--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicsdeviceinterface/screendriver/sgeneric/scnew.cpp Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,650 @@
+// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// This module implements the functions that create the screen class depending
+// on the screen type.
+// Include files
+//
+//
+
+/**
+ @file
+*/
+/********************************************************************/
+#include "BITDRAW.H"
+#include <hal.h>
+#include "ScreenInfo.h"
+#include "scdraw.h"
+#include "scdraw.inl"
+#include <graphics/gdi/gdiconsts.h>
+
+
+/**
+Creates an instance of CFbsDrawDevice class.
+@param aScreenNo Screen number
+@param aDispMode Display mode
+@param aScreenInfo Screen parameters: video memory address and screen size
+@return A pointer to the created CFbsDrawDevice object
+@leave System-wide error code including KErrNoMemory
+@internalComponent
+*/
+static CFbsDrawDevice* CreateInstanceL(TInt aScreenNo,
+ TDisplayMode aDispMode,
+ const TScreenInfo& aScreenInfo)
+ {
+ CFbsDrawDevice* drawDevice = NULL;
+
+ TInt modeCount;
+ TInt matchedMode=-1;
+ //there is some "ambiguity" about 24 and 32 bit modes...
+ //They are both byte per color component, and both actually have 32 bits per pixel memory use.
+ //This ambiguity does not exist between 12 and 16 bit modes,
+ //because they are distinct color component patterns (x444, 565)
+ //but for now 24 and 32 bit modes are considered equivalent here.
+
+ if (HAL::Get(aScreenNo, HALData::EDisplayNumModes,modeCount)== KErrNone && modeCount>=1)
+ { //If multiple modes are supported then the highest bpp must be found
+
+ TInt reqBpp= TDisplayModeUtils::NumDisplayModeBitsPerPixel(aDispMode);
+ TInt reqBpp2=reqBpp;
+ if ( reqBpp==24 || reqBpp==32 ) //Best to be specific here. Who knows how likely is 30 or 64 bpp support?
+ {
+ reqBpp2=32+24 - reqBpp; //reflect 24<==>32
+ //Important compile-time decision embedded here: Only one 32-bit mode is supported
+ if(CFbsDrawDevice::DisplayMode16M() != aDispMode)
+ {
+ User::Leave(KErrNotSupported);
+ }
+ }
+ for (TInt mode=0; mode<modeCount; mode++)
+ {
+ TInt modeBpp=mode;
+ if(HAL::Get(aScreenNo, HALData::EDisplayBitsPerPixel, modeBpp) == KErrNone)
+ {
+ if (modeBpp==reqBpp || modeBpp==reqBpp2)
+ {
+ matchedMode=mode;
+ break;
+ }
+ }
+ }
+ }
+ if (matchedMode==-1)
+ { //This is the expected error code
+ User::Leave(KErrNotSupported);
+ }
+ //Switch the display mode, call the constructor of the class defined
+ switch(aDispMode)
+ {
+ /** Monochrome display mode (1 bpp) */
+ case EGray2:
+ {
+ CDrawOneBppScreenBitmap* drawDeviceX = new (ELeave) CDrawOneBppScreenBitmap;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ /** Four grayscales display mode (2 bpp) */
+ case EGray4:
+ {
+ CDrawTwoBppScreenBitmap* drawDeviceX = new (ELeave) CDrawTwoBppScreenBitmap;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ /** 16 grayscales display mode (4 bpp) */
+ case EGray16:
+ {
+ CDrawFourBppScreenBitmapGray* drawDeviceX = new (ELeave) CDrawFourBppScreenBitmapGray;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ /** 256 grayscales display mode (8 bpp) */
+ case EGray256:
+ {
+ CDrawEightBppScreenBitmapGray* drawDeviceX = new (ELeave) CDrawEightBppScreenBitmapGray;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ /** Low colour EGA 16 colour display mode (4 bpp) */
+ case EColor16:
+ {
+ CDrawFourBppScreenBitmapColor* drawDeviceX = new (ELeave) CDrawFourBppScreenBitmapColor;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ /** 256 colour display mode (8 bpp) */
