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