author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 15:56:24 +0300 | |
changeset 14 | 83d2d132aa58 |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Definition of CHuiCanvasPainter. |
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* |
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*/ |
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#ifndef __HUICANVASPAINTER_H__ |
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#define __HUICANVASPAINTER_H__ |
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#include <e32cmn.h> |
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#include <e32std.h> |
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#include <e32base.h> |
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#include <e32def.h> |
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#include "huicanvastexturecache.h" |
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/* Forward declarations. */ |
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class CHuiControl; |
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class THuiCanvasDrawImageParams; |
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class THuiCanvasTextParameters; |
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class CHuiCanvasGc ; |
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class CHuiGc; |
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class CHuiCanvasCommandBuffer; |
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const TInt KHuiCanvasCommandBufferRegionGranularity = 5; |
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enum THuiCanvasBufferStatusFlags |
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{ |
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/** Buffer is new */ |
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EHuiCanvasBufferStatusNew = 0x1, |
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/** Buffer has been scanned */ |
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EHuiCanvasBufferStatusScanned = 0x2, |
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/** Buffer has been drawn */ |
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EHuiCanvasBufferStatusDrawn = 0x4, |
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/** Flag to say wheter buffer really contains somethign that really draws something */ |
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EHuiCanvasBufferContainsDrawing = 0x8000, |
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EHuiCanvasBufferContainsTransparentClear = 0x10000, |
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/** All flags, can be used for clearing all flags */ |
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EHuiCanvasBufferStatusAll = 0xFFFFFFFF |
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}; |
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NONSHARABLE_CLASS( MHuiCmdBufDestroyObserver ) |
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{ |
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public: |
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virtual void DestroyBuffer(CHuiCanvasCommandBuffer *aBuffer)=0; |
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}; |
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NONSHARABLE_CLASS( CHuiCanvasCommandBuffer ) : public CBase |
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{ |
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public: |
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CHuiCanvasCommandBuffer() : |
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iChanged(ETrue), |
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iStatusFlags(EHuiCanvasBufferStatusNew) |
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{ |
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iCreationTime.UniversalTime(); |
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} |
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~CHuiCanvasCommandBuffer() |
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{ |
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TInt count = iObservers.Count(); |
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for(int i=0;i<count;i++) |
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{ |
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iObservers[i]->DestroyBuffer(this); |
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} |
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iObservers.Close(); |
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delete iCommands; |
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iUpdateRegion.Close(); |
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iOriginalUpdateRegion.Close(); |
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#ifdef HUI_DEBUG_TRACK_DRAWING |
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delete iProcessName; |
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#endif |
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} |
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void SetStatusFlags(THuiCanvasBufferStatusFlags aStatusFlags) |
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{ |
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iStatusFlags |= aStatusFlags; |
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} |
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void ClearStatusFlags(THuiCanvasBufferStatusFlags aStatusFlags) |
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{ |
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iStatusFlags &= ~aStatusFlags; |
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} |
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void AddDestroyObserver(MHuiCmdBufDestroyObserver *aObserver ) |
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{ |
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iObservers.AppendL(aObserver); |
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} |
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void RemoveDestroyObserver(MHuiCmdBufDestroyObserver *aObserver) |
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{ |
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TInt count = iObservers.Count(); |
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for(int i=count-1;i>=0;i--) |
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{ |
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if (iObservers[i]==aObserver) |
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{ |
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iObservers.Remove(i); |
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} |
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} |
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} |
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113 |
public: |
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/** Buffer containing the drawing commands */ |
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HBufC8* iCommands; |
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/** Optional region which specifies the area where commands are to be drawn */ |
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RRegionBuf<KHuiCanvasCommandBufferRegionGranularity> iUpdateRegion; |
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|
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/** The original iUpdateRegion before any intersection with the shape region */ |
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RRegionBuf<KHuiCanvasCommandBufferRegionGranularity> iOriginalUpdateRegion; |
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/** Rect of the visual when command buffer was set/added */ |
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THuiRealRect iOriginalDisplayRect; |
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/** The position of the visual, when the update region was last modfied */ |
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TPoint iPositionForUpdateRegion; |
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/** Internal flag that can be used to track changes. This is similar to visual changed flag. */ |
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TBool iChanged; |
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/** Internal flag that can be used to track buffer status. This is mainly used for optimizing drawing. */ |
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TInt iStatusFlags; |
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/** Time when this buffer has been created */ |
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TTime iCreationTime; |
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|
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/** Display orientation when this buffer has been created */ |
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CHuiGc::TOrientation iOrientation; |
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140 |
|
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/** Flag to tell if buffer has unsupported commands (fallback mode is needed) */ |
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TBool iContainsUnsupportedCommands; |
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|
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#ifdef HUI_DEBUG_TRACK_DRAWING |
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TBool iTrackedBuffer; |
