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++ // Copyright (C) 2026 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ // Augment shader for the AddDefine test.
++ // When AddDefine { name: "MY_DEFINE"; value: 1 } is present in the render pass
++ // commands, the compiler sees "#define MY_DEFINE 1" and the shader outputs green.
++ // When the define is absent the shader outputs red.
++ // This makes it possible to visually verify that AddDefine actually injects
++ // preprocessor definitions into the augment shader.
++
++ void MAIN_FRAGMENT_AUGMENT()
++ {
++ #ifdef MY_DEFINE
++ fragOutput = vec4(0.0, 1.0, 0.0, 1.0); // green: MY_DEFINE was injected
++ #else
++ fragOutput = vec4(1.0, 0.0, 0.0, 1.0); // red: MY_DEFINE was NOT injected
++ #endif
++ }