diff -r bf4420e9fa4d -r 2e16851ffecd browsercore/appfw/ThumbnailEngine/TnEngineGenerator.cpp
--- a/browsercore/appfw/ThumbnailEngine/TnEngineGenerator.cpp	Fri Jun 11 16:23:26 2010 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,405 +0,0 @@
-/*
-* 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 <QPainter>
-#include "qdebug.h"
-
-#include "TnEngineGenerator.h"
-#include "TnEngineHandler.h"
-
-const int KUnscaledBitmapSize = 1024*128; // pixels, = 128kB
-#if defined Q_WS_MAC || defined Q_WS_WIN || defined Q_WS_X11
-const int KBufferBitmapSize = 1024*2048;// pixels, = 2MB
-#else
-const int KBufferBitmapSize = 1024*374;// pixels, = 374kB
-#endif
-const int KMaxDocWidth = 1200; // limit the maximum width the TnEngine covers
-const int KExtraUpdateHeightTop = 100; // hq update this much pixels outsize the view
-const int KExtraUpdateHeightBottom = 300; // hq update this much pixels outsize the view
-const int KExtraLQUpdateHeight = 0; // lq update this much pixels outsize the view
-
-namespace WRT {
-
-TnEngineGenerator::TnEngineGenerator(TnEngineHandler& TnEngine)
-: m_TnEngine(&TnEngine),
-m_validLQRegion(QRegion()), m_validHQRegion(QRegion()), m_bufferPos(0, 0), m_docSize(0, 0), m_keepsBitmaps(false)
-{
-    m_unscaledBitmap = 0;
-    m_bufferBitmap = 0;
-    m_asyncUpdateStarted = 0;
-}
-
-void TnEngineGenerator::init()
-{
-    m_scaler = TnEngineScaler::initWithCallback(*this);
-    m_asyncUpdateStarted = new QTimer;
-    connect(m_asyncUpdateStarted, SIGNAL(timeout()), this, SLOT(startAsyncBufferUpdate()));
-}
-
-TnEngineGenerator* TnEngineGenerator::initWithTnEngine(TnEngineHandler& TnEngine)
-{
-    TnEngineGenerator* self = new TnEngineGenerator(TnEngine);
-    self->init();
-    return self;
-}
-
-TnEngineGenerator::~TnEngineGenerator()
-{
-#ifdef __OOM__
-    delete iOOMCollector;
-#endif    
-    deleteUnscaledBitmap();
-    deleteBufferBitmap();
-    delete m_scaler;
-    delete m_asyncUpdateStarted;
-    m_validLQRegion = QRegion();
-    m_validHQRegion = QRegion();
-}
-
-void TnEngineGenerator::scalingCompleted(QPixmap& result, const QRect& targetRect)
-{
-    if (!m_bufferBitmap) {
-        return;
-    }
-    QRect target(targetRect);
-    QRect bufrect(bufferRect());
-    // maybe the buffer has been scrolled out while scaling was going on?
-    if (target.intersects(bufrect)) {
-        // update the valid reqion
-        m_validHQRegion += (target);
-        m_validHQRegion = m_validHQRegion.intersected (bufrect);
-        
-        // blit the newly scaled area to correct position in buffer
-        target.moveTo(target.topLeft()-m_bufferPos);
-        QPainter painter(m_bufferBitmap);
-        painter.drawPixmap(target.topLeft(), result);
-    }
-    // search for next stripe to update
-    bool more = startAsyncBufferUpdate();
-    
-    // delete unscaled bitmap if nothing more to do
-    if (!more && !m_keepsBitmaps) {
-        deleteUnscaledBitmap();
-    }
-    
-    // signal the update
-    m_TnEngine->scaledPageChanged(m_TnEngine->theRect(), !more /*aReady*/, false);
-}
-
-
-void TnEngineGenerator::invalidate()
-{
-    QSize docSize(m_TnEngine->documentSize());
-    // if doc width changes, assume larger changes and invalidate low quality buffer too
-    if (docSize.width()!=m_docSize.width() || (!m_TnEngine->isDocumentComplete() && m_TnEngine->isFullScreenMode()))
-    {
-        m_validLQRegion = QRegion();
-    }
-    m_docSize = docSize;
-    // otherwise only invalidate high quality areas to avoid lq<->hq flicker
-    m_validHQRegion = QRegion();
-}
-
-
-void TnEngineGenerator::update(bool scrolling)
-{
-    bool changes = fastBufferUpdate();
-    if (changes && m_scaler->isActive()) {
-        // fastBufferUpdate uses the same bitmap, scaling op is no longer valid, have to cancel
-        m_scaler->cancel();
-    }
-    // if scaler is already active no need to restart it
-    if (m_TnEngine->isDocumentComplete() && !m_asyncUpdateStarted->isActive()
-#ifdef __OOM__
-        && !iOOMCollector->IsCollecting()
-#endif        
-        ) {
-        m_asyncUpdateStarted->start(0);
-    }
-    if (changes) {
-        m_TnEngine->scaledPageChanged(m_TnEngine->theRect(), true, scrolling);
-    }
-}
-
-
-void TnEngineGenerator::scroll()
