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, 278 deletions

diff --git a/src/effects/RectangularGlow.qml b/src/effects/RectangularGlow.qml
deleted file mode 100644
index a148de9..0000000
--- a/src/effects/RectangularGlow.qml
+++ /dev/null
@@ -1,278 +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 RectangularGlow
-    \inqmlmodule QtGraphicalEffects
-    \since QtGraphicalEffects 1.0
-    \inherits QtQuick2::Item
-    \ingroup qtgraphicaleffects-glow
-    \brief Generates a blurred and colorized rectangle, which gives
-    the impression that the source is glowing.
-
-    This effect is intended to have good performance. The shape of the glow is
-    limited to a rectangle with a custom corner radius. For situations where
-    custom shapes are required, consider \l {QtGraphicalEffects::Glow} {Glow}
-    effect.
-
-    \table
-    \header
-        \li Effect applied
-    \row
-        \li \image RectangularGlow_applied.png
-    \endtable
-
-    \section1 Example
-
-    The following example shows how to apply the effect.
-    \snippet RectangularGlow-example.qml example
-*/
-Item {
-    id: rootItem
-
-    /*!
-        This property defines how many pixels outside the item area are reached
-        by the glow.
-
-        The value ranges from 0.0 (no glow) to inf (infinite glow). By default,
-        the property is set to \c 0.0.
-
-        \table
-        \header
-        \li Output examples with different glowRadius values
-        \li
-        \li
-        \row
-            \li \image RectangularGlow_glowRadius1.png
-            \li \image RectangularGlow_glowRadius2.png
-            \li \image RectangularGlow_glowRadius3.png
-        \row
-            \li \b { glowRadius: 10 }
-            \li \b { glowRadius: 20 }
-            \li \b { glowRadius: 40 }
-        \row
-            \li \l spread: 0
-            \li \l spread: 0
-            \li \l spread: 0
-        \row
-            \li \l color: #ffffff
-            \li \l color: #ffffff
-            \li \l color: #ffffff
-        \row
-            \li \l cornerRadius: 25
-            \li \l cornerRadius: 25
-            \li \l cornerRadius: 25
-        \endtable
-
-    */
-    property real glowRadius: 0.0
-
-    /*!
-        This property defines how large part of the glow color is strengthened
-        near the source edges.
-
-        The value ranges from 0.0 (no strength increase) to 1.0 (maximum
-        strength increase). By default, the property is set to \c 0.0.
-
-        \table
-        \header
-        \li Output examples with different spread values
-        \li
-        \li
-        \row
-            \li \image RectangularGlow_spread1.png
-            \li \image RectangularGlow_spread2.png
-            \li \image RectangularGlow_spread3.png
-        \row
-            \li \b { spread: 0.0 }
-            \li \b { spread: 0.5 }
-            \li \b { spread: 1.0 }
-        \row
-            \li \l glowRadius: 20
-            \li \l glowRadius: 20
-            \li \l glowRadius: 20
-        \row
-            \li \l color: #ffffff
-            \li \l color: #ffffff
-            \li \l color: #ffffff
-        \row
-            \li \l cornerRadius: 25
-            \li \l cornerRadius: 25
-            \li \l cornerRadius: 25
-        \endtable
-    */
-    property real spread: 0.0
-
-    /*!
-        This property defines the RGBA color value which is used for the glow.
-
-        By default, the property is set to \c "white".
-
-        \table
-        \header
-        \li Output examples with different color values
-        \li
-        \li
-        \row
-            \li \image RectangularGlow_color1.png
-            \li \image RectangularGlow_color2.png
-            \li \image RectangularGlow_color3.png
-        \row
-            \li \b { color: #ffffff }
-            \li \b { color: #55ff55 }
-            \li \b { color: #5555ff }
-        \row
-            \li \l glowRadius: 20
-            \li \l glowRadius: 20
-            \li \l glowRadius: 20
-        \row
-            \li \l spread: 0
-            \li \l spread: 0
-            \li \l spread: 0
-        \row
-            \li \l cornerRadius: 25
-            \li \l cornerRadius: 25
-            \li \l cornerRadius: 25
-        \endtable
-    */
-    property color color: "white"
-
-    /*!
-        This property defines the corner radius that is used to draw a glow with
-        rounded corners.
-
-        The value ranges from 0.0 to half of the effective width or height of
-        the glow, whichever is smaller. This can be calculated with: \c{
-        min(width, height) / 2.0 + glowRadius}
-
-        By default, the property is bound to glowRadius property. The glow
-        behaves as if the rectangle was blurred when adjusting the glowRadius
-        property.
-
-        \table
-        \header
-        \li Output examples with different cornerRadius values
-        \li
-        \li
-        \row
-            \li \image RectangularGlow_cornerRadius1.png
-            \li \image RectangularGlow_cornerRadius2.png
-            \li \image RectangularGlow_cornerRadius3.png
-        \row
-            \li \b { cornerRadius: 0 }
-            \li \b { cornerRadius: 25 }
-            \li \b { cornerRadius: 50 }
-        \row
-            \li \l glowRadius: 20
-            \li \l glowRadius: 20
-            \li \l glowRadius: 20
-        \row
-            \li \l spread: 0
-            \li \l spread: 0
-            \li \l spread: 0
-        \row
-            \li \l color: #ffffff
-            \li \l color: #ffffff
-            \li \l color: #ffffff
-        \endtable
-    */
-    property real cornerRadius: glowRadius
-
-    /*!
-        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
-
-    ShaderEffectSource {
-         id: cacheItem
-         anchors.fill: shaderItem
-         visible: rootItem.cached
-         smooth: true
-         sourceItem: shaderItem
-         live: true
-         hideSource: visible
-     }
-
-    ShaderEffect {
-        id: shaderItem
-
-        x: (parent.width - width) / 2.0
-        y: (parent.height - height) / 2.0
-        width: parent.width + rootItem.glowRadius * 2 + cornerRadius * 2
-        height: parent.height + rootItem.glowRadius * 2 + cornerRadius * 2
-
-        function clampedCornerRadius() {
-            var maxCornerRadius = Math.min(rootItem.width, rootItem.height) / 2 + glowRadius;
-            return Math.max(0, Math.min(rootItem.cornerRadius, maxCornerRadius))
-        }
-
-        property color color: rootItem.color
-        property real inverseSpread: 1.0 - rootItem.spread
-        property real relativeSizeX: ((inverseSpread * inverseSpread) * rootItem.glowRadius + cornerRadius * 2.0) / width
-        property real relativeSizeY: relativeSizeX * (width / height)
-        property real spread: rootItem.spread / 2.0
-        property real cornerRadius: clampedCornerRadius()
-
-        fragmentShader: "qrc:/qt-project.org/imports/QtGraphicalEffects/shaders_ng/rectangularglow.frag.qsb"
-    }
-}