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Diffstat (limited to 'basicsuite/Media Player/Effects/EffectMagnify.qml')
-rwxr-xr-x | basicsuite/Media Player/Effects/EffectMagnify.qml | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/basicsuite/Media Player/Effects/EffectMagnify.qml b/basicsuite/Media Player/Effects/EffectMagnify.qml new file mode 100755 index 0000000..01f33a5 --- /dev/null +++ b/basicsuite/Media Player/Effects/EffectMagnify.qml @@ -0,0 +1,117 @@ +/**************************************************************************** +** +** 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 { + id: root + divider: false + parameters: ListModel { + ListElement { + name: "radius" + value: 0.5 + } + ListElement { + name: "diffraction" + value: 0.5 + } + } + + property real posX: -1 + property real posY: -1 + + QtObject { + id: d + property real oldTargetWidth: root.targetWidth + property real oldTargetHeight: root.targetHeight + } + + // Transform slider values, and bind result to shader uniforms + property real radius: parameters.get(0).value * 100 + property real diffractionIndex: parameters.get(1).value + + onTargetWidthChanged: { + if (posX == -1) + posX = targetWidth / 2 + else if (d.oldTargetWidth != 0) + posX *= (targetWidth / d.oldTargetWidth) + d.oldTargetWidth = targetWidth + } + + onTargetHeightChanged: { + if (posY == -1) + posY = targetHeight / 2 + else if (d.oldTargetHeight != 0) + posY *= (targetHeight / d.oldTargetHeight) + d.oldTargetHeight = targetHeight + } + + fragmentShaderSrc: "uniform sampler2D source; + uniform lowp float qt_Opacity; + varying vec2 qt_TexCoord0; + uniform float radius; + uniform float diffractionIndex; + uniform float targetWidth; + uniform float targetHeight; + uniform float posX; + uniform float posY; + + void main() + { + vec2 tc = qt_TexCoord0; + vec2 center = vec2(posX, posY); + vec2 xy = gl_FragCoord.xy - center.xy; + float r = sqrt(xy.x * xy.x + xy.y * xy.y); + if (r < radius) { + float h = diffractionIndex * 0.5 * radius; + vec2 new_xy = r < radius ? xy * (radius - h) / sqrt(radius * radius - r * r) : xy; + vec2 targetSize = vec2(targetWidth, targetHeight); + tc = (new_xy + center) / targetSize; + tc.y = 1.0 - tc.y; + } + gl_FragColor = qt_Opacity * texture2D(source, tc); + }" + + MouseArea { + anchors.fill: parent + onPositionChanged: { root.posX = mouse.x; root.posY = root.targetHeight - mouse.y } + } +} |