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Import Upstream version 6.9.11.60
2023-02-03 21:16:55 +08:00
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% X X CCCC FFFFF %
% X X C F %
% X C FFF %
% X X C F %
% X X CCCC F %
% %
% %
% Read GIMP XCF Image Format %
% %
% Software Design %
% Leonard Rosenthol %
% November 2001 %
% %
% %
% 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/blob.h"
#include "magick/blob-private.h"
#include "magick/cache.h"
#include "magick/color.h"
#include "magick/composite.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/pixel.h"
#include "magick/pixel-accessor.h"
#include "magick/property.h"
#include "magick/quantize.h"
#include "magick/quantum-private.h"
#include "magick/resource_.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
/*
Typedef declarations.
*/
typedef enum
{
GIMP_RGB,
GIMP_GRAY,
GIMP_INDEXED
} GimpImageBaseType;
typedef enum
{
PROP_END = 0,
PROP_COLORMAP = 1,
PROP_ACTIVE_LAYER = 2,
PROP_ACTIVE_CHANNEL = 3,
PROP_SELECTION = 4,
PROP_FLOATING_SELECTION = 5,
PROP_OPACITY = 6,
PROP_MODE = 7,
PROP_VISIBLE = 8,
PROP_LINKED = 9,
PROP_PRESERVE_TRANSPARENCY = 10,
PROP_APPLY_MASK = 11,
PROP_EDIT_MASK = 12,
PROP_SHOW_MASK = 13,
PROP_SHOW_MASKED = 14,
PROP_OFFSETS = 15,
PROP_COLOR = 16,
PROP_COMPRESSION = 17,
PROP_GUIDES = 18,
PROP_RESOLUTION = 19,
PROP_TATTOO = 20,
PROP_PARASITES = 21,
PROP_UNIT = 22,
PROP_PATHS = 23,
PROP_USER_UNIT = 24
} PropType;
typedef enum
{
COMPRESS_NONE = 0,
COMPRESS_RLE = 1,
COMPRESS_ZLIB = 2, /* unused */
COMPRESS_FRACTAL = 3 /* unused */
} XcfCompressionType;
typedef struct
{
size_t
width,
height,
image_type,
bytes_per_pixel;
int
compression;
size_t
file_size;
size_t
number_layers;
ExceptionInfo
*exception;
} XCFDocInfo;
typedef struct
{
char
name[1024];
unsigned int
active;
size_t
width,
height,
type,
alpha,
visible,
linked,
preserve_trans,
apply_mask,
show_mask,
edit_mask,
floating_offset;
ssize_t
offset_x,
offset_y;
size_t
mode,
tattoo;
Image
*image;
} XCFLayerInfo;
#define TILE_WIDTH 64
#define TILE_HEIGHT 64
typedef struct
{
unsigned char
red,
green,
blue,
alpha;
} XCFPixelInfo;
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s X C F %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsXCF() returns MagickTrue if the image format type, identified by the
% magick string, is XCF (GIMP native format).
%
% The format of the IsXCF method is:
%
% MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: compare image format pattern against these bytes.
%
% o length: Specifies the length of the magick string.
%
%
*/
static MagickBooleanType IsXCF(const unsigned char *magick,const size_t length)
{
if (length < 8)
return(MagickFalse);
if (LocaleNCompare((char *) magick,"gimp xcf",8) == 0)
return(MagickTrue);
return(MagickFalse);
}
typedef enum
{
GIMP_NORMAL_MODE,
GIMP_DISSOLVE_MODE,
GIMP_BEHIND_MODE,
GIMP_MULTIPLY_MODE,
GIMP_SCREEN_MODE,
GIMP_OVERLAY_MODE,
GIMP_DIFFERENCE_MODE,
GIMP_ADDITION_MODE,
GIMP_SUBTRACT_MODE,
GIMP_DARKEN_ONLY_MODE,
GIMP_LIGHTEN_ONLY_MODE,
GIMP_HUE_MODE,
GIMP_SATURATION_MODE,
GIMP_COLOR_MODE,
GIMP_VALUE_MODE,
GIMP_DIVIDE_MODE,
GIMP_DODGE_MODE,
GIMP_BURN_MODE,
GIMP_HARDLIGHT_MODE
} GimpLayerModeEffects;
/*
Simple utility routine to convert between PSD blending modes and
ImageMagick compositing operators
*/
static CompositeOperator GIMPBlendModeToCompositeOperator(
size_t blendMode)
{
switch ( blendMode )
{
case GIMP_NORMAL_MODE: return(OverCompositeOp);
case GIMP_DISSOLVE_MODE: return(DissolveCompositeOp);
case GIMP_MULTIPLY_MODE: return(MultiplyCompositeOp);
case GIMP_SCREEN_MODE: return(ScreenCompositeOp);
case GIMP_OVERLAY_MODE: return(OverlayCompositeOp);
case GIMP_DIFFERENCE_MODE: return(DifferenceCompositeOp);
case GIMP_ADDITION_MODE: return(ModulusAddCompositeOp);
case GIMP_SUBTRACT_MODE: return(ModulusSubtractCompositeOp);
case GIMP_DARKEN_ONLY_MODE: return(DarkenCompositeOp);
case GIMP_LIGHTEN_ONLY_MODE: return(LightenCompositeOp);
case GIMP_HUE_MODE: return(HueCompositeOp);
case GIMP_SATURATION_MODE: return(SaturateCompositeOp);
case GIMP_COLOR_MODE: return(ColorizeCompositeOp);
case GIMP_DODGE_MODE: return(ColorDodgeCompositeOp);
case GIMP_BURN_MODE: return(ColorBurnCompositeOp);
case GIMP_HARDLIGHT_MODE: return(HardLightCompositeOp);
case GIMP_DIVIDE_MODE: return(DivideDstCompositeOp);
/* these are the ones we don't support...yet */
case GIMP_BEHIND_MODE: return(OverCompositeOp);
case GIMP_VALUE_MODE: return(OverCompositeOp);
default: return(OverCompositeOp);
}
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b S t r i n g W i t h L o n g S i z e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobStringWithLongSize reads characters from a blob or file
% starting with a ssize_t length byte and then characters to that length
%
% The format of the ReadBlobStringWithLongSize method is:
%
% char *ReadBlobStringWithLongSize(Image *image,char *string,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o string: the address of a character buffer.
