/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QML Shaders plugin of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
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import QtQuick 1.0
import Qt.labs.shaders 1.0

Rectangle {
    anchors.fill: parent;
    color: "black"

    Rectangle {
        id: rect;
        anchors.centerIn: parent
        width: 1
        height: 10

        gradient: Gradient {
            GradientStop { position: 0; color: "#ff0000" }
            GradientStop { position: 0.5; color: "#00ff00" }
            GradientStop { position: 1; color: "#0000ff" }
        }
    }

    Text {
        id: text
        anchors.centerIn: parent
        font.pixelSize:  80
        text: "Shaderz!"
    }

    ShaderEffectSource {
        id: maskSource
        sourceItem: text
        hideSource: true
    }

    ShaderEffectSource {
        id: colorSource
        sourceItem: rect;
        hideSource: true
    }

    ShaderEffectItem {
        anchors.fill: text;

        property variant colorSource: colorSource
        property variant maskSource: maskSource;

        fragmentShader: "
        uniform lowp sampler2D maskSource;
        uniform lowp sampler2D colorSource;
        varying highp vec2 qt_TexCoord0;
        void main() {
            gl_FragColor = texture2D(maskSource, qt_TexCoord0).a * texture2D(colorSource, qt_TexCoord0.yx);
        }
        "
    }
}