forked from openkylin/imagemagick
1019 lines
34 KiB
C
1019 lines
34 KiB
C
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% 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 %
|
||
% Cristy %
|
||
% July 1992 %
|
||
% %
|
||
% %
|
||
% Copyright 1999-2021 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 %
|
||
% %
|
||
% https://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/artifact.h"
|
||
#include "magick/attribute.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/colorspace-private.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/option.h"
|
||
#include "magick/pixel-accessor.h"
|
||
#include "magick/property.h"
|
||
#include "magick/quantum-private.h"
|
||
#include "magick/static.h"
|
||
#include "magick/string_.h"
|
||
#include "magick/module.h"
|
||
|
||
/*
|
||
Enumerated declaractions.
|
||
*/
|
||
typedef enum
|
||
{
|
||
TGAColormap = 1,
|
||
TGARGB = 2,
|
||
TGAMonochrome = 3,
|
||
TGARLEColormap = 9,
|
||
TGARLERGB = 10,
|
||
TGARLEMonochrome = 11
|
||
} TGAImageType;
|
||
|
||
/*
|
||
Typedef declaractions.
|
||
*/
|
||
typedef struct _TGAInfo
|
||
{
|
||
TGAImageType
|
||
image_type;
|
||
|
||
unsigned char
|
||
id_length,
|
||
colormap_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;
|
||
|
||
/*
|
||
Forward declarations.
|
||
*/
|
||
static MagickBooleanType
|
||
WriteTGAImage(const ImageInfo *,Image *);
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% 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)
|
||
{
|
||
Image
|
||
*image;
|
||
|
||
IndexPacket
|
||
index;
|
||
|
||
MagickBooleanType
|
||
status;
|
||
|
||
PixelPacket
|
||
pixel;
|
||
|
||
IndexPacket
|
||
*indexes;
|
||
|
||
PixelPacket
|
||
*q;
|
||
|
||
ssize_t
|
||
i,
|
||
x;
|
||
|
||
size_t
|
||
base,
|
||
flag,
|
||
offset,
|
||
skip;
|
||
|
||
ssize_t
|
||
count,
|
||
y;
|
||
|
||
TGAInfo
|
||
tga_info;
|
||
|
||
unsigned char
|
||
j,
|
||
k,
|
||
pixels[4],
|
||
runlength;
|
||
|
||
unsigned int
|
||
alpha_bits;
|
||
|
||
/*
|
||
Open image file.
|
||
*/
|
||
assert(image_info != (const ImageInfo *) NULL);
|
||
assert(image_info->signature == MagickCoreSignature);
|
||
if (image_info->debug != MagickFalse)
|
||
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
|
||
image_info->filename);
|
||
assert(exception != (ExceptionInfo *) NULL);
|
||
assert(exception->signature == MagickCoreSignature);
|
||
image=AcquireImage(image_info);
|
||
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
|
||
if (status == MagickFalse)
|
||
{
|
||
image=DestroyImageList(image);
|
||
return((Image *) NULL);
|
||
}
|
||
/*
|
||
Read TGA header information.
|
||
*/
|
||
count=ReadBlob(image,1,&tga_info.id_length);
|
||
tga_info.colormap_type=(unsigned char) ReadBlobByte(image);
|
||
tga_info.image_type=(TGAImageType) ReadBlobByte(image);
|
||
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);
|
||
if (EOFBlob(image) != MagickFalse)
|
||
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
|
||
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(CorruptImageError,"ImproperImageHeader");
|
||
/*
|
||
Initialize image structure.
