graphicscomposition/surfaceupdate/tsrc/tsurfacehelper.cpp
author William Roberts <williamr@symbian.org>
Thu, 03 Jun 2010 17:39:46 +0100
branchNewGraphicsArchitecture
changeset 87 0709f76d91e5
parent 0 5d03bc08d59c
permissions -rw-r--r--
Add MMP files to build libOpenVG_sw.lib which uses LINKAS to redirect to libOpenVG.dll (and the same for libEGL_sw.lib and libOpenVGU_sw.lib). Only the libEGL_sw.lib redirection isn't activated - this can't happen until there is a merged libEGL.dll which supports the OpenWF synchronisation and also implements the graphical support functions. The overall aim is to eliminate the *_sw.dll implementations, at least as a compile-time way of choosing a software-only implementation.The correct way to choose is to put the right set of libraries into a ROM with suitable renaming, and in the emulator to use the "switching DLL" technique to pick the right set. As the Symbian Foundation doesn't have any alternative implementations, we don't need the switching DLLs and we can build directly to the correct name.

// Copyright (c) 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:
//

#include "tsurfacehelper.h"
#include <w32std.h>

CSurfaceHelper* CSurfaceHelper::NewL()
	{
	CSurfaceHelper* helper = new(ELeave)CSurfaceHelper;
	CleanupStack::PushL(helper);
	helper->ConstructL();
	CleanupStack::Pop(helper);
	return helper;
	}

CSurfaceHelper::~CSurfaceHelper()
	{
	DestroySurfaces();
	iSurfaces.Close();
	iManager.Close();
	}

/**
 * Load logical device and open a surface manager
 */
void CSurfaceHelper::ConstructL()
	{
	TInt res = iManager.Open();
	if (res != KErrNone)
		{
		User::Leave(res);
		}
	}

/**
 * Create the surface with the given parameters.
 * The surface will be owned by the instance of this class  
 */
TSurfaceId CSurfaceHelper::CreateSurfaceL(const TSize& aSize, TUidPixelFormat aPixelFormat, TInt aStride, TInt aBuffers)
	{
	RSurfaceManager::TSurfaceCreationAttributesBuf bf;
	RSurfaceManager::TSurfaceCreationAttributes& b = bf();
	
	b.iSize.iWidth = aSize.iWidth;
	b.iSize.iHeight = aSize.iHeight;
	b.iBuffers = aBuffers;				// number of buffers in the surface
	b.iPixelFormat = aPixelFormat;
	b.iStride = aStride;		// Number of bytes between start of one line and start of next
	b.iOffsetToFirstBuffer = 0;	// way of reserving space before the surface pixel data
	b.iAlignment = 4;			// alignment, 1,2,4,8 byte aligned
	b.iContiguous = EFalse;
	b.iMappable = ETrue;

	TSurfaceId surface = TSurfaceId::CreateNullId();

	User::LeaveIfError(iManager.CreateSurface(bf, surface));
	iSurfaces.AppendL(surface);
	return surface;
	}

/**
 * Destroy all surfaces wich have been created by the instance of this class
 */
void CSurfaceHelper::DestroySurfaces()
	{
	TInt numSurfaces = iSurfaces.Count();
	for (TInt index = 0; index < numSurfaces; index++)
		{
		TSurfaceId surfaceId = iSurfaces[index];
		TInt err = iManager.CloseSurface(surfaceId);
		__ASSERT_DEBUG(err ==KErrNone, User::Panic(_L("CSurfaceHelper::DestroySurfaces"), err));
		}
	iSurfaces.Reset();
	}

/**
Fill a rectangle on the given surface.

