/usr/lib/x86_64-linux-gnu/qt5/qml/QtGraphicalEffects/private/FastMaskedBlur.qml is in qml-module-qtgraphicaleffects 5.5.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Graphical Effects module.
**
** $QT_BEGIN_LICENSE:BSD$
** 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
Item {
id: rootItem
property variant source
property variant maskSource
property real blur: 0.0
property bool transparentBorder: false
property bool cached: false
SourceProxy {
id: sourceProxy
input: rootItem.source
}
SourceProxy {
id: maskSourceProxy
input: rootItem.maskSource
}
ShaderEffectSource {
id: cacheItem
anchors.fill: shaderItem
visible: rootItem.cached
sourceItem: shaderItem
live: true
hideSource: visible
smooth: rootItem.blur > 0
}
property string __internalBlurVertexShader: "
attribute highp vec4 qt_Vertex;
attribute highp vec2 qt_MultiTexCoord0;
uniform highp mat4 qt_Matrix;
uniform highp float yStep;
uniform highp float xStep;
varying highp vec2 qt_TexCoord0;
varying highp vec2 qt_TexCoord1;
varying highp vec2 qt_TexCoord2;
varying highp vec2 qt_TexCoord3;
void main() {
qt_TexCoord0 = vec2(qt_MultiTexCoord0.x + xStep, qt_MultiTexCoord0.y + yStep * 0.36);
qt_TexCoord1 = vec2(qt_MultiTexCoord0.x + xStep * 0.36, qt_MultiTexCoord0.y - yStep);
qt_TexCoord2 = vec2(qt_MultiTexCoord0.x - xStep * 0.36, qt_MultiTexCoord0.y + yStep);
qt_TexCoord3 = vec2(qt_MultiTexCoord0.x - xStep, qt_MultiTexCoord0.y - yStep * 0.36);
gl_Position = qt_Matrix * qt_Vertex;
}
"
property string __internalBlurFragmentShader: "
uniform lowp sampler2D source;
uniform lowp float qt_Opacity;
varying highp vec2 qt_TexCoord0;
varying highp vec2 qt_TexCoord1;
varying highp vec2 qt_TexCoord2;
varying highp vec2 qt_TexCoord3;
void main() {
highp vec4 sourceColor = (texture2D(source, qt_TexCoord0) +
texture2D(source, qt_TexCoord1) +
texture2D(source, qt_TexCoord2) +
texture2D(source, qt_TexCoord3)) * 0.25;
gl_FragColor = sourceColor * qt_Opacity;
}
"
ShaderEffect {
id: mask0
property variant source: maskSourceProxy.output
anchors.fill: parent
visible: false
smooth: true
}
ShaderEffectSource {
id: masklevel1
width: Math.ceil(shaderItem.width / 32) * 32
height: Math.ceil(shaderItem.height / 32) * 32
sourceItem: mask0
hideSource: rootItem.visible
sourceRect: transparentBorder ? Qt.rect(-64, -64, shaderItem.width, shaderItem.height) : Qt.rect(0, 0, 0, 0)
visible: false
smooth: rootItem.blur > 0
}
ShaderEffect {
id: level0
property variant source: sourceProxy.output
anchors.fill: parent
visible: false
smooth: true
}
ShaderEffectSource {
id: level1
width: Math.ceil(shaderItem.width / 32) * 32
height: Math.ceil(shaderItem.height / 32) * 32
sourceItem: level0
hideSource: rootItem.visible
sourceRect: transparentBorder ? Qt.rect(-64, -64, shaderItem.width, shaderItem.height) : Qt.rect(0, 0, 0, 0)
visible: false
smooth: rootItem.blur > 0
}
ShaderEffect {
id: effect1
property variant source: level1
property real yStep: 1/height
property real xStep: 1/width
anchors.fill: level2
visible: false
smooth: true
vertexShader: __internalBlurVertexShader
fragmentShader: __internalBlurFragmentShader
}
ShaderEffectSource {
id: level2
width: level1.width / 2
height: level1.height / 2
sourceItem: effect1
hideSource: rootItem.visible
visible: false
smooth: true
}
ShaderEffect {
id: effect2
property variant source: level2
property real yStep: 1/height
property real xStep: 1/width
anchors.fill: level3
visible: false
smooth: true
vertexShader: __internalBlurVertexShader
fragmentShader: __internalBlurFragmentShader
}
ShaderEffectSource {
id: level3
