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[devel] Removed double increment of pointers in the accurate scaling.

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John Bowler 2011-06-18 13:25:46 -05:00 committed by Glenn Randers-Pehrson
parent 34f5449736
commit af96543688
1 changed files with 3 additions and 3 deletions
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6
pngrtran.c
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@ -1808,9 +1808,9 @@ png_do_chop(png_row_infop row_info, png_bytep row)
* later you will need to use the new png_set_scale_16_to_8()
* API to obtain accurate 16-to-8 scaling.
*/
png_int_32 tmp = *sp++; /* must be signed! */
tmp += (((int)*sp++ - tmp + 128) * 65535) >> 24;
*dp++ = (png_byte)tmp;
png_int_32 tmp = *sp; /* must be signed! */
tmp += (((int)sp[1] - tmp + 128) * 65535) >> 24;
*dp = (png_byte)tmp;
#else
/* Simply discard the low order byte */
*dp = *sp;