gecko/gfx/thebes/gfxQuartzNativeDrawing.h

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** 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 Thebes gfx.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Matthew Gregan <kinetik@flim.org>
*
* 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 _GFXQUARTZNATIVEDRAWING_H_
#define _GFXQUARTZNATIVEDRAWING_H_
#include "mozilla/Attributes.h"
#include "gfxContext.h"
#include "gfxQuartzSurface.h"
class THEBES_API gfxQuartzNativeDrawing {
public:
/* Create native Quartz drawing for a rectangle bounded by
* nativeRect.
*
* Typical usage looks like:
*
* gfxQuartzNativeDrawing nativeDraw(ctx, nativeRect);
* CGContextRef cgContext = nativeDraw.BeginNativeDrawing();
* if (!cgContext)
* return NS_ERROR_FAILURE;
*
* ... call Quartz operations on CGContextRef to draw to nativeRect ...
*
* nativeDraw.EndNativeDrawing();
*/
gfxQuartzNativeDrawing(gfxContext *ctx,
const gfxRect& nativeRect);
/* Returns a CGContextRef which may be used for native drawing. This
* CGContextRef is valid until EndNativeDrawing is called; if it is used
* for drawing after that time, the result is undefined. */
CGContextRef BeginNativeDrawing();
/* Marks the end of native drawing */
void EndNativeDrawing();
private:
// don't allow copying via construction or assignment
gfxQuartzNativeDrawing(const gfxQuartzNativeDrawing&) MOZ_DELETE;
const gfxQuartzNativeDrawing& operator=(const gfxQuartzNativeDrawing&) MOZ_DELETE;
// Final destination context
nsRefPtr<gfxContext> mContext;
// context that draws to mQuartzSurface; can be different from mContext
// if mContext is not drawing to Quartz
nsRefPtr<gfxContext> mSurfaceContext;
gfxRect mNativeRect;
// saved state
nsRefPtr<gfxQuartzSurface> mQuartzSurface;
CGContextRef mCGContext;
};
#endif