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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the Qt Mobility Components.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, 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 The Qt Company Ltd 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."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-// Based on "Graphics Shaders: Theory and Practice" (http://cgeducation.org/ShadersBook/)
-
-uniform float dividerValue;
-uniform float mixLevel;
-uniform float resS;
-uniform float resT;
-
-uniform sampler2D source;
-uniform lowp float qt_Opacity;
-varying vec2 qt_TexCoord0;
-
-void main()
-{
- vec2 uv = qt_TexCoord0.xy;
- vec4 c = vec4(0.0);
- if (uv.x < dividerValue) {
- vec2 st = qt_TexCoord0.st;
- vec3 irgb = texture2D(source, st).rgb;
- vec2 stp0 = vec2(1.0 / resS, 0.0);
- vec2 st0p = vec2(0.0 , 1.0 / resT);
- vec2 stpp = vec2(1.0 / resS, 1.0 / resT);
- vec2 stpm = vec2(1.0 / resS, -1.0 / resT);
- const vec3 W = vec3(0.2125, 0.7154, 0.0721);
- float i00 = dot(texture2D(source, st).rgb, W);
- float im1m1 = dot(texture2D(source, st-stpp).rgb, W);
- float ip1p1 = dot(texture2D(source, st+stpp).rgb, W);
- float im1p1 = dot(texture2D(source, st-stpm).rgb, W);
- float ip1m1 = dot(texture2D(source, st+stpm).rgb, W);
- float im10 = dot(texture2D(source, st-stp0).rgb, W);
- float ip10 = dot(texture2D(source, st+stp0).rgb, W);
- float i0m1 = dot(texture2D(source, st-st0p).rgb, W);
- float i0p1 = dot(texture2D(source, st+st0p).rgb, W);
- float h = -1.0*im1p1 - 2.0*i0p1 - 1.0*ip1p1 + 1.0*im1m1 + 2.0*i0m1 + 1.0*ip1m1;
- float v = -1.0*im1m1 - 2.0*im10 - 1.0*im1p1 + 1.0*ip1m1 + 2.0*ip10 + 1.0*ip1p1;
- float mag = 1.0 - length(vec2(h, v));
- vec3 target = vec3(mag, mag, mag);
- c = vec4(target, 1.0);
- } else {
- c = texture2D(source, qt_TexCoord0);
- }
- gl_FragColor = qt_Opacity * c;
-}