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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 http://kodemongki.blogspot.com/2011/06/kameraku-custom-shader-effects-example.html
-
-uniform float targetHue;
-uniform float windowWidth;
-uniform float dividerValue;
-
-uniform sampler2D source;
-uniform lowp float qt_Opacity;
-varying vec2 qt_TexCoord0;
-
-void rgb2hsl(vec3 rgb, out float h, out float s, float l)
-{
- float maxval = max(rgb.r, max(rgb.g, rgb.b));
- float minval = min(rgb.r, min(rgb.g, rgb.b));
- float delta = maxval - minval;
- l = (minval + maxval) / 2.0;
- s = 0.0;
- if (l > 0.0 && l < 1.0)
- s = delta / (l < 0.5 ? 2.0 * l : 2.0 - 2.0 * l);
- h = 0.0;
- if (delta > 0.0)
- {
- if (rgb.r == maxval && rgb.g != maxval)
- h += (rgb.g - rgb.b ) / delta;
- if (rgb.g == maxval && rgb.b != maxval)
- h += 2.0 + (rgb.b - rgb.r) / delta;
- if (rgb.b == maxval && rgb.r != maxval)
- h += 4.0 + (rgb.r - rgb.g) / delta;
- h *= 60.0;
- }
-}
-
-void main()
-{
- vec2 uv = qt_TexCoord0.xy;
- vec3 col = texture2D(source, uv).rgb;
- float h, s, l;
- rgb2hsl(col, h, s, l);
- float h2 = (h > targetHue) ? h - 360.0 : h + 360.0;
- float y = 0.3 * col.r + 0.59 * col.g + 0.11 * col.b;
- vec3 result;
- if (uv.x > dividerValue || (abs(h - targetHue) < windowWidth) || (abs(h2 - targetHue) < windowWidth))
- result = col;
- else
- result = vec3(y, y, y);
- gl_FragColor = qt_Opacity * vec4(result, 1.0);
-}