+ case EColor256:
+ {
+ CDrawEightBppScreenBitmapColor* drawDeviceX = new (ELeave) CDrawEightBppScreenBitmapColor;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ /** 4,000 colour display mode (16 bpp) */
+ case EColor4K: // 12 Bpp color mode
+ {
+ CDrawTwelveBppScreenBitmapColor* drawDeviceX = new (ELeave) CDrawTwelveBppScreenBitmapColor;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+
+ case EColor64K: // 16 Bpp color mode
+ {
+ CDrawSixteenBppScreenBitmap* drawDeviceX = new (ELeave) CDrawSixteenBppScreenBitmap;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ case EColor16MU:
+ {
+ CDrawUTwentyFourBppScreenBitmap* drawDeviceX = new (ELeave) CDrawUTwentyFourBppScreenBitmap;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ case EColor16MA:
+ {
+ CDrawThirtyTwoBppScreenBitmapAlpha* drawDeviceX = new (ELeave) CDrawThirtyTwoBppScreenBitmapAlpha;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ case EColor16MAP:
+ {
+ CDrawThirtyTwoBppScreenBitmapAlphaPM* drawDeviceX = new (ELeave) CDrawThirtyTwoBppScreenBitmapAlphaPM;
+ drawDevice=drawDeviceX;
+ CleanupStack::PushL(drawDevice) ;
+ User::LeaveIfError(drawDeviceX->ConstructScreen(
+ aScreenNo,
+ aScreenInfo.iAddress,
+ aScreenInfo.iSize,matchedMode));
+ }
+ break;
+ default:
+ User::Leave(KErrNotSupported);
+ }
+
+ CleanupStack::Pop(drawDevice);
+ return drawDevice;
+ }
+
+
+/********************************************************************/
+/* Implementation of CFbsDrawDevice class */
+/********************************************************************/
+
+/**
+This function calls the correct constructor in function of the display mode.
+@param aInfo, Structure of the LCD info
+@param aDispMode, display mode
+@return A pointer to just created screen device, which implements CFbsDrawDevice interface
+@deprecated Use CFbsDrawDevice::NewScreenDeviceL(TInt aScreenNo, TDisplayMode aDispMode)
+*/
+EXPORT_C CFbsDrawDevice* CFbsDrawDevice::NewScreenDeviceL(TScreenInfoV01 aInfo, TDisplayMode aDispMode)
+ {
+ __ASSERT_ALWAYS(aInfo.iScreenAddressValid, Panic(EScreenDriverPanicInvalidWindowHandle));
+ TScreenInfo screenInfo(aInfo.iScreenAddress, aInfo.iScreenSize);
+ return ::CreateInstanceL(KDefaultScreenNo, aDispMode, screenInfo);
+ }
+
+
+
+/**
+Creates a new screen device instance, which implements CFbsDrawDevice interface.
+The method has to be implemented for each type of supported video hardware.
+@param aScreenNo Screen number
+@param aDispMode Requested display mode
+@return A pointer to just created screen device, which implements CFbsDrawDevice interface
+@leave KErrNoMemory Not enough memory
+ KErrNotSupported The requested screen device type is not supported
+*/
+EXPORT_C CFbsDrawDevice* CFbsDrawDevice::NewScreenDeviceL(TInt aScreenNo,
+ TDisplayMode aDispMode)
+ {
+ TInt width = 0, height = 0;
+ User::LeaveIfError(HAL::Get(aScreenNo, HALData::EDisplayXPixels, width));
+ User::LeaveIfError(HAL::Get(aScreenNo, HALData::EDisplayYPixels, height));
+ __ASSERT_ALWAYS(width > 0 && height > 0, Panic(EScreenDriverPanicInvalidHalValue));
+
+ TUint8* address = 0;
+
+ TScreenInfo screenInfo(address, TSize(width, height));
+ return ::CreateInstanceL(aScreenNo, aDispMode, screenInfo);
+ }
+
+/**
+ Depending on the current graphics hardware this
+ will return one of the 16M video modes defined in
+ TDisplayMode, or ENone if a 16M video mode is not supported.
