Does this sample really upscale?

[tingxingdong]

I check the source code. The sharpen-only and casUpsample use the exact same shader and parameters in file: https://github.com/GPUOpen-Effects/FidelityFX-CAS/blob/master/sample/src/VK/CAS_CS.cpp

        m_casSharpenOnly.OnCreate(pDevice, "CAS_Shader.glsl", "main", m_upscaleDescriptorSetLayout, 64, 1, 1, &defines);


        m_casUpsample.OnCreate(pDevice, "CAS_Shader.glsl", "main", m_upscaleDescriptorSetLayout, 64, 1, 1, &defines);

[tingxingdong]

should use "git submodule update --init --recursive"