png_do_read_invert_alpha 1946 third_party/libpng/pngrtran.c png_do_read_invert_alpha(png_row_infop row_info, png_bytep row)
png_do_read_invert_alpha  187 third_party/libpng/pngusr.h #define png_do_read_invert_alpha        wk_png_do_read_invert_alpha