main.qml Example File | Qt Quick 5.12.10

- Qt 5.12
- Qt Quick
- Scene Graph - Rendering FBOs in a thread
- main.qml Example File
- Qt 5.12.10 Reference Documentation

# main.qml Example File

scenegraph/textureinthread/main.qml

     /****************************************************************************
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     ** This file is part of the examples of the Qt Toolkit.
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     import QtQuick 2.0

     import SceneGraphRendering 1.0

     Item {
         width: 400
         height: 400

         // 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(3.14159265358979323846 * qt_TexCoord0 * pixelSize));
                     if (tc.x != tc.y)
                         gl_FragColor = color1;
                     else
                         gl_FragColor = color2;
                 }
                 "
         }

         Renderer {
             id: renderer
             anchors.fill: parent
             anchors.margins: 10

             // The transform is just to show something interesting..
             transform: [
                 Rotation { id: rotation; axis.x: 0; axis.z: 0; axis.y: 1; angle: 0; origin.x: renderer.width / 2; origin.y: renderer.height / 2; },
                 Translate { id: txOut; x: -renderer.width / 2; y: -renderer.height / 2 },
                 Scale { id: scale; },
                 Translate { id: txIn; x: renderer.width / 2; y: renderer.height / 2 }
             ]

             Behavior on opacity { NumberAnimation { duration: 500 } }
             opacity: 0
             Component.onCompleted: renderer.opacity = 1;
         }

         // Just to show something interesting
         SequentialAnimation {
             PauseAnimation { duration: 5000 }
             ParallelAnimation {
                 NumberAnimation { target: scale; property: "xScale"; to: 0.6; duration: 1000; easing.type: Easing.InOutBack }
                 NumberAnimation { target: scale; property: "yScale"; to: 0.6; duration: 1000; easing.type: Easing.InOutBack }
             }
             NumberAnimation { target: rotation; property: "angle"; to: 80; duration: 1000; easing.type: Easing.InOutCubic }
             NumberAnimation { target: rotation; property: "angle"; to: -80; duration: 1000; easing.type: Easing.InOutCubic }
             NumberAnimation { target: rotation; property: "angle"; to: 0; duration: 1000; easing.type: Easing.InOutCubic }
             NumberAnimation { target: renderer; property: "opacity"; to: 0.5; duration: 1000; easing.type: Easing.InOutCubic }
             PauseAnimation { duration: 1000 }
             NumberAnimation { target: renderer; property: "opacity"; to: 0.8; duration: 1000; easing.type: Easing.InOutCubic }
             ParallelAnimation {
                 NumberAnimation { target: scale; property: "xScale"; to: 1; duration: 1000; easing.type: Easing.InOutBack }
                 NumberAnimation { target: scale; property: "yScale"; to: 1; duration: 1000; easing.type: Easing.InOutBack }
             }
             running: true
             loops: Animation.Infinite
         }

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

         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 in a dedicated background thread. The background thread juggles two FBOs, one that is being rendered to and one for displaying. The texture to display is posted to the scene graph and displayed using a QSGSimpleTextureNode."
         }

     }