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DEFINITIONS
This source file includes following definitions.
- ReadTGAImage
- RegisterTGAImage
- UnregisterTGAImage
- WriteTGAImage
/*
% Copyright (C) 2003 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
% Copyright 1991-1999 E. I. du Pont de Nemours and Company
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% TTTTT GGGG AAA %
% T G A A %
% T G GG AAAAA %
% T G G A A %
% T GGG A A %
% %
% %
% Read/Write Truevision Targa Image Format. %
% %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/analyze.h"
#include "magick/attribute.h"
#include "magick/blob.h"
#include "magick/colormap.h"
#include "magick/log.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/pixel_cache.h"
#include "magick/utility.h"
/*
Forward declarations.
*/
static unsigned int
WriteTGAImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d T G A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method ReadTGAImage reads a Truevision TGA 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 ReadTGAImage method is:
%
% Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadTGAImage returns a pointer to the image after
% reading. A null image is returned if there is a memory shortage or
% if the image cannot be read.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
#define TGAColormap 1 /* Colormapped image data */
#define TGARGB 2 /* Truecolor image data */
#define TGAMonochrome 3 /* Monochrome image data */
#define TGARLEColormap 9 /* Colormapped image data (encoded) */
#define TGARLERGB 10 /* Truecolor image data (encoded) */
#define TGARLEMonochrome 11 /* Monochrome image data (encoded) */
typedef struct _TGAInfo
{
unsigned char
id_length, /* Size of Image ID field */
colormap_type, /* Color map type */
image_type; /* Image type code */
unsigned short
colormap_index, /* Color map origin */
colormap_length; /* Color map length */
unsigned char
colormap_size; /* Color map entry depth */
unsigned short
x_origin, /* X origin of image */
y_origin, /* Y orgin of image */
width, /* Width of image */
height; /* Height of image */
unsigned char
bits_per_pixel, /* Image pixel size */
attributes; /* Image descriptor byte */
} TGAInfo;
Image
*image;
unsigned int
index;
long
y;
PixelPacket
pixel;
register IndexPacket
*indexes;
register long
i,
x;
register PixelPacket
*q;
size_t
count;
TGAInfo
tga_info;
unsigned char
runlength;
unsigned int
alpha_bits,
status;
unsigned long
base,
flag,
offset,
real,
skip;
unsigned int
is_grayscale=False;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == False)
ThrowReaderException(FileOpenError,UnableToOpenFile,image);
/*
Read TGA header information.
*/
(void) ReadBlob(image,1,(char *) &tga_info.id_length);
tga_info.colormap_type=ReadBlobByte(image);
tga_info.image_type=ReadBlobByte(image);
if (EOFBlob(image))
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
do
{
if (((tga_info.image_type != TGAColormap) &&
(tga_info.image_type != TGARGB) &&
(tga_info.image_type != TGAMonochrome) &&
(tga_info.image_type != TGARLEColormap) &&
(tga_info.image_type != TGARLERGB) &&
(tga_info.image_type != TGARLEMonochrome)) ||
(((tga_info.image_type == TGAColormap) ||
(tga_info.image_type == TGARLEColormap)) &&
(tga_info.colormap_type == 0)))
ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
tga_info.colormap_index=ReadBlobLSBShort(image);
tga_info.colormap_length=ReadBlobLSBShort(image);
tga_info.colormap_size=ReadBlobByte(image);
tga_info.x_origin=ReadBlobLSBShort(image);
tga_info.y_origin=ReadBlobLSBShort(image);
tga_info.width=ReadBlobLSBShort(image);
tga_info.height=ReadBlobLSBShort(image);
tga_info.bits_per_pixel=ReadBlobByte(image);
tga_info.attributes=ReadBlobByte(image);
if (EOFBlob(image))
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"ImageType=%s CMapType=%u CMapStart=%u CMapLength=%u CMapDepth=%u\n XOffset=%u YOffset=%u Width=%u Height=%u PixelDepth=%u Attributes=0x%.2x",
((tga_info.image_type == TGAColormap) ? "Colormapped" :
(tga_info.image_type == TGARGB) ? "TrueColor" :
(tga_info.image_type == TGAMonochrome) ? "Monochrome" :
(tga_info.image_type == TGARLEColormap) ? "Colormapped-RLE" :
(tga_info.image_type == TGARLERGB) ? "Truecolor-RLE" :
(tga_info.image_type == TGARLEMonochrome) ? "Monochrome-RLE" :
"Unknown"),
(unsigned int) tga_info.colormap_type, /* Colormap type */
(unsigned int) tga_info.colormap_index, /* Index of first colormap entry to use */
(unsigned int) tga_info.colormap_length, /* # of elements in colormap */
(unsigned int) tga_info.colormap_size, /* Bits in each palette entry */
tga_info.x_origin, tga_info.y_origin,
tga_info.width, tga_info.height,
(unsigned int) tga_info.bits_per_pixel,
tga_info.attributes);
/*
Validate depth.
