gecko/content/canvas/public/nsICanvasElementExternal.h

91 lines
3.3 KiB
C++

/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Vladimir Vukicevic <vladimir@pobox.com>
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsICanvasElementExternal_h___
#define nsICanvasElementExternal_h___
#include "nsISupports.h"
#include "gfxPattern.h"
class gfxContext;
class nsIFrame;
struct gfxRect;
#define NS_ICANVASELEMENTEXTERNAL_IID \
{ 0x51870f54, 0x6c4c, 0x469a, {0xad, 0x46, 0xf0, 0xa9, 0x8e, 0x32, 0xa7, 0xe2 } }
class nsRenderingContext;
class nsICanvasRenderingContextInternal;
struct _cairo_surface;
/*
* This interface contains methods that are needed outside of the content/layout
* modules, specifically widget. It should eventually go away when we support
* libxul builds, and nsHTMLCanvasElement be used directly.
*
* Code internal to content/layout should /never/ use this interface; if the
* same functionality is needed in both places, two separate methods should be
* used.
*/
class nsICanvasElementExternal : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICANVASELEMENTEXTERNAL_IID)
enum {
RenderFlagPremultAlpha = 0x1
};
/**
* Get the size in pixels of this canvas element
*/
NS_IMETHOD_(nsIntSize) GetSizeExternal() = 0;
/*
* Ask the canvas element to tell the contexts to render themselves
* to the given gfxContext at the origin of its coordinate space.
*/
NS_IMETHOD RenderContextsExternal(gfxContext *ctx,
gfxPattern::GraphicsFilter aFilter,
PRUint32 aFlags = RenderFlagPremultAlpha) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsICanvasElementExternal, NS_ICANVASELEMENTEXTERNAL_IID)
#endif /* nsICanvasElementExternal_h___ */