/*

* Copyright (c) 2002 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:    CSvgtFbsRasterizer implementation.

*

*/

#include "SvgtFbsRasterizer.h"

#include "fbsrasterizerpanics.h"

#include "SvgtRegisteredBitmap.h"

#include "svgtgraphicsinterface.h"

#include <e32std.h>

#include <nvg.h>

#include <AknIconHeader.h>

#include <AknIconUtils.h>

#include <vgcontext.h>

#include <e32cmn.h>

#include <bitstd.h>

#include <bitdev.h>

TBool operator==(const CFbsRasterizer::TBitmapDesc& aBitmapDesc1, 

				 const CFbsRasterizer::TBitmapDesc& aBitmapDesc2)

	{

	return ((&aBitmapDesc1 == &aBitmapDesc2)

			|| (aBitmapDesc1.iSizeInPixels == aBitmapDesc2.iSizeInPixels

				&& aBitmapDesc1.iDispMode == aBitmapDesc2.iDispMode

				&& aBitmapDesc1.iDataType == aBitmapDesc2.iDataType

				&& aBitmapDesc1.iData == aBitmapDesc2.iData

				&& aBitmapDesc1.iDataSize == aBitmapDesc2.iDataSize));	

	}

void CleanupVGImage( TAny* aObj )

    {

    VGImage * imageToDestroy = reinterpret_cast<VGImage *>(aObj); 

    if (imageToDestroy && *imageToDestroy != VG_INVALID_HANDLE)

        {

        vgDestroyImage(*imageToDestroy);

        }

    }

/** Create a new rasterizer.

@return A pointer to a newly constructed CFbsRasterizer object if successful,

or NULL if no memory is available.

 */

EXPORT_C CFbsRasterizer* CSvgtFbsRasterizer::New()

	{

	CSvgtFbsRasterizer* self = new CSvgtFbsRasterizer;

	if ( self )

	    {

	    self->InitializeRasterizer();

	    }

	return self;

	}

/** Constructor */

CSvgtFbsRasterizer::CSvgtFbsRasterizer()

CSvgtFbsRasterizer::~CSvgtFbsRasterizer()

    {

    while (!iRegisteredBmps.IsEmpty())

        {

        delete iRegisteredBmps.First();

        }

    while (!iRecentBmps.IsEmpty())

        {

        delete iRecentBmps.First();

        }

    delete iNvgEngine;

    delete iGraphicsInterface;

    if ( iMatricesUpdated )

        {

        RestoreMatrices();

        }

    }

/** Register a bitmap with this rasterizer for rendering. In this example the extended 

bitmap data is just a buffer that is copied when BeginBitmap() is called and deleted when

EndBitmap() is called for the same bitmap. The only display modes supported by this example

raterizer are EColor16MU and EColor16MA

*/

void CSvgtFbsRasterizer::BeginBitmap(TInt64 aBitmapId, const TBitmapDesc& aBitmapDesc, const TRegion* aRegionOfInterest)

	{

	TRAPD(beginErr, DoBeginBitmapL(aBitmapId, aBitmapDesc, aRegionOfInterest));

	// If there is error in begin, the consecutive fulction calls should be invalid.

	iIsRasterizerValidState = ( beginErr == KErrNone); 

	}

void CSvgtFbsRasterizer::DoBeginBitmapL(TInt64 aBitmapId, const TBitmapDesc& aBitmapDesc,

        const TRegion* /* aRegionOfInterest */)

    {

    // Check that the passed extended bitmap description is valid

    if ((aBitmapDesc.iSizeInPixels.iWidth <= 0) || (aBitmapDesc.iSizeInPixels.iHeight <= 0)

            || (aBitmapDesc.iDataType != KUidNvgProprietaryFormat)

            || (!aBitmapDesc.iData )

            || (aBitmapDesc.iDataSize <= 0))

        {

        return;

        }

    // Check if the bitmap is already registered

    CSvgtRegisteredBitmap* foundRegBmp = RegisteredBitmap(aBitmapId);

    if (!foundRegBmp)

        {

        // Not registered: check if the bitmap is in the cache of recently used bitmaps

        foundRegBmp = RecentBitmap(aBitmapId);

        if (foundRegBmp)

            {

            // Take the bitmap out of the cache and put it in the list of registered bitmaps

            foundRegBmp->iLink.Deque();

            iTotalRecentBmpSize -= foundRegBmp->DataSize();

            iRegisteredBmps.AddLast(*foundRegBmp);

            }

        }

    if (foundRegBmp)

        {

        // This bitmap is already registered, just increment its reference count and return

        foundRegBmp->iRefCount++;

        return;

        }

    CSvgtRegisteredBitmap* regBmp = new CSvgtRegisteredBitmap(aBitmapId);

    if (!regBmp)

        {

        return;

        }

    TRAPD(err, RenderL(aBitmapDesc, *regBmp));

    if (err != KErrNone)

        {

        delete regBmp;

        return;

        }

    // Success

    iRegisteredBmps.AddLast(*regBmp);

    regBmp->iRefCount = 1;

    }

/** Unregister an extended bitmap from this rasterizer. 