*/
if (!(((tga_info.bits_per_pixel > 1) && (tga_info.bits_per_pixel < 17)) ||
(tga_info.bits_per_pixel == 24 ) ||
(tga_info.bits_per_pixel == 32 )))
ThrowReaderException(CoderError,DataStorageTypeIsNotSupported,image);
/*
Initialize image structure.
*/
alpha_bits=(tga_info.attributes & 0x0FU);
image->matte=(alpha_bits > 0);
image->columns=tga_info.width;
image->rows=tga_info.height;
if ((tga_info.image_type != TGAColormap) && (tga_info.image_type != TGARLEColormap))
{
/*
TrueColor Quantum Depth
*/
image->depth=((tga_info.bits_per_pixel <= 8) ? 8 :
(tga_info.bits_per_pixel <= 16) ? 5 :
(tga_info.bits_per_pixel == 24) ? 8 :
(tga_info.bits_per_pixel == 32) ? 8 : 8);
}
else
{
/*
ColorMapped Palette Entry Quantum Depth
*/
image->depth=((tga_info.colormap_size <= 8) ? 8 :
(tga_info.colormap_size <= 16) ? 5 :
(tga_info.colormap_size == 24) ? 8 :
(tga_info.colormap_size == 32) ? 8 : 8);
}
image->storage_class=DirectClass;
if ((tga_info.image_type == TGAColormap) ||
(tga_info.image_type == TGAMonochrome) ||
(tga_info.image_type == TGARLEColormap) ||
(tga_info.image_type == TGARLEMonochrome))
{
(void) LogMagickEvent(CoderEvent,GetMagickModule(),"Setting PseudoClass");
image->storage_class=PseudoClass;
}
if ((tga_info.image_type == TGARLEColormap) ||
(tga_info.image_type == TGARLEMonochrome))
image->compression=RLECompression;
is_grayscale=((tga_info.image_type == TGAMonochrome) ||
(tga_info.image_type == TGARLEMonochrome));
if (image->storage_class == PseudoClass)
{
if (tga_info.colormap_type != 0)
{
image->colors=tga_info.colormap_length;
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Using existing colormap with %u colors.",image->colors);
}
else
{
/*
Apply grayscale colormap.
*/
image->colors=(0x01U << tga_info.bits_per_pixel);
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Applying grayscale colormap with %u colors.",image->colors);
if (!AllocateImageColormap(image,image->colors))
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,
image);
}
}
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"StorageClass=%s Matte=%s Depth=%u Grayscale=%s",
((image->storage_class == DirectClass) ? "DirectClass" : "PseduoClass"),
MagickBoolToString(image->matte), image->depth,
MagickBoolToString(is_grayscale));
if (tga_info.id_length != 0)
{
char
*comment;
/*
TGA image comment.