%
% o exception: return any errors or warnings in this structure.
%
*/
static char *ReadBlobStringWithLongSize(Image *image,char *string,size_t max,
ExceptionInfo *exception)
{
int
c;
MagickOffsetType
offset;
ssize_t
i;
size_t
length;
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
assert(max != 0);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
length=ReadBlobMSBLong(image);
for (i=0; i < (ssize_t) MagickMin(length,max-1); i++)
{
c=ReadBlobByte(image);
if (c == EOF)
return((char *) NULL);
string[i]=(char) c;
}
string[i]='\0';
offset=SeekBlob(image,(MagickOffsetType) (length-i),SEEK_CUR);
if (offset < 0)
(void) ThrowMagickException(exception,GetMagickModule(),
CorruptImageError,"ImproperImageHeader","`%s'",image->filename);
return(string);
}
static MagickBooleanType load_tile(Image *image,Image *tile_image,
XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
ExceptionInfo *exception)
{
ssize_t
y;
ssize_t
x;
PixelPacket
*q;
size_t
extent;
ssize_t
count;
unsigned char
*graydata;
XCFPixelInfo
*xcfdata,
*xcfodata;
extent=0;
if (inDocInfo->image_type == GIMP_GRAY)
extent=tile_image->columns*tile_image->rows*sizeof(*graydata);
else
if (inDocInfo->image_type == GIMP_RGB)
extent=tile_image->columns*tile_image->rows*sizeof(*xcfdata);
if (extent > data_length)
ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
image->filename);
xcfdata=(XCFPixelInfo *) AcquireQuantumMemory(MagickMax(data_length,
tile_image->columns*tile_image->rows),sizeof(*xcfdata));
if (xcfdata == (XCFPixelInfo *) NULL)
ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
image->filename);
xcfodata=xcfdata;
graydata=(unsigned char *) xcfdata; /* used by gray and indexed */
count=ReadBlob(image,data_length,(unsigned char *) xcfdata);
if (count != (ssize_t) data_length)
{
xcfodata=(XCFPixelInfo *) RelinquishMagickMemory(xcfodata);
ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
image->filename);
}
for (y=0; y < (ssize_t) tile_image->rows; y++)
{
q=GetAuthenticPixels(tile_image,0,y,tile_image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
if (inDocInfo->image_type == GIMP_GRAY)
{
for (x=0; x < (ssize_t) tile_image->columns; x++)
{
SetPixelRed(q,ScaleCharToQuantum(*graydata));
SetPixelGreen(q,GetPixelRed(q));
SetPixelBlue(q,GetPixelRed(q));
SetPixelAlpha(q,ScaleCharToQuantum((unsigned char)
inLayerInfo->alpha));
graydata++;
q++;
}
}
else
if (inDocInfo->image_type == GIMP_RGB)
{
for (x=0; x < (ssize_t) tile_image->columns; x++)
{
SetPixelRed(q,ScaleCharToQuantum(xcfdata->red));
SetPixelGreen(q,ScaleCharToQuantum(xcfdata->green));
SetPixelBlue(q,ScaleCharToQuantum(xcfdata->blue));
SetPixelAlpha(q,xcfdata->alpha == 255U ? TransparentOpacity :
ScaleCharToQuantum((unsigned char) inLayerInfo->alpha));
xcfdata++;
q++;
}
}
if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
break;
}
xcfodata=(XCFPixelInfo *) RelinquishMagickMemory(xcfodata);
return MagickTrue;
}
static MagickBooleanType load_tile_rle(Image *image,Image *tile_image,
XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
ExceptionInfo *exception)
{
MagickOffsetType
size;
Quantum
alpha,
data;
PixelPacket
*q;
size_t
length;
ssize_t
bytes_per_pixel,
count,
i,
j;
unsigned char
pixel,
*xcfdata,
*xcfodata,
*xcfdatalimit;
bytes_per_pixel=(ssize_t) inDocInfo->bytes_per_pixel;
xcfdata=(unsigned char *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
if (xcfdata == (unsigned char *) NULL)
ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
image->filename);
xcfodata=xcfdata;
