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, 419 deletions

diff --git a/src/effects/RadialGradient.qml b/src/effects/RadialGradient.qml
deleted file mode 100644
index 9e7dc25..0000000
--- a/src/effects/RadialGradient.qml
+++ /dev/null
@@ -1,419 +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 RadialGradient
-    \inqmlmodule QtGraphicalEffects
-    \since QtGraphicalEffects 1.0
-    \inherits QtQuick2::Item
-    \ingroup qtgraphicaleffects-gradient
-    \brief Draws a radial gradient.
-
-    A gradient is defined by two or more colors, which are blended seamlessly.
-    The colors start from the middle of the item and end at the borders.
-
-    \table
-    \header
-        \li Effect applied
-    \row
-        \li \image RadialGradient.png
-    \endtable
-
-    \section1 Example
-
-    The following example shows how to apply the effect.
-    \snippet RadialGradient-example.qml example
-
-*/
-Item {
-    id: rootItem
-
-    /*!
-        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
-
-    /*!
-        \qmlproperty real RadialGradient::horizontalOffset
-        \qmlproperty real RadialGradient::verticalOffset
-
-        The horizontalOffset and verticalOffset properties define the offset in
-        pixels for the center point of the gradient compared to the item center.
-
-        The values range from -inf to inf. By default, these properties are set
-        to \c 0.
-
-        \table
-        \header
-        \li Output examples with different horizontalOffset values
-        \li
-        \li
-        \row
-            \li \image RadialGradient_horizontalOffset1.png
-            \li \image RadialGradient_horizontalOffset2.png
-            \li \image RadialGradient_horizontalOffset3.png
-        \row
-            \li \b { horizontalOffset: -150 }
-            \li \b { horizontalOffset: 0 }
-            \li \b { horizontalOffset: 150 }
-        \row
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-        \row
-            \li \l horizontalRadius: 300
-            \li \l horizontalRadius: 300
-            \li \l horizontalRadius: 300
-        \row
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-        \row
-            \li \l angle: 0
-            \li \l angle: 0
-            \li \l angle: 0
-        \endtable
-
-    */
-    property real horizontalOffset: 0.0
-    property real verticalOffset: 0.0
-
-    /*!
-        \qmlproperty real RadialGradient::horizontalRadius
-        \qmlproperty real RadialGradient::verticalRadius
-
-        The horizontalRadius and verticalRadius properties define the shape and
-        size of the radial gradient. If the radiuses are equal, the shape of the
-        gradient is a circle. If the horizontal and vertical radiuses differ,
-        the shape is elliptical. The radiuses are given in pixels.
-
-        The value ranges from -inf to inf. By default, horizontalRadius is bound
-        to width and verticalRadius is bound to height.
-
-        \table
-        \header
-        \li Output examples with different horizontalRadius values
-        \li
-        \li
-        \row
-            \li \image RadialGradient_horizontalRadius1.png
-            \li \image RadialGradient_horizontalRadius2.png
-        \row
-            \li \b { horizontalRadius: 300 }
-            \li \b { horizontalRadius: 100 }
-        \row
-            \li \l horizontalOffset: 0
-            \li \l horizontalOffset: 0
-        \row
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-        \row
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-        \row
-            \li \l angle: 0
-            \li \l angle: 0
-        \row
-            \li \l gradient: QQuickGradient(0xa05fb10)
-            \li \l gradient: QQuickGradient(0xa05fb10)
-        \endtable
-
-    */
-    property real horizontalRadius: width
-    property real verticalRadius: height
-
-    /*!
-        This property defines the rotation of the gradient around its center
-        point. The rotation is only visible when the
-        \l{RadialGradient::horizontalRadius}{horizontalRadius} and
-        \l{RadialGradient::verticalRadius}{verticalRadius} properties are not
-        equal. The angle is given in degrees and the default value is \c 0.
-
-        \table
-        \header
-        \li Output examples with different angle values
-        \li
-        \li
-        \row
-            \li \image RadialGradient_angle1.png
-            \li \image RadialGradient_angle2.png
-            \li \image RadialGradient_angle3.png
-        \row
-            \li \b { angle: 0 }
-            \li \b { angle: 45 }
-            \li \b { angle: 90 }
-        \row
-            \li \l horizontalOffset: 0
-            \li \l horizontalOffset: 0
-            \li \l horizontalOffset: 0
-        \row
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-        \row
-            \li \l horizontalRadius: 100
-            \li \l horizontalRadius: 100
-            \li \l horizontalRadius: 100
-        \row
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-        \endtable
-    */
-    property real angle: 0.0
-
-    /*!
-        This property defines the item that is going to be filled with gradient.
-        Source item gets rendered into an intermediate pixel buffer and the
-        alpha values from the result are used to determine the gradient's pixels
-        visibility in the display. The default value for source is undefined and
-        in that case whole effect area is filled with gradient.