|
||
*/
|
||
image->columns=tga_info.width;
|
||
image->rows=tga_info.height;
|
||
if ((tga_info.image_type != TGAMonochrome) &&
|
||
(tga_info.image_type != TGARLEMonochrome))
|
||
{
|
||
alpha_bits=(tga_info.attributes & 0x0FU);
|
||
image->matte=(alpha_bits > 0) || (tga_info.bits_per_pixel == 32) ||
|
||
(tga_info.colormap_size == 32) ? MagickTrue : MagickFalse;
|
||
}
|
||
if ((tga_info.image_type != TGAColormap) &&
|
||
(tga_info.image_type != TGARLEColormap))
|
||
image->depth=(size_t) ((tga_info.bits_per_pixel <= 8) ? 8 :
|
||
(tga_info.bits_per_pixel <= 16) ? 5 : 8);
|
||
else
|
||
image->depth=(size_t) ((tga_info.colormap_size <= 8) ? 8 :
|
||
(tga_info.colormap_size <= 16) ? 5 : 8);
|
||
if ((tga_info.image_type == TGAColormap) ||
|
||
(tga_info.image_type == TGARLEColormap))
|
||
image->storage_class=PseudoClass;
|
||
if ((tga_info.image_type == TGAMonochrome) ||
|
||
(tga_info.image_type == TGARLEMonochrome))
|
||
{
|
||
image->type=GrayscaleType;
|
||
image->colorspace=GRAYColorspace;
|
||
}
|
||
image->compression=NoCompression;
|
||
if ((tga_info.image_type == TGARLEColormap) ||
|
||
(tga_info.image_type == TGARLEMonochrome) ||
|
||
(tga_info.image_type == TGARLERGB))
|
||
image->compression=RLECompression;
|
||
if (image->storage_class == PseudoClass)
|
||
{
|
||
if (tga_info.colormap_type != 0)
|
||
image->colors=tga_info.colormap_index+tga_info.colormap_length;
|
||
else
|
||
{
|
||
size_t
|
||
one;
|
||
|
||
one=1;
|
||
image->colors=one << tga_info.bits_per_pixel;
|
||
if ((MagickSizeType) image->colors > GetBlobSize(image))
|
||
ThrowReaderException(CorruptImageError,
|
||
"InsufficientImageDataInFile");
|
||
if (AcquireImageColormap(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-1))
|
||
comment=(char *) AcquireQuantumMemory(length+MaxTextExtent,
|
||
sizeof(*comment));
|
||
if (comment == (char *) NULL)
|
||
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
||
count=ReadBlob(image,length,(unsigned char *) comment);
|
||
if (count == (ssize_t) length)
|
||
{
|
||
comment[length]='\0';
|
||
(void) SetImageProperty(image,"comment",comment);
|
||
}
|
||
comment=DestroyString(comment);
|
||
}
|
||
if ((tga_info.attributes & (1UL << 4)) == 0)
|
||
{
|
||
if ((tga_info.attributes & (1UL << 5)) == 0)
|
||
image->orientation=BottomLeftOrientation;
|
||
else
|
||
image->orientation=TopLeftOrientation;
|
||
}
|
||
else
|
||
{
|
||
if ((tga_info.attributes & (1UL << 5)) == 0)
|
||
image->orientation=BottomRightOrientation;
|
||
else
|
||
image->orientation=TopRightOrientation;
|
||
}
|
||
if (image_info->ping != MagickFalse)
|
||
{
|
||
(void) CloseBlob(image);
|
||
return(image);
|
||
}
|
||
status=SetImageExtent(image,image->columns,image->rows);
|
||
if (status == MagickFalse)
|
||
{
|
||
InheritException(exception,&image->exception);
|
||
return(DestroyImageList(image));
|
||
}
|
||
(void) memset(&pixel,0,sizeof(pixel));
|
||
pixel.opacity=(Quantum) OpaqueOpacity;
|
||
if (tga_info.colormap_type != 0)
|
||
{
|
||
/*
|
||
Read TGA raster colormap.