*/
comment=MagickAllocateMemory(char *,(size_t) tga_info.id_length+1);
if (comment == (char *) NULL)
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,
image);
if(ReadBlob(image,tga_info.id_length,comment) != tga_info.id_length)
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
comment[tga_info.id_length]='\0';
(void) SetImageAttribute(image,"comment",comment);
MagickFreeMemory(comment);
}
(void) memset(&pixel,0,sizeof(PixelPacket));
pixel.opacity=TransparentOpacity;
if (tga_info.colormap_type != 0)
{
/*
Read TGA raster colormap.
*/
if (!AllocateImageColormap(image,image->colors))
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,
image);
for (i=0; i < (long) image->colors; i++)
{
switch (tga_info.colormap_size)
{
case 8:
default:
{
/*
Gray scale.
*/
pixel.red=ScaleCharToQuantum(ReadBlobByte(image));
pixel.green=pixel.red;
pixel.blue=pixel.red;
break;
}
case 15:
case 16:
{
/*
5 bits each of red green and blue.
*/
unsigned int
packet;
packet = ReadBlobByte(image);
packet |= (((unsigned int) ReadBlobByte(image)) << 8);
pixel.red=(packet >> 10) & 0x1f;
pixel.red=ScaleCharToQuantum(ScaleColor5to8(pixel.red));
pixel.green=(packet >> 5) & 0x1f;
pixel.green=ScaleCharToQuantum(ScaleColor5to8(pixel.green));
pixel.blue=packet & 0x1f;
pixel.blue=ScaleCharToQuantum(ScaleColor5to8(pixel.blue));
break;
}
case 24:
case 32:
{
/*
8 bits each of blue, green and red.
*/
pixel.blue=ScaleCharToQuantum(ReadBlobByte(image));
pixel.green=ScaleCharToQuantum(ReadBlobByte(image));
pixel.red=ScaleCharToQuantum(ReadBlobByte(image));
break;
}
}
image->colormap[i]=pixel;
}
}
if (EOFBlob(image))
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
if (image_info->ping && (image_info->subrange != 0))
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
/*
Convert TGA pixels to pixel packets.
*/
base=0;
flag=0;
skip=False;
real=0;
index=0;
runlength=0;
offset=0;
pixel.opacity=OpaqueOpacity;
for (y=0; y < (long) image->rows; y++)
{
real=offset;
if (((unsigned char) (tga_info.attributes & 0x20) >> 5) == 0)
real=image->rows-real-1;
q=SetImagePixels(image,0,(long) real,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
indexes=AccessMutableIndexes(image);
for (x=0; x < (long) image->columns; x++)
{
if ((tga_info.image_type == TGARLEColormap) ||
(tga_info.image_type == TGARLERGB) ||
(tga_info.image_type == TGARLEMonochrome))
{
if (runlength != 0)
{
runlength--;
skip=flag != 0;
}
else
{
if (ReadBlob(image,1,(char *) &runlength) != 1)
{
status=MagickFail;
break;
}
flag=runlength & 0x80;
if (flag != 0)
runlength-=128;
skip=False;
}
}
if (!skip)
switch (tga_info.bits_per_pixel)
{
case 8:
default:
{
/*
Gray scale.
*/
index=ReadBlobByte(image);
if (image->storage_class == PseudoClass)
{
VerifyColormapIndex(image,index);
pixel=image->colormap[index];
}
else
{
pixel.blue=pixel.green=pixel.red=ScaleCharToQuantum(index);
}
break;
}
case 15:
case 16:
{
/*
5 bits each of red green and blue.
*/
unsigned int
packet;
packet = ReadBlobByte(image);
packet |= (((unsigned int) ReadBlobByte(image)) << 8);
pixel.red=(packet >> 10) & 0x1f;
pixel.red=ScaleCharToQuantum(ScaleColor5to8(pixel.red));
pixel.green=(packet >> 5) & 0x1f;
pixel.green=ScaleCharToQuantum(ScaleColor5to8(pixel.green));
pixel.blue=packet & 0x1f;
pixel.blue=ScaleCharToQuantum(ScaleColor5to8(pixel.blue));
if (image->matte)
{
if ((packet >> 15) & 0x01)
pixel.opacity=OpaqueOpacity;
else
pixel.opacity=TransparentOpacity;
}
if (image->storage_class == PseudoClass)
{
index=(IndexPacket) (packet & 0x7fff);
VerifyColormapIndex(image,index);
}
break;
}
case 24:
/*
8 bits each of blue green and red.
