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Diffstat (limited to 'basicsuite/qt5-everywhere/demos/shaders/shaders/posterize.fsh')
-rwxr-xr-x | basicsuite/qt5-everywhere/demos/shaders/shaders/posterize.fsh | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/basicsuite/qt5-everywhere/demos/shaders/shaders/posterize.fsh b/basicsuite/qt5-everywhere/demos/shaders/shaders/posterize.fsh new file mode 100755 index 0000000..e5c77ce --- /dev/null +++ b/basicsuite/qt5-everywhere/demos/shaders/shaders/posterize.fsh @@ -0,0 +1,68 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** 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, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// Based on http://www.geeks3d.com/20091027/shader-library-posterization-post-processing-effect-glsl/ + +uniform float dividerValue; +uniform float gamma; +uniform float numColors; + +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) { + vec3 x = texture2D(source, uv).rgb; + x = pow(x, vec3(gamma, gamma, gamma)); + x = x * numColors; + x = floor(x); + x = x / numColors; + x = pow(x, vec3(1.0/gamma)); + c = vec4(x, 1.0); + } else { + c = texture2D(source, uv); + } + gl_FragColor = qt_Opacity * c; +} |