graphicsdeviceinterface/screendriver/sgeneric/scdraw.inl
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 11 May 2010 17:25:23 +0300
branchRCL_3
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parent 18 5e30ef2e26cb
child 163 bbf46f59e123
permissions -rw-r--r--
Revision: 201017 Kit: 201019
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// Copyright (c) 2007-2009 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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// This module implements the templated classes used to define screen display instances.
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// It only needs to be #included into scnew.cpp whisch is the only place the full-qualified templates are instanced.
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// Most of these methods are simply shims to the SurfaceHelper class.
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// 
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//
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/**
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 @file
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*/
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#ifndef __SCDRAW_INL__
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#define __SCDRAW_INL__
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#include "scdraw.h"	//should have already happened.
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//
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// Implementation of  template CGenericScreenDevice
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// Arguments  <class T>
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// Defines the common portions of a screendriver for GCE 
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//	the actual mode and the bits per pixel (or pixels per word) is not specified.
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//
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/**	Nothing to do to init the screen for the display modes currently supported.
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 * This is the place to set up the palette for low-colour screen devices, possibly including 12-bit.
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 **/
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template <class T> TInt  CGenericScreenDevice<T>::InitScreen()
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	{
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	return KErrNone ;
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	}
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//Construct splits into 2 methods. This portion is not dependent on pixel format
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template <class T> TInt  CGenericScreenDevice<T>::ConstructScreen(TInt , TAny *, TSize aSize, TInt )
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	{
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	CDrawXxxBppBitmap::iScanLineWords = iHelper.BytesPerScanline() / 4;
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	if (CDrawXxxBppBitmap::iScanLineWords==0)
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		{	//Note: This will cause WServ startup to fail. WServ only accepts KErrNotSupported
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		return KErrHardwareNotAvailable;
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		}
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	TInt ret = CDrawXxxBppBitmap::Construct(aSize, CDrawXxxBppBitmap::iScanLineWords << 2);
0
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	if (ret == KErrNone)
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		{
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		CDrawXxxBppBitmap::iBits = (TUint32*)iHelper.AddressFirstPixel();
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		if (CDrawXxxBppBitmap::iBits==NULL)
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			{	//Note: This will cause WServ startup to fail. WServ only accepts KErrNotSupported
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			ret=KErrHardwareNotAvailable;
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			}
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		}
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	return ret;
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	}
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//Switch from the previous aDrawDevice to this one
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template <class T> void CGenericScreenDevice<T>::SetDisplayMode(CFbsDrawDevice* aDrawDevice)
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	{
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	iHelper.ResetUpdateRegion();
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	// Inherit the original draw device's orientation, if available.
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	TDeviceOrientation devOrientation = EDeviceOrientationNormal;
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	TAny* interface = NULL;
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	TInt ret = aDrawDevice->GetInterface(KSurfaceInterfaceID, interface);
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	//can't survive setting a different orientation to the source device so must read it successfully
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	__ASSERT_ALWAYS(ret == KErrNone,Panic(EScreenDriverPanicIncompatiblePreviousDevice));
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	devOrientation = reinterpret_cast<MSurfaceId*>(interface)->DeviceOrientation();
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	//SetDeviceOrientation will panic if it is incompatible
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	SetDeviceOrientation(devOrientation);
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	CDrawXxxBppBitmap::CopyOldSettings(aDrawDevice);
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	InitScreen();
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	}
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template <class T> TInt CGenericScreenDevice<T>::HorzTwipsPerThousandPixels() const
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	{
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 	return iHelper.HorzTwipsPerThousandPixels(CDrawXxxBppBitmap::iSize);
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	}
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template <class T> TInt CGenericScreenDevice<T>::VertTwipsPerThousandPixels() const
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	{
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	return iHelper.VertTwipsPerThousandPixels(CDrawXxxBppBitmap::iSize);
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	}
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template <class T> void CGenericScreenDevice<T>::Update()
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	{
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	iHelper.Update();
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	}
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template <class T> void CGenericScreenDevice<T>::Update(const TRegion& aRegion)
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	{
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	iHelper.Update(aRegion);
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	}
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template <class T> void CGenericScreenDevice<T>::UpdateRegion(const TRect& aRect)
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	{
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	iHelper.UpdateRegion(aRect);
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	}
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template <class T> TInt CGenericScreenDevice<T>::GetInterface(TInt aInterfaceId, TAny*& aInterface)
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	{
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	if(aInterfaceId == KSurfaceInterfaceID)
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	    {
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		aInterface = static_cast <MSurfaceId*> (this);
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		return KErrNone;
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	    }
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	else
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		{
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	    return CDrawXxxBppBitmap::GetInterface(aInterfaceId, aInterface);
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		}
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	}
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template <class T> void CGenericScreenDevice<T>::GetSurface(TSurfaceId& aSid) const 
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	{
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	iHelper.GetSurface(aSid);
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	}
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template <class T> TUint CGenericScreenDevice<T>::DeviceOrientationsAvailable() const 
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	{
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	return iHelper.DeviceOrientationsAvailable(CGenericScreenDevice::iSize);
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	}
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template <class T> TDeviceOrientation CGenericScreenDevice<T>::DeviceOrientation() const 
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	{
