http://openjdk.java.net/projects/openjfx/javafx-graphics/: OpenJFX JavaFX
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package com.sun.prism;

import com.sun.javafx.geom.Rectangle;

public interface Presentable extends RenderTarget {
    
Locks any underlying resources needed for a createGraphics/prepare/present sequence and returns a boolean indicating if the presentable needs to be recreated. If the method returns true and the Presentable implements GraphicsResource then its dispose() method will be called prior to recreating a new Presentable object and so no resource should need to be locked in that case. The resources will be unlocked in either prepare() or present(). 
Params:
  • pState – The presentation state for the upcoming pulse
Returns:true if the caller should recreate the Presentable
/**
     * Locks any underlying resources needed for a createGraphics/prepare/present
     * sequence and returns a boolean indicating if the presentable needs to be
     * recreated.
     * If the method returns true and the Presentable implements
     * {@link GraphicsResource} then its {@code dispose()} method will be
     * called prior to recreating a new {@code Presentable} object and
     * so no resource should need to be locked in that case.
     * The resources will be unlocked in either {@link #prepare()} or
     * {@link #present()}.
     *
     * @param pState The presentation state for the upcoming pulse
     * @return true if the caller should recreate the Presentable
     */
    public boolean lockResources(PresentableState pState);

    
display the indicated region to the user.

Params:
  • dirtyregion – display region or null for full area
Returns:true if the provided region was successfully displayed,
false otherwise
/**
     * display the indicated region to the user.
     * @param dirtyregion display region or null for full area
     * @return true if the provided region was successfully displayed,
     * false otherwise
     */
    public boolean prepare(Rectangle dirtyregion);

    
present the prepared region to the user.

/**
     * present the prepared region to the user.
     */
    public boolean present();

    public float getPixelScaleFactorX();
    public float getPixelScaleFactorY();
}