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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt scene graph research project.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
ShaderEffectItem
{
fragmentShader:
"varying highp vec2 qt_TexCoord; \n" +
"varying highp vec2 my_TexCoord1; \n" +
"varying highp vec2 my_TexCoord2; \n" +
"varying highp vec2 my_TexCoord3; \n" +
"varying highp vec2 my_TexCoord4; \n" +
"uniform sampler2D source; \n" +
"void main() { \n" +
" lowp vec4 pix = texture2D(source, qt_TexCoord); \n" +
" lowp float shadow = (texture2D(source, my_TexCoord1).w \n" +
" + texture2D(source, my_TexCoord2).w \n" +
" + texture2D(source, my_TexCoord3).w \n" +
" + texture2D(source, my_TexCoord4).w) * 0.1; \n" +
" gl_FragColor = mix(vec4(0, 0, 0, shadow), pix, pix.w); \n" +
"}"
vertexShader:
"attribute highp vec4 qt_Vertex; \n" +
"attribute highp vec2 qt_MultiTexCoord0; \n" +
"uniform highp mat4 qt_Matrix; \n" +
"uniform highp float xOffset; \n" +
"uniform highp float xDisplacement; \n" +
"uniform highp float yOffset; \n" +
"uniform highp float yDisplacement; \n" +
"varying highp vec2 qt_TexCoord; \n" +
"varying highp vec2 my_TexCoord1; \n" +
"varying highp vec2 my_TexCoord2; \n" +
"varying highp vec2 my_TexCoord3; \n" +
"varying highp vec2 my_TexCoord4; \n" +
"void main() { \n" +
" highp vec2 s1 = vec2(xOffset, yOffset); \n" +
" highp vec2 s2 = vec2(-xOffset, yOffset); \n" +
" qt_TexCoord = qt_MultiTexCoord0; \n" +
" vec2 shadowPos = qt_MultiTexCoord0 + vec2(-xDisplacement, yDisplacement); \n" +
" my_TexCoord1 = shadowPos + s1; \n" +
" my_TexCoord2 = shadowPos - s1; \n" +
" my_TexCoord3 = shadowPos + s2; \n" +
" my_TexCoord4 = shadowPos - s2; \n" +
" gl_Position = qt_Matrix * qt_Vertex; \n" +
"}"
property variant source;
property real xOffset: 0.66 / width;
property real yOffset: 0.66 / height;
property real xDisplacement: 10 / width;
property real yDisplacement: 12 / height;
property variant source
smooth: true
}
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