-
-        \table
-        \header
-        \li Output examples with different source values
-        \li
-        \li
-        \row
-            \li \image RadialGradient_maskSource1.png
-            \li \image RadialGradient_maskSource2.png
-        \row
-            \li \b { source: undefined }
-            \li \b { source: Image { source: images/butterfly.png } }
-        \row
-            \li \l horizontalOffset: 0
-            \li \l horizontalOffset: 0
-        \row
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-        \row
-            \li \l horizontalRadius: 300
-            \li \l horizontalRadius: 300
-        \row
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-        \row
-            \li \l angle: 0
-            \li \l angle: 0
-        \endtable
-
-        \note It is not supported to let the effect include itself, for
-        instance by setting source to the effect's parent.
-    */
-    property variant source
-
-    /*!
-        A gradient is defined by two or more colors, which are blended
-        seamlessly. The colors are specified as a set of GradientStop child
-        items, each of which defines a position on the gradient from 0.0 to 1.0
-        and a color. The position of each GradientStop is defined by setting the
-        position property. The color is defined by setting the color property.
-
-        \table
-        \header
-        \li Output examples with different gradient values
-        \li
-        \li
-        \row
-            \li \image RadialGradient_gradient1.png
-            \li \image RadialGradient_gradient2.png
-            \li \image RadialGradient_gradient3.png
-        \row
-            \li \b {gradient:} \code
-    Gradient {
-      GradientStop {
-       position: 0.000
-       color: Qt.rgba(1, 0, 0, 1)
-      }
-      GradientStop {
-       position: 0.167
-       color: Qt.rgba(1, 1, 0, 1)
-      }
-      GradientStop {
-       position: 0.333
-       color: Qt.rgba(0, 1, 0, 1)
-      }
-      GradientStop {
-       position: 0.500
-       color: Qt.rgba(0, 1, 1, 1)
-       }
-      GradientStop {
-       position: 0.667
-       color: Qt.rgba(0, 0, 1, 1)
-      }
-      GradientStop {
-       position: 0.833
-       color: Qt.rgba(1, 0, 1, 1)
-      }
-      GradientStop {
-       position: 1.000
-       color: Qt.rgba(1, 0, 0, 1)
-      }
-    }
-        \endcode
-            \li \b {gradient:} \code
-    Gradient {
-      GradientStop {
-        position: 0.0
-        color: "#F0F0F0"
-      }
-      GradientStop {
-        position: 0.5
-        color: "#000000"
-      }
-      GradientStop {
-        position: 1.0
-        color: "#F0F0F0"
-      }
-    }
-        \endcode
-            \li \b {gradient:}
-    \code
-    Gradient {
-      GradientStop {
-        position: 0.0
-        color: "#00000000"
-      }
-      GradientStop {
-        position: 1.0
-        color: "#FF000000"
-      }
-    }
-    \endcode
-        \row
-            \li \l horizontalOffset: 0
-            \li \l horizontalOffset: 0
-            \li \l horizontalOffset: 0
-        \row
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-            \li \l verticalOffset: 0
-        \row
-            \li \l horizontalRadius: 300
-            \li \l horizontalRadius: 300
-            \li \l horizontalRadius: 300
-        \row
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-            \li \l verticalRadius: 300
-        \row
-            \li \l angle: 0
-            \li \l angle: 0
-            \li \l angle: 0
-        \endtable
-    */
-    property Gradient gradient: Gradient {
-        GradientStop { position: 0.0; color: "white" }
-        GradientStop { position: 1.0; color: "black" }
-    }
-
-    SourceProxy {
-        id: maskSourceProxy
-        input: rootItem.source
-    }
-
-    ShaderEffectSource {
-        id: gradientSource
-        sourceItem: Rectangle {
-            width: 16
-            height: 256
-            gradient: rootItem.gradient
-            smooth: true
-        }
-        smooth: true
-        hideSource: true
-        visible: false
-    }
-
-   ShaderEffectSource {
-        id: cacheItem
-        anchors.fill: parent
-        visible: rootItem.cached
-        smooth: true
-        sourceItem: shaderItem
-        live: true
-        hideSource: visible
-    }
-
-    ShaderEffect {
-        id: shaderItem
-        property variant gradientImage: gradientSource
-        property variant maskSource: maskSourceProxy.output
-        property variant center: Qt.point(0.5 + rootItem.horizontalOffset / width, 0.5 + rootItem.verticalOffset / height)
-        property real horizontalRatio: rootItem.horizontalRadius > 0 ? width / (2 * rootItem.horizontalRadius) : width * 16384
-        property real verticalRatio: rootItem.verticalRadius > 0 ? height / (2 * rootItem.verticalRadius) : height * 16384
-        property real angle: -rootItem.angle / 360 * 2 * Math.PI
-        property variant matrixData: Qt.point(Math.sin(angle), Math.cos(angle))
-
-        anchors.fill: parent
-
-        vertexShader: "qrc:/qt-project.org/imports/QtGraphicalEffects/shaders_ng/radialgradient.vert.qsb"
-
-        fragmentShader: maskSource == undefined ? noMaskShader : maskShader
-
-        onFragmentShaderChanged: horizontalRatioChanged()
-
-        property string maskShader: "qrc:/qt-project.org/imports/QtGraphicalEffects/shaders_ng/radialgradient_mask.frag.qsb"
-        property string noMaskShader: "qrc:/qt-project.org/imports/QtGraphicalEffects/shaders_ng/radialgradient_nomask.frag.qsb"
-    }
-}