*/
pixel.blue=ScaleCharToQuantum(ReadBlobByte(image));
pixel.green=ScaleCharToQuantum(ReadBlobByte(image));
pixel.red=ScaleCharToQuantum(ReadBlobByte(image));
break;
case 32:
{
/*
8 bits each of blue green and red.
*/
pixel.blue=ScaleCharToQuantum(ReadBlobByte(image));
pixel.green=ScaleCharToQuantum(ReadBlobByte(image));
pixel.red=ScaleCharToQuantum(ReadBlobByte(image));
pixel.opacity=ScaleCharToQuantum(255-ReadBlobByte(image));
break;
}
}
if (EOFBlob(image))
status = MagickFail;
if (status == MagickFail)
ThrowReaderException(CorruptImageError,UnableToReadImageData,image);
if (image->storage_class == PseudoClass)
indexes[x]=index;
*q++=pixel;
}
if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 4)
offset+=4;
else
if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 2)
offset+=2;
else
offset++;
if (offset >= image->rows)
{
base++;
offset=base;
}
if (!SyncImagePixels(image))
break;
image->is_grayscale=is_grayscale;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,exception,
LoadImageText,image->filename,
image->columns,image->rows))
break;
}
if (EOFBlob(image))
{
ThrowException(exception,CorruptImageError,UnexpectedEndOfFile,
image->filename);
break;
}
/*
Proceed to next image.
*/
if (image_info->subrange != 0)
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
count=ReadBlob(image,1,(char *) &tga_info.id_length);
tga_info.colormap_type=ReadBlobByte(image);
tga_info.image_type=ReadBlobByte(image);
status=((tga_info.image_type == TGAColormap) ||
(tga_info.image_type == TGARGB) ||
(tga_info.image_type == TGAMonochrome) ||
(tga_info.image_type == TGARLEColormap) ||
(tga_info.image_type == TGARLERGB) ||
(tga_info.image_type == TGARLEMonochrome));
if (!EOFBlob(image) && (status == True))
{
/*
Allocate next image structure.
*/
AllocateNextImage(image_info,image);
if (image->next == (Image *) NULL)
{
DestroyImageList(image);
return((Image *) NULL);
}
image=SyncNextImageInList(image);
if (!MagickMonitorFormatted(TellBlob(image),GetBlobSize(image),
exception,LoadImagesText,
image->filename))
break;
}
} while (status == True);
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r T G A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method RegisterTGAImage adds attributes for the TGA 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 RegisterTGAImage method is:
%
% RegisterTGAImage(void)
%
*/
ModuleExport void RegisterTGAImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("ICB");
entry->decoder=(DecoderHandler) ReadTGAImage;
entry->encoder=(EncoderHandler) WriteTGAImage;
entry->description="Truevision Targa image";
entry->module="TGA";
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("TGA");
entry->decoder=(DecoderHandler) ReadTGAImage;
entry->encoder=(EncoderHandler) WriteTGAImage;
entry->description="Truevision Targa image";
entry->module="TGA";
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("VDA");
entry->decoder=(DecoderHandler) ReadTGAImage;
entry->encoder=(EncoderHandler) WriteTGAImage;
entry->description="Truevision Targa image";
entry->module="TGA";
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("VST");
entry->decoder=(DecoderHandler) ReadTGAImage;
entry->encoder=(EncoderHandler) WriteTGAImage;
entry->description="Truevision Targa image";
entry->module="TGA";
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r T G A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method UnregisterTGAImage removes format registrations made by the
% TGA module from the list of supported formats.