-{
-    calcBufferPosition();
-}
-
-
-void TnEngineGenerator::clear()
-{
-    m_scaler->cancel();
-    m_validLQRegion = QRegion();
-    m_validHQRegion = QRegion();
-    if (m_bufferBitmap) {
-        delete m_bufferBitmap;
-        m_bufferBitmap = NULL;
-    }
-    if (m_unscaledBitmap) {
-        delete m_unscaledBitmap;
-    m_unscaledBitmap = NULL;
-    }
-    m_bufferPos = QPoint(0,0);
-    m_docSize = QSize(0,0);
-}
-
-
-void TnEngineGenerator::calcBufferPosition()
-{
-    if (!m_bufferBitmap) {
-        return;
-    }
-    QRect vpr(m_TnEngine->viewportOnTnEngine());
-    QPoint vpc(vpr.center());
-    QRect bufrect(bufferRect());
-    QSize bufsize(bufrect.size());
-    QPoint newPos(bufrect.topLeft());
-    QSize mmdocSize(m_TnEngine->fromDocCoords(m_docSize));
-    
-    // check if view is outside center 1/3 of the buffer
-    if (vpc.y()<m_bufferPos.y()+bufsize.height()/3 ||
-        vpc.y()>m_bufferPos.y()+bufsize.height()*2/3 ) {
-        // recalc new pos
-        newPos.setY(vpc.y() - bufsize.height()/2);
-        if (newPos.y()+bufsize.height()>mmdocSize.height())
-            newPos.setY(mmdocSize.height()-bufsize.height());
-        if (newPos.y()<0)
-            newPos.setY(0);
-    }
-    
-    // scroll the buffer if needed
-    int scrollAmount = newPos.y()-m_bufferPos.y();
-    if (scrollAmount!=0) {
-        // check if we need to move bitmap
-        if (scrollAmount>0 && scrollAmount<bufsize.height()) {
-            // scroll buffer down
-            QRect from (QPoint(0,scrollAmount), QSize(bufsize.width(), bufsize.height()-scrollAmount));
-            // copy area that remains in buffer to a new position
-            QPainter painter(m_bufferBitmap);
-            painter.drawPixmap(QPoint(0,0), *m_bufferBitmap, from);
-        }
-        else if (scrollAmount<0 && (-scrollAmount)<bufsize.height()) {
-            // scroll buffer up
-            QRect from (QPoint(0,0), QSize(bufsize.width(), bufsize.height()+scrollAmount));
-            // copy area that remains in buffer to a new position
-            QPainter painter(m_bufferBitmap);
-            painter.drawPixmap(QPoint(0,-scrollAmount), *m_bufferBitmap, from);
-        }
-        // invalidate the areas that are out from the buffer due to scrolling
-        m_validLQRegion = m_validLQRegion.intersected(bufrect);
-        m_validHQRegion = m_validHQRegion.intersected(bufrect);
-    }
-    m_bufferPos = newPos;
-}
-
-bool TnEngineGenerator::fastBufferUpdate()
-{
-    if (!checkAndCreateBitmaps()) {
-        return false;
-    }
-    
-    bool changes(false);
-    
-    QRect vp(m_TnEngine->viewportOnTnEngine());
-    QRect bufrect(bufferRect());
-    QSize unscaledSize(m_unscaledBitmap->size());
-    
-    QSize targetSize(m_TnEngine->fromDocCoords(unscaledSize));
-    
-    // divide to unscaled bitmap height stripes
-    int ypos = ((vp.top() - KExtraLQUpdateHeight)/targetSize.height())*targetSize.height();
-    int yend(vp.bottom() + KExtraLQUpdateHeight);
-    
-    if (ypos<0) {
-        ypos = 0;
-    }
-    if (yend>bufrect.bottom()) {
-        yend = bufrect.bottom();
-    }
-    // loop over the view area, checking if this stripe needs an update
-    while (ypos<yend) {
-        QRect target(QPoint(0,ypos),targetSize);
-        QRect from(m_TnEngine->toDocCoords(target).topLeft(),unscaledSize);
-        
-        // check if this area is already valid
-        QRegion tempR;
-        tempR += (target);
-        tempR = tempR.intersected(bufrect);
-        tempR = tempR.subtracted (m_validLQRegion);
-        tempR = tempR.subtracted (m_validHQRegion);
-        
-        if (!tempR.isEmpty()) {
-            //  mark area valid
-            m_validLQRegion += target;
-            
-            m_validLQRegion = m_validLQRegion.intersected(bufrect);
-            
-            // if not, get the bitmap from client
-            QPainter unscaledPainter(m_unscaledBitmap);
-            m_TnEngine->drawDocumentPart(unscaledPainter, from);
-            // scale down
-            target.moveTo(target.topLeft()-m_bufferPos);
-            QPainter painter(m_bufferBitmap);
-            painter.drawPixmap(target,*m_unscaledBitmap,QRect(QPoint(0,0), unscaledSize));