+ The method has to be implemented on all hardware platforms.
+ @return a 16M display mode or ENone.
+ ENone - it means that current hardware doesn't have 16M color mode.
+*/
+EXPORT_C TDisplayMode CFbsDrawDevice::DisplayMode16M()
+ {
+ return EColor16MAP;
+ }
+
+
+/**
+Complete construction of the helper object.
+@param aScreenNo The screen number, starting from 0.
+@param aPixelFormat Pixel format UID or 0 for default based on bpp
+@return KErrNone or a system wide error value.
+*/
+TInt CScreenDeviceHelper::Construct(TInt aScreenNo, TUidPixelFormat aPixelFormat, TUint aHalMode)
+ {
+ iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EScreenField] = aScreenNo; // Screen number
+ iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField] = aHalMode; // Rotation and hal mode index
+ iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::ETypeGuidField] = aPixelFormat; //May be zero for non-GCE modes
+ iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::ETypeClassField]
+ = ((TUint32)(TSurfaceId::EScreenSurface) << TSurfaceId::TScreenSurfaceUsage::ETypeClassShift); // Type
+ iAssignedOrientation = EDeviceOrientationNormal; // Actual rotation is held seperately from surface ID
+
+ TInt val = 0;
+ iHasChunk = EFalse;
+ TInt ret = HAL::Get(aScreenNo,HALData::EDisplayMemoryHandle,val);
+ if (ret == KErrNone)
+ {
+ __ASSERT_DEBUG(val != 0, Panic(EScreenDriverPanicInvalidHalValue));
+ RChunk chunk;
+ ret = chunk.SetReturnedHandle(val);
+ if (ret != KErrNone)
+ {
+ return ret;
+ }
+ iChunk = chunk;
+ ret = iChunk.Duplicate(RThread(), EOwnerProcess);
+ // Close before checking for errors, as we don't want to leave the
+ // temporary chunk handle floating about.
+ chunk.Close();
+ if (ret != KErrNone)
+ {
+ return ret;
+ }
+ iHasChunk = ETrue;
+ }
+ // KErrNotSupported is returned if we can't get the Handle because it's not a driver
+ // that supports the concept. We don't return that error, since it's perfectly valid
+ // to not support this.
+ else if (ret != KErrNotSupported)
+ {
+ return ret;
+ }
+ return iSurfaceUpdateSession.Connect();
+ }
+
+CScreenDeviceHelper::~CScreenDeviceHelper()
+ {
+
+ iSurfaceUpdateSession.Close();
+ iChunk.Close();
+ }
+
+void CScreenDeviceHelper::NotifyWhenAvailable(TRequestStatus& aStatus)
+ {
+ iSurfaceUpdateSession.NotifyWhenAvailable(aStatus);
+ }
+
+/**
+Implementation of corresponding function in CDrawDevice, utilizing a tracked
+update region. Updates the screen from the surface, if the update region is
+not empty.
+*/
+void CScreenDeviceHelper::Update()
+ {
+ if (iUpdateRegion.IsEmpty())
+ return;
+
+ iSurfaceUpdateSession.SubmitUpdate(ScreenNumber(), iSurface, 0, &iUpdateRegion);
+ iUpdateRegion.Clear();
+ }
+
+/**
+Implementation of corresponding function in CDrawDevice, utilizing a tracked
+update region. Adds the given region to the update region and updates the
+screen.
+@param aRegion Additional region to be updated.
