/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 %
% %
% %
% Copyright 1999-2007 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/color-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/property.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
/*
Forward declarations.
*/
static MagickBooleanType
WriteTGAImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s T G A %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsTGA() returns MagickTrue if the image format type, identified by the
% magick string, is a Microsoft Windows Enhanced MetaFile (TGA) file.
%
% The format of the ReadTGAImage method is:
%
% MagickBooleanType IsTGA(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: This string is generally the first few bytes of an image file
% or blob.
%
% o length: Specifies the length of the magick string.
%
*/
static MagickBooleanType IsTGA(const unsigned char *magick,const size_t length)
{
if (length < 4)
return(MagickFalse);
if (memcmp(magick,"\000\000\002\000",4) == 0)
return(MagickTrue);
return(MagickFalse);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d T G A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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_info: The image info.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadTGAImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
#define TGAColormap 1
#define TGARGB 2
#define TGAMonochrome 3
#define TGARLEColormap 9
#define TGARLERGB 10
#define TGARLEMonochrome 11
typedef struct _TGAInfo
{
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;
} TGAInfo;
Image
*image;
IndexPacket
index;
long
y;
MagickBooleanType
status;
PixelPacket
pixel;
register IndexPacket
*indexes;
register long
i,
x;
register PixelPacket
*q;
ssize_t
count;
TGAInfo
tga_info;
unsigned char
j,
k,
runlength;
unsigned long
base,
flag,
offset,
real,
skip;
/*
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=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Read TGA header information.
*/
count=ReadBlob(image,1,&tga_info.id_length);
tga_info.colormap_type=(unsigned char) ReadBlobByte(image);
tga_info.image_type=(unsigned char) ReadBlobByte(image);
do
{
if ((count != 1) ||
((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");
tga_info.colormap_index=ReadBlobLSBShort(image);
tga_info.colormap_length=ReadBlobLSBShort(image);
tga_info.colormap_size=(unsigned char) ReadBlobByte(image);
tga_info.x_origin=ReadBlobLSBShort(image);
tga_info.y_origin=ReadBlobLSBShort(image);
tga_info.width=(unsigned short) ReadBlobLSBShort(image);
tga_info.height=(unsigned short) ReadBlobLSBShort(image);
tga_info.bits_per_pixel=(unsigned char) ReadBlobByte(image);
tga_info.attributes=(unsigned char) ReadBlobByte(image);
/*
Initialize image structure.
*/
image->matte=(tga_info.attributes & 0x0FU) != 0 ? MagickTrue : MagickFalse;
image->columns=tga_info.width;
image->rows=tga_info.height;
if ((tga_info.image_type != TGAColormap) &&
(tga_info.image_type != TGARLEColormap))
image->depth=(unsigned long) ((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
image->depth=(unsigned long) ((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);
if ((tga_info.image_type == TGAColormap) ||
(tga_info.image_type == TGAMonochrome) ||
(tga_info.image_type == TGARLEColormap) ||
(tga_info.image_type == TGARLEMonochrome))
image->storage_class=PseudoClass;
image->compression=NoCompression;
if ((tga_info.image_type == TGARLEColormap) ||
(tga_info.image_type == TGARLEMonochrome))
image->compression=RLECompression;
if (image->storage_class == PseudoClass)
{
if (tga_info.colormap_type != 0)
image->colors=tga_info.colormap_length;
else
{
image->colors=0x01U << tga_info.bits_per_pixel;
if (AllocateImageColormap(image,image->colors) == MagickFalse)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
}
}
if (tga_info.id_length != 0)
{
char
*comment;
size_t
length;
/*
TGA image comment.
*/
length=(size_t) tga_info.id_length;
comment=(char *) NULL;
if (~length >= MaxTextExtent)
comment=(char *) AcquireQuantumMemory(length+MaxTextExtent,
sizeof(*comment));
if (comment == (char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
count=ReadBlob(image,tga_info.id_length,(unsigned char *) comment);
comment[tga_info.id_length]='\0';
(void) SetImageProperty(image,"comment",comment);
comment=DestroyString(comment);
}
(void) ResetMagickMemory(&pixel,0,sizeof(pixel));
pixel.opacity=(Quantum) TransparentOpacity;
if (tga_info.colormap_type != 0)
{
/*
Read TGA raster colormap.
*/
if (AllocateImageColormap(image,image->colors) == MagickFalse)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
for (i=0; i < (long) image->colors; i++)
{
switch (tga_info.colormap_size)
{
case 8:
default:
{
/*
Gray scale.
*/
pixel.red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
pixel.green=pixel.red;
pixel.blue=pixel.red;
break;
}
case 15:
case 16:
{
/*
5 bits each of red green and blue.
