/*

* Copyright (c) 2006-2007 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:   Class HuiVg10VGImageBinder

*

*/

#include "HuiVg10VgImageBinder.h"

#include "HuiVg10RenderPlugin.h"

#include "uiacceltk/HuiUtil.h"

CHuiVg10VgImageBinder::CHuiVg10VgImageBinder(CHuiVg10RenderPlugin* aRenderPlugin):

    iRenderPlugin(aRenderPlugin)

    {

    }

void CHuiVg10VgImageBinder::ConstructL()

    {

    }

CHuiVg10VgImageBinder::~CHuiVg10VgImageBinder()

    {

    if (iEglPBufferSurface_Client)

        {

        eglDestroySurface( iRenderPlugin->EglDisplay(), iEglPBufferSurface_Client );

        iEglPBufferSurface_Client = EGL_NO_SURFACE;

        }

    // Not owned, don't delete.

    iRenderPlugin = NULL;

    }

CHuiVg10VgImageBinder* CHuiVg10VgImageBinder::NewL(CHuiVg10RenderPlugin* aRenderPlugin)

    {   

    CHuiVg10VgImageBinder* self = new (ELeave) CHuiVg10VgImageBinder(aRenderPlugin);

    self->ConstructL();

    return self;

    }

TInt CHuiVg10VgImageBinder::BindClientBuffer(TUint aBuffer)

    {

    // Check whether we should use the Alpha format bit

    VGImageFormat imageFormat = (VGImageFormat)vgGetParameteri(aBuffer, VG_IMAGE_FORMAT);

    TInt maskBit = 0;

    if (imageFormat == VG_sRGBA_8888_PRE)

        {

        maskBit = EGL_VG_ALPHA_FORMAT_PRE_BIT;

        }

    const TInt BITS_PER_CHANNEL = 8;

    // Choose an EGL config

    const EGLint attrs[] =

        {

        EGL_RENDERABLE_TYPE,    EGL_OPENVG_BIT,

        EGL_SURFACE_TYPE,       EGL_PBUFFER_BIT | maskBit,

        EGL_RED_SIZE,           BITS_PER_CHANNEL,

        EGL_GREEN_SIZE,         BITS_PER_CHANNEL,

        EGL_BLUE_SIZE,          BITS_PER_CHANNEL,

        EGL_ALPHA_SIZE,         BITS_PER_CHANNEL,

        EGL_NONE

        };

    // Create a context

    TInt configCount = iRenderPlugin->EglChooseConfig(attrs);

    EGLConfig config = iRenderPlugin->EglConfig(0);

    // Create a pbuffer surface

    iEglPBufferSurface_Client = eglCreatePbufferFromClientBuffer(iRenderPlugin->EglDisplay(),

            EGL_OPENVG_IMAGE, 

            static_cast<EGLClientBuffer>(aBuffer),    // Use the param image as buffer

            config, NULL);

    if (iEglPBufferSurface_Client == EGL_NO_SURFACE)

        {

        HUI_DEBUG1(_L("CHuiVg10VgImageBinder::BindClientBuffer() - EGL Surface could not be created, eglErr: %04x"), eglGetError() );

        return KErrGeneral;

        }

    // Save current context and surfaces

    iSavedContext = eglGetCurrentContext();

    iSavedDrawSurface = eglGetCurrentSurface(EGL_DRAW);

    iSavedReadSurface = eglGetCurrentSurface(EGL_READ);

    EGLContext context = iRenderPlugin->EglSharedContext();

    // Bind our own PBuffer surface (from VGImage)

    if ( eglMakeCurrent(iRenderPlugin->EglDisplay(), iEglPBufferSurface_Client, iEglPBufferSurface_Client, context /*iSavedContext*/) == EGL_FALSE )

        {

        HUI_DEBUG1(_L("CHuiVg10VgImageBinder::BindClientBuffer() - EGL Surface could not be made current, eglErr: %04x"), eglGetError());

        return KErrGeneral;

        }

    // Alles in Ordnung!

    return KErrNone;

    }

TInt CHuiVg10VgImageBinder::UnBindClientBuffer()

    {

    if ( eglMakeCurrent(iRenderPlugin->EglDisplay(), iSavedDrawSurface, iSavedReadSurface, iSavedContext) == EGL_FALSE )

        {

        HUI_DEBUG1(_L("CHuiVg10VgImageBinder::BindClientBuffer() - EGL Surface could not be made current, eglErr: %04x"), eglGetError());

        return KErrGeneral;

        }

    iSavedDrawSurface = 0;

    iSavedReadSurface = 0;

    iSavedContext = 0;

    if (iEglPBufferSurface_Client)

        {

        eglDestroySurface( iRenderPlugin->EglDisplay(), iEglPBufferSurface_Client );

        iEglPBufferSurface_Client = EGL_NO_SURFACE;

        }

    // Everything went fine

    return KErrNone;

    }

// End of file