Interface GLEventListener
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- All Superinterfaces:
EventListener
- All Known Subinterfaces:
CustomGLEventListener
,StereoGLEventListener
- All Known Implementing Classes:
StereoClientRenderer
public interface GLEventListener extends EventListener
Declares events which client code can use to manage OpenGL rendering into aGLAutoDrawable
. At the time any of these methods is called, the drawable has made its associated OpenGL context current, so it is valid to make OpenGL calls.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description void
display(GLAutoDrawable drawable)
Called by the drawable to initiate OpenGL rendering by the client.void
dispose(GLAutoDrawable drawable)
Notifies the listener to perform the release of all OpenGL resources per GLContext, such as memory buffers and GLSL programs.void
init(GLAutoDrawable drawable)
Called by the drawable immediately after the OpenGL context is initialized.void
reshape(GLAutoDrawable drawable, int x, int y, int width, int height)
Called by the drawable during the first repaint after the component has been resized.
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Method Detail
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init
void init(GLAutoDrawable drawable)
Called by the drawable immediately after the OpenGL context is initialized. Can be used to perform one-time OpenGL initialization per GLContext, such as setup of lights and display lists.Note that this method may be called more than once if the underlying OpenGL context for the GLAutoDrawable is destroyed and recreated, for example if a GLCanvas is removed from the widget hierarchy and later added again.
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dispose
void dispose(GLAutoDrawable drawable)
Notifies the listener to perform the release of all OpenGL resources per GLContext, such as memory buffers and GLSL programs.Called by the drawable before the OpenGL context is destroyed by an external event, like a reconfiguration of the
GLAutoDrawable
closing an attached window, but also manually by callingdestroy
.Note that this event does not imply the end of life of the application. It could be produced with a followup call to
init(GLAutoDrawable)
in case the GLContext has been recreated, e.g. due to a pixel configuration change in a multihead environment.
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display
void display(GLAutoDrawable drawable)
Called by the drawable to initiate OpenGL rendering by the client. After all GLEventListeners have been notified of a display event, the drawable will swap its buffers ifsetAutoSwapBufferMode
is enabled.
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reshape
void reshape(GLAutoDrawable drawable, int x, int y, int width, int height)
Called by the drawable during the first repaint after the component has been resized.The client can update it's viewport associated data and view volume of the window appropriately.
For efficiency the GL viewport has already been updated via
glViewport(x, y, width, height)
when this method is called.- Parameters:
drawable
- the triggeringGLAutoDrawable
x
- viewport x-coord in pixel unitsy
- viewport y-coord in pixel unitswidth
- viewport width in pixel unitsheight
- viewport height in pixel units
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