Remove qtgraphicaleffects sources and add note about its state in Qt 6HEADdev

Add a README.md mentioning the documentation on where the ported
effects can be found, as well as how to check out the Qt5 branch.

Pick-to: 6.2
Fixes: QTBUG-95757
Change-Id: Ib47c7e73f8622c8e287df0f74c6f16a5113b357e
Reviewed-by: Tor Arne Vestbø <[email protected]>
Reviewed-by: Volker Hilsheimer <[email protected]>

1 files changed, 0 insertions, 449 deletions

diff --git a/src/effects/LevelAdjust.qml b/src/effects/LevelAdjust.qml
deleted file mode 100644
index 5ea2e17..0000000
--- a/src/effects/LevelAdjust.qml
+++ /dev/null
@@ -1,449 +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 LevelAdjust
-    \inqmlmodule QtGraphicalEffects
-    \since QtGraphicalEffects 1.0
-    \inherits QtQuick2::Item
-    \ingroup qtgraphicaleffects-color
-    \brief Adjusts color levels in the RGBA color space.
-
-    This effect adjusts the source item colors separately for each color
-    channel. Source item contrast can be adjusted and color balance altered.
-
-    \table
-    \header
-        \li Source
-        \li Effect applied
-    \row
-        \li \image Original_butterfly.png
-        \li \image LevelAdjust_butterfly.png
-    \endtable
-
-    \section1 Example
-
-    The following example shows how to apply the effect.
-    \snippet LevelAdjust-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 the change factor for how the value of each pixel
-        color channel is altered according to the equation:
-
-        \code
-        result.rgb = pow(original.rgb, 1.0 / gamma.rgb);
-        \endcode
-
-        Setting the gamma values under QtVector3d(1.0, 1.0, 1.0) makes the image
-        darker, the values above QtVector3d(1.0, 1.0, 1.0) lighten it.
-
-        The value ranges from QtVector3d(0.0, 0.0, 0.0) (darkest) to inf
-        (lightest). By default, the property is set to \c QtVector3d(1.0, 1.0,
-        1.0) (no change).
-
-        \table
-        \header
-        \li Output examples with different gamma values
-        \li
-        \li
-        \row
-            \li \image LevelAdjust_gamma1.png
-            \li \image LevelAdjust_gamma2.png
-            \li \image LevelAdjust_gamma3.png
-        \row
-            \li \b { gamma: Qt.vector3d(1.0, 1.0, 1.0) }
-            \li \b { gamma: Qt.vector3d(1.0, 0.4, 2.0) }
-            \li \b { gamma: Qt.vector3d(1.0, 0.1, 4.0) }
-        \row
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-        \row
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-        \row
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-        \row
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-        \endtable
-
-        \table
-        \header
-            \li Pixel color channel luminance curves of the above images.
-            \li
-            \li
-        \row
-            \li \image LevelAdjust_default_curve.png
-            \li \image LevelAdjust_gamma2_curve.png
-            \li \image LevelAdjust_gamma3_curve.png
-        \row
-            \li X-axis: pixel original luminance
-            \li
-            \li
-        \row
-            \li Y-axis: color channel luminance with effect applied
-            \li
-            \li
-        \endtable
-    */
-    property variant gamma: Qt.vector3d(1.0, 1.0, 1.0)
-
-    /*!
-        This property defines the minimum input level for each color channel. It
-        sets the black-point, all pixels having lower value than this property
-        are rendered as black (per color channel). Increasing the value darkens
-        the dark areas.
-
-        The value ranges from "#00000000" to "#ffffffff". By default, the
-        property is set to \c "#00000000" (no change).
-
-        \table
-        \header
-        \li Output examples with different minimumInput values
-        \li
-        \li
-        \row
-            \li \image LevelAdjust_minimumInput1.png
-            \li \image LevelAdjust_minimumInput2.png
-            \li \image LevelAdjust_minimumInput3.png
-        \row
-            \li \b { minimumInput: #00000000 }
-            \li \b { minimumInput: #00000040 }
-            \li \b { minimumInput: #00000070 }
-        \row
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-        \row
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-        \row
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-        \row
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-        \endtable
-
-        \table
-        \header
-            \li Pixel color channel luminance curves of the above images.
-            \li
-            \li
-        \row
-            \li \image LevelAdjust_default_curve.png
-            \li \image LevelAdjust_minimumInput2_curve.png
-            \li \image LevelAdjust_minimumInput3_curve.png
-        \row
-            \li X-axis: pixel original luminance
-            \li
-            \li
-        \row
-            \li Y-axis: color channel luminance with effect applied
-            \li
-            \li
-        \endtable
-
-    */
-    property color minimumInput: Qt.rgba(0.0, 0.0, 0.0, 0.0)
-
-    /*!
-        This property defines the maximum input level for each color channel.
-        It sets the white-point, all pixels having higher value than this
-        property are rendered as white (per color channel).
-        Decreasing the value lightens the light areas.
-
-        The value ranges from "#ffffffff" to "#00000000". By default, the
-        property is set to \c "#ffffffff" (no change).
-
-        \table
-        \header
-        \li Output examples with different maximumInput values
-        \li
-        \li
-        \row
-            \li \image LevelAdjust_maximumInput1.png
-            \li \image LevelAdjust_maximumInput2.png
-            \li \image LevelAdjust_maximumInput3.png
-        \row
