/*

* Copyright (c) 2008 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 "HuiFxVg10FilterBase.h"

#include "uiacceltk/HuiUtil.h"

//_LIT(KLitPanicMessage, "HuiFx");

TBool CHuiFxVg10FilterBase::Draw(CHuiFxEngine& aEngine, CHuiGc& /* aGc */, CHuiFxRenderbuffer& aTarget, CHuiFxRenderbuffer& aSource,

                                            const TRect& aTargetRect, const TRect& aSourceRect)

    {

    aTarget.BindAsTexture(ERenderbufferUsageWriteOnly);

    aSource.BindAsTexture(ERenderbufferUsageReadOnly);

    VGImage srcImage  = (reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aSource))->AcquireSubImage(aSourceRect);

    VGImage destImage = (reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aTarget))->AcquireSubImage(aTargetRect);

    // take opacity into account

    const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f);

    if(opacity > EPSILON)

        {

        DrawEffect(aEngine, destImage, srcImage, aSourceRect.Width(), aSourceRect.Height());

        }

    else

        {

//        VGint width = vgGetParameteri(srcImage, VG_IMAGE_WIDTH);

//        VGint height = vgGetParameteri(srcImage, VG_IMAGE_HEIGHT);

        VGint width = aSourceRect.Width();

        VGint height = aSourceRect.Height();

        vgCopyImage(destImage, 0, 0, srcImage, 0, 0, width, height, VG_FALSE);

        }

    HUIFX_VG_INVARIANT();    

    (reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aSource))->ReleaseSubImage(srcImage);

    (reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aTarget))->ReleaseSubImage(destImage);

    aTarget.UnbindAsTexture();

    aSource.UnbindAsTexture();

    return wasEnoughMemory();

    }

// any unexpected error results in panic

TBool CHuiFxVg10FilterBase::wasEnoughMemory()

    {

#ifndef _DEBUG

	// vgGetError() -call is REALLY SLOW on HW, remove for now at least,

	// since nobody is really even checking this return value nor acting on it..

    TBool success = ETrue;

#else

    TBool success = EFalse;

    const VGErrorCode vgError = vgGetError();

    switch(vgError)

        {

        case VG_NO_ERROR : 

            success = ETrue;

            break;

        case VG_OUT_OF_MEMORY_ERROR : 

            success = EFalse;

            break;

        default :

            success = EFalse;

            // should print an error instead of panicking

            HUI_DEBUG1(_L("CHuiFxVg10FilterBase::wasEnoughMemory() vgError -- %04x"), vgError);

//            User::Panic(KLitPanicMessage, vgError);

        }

#endif

    return success;

    }