*/
j=(unsigned char) ReadBlobByte(image);
k=(unsigned char) ReadBlobByte(image);
pixel.red=ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2,5);
pixel.green=ScaleAnyToQuantum((1UL*(k & 0x03) << 3)+
(1UL*(j & 0xe0) >> 5),5);
pixel.blue=ScaleAnyToQuantum(1UL*(j & 0x1f),5);
break;
}
case 24:
case 32:
{
/*
8 bits each of blue, green and red.
*/
pixel.blue=ScaleCharToQuantum((unsigned char)
ReadBlobByte(image));
pixel.green=ScaleCharToQuantum((unsigned char)
ReadBlobByte(image));
pixel.red=ScaleCharToQuantum((unsigned char)
ReadBlobByte(image));
break;
}
}
image->colormap[i]=pixel;
}
}
if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
break;
if (SetImageExtent(image,0,0) == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
/*
Convert TGA pixels to pixel packets.
*/
base=0;
flag=0;
skip=MagickFalse;
real=0;
index=(IndexPacket) 0;
runlength=0;
offset=0;
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=GetIndexes(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
{
count=ReadBlob(image,1,&runlength);
if (count == 0)
ThrowReaderException(CorruptImageError,
"UnableToReadImageData");
flag=runlength & 0x80;
if (flag != 0)
runlength-=128;
skip=MagickFalse;
}
}
if (skip == MagickFalse)
switch (tga_info.bits_per_pixel)
{
case 8:
default:
{
/*
Gray scale.
*/
index=(IndexPacket) ReadBlobByte(image);
if (tga_info.colormap_type != 0)
pixel=image->colormap[(long) ConstrainColormapIndex(image,
1UL*index)];
else
{
pixel.red=ScaleCharToQuantum((unsigned char) index);
pixel.green=ScaleCharToQuantum((unsigned char) index);
pixel.blue=ScaleCharToQuantum((unsigned char) index);
}
break;
}
case 15:
case 16:
{
/*
5 bits each of red green and blue.
*/
j=(unsigned char) ReadBlobByte(image);
k=(unsigned char) ReadBlobByte(image);
pixel.red=ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2,5);
pixel.green=ScaleAnyToQuantum((1UL*(k & 0x03) << 3)+
(1UL*(j & 0xe0) >> 5),5);
pixel.blue=ScaleAnyToQuantum(1UL*(j & 0x1f),5);
if (image->matte != MagickFalse)
pixel.opacity=(k & 0x80) != 0 ? (Quantum) OpaqueOpacity :
(Quantum) TransparentOpacity;
if (image->storage_class == PseudoClass)
index=ConstrainColormapIndex(image,((unsigned long) k << 8)+j);
break;
}
case 24:
case 32:
{
/*
8 bits each of blue green and red.
*/
pixel.blue=ScaleCharToQuantum((unsigned char)
ReadBlobByte(image));
pixel.green=ScaleCharToQuantum((unsigned char)
ReadBlobByte(image));
pixel.red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
if (tga_info.bits_per_pixel == 32)
pixel.opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(
(unsigned char) ReadBlobByte(image)));
break;
}
}
if (status == MagickFalse)
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
if (image->storage_class == PseudoClass)
indexes[x]=index;
q->red=pixel.red;
q->green=pixel.green;
q->blue=pixel.blue;
if (image->matte != MagickFalse)
q->opacity=pixel.opacity;
q++;
}
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) == MagickFalse)
break;
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
if (EOFBlob(image) != MagickFalse)
{
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
break;
}
/*
Proceed to next image.
*/
if (image_info->number_scenes != 0)
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
break;
count=ReadBlob(image,1,&tga_info.id_length);
tga_info.colormap_type=(unsigned char) ReadBlobByte(image);
tga_info.image_type=(unsigned char) 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)) ? MagickTrue : MagickFalse;
if (status == MagickTrue)
{
/*
Allocate next image structure.
