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July 2004
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2004.07.17 11:22 "possible bug in JPEGDecode", by Aleksandar Zivkovic
I tried to use libtiff with scanline-oriented interface (as described in
document Using the TIFF Library).
It seems it doesn't work . In my wrapper I'm using TIFFReadScanline
function.
It seems that the problem occures in JPEGDecode (OJPEGDecode) function.
TIFFjpeg_finish_decompress (TIFFojpeg_finish_decompress) is called even if a
strip (or tile) is not finished. I override this with a patch:
static int
OJPEGDecode(register TIFF *tif,tidata_t buf,tsize_t cc,tsample_t s)
{
.................................
/* AZ: Close down the decompressor if we've finished the strip or tile. */
if (sp->cinfo.d.output_scanline >= sp->cinfo.d.output_height) /* I
think we must check this first */
ERRCHK(TIFFojpeg_finish_decompress(sp,&ret)); /* AZ */
return sp->cinfo.d.output_scanline < sp->cinfo.d.output_height
|| ret;
................................................
}
, So have I found a bug, or maybe Im not using scanline interface properly?
Best Regards,
Alexandar
e-mail:
Aleksandar.Zivkovic@micronasnit.com