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| |
| #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 |
| \instantiates 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 |