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146 |
|
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HBufC16* iProcessName; |
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#endif |
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149 |
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RPointerArray<MHuiCmdBufDestroyObserver> iObservers; |
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}; |
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|
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enum THuiCanvasBufferAction |
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{ |
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/** Draw buffer content to the canvas */ |
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EDrawBuffer, |
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157 |
|
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/** Scan buffer content */ |
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EScanBuffer |
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}; |
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|
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/** |
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* This class is used internally by the toolkit and thus should |
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* not be used by the applications directly. |
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*/ |
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NONSHARABLE_CLASS (CHuiCanvasPainter) : public CBase |
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{ |
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|
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public: |
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|
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/** |
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* Sets buffer that contains canvas drawing commands. This |
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* method clears previous buffer(s), so this is eqvivalent |
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* to calling both ClearCommandSet and AddCommandSetL. |
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* |
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* @param aCommands Commanbuffer |
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*/ |
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virtual void SetCommandSetL( const TDesC8& aCommands ); |
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|
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/** |
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* Clears buffer(s) that contains canvas drawing commands. |
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*/ |
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virtual void ClearCommandSet(); |
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|
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/** |
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* Adds buffer that contains more canvas drawing commands, |
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* those will be executed after the buffers that has been |
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* added previously. |
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* @param aMoreCommands Commanbuffer |
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*/ |
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virtual void AddCommandSetL( const TDesC8& aMoreCommands ); |
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|
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/** |
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* Adds partial buffer that contains more canvas drawing commands. These |
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* commands are appended to the commands set previously with this method |
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* until param aLastPart has value ETrue. After that whole command set |
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* will be added among possibly already existing command sets and |
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* it will be drawable. |
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* |
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* @param aMoreCommands Commanbuffer |
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* @param aLastPart EFalse if there are more commands to be added into this |
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* command set before it is wanted to be available for drawing. ETrue if |
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* command set is ready and no more parts are expected. |
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*/ |
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virtual void AddPartialCommandSetL( const TDesC8& aMoreCommands, TBool aLastPart ); |
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|
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#ifdef HUI_DEBUG_TRACK_DRAWING |
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virtual void SetTrackCommandSet( TFileName& aFileName, TBool aTrack ); |
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#endif |
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/** |
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* Clears internal cached texts and images. |
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*/ |
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virtual void ClearCache()= 0; |
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|
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/** |
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* Handles the command buffer(s), either draws or performs a scan. |
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* |
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* @param aDisplayRect Area in screen coordinates where painter is supposed to draw, |
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* method implementation should modify the given rect to contain the real (smaller) |
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* area where drawing happens. |
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* |
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* @param aAction Action that painter is supposed to do with the buffer. |
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* |
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* Possible values are: |
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* |
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* EScanBuffer - Painter is supposed to scan the buffer and |
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* 1) Prepare its internal caches (if it uses such) and other |
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* similar opearations which may take relatively long time to complete. |
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* 2) Prepare PaintedAreaCount() and PaintedArea() to contain the |
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* real rectangles where drawing is going to happen. |
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* |
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* EDrawBuffer - Painter is supposed to draw the content of the |
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* buffer to the given display rect. This action is supposed to |
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* be as fast as possible. |
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* |
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* @param aUser Canvas visual using this painter |
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* @param aGc Toolkit graphics context |
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* @param @aPos The current position of the visual. This is used for drawing |
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* the buffers on correct location, if the visual position changes |
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*/ |
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virtual void HandleBufferL(TRect& aDisplayRect, TInt aAction, const CHuiCanvasVisual& aUser, CHuiGc* aGc, TPoint aPos ) = 0; |
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|
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/** Same as the other handlebuffer, except it allows external command buffers to be provided |
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* |
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*/ |
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virtual void HandleBufferL(TRect& aDisplayRect, TInt aAction, const CHuiCanvasVisual& aUser, CHuiGc* aGc, TPoint aPos, TPtrC8 aCommands, CHuiCanvasCommandBuffer *buf) =0; |
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/** |
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* Returns the number of rectangular areas which contain something that is |
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* drawn by the painter. |
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* |
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* @return number of painted areas. |
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* @see PaintedArea() |