width: level2.width / 2
height: level2.height / 2
sourceItem: effect2
hideSource: rootItem.visible
visible: false
smooth: true
}
ShaderEffect {
id: effect3
property variant source: level3
property real yStep: 1/height
property real xStep: 1/width
anchors.fill: level4
visible: false
smooth: true
vertexShader: __internalBlurVertexShader
fragmentShader: __internalBlurFragmentShader
}
ShaderEffectSource {
id: level4
width: level3.width / 2
height: level3.height / 2
sourceItem: effect3
hideSource: rootItem.visible
visible: false
smooth: true
}
ShaderEffect {
id: effect4
property variant source: level4
property real yStep: 1/height
property real xStep: 1/width
anchors.fill: level5
visible: false
smooth: true
vertexShader: __internalBlurVertexShader
fragmentShader: __internalBlurFragmentShader
}
ShaderEffectSource {
id: level5
width: level4.width / 2
height: level4.height / 2
sourceItem: effect4
hideSource: rootItem.visible
visible: false
smooth: true
}
ShaderEffect {
id: effect5
property variant source: level5
property real yStep: 1/height
property real xStep: 1/width
anchors.fill: level6
visible: false
smooth: true
vertexShader: __internalBlurVertexShader
fragmentShader: __internalBlurFragmentShader
}
ShaderEffectSource {
id: level6
width: level5.width / 2
height: level5.height / 2
sourceItem: effect5
hideSource: rootItem.visible
visible: false
smooth: true
}
ShaderEffect {
id: shaderItem
property variant mask: masklevel1
property variant source1: level1
property variant source2: level2
property variant source3: level3
property variant source4: level4
property variant source5: level5
property variant source6: level6
property real lod: Math.sqrt(rootItem.blur) * 1.2 - 0.2
property real weight1
property real weight2
property real weight3
property real weight4
property real weight5
property real weight6
x: transparentBorder ? -64 : 0
y: transparentBorder ? -64 : 0
width: transparentBorder ? parent.width + 128 : parent.width
height: transparentBorder ? parent.height + 128 : parent.height
fragmentShader: "
uniform lowp sampler2D mask;
uniform lowp sampler2D source1;
uniform lowp sampler2D source2;
uniform lowp sampler2D source3;
uniform lowp sampler2D source4;
uniform lowp sampler2D source5;
uniform lowp sampler2D source6;
uniform lowp float lod;
uniform lowp float qt_Opacity;
varying mediump vec2 qt_TexCoord0;
mediump float weight(mediump float v) {
if (v <= 0.0)
return 1.0;
if (v >= 0.5)
return 0.0;
return 1.0 - v * 2.0;
}
void main() {
lowp vec4 maskColor = texture2D(mask, qt_TexCoord0);
mediump float l = lod * maskColor.a;
mediump float w1 = weight(abs(l - 0.100));
mediump float w2 = weight(abs(l - 0.300));
mediump float w3 = weight(abs(l - 0.500));
mediump float w4 = weight(abs(l - 0.700));
mediump float w5 = weight(abs(l - 0.900));
mediump float w6 = weight(abs(l - 1.100));
mediump float sum = w1 + w2 + w3 + w4 + w5 + w6;
mediump float weight1 = w1 / sum;
mediump float weight2 = w2 / sum;
mediump float weight3 = w3 / sum;
mediump float weight4 = w4 / sum;
mediump float weight5 = w5 / sum;
mediump float weight6 = w6 / sum;
lowp vec4 sourceColor = texture2D(source1, qt_TexCoord0) * weight1;
sourceColor += texture2D(source2, qt_TexCoord0) * weight2;
sourceColor += texture2D(source3, qt_TexCoord0) * weight3;
sourceColor += texture2D(source4, qt_TexCoord0) * weight4;
sourceColor += texture2D(source5, qt_TexCoord0) * weight5;
sourceColor += texture2D(source6, qt_TexCoord0) * weight6;
gl_FragColor = sourceColor * qt_Opacity;
}
"
}
}
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