|
||
*/
|
||
if (image->colors < tga_info.colormap_index)
|
||
image->colors=tga_info.colormap_index;
|
||
if (AcquireImageColormap(image,image->colors) == MagickFalse)
|
||
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
||
for (i=0; i < (ssize_t) tga_info.colormap_index; i++)
|
||
image->colormap[i]=pixel;
|
||
for ( ; i < (ssize_t) 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:
|
||
{
|
||
QuantumAny
|
||
range;
|
||
|
||
/*
|
||
5 bits each of red green and blue.
|
||
*/
|
||
j=(unsigned char) ReadBlobByte(image);
|
||
k=(unsigned char) ReadBlobByte(image);
|
||
range=GetQuantumRange(5UL);
|
||
pixel.red=ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2,range);
|
||
pixel.green=ScaleAnyToQuantum((1UL*(k & 0x03) << 3)+
|
||
(1UL*(j & 0xe0) >> 5),range);
|
||
pixel.blue=ScaleAnyToQuantum(1UL*(j & 0x1f),range);
|
||
break;
|
||
}
|
||
case 24:
|
||
{
|
||
/*
|
||
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;
|
||
}
|
||
case 32:
|
||
{
|
||
/*
|
||
8 bits each of blue, green, red, and alpha.
|
||
*/
|
||
pixel.blue=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
|
||
pixel.green=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
|
||
pixel.red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
|
||
pixel.opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(
|
||
(unsigned char) ReadBlobByte(image)));
|
||
break;
|
||
}
|
||
}
|
||
image->colormap[i]=pixel;
|
||
}
|
||
}
|
||
/*
|
||
Convert TGA pixels to pixel packets.
|
||
*/
|
||
base=0;
|
||
flag=0;
|
||
skip=MagickFalse;
|
||
index=(IndexPacket) 0;
|
||
runlength=0;
|
||
offset=0;
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
q=QueueAuthenticPixels(image,0,offset,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetAuthenticIndexQueue(image);
|
||
for (x=0; x < (ssize_t) 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 != 1)
|
||
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.
|
||
*/
|
||
if (ReadBlob(image,1,pixels) != 1)
|
||
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
|
||
index=(Quantum) pixels[0];
|
||
if (tga_info.colormap_type != 0)
|
||
pixel=image->colormap[(ssize_t) ConstrainColormapIndex(image,
|
||
(ssize_t) 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:
|
||
{
|
||
QuantumAny
|
||
range;
|
||
|
||
/*
|
||
5 bits each of RGB;
|
||
*/
|
||
if (ReadBlob(image,2,pixels) != 2)
|
||
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
|
||
j=pixels[0];
|
||
k=pixels[1];
|
||
range=GetQuantumRange(5UL);
|
||
pixel.red=ScaleAnyToQuantum(1UL*(k & 0x7c) >> 2,range);
|
||
pixel.green=ScaleAnyToQuantum((1UL*(k & 0x03) << 3)+
|
||
(1UL*(j & 0xe0) >> 5),range);
|
||
pixel.blue=ScaleAnyToQuantum(1UL*(j & 0x1f),range);
|
||
if (image->matte != MagickFalse)
|
||
pixel.opacity=(k & 0x80) == 0 ? (Quantum) TransparentOpacity :
|
||
(Quantum) OpaqueOpacity;
|
||
if (image->storage_class == PseudoClass)
|
||
index=ConstrainColormapIndex(image,(ssize_t) ((size_t) k << 8)+j);
|
||
break;
|
||
}
|
||
case 24:
|
||
{
|
||
/*
|
||
BGR pixels.
|
||
*/
|
||
if (ReadBlob(image,3,pixels) != 3)
|
||
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
|
||
pixel.blue=ScaleCharToQuantum(pixels[0]);
|
||
pixel.green=ScaleCharToQuantum(pixels[1]);
|
||
pixel.red=ScaleCharToQuantum(pixels[2]);
|
||
break;
|
||
}
|
||
case 32:
|
||
{
|
||
/*
|
||
BGRA pixels.
