QSSGRenderExtension Class
Base class for extension backend node implementations. More...
| Header: | #include <QSSGRenderExtension> |
| Since: | Qt 6.7 |
Public Types
| enum class | RenderMode { Standalone, Main } |
| enum class | RenderStage { PreColor, PostColor } |
Public Functions
| virtual QSSGRenderExtension::RenderMode | mode() const = 0 |
| virtual bool | prepareData(QSSGFrameData &data) = 0 |
| virtual void | prepareRender(QSSGFrameData &data) = 0 |
| virtual void | render(QSSGFrameData &data) = 0 |
| virtual void | resetForFrame() = 0 |
| virtual QSSGRenderExtension::RenderStage | stage() const = 0 |
See also QQuick3DRenderExtension.
Member Type Documentation
enum class QSSGRenderExtension::RenderMode
Specifies the render extension mode.
| Constant | Value | Description |
|---|---|---|
QSSGRenderExtension::RenderMode::Standalone | 0 | The rendering code is recorded in full during the render prepare phase. This will usually imply that there are some output crated for a preceding render extension(s). When this mode is used the prepareRender() and render() functions are both called during the frame's prepare phase. |
QSSGRenderExtension::RenderMode::Main | 1 | The rendering code is recorded within the main render pass. In this mode the prepareRender() is called in the frame's prepare phase while render() is called the frame's render phase. |
enum class QSSGRenderExtension::RenderStage
Specifies the order the extension will be called.
| Constant | Value | Description |
|---|---|---|
QSSGRenderExtension::RenderStage::PreColor | 0 | The rendering code is recorded and executed before the main (color) pass. |
QSSGRenderExtension::RenderStage::PostColor | 1 | The rendering code is recorded and executed after the main (color) pass. |
Member Function Documentation
[pure virtual] QSSGRenderExtension::RenderMode QSSGRenderExtension::mode() const
Returns The render mode used for this extension.
[pure virtual] bool QSSGRenderExtension::prepareData(QSSGFrameData &data)
Called after scene data is collected, but before any render data or rendering in the current frame has been done.
Returns Dirty state. Return true if the there are dirty data that needs to be rendered.
Note: Much of the data created/collected from the engine during the prepare and render phases is per-frame and should be released or assumed released at the start of the next frame
See also QSSGFrameData.
[pure virtual] void QSSGRenderExtension::prepareRender(QSSGFrameData &data)
Prepare data for rendering. Build and collect data needed for rendering. Any render extension scheduled before this one has been processed. In addition; any render extension of mode RenderMode::Standalone will, if successful, have been completed in full.
Note: Much of the data created/collected from the engine during the prepare and render phases is per-frame and should be released or assumed released at the start of the next frame
See also QSSGFrameData.
[pure virtual] void QSSGRenderExtension::render(QSSGFrameData &data)
Record the render pass. Depending on the extensions mode this function will be called during the frame's prepare or render phase.
Use data to gain access to the render context from which the active QRhi object can be queried.
See also QSSGRenderExtension::RenderMode.
[pure virtual] void QSSGRenderExtension::resetForFrame()
Called each time a new frame starts. Any data from the previous frame should be cleared at this point.
[pure virtual] QSSGRenderExtension::RenderStage QSSGRenderExtension::stage() const
Returns The stage in which this render extension will be used.
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