%
% The format of the UnregisterTGAImage method is:
%
% UnregisterTGAImage(void)
%
*/
ModuleExport void UnregisterTGAImage(void)
{
(void) UnregisterMagickInfo("ICB");
(void) UnregisterMagickInfo("TGA");
(void) UnregisterMagickInfo("VDA");
(void) UnregisterMagickInfo("VST");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e T G A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method WriteTGAImage writes a image in the Truevision Targa rasterfile
% format.
%
% The format of the WriteTGAImage method is:
%
% unsigned int WriteTGAImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Method WriteTGAImage return True if the image is written.
% False is returned is there is a memory shortage or if the image file
% fails to write.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o image: A pointer to an Image structure.
%
%
*/
static unsigned int WriteTGAImage(const ImageInfo *image_info,Image *image)
{
#define TargaColormap 1
#define TargaRGB 2
#define TargaMonochrome 3
#define TargaRLEColormap 9
#define TargaRLERGB 10
#define TargaRLEMonochrome 11
typedef struct _TargaInfo
{
unsigned char
id_length,
colormap_type,
image_type;
unsigned short
colormap_index,
colormap_length;
unsigned char
colormap_size;
unsigned short
x_origin,
y_origin,
width,
height;
unsigned char
bits_per_pixel,
attributes;
} TargaInfo;
const ImageAttribute
*attribute;
size_t
count;
long
y;
register const PixelPacket
*p;
register const IndexPacket
*indexes;
register long
x;
register long
i;
register unsigned char
*q;
TargaInfo
targa_info;
unsigned char
*targa_pixels;
unsigned int
write_grayscale,
status;
unsigned long
scene;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == False)
ThrowWriterException(FileOpenError,UnableToOpenFile,image);
scene=0;
do
{
ImageCharacteristics
characteristics;
write_grayscale=False;
/*
If requested output is grayscale, then write grayscale.
*/
if ((image_info->type == GrayscaleType) ||
(image_info->type == GrayscaleMatteType))
write_grayscale=True;
/*
Convert colorspace to an RGB-compatible type.
*/
(void) TransformColorspace(image,RGBColorspace);
/*
Analyze image to be written.
*/
(void) GetImageCharacteristics(image,&characteristics,
(OptimizeType == image_info->type),
&image->exception);
/*
If some other type has not been requested and the image is
grayscale, then write a grayscale image unless the image
contains an alpha channel.
*/
if (((image_info->type != TrueColorType) &&
(image_info->type != TrueColorMatteType) &&
(image_info->type != PaletteType) &&
(image->matte == False)) &&
(characteristics.grayscale))
write_grayscale=True;
/*
If there are too many colors for colormapped output or the
image contains an alpha channel, then promote to TrueColor.
*/
if (((write_grayscale == False) &&
(image->storage_class == PseudoClass) &&
(image->colors > 256)) ||
(image->matte == True))
{
/* (void) SyncImage(image); */
image->storage_class=DirectClass;
}
/*
Initialize TGA raster file header.
*/
targa_info.id_length=0;
attribute=GetImageAttribute(image,"comment");
if (attribute != (const ImageAttribute *) NULL)
targa_info.id_length=Min(strlen(attribute->value),255);
targa_info.colormap_type=0;
targa_info.colormap_index=0;
targa_info.colormap_length=0;
targa_info.colormap_size=0;
targa_info.x_origin=0;
targa_info.y_origin=0;
targa_info.width=(unsigned short) image->columns;
targa_info.height=(unsigned short) image->rows;
targa_info.bits_per_pixel=8;
targa_info.attributes=0;
if (write_grayscale == True)
{
/*
Grayscale without Colormap
*/
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Writing Grayscale raster ...");
targa_info.image_type=TargaMonochrome;
targa_info.bits_per_pixel=8;
targa_info.colormap_type=0;
targa_info.colormap_index=0;
targa_info.colormap_length=0;
targa_info.colormap_size=0;
}
else if (image->storage_class == DirectClass)
{
/*
Full color TGA raster.
*/
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Writing TrueColor raster ...");
targa_info.image_type=TargaRGB;
targa_info.bits_per_pixel=24;
if (image->matte)
{
targa_info.bits_per_pixel=32;
targa_info.attributes=8; /* # of alpha bits */
}
}
else
{
/*
Colormapped TGA raster.
