/*

* 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 "hgvgimagepool.h"

#include "trace.h"

HgVgImagePool::HgVgImagePool(int numImages, int imgWidth, int imgHeight, bool alpha)

{

    for (int i = 0; i < numImages; i++)

    {

        VGImage vgimage = vgCreateImage(alpha ? VG_sARGB_8888 : VG_sRGB_565,

            imgWidth, imgHeight,VG_IMAGE_QUALITY_NONANTIALIASED);

        mFreeImages.push_back(vgimage);

    }

}

HgVgImagePool::~HgVgImagePool()

{

    QLinkedList<VGImage>::const_iterator it = mUsedImages.begin();

    while (it != mUsedImages.end())

    {

        vgDestroyImage((*it));

        it++;

    }

    QLinkedList<VGImage>::const_iterator it2 = mFreeImages.begin();

    while (it2 != mFreeImages.end())

    {

        vgDestroyImage((*it2));

        it2++;

    }

}

void HgVgImagePool::releaseImage(VGImage image)

{

    if (image == VG_INVALID_HANDLE)

        return;

    for (QLinkedList<VGImage>::iterator it = mUsedImages.begin();

        it != mUsedImages.end(); ++it)

    {

        if ((*it) == image)

        {

            mUsedImages.erase(it);

            break;

        }

    }

    vgClearImage(image, 0, 0, vgGetParameteri(image, VG_IMAGE_WIDTH), vgGetParameteri(image, VG_IMAGE_HEIGHT));

    mFreeImages.push_back(image);

}

VGImage HgVgImagePool::getImage()

{

    FUNC_LOG

    if (mFreeImages.empty())

    {

        INFO("Hg: Run out of images!");

        // if no free images left, use the one which was allocated

        // longer ago

        QLinkedList<VGImage>::iterator i = mUsedImages.begin();

        VGImage img = *i;

        mUsedImages.erase(i);

        mUsedImages.push_back(img);

        return img;

    }

    QLinkedList<VGImage>::iterator i = mFreeImages.begin();

    VGImage img = *i;

    mUsedImages.push_back(img);

    mFreeImages.erase(i);

    return img;

}