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-/****************************************************************************
-**
-** Copyright (C) 2014 Gunnar Sletta <gunnar@sletta.org>
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** 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 https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-import QtQuick 2.0
-
-Item {
- id: root
- width: 480
- height: 320
-
- // The checkers background
- ShaderEffect {
- id: tileBackground
- anchors.fill: parent
-
- property real tileSize: 20
- property color color1: Qt.hsla(0, 0, 0.1);
- property color color2: Qt.hsla(0, 0, 0.2);
-
- property size pixelSize: Qt.size(width / tileSize, height / tileSize);
-
- fragmentShader:
- "
- uniform lowp vec4 color1;
- uniform lowp vec4 color2;
- uniform highp vec2 pixelSize;
- varying highp vec2 qt_TexCoord0;
- void main() {
- highp vec2 tc = sign(sin(3.14159265358979323846 * qt_TexCoord0 * pixelSize));
- if (tc.x != tc.y)
- gl_FragColor = color1;
- else
- gl_FragColor = color2;
- }
- "
- }
-
-//! [1]
- Rectangle {
- id: gradientRect;
- width: 10
- height: 10
- gradient: Gradient {
- GradientStop { position: 0; color: "white" }
- GradientStop { position: 1; color: "steelblue" }
- }
- visible: false; // should not be visible on screen.
- layer.enabled: true;
- layer.smooth: true
- }
-
- Text {
- id: textItem
- font.pixelSize: 48
- text: "Gradient Text"
- anchors.centerIn: parent
- layer.enabled: true
- // This item should be used as the 'mask'
- layer.samplerName: "maskSource"
- layer.effect: ShaderEffect {
- property var colorSource: gradientRect;
- fragmentShader: "
- uniform lowp sampler2D colorSource;
- uniform lowp sampler2D maskSource;
- uniform lowp float qt_Opacity;
- varying highp vec2 qt_TexCoord0;
- void main() {
- gl_FragColor =
- texture2D(colorSource, qt_TexCoord0)
- * texture2D(maskSource, qt_TexCoord0).a
- * qt_Opacity;
- }
- "
- }
- }
-//! [1]
-}