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Diffstat (limited to 'src/effects/GammaAdjust.qml')
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diff --git a/src/effects/GammaAdjust.qml b/src/effects/GammaAdjust.qml deleted file mode 100644 index f412f80..0000000 --- a/src/effects/GammaAdjust.qml +++ /dev/null @@ -1,193 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2020 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the Qt Graphical Effects module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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. -** -** BSD License Usage -** Alternatively, 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 2.12 -import QtGraphicalEffects.private 1.12 - -/*! - \qmltype GammaAdjust - \inqmlmodule QtGraphicalEffects - \since QtGraphicalEffects 1.0 - \inherits QtQuick2::Item - \ingroup qtgraphicaleffects-color - \brief Alters the luminance of the source item. - - GammaAdjust is applied to each pixel according to the curve which is - pre-defined as a power-law expression, where the property gamma is used as the - reciprocal scaling exponent. Refer to the property documentation of \l{GammaAdjust::gamma}{gamma} - for more details. - - \table - \header - \li Source - \li Effect applied - \row - \li \image Original_bug.png - \li \image GammaAdjust_bug.png - \endtable - - \section1 Example - - The following example shows how to apply the effect. - \snippet GammaAdjust-example.qml example - -*/ -Item { - id: rootItem - - /*! - This property defines the source item for which the luminance is going to be - adjusted. - - \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 the change factor for how the luminance of each pixel - is altered according to the equation: - - \code -luminance = pow(original_luminance, 1.0 / gamma); // The luminance is assumed to be between 0.0 and 1.0 - \endcode - - Setting the gamma values under 1.0 makes the image darker, the values - above 1.0 lighten it. - - The value ranges from 0.0 (darkest) to inf (lightest). By default, the - property is set to \c 1.0 (no change). - - \table - \header - \li Output examples with different gamma values - \li - \li - \row - \li \image GammaAdjust_gamma1.png - \li \image GammaAdjust_gamma2.png - \li \image GammaAdjust_gamma3.png - \row - \li \b { gamma: 0.5 } - \li \b { gamma: 1.0 } - \li \b { gamma: 2.0 } - \endtable - - \table - \header - \li Pixel luminance curves of the above images. - \li - \li - \row - \li \image GammaAdjust_gamma1_graph.png - \li \image GammaAdjust_gamma2_graph.png - \li \image GammaAdjust_gamma3_graph.png - \row - \li Red curve: default gamma (1.0) - \li - \li - \row - \li Yellow curve: effect applied - \li - \li - \row - \li X-axis: pixel original luminance - \li - \li - \row - \li Y-axis: pixel luminance with effect applied - \li - \li - \endtable - - */ - property real gamma: 1.0 - - /*! - 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 gamma: 1.0 / Math.max(rootItem.gamma, 0.0001) - - anchors.fill: parent - - fragmentShader: "qrc:/qt-project.org/imports/QtGraphicalEffects/shaders_ng/gammaadjust.frag.qsb" - } -} |