|
||
*/
|
||
if (ReadBlob(image,4,pixels) != 4)
|
||
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
|
||
pixel.blue=ScaleCharToQuantum(pixels[0]);
|
||
pixel.green=ScaleCharToQuantum(pixels[1]);
|
||
pixel.red=ScaleCharToQuantum(pixels[2]);
|
||
pixel.opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(
|
||
pixels[3]));
|
||
break;
|
||
}
|
||
}
|
||
if (status == MagickFalse)
|
||
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
|
||
if (image->storage_class == PseudoClass)
|
||
SetPixelIndex(indexes+x,index);
|
||
SetPixelRed(q,pixel.red);
|
||
SetPixelGreen(q,pixel.green);
|
||
SetPixelBlue(q,pixel.blue);
|
||
if (image->matte != MagickFalse)
|
||
SetPixelOpacity(q,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 (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
if (EOFBlob(image) != MagickFalse)
|
||
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
|
||
image->filename);
|
||
(void) 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:
|
||
%
|
||
% size_t RegisterTGAImage(void)
|
||
%
|
||
*/
|
||
ModuleExport size_t RegisterTGAImage(void)
|
||
{
|
||
MagickInfo
|
||
*entry;
|
||
|
||
entry=SetMagickInfo("ICB");
|
||
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
|
||
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
|
||
entry->adjoin=MagickFalse;
|
||
entry->description=ConstantString("Truevision Targa image");
|
||
entry->magick_module=ConstantString("TGA");
|
||
entry->seekable_stream=MagickTrue;
|
||
(void) RegisterMagickInfo(entry);
|
||
entry=SetMagickInfo("TGA");
|
||
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
|
||
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
|
||
entry->adjoin=MagickFalse;
|
||
entry->description=ConstantString("Truevision Targa image");
|
||
entry->magick_module=ConstantString("TGA");
|
||
entry->seekable_stream=MagickTrue;
|
||
(void) RegisterMagickInfo(entry);
|
||
entry=SetMagickInfo("VDA");
|
||
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
|
||
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
|
||
entry->adjoin=MagickFalse;
|
||
entry->description=ConstantString("Truevision Targa image");
|
||
entry->magick_module=ConstantString("TGA");
|
||
entry->seekable_stream=MagickTrue;
|
||
(void) RegisterMagickInfo(entry);
|
||
entry=SetMagickInfo("VST");
|
||
entry->decoder=(DecodeImageHandler *) ReadTGAImage;
|
||
entry->encoder=(EncodeImageHandler *) WriteTGAImage;
|
||
entry->adjoin=MagickFalse;
|
||
entry->description=ConstantString("Truevision Targa image");
|
||
entry->magick_module=ConstantString("TGA");
|
||
entry->seekable_stream=MagickTrue;
|
||
(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 void WriteTGAPixel(Image *image,TGAImageType image_type,
|
||
const IndexPacket *indexes,const PixelPacket *p,const QuantumAny range,
|
||
const double midpoint)
|
||
{
|
||
if (image_type == TGAColormap || image_type == TGARLEColormap)
|
||
(void) WriteBlobByte(image,(unsigned char) GetPixelIndex(indexes));
|
||
else
|
||
{
|
||
if (image_type == TGAMonochrome || image_type == TGARLEMonochrome)
|
||
(void) WriteBlobByte(image,ScaleQuantumToChar(ClampToQuantum(
|
||
GetPixelLuma(image,p))));
|
||
else
|
||
if (image->depth == 5)
|
||
{
|
||
unsigned char
|
||
green,
|
||
value;
|
||
|
||
green=(unsigned char) ScaleQuantumToAny(GetPixelGreen(p),range);
|
||
value=((unsigned char) ScaleQuantumToAny(GetPixelBlue(p),range)) |
|
||
((green & 0x07) << 5);
|
||
(void) WriteBlobByte(image,value);
|
||
value=(unsigned char) ((((image->matte != MagickFalse) &&
|
||