count=ReadBlob(image, (size_t) data_length, xcfdata);
xcfdatalimit = xcfodata+count-1;
alpha=ScaleCharToQuantum((unsigned char) inLayerInfo->alpha);
for (i=0; i < bytes_per_pixel; i++)
{
q=GetAuthenticPixels(tile_image,0,0,tile_image->columns,tile_image->rows,
exception);
if (q == (PixelPacket *) NULL)
continue;
size=(MagickOffsetType) tile_image->rows*tile_image->columns;
while (size > 0)
{
if (xcfdata > xcfdatalimit)
goto bogus_rle;
pixel=(*xcfdata++);
length=(size_t) pixel;
if (length >= 128)
{
length=255-(length-1);
if (length == 128)
{
if (xcfdata >= xcfdatalimit)
goto bogus_rle;
length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
xcfdata+=2;
}
size-=length;
if (size < 0)
goto bogus_rle;
if (&xcfdata[length-1] > xcfdatalimit)
goto bogus_rle;
while (length-- > 0)
{
data=ScaleCharToQuantum(*xcfdata++);
switch (i)
{
case 0:
{
SetPixelRed(q,data);
if (inDocInfo->image_type == GIMP_GRAY)
{
SetPixelGreen(q,data);
SetPixelBlue(q,data);
}
else
{
SetPixelGreen(q,GetPixelRed(q));
SetPixelBlue(q,GetPixelRed(q));
}
SetPixelAlpha(q,alpha);
break;
}
case 1:
{
if (inDocInfo->image_type == GIMP_GRAY)
SetPixelAlpha(q,data);
else
SetPixelGreen(q,data);
break;
}
case 2:
{
SetPixelBlue(q,data);
break;
}
case 3:
{
SetPixelAlpha(q,data);
break;
}
}
q++;
}
}
else
{
length+=1;
if (length == 128)
{
if (xcfdata >= xcfdatalimit)
goto bogus_rle;
length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
xcfdata+=2;
}
size-=length;
if (size < 0)
goto bogus_rle;
if (xcfdata > xcfdatalimit)
goto bogus_rle;
pixel=(*xcfdata++);
for (j=0; j < (ssize_t) length; j++)
{
data=ScaleCharToQuantum(pixel);
switch (i)
{
case 0:
{
SetPixelRed(q,data);
if (inDocInfo->image_type == GIMP_GRAY)
{
SetPixelGreen(q,data);
SetPixelBlue(q,data);
}
else
{
SetPixelGreen(q,GetPixelRed(q));
SetPixelBlue(q,GetPixelRed(q));
}
SetPixelAlpha(q,alpha);
break;
}
case 1:
{
if (inDocInfo->image_type == GIMP_GRAY)
SetPixelAlpha(q,data);
else
SetPixelGreen(q,data);
break;
}
case 2:
{
SetPixelBlue(q,data);
break;
}
case 3:
{
SetPixelAlpha(q,data);
break;
}
}
q++;
}
}
}
if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
break;
}
xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
return(MagickTrue);
bogus_rle:
if (xcfodata != (unsigned char *) NULL)
xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
return(MagickFalse);
}
static MagickBooleanType load_level(Image *image,XCFDocInfo *inDocInfo,
XCFLayerInfo *inLayerInfo,ExceptionInfo *exception)
{
int
destLeft = 0,
destTop = 0;
Image*
tile_image;
MagickBooleanType
status;
MagickOffsetType
saved_pos,
offset,
offset2;
ssize_t
i;
size_t
width,
height,
ntiles,
ntile_rows,
ntile_cols,
tile_image_width,
tile_image_height;
/* start reading the data */
width=ReadBlobMSBLong(image);
height=ReadBlobMSBLong(image);
/*
Read in the first tile offset. If it is '0', then this tile level is empty
and we can simply return.
*/
offset=(MagickOffsetType) ReadBlobMSBLong(image);
if (EOFBlob(image) != MagickFalse)
ThrowBinaryException(CorruptImageError,"UnexpectedEndOfFile",
image->filename);
if (offset == 0)
{
(void) SetImageBackgroundColor(image);
return(MagickTrue);
}
/*
Initialize the reference for the in-memory tile-compression.
*/
ntile_rows=(height+TILE_HEIGHT-1)/TILE_HEIGHT;
ntile_cols=(width+TILE_WIDTH-1)/TILE_WIDTH;
ntiles=ntile_rows*ntile_cols;
for (i = 0; i < (ssize_t) ntiles; i++)
{
status=MagickFalse;
if (offset == 0)
ThrowBinaryException(CorruptImageError,"NotEnoughTiles",image->filename);
/*
Save the current position as it is where the next tile offset is stored.
