tester.add_input(data, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR, size, size);
Effect *slice_effect = tester.get_chain()->add_effect(new SliceEffect());
tester.add_input(data, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR, size, size);
Effect *slice_effect = tester.get_chain()->add_effect(new SliceEffect());