-            changes = true;
-        }
-        tempR = QRegion();
-        
-        ypos += targetSize.height();
-    }
-    return changes;
-}
-
-bool TnEngineGenerator::startAsyncBufferUpdate()
-{
-    m_asyncUpdateStarted->stop();
-    
-    if (!checkAndCreateBitmaps()) {
-        return false;
-    }
-    
-    QRect vp(m_TnEngine->viewportOnTnEngine());
-    QRect bufrect(bufferRect());
-    QSize unscaledSize(m_unscaledBitmap->size());
-    
-    QSize targetSize(m_TnEngine->fromDocCoords(unscaledSize));
-    
-    // divide to unscaled bitmap height stripes
-    int ypos(((vp.top() - KExtraUpdateHeightTop)/targetSize.height())*targetSize.height());
-    int yend(vp.bottom() + KExtraUpdateHeightBottom);
-    if (ypos<bufrect.top()) {
-        ypos = bufrect.top();
-    }
-    if (yend>bufrect.bottom()) {
-        yend = bufrect.bottom();
-    }
-    // loop over the view area, searching for a stripe that needs an update
-    while (ypos<yend) {
-        // update this area
-        QRect target(QPoint(0,ypos),targetSize);
-        // from here
-        QRect from(m_TnEngine->toDocCoords(target).topLeft(),unscaledSize);
-        
-        // check if this area is already valid in high quality region
-        QRegion tempR;
-        tempR += (target);
-        tempR = tempR.intersected(bufrect);
-        tempR = tempR.subtracted(m_validHQRegion);
-        if (!tempR.isEmpty()) {
-            tempR = QRegion();
-            // if not, get the bitmap from client
-            QPainter painter(m_unscaledBitmap);
-            m_TnEngine->drawDocumentPart(painter, from);
-            // scale asynchronously
-            m_scaler->startScaling(*m_unscaledBitmap,target);
-            // update started, get out
-            return true;
-        }
-        tempR = QRegion();
-        
-        ypos += targetSize.height();
-    }
-    // nothing to do
-    return false;
-}
-
-bool TnEngineGenerator::checkAndCreateBitmaps()
-{
-#ifdef __OOM__
-    if( iOOMCollector->IsCollecting() ) return false;
-#endif
-    
-    QSize docSize(m_docSize);
-    // minmap won't cover ridiculously wide document fully in horizontal
-    // direction to avoid stripes from getting too wide/low
-    if (docSize.width() > KMaxDocWidth) {
-        docSize.setWidth(KMaxDocWidth);
-    }
-    QSize mmdocSize(m_TnEngine->fromDocCoords(docSize));
-    QSize bufsize(0,0);
-    QSize unscaledsize(0,0);
-    if (mmdocSize.width()>0 && docSize.width()>0) {
-      bufsize = QSize(mmdocSize.width(), qMin(mmdocSize.height(),KBufferBitmapSize/mmdocSize.width()));
-      unscaledsize = QSize(docSize.width(), qMin(docSize.height(),KUnscaledBitmapSize/docSize.width()));
-        if (!m_unscaledBitmap || unscaledsize != m_unscaledBitmap->size()) {
-            // cancel scaling since we might delete the bitmap
-            m_scaler->cancel();
-        }
-    }
-    
-    if (m_TnEngine->checkAndCreateBitmap(bufsize,m_bufferBitmap)) {
-        m_TnEngine->checkAndCreateBitmap(unscaledsize,m_unscaledBitmap);
-    }
-    if( !m_bufferBitmap || !m_unscaledBitmap)
-    {
-        deleteUnscaledBitmap();
-        deleteBufferBitmap();
-    }
-    return ( m_bufferBitmap!=0 ) && ( m_unscaledBitmap!=0 );
-}
-
-void TnEngineGenerator::deleteUnscaledBitmap()
-{
-    // stop scaling
-    m_scaler->cancel();
-    delete m_unscaledBitmap;
-    m_unscaledBitmap = 0;
-}
-
-void TnEngineGenerator::deleteBufferBitmap()
-{
-    delete m_bufferBitmap;
-    m_bufferBitmap = 0;
-}
-
-QRect TnEngineGenerator::bufferRect() const
-{
-    return QRect(m_bufferPos, m_bufferBitmap->size());
-}
-
-void TnEngineGenerator::setKeepsBitmaps(bool keepsBitmaps)
-{
-    m_keepsBitmaps = keepsBitmaps;
-    // delete bitmap if no scaling active
-    if (!m_keepsBitmaps && !m_scaler->isActive()) {
-        deleteUnscaledBitmap();
-    }
-}
-
-bool TnEngineGenerator::keepsBitmaps() const
-{
-    return m_keepsBitmaps;
-}
-
-void TnEngineGenerator::draw(QPainter& gc, const QRect& to) const
-{
-    if (!m_bufferBitmap) {
-        return;
-    }
-    
-    QRect vp(m_TnEngine->viewportOnTnEngine());
-    
-    QRect from(vp.topLeft()-m_bufferPos, to.size());
-    
-    gc.drawPixmap(to.topLeft(), *m_bufferBitmap, from);
-}
-
-}
-