*/
saved_pos=TellBlob(image);
/* read in the offset of the next tile so we can calculate the amount
of data needed for this tile*/
offset2=(MagickOffsetType) ReadBlobMSBLong(image);
if ((MagickSizeType) offset2 >= inDocInfo->file_size)
ThrowBinaryException(CorruptImageError,"InsufficientImageDataInFile",
image->filename);
/* if the offset is 0 then we need to read in the maximum possible
allowing for negative compression */
if (offset2 == 0)
offset2=(MagickOffsetType) (offset + TILE_WIDTH * TILE_WIDTH * 4* 1.5);
/* seek to the tile offset */
if ((offset > offset2) || ( SeekBlob(image, offset, SEEK_SET) != offset))
ThrowBinaryException(CorruptImageError,"InsufficientImageDataInFile",
image->filename);
/*
Allocate the image for the tile. NOTE: the last tile in a row or
column may not be a full tile!
*/
tile_image_width=(size_t) (destLeft == (int) ntile_cols-1 ?
(int) width % TILE_WIDTH : TILE_WIDTH);
if (tile_image_width == 0)
tile_image_width=TILE_WIDTH;
tile_image_height = (size_t) (destTop == (int) ntile_rows-1 ?
(int) height % TILE_HEIGHT : TILE_HEIGHT);
if (tile_image_height == 0)
tile_image_height=TILE_HEIGHT;
tile_image=CloneImage(inLayerInfo->image,tile_image_width,
tile_image_height,MagickTrue,exception);
if (tile_image == (Image *) NULL)
ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
image->filename);
(void) SetImageBackgroundColor(tile_image);
/* read in the tile */
switch (inDocInfo->compression)
{
case COMPRESS_NONE:
status=load_tile(image,tile_image,inDocInfo,inLayerInfo,(size_t)
(offset2-offset),&image->exception);
break;
case COMPRESS_RLE:
status=load_tile_rle(image,tile_image,inDocInfo,inLayerInfo,(size_t)
(offset2-offset),&image->exception);
break;
case COMPRESS_ZLIB:
tile_image=DestroyImage(tile_image);
ThrowBinaryException(CoderError,"ZipCompressNotSupported",
image->filename)
case COMPRESS_FRACTAL:
tile_image=DestroyImage(tile_image);
ThrowBinaryException(CoderError,"FractalCompressNotSupported",
image->filename)
}
/* composite the tile onto the layer's image, and then destroy it */
if (status != MagickFalse)
(void) CompositeImage(inLayerInfo->image,CopyCompositeOp,tile_image,
destLeft * TILE_WIDTH,destTop*TILE_HEIGHT);
tile_image=DestroyImage(tile_image);
if (status == MagickFalse)
return(MagickFalse);
/* adjust tile position */
destLeft++;
if (destLeft >= (int) ntile_cols)
{
destLeft = 0;
destTop++;
}
/* restore the saved position so we'll be ready to
* read the next offset.
*/
offset=SeekBlob(image, saved_pos, SEEK_SET);
/* read in the offset of the next tile */
offset=(MagickOffsetType) ReadBlobMSBLong(image);
}
if (offset != 0)
ThrowBinaryException(CorruptImageError,"CorruptImage",image->filename)
return(MagickTrue);
}
static MagickBooleanType load_hierarchy(Image *image,XCFDocInfo *inDocInfo,
XCFLayerInfo *inLayer)
{
MagickOffsetType
saved_pos,
offset,
junk;
(void) ReadBlobMSBLong(image); /* width */
(void) ReadBlobMSBLong(image); /* height */
inDocInfo->bytes_per_pixel=ReadBlobMSBLong(image);
/* load in the levels...we make sure that the number of levels
* calculated when the TileManager was created is the same
* as the number of levels found in the file.
*/
offset=(MagickOffsetType) ReadBlobMSBLong(image); /* top level */
if ((MagickSizeType) offset >= GetBlobSize(image))
ThrowBinaryImageException(CorruptImageError,"InsufficientImageDataInFile",
image->filename);
/* discard offsets for layers below first, if any.
*/
do
{
junk=(MagickOffsetType) ReadBlobMSBLong(image);
}
while (junk != 0);
/* save the current position as it is where the
* next level offset is stored.
*/
saved_pos=TellBlob(image);
/* seek to the level offset */
if (SeekBlob(image, offset, SEEK_SET) != offset)
ThrowBinaryImageException(CorruptImageError,"InsufficientImageDataInFile",
image->filename);
/* read in the level */
if (load_level (image, inDocInfo, inLayer, &image->exception) == 0)
return(MagickFalse);
/* restore the saved position so we'll be ready to
* read the next offset.
