png_write_hIST 3308 third_party/libpng/png.h PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, png_write_hIST 177 third_party/libpng/pngwrite.c png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette);