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src/java.desktop/share/classes/java/awt/Composite.java

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*** 26,84 **** package java.awt; import java.awt.image.ColorModel; /** ! * The <code>Composite</code> interface, along with * {@link CompositeContext}, defines the methods to compose a draw * primitive with the underlying graphics area. ! * After the <code>Composite</code> is set in the * {@link Graphics2D} context, it combines a shape, text, or an image * being rendered with the colors that have already been rendered * according to pre-defined rules. The classes * implementing this interface provide the rules and a method to create * the context for a particular operation. ! * <code>CompositeContext</code> is an environment used by the ! * compositing operation, which is created by the <code>Graphics2D</code> ! * prior to the start of the operation. <code>CompositeContext</code> * contains private information and resources needed for a compositing ! * operation. When the <code>CompositeContext</code> is no longer needed, ! * the <code>Graphics2D</code> object disposes of it in order to reclaim * resources allocated for the operation. * <p> ! * Instances of classes implementing <code>Composite</code> must be ! * immutable because the <code>Graphics2D</code> does not clone * these objects when they are set as an attribute with the ! * <code>setComposite</code> method or when the <code>Graphics2D</code> * object is cloned. This is to avoid undefined rendering behavior of ! * <code>Graphics2D</code>, resulting from the modification of ! * the <code>Composite</code> object after it has been set in the ! * <code>Graphics2D</code> context. * <p> * Since this interface must expose the contents of pixels on the * target device or image to potentially arbitrary code, the use of * custom objects which implement this interface when rendering directly ! * to a screen device is governed by the <code>readDisplayPixels</code> * {@link AWTPermission}. The permission check will occur when such ! * a custom object is passed to the <code>setComposite</code> method ! * of a <code>Graphics2D</code> retrieved from a {@link Component}. * @see AlphaComposite * @see CompositeContext * @see Graphics2D#setComposite */ public interface Composite { /** * Creates a context containing state that is used to perform * the compositing operation. In a multi-threaded environment, * several contexts can exist simultaneously for a single ! * <code>Composite</code> object. * @param srcColorModel the {@link ColorModel} of the source ! * @param dstColorModel the <code>ColorModel</code> of the destination * @param hints the hint that the context object uses to choose between * rendering alternatives ! * @return the <code>CompositeContext</code> object used to perform the * compositing operation. */ public CompositeContext createContext(ColorModel srcColorModel, ColorModel dstColorModel, RenderingHints hints); --- 26,84 ---- package java.awt; import java.awt.image.ColorModel; /** ! * The {@code Composite} interface, along with * {@link CompositeContext}, defines the methods to compose a draw * primitive with the underlying graphics area. ! * After the {@code Composite} is set in the * {@link Graphics2D} context, it combines a shape, text, or an image * being rendered with the colors that have already been rendered * according to pre-defined rules. The classes * implementing this interface provide the rules and a method to create * the context for a particular operation. ! * {@code CompositeContext} is an environment used by the ! * compositing operation, which is created by the {@code Graphics2D} ! * prior to the start of the operation. {@code CompositeContext} * contains private information and resources needed for a compositing ! * operation. When the {@code CompositeContext} is no longer needed, ! * the {@code Graphics2D} object disposes of it in order to reclaim * resources allocated for the operation. * <p> ! * Instances of classes implementing {@code Composite} must be ! * immutable because the {@code Graphics2D} does not clone * these objects when they are set as an attribute with the ! * {@code setComposite} method or when the {@code Graphics2D} * object is cloned. This is to avoid undefined rendering behavior of ! * {@code Graphics2D}, resulting from the modification of ! * the {@code Composite} object after it has been set in the ! * {@code Graphics2D} context. * <p> * Since this interface must expose the contents of pixels on the * target device or image to potentially arbitrary code, the use of * custom objects which implement this interface when rendering directly ! * to a screen device is governed by the {@code readDisplayPixels} * {@link AWTPermission}. The permission check will occur when such ! * a custom object is passed to the {@code setComposite} method ! * of a {@code Graphics2D} retrieved from a {@link Component}. * @see AlphaComposite * @see CompositeContext * @see Graphics2D#setComposite */ public interface Composite { /** * Creates a context containing state that is used to perform * the compositing operation. In a multi-threaded environment, * several contexts can exist simultaneously for a single ! * {@code Composite} object. * @param srcColorModel the {@link ColorModel} of the source ! * @param dstColorModel the {@code ColorModel} of the destination * @param hints the hint that the context object uses to choose between * rendering alternatives ! * @return the {@code CompositeContext} object used to perform the * compositing operation. */ public CompositeContext createContext(ColorModel srcColorModel, ColorModel dstColorModel, RenderingHints hints);
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