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-
- A couple of routines used for working out the size of tiles and strips
- don't work for YCbCr if extra samples are present. The mods are only
- trivial, and apologies if it's already been fixed. I'm currently
- using:
- VERSION 3.3beta
- tiff.alpha define ALPHA 015
-
- The mods are to tif_strip.c and tif_tile.c:
-
- diff -c OLD/tif_strip.c NEW/tif_strip.c
- *** OLD/tif_strip.c Tue Oct 11 17:37:30 1994
- --- NEW/tif_strip.c Fri Dec 9 13:59:51 1994
- ***************
- *** 98,104 ****
- td->td_ycbcrsubsampling[0]*td->td_ycbcrsubsampling[1];
- nrows = roundup(nrows, td->td_ycbcrsubsampling[1]);
- /* NB: don't need howmany here 'cuz everything is rounded */
- ! return (nrows*scanline + 2*(nrows*scanline / samplingarea));
- } else
- #endif
- return (nrows * TIFFScanlineSize(tif));
- --- 98,104 ----
- td->td_ycbcrsubsampling[0]*td->td_ycbcrsubsampling[1];
- nrows = roundup(nrows, td->td_ycbcrsubsampling[1]);
- /* NB: don't need howmany here 'cuz everything is rounded */
- ! return (nrows*scanline*(td->td_samplesperpixel-2) + 2*(nrows*scanline / samplingarea));
- } else
- #endif
- return (nrows * TIFFScanlineSize(tif));
-
-
-
-
- diff -c OLD/tif_tile.c NEW/tif_tile.c
- *** OLD/tif_tile.c Mon Dec 5 10:46:22 1994
- --- NEW/tif_tile.c Fri Dec 9 13:59:53 1994
- ***************
- *** 175,181 ****
- td->td_ycbcrsubsampling[0]*td->td_ycbcrsubsampling[1];
- nrows = roundup(nrows, td->td_ycbcrsubsampling[1]);
- /* NB: don't need howmany here 'cuz everything is rounded */
- ! tilesize = nrows*rowsize + 2*(nrows*rowsize / samplingarea);
- } else
- #endif
- tilesize = nrows * TIFFTileRowSize(tif);
- --- 175,182 ----
- td->td_ycbcrsubsampling[0]*td->td_ycbcrsubsampling[1];
- nrows = roundup(nrows, td->td_ycbcrsubsampling[1]);
- /* NB: don't need howmany here 'cuz everything is rounded */
- ! tilesize = nrows*rowsize*(td->td_samplesperpixel-2)
- ! + 2*(nrows*rowsize / samplingarea);
- } else
- #endif
- tilesize = nrows * TIFFTileRowSize(tif);
-
-
-
- - gordon
- ---
- Never keep a dog and bark for yourself. -- harrison
- Gordon Clare Net: gordon@research.canon.oz.au
- Canon Information Systems Research Australia Ph: +61 2 805 2738
- P.O. Box 313 North Ryde, NSW, Australia 2113 Fax: +61 2 805 2929
-
-