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lightning-sunbird  0.9+nobinonly
nsDrawingSurfaceXlib.h
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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):
00023  *   Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
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00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef nsDrawingSurfaceXlib_h__
00040 #define nsDrawingSurfaceXlib_h__
00041 
00042 #include "nsIDrawingSurface.h"
00043 #include "nsGCCache.h"
00044 #include "xlibrgb.h"
00045 
00046 /* common interface for both nsDrawingSurfaceXlibImpl (drawing surface for
00047  * normal displays) and nsXPrintContext (drawing surface for printers) 
00048  */
00049 class nsIDrawingSurfaceXlib : public nsIDrawingSurface
00050 {
00051 public:
00052   NS_IMETHOD Lock(PRInt32 aX, PRInt32 aY, PRUint32 aWidth, PRUint32 aHeight,
00053                   void **aBits, PRInt32 *aStride, PRInt32 *aWidthBytes,
00054                   PRUint32 aFlags) = 0;
00055   NS_IMETHOD Unlock(void) = 0;
00056   NS_IMETHOD GetDimensions(PRUint32 *aWidth, PRUint32 *aHeight) = 0;
00057   NS_IMETHOD IsOffscreen(PRBool *aOffScreen) = 0;
00058   NS_IMETHOD IsPixelAddressable(PRBool *aAddressable) = 0;
00059   NS_IMETHOD GetPixelFormat(nsPixelFormat *aFormat) = 0;
00060 
00061   NS_IMETHOD GetDrawable(Drawable &aDrawable) = 0;
00062   NS_IMETHOD GetXlibRgbHandle(XlibRgbHandle *&aHandle) = 0;
00063   NS_IMETHOD GetGC(xGC *&aXGC) = 0;
00064 
00065   virtual Drawable GetDrawable() = 0;
00066 };
00067 
00068 
00069 class nsDrawingSurfaceXlibImpl : public nsIDrawingSurfaceXlib
00070 {
00071 public:
00072   nsDrawingSurfaceXlibImpl();
00073   virtual ~nsDrawingSurfaceXlibImpl();
00074 
00075   NS_DECL_ISUPPORTS
00076   
00077   NS_IMETHOD Lock(PRInt32 aX, PRInt32 aY, PRUint32 aWidth, PRUint32 aHeight,
00078                   void **aBits, PRInt32 *aStride, PRInt32 *aWidthBytes,
00079                   PRUint32 aFlags);
00080   NS_IMETHOD Unlock(void);
00081   NS_IMETHOD GetDimensions(PRUint32 *aWidth, PRUint32 *aHeight);
00082   NS_IMETHOD IsOffscreen(PRBool *aOffScreen);
00083   NS_IMETHOD IsPixelAddressable(PRBool *aAddressable);
00084   NS_IMETHOD GetPixelFormat(nsPixelFormat *aFormat);
00085 
00086   NS_IMETHOD Init (XlibRgbHandle *aHandle,
00087                    Drawable  aDrawable, 
00088                    xGC       * aGC);
00089 
00090   NS_IMETHOD Init (XlibRgbHandle *aHandle,
00091                    xGC      *  aGC, 
00092                    PRUint32  aWidth, 
00093                    PRUint32  aHeight, 
00094                    PRUint32  aFlags);
00095 
00096   NS_IMETHOD GetDrawable(Drawable &aDrawable) { aDrawable = mDrawable; return NS_OK; }
00097   NS_IMETHOD GetXlibRgbHandle(XlibRgbHandle *&aHandle) { aHandle = mXlibRgbHandle; return NS_OK; }
00098   NS_IMETHOD GetGC(xGC *&aXGC) { mGC->AddRef(); aXGC = mGC; return NS_OK; }
00099 
00100   virtual Drawable GetDrawable() { return mDrawable; }
00101 
00102 private:
00103   void       CommonInit();
00104 
00105   XlibRgbHandle *mXlibRgbHandle;
00106   Display *      mDisplay;
00107   Screen *       mScreen;
00108   Visual *       mVisual;
00109   int            mDepth;
00110   xGC           *mGC;
00111   Drawable       mDrawable;
00112   XImage *       mImage;
00113   nsPixelFormat  mPixFormat;
00114 
00115   // for locking
00116   PRInt32        mLockX;
00117   PRInt32        mLockY;
00118   PRUint32       mLockWidth;
00119   PRUint32       mLockHeight;
00120   PRUint32       mLockFlags;
00121   PRBool         mLocked;
00122 
00123   // dimensions
00124   PRUint32       mWidth;
00125   PRUint32       mHeight;
00126 
00127   // are we offscreen
00128   PRBool         mIsOffscreen;
00129 
00130 private:
00131   static PRUint8 ConvertMaskToCount(unsigned long val);
00132   static PRUint8 GetShiftForMask(unsigned long val);
00133 };
00134 
00135 #endif /* !nsDrawingSurfaceXlib_h__ */
00136