--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ganeswidgets/src/hgvgimage.cpp	Mon Apr 19 14:40:06 2010 +0300
@@ -0,0 +1,179 @@
+/*
+* 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 "HgVgImage.h"
+#include "HgImageFader.h"
+#include "hgvgquadrenderer.h"
+
+const int KMaxMirrorWidth(128);
+const int KMaxMirrorHeight(64);
+
+static QSize getMirrorSize(const QImage& image)
+{
+    return QSize(
+        qMin(image.width() / 2, KMaxMirrorWidth), 
+        qMin(image.height() / 4, KMaxMirrorHeight) 
+        );
+}
+
+HgVgImage::HgVgImage(HgVgQuadRenderer* renderer) :
+    mVgImage(VG_INVALID_HANDLE),
+    mMirrorImage(VG_INVALID_HANDLE),
+    mMirrorSize(0,0),
+    mRenderer(renderer)
+{
+    setAlpha(1.0);
+}
+
+HgVgImage::~HgVgImage()
+{
+    releaseImage();
+}
+
+int HgVgImage::width() const
+{
+    return mQImage.width();
+}
+
+int HgVgImage::height() const
+{
+    return mQImage.height();
+}
+
+VGImage HgVgImage::image() const
+{
+    return mVgImage;
+}
+
+int HgVgImage::mirrorImageWidth() const
+{
+    return mMirrorSize.width();
+}
+
+int HgVgImage::mirrorImageHeight() const
+{
+    return mMirrorSize.height();
+}
+    
+VGImage HgVgImage::mirrorImage() const
+{
+    return mMirrorImage;
+}
+
+
+void HgVgImage::setImage(QImage& image)
+{
+    if (image.isNull())
+        return;
+
+    // release previous images vg data
+    releaseImage();
+        
+    mQImage = image;
+
+    mMirrorSize = getMirrorSize(mQImage);
+
+}
+
+void HgVgImage::releaseImage()
+{
+    if (mVgImage != VG_INVALID_HANDLE)
+    {
+        vgDestroyImage(mVgImage);
+        mVgImage = VG_INVALID_HANDLE;            
+    }
+    if (mMirrorImage != VG_INVALID_HANDLE)
+    {
+        vgDestroyImage(mMirrorImage);
+        mMirrorImage = VG_INVALID_HANDLE;            
+    }
+    
+    // TODO, check that this will free all the previously reserved image resources.
+    mQImage = QImage();
+}
+
+void HgVgImage::upload(bool mirror)
+{
+    
+    if (mVgImage == VG_INVALID_HANDLE)
+    {            
+                
+        VGImageFormat format;
+
+        switch (mQImage.format())
+        {
+        case QImage::Format_ARGB32_Premultiplied:
+            format = VG_sARGB_8888_PRE;
+            break;
+        case QImage::Format_ARGB32:
+            format = VG_sARGB_8888;
+            break;
+        case QImage::Format_RGB16:
+            format = VG_sRGB_565;
+            break;
+        default:
+            mQImage = mQImage.convertToFormat(QImage::Format_RGB16);
+            format = VG_sRGB_565;
+            break;
+        }
+        
+
+        mVgImage = vgCreateImage(format, 
+            mQImage.width(), mQImage.height(),VG_IMAGE_QUALITY_NONANTIALIASED);
+        if (mVgImage == VG_INVALID_HANDLE)
+        {
+            qWarning("HgMediaWall run out of video memory for images!");
+            return;
+        }
+        
+        vgImageSubData(mVgImage, mQImage.bits(), mQImage.bytesPerLine(), 
+            format, 0, 0, mQImage.width(), mQImage.height() );        
+    }
+    
+    if (mirror && mMirrorImage == VG_INVALID_HANDLE)
+    {
+        mMirrorImage = vgCreateImage(VG_sARGB_8888_PRE, mMirrorSize.width(), mMirrorSize.height(), VG_IMAGE_QUALITY_NONANTIALIASED);
+        if (mMirrorImage == VG_INVALID_HANDLE)
+        {
+            qWarning("HgMediaWall run out of video memory for images!");
+            return;
+        }
+        
+        // cut half of the image, then scale to desired width/height if needed
+        QImage mirrorImage = mQImage.copy(0, mQImage.height()/2, mQImage.width(), mQImage.height()/2).scaled(mMirrorSize).convertToFormat(QImage::Format_ARGB32);
+        
+        // apply gradient to alpha channel so that mirror image looks like
+        // it fades under the floor
+        for (int i = 0; i < mirrorImage.height(); i++)
+        {
+            qreal t = qreal(i) / qreal(mirrorImage.height());
+            int a = (int)(t * 255.0);
+            for (int j = 0; j < mirrorImage.width(); j++)
+            {
+                QRgb rgb = mirrorImage.pixel(j, i);
+                mirrorImage.setPixel(j, i, qRgba(qRed(rgb), qGreen(rgb), qBlue(rgb), a));
+            }        
+        }
+        
+        // copy data to vg image
+        vgImageSubData(mMirrorImage, mirrorImage.bits(), mirrorImage.bytesPerLine(), 
+            VG_sARGB_8888, 0, 0, mirrorImage.width(), mirrorImage.height() );
+
+    }
+    
+}
+