((double) GetPixelOpacity(p) < midpoint)) ? 0x80 : 0) |
|
||
((unsigned char) ScaleQuantumToAny(GetPixelRed(p),range) << 2) |
|
||
((green & 0x18) >> 3));
|
||
(void) WriteBlobByte(image,value);
|
||
}
|
||
else
|
||
{
|
||
(void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelBlue(p)));
|
||
(void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelGreen(p)));
|
||
(void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelRed(p)));
|
||
if (image->matte != MagickFalse)
|
||
(void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelAlpha(p)));
|
||
}
|
||
}
|
||
}
|
||
|
||
static MagickBooleanType WriteTGAImage(const ImageInfo *image_info,Image *image)
|
||
{
|
||
CompressionType
|
||
compression;
|
||
|
||
const char
|
||
*comment,
|
||
*value;
|
||
|
||
const double
|
||
midpoint = QuantumRange/2.0;
|
||
|
||
MagickBooleanType
|
||
status;
|
||
|
||
QuantumAny
|
||
range;
|
||
|
||
const IndexPacket
|
||
*indexes;
|
||
|
||
const PixelPacket
|
||
*p;
|
||
|
||
ssize_t
|
||
x;
|
||
|
||
ssize_t
|
||
i;
|
||
|
||
unsigned char
|
||
*q;
|
||
|
||
ssize_t
|
||
base,
|
||
count,
|
||
offset,
|
||
y;
|
||
|
||
TGAInfo
|
||
tga_info;
|
||
|
||
/*
|
||
Open output image file.
|
||
*/
|
||
assert(image_info != (const ImageInfo *) NULL);
|
||
assert(image_info->signature == MagickCoreSignature);
|
||
assert(image != (Image *) NULL);
|
||
assert(image->signature == MagickCoreSignature);
|
||
if (image->debug != MagickFalse)
|
||
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
|
||
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
|
||
if (status == MagickFalse)
|
||
return(status);
|
||
/*
|
||
Initialize TGA raster file header.
|
||
*/
|
||
if ((image->columns > 65535L) || (image->rows > 65535L))
|
||
ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
|
||
(void) TransformImageColorspace(image,sRGBColorspace);
|
||
compression=image->compression;
|
||
if (image_info->compression != UndefinedCompression)
|
||
compression=image_info->compression;
|
||
range=GetQuantumRange(5UL);
|
||
tga_info.id_length=0;
|
||
comment=GetImageProperty(image,"comment");
|
||
if (comment != (const char *) NULL)
|
||
tga_info.id_length=(unsigned char) MagickMin(strlen(comment),255);
|
||
tga_info.colormap_type=0;
|
||
tga_info.colormap_index=0;
|
||
tga_info.colormap_length=0;
|
||
tga_info.colormap_size=0;
|
||
tga_info.x_origin=0;
|
||
tga_info.y_origin=0;
|
||
tga_info.width=(unsigned short) image->columns;
|
||
tga_info.height=(unsigned short) image->rows;
|
||
tga_info.bits_per_pixel=8;
|
||
tga_info.attributes=0;
|
||
if ((image_info->type != TrueColorType) &&
|
||
(image_info->type != TrueColorMatteType) &&
|
||
(image_info->type != PaletteType) &&
|
||
(image->matte == MagickFalse) &&
|
||
(SetImageGray(image,&image->exception) != MagickFalse))
|
||
tga_info.image_type=compression == RLECompression ? TGARLEMonochrome :
|
||
TGAMonochrome;
|
||
else
|
||
if ((image->storage_class == DirectClass) || (image->colors > 256))
|
||
{
|
||
/*
|
||
Full color TGA raster.
|
||
*/
|
||
tga_info.image_type=compression == RLECompression ? TGARLERGB : TGARGB;
|
||
if (image_info->depth == 5)
|
||
{
|
||
tga_info.bits_per_pixel=16;
|
||
if (image->matte != MagickFalse)
|
||
tga_info.attributes=1; /* # of alpha bits */
|
||
}
|
||
else
|
||
{
|
||
tga_info.bits_per_pixel=24;
|
||
if (image->matte != MagickFalse)
|
||
{
|
||
tga_info.bits_per_pixel=32;
|
||
tga_info.attributes=8; /* # of alpha bits */
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
Colormapped TGA raster.
