png_build_8bit_table 2761 3rdparty/libpng/png.c      png_build_8bit_table(png_ptr, &png_ptr->gamma_table,
png_build_8bit_table 2770 3rdparty/libpng/png.c         png_build_8bit_table(png_ptr, &png_ptr->gamma_to_1,
png_build_8bit_table 2773 3rdparty/libpng/png.c         png_build_8bit_table(png_ptr, &png_ptr->gamma_from_1,