*/
(void) LogMagickEvent(CoderEvent,GetMagickModule(),
"Writing ColorMapped raster ..." );
targa_info.image_type=TargaColormap;
targa_info.colormap_type=1;
targa_info.colormap_index=0;
targa_info.colormap_length=(unsigned short) image->colors;
targa_info.colormap_size=24;
}
/*
Write TGA header.
*/
(void) WriteBlobByte(image,targa_info.id_length);
(void) WriteBlobByte(image,targa_info.colormap_type);
(void) WriteBlobByte(image,targa_info.image_type);
(void) WriteBlobLSBShort(image,targa_info.colormap_index);
(void) WriteBlobLSBShort(image,targa_info.colormap_length);
(void) WriteBlobByte(image,targa_info.colormap_size);
(void) WriteBlobLSBShort(image,targa_info.x_origin);
(void) WriteBlobLSBShort(image,targa_info.y_origin);
(void) WriteBlobLSBShort(image,targa_info.width);
(void) WriteBlobLSBShort(image,targa_info.height);
(void) WriteBlobByte(image,targa_info.bits_per_pixel);
(void) WriteBlobByte(image,targa_info.attributes);
if (targa_info.id_length != 0)
(void) WriteBlob(image,targa_info.id_length,attribute->value);
if (targa_info.image_type == TargaColormap)
{
unsigned char
*targa_colormap;
/*
Dump colormap to file (blue, green, red byte order).
*/
targa_colormap=MagickAllocateArray(unsigned char *,
targa_info.colormap_length,3);
if (targa_colormap == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed,
image);
q=targa_colormap;
for (i=0; i < (long) image->colors; i++)
{
*q++=ScaleQuantumToChar(image->colormap[i].blue);
*q++=ScaleQuantumToChar(image->colormap[i].green);
*q++=ScaleQuantumToChar(image->colormap[i].red);
}
(void) WriteBlob(image,3*targa_info.colormap_length,
(char *) targa_colormap);
MagickFreeMemory(targa_colormap);
}
/*
Convert MIFF to TGA raster pixels.
*/
count=(size_t) ((targa_info.bits_per_pixel*targa_info.width) >> 3);
targa_pixels=MagickAllocateMemory(unsigned char *,count);
if (targa_pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed,image);
for (y=(long) (image->rows-1); y >= 0; y--)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
q=targa_pixels;
indexes=AccessImmutableIndexes(image);
for (x=0; x < (long) image->columns; x++)
{
if (targa_info.image_type == TargaColormap)
{
/* Colormapped */
*q++=*indexes;
indexes++;
}
else if (targa_info.image_type == TargaMonochrome)
{
/* Grayscale */
if (image->storage_class == PseudoClass)
{
if (image->is_grayscale)
*q++=ScaleQuantumToChar(image->colormap[*indexes].red);
else
*q++=PixelIntensityToQuantum(&image->colormap[*indexes]);
indexes++;
}
else
{
if (image->is_grayscale)
*q++=ScaleQuantumToChar(p->red);
else
*q++=PixelIntensityToQuantum(p);
}
}
else
{
/* TrueColor RGB */
*q++=ScaleQuantumToChar(p->blue);
*q++=ScaleQuantumToChar(p->green);
*q++=ScaleQuantumToChar(p->red);
if (image->matte)
*q++=ScaleQuantumToChar(MaxRGB-p->opacity);
}
p++;
}
(void) WriteBlob(image,q-targa_pixels,(char *) targa_pixels);
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
break;
}
MagickFreeMemory(targa_pixels);
if (image->next == (Image *) NULL)
break;
image=SyncNextImageInList(image);
if (!MagickMonitorFormatted(scene++,GetImageListLength(image),
&image->exception,SaveImagesText,
image->filename))
break;
} while (image_info->adjoin);
if (image_info->adjoin)
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
return(True);
}