febe398400
Based on code imported from master branch of QtMobility repo, ported to Qt Quick 2. Task-number: QTBUG-23118 Change-Id: Ifd297de0e595c675ff1a8e3218d91b03629295b9 Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com> Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
78 lines
2.8 KiB
GLSL
78 lines
2.8 KiB
GLSL
/****************************************************************************
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**
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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// Based on http://rastergrid.com/blog/downloads/frei-chen-edge-detector/
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#version 130
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uniform sampler2D source;
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uniform float dividerValue;
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uniform float weight;
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mat3 G[2] = mat3[](
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mat3( 1.0, 2.0, 1.0, 0.0, 0.0, 0.0, -1.0, -2.0, -1.0 ),
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mat3( 1.0, 0.0, -1.0, 2.0, 0.0, -2.0, 1.0, 0.0, -1.0 )
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);
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uniform lowp float qt_Opacity;
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in vec2 qt_TexCoord0;
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out vec4 FragmentColor;
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void main() {
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vec2 uv = qt_TexCoord0.xy;
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vec4 c = vec4(0.0);
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if (uv.x < dividerValue) {
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mat3 intensity;
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float conv[2];
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vec3 sample;
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for (int i=0; i<3; ++i) {
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for (int j=0; j<3; ++j) {
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sample = texelFetch(source, ivec2(gl_FragCoord) + ivec2(i-1, j-1), 0).rgb;
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intensity[i][j] = length(sample) * weight;
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}
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}
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for (int i=0; i<2; ++i) {
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float dp3 = dot(G[i][0], intensity[0]) + dot(G[i][1], intensity[1]) + dot(G[i][2], intensity[2]);
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conv[i] = dp3 * dp3;
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}
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c = vec4(0.5 * sqrt(conv[0]*conv[0] + conv[1]*conv[1]));
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} else {
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c = texture2D(source, qt_TexCoord0);
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}
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FragmentColor = qt_Opacity * c;
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}
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