+*/
+void CScreenDeviceHelper::Update(const TRegion& aRegion)
+ {
+ if(!aRegion.IsEmpty() && !aRegion.CheckError())
+ {
+ TInt rcCnt = aRegion.Count();
+ for (TInt ii=0; ii < rcCnt; ++ii)
+ {
+ UpdateRegion(aRegion[ii]);
+ }
+ }
+ Update();
+ }
+
+/**
+Implementation of corresponding function in CDrawDevice, utilizing a tracked
+update region. Adds the given rectangle to the update region.
+@param aRect Rectangle to be added to the update region.
+*/
+void CScreenDeviceHelper::UpdateRegion(const TRect& aRect)
+ {
+ if (aRect.IsEmpty())
+ {
+ // Adding an empty rectangle should have no effect.
+ return;
+ }
+
+ if (iUpdateRegion.CheckError())
+ {
+ // Try to ensure the region doesn't keep an error forever.
+ iUpdateRegion.Clear();
+ }
+
+ TRect bounds(iUpdateRegion.BoundingRect());
+ iUpdateRegion.AddRect(aRect);
+
+ // If the region fills up, start again with the old bounding box plus this
+ // rectangle.
+ if (iUpdateRegion.CheckError())
+ {
+ iUpdateRegion.Clear();
+ iUpdateRegion.AddRect(bounds);
+ iUpdateRegion.AddRect(aRect);
+ }
+ }
+
+/**
+Reset the update region to be empty without submitting any outstanding updates.
+*/
+void CScreenDeviceHelper::ResetUpdateRegion()
+ {
+ iUpdateRegion.Clear();
+ }
+
+/**
+This function returns the current surface in use for this screen.
+@param aSurface The identifier to be updated with the current screen surface.
+*/
+void CScreenDeviceHelper::GetSurface(TSurfaceId& aSid) const
+ {
+ aSid = iSurface;
+ }
+
+/**
+This function is used to request the device orientations supported by the
+screen device.
+@return A bitwise combination of one or more TDeviceOrientation enumerated
+values indicating the device orientations that are supported by this device.
+*/
+TUint CScreenDeviceHelper::DeviceOrientationsAvailable(const TSize& aScreenSize) const
+ {
+ //All that can be reported here is what the CScreenDevice can support via HAL
+ //With generic driver, the runtime can be further restricted by the GCE
+ if ( aScreenSize.iWidth && aScreenSize.iWidth==aScreenSize.iHeight )
+ {
+ return EDeviceOrientationNormal | EDeviceOrientation90CW |
+ EDeviceOrientation180 | EDeviceOrientation270CW;
+ }
+ //Query base HAL for rotated view support
+ TInt offset1=iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField]|TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag;
+ if ( HAL::Get(ScreenNumber(), HALData::EDisplayOffsetBetweenLines, offset1)==KErrNone
+ && offset1!=0)
+ {
+ return EDeviceOrientationNormal | EDeviceOrientation90CW |
+ EDeviceOrientation180 | EDeviceOrientation270CW;
+ }
+ else
+ return EDeviceOrientationNormal | EDeviceOrientation180;
+ }
+
+/**
+This function selects the surface and device buffer to use in the screen
+driver for this screen. Normal and 180° rotations will generally use the same
+surface, while 90° and 270° will use another. The surfaces may have different
+width, height, stride and surface ID, so functions that make use of any of
+these may be affected after a change in surface orientation, and the return
+value should be checked for this reason.
+
+This call does not change the way rendering is performed, but may operate on
+the underlying memory using a new shape. The call does not change the display
+controller's settings, as this is handled via the GCE. All this changes are the
+internal attributes of the screen device and driver objects. A CFbsBitGc object
+activated on the device should be reactivated, to update its own attributes, or
+drawing may be corrupted.
+
+Note: while TDeviceOrientation values do not directly correspond to
+CFbsBitGc::TGraphicsOrientation values, and cannot be used interchangeably, it
+is simple to generate the former from the latter using the left-shift operator
+(i.e. device == (1 << graphics)). In particular a device orientation of
+90 degrees clockwise is equivalent to a content orientation of 90 degrees anti-
+clockwise, which is what TGraphicsOrientation refers to for the equivalent
+setting. The letters "CW" in the TDeviceOrientation enumeration refer
+to a clockwise device rotation, so EDeviceOrientation90CW is a 90 degree
+clockwise rotation of the device.
