main.qml Example File | Qt Quick 5.12.10

- Qt 5.12
- Qt Quick
- Scene Graph - Two Texture Providers
- main.qml Example File
- Qt 5.12.10 Reference Documentation

# main.qml Example File

scenegraph/twotextureproviders/main.qml

     /****************************************************************************
     **
     ** Copyright (C) 2014 Gunnar Sletta <gunnar@sletta.org>
     ** Contact: https://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
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     ** modification, are permitted provided that the following conditions are
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     import QtQuick 2.2
     import SceneGraphRendering 1.0

     Item {
         id: root

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

             property real tileSize: 16
             property color color1: Qt.rgba(0.9, 0.9, 0.9, 1);
             property color color2: Qt.rgba(0.8, 0.8, 0.8, 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(3.14159265358979323846 * qt_TexCoord0 * pixelSize));
                 if (tc.x != tc.y)
                     gl_FragColor = color1;
                 else
                     gl_FragColor = color2;
             }
             "
         }

         width: 320
         height: 480

         Item {
             id: box
             width: root.width * 0.9
             height: width

             Rectangle {
                 anchors.centerIn: parent
                 width: parent.width * 0.9
                 height: parent.width * 0.4
                 radius: width * 0.1;
                 gradient: Gradient {
                     GradientStop { position: 0; color: Qt.hsla(0.6, 0.9, 0.9, 1); }
                     GradientStop { position: 1; color: Qt.hsla(0.6, 0.6, 0.3, 1); }
                 }
                 RotationAnimator on rotation { from: 0; to: 360; duration: 10000; loops: Animation.Infinite }
             }

             visible: false
             layer.enabled: true
         }

         Item {
             id: text
             width: box.width
             height: width
             Text {
                 anchors.centerIn: parent
                 color: "black" // Qt.hsla(0.8, 0.8, 0.8);
                 text: "Qt\nQuick"

                 horizontalAlignment: Text.AlignHCenter

                 font.bold: true
                 font.pixelSize: text.width * 0.25
                 RotationAnimator on rotation { from: 360; to: 0; duration: 9000; loops: Animation.Infinite }
             }
             visible: false
             layer.enabled: true
         }

         XorBlender {
             anchors.horizontalCenter: parent.horizontalCenter
             y: root.height * 0.05;
             width: box.width
             height: box.height
             source1: box
             source2: text
         }

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

         Text {
             id: description
             anchors.left: parent.left
             anchors.right: parent.right
             anchors.bottom: parent.bottom
             anchors.margins: 20
             wrapMode: Text.WordWrap
             text: "This example creates two animated items and sets 'layer.enabled: true' on both of them. " +
                   "This turns the items into texture providers and we can access their texture from C++ in a custom material. " +
                   "The XorBlender is a custom C++ item which uses performs an Xor blend between them."
         }
     }