*/
offset=SeekBlob(image, saved_pos, SEEK_SET);
return(MagickTrue);
}
static void InitXCFImage(XCFLayerInfo *outLayer)
{
outLayer->image->page.x=outLayer->offset_x;
outLayer->image->page.y=outLayer->offset_y;
outLayer->image->page.width=outLayer->width;
outLayer->image->page.height=outLayer->height;
(void) SetImageProperty(outLayer->image,"label",(char *)outLayer->name);
}
static MagickBooleanType ReadOneLayer(const ImageInfo *image_info,Image* image,
XCFDocInfo* inDocInfo,XCFLayerInfo *outLayer,const ssize_t layer)
{
MagickBooleanType
status;
MagickOffsetType
offset;
unsigned int
foundPropEnd = 0;
size_t
hierarchy_offset,
layer_mask_offset;
/* clear the block! */
(void) memset( outLayer, 0, sizeof( XCFLayerInfo ) );
/* read in the layer width, height, type and name */
outLayer->width = ReadBlobMSBLong(image);
outLayer->height = ReadBlobMSBLong(image);
outLayer->type = ReadBlobMSBLong(image);
(void) ReadBlobStringWithLongSize(image, outLayer->name,
sizeof(outLayer->name),&image->exception);
if (EOFBlob(image) != MagickFalse)
ThrowBinaryImageException(CorruptImageError,"InsufficientImageDataInFile",
image->filename);
if ((outLayer->width == 0) || (outLayer->height == 0))
ThrowBinaryImageException(CorruptImageError,"ImproperImageHeader",
image->filename);
/* read the layer properties! */
foundPropEnd = 0;
while ( (foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse) ) {
PropType prop_type = (PropType) ReadBlobMSBLong(image);
size_t prop_size = ReadBlobMSBLong(image);
switch (prop_type)
{
case PROP_END:
foundPropEnd = 1;
break;
case PROP_ACTIVE_LAYER:
outLayer->active = 1;
break;
case PROP_FLOATING_SELECTION:
outLayer->floating_offset = ReadBlobMSBLong(image);
break;
case PROP_OPACITY:
outLayer->alpha = ReadBlobMSBLong(image);
break;
case PROP_VISIBLE:
outLayer->visible = ReadBlobMSBLong(image);
break;
case PROP_LINKED:
outLayer->linked = ReadBlobMSBLong(image);
break;
case PROP_PRESERVE_TRANSPARENCY:
outLayer->preserve_trans = ReadBlobMSBLong(image);
break;
case PROP_APPLY_MASK:
outLayer->apply_mask = ReadBlobMSBLong(image);
break;
case PROP_EDIT_MASK:
outLayer->edit_mask = ReadBlobMSBLong(image);
break;
case PROP_SHOW_MASK:
outLayer->show_mask = ReadBlobMSBLong(image);
break;
case PROP_OFFSETS:
outLayer->offset_x = ReadBlobMSBSignedLong(image);
outLayer->offset_y = ReadBlobMSBSignedLong(image);
break;
case PROP_MODE:
outLayer->mode = ReadBlobMSBLong(image);
break;
case PROP_TATTOO:
outLayer->preserve_trans = ReadBlobMSBLong(image);
break;
case PROP_PARASITES:
{
if (DiscardBlobBytes(image,prop_size) == MagickFalse)
ThrowFileException(&image->exception,CorruptImageError,
"UnexpectedEndOfFile",image->filename);
/*
ssize_t base = info->cp;
GimpParasite *p;
while (info->cp - base < prop_size)
{
p = xcf_load_parasite(info);
gimp_drawable_parasite_attach(GIMP_DRAWABLE(layer), p);
gimp_parasite_free(p);
}
if (info->cp - base != prop_size)
g_message ("Error detected while loading a layer's parasites");
*/
}
break;
default:
/* g_message ("unexpected/unknown layer property: %d (skipping)",
prop_type); */
{
int buf[16];
ssize_t amount;
/* read over it... */
while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
{
amount = (ssize_t) MagickMin(16, prop_size);
amount = ReadBlob(image, (size_t) amount, (unsigned char *) &buf);
if (!amount)
ThrowBinaryImageException(CorruptImageError,"CorruptImage",
image->filename);
prop_size -= (size_t) MagickMin(16, (size_t) amount);
}
}
break;
}
}
if (EOFBlob(image) != MagickFalse)
ThrowBinaryImageException(CorruptImageError,"UnexpectedEndOfFile",
image->filename);
if (foundPropEnd == MagickFalse)
return(MagickFalse);
/* allocate the image for this layer */
if (image_info->number_scenes != 0)
{
ssize_t
scene;
scene=inDocInfo->number_layers-layer-1;
if (scene > (ssize_t) (image_info->scene+image_info->number_scenes-1))
{
outLayer->image=CloneImage(image,0,0,MagickTrue,&image->exception);
if (outLayer->image == (Image *) NULL)
return(MagickFalse);
InitXCFImage(outLayer);
return(MagickTrue);
}
}
/* allocate the image for this layer */
outLayer->image=CloneImage(image,outLayer->width, outLayer->height,MagickTrue,
&image->exception);
if (outLayer->image == (Image *) NULL)
return(MagickFalse);
status=SetImageExtent(outLayer->image,outLayer->image->columns,
outLayer->image->rows);
if (status != MagickFalse)
status=ResetImagePixels(image,&image->exception);