@see CFbsRasterizer::EndBitmap()

@see BeginBitmap()

 */

void CSvgtFbsRasterizer::EndBitmap(TInt64 aBitmapId)

	{

	CSvgtRegisteredBitmap* regBmp = RegisteredBitmap(aBitmapId);

	    if (regBmp)

	        {

	        if (--regBmp->iRefCount == 0)

	            {

            // Put unregistered bitmap in the cache of recently used bitmaps if wholly pre-rendered

            // and there is an active scheduler to add the idle-time clean-up active object to

            regBmp->iLink.Deque();

            if (regBmp->DataSize() <= iCacheLimit)

                {

                iRecentBmps.AddFirst(*regBmp);

                iTotalRecentBmpSize += regBmp->DataSize();

                }

            else

                {

                delete regBmp; // deleting the registered bitmap in a case when raster bitmap size is bigger than cache

                }	

            // Delete the least recently used bitmaps if the maximum size of the cache is exceeded

            while (iTotalRecentBmpSize > iCacheLimit)

                {

                regBmp = iRecentBmps.Last();

                iTotalRecentBmpSize -= regBmp->DataSize();

                delete regBmp;

                }

            }

        }

    }

/** Return a scanline from the passed extended bitmap given it's bitmap id. 

 */

const TUint32* CSvgtFbsRasterizer::ScanLine(TInt64 aBitmapId, const TPoint& aPixel, TInt aLength)

	{

	CSvgtRegisteredBitmap* regBmp = RegisteredBitmap(aBitmapId);

    if (!regBmp)

        {

        return NULL;

        }

    if (!TRect(regBmp->SizeInPixels()).Contains(aPixel)

        || (aLength > (regBmp->SizeInPixels().iWidth - aPixel.iX)))

        {

        return NULL;

        }

    return PtrAdd(regBmp->DataAddress(), aPixel.iY * regBmp->DataStride());

	}

/**  No extension interaces are available, KErrNotSupported for all aInterfaceId passed.

@see CFbsRasterizer::GetInterface()

 */

/** Gets a bitmap that has been registered with this rasterizer.

@param aBitmapId The ID of the bitmap to check for.

@return A pointer to the registered bitmap if found, NULL otherwise.

 */

CSvgtRegisteredBitmap* CSvgtFbsRasterizer::RegisteredBitmap(TInt64 aBitmapId)

    {

    TDblQueIter<CSvgtRegisteredBitmap> iter(iRegisteredBmps);

    while (CSvgtRegisteredBitmap* regBmp = iter++)

        {

        if (regBmp->iBitmapId == aBitmapId)

            {

            return regBmp;

            }

        }

    return NULL;

    }

/** Gets a bitmap that has been recently used with this rasterizer.

@param aBitmapId The ID of the bitmap to check for.

@return A pointer to the recently used bitmap if found, NULL otherwise.

 */

CSvgtRegisteredBitmap* CSvgtFbsRasterizer::RecentBitmap(TInt64 aBitmapId)

    {

    TDblQueIter<CSvgtRegisteredBitmap> iter(iRecentBmps);

    while (CSvgtRegisteredBitmap* regBmp = iter++)

        {

        if (regBmp->iBitmapId == aBitmapId)

            {

            return regBmp;

            }

        }

    return NULL;

    }

void CSvgtFbsRasterizer::InitializeRasterizer()

    {

    }

void CSvgtFbsRasterizer::RenderBitmapL(CSvgtRegisteredBitmap& aPixMap, CFbsBitmap * aMask, 

                                        const TBitmapDesc& aBitmapDesc, TPtr8& aDataPtr8, TAknIconHeader& aIconHeader)

    {

    TSize newSize = aBitmapDesc.iSizeInPixels;

    UpdateMatrices();

    iMatricesUpdated = ETrue;

    TBool isMargin = aIconHeader.IsMarginCorrection();

    VGImage vgImage = VG_INVALID_HANDLE;

    if (isMargin)

        {

        vgImage = vgCreateImage((VGImageFormat)  VG_sRGBA_8888_PRE , aBitmapDesc.iSizeInPixels.iWidth,

                                    aBitmapDesc.iSizeInPixels.iHeight, VG_IMAGE_QUALITY_NONANTIALIASED);

        if (vgImage == VG_INVALID_HANDLE)

            {

            User::LeaveIfError(MapOpenVgErrorCodeToSymbian(vgGetError()));

