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nsGraphicState.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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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
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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  *
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"),
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 
00039 #ifndef nsGraphicState_h___
00040 #define nsGraphicState_h___
00041 
00042 #include "nsIRenderingContext.h"
00043 #include "nsTransform2D.h"
00044 #include "nsCRT.h"
00045 
00046 #ifndef __QUICKDRAW__
00047 #include <Quickdraw.h>
00048 #endif
00049 
00050 //------------------------------------------------------------------------
00051 
00052 class nsGraphicState
00053 {
00054 public:
00055   nsGraphicState();
00056   ~nsGraphicState();
00057 
00058   NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
00059 
00060        void                        Clear();
00061        void                        Init(nsIDrawingSurface* aSurface);
00062        void                        Init(CGrafPtr aPort);
00063        void                        Init(nsIWidget* aWindow);
00064        void                        Duplicate(nsGraphicState* aGS);    // would you prefer an '=' operator? <anonymous>
00065                                                                                                                                                                  // - no thanks, <pierre>
00066        void                        SetChanges(PRUint32 aChanges) { mChanges = aChanges; }
00067        PRUint32             GetChanges() { return mChanges; }  
00068 
00069 protected:
00070        RgnHandle            DuplicateRgn(RgnHandle aRgn, RgnHandle aDestRgn = nsnull);
00071 
00072 public:
00073        nsTransform2D                             mTMatrix;                                        // transform that all the graphics drawn here will obey
00074 
00075        PRInt32               mOffx;
00076   PRInt32               mOffy;
00077 
00078   RgnHandle                                             mMainRegion;
00079   RgnHandle                               mClipRegion;
00080 
00081   nscolor               mColor;
00082   PRInt32               mFont;
00083   nsIFontMetrics *                 mFontMetrics;
00084        PRInt32               mCurrFontHandle;
00085   nsLineStyle           mLineStyle;
00086        
00087        PRUint32                                                mChanges;                                               // flags indicating changes between this graphics state and the previous.
00088 
00089 private:
00090        friend class nsGraphicStatePool;
00091        nsGraphicState*                           mNext;                                                  // link into free list of graphics states.
00092 };
00093 
00094 //------------------------------------------------------------------------
00095 
00096 class nsGraphicStatePool
00097 {
00098 public:
00099        nsGraphicStatePool();
00100        ~nsGraphicStatePool();
00101 
00102        nsGraphicState*             GetNewGS();
00103        void                                             ReleaseGS(nsGraphicState* aGS);
00104 
00105 private:
00106 
00107        nsGraphicState*      mFreeList;
00108 };
00109 
00110 //------------------------------------------------------------------------
00111 
00112 extern nsGraphicStatePool sGraphicStatePool;
00113 
00114 //------------------------------------------------------------------------
00115 
00116 
00117 #endif //nsGraphicState_h___