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++ // Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
++ // Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #include "qalphacoverage.h"
++ #include "qrenderstate_p.h"
++
++ QT_BEGIN_NAMESPACE
++
++ namespace Qt3DRender {
++
++ /*!
++ \class Qt3DRender::QAlphaCoverage
++ \since 5.7
++ \ingroup renderstates
++ \inmodule Qt3DRender
++ \brief Enable alpha-to-coverage multisampling mode.
++
++ A Qt3DRender::QAlphaCoverage class enables alpha-to-coverage multisampling mode.
++ When enabled, the fragment alpha value is used as a coverage for the sample
++ and combined with fragment coverage value. Qt3DRender::QAlphaCoverage does
++ nothing if multisampling is disabled. Alpha-to-coverage is most useful when
++ order independent blending is required, for example when rendering leaves,
++ grass and other rich vegetation.
++
++ It can be added to a QRenderPass by calling QRenderPass::addRenderState():
++
++ \code
++ QRenderPass *renderPass = new QRenderPass();
++
++ // Create a alpha coverage render state
++ QAlphaCoverage *alphaCoverage = new QAlphaCoverage();
++ QMultiSampleAntiAliasing *multiSampleAntialiasing = new QMultiSampleAntiAliasing();
++
++ // Add the render states to the render pass
++ renderPass->addRenderState(alphaCoverage);
++ renderPass->addRenderState(multiSampleAntialiasing);
++ \endcode
++
++ Or to a QRenderStateSet by calling QRenderStateSet::addRenderState():
++
++ \code
++ QRenderStateSet *renderStateSet = new QRenderStateSet();
++
++ // Create a alpha coverage render state
++ QAlphaCoverage *alphaCoverage = new QAlphaCoverage();
++ QMultiSampleAntiAliasing *multiSampleAntialiasing = new QMultiSampleAntiAliasing();
++
++ // Add the render states to the render state set
++ renderStateSet->addRenderState(alphaCoverage);
++ renderStateSet->addRenderState(multiSampleAntialiasing);
++ \endcode
++
++ \sa Qt3DRender::QMultiSampleAntiAliasing
++ */
++
++ /*!
++ \qmltype AlphaCoverage
++ \since 5.7
++ \ingroup renderstates
++ \inqmlmodule Qt3D.Render
++ \nativetype Qt3DRender::QAlphaCoverage
++ \inherits RenderState
++ \brief Enable alpha-to-coverage multisampling mode.
++
++ An AlphaCoverage type enables alpha-to-coverage multisampling mode.
++ When enabled, the fragment alpha value is used as a coverage for the sample
++ and combined with fragment coverage value. AlphaCoverage does nothing if
++ multisampling is disabled. Alpha-to-coverage is most useful when
++ order independent blending is required, for example when rendering leaves,
++ grass and other rich vegetation.
++
++ It can be added to a RenderPass:
++
++ \qml
++ RenderPass {
++ shaderProgram: ShaderProgram {
++ // ...
++ }
++ renderStates: [
++ AlphaCoverage {},
++ MultiSampleAntiAliasing {}
++ ]
++ }
++ \endqml
++
++ Or to a RenderStateSet:
++
++ \qml
++ RenderStateSet {
++ renderStates: [
++ AlphaCoverage {},
++ MultiSampleAntiAliasing {}
++ ]
++ }
++ \endqml
++
++ \sa MultiSampleAntiAliasing
++ */
++
++ class QAlphaCoveragePrivate : public QRenderStatePrivate
++ {
++ public :
++ QAlphaCoveragePrivate()
++ : QRenderStatePrivate(Render::AlphaCoverageStateMask)
++ {}
++
++ Q_DECLARE_PUBLIC(QAlphaCoverage)
++ };
++
++ /*!
++ The constructor creates a new QAlphaCoverage::QAlphaCoverage instance
++ with the specified \a parent.
++ */
++ QAlphaCoverage::QAlphaCoverage(QNode *parent)
++ : QRenderState(*new QAlphaCoveragePrivate, parent)
++ {
++ }
++
++ /*! \internal */
++ QAlphaCoverage::~QAlphaCoverage()
++ {
++ }
++
++ } // namespace Qt3DRender
++
++ QT_END_NAMESPACE
++
++ #include "moc_qalphacoverage.cpp"