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ensure multi-sample (such as grey+alpha) are handled via separate interface (#2006)

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This commit is contained in:
Frank Warmerdam 2009-02-13 21:28:58 +00:00
parent a042a8d460
commit e76cfb0205
1 changed files with 58 additions and 21 deletions
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77
libtiff/tif_getimage.c
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@ -1,4 +1,4 @@
/* $Id: tif_getimage.c,v 1.69 2008-01-01 15:41:49 fwarmerdam Exp $ */
/* $Id: tif_getimage.c,v 1.70 2009-02-13 21:28:58 fwarmerdam Exp $ */
/*
* Copyright (c) 1991-1997 Sam Leffler
@ -442,7 +442,7 @@ TIFFRGBAImageBegin(TIFFRGBAImage* img, TIFF* tif, int stop, char emsg[1024])
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &img->height);
TIFFGetFieldDefaulted(tif, TIFFTAG_ORIENTATION, &img->orientation);
img->isContig =
!(planarconfig == PLANARCONFIG_SEPARATE && colorchannels > 1);
!(planarconfig == PLANARCONFIG_SEPARATE && img->samplesperpixel > 1);
if (img->isContig) {
if (!PickContigCase(img)) {
sprintf(emsg, "Sorry, can not handle image");
@ -688,6 +688,7 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
int alpha = img->alpha;
uint32 nrow;
int ret = 1, flip;
int colorchannels;
tilesize = TIFFTileSize(tif);
buf = (unsigned char*) _TIFFmalloc((alpha?4:3)*tilesize);
@ -713,6 +714,20 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
toskew = -(int32)(tw - w);
}
switch( img->photometric )
{
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_PALETTE:
colorchannels = 1;
p2 = p1 = p0;
break;
default:
colorchannels = 3;
break;
}
for (row = 0; row < h; row += nrow)
{
rowstoread = th - (row + img->row_offset) % th;
@ -725,26 +740,29 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
ret = 0;
break;
}
if (TIFFReadTile(tif, p1, col+img->col_offset,
row+img->row_offset,0,1)!=(tmsize_t)(-1) && img->stoponerr)
if (colorchannels > 1
&& TIFFReadTile(tif, p1, col+img->col_offset,
row+img->row_offset,0,1) != (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (TIFFReadTile(tif, p2, col+img->col_offset,
row+img->row_offset,0,2)!=(tmsize_t)(-1) && img->stoponerr)
if (colorchannels > 1
&& TIFFReadTile(tif, p2, col+img->col_offset,
row+img->row_offset,0,2) != (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (alpha)
{
if (TIFFReadTile(tif,pa,col+img->col_offset,
row+img->row_offset,0,3)!=(tmsize_t)(-1) && img->stoponerr)
{
ret = 0;
break;
}
if (alpha
&& TIFFReadTile(tif,pa,col+img->col_offset,
row+img->row_offset,0,colorchannels) != (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif);
@ -893,7 +911,7 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
tmsize_t stripsize;
int32 fromskew, toskew;
int alpha = img->alpha;
int ret = 1, flip;
int ret = 1, flip, colorchannels;
stripsize = TIFFStripSize(tif);
p0 = buf = (unsigned char *)_TIFFmalloc((alpha?4:3)*stripsize);
@ -916,6 +934,20 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
toskew = -(int32)(w - w);
}
switch( img->photometric )
{
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_PALETTE:
colorchannels = 1;
p2 = p1 = p0;
break;
default:
colorchannels = 3;
break;
}
TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
scanline = TIFFScanlineSize(tif);
fromskew = (w < imagewidth ? imagewidth - w : 0);
@ -931,15 +963,17 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
ret = 0;
break;
}
if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 1),
p1, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)!=(tmsize_t)(-1)
if (colorchannels > 1
&& TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 1),
p1, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) != (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 2),
p2, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)!=(tmsize_t)(-1)
if (colorchannels > 1
&& TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 2),
p2, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) != (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
@ -947,7 +981,7 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
}
if (alpha)
{
if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 3),
if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, colorchannels),
pa, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)!=(tmsize_t)(-1)
&& img->stoponerr)
{
@ -2496,6 +2530,9 @@ PickSeparateCase(TIFFRGBAImage* img)
img->get = TIFFIsTiled(img->tif) ? gtTileSeparate : gtStripSeparate;
img->put.separate = NULL;
switch (img->photometric) {
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
/* greyscale images processed pretty much as RGB by gtTileSeparate */
case PHOTOMETRIC_RGB:
switch (img->bitspersample) {
case 8: