diff options
Diffstat (limited to 'Build/source/libs/libpng/libpng-src/pngget.c')
| -rw-r--r-- | Build/source/libs/libpng/libpng-src/pngget.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/Build/source/libs/libpng/libpng-src/pngget.c b/Build/source/libs/libpng/libpng-src/pngget.c index e44933c0d2c..1490a032e1a 100644 --- a/Build/source/libs/libpng/libpng-src/pngget.c +++ b/Build/source/libs/libpng/libpng-src/pngget.c @@ -1,7 +1,7 @@ /* pngget.c - retrieval of values from info struct * - * Copyright (c) 2018 Cosmin Truta + * Copyright (c) 2018-2023 Cosmin Truta * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson * Copyright (c) 1996-1997 Andreas Dilger * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. @@ -21,7 +21,18 @@ png_get_valid(png_const_structrp png_ptr, png_const_inforp info_ptr, png_uint_32 flag) { if (png_ptr != NULL && info_ptr != NULL) + { +#ifdef PNG_READ_tRNS_SUPPORTED + /* png_handle_PLTE() may have canceled a valid tRNS chunk but left the + * 'valid' flag for the detection of duplicate chunks. Do not report a + * valid tRNS chunk in this case. + */ + if (flag == PNG_INFO_tRNS && png_ptr->num_trans == 0) + return(0); +#endif + return(info_ptr->valid & flag); + } return(0); } |