399500f87e
Change-Id: Ia8c1c38aba1544603fada8c414cc856f365fd15b Reviewed-by: Akseli Salovaara <akseli.salovaara@digia.com> Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
84 lines
3.5 KiB
GLSL
84 lines
3.5 KiB
GLSL
/****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: 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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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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 "Graphics Shaders: Theory and Practice" (http://cgeducation.org/ShadersBook/)
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uniform float dividerValue;
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uniform float mixLevel;
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uniform float resS;
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uniform float resT;
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uniform sampler2D source;
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uniform lowp float qt_Opacity;
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varying vec2 qt_TexCoord0;
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void main()
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{
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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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vec2 st = qt_TexCoord0.st;
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vec3 irgb = texture2D(source, st).rgb;
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vec2 stp0 = vec2(1.0 / resS, 0.0);
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vec2 st0p = vec2(0.0 , 1.0 / resT);
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vec2 stpp = vec2(1.0 / resS, 1.0 / resT);
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vec2 stpm = vec2(1.0 / resS, -1.0 / resT);
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const vec3 W = vec3(0.2125, 0.7154, 0.0721);
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float i00 = dot(texture2D(source, st).rgb, W);
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float im1m1 = dot(texture2D(source, st-stpp).rgb, W);
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float ip1p1 = dot(texture2D(source, st+stpp).rgb, W);
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float im1p1 = dot(texture2D(source, st-stpm).rgb, W);
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float ip1m1 = dot(texture2D(source, st+stpm).rgb, W);
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float im10 = dot(texture2D(source, st-stp0).rgb, W);
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float ip10 = dot(texture2D(source, st+stp0).rgb, W);
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float i0m1 = dot(texture2D(source, st-st0p).rgb, W);
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float i0p1 = dot(texture2D(source, st+st0p).rgb, W);
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float h = -1.0*im1p1 - 2.0*i0p1 - 1.0*ip1p1 + 1.0*im1m1 + 2.0*i0m1 + 1.0*ip1m1;
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float v = -1.0*im1m1 - 2.0*im10 - 1.0*im1p1 + 1.0*ip1m1 + 2.0*ip10 + 1.0*ip1p1;
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float mag = 1.0 - length(vec2(h, v));
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vec3 target = vec3(mag, mag, mag);
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c = vec4(target, 1.0);
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} else {
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c = texture2D(source, qt_TexCoord0);
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}
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gl_FragColor = qt_Opacity * c;
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}
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