author | jakl.martin@cell-telecom.com |
Mon, 06 Dec 2010 18:07:30 +0100 | |
branch | NewGraphicsArchitecture |
changeset 218 | 99b3451c560e |
parent 0 | 5d03bc08d59c |
permissions | -rw-r--r-- |
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// Copyright (c) 1996-2009 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: |
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// |
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#ifndef __CDSB_H__ |
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#define __CDSB_H__ |
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#include <e32base.h> |
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#include <bitdev.h> |
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|
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/** |
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Direct Screen Bitmap. |
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API to allow provide synchronisation of the display of images with the |
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displays refresh to prevent tearing. |
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|
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This is an abstract base class, so must be derived from on a per-variant basis. |
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|
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@publishedPartner |
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@released |
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|
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Note: this class is likely to be deprecated in the future |
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*/ |
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class CDirectScreenBitmap : public CBase |
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{ |
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public: |
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enum TSettingsFlags |
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{ |
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ENone = 0, |
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EDoubleBuffer = 1, |
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EIncrementalUpdate = 2 |
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}; |
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|
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public: |
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/** |
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Constructs a CDirectScreenBitmap derived object. |
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The default screen (with number 0) will be used. |
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@return A pointer to the created CDirectScreenBitmap object |
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@leave KErrNoMemory There was insufficient memory to allocate the CDirectScreenBitmap derived object |
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*/ |
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IMPORT_C static CDirectScreenBitmap* NewL(); |
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|
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/** |
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Constructs a CDirectScreenBitmap derived object. |
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@param aScreenNo Screen number, used by the CDirectScreenBitmap object. |
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@return A pointer to the created CDirectScreenBitmap object |
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@leave KErrNoMemory There was insufficient memory to allocate the CDirectScreenBitmap derived object |
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*/ |
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IMPORT_C static CDirectScreenBitmap* NewL(TInt aScreenNo); |
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/** |
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Creates a CDirectScreenBitmap object which can be used for drawing to |
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a region of the screen indicated by aScreenRect. This region must have |
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previously been 'claimed' via the Window Servers Direct Screen Access API. |
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@param aScreenRect The region to be displayed |
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@param aSettingsFlags The mode of operation. The upper 3 bits are used |
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for the screen number value: 0..7. By default the screen |
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with number 0 will be used. |
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@return KErrNone if successful |
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KErrNoMemory if there was insufficient memory |
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KErrNotSupported if the creation failed for other reasons |
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*/ |
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virtual TInt Create(const TRect& aScreenRect, TSettingsFlags aSettingsFlags) =0; |
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/** |
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Returns a TAcceleratedBitmapInfo referring to a bitmap which the |
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applicationcan render to. |
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@param aBitmapInfo The Bitmap |
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@return KErrNone if successful, another error code otherwise |
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*/ |
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virtual TInt BeginUpdate(TAcceleratedBitmapInfo& aBitmapInfo) =0; |
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/** |
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Indicates to the Video Driver that the bitmap corresponding to the |
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update has been fully rendered. The video driver will perform |
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the actions required to copy this to the frame buffer. |
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The request status aComplete will be signalled when the copying has completed. |
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@param aComplete Asynchronous completion status |
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*/ |
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virtual void EndUpdate(TRequestStatus& aComplete) =0; |
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/** |
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Indicates to the Video Driver that the area indicated in aScreenRect has |
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been fully rendered. The video driver will perform the actions required |
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to copy this to the frame buffer. |
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The request status aComplete will be signalled when the copying has completed. |
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Note: aScreenRects coordinates are relative to the screen, not the update region specified |
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in Create(). aScreenRect must fit entirely within the bounds of the original region passed |
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to Create(). |
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106 |
|
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@param aScreenRect The region to update |
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@param aComplete Asynchronous completion status |
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109 |
*/ |
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virtual void EndUpdate(const TRect& aScreenRect, TRequestStatus& aComplete) =0; |
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111 |
|
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112 |
/** |
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Deletes all resources associated with the CDirectScreenBitmap object. |
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114 |
*/ |
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virtual void Close() =0; |
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}; |
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117 |
|
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118 |
#endif |