@param aSurface		The surface to be filled.
@param aStartPos	Where to place the rectangle.
@param aSize		Size of the rectangle.
@param aColor		The colour to fill it with.
*/
void CSurfaceHelper::FillRectangleL(const TSurfaceId& aSurface, const TPoint& aStartPos, const TSize& aSize, const TRgb& aColor)
	{
	RSurfaceManager::TInfoBuf infoBuf;
	RSurfaceManager::TSurfaceInfoV01& info = infoBuf();
	User::LeaveIfError(iManager.SurfaceInfo(aSurface, infoBuf));
	TUint32 color = 0;

	if (info.iSize.iHeight<0 || info.iSize.iWidth<0 || info.iStride<0)
		{
		User::Leave(KErrCorrupt);
		}
	if (info.iSize.iHeight==0 || info.iSize.iWidth==0 || info.iStride==0)
		{
		User::Leave(KErrNotReady);
		}

	switch (info.iPixelFormat)
		{
		case EUidPixelFormatXRGB_8888:
			{
			color = aColor.Color16MU();
#ifdef ALPHA_FIX_24BIT
			color |= ((ALPHA_FIX_24BIT)&0xff)<<24;
#endif
			break;
			}
		case EUidPixelFormatARGB_8888:
			{
			color = aColor.Color16MA();
			break;
			}
		case EUidPixelFormatARGB_8888_PRE:
			{
			color = aColor.Color16MAP();
			break;
			}
		case EUidPixelFormatRGB_565:
			{
			color = aColor.Color64K();
			break;
			}
		default:
			{
			User::Leave(KErrNotSupported);
			break;
			}
		}

	RChunk chunk;
	User::LeaveIfError(iManager.MapSurface(aSurface, chunk));
	CleanupClosePushL(chunk);
	TUint8* surfacePtr = chunk.Base();
	
	// Check for out of bounds
	TBool validRect = ETrue;
	TInt surfaceWidth = info.iSize.iWidth;
	TInt surfaceHeight = info.iSize.iHeight;
	
	// Width and Height
	if ((aStartPos.iX + aSize.iWidth) > surfaceWidth)
		{
		validRect = EFalse;
		}
	
	if ((aStartPos.iY + aSize.iHeight) > surfaceHeight)
		{
		validRect = EFalse;
		}
	
	// Starting position
	if ((aStartPos.iX < 0) || (aStartPos.iY < 0))
		{
		validRect = EFalse;
		}
	
	if (!validRect)
		{
		User::Leave(KErrOverflow);
		}
		
	if (info.iPixelFormat == EUidPixelFormatRGB_565)
		{//2 bytes per pixel
		if ( info.iSize.iWidth*2>info.iStride)
			{
			User::Leave(KErrOverflow);
			}
		
		TInt offset;
		User::LeaveIfError(iManager.GetBufferOffset(aSurface, 0, offset));
		TUint16* ptr = reinterpret_cast<TUint16*>(surfacePtr + offset);
		
		// Fill the rectangle
		TInt yPos = aStartPos.iY;
		TInt xPos = aStartPos.iX;
		for (TInt yy = 0; yy < aSize.iHeight; ++yy)
			{
			ptr = reinterpret_cast<TUint16*>(surfacePtr + (yPos*info.iStride));
			for (TInt xx = 0; xx < aSize.iWidth; ++xx)
				{
				ptr[xPos] = color;
				xPos++;
				}
			xPos = aStartPos.iX;
			yPos++;
			}
		}
	else
		{
		if ( info.iSize.iWidth*4>info.iStride)
			{
			User::Leave(KErrOverflow);
			}

		TInt offset;
		User::LeaveIfError(iManager.GetBufferOffset(aSurface, 0, offset));
		TUint32* ptr = reinterpret_cast<TUint32*>(surfacePtr + offset);		
		
		// Fill the rectangle
		TInt yPos = aStartPos.iY;
		TInt xPos = aStartPos.iX;
		for (TInt yy = 0; yy < aSize.iHeight; ++yy)
			{
			ptr = reinterpret_cast<TUint32*>(surfacePtr+(yPos*info.iStride));
			for (TInt xx = 0; xx < aSize.iWidth; ++xx)
				{
				ptr[xPos] = color;
				xPos++;
				}
			xPos = aStartPos.iX;
			yPos++;
			}
		}
	CleanupStack::PopAndDestroy(&chunk);
	}