init
This commit is contained in:
Sven Riwoldt
@@ -0,0 +1,194 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** Copyright (C) 2017 The Qt Company Ltd.
|
||||
** Contact: https://www.qt.io/licensing/
|
||||
**
|
||||
** This file is part of the Qt Graphical Effects module.
|
||||
**
|
||||
** $QT_BEGIN_LICENSE:LGPL$
|
||||
** 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 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.
|
||||
**
|
||||
** GNU Lesser General Public License Usage
|
||||
** Alternatively, this file may be used under the terms of the GNU Lesser
|
||||
** General Public License version 3 as published by the Free Software
|
||||
** Foundation and appearing in the file LICENSE.LGPL3 included in the
|
||||
** packaging of this file. Please review the following information to
|
||||
** ensure the GNU Lesser General Public License version 3 requirements
|
||||
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
|
||||
**
|
||||
** GNU General Public License Usage
|
||||
** Alternatively, this file may be used under the terms of the GNU
|
||||
** General Public License version 2.0 or (at your option) the GNU General
|
||||
** Public license version 3 or any later version approved by the KDE Free
|
||||
** Qt Foundation. The licenses are as published by the Free Software
|
||||
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
|
||||
** included in the packaging of this file. Please review the following
|
||||
** information to ensure the GNU General Public License requirements will
|
||||
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
|
||||
** https://www.gnu.org/licenses/gpl-3.0.html.
|
||||
**
|
||||
** $QT_END_LICENSE$
|
||||
**
|
||||
****************************************************************************/
|
||||
|
||||
import QtQuick 2.12
|
||||
import QtGraphicalEffects.private 1.12
|
||||
|
||||
/*!
|
||||
\qmltype BrightnessContrast
|
||||
\inqmlmodule QtGraphicalEffects
|
||||
\since QtGraphicalEffects 1.0
|
||||
\inherits QtQuick2::Item
|
||||
\ingroup qtgraphicaleffects-color
|
||||
\brief Adjusts brightness and contrast.
|
||||
|
||||
This effect adjusts the source item colors.
|
||||
Brightness adjustment changes the perceived luminance of the source item.
|
||||
Contrast adjustment increases or decreases the color
|
||||
and brightness variations.
|
||||
|
||||
\table
|
||||
\header
|
||||
\li Source
|
||||
\li Effect applied
|
||||
\row
|
||||
\li \image Original_bug.png
|
||||
\li \image BrightnessContrast_bug.png
|
||||
\endtable
|
||||
|
||||
\note This effect is available when running with OpenGL.
|
||||
|
||||
\section1 Example
|
||||
|
||||
The following example shows how to apply the effect.
|
||||
\snippet BrightnessContrast-example.qml example
|
||||
|
||||
*/
|
||||
Item {
|
||||
id: rootItem
|
||||
|
||||
/*!
|
||||
This property defines the source item that provides the source pixels
|
||||
for the effect.
|
||||
|
||||
\note It is not supported to let the effect include itself, for
|
||||
instance by setting source to the effect's parent.
|
||||
*/
|
||||
property variant source
|
||||
|
||||
/*!
|
||||
This property defines how much the source brightness is increased or
|
||||
decreased.
|
||||
|
||||
The value ranges from -1.0 to 1.0. By default, the property is set to \c
|
||||
0.0 (no change).
|
||||
|
||||
\table
|
||||
\header
|
||||
\li Output examples with different brightness values
|
||||
\li
|
||||
\li
|
||||
\row
|
||||
\li \image BrightnessContrast_brightness1.png
|
||||
\li \image BrightnessContrast_brightness2.png
|
||||
\li \image BrightnessContrast_brightness3.png
|
||||
\row
|
||||
\li \b { brightness: -0.25 }
|
||||
\li \b { brightness: 0 }
|
||||
\li \b { brightness: 0.5 }
|
||||
\row
|
||||
\li \l contrast: 0
|
||||
\li \l contrast: 0
|
||||
\li \l contrast: 0
|
||||
\endtable
|
||||
|
||||
*/
|
||||
property real brightness: 0.0
|
||||
|
||||
/*!
|
||||
This property defines how much the source contrast is increased or
|
||||
decreased. The decrease of the contrast is linear, but the increase is
|
||||
applied with a non-linear curve to allow very high contrast adjustment at
|
||||
the high end of the value range.
|
||||
|
||||
\table
|
||||
\header
|
||||
\li Contrast adjustment curve
|
||||
\row
|
||||
\li \image BrightnessContrast_contrast_graph.png
|
||||
\endtable
|
||||
|
||||
The value ranges from -1.0 to 1.0. By default, the property is set to \c 0.0 (no change).
|
||||
|
||||
\table
|
||||
\header
|
||||
\li Output examples with different contrast values
|
||||
\li
|
||||
\li
|
||||
\row
|
||||
\li \image BrightnessContrast_contrast1.png
|
||||
\li \image BrightnessContrast_contrast2.png
|
||||
\li \image BrightnessContrast_contrast3.png
|
||||
\row
|
||||
\li \b { contrast: -0.5 }
|
||||
\li \b { contrast: 0 }
|
||||
\li \b { contrast: 0.5 }
|
||||
\row
|
||||
\li \l brightness: 0
|
||||
\li \l brightness: 0
|
||||
\li \l brightness: 0
|
||||
\endtable
|
||||
|
||||
*/
|
||||
property real contrast: 0.0
|
||||
|
||||
/*!
|
||||
This property allows the effect output pixels to be cached in order to
|
||||
improve the rendering performance.
|
||||
|
||||
Every time the source or effect properties are changed, the pixels in
|
||||
the cache must be updated. Memory consumption is increased, because an
|
||||
extra buffer of memory is required for storing the effect output.
|
||||
|
||||
It is recommended to disable the cache when the source or the effect
|
||||
properties are animated.
|
||||
|
||||
By default, the property is set to \c false.
|
||||
|
||||
*/
|
||||
property bool cached: false
|
||||
|
||||
SourceProxy {
|
||||
id: sourceProxy
|
||||
input: rootItem.source
|
||||
interpolation: input && input.smooth ? SourceProxy.LinearInterpolation : SourceProxy.NearestInterpolation
|
||||
}
|
||||
|
||||
ShaderEffectSource {
|
||||
id: cacheItem
|
||||
anchors.fill: parent
|
||||
visible: rootItem.cached
|
||||
smooth: true
|
||||
sourceItem: shaderItem
|
||||
live: true
|
||||
hideSource: visible
|
||||
}
|
||||
|
||||
ShaderEffect {
|
||||
id: shaderItem
|
||||
property variant source: sourceProxy.output
|
||||
property real brightness: rootItem.brightness
|
||||
property real contrast: rootItem.contrast
|
||||
|
||||
anchors.fill: parent
|
||||
blending: !rootItem.cached
|
||||
|
||||
fragmentShader: "qrc:/qt-project.org/imports/QtGraphicalEffects/shaders/brightnesscontrast.frag"
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user