/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the test suite of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL21$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see http://www.qt.io/terms-conditions. For further ** information use the contact form at http://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 or version 3 as published by the Free ** Software Foundation and appearing in the file LICENSE.LGPLv21 and ** LICENSE.LGPLv3 included in the packaging of this file. Please review the ** following information to ensure the GNU Lesser General Public License ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** As a special exception, The Qt Company gives you certain additional ** rights. These rights are described in The Qt Company LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ import QtQuick 1.0 import Qt.labs.shaders 1.0 Rectangle { anchors.fill: parent; color: "green" Timer { running: true interval: 2000 repeat: true onTriggered: { //theSource.hideOriginal = !theSource.hideOriginal theSource.hideSource = !theSource.hideSource } } Rectangle { id: redRect anchors.fill: parent; color: "red" } ShaderEffectSource { id: theSource sourceItem: redRect } ShaderEffectItem { id: effect anchors.fill: parent; property variant source: theSource fragmentShader: " varying highp vec2 qt_TexCoord0; uniform sampler2D source; void main() { // Empty fragmentshader, we do not write any pixels via this effect item. We only observe hideoriginal functionality. } " } Rectangle { width: parent.width height: 40 color: "#cc000000" Text { id: label anchors.centerIn: parent //text: theSource.hideOriginal ? "Hideoriginal true (display should be green)" : "Hideoriginal false (display should be red)" text: theSource.hideSource ? "HideSource true (display should be green)" : "HideSource false (display should be red)" color: "white" font.bold: true } } }