png_do_unshift   1685 third_party/libpng/pngrtran.c png_do_unshift(png_row_infop row_info, png_bytep row, png_color_8p sig_bits)
png_do_unshift    195 third_party/libpng/pngusr.h #define png_do_unshift                  wk_png_do_unshift