LowLatencyCanvasView.Callback
interface LowLatencyCanvasView.Callback
Provides callbacks for consumers to draw into the front buffered overlay as well as provide opportunities to synchronize SurfaceControlCompat.Transactions to submit the layers to the hardware compositor
Summary
Public functions |
|
|---|---|
Unit |
@WorkerThreadCallback invoked to render content into the front buffered layer with the specified parameters. |
open Unit |
@WorkerThreadOptional callback invoked when rendering to the front buffered layer is complete but before the buffers are submitted to the hardware compositor. |
Unit |
@WorkerThreadCallback invoked when the entire scene should be re-rendered. |
Public functions
onDrawFrontBufferedLayer
@WorkerThread
fun onDrawFrontBufferedLayer(canvas: Canvas, width: Int, height: Int): Unit
Callback invoked to render content into the front buffered layer with the specified parameters.
onFrontBufferedLayerRenderComplete
@WorkerThread
open fun onFrontBufferedLayerRenderComplete(
frontBufferedLayerSurfaceControl: SurfaceControlCompat,
transaction: SurfaceControlCompat.Transaction
): Unit
Optional callback invoked when rendering to the front buffered layer is complete but before the buffers are submitted to the hardware compositor. This provides consumers a mechanism for synchronizing the transaction with other SurfaceControlCompat objects that maybe rendered within the scene.
| Parameters | |
|---|---|
frontBufferedLayerSurfaceControl: SurfaceControlCompat |
Handle to the |
transaction: SurfaceControlCompat.Transaction |
Current |
onRedrawRequested
@WorkerThread
fun onRedrawRequested(canvas: Canvas, width: Int, height: Int): Unit
Callback invoked when the entire scene should be re-rendered. This is invoked during initialization and when the corresponding Activity is resumed from a background state.