if (status == MagickFalse)
{
InheritException(&image->exception,&outLayer->image->exception);
outLayer->image=DestroyImageList(outLayer->image);
return(MagickFalse);
}
/* clear the image based on the layer opacity */
outLayer->image->background_color.opacity=
ScaleCharToQuantum((unsigned char) (255-outLayer->alpha));
if (outLayer->alpha != 255U)
{
outLayer->image->matte=MagickTrue;
(void) SetImageBackgroundColor(outLayer->image);
}
InitXCFImage(outLayer);
/* set the compositing mode */
outLayer->image->compose = GIMPBlendModeToCompositeOperator( outLayer->mode );
if ( outLayer->visible == MagickFalse )
{
/* BOGUS: should really be separate member var! */
outLayer->image->compose = NoCompositeOp;
}
/* read the hierarchy and layer mask offsets */
hierarchy_offset = ReadBlobMSBLong(image);
layer_mask_offset = ReadBlobMSBLong(image);
/* read in the hierarchy */
offset=SeekBlob(image, (MagickOffsetType) hierarchy_offset, SEEK_SET);
if (offset != (MagickOffsetType) hierarchy_offset)
ThrowBinaryImageException(CorruptImageError,"InvalidImageHeader",
image->filename);
if (load_hierarchy (image, inDocInfo, outLayer) == 0)
return(MagickFalse);
/* read in the layer mask */
if (layer_mask_offset != 0)
{
offset=SeekBlob(image, (MagickOffsetType) layer_mask_offset, SEEK_SET);
#if 0 /* BOGUS: support layer masks! */
layer_mask = xcf_load_layer_mask (info, gimage);
if (layer_mask == 0)
goto error;
/* set the offsets of the layer_mask */
GIMP_DRAWABLE (layer_mask)->offset_x = GIMP_DRAWABLE (layer)->offset_x;
GIMP_DRAWABLE (layer_mask)->offset_y = GIMP_DRAWABLE (layer)->offset_y;
gimp_layer_add_mask (layer, layer_mask, MagickFalse);
layer->mask->apply_mask = apply_mask;
layer->mask->edit_mask = edit_mask;
layer->mask->show_mask = show_mask;
#endif
}
/* attach the floating selection... */
#if 0 /* BOGUS: we may need to read this, even if we don't support it! */
if (add_floating_sel)
{
GimpLayer *floating_sel;
floating_sel = info->floating_sel;
floating_sel_attach (floating_sel, GIMP_DRAWABLE (layer));
}
#endif
return MagickTrue;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d X C F I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadXCFImage() reads a GIMP (GNU Image Manipulation Program) 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 ReadXCFImage method is:
%
% image=ReadXCFImage(image_info)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadXCFImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
char
magick[14];
Image
*image;
int
foundPropEnd = 0;
MagickBooleanType
status;
MagickOffsetType
offset;
ssize_t
i;
size_t
image_type,
length;
ssize_t
count;
XCFDocInfo
doc_info;
/*
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);
}
count=ReadBlob(image,14,(unsigned char *) magick);
if ((count != 14) ||
(LocaleNCompare((char *) magick,"gimp xcf",8) != 0))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
(void) memset(&doc_info,0,sizeof(XCFDocInfo));
doc_info.exception=exception;
doc_info.width=ReadBlobMSBLong(image);
doc_info.height=ReadBlobMSBLong(image);
if ((doc_info.width > 262144) || (doc_info.height > 262144))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
doc_info.image_type=ReadBlobMSBLong(image);
/*
Initialize image attributes.
*/
image->columns=doc_info.width;
image->rows=doc_info.height;
image_type=doc_info.image_type;
doc_info.file_size=GetBlobSize(image);
image->compression=NoCompression;
image->depth=8;
status=SetImageExtent(image,image->columns,image->rows);
if (status == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
if (status != MagickFalse)
status=ResetImagePixels(image,exception);
if (image_type == GIMP_INDEXED)
ThrowReaderException(CoderError,"ColormapTypeNotSupported");
if (image_type == GIMP_RGB)
SetImageColorspace(image,sRGBColorspace);
else if (image_type == GIMP_GRAY)
SetImageColorspace(image,GRAYColorspace);
else
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
(void) SetImageBackgroundColor(image);
(void) SetImageOpacity(image,OpaqueOpacity);
/*
Read properties.
*/
while ((foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse))
{
PropType prop_type = (PropType) ReadBlobMSBLong(image);
size_t prop_size = ReadBlobMSBLong(image);
switch (prop_type)
{
case PROP_END:
foundPropEnd=1;
break;
case PROP_COLORMAP:
{
/* Cannot rely on prop_size here--the value is set incorrectly
by some Gimp versions.
