author | Stefan Karlsson <stefan.karlsson@nokia.com> |
Sun, 28 Mar 2010 16:38:10 +0100 | |
branch | CompilerCompatibility |
changeset 9 | 63ff45340ef4 |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006 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: Bitmap provider interface. |
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* |
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*/ |
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#ifndef C_ALFBITMAPPROVIDER_H |
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#define C_ALFBITMAPPROVIDER_H |
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class CFbsBitmap; |
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/** |
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* MAlfBitmapProvider is an interface that provides a bitmap and its alpha |
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* mask when requested. |
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* |
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* By storing MAlfBitmapProviders in the CAlfTextureManager we can delete and |
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* regenerate the textures used by the toolkit as needed - enabling improved |
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* use of memory resource, such as when the application goes to background. |
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* In this case, when we want to restore all the textures, we may just recall |
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* the providers to reload the textures. |
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* |
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* Typically, control classes would implement the ProvideBitmapL method of this |
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* class, which would handle all the loading or generation needed to produce the |
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* bitmaps stored by the TextureManager. |
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* |
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* A provider should exist as long as the associated texture is stored within |
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* the texture manager. |
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*/ |
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class MAlfBitmapProvider |
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{ |
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public: |
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virtual ~MAlfBitmapProvider() |
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{ |
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} |
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/** |
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* Provide a bitmap and mask from the given UID. |
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* This method should create a bitmap and its mask, usually by loading it from disk. |
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* |
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* @param aId TextureManager id of this bitmap, may be used for extracting |
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* an icon resource. |
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* @param aBitmap Output parameter for the provider: On return, has to store |
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* a pointer to the generated bitmap. Ownership transferred to caller. |
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* The support for input CFbsBitmap formats varies between |
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* different renderers. See \ref cfbsbitmapsupport |
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* Table describing renderer bitmap support. |
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* @param aMaskBitmap |
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* Output parameter for the provider: On return, has to store |
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* a pointer to the generated alpha mask or <code>NULL</code> |
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* if there is no mask. Ownership of the bitmap is transferred |
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* to the caller. |
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* |
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* @see CAlfTextureManager::CreateTextureL() |
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*/ |
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virtual void ProvideBitmapL(TInt aId, CFbsBitmap*& aBitmap, CFbsBitmap*& aMaskBitmap) = 0; |
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}; |
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#endif // C_ALFBITMAPPROVIDER_H |