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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
void MAIN()
{
vec2 uv = useUV1 ? UV1 : UV0;
float u = uv.x * 2.0 - 1.0;
float v = uv.y * 2.0 - 1.0;
// For D3D, GL, Metal. Not for Vulkan.
if (FRAMEBUFFER_Y_UP != NDC_Y_UP)
v *= -1.0;
POSITION = vec4(u, v, 0.0, 1.0);
}