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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
VARYING vec2 center_vec;
void MAIN()
{
vec2 center_adj = vec2(center.x, 0.5 + (center.y - 0.5) * (-FRAMEBUFFER_Y_UP));
center_vec = INPUT_UV - center_adj;
// Multiply by x/y ratio to make the distortion round instead of an ellipse
center_vec.y *= INPUT_SIZE.y / INPUT_SIZE.x;
}