diff options
| -rw-r--r-- | src/3rdparty/libpng/pngrutil.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/3rdparty/libpng/pngrutil.c b/src/3rdparty/libpng/pngrutil.c index 07e46e2..daf3c5e 100644 --- a/src/3rdparty/libpng/pngrutil.c +++ b/src/3rdparty/libpng/pngrutil.c @@ -1037,12 +1037,14 @@ png_handle_cHRM(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) */ png_uint_32 w = y_red + y_green + y_blue; - png_ptr->rgb_to_gray_red_coeff = (png_uint_16)(((png_uint_32)y_red * - 32768)/w); - png_ptr->rgb_to_gray_green_coeff = (png_uint_16)(((png_uint_32)y_green - * 32768)/w); - png_ptr->rgb_to_gray_blue_coeff = (png_uint_16)(((png_uint_32)y_blue * - 32768)/w); + if (w != 0) { + png_ptr->rgb_to_gray_red_coeff = (png_uint_16)(((png_uint_32)y_red * + 32768)/w); + png_ptr->rgb_to_gray_green_coeff = (png_uint_16)(((png_uint_32)y_green + * 32768)/w); + png_ptr->rgb_to_gray_blue_coeff = (png_uint_16)(((png_uint_32)y_blue * + 32768)/w); + } } } #endif |