graphicsdeviceinterface/screendriver/sgeneric/accelhard.cpp
author Matt Plumtree <matt.plumtree@nokia.com>
Fri, 23 Apr 2010 17:57:02 +0100
branchNewGraphicsArchitecture
changeset 39 a4b63488e0b0
parent 0 5d03bc08d59c
permissions -rw-r--r--
Revise some of the compositor performance improvements to improve correctness. Implement pixel blending using a variation of Jim Blinn's no-division blending algorithm. Move transparency type simplification further up the composition code. Remove some unnecessary fields. Output to YUV implementation needs revision as it is actually converting from YUV (copy of source conversion code).
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// Copyright (c) 2003-2009 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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#include "GraphicsAccelerator.h"
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LOCAL_D const TGraphicsAcceleratorCaps HardwareAcceleratorCapabilities =
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{
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    sizeof(TGraphicsAcceleratorCaps),	//TInt iStructureSize;	// The size of this class
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    1,									//TInt iVersion;		// == 1 to specify current API
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    {0}									//Tint iVendorUid;		// Optional ID
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    // Default values of zero...
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};
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EXPORT_C CHardwareGraphicsAccelerator* CHardwareGraphicsAccelerator::NewL(RHardwareBitmap /*aBitmap*/)
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/** 
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Allocates and constructs an instance of a derived class and initialises its 
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capabilities.
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@param aBitmap The hardware bitmap for the accelerator to draw to.
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@return Pointer to the initialised graphics accelerator object.
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@see TGraphicsAcceleratorCaps::iDisplayModes 
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@leave KErrNoMemory There is no memory to allocate the graphics accelerator
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       KErrNotSupported There is no graphics accelerator supporting the display mode given by the bitmap parameter
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*/
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	{
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    User::Leave(KErrNotSupported) ;
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    return NULL ;
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	}
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EXPORT_C const TGraphicsAcceleratorCaps* CHardwareGraphicsAccelerator::GenericCapabilities()
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/** 
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Gets the generic capabilities of the accelerator, including which display modes 
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are supported for the bitmap passed to NewL().
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Generic capabilities apply to all hardware graphics accelerators on the device. 
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The function is static, so it can be used to find out the capabilities of 
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graphics accelerators before deciding on whether or not to create one.
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The CGraphicsAccelerator::Capabilities() function provides information about 
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the capabilities of a particular graphics accelerator.
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As capabilities may vary depending on the display mode of a bitmap, this method 
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should indicate as supported any features which are only available in some 
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display modes.
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@return Generic capabilities for hardware graphics accelerators. 
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*/
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	{
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    return &HardwareAcceleratorCapabilities ;
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	}
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