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*/ |
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virtual TInt PaintedAreaCount() const = 0; |
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|
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/** |
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* Returns information of the painted area at given index. |
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* |
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* @aIndex Index of the painted area. |
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* @return Painted area info. |
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* @see PaintedAreaCount() |
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*/ |
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virtual THuiCanvasPaintedArea PaintedArea(TInt aIndex) = 0; |
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|
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/** |
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* Draws content of the window in pixel format to the given bitmap. |
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* This method may not be supported in all commanbuffertype/renderer combinations. |
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* |
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* @param aTargetBuffer where content of the window is to be drawn. NULL if the drawing |
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* is to be stopped. |
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* |
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* @return KErrNotSupported if the current renderer/painter does not support the |
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* feature. Leave happens in other unexpected error situtations. |
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* |
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*/ |
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virtual TInt SetCapturingBufferL(CFbsBitmap* /*aTarget*/) = 0; |
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|
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/** |
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* Tells painter to enable/disable render buffer (if it is supported by the |
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* painter implementation) |
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* |
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* @return KErrNotSupported if the current renderer/painter does not support the |
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* feature. * |
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*/ |
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virtual TInt EnableRenderBuffer(TBool aEnable = ETrue) = 0; |
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|
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/** |
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* Destructor |
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*/ |
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virtual ~CHuiCanvasPainter(); |
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|
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/** |
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* Returns reference to used canvas gc |
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*/ |
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virtual CHuiCanvasGc& CanvasGc() const = 0; |
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/** |
14
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* Clears capturing buffer area with completely transparent. |
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* @param aRect rect to clear. |
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*/ |
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virtual void ClearCapturingBufferArea(const TRect& aRect); |
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/** |
0
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* Sets canvas visual that this painter draws into |
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*/ |
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void SetVisual(CHuiCanvasVisual* aVisual); |
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|
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/** |
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* Gets canvas visual that this painter is drawing into. |
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*/ |
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CHuiCanvasVisual* Visual(); |
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/** |
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* Does this painter have command buffers |
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*/ |
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TBool HasCommandBuffers(); |
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/** |
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* Is any of the buffers changed |
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*/ |
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TBool BuffersChanged() const; |
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/** |
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* Clear every buffers changed flag. |
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*/ |
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void ClearAllBuffersChanged(); |
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/** |
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* Sets every buffers changed flag to the given value. |
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* @param aChange flag value |
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*/ |
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void SetAllBuffersChanged(TBool aChanged); |
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/** |
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* Requests env to start refresh of whole visual tree |
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*/ |
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void RequestContinueRefresh(); |
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/** |
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* Sets given status for every buffer. |
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*/ |
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void SetAllBufferStatusFlags(THuiCanvasBufferStatusFlags aStatus); |
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/** |
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* Clears given status for every buffer. |
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*/ |
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void ClearAllBufferStatusFlags(THuiCanvasBufferStatusFlags aStatus); |
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/** |
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* Does this painter have command buffers with given statusflags. |
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*/ |
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TBool HasCommandBuffers(THuiCanvasBufferStatusFlags aStatusFlags); |
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/** |
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* Does this painter have command buffers without given statusflags. |
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*/ |
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TBool HasCommandBuffersWithoutFlags(THuiCanvasBufferStatusFlags aStatusFlags); |
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/** |
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* Does this painter have command buffers older than given time. |
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*/ |
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TBool HasOldCommandBuffers(TInt aLifeTimeInMs); |
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/** |
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* Returns the area covered by buffers in the given orientation |
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*/ |
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TRect CommandBufferCoverage(TInt aOrientation); |
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TInt NumBuffers() const { return iCommandBuffers.Count(); } |
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CHuiCanvasCommandBuffer *At(TInt aIndex) const { return iCommandBuffers[aIndex]; } |
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protected: |
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/** Command buffers */ |
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RPointerArray<CHuiCanvasCommandBuffer> iCommandBuffers; |
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/** Partial command buffer which will be updated with more commands soon. This buffer is not yet ready for drawing */ |
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HBufC8* iPartialCommandBuffer; |
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/** Canvas visual which uses this background */ |
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CHuiCanvasVisual* iCanvasVisual; |
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}; |
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#endif // __HUICANVASPAINTER_H__ |