|
||
*/
|
||
tga_info.image_type=compression == RLECompression ? TGARLEColormap :
|
||
TGAColormap;
|
||
tga_info.colormap_type=1;
|
||
tga_info.colormap_length=(unsigned short) image->colors;
|
||
if (image_info->depth == 5)
|
||
tga_info.colormap_size=16;
|
||
else
|
||
tga_info.colormap_size=24;
|
||
}
|
||
if ((image->orientation == BottomRightOrientation) ||
|
||
(image->orientation == TopRightOrientation))
|
||
tga_info.attributes|=(1UL << 4);
|
||
if ((image->orientation == TopLeftOrientation) ||
|
||
(image->orientation == TopRightOrientation))
|
||
tga_info.attributes|=(1UL << 5);
|
||
value=GetImageArtifact(image,"tga:image-origin"); /* deprecated */
|
||
if (value != (const char *) NULL)
|
||
{
|
||
OrientationType
|
||
origin;
|
||
|
||
origin=(OrientationType) ParseCommandOption(MagickOrientationOptions,
|
||
MagickFalse,value);
|
||
if (origin == BottomRightOrientation || origin == TopRightOrientation)
|
||
tga_info.attributes|=(1UL << 4);
|
||
if (origin == TopLeftOrientation || origin == TopRightOrientation)
|
||
tga_info.attributes|=(1UL << 5);
|
||
}
|
||
if ((image->columns > 65535) || (image->rows > 65535))
|
||
ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
|
||
/*
|
||
Write TGA header.
|
||
*/
|
||
(void) WriteBlobByte(image,tga_info.id_length);
|
||
(void) WriteBlobByte(image,tga_info.colormap_type);
|
||
(void) WriteBlobByte(image,(unsigned char) tga_info.image_type);
|
||
(void) WriteBlobLSBShort(image,tga_info.colormap_index);
|
||
(void) WriteBlobLSBShort(image,tga_info.colormap_length);
|
||
(void) WriteBlobByte(image,tga_info.colormap_size);
|
||
(void) WriteBlobLSBShort(image,tga_info.x_origin);
|
||
(void) WriteBlobLSBShort(image,tga_info.y_origin);
|
||
(void) WriteBlobLSBShort(image,tga_info.width);
|
||
(void) WriteBlobLSBShort(image,tga_info.height);
|
||
(void) WriteBlobByte(image,tga_info.bits_per_pixel);
|
||
(void) WriteBlobByte(image,tga_info.attributes);
|
||
if (tga_info.id_length != 0)
|
||
(void) WriteBlob(image,tga_info.id_length,(unsigned char *) comment);
|
||
if (tga_info.colormap_type != 0)
|
||
{
|
||
unsigned char
|
||
green,
|
||
*targa_colormap;
|
||
|
||
/*
|
||
Dump colormap to file (blue, green, red byte order).