+
+@param aOrientation The new device orientation, relative to the normal physical
+screen orientation.
+@param aNewSize The new pixel dimensions of the surface to be used.
+@return ETrue is returned if any of the surface, width, height or stride
+attributes of the screen device have changed as a result of the call or EFalse
+if none of the attributes have changed.
+*/
+TBool CScreenDeviceHelper::SetDeviceOrientation(TDeviceOrientation aOrientation, TSize& aNewSize)
+ {
+ // Check only one orientation bit is set
+ if (((TInt)aOrientation - 1) & aOrientation)
+ {
+ Panic(EScreenDriverPanicInvalidParameter);
+ }
+
+ // Check the orientation is supported
+ if ((DeviceOrientationsAvailable(aNewSize) & aOrientation) == 0)
+ {
+ Panic(EScreenDriverPanicInvalidParameter);
+ }
+
+ iAssignedOrientation=aOrientation;
+
+ return SetDeviceFlipMode(ConvertFlip(aOrientation),aNewSize);
+ }
+/** Sets or clears the flipped flag indicating that the width and height have been swapped for a +/-90 deg rotation
+ * Rotation is not required for square displays unless the Hal wants one.
+ **/
+TBool CScreenDeviceHelper::SetDeviceFlipMode(TBool aFlip, TSize& aNewSize)
+ {
+ //This is now a private method that doesn't validate aFlip
+ TInt newFlipMode= iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField];
+ if (aFlip)
+ {
+ newFlipMode|=TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag;
+ }
+ else
+ {
+ newFlipMode&=~TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag;
+ }
+ if (newFlipMode == iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField])
+ {
+ // No change to mode requested.
+ return EFalse;
+ }
+ TInt err=0;
+ err|=HAL::Get(ScreenNumber(), HALData::EDisplayXPixels, aNewSize.iWidth);
+ err|=HAL::Get(ScreenNumber(), HALData::EDisplayYPixels, aNewSize.iHeight);
+ __ASSERT_ALWAYS(err==KErrNone,Panic(EScreenDriverPanicInvalidHalValue));
+ if (aNewSize.iWidth==aNewSize.iHeight)
+ { //Attempt optimisation to not flip if the screen is square, so avoid recomposition.
+ TInt stride1=iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField];
+ TInt stride2=stride1^TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag;
+ TInt offset1=stride1;
+ TInt offset2=stride2;
+ //Does the rotated mode have any other attributes that differ?
+ //It is just about possible to imagine that the rotated display
+ //wants to use a different setting for the flipped legacy buffer for optimisation purposes.
+ err|=HAL::Get(ScreenNumber(), HALData::EDisplayOffsetToFirstPixel, offset1);
+ err|=HAL::Get(ScreenNumber(), HALData::EDisplayOffsetBetweenLines, stride1);
+ //The existing mode settings should not fail... we are already in this mode!
+ __ASSERT_ALWAYS(err==KErrNone,Panic(EScreenDriverPanicInvalidHalValue));
+
+ TInt rotatedErr = HAL::Get(ScreenNumber(), HALData::EDisplayOffsetToFirstPixel, offset2);
+ rotatedErr |= HAL::Get(ScreenNumber(), HALData::EDisplayOffsetBetweenLines, stride2);
+ //The HAL may indicate rotation is not required by failing to return data or returning the same data
+ if ( rotatedErr!=KErrNone || stride2==0 ) //Offset can legitimately be zero.
+ {
+ // No change to mode supported.
+ return EFalse;
+ }
+ if ( stride1==stride2 && offset1==offset2 )
+ {
+ // No change to mode needed.
