png_read_info    1108 3rdparty/libpng/png.h PNG_EXPORT(22, void, png_read_info,
png_read_info    1134 3rdparty/libpng/pngread.c    png_read_info(png_ptr, info_ptr);
png_read_info     178 modules/imgcodecs/src/grfmt_png.cpp                     png_read_info( png_ptr, info_ptr );