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gfxASurface.h
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00001 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
00002  * ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Oracle Corporation code.
00016  *
00017  * The Initial Developer of the Original Code is Oracle Corporation.
00018  * Portions created by the Initial Developer are Copyright (C) 2005
00019  * the Initial Developer. All Rights Reserved.
00020  *
00021  * Contributor(s):
00022  *   Stuart Parmenter <pavlov@pavlov.net>
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
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00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #ifndef GFX_ASURFACE_H
00039 #define GFX_ASURFACE_H
00040 
00041 #include <cairo.h>
00042 
00043 #include "gfxTypes.h"
00044 
00045 class gfxASurface {
00046     THEBES_DECL_REFCOUNTING_ABSTRACT
00047 
00048 public:
00049     /*** this DOES NOT addref the surface */
00050     cairo_surface_t* CairoSurface() { return mSurface; }
00051 
00052 protected:
00053     void Init(cairo_surface_t* surface) {
00054         mDestroyed = PR_FALSE;
00055         mSurface = surface;
00056     }
00057 
00058     void Destroy() {
00059         if (mDestroyed) {
00060             NS_WARNING("Calling Destroy on an already-destroyed surface!");
00061             return;
00062         }
00063 
00064         cairo_surface_destroy(mSurface);
00065         mDestroyed = PR_TRUE;
00066     }
00067 
00068     PRBool Destroyed() {
00069         return mDestroyed;
00070     }
00071 
00072     virtual ~gfxASurface() {
00073         if (!mDestroyed) {
00074             NS_WARNING("gfxASurface::~gfxASurface called, but cairo surface was not destroyed! (Did someone forget to call Destroy()?)");
00075         }
00076     }
00077 private:
00078     cairo_surface_t* mSurface;
00079     PRBool mDestroyed;
00080 };
00081 
00082 #endif /* GFX_ASURFACE_H */