tester.add_input(data, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_sRGB);
tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);
tester.add_input(data, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, COLORSPACE_sRGB, GAMMA_sRGB);
tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_LINEAR);