uigraphics/palette/inc/PaletteConstants.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:14:12 +0200
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/*
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* Copyright (c) 2002 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:  Device specific constants for palette storage.
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*
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*/
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#ifndef __PALETTECONSTANTS_H__
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#define __PALETTECONSTANTS_H__
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/**
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 * Palette switching support is not required in S60 3.x.
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 * This switch disables palette switching. The code will be removed later.
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 * You may ignore the rest of this header while this macro is defined.
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 */
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#define DISABLE_256_COLOR_PALETTE_SWITCHING
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#ifndef DISABLE_256_COLOR_PALETTE_SWITCHING
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/**
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 * The palette code supports two modes of operation, configured with the feature flag
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 * __PALETTE_INDEX_ADDRESS_FIXED.
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 *
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 * If the feature is defined (call it "fast" mode),
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 * the palette index is stored in video memory and the video memory
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 * address is hard coded.
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 *
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 * If the feature is undefined (call it "slow" mode) the palette index is stored in
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 * video memory, but the video memory address is stored in TLS.
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 *
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 * This palette index is accessed a lot, so fast mode can have a positive
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 * effect on performance.
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 */
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#ifdef __WINS__
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// always turn __PALETTE_INDEX_ADDRESS_FIXED on in __WINS__
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#undef __PALETTE_INDEX_ADDRESS_FIXED
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#define __PALETTE_INDEX_ADDRESS_FIXED
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#endif __WINS__
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#ifdef __PALETTE_INDEX_ADDRESS_FIXED
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#ifndef __WINS__
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/**
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 * This is the base address of the video memory for the screen.
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 * This value is only used if the macro __PALETTE_INDEX_ADDRESS_FIXED is defined and
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 * __WINS__ macro is undefined.
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 */
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#include <lcdbaseaddress.h>
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#define DEVICE_VIDEO_ADDR			KLCDBaseAddress
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/**
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 * This is the maximum width of the screen.
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 * This value is only used if the macro __PALETTE_INDEX_ADDRESS_FIXED is defined and
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 * __WINS__ macro is undefined. 
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 * Otherwise, the width is retrieved from the screen driver.
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 */
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#define DEVICE_SCREEN_WIDTH			176
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/**
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 * This is the maximum height of the screen.
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 * This value is only used if the macro __PALETTE_INDEX_ADDRESS_FIXED is defined and
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 * __WINS__ macro is undefined. 
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 * Otherwise, the height is retrieved from the screen driver.
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 */
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#define DEVICE_SCREEN_HEIGHT		208
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#endif
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#endif // __PALETTE_INDEX_ADDRESS_FIXED
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/**
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 * The number of bytes used for each pixel of the screen.
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 */
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#define DEVICE_BYTES_PER_PIXEL		2
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/**
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 * The number of bytes of video memory reserved by the screen driver for other purposes.
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 */
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#define DEVICE_VIDEO_PALETTE_SIZE	32
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#endif // DISABLE_256_COLOR_PALETTE_SWITCHING
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#endif // __PALETTECONSTANTS_H__
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// End of File