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Allow handling of images with extra samples that are to be ignored for

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contiguous 8bit greyscale and paletted images.
See bug http://bugzilla.remotesensing.org/show_bug.cgi?id=75
This commit is contained in:
Frank Warmerdam 2001-08-31 13:53:08 +00:00
parent abf486d1fa
commit d15abe6676
2 changed files with 46 additions and 14 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2001-08-31 Frank Warmerdam <warmerdam@pobox.com>
* libtiff/tif_getimage.c: relax handling of contig case where
there are extra samples that are supposed to be ignored. This
should now work for 8bit greyscale or palletted images.
http://bugzilla.remotesensing.org/show_bug.cgi?id=75
2001-08-28 Frank Warmerdam <warmerdam@pobox.com>
* libtiff/tif_getimage.c: Don't complain for CMYK (separated)

52
libtiff/tif_getimage.c
View File

@ -1,4 +1,4 @@
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_getimage.c,v 1.12 2001-08-28 13:11:38 warmerda Exp $ */
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_getimage.c,v 1.13 2001-08-31 13:53:08 warmerda Exp $ */
/*
* Copyright (c) 1991-1997 Sam Leffler
@ -82,13 +82,22 @@ TIFFRGBAImageOK(TIFF* tif, char emsg[1024])
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_PALETTE:
if (td->td_planarconfig == PLANARCONFIG_CONTIG && td->td_samplesperpixel != 1) {
if (td->td_planarconfig == PLANARCONFIG_CONTIG
&& td->td_samplesperpixel != 1
&& td->td_bitspersample < 8 ) {
sprintf(emsg,
"Sorry, can not handle contiguous data with %s=%d, and %s=%d",
photoTag, photometric,
"Samples/pixel", td->td_samplesperpixel);
"Sorry, can not handle contiguous data with %s=%d, "
"and %s=%d and Bits/Sample=%d",
photoTag, photometric,
"Samples/pixel", td->td_samplesperpixel,
td->td_bitspersample);
return (0);
}
/*
** We should likely validate that any extra samples are either
** to be ignored, or are alpha, and if alpha we should try to use
** them. But for now we won't bother with this.
*/
break;
case PHOTOMETRIC_YCBCR:
if (td->td_planarconfig != PLANARCONFIG_CONTIG) {
@ -261,11 +270,15 @@ TIFFRGBAImageBegin(TIFFRGBAImage* img, TIFF* tif, int stop, char emsg[1024])
/* fall thru... */
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
if (planarconfig == PLANARCONFIG_CONTIG && img->samplesperpixel != 1) {
if (planarconfig == PLANARCONFIG_CONTIG
&& img->samplesperpixel != 1
&& img->bitspersample < 8 ) {
sprintf(emsg,
"Sorry, can not handle contiguous data with %s=%d, and %s=%d",
photoTag, img->photometric,
"Samples/pixel", img->samplesperpixel);
"Sorry, can not handle contiguous data with %s=%d, "
"and %s=%d and Bits/Sample=%d",
photoTag, img->photometric,
"Samples/pixel", img->samplesperpixel,
img->bitspersample);
return (0);
}
break;
@ -789,10 +802,15 @@ static void name(\
DECLAREContigPutFunc(put8bitcmaptile)
{
uint32** PALmap = img->PALmap;
int samplesperpixel = img->samplesperpixel;
(void) x; (void) y;
(void) y;
while (h-- > 0) {
UNROLL8(w, NOP, *cp++ = PALmap[*pp++][0]);
for (x = w; x-- > 0;)
{
*cp++ = PALmap[*pp][0];
pp += samplesperpixel;
}
cp += toskew;
pp += fromskew;
}
@ -854,12 +872,16 @@ DECLAREContigPutFunc(put1bitcmaptile)
*/
DECLAREContigPutFunc(putgreytile)
{
int samplesperpixel = img->samplesperpixel;
uint32** BWmap = img->BWmap;
(void) y;
while (h-- > 0) {
for (x = w; x-- > 0;)
*cp++ = BWmap[*pp++][0];
{
*cp++ = BWmap[*pp][0];
pp += samplesperpixel;
}
cp += toskew;
pp += fromskew;
}
@ -870,6 +892,7 @@ DECLAREContigPutFunc(putgreytile)
*/
DECLAREContigPutFunc(put16bitbwtile)
{
int samplesperpixel = img->samplesperpixel;
uint32** BWmap = img->BWmap;
(void) y;
@ -880,8 +903,9 @@ DECLAREContigPutFunc(put16bitbwtile)
{
/* use high order byte of 16bit value */
*cp++ = BWmap[*(wp++) >> 8][0];
pp += 2;
*cp++ = BWmap[*wp >> 8][0];
pp += 2 * samplesperpixel;
wp += samplesperpixel;
}
cp += toskew;
pp += fromskew;