            }

        CleanupStack::PushL( TCleanupItem( CleanupVGImage, &vgImage ) );

        iGraphicsInterface->BindClientBuffer(vgImage);

        }

    User::LeaveIfError(iNvgEngine->DrawNvg(aDataPtr8, newSize, &aPixMap, aMask));

    if(isMargin)

        {

        iGraphicsInterface->UnBindClientBuffer(); 

        newSize = ApplyMarginL(vgImage, aBitmapDesc.iSizeInPixels);

        if(newSize!=aBitmapDesc.iSizeInPixels)

        		{

        		User::LeaveIfError(iNvgEngine->DrawNvg(aDataPtr8, newSize, &aPixMap, aMask));

       		  }

       	else

       		  {

       		  vgDrawImage(vgImage);

       		  User::LeaveIfError(MapOpenVgErrorCodeToSymbian(vgGetError()));

            }

        CleanupStack::PopAndDestroy();

        }

    iGraphicsInterface->CopyBitmapL(&aPixMap, aMask);

    TUint32 iconColor = aIconHeader.GetIconColor();

    if (iconColor & 0xFFFFFF)

        {

        CFbsBitmapDevice* dev = CFbsBitmapDevice::NewL( &aPixMap );

        CleanupStack::PushL( dev );

        CFbsBitGc* gc = NULL;

        User::LeaveIfError( dev->CreateContext( gc ) );

        CleanupStack::PushL( gc );

        TRgb color(iconColor);          

        gc->SetBrushColor( color );

        gc->SetPenStyle( CGraphicsContext::ENullPen );

        gc->SetBrushStyle( CGraphicsContext::ESolidBrush );

        // Fill icon with the given color, mask defines the icon shape.

        TPoint origin(0, 0);

        if (newSize != aBitmapDesc.iSizeInPixels)

            {

            origin = TPoint((aBitmapDesc.iSizeInPixels.iWidth - newSize.iWidth)/2 , (aBitmapDesc.iSizeInPixels.iHeight - newSize.iHeight)/2  );

            }

        gc->DrawRect( TRect( origin, newSize ) );

        CleanupStack::PopAndDestroy( 2 ); // dev, gc

        }

    }

void CSvgtFbsRasterizer::RenderMaskL(CSvgtRegisteredBitmap& aPixMap, CFbsBitmap * aMask, 

                                      const TBitmapDesc& aBitmapDesc, TPtr8& aDataPtr8, TAknIconHeader& aIconHeader)

    {

    UpdateMatrices();

    iMatricesUpdated = ETrue;

    TBool isMargin = aIconHeader.IsMarginCorrection();

    VGImage vgImage = VG_INVALID_HANDLE;

    if (isMargin)

        {

        vgImage = vgCreateImage((VGImageFormat)  VG_sRGBA_8888_PRE , aBitmapDesc.iSizeInPixels.iWidth, 

                                     aBitmapDesc.iSizeInPixels.iHeight, VG_IMAGE_QUALITY_NONANTIALIASED);

        if (vgImage == VG_INVALID_HANDLE)

            {

            User::LeaveIfError(MapOpenVgErrorCodeToSymbian(vgGetError()));

            }

        CleanupStack::PushL( TCleanupItem( CleanupVGImage, &vgImage ) );

        iGraphicsInterface->BindClientBuffer(vgImage);

        }

    VGfloat color[4] = { 0.0f, 0.0f, 0.0f, 0.0f };

    vgSeti(VG_SCISSORING, VG_FALSE);

    vgSetfv(VG_CLEAR_COLOR, 4, color);

    vgClear(0, 0, aBitmapDesc.iSizeInPixels.iWidth, aBitmapDesc.iSizeInPixels.iHeight);

    User::LeaveIfError(iNvgEngine->DrawNvg(aDataPtr8, aBitmapDesc.iSizeInPixels, &aPixMap, aMask));

    if (isMargin)

        {

        iGraphicsInterface->UnBindClientBuffer();

        TSize newSize = ApplyMarginL(vgImage, aBitmapDesc.iSizeInPixels);

        if(newSize!=aBitmapDesc.iSizeInPixels)

        		{

        		User::LeaveIfError(iNvgEngine->DrawNvg(aDataPtr8, newSize, &aPixMap, aMask));

       		  }

       	else

       		  {

       		  vgDrawImage(vgImage);

       		  User::LeaveIfError(MapOpenVgErrorCodeToSymbian(vgGetError()));

            }

        CleanupStack::PopAndDestroy();

        }

    TSize bitmapSize = aPixMap.SizeInPixels();

    const TInt KOriginalFilterMasks = vgGeti( VG_FILTER_CHANNEL_MASK );

    vgSeti( VG_FILTER_CHANNEL_MASK, VG_ALPHA );

    const TInt KStride = CFbsBitmap::ScanLineLength(bitmapSize.iWidth, aPixMap.DisplayMode());