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	return iHelper.DeviceOrientation();
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	}
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//
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// Implementation of  template CPalettizedScreenDevice
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// Arguments  <class T,TDisplayMode displayMode,TInt pixelsPerWord>
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// Defines a screendriver for GCE with a mode specified without using a GUID, probably palettized
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//
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//
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//Initialise palletised modes that are not assigned GUIDs
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template <class T,TDisplayMode displayMode,TInt pixelsPerWord> 
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TInt  CPalettizedScreenDevice<T,displayMode,pixelsPerWord>::ConstructScreen(TInt aScreenNo, TAny *aBitmapAddress, TSize aSize, TInt aHalMode)
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	{
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	TInt ret = CGenericScreenDevice::iHelper.Construct(aScreenNo, (TUidPixelFormat)0,aHalMode); //displayMode is NOT recorded in surfaceID
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	if (ret != KErrNone)
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		return ret;
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	return  CGenericScreenDevice::ConstructScreen(aScreenNo,aBitmapAddress,aSize,aHalMode);
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	}
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//Set size members based on pixel width/height, but also set stride member using pixels per word
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template <class T,TDisplayMode displayMode,TInt pixelsPerWord> 
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void CPalettizedScreenDevice<T,displayMode,pixelsPerWord>::SetSize(const TSize& aSize)
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	{
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	CDrawBitmap::SetSize(aSize);
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	__ASSERT_DEBUG(CGenericScreenDevice::iSize == aSize, User::Invariant());
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	CGenericScreenDevice::iLongWidth = CGenericScreenDevice::iScanLineWords * pixelsPerWord;
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	}
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//sets the orientation flags, and rotates  the bitmap.	Calls SetSize, which uses pixelsPerWord 
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template <class T,TDisplayMode displayMode,TInt pixelsPerWord> 
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TBool  CPalettizedScreenDevice<T,displayMode,pixelsPerWord>::SetDeviceOrientation(TDeviceOrientation aOrientation)
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	{
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	TSize newSize;
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	if (!CGenericScreenDevice::iHelper.SetDeviceOrientation(aOrientation, newSize))
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		{
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		return EFalse;
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		}
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	// Need to update size, scan line size, etc.
70
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	CGenericScreenDevice::SetSize(newSize);
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	// Setting iScanLineWords MUST occur after the call to SetSize because SetSize itself
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	// sets iScanLineBytes to support offscreen bitmaps and may do so incorrectly for hardware devices
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	// as it just uses the width, whereas BytesPerScanline takes into account any extra bytes needed
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	// as defined by the hardware.
0
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	CGenericScreenDevice::iScanLineWords = CGenericScreenDevice::iHelper.BytesPerScanline() / 4;	 //presumption here that BPS is always mod4.
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	CGenericScreenDevice::iBits = (TUint32*)CGenericScreenDevice::iHelper.AddressFirstPixel();
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	__ASSERT_ALWAYS(CGenericScreenDevice::iScanLineWords && CGenericScreenDevice::iBits,Panic(EScreenDriverPanicInvalidHalValue));
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	return ETrue;
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	}
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   191
	
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//
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// Implementation of  template CGuidScreenDevice
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// Arguments  <class T,TInt guidMode,TInt pixelsPerWord>
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// Defines a screendriver for GCE with a mode specified using a GUID, probably flat colour
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//
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//
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//Initialise modes that have been assigned GUIDs
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template <class T,TUidPixelFormat guidMode,TInt pixelsPerWord> 
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TInt  CGuidScreenDevice<T,guidMode,pixelsPerWord>::ConstructScreen(TInt aScreenNo, TAny *aBitmapAddress, TSize aSize, TInt aHalMode)
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	{
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	TInt ret = CGenericScreenDevice::iHelper.Construct(aScreenNo, guidMode,aHalMode);
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	if (ret != KErrNone)
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		{
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		return ret;
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		}
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	return  CGenericScreenDevice::ConstructScreen(aScreenNo,aBitmapAddress,aSize,aHalMode);
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	}
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//sets the orientation flags, and rotates  the bitmap.	Calls SetSize, which uses pixelsPerWord 
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template <class T,TUidPixelFormat guidMode,TInt pixelsPerWord> 
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TBool  CGuidScreenDevice<T,guidMode,pixelsPerWord>::SetDeviceOrientation(TDeviceOrientation aOrientation)
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	{
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	TSize newSize;
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	if (!CGenericScreenDevice::iHelper.SetDeviceOrientation(aOrientation, newSize))
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		{
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		return EFalse;
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		}
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	// Need to update size, scan line size, etc.
70
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	CGenericScreenDevice::SetSize(newSize);
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	// Setting iScanLineWords MUST occur after the call to SetSize because SetSize itself
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	// sets iScanLineBytes to support offscreen bitmaps and may do so incorrectly for hardware devices
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	// as it just uses the width, whereas BytesPerScanline takes into account any extra bytes needed
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	// as defined by the hardware.
0
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	CGenericScreenDevice::iScanLineWords = CGenericScreenDevice::iHelper.BytesPerScanline() / 4;	 //presumption here that BPS is always mod4.
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	CGenericScreenDevice::iBits = (TUint32*)CGenericScreenDevice::iHelper.AddressFirstPixel();
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	__ASSERT_ALWAYS(CGenericScreenDevice::iScanLineWords && CGenericScreenDevice::iBits,Panic(EScreenDriverPanicInvalidHalValue));
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	return ETrue;
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	}
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//Set size members based on pixel width/height, but also set stride member using pixels per word
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template <class T,TUidPixelFormat guidMode,TInt pixelsPerWord> 
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void CGuidScreenDevice<T,guidMode,pixelsPerWord>::SetSize(const TSize& aSize)
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	{
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	CDrawBitmap::SetSize(aSize);
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	__ASSERT_DEBUG(CGenericScreenDevice::iSize == aSize, User::Invariant());
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	CGenericScreenDevice::iLongWidth = CGenericScreenDevice::iScanLineWords * pixelsPerWord;
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	}
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#endif	//__SCDRAW_INL__