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-/****************************************************************************
-**
-** 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.
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-import QtQuick 2.0
-
-Effect {
- parameters: ListModel {
- ListElement {
- name: "threshold"
- value: 0.5
- }
- }
-
- // Transform slider values, and bind result to shader uniforms
- property real weight: parameters.get(0).value
-
- fragmentShaderSrc: "#version 130
- uniform sampler2D source;
- uniform float dividerValue;
- uniform float weight;
- mat3 G[2] = mat3[](
- mat3( 1.0, 2.0, 1.0, 0.0, 0.0, 0.0, -1.0, -2.0, -1.0 ),
- mat3( 1.0, 0.0, -1.0, 2.0, 0.0, -2.0, 1.0, 0.0, -1.0 )
- );
- uniform lowp float qt_Opacity;
- in vec2 qt_TexCoord0;
- out vec4 FragmentColor;
- void main() {
- vec2 uv = qt_TexCoord0.xy;
- vec4 c = vec4(0.0);
- if (uv.x < dividerValue) {
- mat3 intensity;
- float conv[2];
- vec3 sample;
- for (int i=0; i<3; ++i) {
- for (int j=0; j<3; ++j) {
- sample = texelFetch(source, ivec2(gl_FragCoord) + ivec2(i-1, j-1), 0).rgb;
- intensity[i][j] = length(sample) * weight;
- }
- }
- for (int i=0; i<2; ++i) {
- float dp3 = dot(G[i][0], intensity[0]) + dot(G[i][1], intensity[1]) + dot(G[i][2], intensity[2]);
- conv[i] = dp3 * dp3;
- }
- c = vec4(0.5 * sqrt(conv[0]*conv[0] + conv[1]*conv[1]));
- } else {
- c = texture2D(source, qt_TexCoord0);
- }
- FragmentColor = qt_Opacity * c;
- }"
-}