    VGImageFormat format = ( aPixMap.DisplayMode() == EGray256 ) ? VG_A_8 : VG_BW_1;

    aPixMap.BeginDataAccess();

    TUint * data = (TUint*)((TUint)aPixMap.DataAddress() + ( KStride * ( aPixMap.SizeInPixels().iHeight - 1  ) ) );

    vgReadPixels( data, -KStride, format, 0, 0, bitmapSize.iWidth, bitmapSize.iHeight );

    aPixMap.EndDataAccess();

    vgSeti( VG_FILTER_CHANNEL_MASK, KOriginalFilterMasks );

    }

void CSvgtFbsRasterizer::RenderL( const TBitmapDesc& aBitmapDesc, CSvgtRegisteredBitmap& aBitmap  )

    {

    iIsRasterizerValidState = EFalse;

    User::LeaveIfError(aBitmap.Create(aBitmapDesc.iSizeInPixels, aBitmapDesc.iDispMode));

    if (!iGraphicsInterface)

        {

        iGraphicsInterface = CSvgtGraphicsInterface::CreateImplementationL();

        }

    iGraphicsInterface->InitializeL(aBitmapDesc.iSizeInPixels);

    iIsRasterizerValidState  = ETrue;

    TPtr8 bmpDataPtr8((TUint8*)aBitmapDesc.iData, aBitmapDesc.iDataSize);

    if (!iNvgEngine)

        {

        iNvgEngine = CNvgEngine::NewL();

        }

    iNvgEngine->SetVGImageBinder(iGraphicsInterface);

    TUint8 *temp = (TUint8 *)bmpDataPtr8.Ptr();

    TPtr8 IconHeaderPtr(temp, KIconHeaderLength, KIconHeaderLength);

    TAknIconHeader iconheader(IconHeaderPtr);

    //skipping header bytes

    temp = temp + KIconHeaderLength;

    TPtr8 newDataPtr8(temp, (bmpDataPtr8.MaxLength() - KIconHeaderLength), (bmpDataPtr8.MaxLength() - KIconHeaderLength));

    CFbsBitmap* mask = NULL;

    VGfloat color[4] = { 1.0f, 1.0f, 1.0f, 0.0f };

    vgSeti(VG_SCISSORING, VG_FALSE);

    vgSetfv(VG_CLEAR_COLOR, 4, color);

    vgClear(0, 0, aBitmapDesc.iSizeInPixels.iWidth, aBitmapDesc.iSizeInPixels.iHeight);

    vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);

    vgLoadIdentity();

    vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);

    vgLoadIdentity();

    TInt rotAngle = iconheader.GetRotation();

    // setting the rotation angle

    iNvgEngine->Rotate(-rotAngle,  aBitmapDesc.iSizeInPixels.iWidth >> 1,aBitmapDesc.iSizeInPixels.iHeight >>1);

    //setting preserve aspect ratio

    TNvgAlignStatusType alignTypeValue = ENvgPreserveAspectRatio_XmidYmid;

    TNvgMeetOrSliceType meetOrSliceTypeValue = ENvgMeet;

    switch ( iconheader.GetScaleMode() )

        {

        case EAspectRatioPreserved: // fall through

            {

            // use default

            break;

            }

            // Ensures NVG content fully covers the area of the icon whilst preserving aspect ratio.

        case EAspectRatioPreservedSlice:

            {

            // alignTypeValue use default

            meetOrSliceTypeValue = ENvgSlice;

            break;

            } 

            /* EAspectRatioPreservedAndUnusedSpaceRemoved is mapped to the same values as EAspectRatioNotPreserved

             * because we already have a frame buffer with the dimensions that preserves the aspect ratio.

             * This mapping ensures that NVG engine does not calculate aspect ratio twice and potentially resulting in precision loss.*/

        case EAspectRatioPreservedAndUnusedSpaceRemoved:                        

        case EAspectRatioNotPreserved:

            {            

            alignTypeValue = ENvgPreserveAspectRatio_None;

            // meetOrSliceTypeValue use default

            break;

            }

        default:

            {

            User::Leave(KErrCorrupt);

            }

        }    

    iNvgEngine->SetPreserveAspectRatio(alignTypeValue, meetOrSliceTypeValue);

    iMatricesUpdated = EFalse;

    if (iconheader.IsMask())

        {

        RenderMaskL(aBitmap, mask, aBitmapDesc, newDataPtr8, iconheader);

        }

    else

        {

        RenderBitmapL(aBitmap, mask, aBitmapDesc, newDataPtr8, iconheader);

        }

    if ( iMatricesUpdated )

        {

        RestoreMatrices();

        iMatricesUpdated = EFalse;

        }