits of blue */
(void) WriteBlobByte(image,0); /* reserved by Palm */
(void) WriteBlobMSBLong(image,0); /* no transparent color, YET */
offset+=8;
}
if (bits_per_pixel == 8)
{
if (flags & PALM_HAS_COLORMAP_FLAG) /* Write out colormap */
{
quantize_info->dither=IsPaletteImage(image,&image->exception);
quantize_info->number_colors=image->colors;
(void) QuantizeImage(quantize_info,image);
(void) WriteBlobMSBShort(image,(unsigned short) image->colors);
for (count = 0; count < image->colors; count++)
{
(void) WriteBlobByte(image,(unsigned char) count);
(void) WriteBlobByte(image,ScaleQuantumToChar(
image->colormap[count].red));
(void) WriteBlobByte(image,
ScaleQuantumToChar(image->colormap[count].green));
(void) WriteBlobByte(image,
ScaleQuantumToChar(image->colormap[count].blue));
}
offset+=2+count*4;
}
else /* Map colors to Palm standard colormap */
{
Image
*affinity_image;
affinity_image=ConstituteImage(256,1,"RGB",CharPixel,&PalmPalette,
&exception);
(void) TransformImageColorspace(affinity_image,affinity_image->colorspace);
(void) RemapImage(quantize_info,image,affinity_image);
for (y=0; y < (ssize_t) image->rows; y++)
{
p=GetAuthenticPixels(image,0,y,image->columns,1,&exception);
indexes=GetAuthenticIndexQueue(image);
for (x=0; x < (ssize_t) image->columns; x++)
indexes[x]=(IndexPacket) FindColor(&image->colormap[(ssize_t)
indexes[x]]);
}
affinity_image=DestroyImage(affinity_image);
}
}
if (flags & PALM_IS_COMPRESSED_FLAG)
(void) WriteBlobMSBShort(image,0); /* fill in size later */
lastrow=(unsigned char *) NULL;
if (image_info->compression == FaxCompression)
lastrow=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
sizeof(*lastrow));
/* TODO check whether memory really was acquired? */
one_row=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
sizeof(*one_row));
if (one_row == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
for (y=0; y < (int) image->rows; y++)
{
ptr=one_row;
(void) ResetMagickMemory(ptr,0,bytes_per_row);
p=GetAuthenticPixels(image,0,y,image->columns,1,&exception);
if (p == (PixelPacket *) NULL)
break;
indexes=GetAuthenticIndexQueue(image);
if (bits_per_pixel == 16)
{
for (x=0; x < (int) image->columns; x++)
{
color16=(unsigned short) ((((31*(size_t) GetRedPixelComponent(p))/
(size_t) QuantumRange) << 11) |
(((63*(size_t) GetGreenPixelComponent(p))/(size_t) QuantumRange) << 5) |
((31*(size_t) GetBluePixelComponent(p))/(size_t) QuantumRange));
if (p->opacity == (Quantum) TransparentOpacity)
{
transpix.red=GetRedPixelComponent(p);
transpix.green=GetGreenPixelComponent(p);
transpix.blue=GetBluePixelComponent(p);
transpix.opacity=GetOpacityPixelComponent(p);
flags|=PALM_HAS_TRANSPARENCY_FLAG;
}
*ptr++=(unsigned char) ((color16 >> 8) & 0xff);
*ptr++=(unsigned char) (color16 & 0xff);
p++;
}
}
else
{
byte=0x00;
bit=(unsigned char) (8-bits_per_pixel);
for (x=0; x < (int) image->columns; x++)
{
if (bits_per_pixel >= 8)
color=(unsigned char) indexes[x];
else
color=(unsigned char) (indexes[x]*((one << bits_per_pixel)-1)/
