png_set_write_status_fn 437 third_party/libpng/pngusr.h #define png_set_write_status_fn wk_png_set_write_status_fn png_set_write_status_fn 1486 third_party/libpng/pngwrite.c png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)