*/
size_t num_colours = ReadBlobMSBLong(image);
if (DiscardBlobBytes(image,3*num_colours) == MagickFalse)
ThrowFileException(&image->exception,CorruptImageError,
"UnexpectedEndOfFile",image->filename);
/*
if (info->file_version == 0)
{
gint i;
g_message (_("XCF warning: version 0 of XCF file format\n"
"did not save indexed colormaps correctly.\n"
"Substituting grayscale map."));
info->cp +=
xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
gimage->cmap = g_new (guchar, gimage->num_cols*3);
xcf_seek_pos (info, info->cp + gimage->num_cols);
for (i = 0; i<gimage->num_cols; i++)
{
gimage->cmap[i*3+0] = i;
gimage->cmap[i*3+1] = i;
gimage->cmap[i*3+2] = i;
}
}
else
{
info->cp +=
xcf_read_int32 (info->fp, (guint32*) &gimage->num_cols, 1);
gimage->cmap = g_new (guchar, gimage->num_cols*3);
info->cp +=
xcf_read_int8 (info->fp,
(guint8*) gimage->cmap, gimage->num_cols*3);
}
*/
break;
}
case PROP_COMPRESSION:
{
doc_info.compression = ReadBlobByte(image);
if ((doc_info.compression != COMPRESS_NONE) &&
(doc_info.compression != COMPRESS_RLE) &&
(doc_info.compression != COMPRESS_ZLIB) &&
(doc_info.compression != COMPRESS_FRACTAL))
ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
}
break;
case PROP_GUIDES:
{
/* just skip it - we don't care about guides */
if (DiscardBlobBytes(image,prop_size) == MagickFalse)
ThrowFileException(&image->exception,CorruptImageError,
"UnexpectedEndOfFile",image->filename);
}
break;
case PROP_RESOLUTION:
{
/* float xres = (float) */ (void) ReadBlobMSBLong(image);
/* float yres = (float) */ (void) ReadBlobMSBLong(image);
/*
if (xres < GIMP_MIN_RESOLUTION || xres > GIMP_MAX_RESOLUTION ||
yres < GIMP_MIN_RESOLUTION || yres > GIMP_MAX_RESOLUTION)
{
g_message ("Warning, resolution out of range in XCF file");
xres = gimage->gimp->config->default_xresolution;
yres = gimage->gimp->config->default_yresolution;
}
*/
/* BOGUS: we don't write these yet because we aren't
reading them properly yet :(
image->x_resolution = xres;
image->y_resolution = yres;
*/
}
break;
case PROP_TATTOO:
{
/* we need to read it, even if we ignore it */
/*size_t tattoo_state = */ (void) ReadBlobMSBLong(image);
}
break;
case PROP_PARASITES:
{
/* BOGUS: we may need these for IPTC stuff */
if (DiscardBlobBytes(image,prop_size) == MagickFalse)
ThrowFileException(&image->exception,CorruptImageError,
"UnexpectedEndOfFile",image->filename);
/*
gssize_t base = info->cp;
GimpParasite *p;
while (info->cp - base < prop_size)
{
p = xcf_load_parasite (info);
gimp_image_parasite_attach (gimage, p);
gimp_parasite_free (p);
}
if (info->cp - base != prop_size)
g_message ("Error detected while loading an image's parasites");
*/
}
break;
case PROP_UNIT:
{
/* BOGUS: ignore for now... */
/*size_t unit = */ (void) ReadBlobMSBLong(image);
}
break;
case PROP_PATHS:
{
/* BOGUS: just skip it for now */
if (DiscardBlobBytes(image,prop_size) == MagickFalse)
ThrowFileException(&image->exception,CorruptImageError,
"UnexpectedEndOfFile",image->filename);
/*
PathList *paths = xcf_load_bzpaths (gimage, info);
gimp_image_set_paths (gimage, paths);
*/
}
break;
case PROP_USER_UNIT:
{
char unit_string[1000];
/*BOGUS: ignored for now */
/*float factor = (float) */ (void) ReadBlobMSBLong(image);
/* size_t digits = */ (void) ReadBlobMSBLong(image);
for (i=0; i<5; i++)
(void) ReadBlobStringWithLongSize(image, unit_string,
sizeof(unit_string),&image->exception);
}
break;
default:
{
int buf[16];
ssize_t amount;
/* read over it... */
while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
{
amount=(ssize_t) MagickMin(16, prop_size);
amount=(ssize_t) ReadBlob(image,(size_t) amount,(unsigned char *) &buf);
if (!amount)
ThrowReaderException(CorruptImageError,"CorruptImage");
prop_size -= (size_t) MagickMin(16,(size_t) amount);
}
}
break;
}
}
if (foundPropEnd == MagickFalse)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
{
; /* do nothing, were just pinging! */
}
else
{
int
current_layer = 0,
foundAllLayers = MagickFalse,
number_layers = 0;
MagickOffsetType
oldPos=TellBlob(image);
XCFLayerInfo
*layer_info;
/*
The read pointer.
