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++ // Copyright (C) 2023 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ VARYING vec2 center_vec;
++
++ void MAIN()
++ {
++ center_vec = INPUT_UV - vec2(0.5, 0.5);
++ center_vec.y *= INPUT_SIZE.y / INPUT_SIZE.x;
++ }