/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 Digia Plc and its Subsidiary(-ies) 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
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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****************************************************************************/

import QtQuick 2.0

import ViewportItems 1.0

Item {
    id:root;
    width: 1024
    height: 600

    // The checkers background
    ShaderEffect {
        id: tileBackground
        anchors.fill: parent

        property real tileSize: 16
        property color color1: Qt.rgba(0.9, 0.9, 0.9, 1);
        property color color2: Qt.rgba(0.85, 0.85, 0.85, 1);

        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(3.14152 * qt_TexCoord0 * pixelSize));
                if (tc.x != tc.y)
                    gl_FragColor = color1;
                else
                    gl_FragColor = color2;
            }
            "
    }

    ShaderEffect {
//        width: 160
//        height: 160

        anchors.fill: parent

        property variant src: renderer

        property real amplitude: 0.04 + 0.5
        property real frequency: 20
        property real time: 0
        NumberAnimation on time { loops: Animation.Infinite; from: 0; to: Math.PI * 2; duration: 600 }
        fragmentShader:
            "uniform lowp float qt_Opacity;" +
            "uniform highp float amplitude;" +
            "uniform highp float frequency;" +
            "uniform highp float time;" +
            "uniform sampler2D source;" +
            "varying highp vec2 qt_TexCoord0;" +
            "void main() {" +
            "    highp vec2 p = sin(time + frequency * qt_TexCoord0);" +
            "    gl_FragColor = texture2D(source, qt_TexCoord0 + amplitude * vec2(p.y, -p.x)) * qt_Opacity;" +
            "}"
    }

    Image  {
        id: butts;
        x: 300;
        y: 50;
        width: 300;
        height: width;
        source: "/home/preet/mrsnrub.jpg"
    }

    Rectangle {
        id: labelFrame
        anchors.margins: -10
        radius: 5
        color: "white"
        border.color: "black"
        opacity: 0.8
        anchors.fill: label

//        RotationAnimation on rotation {
//            from: 0; to: 360; duration: 4000; loops: Animation.Infinite;
//        }
    }

    Text {
        id: label
        anchors.bottom: renderer.bottom
        anchors.left: renderer.left
        anchors.right: renderer.right
        anchors.margins: 20
        wrapMode: Text.WordWrap
        text: "The blue rectangle with the vintage 'Q' is an FBO, rendered by the application on the scene graph rendering thread. It is displayed using a QSGSimpleTextureNode."
    }


}