compare_read 1339 contrib/libtests/pngimage.c if (!compare_read(dp, 0/*transforms applied*/)) compare_read 1351 contrib/libtests/pngimage.c if (!compare_read(dp, 0/*transforms applied*/)) compare_read 1399 contrib/libtests/pngimage.c if (!compare_read(dp, current/*for the SHIFT/sBIT transform*/))