Back to index

lightning-sunbird  0.9+nobinonly
nsDrawingSurfaceBeOS.h
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s): Sergei Dolgov
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or 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
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #ifndef nsDrawingSurfaceBeOS_h___
00039 #define nsDrawingSurfaceBeOS_h___
00040 
00041 #include "nsIDrawingSurface.h"
00042 #include "nsIDrawingSurfaceBeOS.h"
00043 
00044 #include <Bitmap.h>
00045 #include <View.h>
00046 
00047 class nsDrawingSurfaceBeOS : public nsIDrawingSurface, 
00048                              public nsIDrawingSurfaceBeOS
00049 {
00050 public:
00051   nsDrawingSurfaceBeOS();
00052   virtual ~nsDrawingSurfaceBeOS();
00053 
00054   NS_DECL_ISUPPORTS
00055 
00056   //nsIDrawingSurface interface
00057 
00058   NS_IMETHOD Lock(PRInt32 aX, PRInt32 aY, PRUint32 aWidth, PRUint32 aHeight,
00059                   void **aBits, PRInt32 *aStride, PRInt32 *aWidthBytes,
00060                   PRUint32 aFlags);
00061   NS_IMETHOD Unlock(void);
00062   NS_IMETHOD GetDimensions(PRUint32 *aWidth, PRUint32 *aHeight);
00063   NS_IMETHOD IsOffscreen(PRBool *aOffScreen);
00064   NS_IMETHOD IsPixelAddressable(PRBool *aAddressable);
00065   NS_IMETHOD GetPixelFormat(nsPixelFormat *aFormat);
00066 
00067   // local methods
00068   NS_IMETHOD Init(BView *aView);
00069   NS_IMETHOD Init(BView *aView, PRUint32 aWidth, PRUint32 aHeight,
00070                   PRUint32 aFlags);
00071                   
00072 /* below are utility functions used mostly for nsRenderingContext and nsImage 
00073  * to plug into gdk_* functions for drawing.  You should not set a pointer 
00074  * that might hang around with the return from these.  instead use the ones 
00075  * above.  pav 
00076  */                 
00077   NS_IMETHOD AcquireView(BView **aView); 
00078   NS_IMETHOD ReleaseView(void);
00079   NS_IMETHOD AcquireBitmap(BBitmap **aBitmap);
00080   NS_IMETHOD ReleaseBitmap(void);
00081 
00082   void GetSize(PRUint32 *aWidth, PRUint32 *aHeight) { *aWidth = mWidth; *aHeight = mHeight; } 
00083   bool LockDrawable();
00084   void UnlockDrawable();
00085  
00086 private: 
00087   BView         *mView;
00088   BBitmap       *mBitmap;
00089   nsPixelFormat mPixFormat;
00090   PRUint32      mWidth;
00091   PRUint32      mHeight;
00092   PRUint32      mFlags; 
00093   PRBool        mIsOffscreen; 
00094  
00095   /* for locks */ 
00096   PRUint32     mLockFlags;
00097   PRBool       mLocked;
00098 };
00099 
00100 #endif