1197 png_set_compression_window_bits(png_structrp png_ptr, int window_bits)  in png_set_compression_window_bits()  argument
1208    if (window_bits > 15)  in png_set_compression_window_bits()
1211       window_bits = 15;  in png_set_compression_window_bits()
1214    else if (window_bits < 8)  in png_set_compression_window_bits()
1217       window_bits = 8;  in png_set_compression_window_bits()
1220    png_ptr->zlib_window_bits = window_bits;  in png_set_compression_window_bits()
1280 png_set_text_compression_window_bits(png_structrp png_ptr, int window_bits)  in png_set_text_compression_window_bits()  argument
1285    if (window_bits > 15)  in png_set_text_compression_window_bits()
1288       window_bits = 15;  in png_set_text_compression_window_bits()
1291    else if (window_bits < 8)  in png_set_text_compression_window_bits()
1294       window_bits = 8;  in png_set_text_compression_window_bits()
1297    png_ptr->zlib_text_window_bits = window_bits;  in png_set_text_compression_window_bits()