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++ // Copyright (C) 2023 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ VARYING vec4 TexCoordBLL;
++ VARYING vec4 TexCoordTLT;
++ VARYING vec4 TexCoordTRR;
++ VARYING vec4 TexCoordBRB;
++
++ void MAIN()
++ {
++ vec2 delta = vec2(1.0 / INPUT_SIZE.x, 1.0 / INPUT_SIZE.y);
++ TexCoordBLL = vec4(INPUT_UV.st, INPUT_UV.st) + vec4(-delta.xy, -delta.x, 0);
++ TexCoordTLT = vec4(INPUT_UV.st, INPUT_UV.st) + vec4(-delta.x, delta.y, 0, delta.y);
++ TexCoordTRR = vec4(INPUT_UV.st, INPUT_UV.st) + vec4(delta.xy, delta.x, 0);
++ TexCoordBRB = vec4(INPUT_UV.st, INPUT_UV.st) + vec4(delta.x, -delta.y, 0, -delta.y);
++ }