compat-libtiff3/SOURCES/libtiff-scanlinesize.patch
2021-10-08 10:10:48 +00:00

73 lines
2.6 KiB
Diff

Partial fix for issues filed upstream at
http://bugzilla.maptools.org/show_bug.cgi?id=2140
This stops the tiffcmp core dump noted in bug #460322, but isn't enough
to make tiffcmp return the right answer (it emits a bunch of error
messages instead).
diff -Naur tiff-3.9.2.orig/libtiff/tif_jpeg.c tiff-3.9.2/libtiff/tif_jpeg.c
--- tiff-3.9.2.orig/libtiff/tif_jpeg.c 2009-08-30 12:21:46.000000000 -0400
+++ tiff-3.9.2/libtiff/tif_jpeg.c 2010-01-05 22:40:40.000000000 -0500
@@ -988,8 +988,15 @@
tsize_t nrows;
(void) s;
- /* data is expected to be read in multiples of a scanline */
- if ( (nrows = sp->cinfo.d.image_height) ) {
+ nrows = cc / sp->bytesperline;
+ if (cc % sp->bytesperline)
+ TIFFWarningExt(tif->tif_clientdata, tif->tif_name, "fractional scanline not read");
+
+ if( nrows > (int) sp->cinfo.d.image_height )
+ nrows = sp->cinfo.d.image_height;
+
+ /* data is expected to be read in multiples of a scanline */
+ if (nrows) {
/* Cb,Cr both have sampling factors 1, so this is correct */
JDIMENSION clumps_per_line = sp->cinfo.d.comp_info[1].downsampled_width;
int samples_per_clump = sp->samplesperclump;
@@ -1087,8 +1094,7 @@
* TODO: resolve this */
buf += sp->bytesperline;
cc -= sp->bytesperline;
- nrows -= sp->v_sampling;
- } while (nrows > 0);
+ } while (--nrows > 0);
#ifdef JPEG_LIB_MK1
_TIFFfree(tmpbuf);
diff -Naur tiff-3.9.2.orig/libtiff/tif_strip.c tiff-3.9.2/libtiff/tif_strip.c
--- tiff-3.9.2.orig/libtiff/tif_strip.c 2006-03-25 13:04:35.000000000 -0500
+++ tiff-3.9.2/libtiff/tif_strip.c 2010-01-05 21:39:20.000000000 -0500
@@ -238,23 +238,19 @@
ycbcrsubsampling + 0,
ycbcrsubsampling + 1);
- if (ycbcrsubsampling[0] == 0) {
+ if (ycbcrsubsampling[0]*ycbcrsubsampling[1] == 0) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Invalid YCbCr subsampling");
return 0;
}
- scanline = TIFFroundup(td->td_imagewidth,
+ /* number of sample clumps per line */
+ scanline = TIFFhowmany(td->td_imagewidth,
ycbcrsubsampling[0]);
- scanline = TIFFhowmany8(multiply(tif, scanline,
- td->td_bitspersample,
- "TIFFScanlineSize"));
- return ((tsize_t)
- summarize(tif, scanline,
- multiply(tif, 2,
- scanline / ycbcrsubsampling[0],
- "TIFFVStripSize"),
- "TIFFVStripSize"));
+ /* number of samples per line */
+ scanline = multiply(tif, scanline,
+ ycbcrsubsampling[0]*ycbcrsubsampling[1] + 2,
+ "TIFFScanlineSize");
} else {
scanline = multiply(tif, td->td_imagewidth,
td->td_samplesperpixel,