CompositeContext (Java SE 17 & JDK 17)
Description: declaration: module: java.desktop, package: java.awt, interface: CompositeContext
Keywords: java.awt.CompositeContext interface

Module java.desktop
Package java.awt

# Interface CompositeContext

public interface CompositeContext
The `CompositeContext` interface defines the encapsulated and optimized environment for a compositing operation. `CompositeContext` objects maintain state for compositing operations. In a multi-threaded environment, several contexts can exist simultaneously for a single `Composite` object.

See Also:
  - `Composite`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `compose(Raster src, Raster dstIn, WritableRaster dstOut)`
  Composes the two source `Raster` objects and places the result in the destination `WritableRaster`.
  `void`
  `dispose()`
  Releases resources allocated for a context.

- ## Method Details

  - ### dispose

    void dispose()
    Releases resources allocated for a context.

  - ### compose

    void compose(Raster src, Raster dstIn, WritableRaster dstOut)
    Composes the two source `Raster` objects and places the result in the destination `WritableRaster`. Note that the destination can be the same object as either the first or second source. Note that `dstIn` and `dstOut` must be compatible with the `dstColorModel` passed to the `createContext` method of the `Composite` interface.
    Parameters:
      `src` - the first source for the compositing operation
      `dstIn` - the second source for the compositing operation
      `dstOut` - the `WritableRaster` into which the result of the operation is stored
    See Also:
      - `Composite`