1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 #include "hgvgimagepool.h"

    19 #include "trace.h"

    20 

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

    22 {

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

    24     {

    25         VGImage vgimage = vgCreateImage(alpha ? VG_sARGB_8888 : VG_sRGB_565,

    26             imgWidth, imgHeight,VG_IMAGE_QUALITY_NONANTIALIASED);

    27 

    28         mFreeImages.push_back(vgimage);

    29     }

    30 }

    31 HgVgImagePool::~HgVgImagePool()

    32 {

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

    34     while (it != mUsedImages.end())

    35     {

    36         vgDestroyImage((*it));

    37         it++;

    38     }

    39 

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

    41     while (it2 != mFreeImages.end())

    42     {

    43         vgDestroyImage((*it2));

    44         it2++;

    45     }

    46 

    47 }

    48 void HgVgImagePool::releaseImage(VGImage image)

    49 {

    50     if (image == VG_INVALID_HANDLE)

    51         return;

    52 

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

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

    55     {

    56         if ((*it) == image)

    57         {

    58             mUsedImages.erase(it);

    59             break;

    60         }

    61     }

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

    63     mFreeImages.push_back(image);

    64 }

    65 

    66 VGImage HgVgImagePool::getImage()

    67 {

    68     FUNC_LOG

    69 

    70     if (mFreeImages.empty())

    71     {

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

    73 

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

    75         // longer ago

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

    77         VGImage img = *i;

    78         mUsedImages.erase(i);

    79         mUsedImages.push_back(img);

    80         return img;

    81     }

    82 

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

    84     VGImage img = *i;

    85     mUsedImages.push_back(img);

    86     mFreeImages.erase(i);

    87 

    88     return img;

    89 }