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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** 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 Nokia Corporation 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 1.0
import Qt.labs.shaders 1.0
Item {
id: main
property real blur: 0.0
property alias color: shadowEffectWithHBlur.color
property alias sourceItem: source.sourceItem
ShaderEffectSource {
id: source
smooth: true
hideSource: false
}
ShaderEffectItem {
id: shadowEffectWithHBlur
anchors.fill: parent
property color color: "grey"
property variant sourceTexture: source;
property real xStep: main.blur / main.width
vertexShader:"
uniform highp mat4 qt_ModelViewProjectionMatrix;
attribute highp vec4 qt_Vertex;
attribute highp vec2 qt_MultiTexCoord0;
uniform highp float xStep;
varying highp vec2 qt_TexCoord0;
varying highp vec2 qt_TexCoord1;
varying highp vec2 qt_TexCoord2;
varying highp vec2 qt_TexCoord4;
varying highp vec2 qt_TexCoord5;
varying highp vec2 qt_TexCoord6;
void main(void)
{
highp vec2 shift = vec2(xStep, 0.);
qt_TexCoord0 = qt_MultiTexCoord0 - 2.5 * shift;
qt_TexCoord1 = qt_MultiTexCoord0 - 1.5 * shift;
qt_TexCoord2 = qt_MultiTexCoord0 - 0.5 * shift;
qt_TexCoord4 = qt_MultiTexCoord0 + 0.5 * shift;
qt_TexCoord5 = qt_MultiTexCoord0 + 1.5 * shift;
qt_TexCoord6 = qt_MultiTexCoord0 + 2.5 * shift;
gl_Position = qt_ModelViewProjectionMatrix * qt_Vertex;
}
"
fragmentShader:"
uniform highp vec4 color;
uniform lowp sampler2D sourceTexture;
varying highp vec2 qt_TexCoord0;
varying highp vec2 qt_TexCoord1;
varying highp vec2 qt_TexCoord2;
varying highp vec2 qt_TexCoord4;
varying highp vec2 qt_TexCoord5;
varying highp vec2 qt_TexCoord6;
void main() {
highp vec4 sourceColor = (texture2D(sourceTexture, qt_TexCoord0) * 0.1
+ texture2D(sourceTexture, qt_TexCoord1) * 0.15
+ texture2D(sourceTexture, qt_TexCoord2) * 0.25
+ texture2D(sourceTexture, qt_TexCoord4) * 0.25
+ texture2D(sourceTexture, qt_TexCoord5) * 0.15
+ texture2D(sourceTexture, qt_TexCoord6) * 0.1);
gl_FragColor = mix(vec4(0), color, sourceColor.a);
}
"
}
ShaderEffectSource {
id: hBlurredShadow
smooth: true
sourceItem: shadowEffectWithHBlur
hideSource: true
}
ShaderEffectItem {
id: finalEffect
anchors.fill: parent
property color color: "grey"
property variant sourceTexture: hBlurredShadow;
property real yStep: main.blur / main.height
vertexShader:"
uniform highp mat4 qt_ModelViewProjectionMatrix;
attribute highp vec4 qt_Vertex;
attribute highp vec2 qt_MultiTexCoord0;
uniform highp float yStep;
varying highp vec2 qt_TexCoord0;
varying highp vec2 qt_TexCoord1;
varying highp vec2 qt_TexCoord2;
varying highp vec2 qt_TexCoord4;
varying highp vec2 qt_TexCoord5;
varying highp vec2 qt_TexCoord6;
void main(void)
{
highp vec2 shift = vec2(0., yStep);
qt_TexCoord0 = qt_MultiTexCoord0 - 2.5 * shift;
qt_TexCoord1 = qt_MultiTexCoord0 - 1.5 * shift;
qt_TexCoord2 = qt_MultiTexCoord0 - 0.5 * shift;
qt_TexCoord4 = qt_MultiTexCoord0 + 0.5 * shift;
qt_TexCoord5 = qt_MultiTexCoord0 + 1.5 * shift;
qt_TexCoord6 = qt_MultiTexCoord0 + 2.5 * shift;
gl_Position = qt_ModelViewProjectionMatrix * qt_Vertex;
}
"
fragmentShader:"
uniform highp vec4 color;
uniform lowp sampler2D sourceTexture;
uniform highp float qt_Opacity;
varying highp vec2 qt_TexCoord0;
varying highp vec2 qt_TexCoord1;
varying highp vec2 qt_TexCoord2;
varying highp vec2 qt_TexCoord4;
varying highp vec2 qt_TexCoord5;
varying highp vec2 qt_TexCoord6;
void main() {
highp vec4 sourceColor = (texture2D(sourceTexture, qt_TexCoord0) * 0.1
+ texture2D(sourceTexture, qt_TexCoord1) * 0.15
+ texture2D(sourceTexture, qt_TexCoord2) * 0.25
+ texture2D(sourceTexture, qt_TexCoord4) * 0.25
+ texture2D(sourceTexture, qt_TexCoord5) * 0.15
+ texture2D(sourceTexture, qt_TexCoord6) * 0.1);
gl_FragColor = sourceColor * qt_Opacity;
}
"
}
}
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