public interface Renderer

Known subtypesSpriteRenderer

Application supplied callback that drives the contents of a RenderView. The methods are always invoked on the platform render thread that owns the GPU context; never touch Codename One UI components directly from these callbacks. Use RenderView.requestRender() or RenderView.setContinuous(boolean) to schedule frames.

Methods

`public abstract void onInit(GraphicsDevice device)`	Invoked once after the GPU context and its `GraphicsDevice` have been created and are current.
`public abstract void onResize(GraphicsDevice device, int width, int height)`	Invoked when the drawable surface size changes, including once after initialization.
`public abstract void onFrame(GraphicsDevice device)`	Invoked once per frame to render the scene.
`public abstract void onDispose(GraphicsDevice device)`	Invoked when the GPU context is being torn down (for example when the view is removed from the UI).

Method details

onInit

public abstract void onInit(GraphicsDevice device)

Invoked once after the GPU context and its GraphicsDevice have been created and are current. Allocate buffers, textures and materials here.

Parameters

device GraphicsDevice: the graphics device bound to this view

onResize

public abstract void onResize(GraphicsDevice device, int width, int height)

Invoked when the drawable surface size changes, including once after initialization. Reconfigure projection matrices and viewports here.

Parameters

device GraphicsDevice: the graphics device bound to this view
width int: the new drawable width in pixels
height int: the new drawable height in pixels

onFrame

public abstract void onFrame(GraphicsDevice device)

Invoked once per frame to render the scene. Issue draw calls against the supplied device.

Parameters

device GraphicsDevice: the graphics device bound to this view

onDispose

public abstract void onDispose(GraphicsDevice device)

Invoked when the GPU context is being torn down (for example when the view is removed from the UI). Release any resources that are not owned by the device. May be invoked with a null device when the context was lost.

Parameters

device GraphicsDevice: the graphics device bound to this view, or null if the context was already lost