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[devel] Don't force 1, 2, and 4-bit depths to 8 when PNG_NO_16BIT is defined.

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This commit is contained in:
Glenn Randers-Pehrson 2010-08-27 10:48:45 -05:00
parent 8c69d7bc63
commit 4554a54a6c
1 changed files with 8 additions and 3 deletions
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11
pngrtran.c
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@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* Last changed in libpng 1.5.0 [August 26, 2010]
* Last changed in libpng 1.5.0 [August 27, 2010]
* Copyright (c) 1998-2010 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -1293,8 +1293,11 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->bit_depth = 8;
#else
/* Force chopping 16-bit input down to 8 */
png_ptr->transformations |=PNG_16_TO_8;
info_ptr->bit_depth = 8;
if (info_ptr->bit_depth == 16)
{
png_ptr->transformations |=PNG_16_TO_8;
info_ptr->bit_depth = 8;
}
#endif
#endif
@ -2109,7 +2112,9 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
png_uint_32 i;
png_uint_32 row_width = row_info->width;
#ifdef PNG_READ_16BIT_SUPPORTED
png_byte hi_filler = (png_byte)((filler>>8) & 0xff);
#endif
png_byte lo_filler = (png_byte)(filler & 0xff);
png_debug(1, "in png_do_read_filler");