-            \li \b { maximumInput: #FFFFFFFF }
-            \li \b { maximumInput: #FFFFFF80 }
-            \li \b { maximumInput: #FFFFFF30 }
-        \row
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-        \row
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-        \row
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-        \row
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-        \endtable
-
-        \table
-        \header
-            \li Pixel color channel luminance curves of the above images.
-            \li
-            \li
-        \row
-            \li \image LevelAdjust_default_curve.png
-            \li \image LevelAdjust_maximumInput2_curve.png
-            \li \image LevelAdjust_maximumInput3_curve.png
-        \row
-            \li X-axis: pixel original luminance
-            \li
-            \li
-        \row
-            \li Y-axis: color channel luminance with effect applied
-            \li
-            \li
-        \endtable
-
-    */
-    property color maximumInput: Qt.rgba(1.0, 1.0, 1.0, 1.0)
-
-    /*!
-        This property defines the minimum output level for each color channel.
-        Increasing the value lightens the dark areas, reducing the contrast.
-
-        The value ranges from "#00000000" to "#ffffffff". By default, the
-        property is set to \c "#00000000" (no change).
-
-        \table
-        \header
-        \li Output examples with different minimumOutput values
-        \li
-        \li
-        \row
-            \li \image LevelAdjust_minimumOutput1.png
-            \li \image LevelAdjust_minimumOutput2.png
-            \li \image LevelAdjust_minimumOutput3.png
-        \row
-            \li \b { minimumOutput: #00000000 }
-            \li \b { minimumOutput: #00000070 }
-            \li \b { minimumOutput: #000000A0 }
-        \row
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-        \row
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-        \row
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-            \li \l maximumOutput: #ffffff
-        \row
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-        \endtable
-
-        \table
-        \header
-            \li Pixel color channel luminance curves of the above images.
-            \li
-            \li
-        \row
-            \li \image LevelAdjust_default_curve.png
-            \li \image LevelAdjust_minimumOutput2_curve.png
-            \li \image LevelAdjust_minimumOutput3_curve.png
-        \row
-            \li X-axis: pixel original luminance
-            \li
-            \li
-        \row
-            \li Y-axis: color channel luminance with effect applied
-            \li
-            \li
-        \endtable
-
-    */
-    property color minimumOutput: Qt.rgba(0.0, 0.0, 0.0, 0.0)
-
-    /*!
-        This property defines the maximum output level for each color channel.
-        Decreasing the value darkens the light areas, reducing the contrast.
-
-        The value ranges from "#ffffffff" to "#00000000". By default, the
-        property is set to \c "#ffffffff" (no change).
-
-        \table
-        \header
-        \li Output examples with different maximumOutput values
-        \li
-        \li
-        \row
-            \li \image LevelAdjust_maximumOutput1.png
-            \li \image LevelAdjust_maximumOutput2.png
-            \li \image LevelAdjust_maximumOutput3.png
-        \row
-            \li \b { maximumOutput: #FFFFFFFF }
-            \li \b { maximumOutput: #FFFFFF80 }
-            \li \b { maximumOutput: #FFFFFF30 }
-        \row
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-            \li \l minimumInput: #000000
-        \row
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-            \li \l maximumInput: #ffffff
-        \row
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-            \li \l minimumOutput: #000000
-        \row
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-            \li \l gamma: Qt.vector3d(1.0, 1.0, 1.0)
-        \endtable
-
-        \table
-        \header
-            \li Pixel color channel luminance curves of the above images.
-            \li
-            \li
-        \row
-            \li \image LevelAdjust_default_curve.png
-            \li \image LevelAdjust_maximumOutput2_curve.png
-            \li \image LevelAdjust_maximumOutput3_curve.png
-        \row
-            \li X-axis: pixel original luminance
-            \li
-            \li
-        \row
-            \li Y-axis: color channel luminance with effect applied
-            \li
-            \li
-        \endtable
-    */
-    property color maximumOutput: Qt.rgba(1.0, 1.0, 1.0, 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 variant minimumInputRGB: Qt.vector3d(rootItem.minimumInput.r, rootItem.minimumInput.g, rootItem.minimumInput.b)
-        property variant maximumInputRGB: Qt.vector3d(rootItem.maximumInput.r, rootItem.maximumInput.g, rootItem.maximumInput.b)
-        property real minimumInputAlpha: rootItem.minimumInput.a
-        property real maximumInputAlpha: rootItem.maximumInput.a
-        property variant minimumOutputRGB: Qt.vector3d(rootItem.minimumOutput.r, rootItem.minimumOutput.g, rootItem.minimumOutput.b)
-        property variant maximumOutputRGB: Qt.vector3d(rootItem.maximumOutput.r, rootItem.maximumOutput.g, rootItem.maximumOutput.b)
-        property real minimumOutputAlpha: rootItem.minimumOutput.a
-        property real maximumOutputAlpha: rootItem.maximumOutput.a
-        property variant gamma: Qt.vector3d(1.0 / Math.max(rootItem.gamma.x, 0.0001), 1.0 / Math.max(rootItem.gamma.y, 0.0001), 1.0 / Math.max(rootItem.gamma.z, 0.0001))
-        anchors.fill: parent
-
-        fragmentShader: "qrc:/qt-project.org/imports/QtGraphicalEffects/shaders_ng/leveladjust.frag.qsb"
-    }
-}