+ return EFalse;
+ }
+ }
+
+ iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField] = newFlipMode;
+ if (aFlip)
+ {
+ // Swap width and height in the alternate orientation.
+ aNewSize.SetSize(aNewSize.iHeight, aNewSize.iWidth);
+ }
+ return ETrue;
+ }
+/** Returns the stride for the given mode.
+ * This method must not panic if it should fail!
+ **/
+TUint CScreenDeviceHelper::BytesPerScanline() const
+ {
+ TInt linepitchInBytes = iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField];
+ TInt ret = HAL::Get(ScreenNumber(),HALData::EDisplayOffsetBetweenLines,linepitchInBytes);
+ if (ret!=KErrNone)
+ {
+ return 0;
+ }
+ return linepitchInBytes ;
+ }
+/** Returns the address for the image data
+ * This method must not panic if it should fail!
+ **/
+void* CScreenDeviceHelper::AddressFirstPixel() const
+ {
+ TInt bufferStartAddress = iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField];
+ TInt ret = KErrNone;
+ if (iHasChunk)
+ {
+ // The "chunk" way to do this is to get the handle of the chunk, and then the base address of the
+ // chunk itself.
+ bufferStartAddress = (TInt)iChunk.Base();
+ }
+ else
+ {
+ // Chunk not supported, use older HAL call to get the buffer address.
+ ret = HAL::Get(ScreenNumber(),HALData::EDisplayMemoryAddress,bufferStartAddress);
+ if (ret!=KErrNone)
+ {
+ return 0;
+ }
+ }
+ TInt bufferOffsetFirstPixel = iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField];
+ ret = HAL::Get(ScreenNumber(),HALData::EDisplayOffsetToFirstPixel,bufferOffsetFirstPixel);
+ if (ret!=KErrNone)
+ {
+ return 0;
+ }
+ return (void*)(bufferStartAddress+bufferOffsetFirstPixel);
+ }
+
+/**
+Returns the current device width/height flip state of this surface, representing a +/-90 deg rotation.
+**/
+TBool CScreenDeviceHelper::DeviceFlipped() const
+ {
+ return (iSurface.iInternal[TSurfaceId::TScreenSurfaceUsage::EHalField] & TSurfaceId::TScreenSurfaceUsage::EHalFlippedFlag) != 0; //!=0 forces true --> 1
+ }
+
+
+/**
+Returns the current device orientation.
+*/
+TDeviceOrientation CScreenDeviceHelper::DeviceOrientation() const
+ {
+ return iAssignedOrientation;
+ }
+/** Returns an accurate scaling factor between twips and pixels in width.
+
+ **/
+TInt CScreenDeviceHelper::HorzTwipsPerThousandPixels(const TSize& aPixels)const
+ {
+ __ASSERT_DEBUG(aPixels.iWidth, Panic(EScreenDriverPanicInvalidSize));
+
+ TInt width = 0;
+ TInt r = HAL::Get(ScreenNumber(), SecondIfFlipped(HAL::EDisplayXTwips,HAL::EDisplayYTwips), width);
+ __ASSERT_DEBUG(r==KErrNone && width!=0, Panic(EScreenDriverPanicInvalidHalValue));
+
+ return (width * 1000) / aPixels.iWidth;
+ }
+/** Returns an accurate scaling factor between twips and pixels in height.
+ **/
+TInt CScreenDeviceHelper::VertTwipsPerThousandPixels(const TSize& aPixels)const
+ {
+ __ASSERT_DEBUG(aPixels.iHeight, Panic(EScreenDriverPanicInvalidSize));
+
+ TInt height = 0;
+ TInt r = HAL::Get(ScreenNumber(), SecondIfFlipped(HAL::EDisplayYTwips,HAL::EDisplayXTwips), height);
+ __ASSERT_DEBUG(r==KErrNone && height!=0, Panic(EScreenDriverPanicInvalidHalValue));
+
+ return (height * 1000) / aPixels.iHeight;
+ }
+
+