cheng/libtiff
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
ChangeLog
View File

@ -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)

48
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",
"Sorry, can not handle contiguous data with %s=%d, "
"and %s=%d and Bits/Sample=%d",
photoTag, photometric,
"Samples/pixel", td->td_samplesperpixel);
"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",
"Sorry, can not handle contiguous data with %s=%d, "
"and %s=%d and Bits/Sample=%d",
photoTag, img->photometric,
"Samples/pixel", img->samplesperpixel);
"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;