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96 lines
4.1 KiB
C++
96 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Vladimir Vukicevic <vladimir@pobox.com>
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsICanvasRenderingContextInternal_h___
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#define nsICanvasRenderingContextInternal_h___
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#include "nsISupports.h"
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#include "nsICanvasElement.h"
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#include "nsIInputStream.h"
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#include "nsIDocShell.h"
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#include "gfxPattern.h"
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// {ed741c16-4039-469b-91da-dca742c51a9f}
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#define NS_ICANVASRENDERINGCONTEXTINTERNAL_IID \
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{ 0xed741c16, 0x4039, 0x469b, { 0x91, 0xda, 0xdc, 0xa7, 0x42, 0xc5, 0x1a, 0x9f } }
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class gfxContext;
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class gfxASurface;
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class nsICanvasRenderingContextInternal : public nsISupports {
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICANVASRENDERINGCONTEXTINTERNAL_IID)
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// This method should NOT hold a ref to aParentCanvas; it will be called
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// with nsnull when the element is going away.
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NS_IMETHOD SetCanvasElement(nsICanvasElement* aParentCanvas) = 0;
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// Sets the dimensions of the canvas, in pixels. Called
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// whenever the size of the element changes.
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NS_IMETHOD SetDimensions(PRInt32 width, PRInt32 height) = 0;
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NS_IMETHOD InitializeWithSurface(nsIDocShell *docShell, gfxASurface *surface, PRInt32 width, PRInt32 height) = 0;
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// Render the canvas at the origin of the given gfxContext
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NS_IMETHOD Render(gfxContext *ctx, gfxPattern::GraphicsFilter aFilter) = 0;
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// Gives you a stream containing the image represented by this context.
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// The format is given in aMimeTime, for example "image/png".
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//
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// If the image format does not support transparency or aIncludeTransparency
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// is false, alpha will be discarded and the result will be the image
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// composited on black.
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NS_IMETHOD GetInputStream(const char *aMimeType,
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const PRUnichar *aEncoderOptions,
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nsIInputStream **aStream) = 0;
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// If this canvas context can be represented with a simple Thebes surface,
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// return the surface. Otherwise returns an error.
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NS_IMETHOD GetThebesSurface(gfxASurface **surface) = 0;
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// If this context is opaque, the backing store of the canvas should
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// be created as opaque; all compositing operators should assume the
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// dst alpha is always 1.0. If this is never called, the context
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// defaults to false (not opaque).
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NS_IMETHOD SetIsOpaque(PRBool isOpaque) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsICanvasRenderingContextInternal,
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NS_ICANVASRENDERINGCONTEXTINTERNAL_IID)
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#endif /* nsICanvasRenderingContextInternal_h___ */
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