diff options
Diffstat (limited to 'src/3rdparty/libpng/pngread.c')
| -rw-r--r-- | src/3rdparty/libpng/pngread.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/3rdparty/libpng/pngread.c b/src/3rdparty/libpng/pngread.c index e34ddd99a0..da32e9ad9c 100644 --- a/src/3rdparty/libpng/pngread.c +++ b/src/3rdparty/libpng/pngread.c @@ -1,7 +1,7 @@ /* pngread.c - read a PNG file * - * Last changed in libpng 1.6.32 [August 24, 2017] + * Last changed in libpng 1.6.33 [September 28, 2017] * Copyright (c) 1998-2002,2004,2006-2017 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.) @@ -3759,7 +3759,13 @@ png_image_read_direct(png_voidp argument) mode = PNG_ALPHA_PNG; output_gamma = PNG_DEFAULT_sRGB; } - + + if ((change & PNG_FORMAT_FLAG_ASSOCIATED_ALPHA) != 0) + { + mode = PNG_ALPHA_OPTIMIZED; + change &= ~PNG_FORMAT_FLAG_ASSOCIATED_ALPHA; + } + /* If 'do_local_background' is set check for the presence of gamma * correction; this is part of the work-round for the libpng bug * described above. @@ -3985,6 +3991,10 @@ png_image_read_direct(png_voidp argument) else if (do_local_compose != 0) /* internal error */ png_error(png_ptr, "png_image_read: alpha channel lost"); + if ((format & PNG_FORMAT_FLAG_ASSOCIATED_ALPHA) != 0) { + info_format |= PNG_FORMAT_FLAG_ASSOCIATED_ALPHA; + } + if (info_ptr->bit_depth == 16) info_format |= PNG_FORMAT_FLAG_LINEAR; |