png_write_png    1274 contrib/libtests/pngimage.c    png_write_png(dp->write_pp, ip, transforms, NULL/*params*/);
png_write_png     831 example.c         png_write_png(png_ptr, info_ptr, png_transforms, NULL);
png_write_png    2471 png.h          PNG_EXPORT(179, void, png_write_png, (png_structrp png_ptr, png_inforp info_ptr,