/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at
http://mozilla.org/MPL/2.0/.
*
* The origin of this IDL file is
*
https://wiki.whatwg.org/wiki/OffscreenCanvas
*
* © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
* Opera Software ASA. You are granted a license to use, reproduce
* and create derivative works of this document.
*/
// The new ImageBitmapRenderingContext is a canvas rendering context
// which only provides the functionality to replace the canvas's
// contents with the given ImageBitmap. Its context id (the first argument
// to getContext) is "bitmaprenderer".
[Exposed=(Window,Worker)]
interface ImageBitmapRenderingContext {
readonly attribute CanvasSource? canvas;
// Displays the given ImageBitmap in the canvas associated with this
// rendering context. Ownership of the ImageBitmap is transferred to
// the canvas. The caller may not use its reference to the ImageBitmap
// after making this call. (This semantic is crucial to enable prompt
// reclamation of expensive graphics resources, rather than relying on
// garbage collection to do so.)
//
// The ImageBitmap conceptually replaces the canvas's bitmap, but
// it does not change the canvas's intrinsic width or height.
//
// The ImageBitmap, when displayed, is clipped to the rectangle
// defined by the canvas's instrinsic width and height. Pixels that
// would be covered by the canvas's bitmap which are not covered by
// the supplied ImageBitmap are rendered transparent black. Any CSS
// styles affecting the display of the canvas are applied as usual.
[Throws]
undefined transferFromImageBitmap(ImageBitmap? bitmap);
// Deprecated version of transferFromImageBitmap
[Deprecated="ImageBitmapRenderingContext_TransferImageBitmap", Throws]
undefined transferImageBitmap(ImageBitmap bitmap);
};