*/
AllocateNextImage(image_info,image);
if (GetNextImageInList(image) == (Image *) NULL)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
image=SyncNextImageInList(image);
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
status=image->progress_monitor(LoadImagesTag,TellBlob(image),
GetBlobSize(image),image->client_data);
if (status == MagickFalse)
break;
}
}
} while (status == MagickTrue);
CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r T G A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterTGAImage() adds properties for the TGA 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 RegisterTGAImage method is:
%
% unsigned long RegisterTGAImage(void)
%
*/
ModuleExport unsigned long RegisterTGAImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("ICB");
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
entry->magick=(IsImageFormatHandler *) IsTGA;
entry->description=ConstantString("Truevision Targa image");
entry->module=ConstantString("TGA");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("TGA");
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
entry->magick=(IsImageFormatHandler *) IsTGA;
entry->description=ConstantString("Truevision Targa image");
entry->module=ConstantString("TGA");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("VDA");
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
entry->magick=(IsImageFormatHandler *) IsTGA;
entry->description=ConstantString("Truevision Targa image");
entry->module=ConstantString("TGA");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("VST");
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
entry->magick=(IsImageFormatHandler *) IsTGA;
entry->description=ConstantString("Truevision Targa image");
entry->module=ConstantString("TGA");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r T G A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteTGAImage() writes a image in the Truevision Targa rasterfile
% format.
%
% The format of the WriteTGAImage method is:
%
% MagickBooleanType WriteTGAImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o image_info: The image info.
%
% o image: The image.
%
*/
static inline size_t MagickMin(const size_t x,const size_t y)
{
if (x < y)
return(x);
return(y);
}
static MagickBooleanType 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 char
*value;
long
y;
MagickBooleanType
status;
MagickOffsetType
scene;
register const PixelPacket
*p;
register IndexPacket
*indexes;
register long
x;
register long
i;
register unsigned char
*q;
ssize_t
count;
TargaInfo
targa_info;
unsigned char
*targa_pixels;
/*
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);
scene=0;
do
{
/*
Initialize TGA raster file header.
*/
if ((image->columns > 65535L) || (image->rows > 65535L))
ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
if (image_info->colorspace == UndefinedColorspace)
(void) SetImageColorspace(image,RGBColorspace);
targa_info.id_length=0;
value=GetImageProperty(image,"comment");
if (value != (const char *) NULL)
targa_info.id_length=(unsigned char) MagickMin(strlen(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 ((image_info->type != TrueColorType) &&
(image_info->type != TrueColorMatteType) &&
(image_info->type != PaletteType) &&
(image->matte == MagickFalse) &&
(IsGrayImage(image,&image->exception) != MagickFalse))
targa_info.image_type=TargaMonochrome;
else
if ((image->storage_class == DirectClass) || (image->colors > 256))
{
/*
Full color TGA raster.
*/
targa_info.image_type=TargaRGB;
targa_info.bits_per_pixel=24;
if (image->matte != MagickFalse)
{
targa_info.bits_per_pixel=32;
targa_info.attributes=8; /* # of alpha bits */
}
}
else
{
/*
Colormapped TGA raster.
*/
targa_info.image_type=TargaColormap;
targa_info.colormap_type=1;
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,(unsigned char *)
value);
if (targa_info.image_type == TargaColormap)
{
unsigned char
*targa_colormap;
/*
Dump colormap to file (blue, green, red byte order).
*/
targa_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
targa_info.colormap_length,3UL*sizeof(*targa_colormap));
if (targa_colormap == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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,(size_t) (3*targa_info.colormap_length),
targa_colormap);
targa_colormap=(unsigned char *) RelinquishMagickMemory(targa_colormap);
}
/*
Convert MIFF to TGA raster pixels.
*/
count=(ssize_t) (targa_info.bits_per_pixel*targa_info.width)/8;
targa_pixels=(unsigned char *) AcquireQuantumMemory((size_t) count,
sizeof(*targa_pixels));
if (targa_pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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=GetIndexes(image);
for (x=0; x < (long) image->columns; x++)
{
if (targa_info.image_type == TargaColormap)
*q++=(unsigned char) indexes[x];
else
if (targa_info.image_type == TargaMonochrome)
*q++=(unsigned char) ScaleQuantumToChar(PixelIntensityToQuantum(p));
else
{
*q++=ScaleQuantumToChar(p->blue);
*q++=ScaleQuantumToChar(p->green);
*q++=ScaleQuantumToChar(p->red);
if (image->matte != MagickFalse)
*q++=(unsigned char) ScaleQuantumToChar((Quantum)
(QuantumRange-p->opacity));
if (image->colorspace == CMYKColorspace)
*q++=ScaleQuantumToChar(indexes[x]);
}
p++;
}
(void) WriteBlob(image,(size_t) (q-targa_pixels),targa_pixels);
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
targa_pixels=(unsigned char *) RelinquishMagickMemory(targa_pixels);
if (GetNextImageInList(image) == (Image *) NULL)
break;
image=SyncNextImageInList(image);
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
status=image->progress_monitor(SaveImagesTag,scene,
GetImageListLength(image),image->client_data);
if (status == MagickFalse)
break;
}
scene++;
} while (image_info->adjoin != MagickFalse);
CloseBlob(image);
return(MagickTrue);
}
|