|
||
*/
|
||
targa_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
|
||
tga_info.colormap_length,(tga_info.colormap_size/8)*sizeof(
|
||
*targa_colormap));
|
||
if (targa_colormap == (unsigned char *) NULL)
|
||
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
||
q=targa_colormap;
|
||
for (i=0; i < (ssize_t) image->colors; i++)
|
||
{
|
||
if (image_info->depth == 5)
|
||
{
|
||
green=(unsigned char) ScaleQuantumToAny(image->colormap[i].green,
|
||
range);
|
||
*q++=((unsigned char) ScaleQuantumToAny(image->colormap[i].blue,
|
||
range)) | ((green & 0x07) << 5);
|
||
*q++=(((image->matte != MagickFalse) && (
|
||
(double) image->colormap[i].opacity < midpoint)) ? 0x80 : 0) |
|
||
((unsigned char) ScaleQuantumToAny(image->colormap[i].red,
|
||
range) << 2) | ((green & 0x18) >> 3);
|
||
}
|
||
else
|
||
{
|
||
*q++=ScaleQuantumToChar(image->colormap[i].blue);
|
||
*q++=ScaleQuantumToChar(image->colormap[i].green);
|
||
*q++=ScaleQuantumToChar(image->colormap[i].red);
|
||
}
|
||
}
|
||
(void) WriteBlob(image,(size_t) ((tga_info.colormap_size/8)*
|
||
tga_info.colormap_length),targa_colormap);
|
||
targa_colormap=(unsigned char *) RelinquishMagickMemory(targa_colormap);
|
||
}
|
||
/*
|
||
Convert MIFF to TGA raster pixels.
|
||
*/
|
||
base=0;
|
||
offset=0;
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=GetVirtualPixels(image,0,offset,image->columns,1,&image->exception);
|
||
if (p == (const PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetVirtualIndexQueue(image);
|
||
if (compression == RLECompression)
|
||
{
|
||
x=0;
|
||
count=0;
|
||
while (x < (ssize_t) image->columns)
|
||
{
|
||
i=1;
|
||
while ((i < 128) && (count + i < 128) &&
|
||
((x + i) < (ssize_t) image->columns))
|
||
{
|
||
if (tga_info.image_type == TGARLEColormap)
|
||
{
|
||
if (GetPixelIndex(indexes+i) != GetPixelIndex(indexes+(i-1)))
|
||
break;
|
||
}
|
||
else
|
||
if (tga_info.image_type == TGARLEMonochrome)
|
||
{
|
||
if (GetPixelLuma(image,p+i) != GetPixelLuma(image,p+(i-1)))
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
if ((GetPixelBlue(p+i) != GetPixelBlue(p+(i-1))) ||
|
||
(GetPixelGreen(p+i) != GetPixelGreen(p+(i-1))) ||
|
||
(GetPixelRed(p+i) != GetPixelRed(p+(i-1))))
|
||
break;
|
||
if ((image->matte != MagickFalse) &&
|
||
(GetPixelAlpha(p+i) != GetPixelAlpha(p+(i-1))))
|
||
break;
|
||
}
|
||
i++;
|
||
}
|
||
if (i < 3)
|
||
{
|
||
count+=i;
|
||
p+=i;
|
||
indexes+=i;
|
||
}
|
||
if ((i >= 3) || (count == 128) ||
|
||
((x + i) == (ssize_t) image->columns))
|
||
{
|
||
if (count > 0)
|
||
{
|
||
(void) WriteBlobByte(image,(unsigned char) (--count));
|
||
while (count >= 0)
|
||
{
|
||
WriteTGAPixel(image,tga_info.image_type,indexes-(count+1),
|
||
p-(count+1),range,midpoint);
|
||
count--;
|
||
}
|
||
count=0;
|
||
}
|
||
}
|
||
if (i >= 3)
|
||
{
|
||
(void) WriteBlobByte(image,(unsigned char) ((i-1) | 0x80));
|
||
WriteTGAPixel(image,tga_info.image_type,indexes,p,range,midpoint);
|
||
p+=i;
|
||
indexes+=i;
|
||
}
|
||
x+=i;
|
||
}
|
||
}
|
||
else
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
WriteTGAPixel(image,tga_info.image_type,indexes+x,p++,range,midpoint);
|
||
if (((unsigned char) (tga_info.attributes & 0xc0) >> 6) == 2)
|
||
offset+=2;
|
||
else
|
||
offset++;
|
||
if (offset >= (ssize_t) image->rows)
|
||
{
|
||
base++;
|
||
offset=base;
|
||
}
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
(void) CloseBlob(image);
|
||
return(MagickTrue);
|
||
}
|