MagickMax(1*image->colors-1,1));
byte|=color << bit;
if (bit != 0)
bit-=(unsigned char) bits_per_pixel;
else
{
*ptr++=byte;
byte=0x00;
bit=(unsigned char) (8-bits_per_pixel);
}
}
if ((image->columns % (8/bits_per_pixel)) != 0)
*ptr++=byte;
}
if (image_info->compression == RLECompression)
{
x=0;
while (x < (ssize_t) bytes_per_row)
{
byte=one_row[x];
count=1;
while ((one_row[++x] == byte) && (count < 255) &&
(x < (ssize_t) bytes_per_row))
count++;
(void) WriteBlobByte(image,(unsigned char) count);
(void) WriteBlobByte(image,(unsigned char) byte);
}
}
else
if (image_info->compression == FaxCompression)
{
char
tmpbuf[8],
*tptr;
for (x = 0; x < (ssize_t) bytes_per_row; x += 8)
{
tptr = tmpbuf;
for (bit=0, byte=0; bit < (unsigned char) MagickMin(8,(ssize_t) bytes_per_row-x); bit++)
{
if ((y == 0) || (lastrow[x + bit] != one_row[x + bit]))
{
byte |= (1 << (7 - bit));
*tptr++ = (char) one_row[x + bit];
}
}
(void) WriteBlobByte(image, byte);
(void) WriteBlob(image,tptr-tmpbuf,(unsigned char *) tmpbuf);
}
(void) CopyMagickMemory(lastrow,one_row,bytes_per_row);
}
else
(void) WriteBlob(image,bytes_per_row,one_row);
}
if (flags & PALM_HAS_TRANSPARENCY_FLAG)
{
offset=SeekBlob(image,currentOffset+6,SEEK_SET);
(void) WriteBlobMSBShort(image,flags);
offset=SeekBlob(image,currentOffset+12,SEEK_SET);
(void) WriteBlobByte(image,(unsigned char) transparentIndex); /* trans index */
}
if (bits_per_pixel == 16)
{
offset=SeekBlob(image,currentOffset+20,SEEK_SET);
(void) WriteBlobByte(image,0); /* reserved by Palm */
(void) WriteBlobByte(image,(unsigned char) ((31*transpix.red)/QuantumRange));
(void) WriteBlobByte(image,(unsigned char) ((63*transpix.green)/QuantumRange));
(void) WriteBlobByte(image,(unsigned char) ((31*transpix.blue)/QuantumRange));
}
if (flags & PALM_IS_COMPRESSED_FLAG) /* fill in size now */
{
offset=SeekBlob(image,currentOffset+offset,SEEK_SET);
(void) WriteBlobMSBShort(image,(unsigned short) (GetBlobSize(image)-
currentOffset-offset));
}
if (one_row != (unsigned char *) NULL)
one_row=(unsigned char *) RelinquishMagickMemory(one_row);
if (lastrow != (unsigned char *) NULL)
lastrow=(unsigned char *) RelinquishMagickMemory(lastrow);
if (GetNextImageInList(image) == (Image *) NULL)
break;
/* padding to 4 byte word */
for (cc = (GetBlobSize(image))%4; cc > 0; cc--)
{
(void) WriteBlobByte(image,0);
}
/* write nextDepthOffset and return to end of image */
offset=SeekBlob(image,currentOffset+10,SEEK_SET);
nextDepthOffset=(size_t) ((GetBlobSize(image)-currentOffset)/4);
(void) WriteBlobMSBShort(image,(unsigned short) nextDepthOffset);
currentOffset=(MagickOffsetType) GetBlobSize(image);
offset=SeekBlob(image,currentOffset,SEEK_SET);
image=SyncNextImageInList(image);
status=SetImageProgress(image,SaveImagesTag,scene++,
GetImageListLength(image));
if (status == MagickFalse)
break;
} while (image_info->adjoin != MagickFalse);
quantize_info=DestroyQuantizeInfo(quantize_info);
(void) CloseBlob(image);
(void) DestroyExceptionInfo(&exception);
return(MagickTrue);
}