From 792602c8aaf387556c0035fc894493a20699c7e8 Mon Sep 17 00:00:00 2001
From: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Date: Wed, 29 May 2013 16:24:12 +0200
Subject: Experimental android version of Qt 5 intro

Change-Id: I48041fc2abcf7d46943b5362cf84545e49d8889c
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
---
 experimental/qt5-intro-android/NoisyGradient.qml | 92 ++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 experimental/qt5-intro-android/NoisyGradient.qml

(limited to 'experimental/qt5-intro-android/NoisyGradient.qml')

diff --git a/experimental/qt5-intro-android/NoisyGradient.qml b/experimental/qt5-intro-android/NoisyGradient.qml
new file mode 100644
index 0000000..904f14e
--- /dev/null
+++ b/experimental/qt5-intro-android/NoisyGradient.qml
@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt 5 launch demo.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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
+** 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
+
+ShaderEffect {
+
+    id: effectRoot;
+
+    width: 1280
+    height: 720
+
+    property Gradient gradient: Gradient {
+        GradientStop { position: 0; color: "white" }
+        GradientStop { position: 0.4; color: "blue" }
+        GradientStop { position: 1.0; color: "black" }
+    }
+
+    Rectangle {
+        id: colorTable
+        width: 1
+        height: 128;
+
+        gradient: effectRoot.gradient;
+
+        layer.enabled: true
+        layer.smooth: true
+
+        visible: false;
+    }
+
+    property variant source: colorTable;
+
+    blending: false;
+
+    fragmentShader:"
+                #ifdef GL_ES
+                precision lowp float;
+                #endif
+
+                uniform lowp sampler2D source;
+                uniform lowp float qt_Opacity;
+                varying highp vec2 qt_TexCoord0;
+
+                // Noise function from: http://stackoverflow.com/questions/4200224/random-noise-functions-for-glsl
+                float rand(vec2 n) {
+                    return 0.5 + 0.5 * fract(sin(dot(n.xy, vec2(12.9898, 78.233))) * 43758.5453);
+                }
+
+                void main() {
+                    lowp float len = clamp(length(vec2(0.5, 0.0) - qt_TexCoord0), 0.0, 1.0);
+                    gl_FragColor = texture2D(source, vec2(0, len)) * qt_Opacity + rand(qt_TexCoord0) * 0.05;
+                }
+"
+}
-- 
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