*/
do
{
ssize_t offset = ReadBlobMSBSignedLong(image);
if (offset == 0)
foundAllLayers=MagickTrue;
else
number_layers++;
if (EOFBlob(image) != MagickFalse)
{
ThrowFileException(exception,CorruptImageError,
"UnexpectedEndOfFile",image->filename);
break;
}
} while (foundAllLayers == MagickFalse);
if (AcquireMagickResource(ListLengthResource,number_layers) == MagickFalse)
ThrowReaderException(ResourceLimitError,"ListLengthExceedsLimit");
doc_info.number_layers=number_layers;
offset=SeekBlob(image,oldPos,SEEK_SET); /* restore the position! */
if (offset < 0)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
/* allocate our array of layer info blocks */
length=(size_t) number_layers;
layer_info=(XCFLayerInfo *) AcquireQuantumMemory(length,
sizeof(*layer_info));
if (layer_info == (XCFLayerInfo *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
(void) memset(layer_info,0,number_layers*sizeof(XCFLayerInfo));
for ( ; ; )
{
MagickBooleanType
layer_ok;
MagickOffsetType
offset,
saved_pos;
/* read in the offset of the next layer */
offset=(MagickOffsetType) ReadBlobMSBLong(image);
/* if the offset is 0 then we are at the end
* of the layer list.
*/
if (offset == 0)
break;
/* save the current position as it is where the
* next layer offset is stored.
*/
saved_pos=TellBlob(image);
/* seek to the layer offset */
layer_ok=MagickFalse;
if (SeekBlob(image,offset,SEEK_SET) == offset)
{
/* read in the layer */
layer_ok=ReadOneLayer(image_info,image,&doc_info,
&layer_info[current_layer],current_layer);
}
if (layer_ok == MagickFalse)
{
ssize_t j;
for (j=0; j <= current_layer; j++)
if (layer_info[j].image != (Image *) NULL)
layer_info[j].image=DestroyImage(layer_info[j].image);
layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
ThrowReaderException(ResourceLimitError,"NotEnoughPixelData");
}
/* restore the saved position so we'll be ready to
* read the next offset.
*/
offset=SeekBlob(image, saved_pos, SEEK_SET);
current_layer++;
}
#if 0
{
/* NOTE: XCF layers are REVERSED from composite order! */
signed int j;
for (j=number_layers-1; j>=0; j--) {
/* BOGUS: need to consider layer blending modes!! */
if ( layer_info[j].visible ) { /* only visible ones, please! */
CompositeImage(image, OverCompositeOp, layer_info[j].image,
layer_info[j].offset_x, layer_info[j].offset_y );
layer_info[j].image =DestroyImage( layer_info[j].image );
/* If we do this, we'll get REAL gray images! */
if ( image_type == GIMP_GRAY ) {
QuantizeInfo qi;
GetQuantizeInfo(&qi);
qi.colorspace = GRAYColorspace;
QuantizeImage( &qi, layer_info[j].image );
}
}
}
}
#else
{
/* NOTE: XCF layers are REVERSED from composite order! */
ssize_t j;
/* now reverse the order of the layers as they are put
into subimages
*/
for (j=(ssize_t) number_layers-1; j >= 0; j--)
AppendImageToList(&image,layer_info[j].image);
}
#endif
layer_info=(XCFLayerInfo *) RelinquishMagickMemory(layer_info);
#if 0 /* BOGUS: do we need the channels?? */
while (MagickTrue)
{
/* read in the offset of the next channel */
info->cp += xcf_read_int32 (info->fp, &offset, 1);
/* if the offset is 0 then we are at the end
* of the channel list.
*/
if (offset == 0)
break;
/* save the current position as it is where the
* next channel offset is stored.
*/
saved_pos = info->cp;
/* seek to the channel offset */
xcf_seek_pos (info, offset);
/* read in the layer */
channel = xcf_load_channel (info, gimage);
if (channel == 0)
goto error;
num_successful_elements++;
/* add the channel to the image if its not the selection */
if (channel != gimage->selection_mask)
gimp_image_add_channel (gimage, channel, -1);
/* restore the saved position so we'll be ready to
* read the next offset.
*/
xcf_seek_pos (info, saved_pos);
}
#endif
}
(void) CloseBlob(image);
if (GetNextImageInList(image) != (Image *) NULL)
DestroyImage(RemoveFirstImageFromList(&image));
if (image_type == GIMP_GRAY)
image->type=GrayscaleType;
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r X C F I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterXCFImage() adds attributes for the XCF 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 RegisterXCFImage method is:
%
% size_t RegisterXCFImage(void)
%
*/
ModuleExport size_t RegisterXCFImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("XCF");
entry->decoder=(DecodeImageHandler *) ReadXCFImage;
entry->magick=(IsImageFormatHandler *) IsXCF;
entry->description=ConstantString("GIMP image");
entry->magick_module=ConstantString("XCF");
entry->seekable_stream=MagickTrue;
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r X C F I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterXCFImage() removes format registrations made by the
% XCF module from the list of supported formats.
%
% The format of the UnregisterXCFImage method is:
%
% UnregisterXCFImage(void)
%
*/
ModuleExport void UnregisterXCFImage(void)
{
(void) UnregisterMagickInfo("XCF");
}