added missing interface methods for a generic imagedisplay (display

brightness)
apps using that OImageScrollview must rebuild! this will be the last
change of interface for a long time

2 files changed, 123 insertions, 0 deletions

diff --git a/libopie2/opiemm/oimagescrollview.cpp b/libopie2/opiemm/oimagescrollview.cpp
index 37a1ad5..58a9748 100644
--- a/libopie2/opiemm/oimagescrollview.cpp
+++ b/libopie2/opiemm/oimagescrollview.cpp
@@ -1,569 +1,676 @@
 #include "oimagescrollview.h"
 
 #include <opie2/oimagezoomer.h>
 #include <opie2/odebug.h>
 #include <opie2/oapplication.h>
 #include <opie2/owait.h>
 #include <opie2/opieexif.h>
 
 #include <qimage.h>
 #include <qlayout.h>
 
 /* for usage with the bitset */
 #define AUTO_SCALE 0
 #define AUTO_ROTATE 1
 #define SHOW_ZOOMER 2
 #define FIRST_RESIZE_DONE 3
 #define IMAGE_IS_JPEG 4
 #define IMAGE_SCALED_LOADED 5
 
 #define SCROLLVIEW_BITSET_SIZE 6
 
 namespace Opie {
 namespace MM {
 OImageScrollView::OImageScrollView( QWidget* parent, const char* name,  WFlags f )
     :QScrollView(parent,name,f|Qt::WRepaintNoErase ),_image_data(),_original_data(),
     m_states(SCROLLVIEW_BITSET_SIZE),m_lastName("")
 {
     _zoomer = 0;
     m_states[AUTO_SCALE]=true;
     m_states[AUTO_ROTATE]=true;
     m_states[FIRST_RESIZE_DONE]=false;
     m_states[IMAGE_IS_JPEG]=false;
     m_states[IMAGE_SCALED_LOADED]=false;
     m_states[SHOW_ZOOMER]=true;
+    _newImage = true;
     init();
 }
 
 OImageScrollView::OImageScrollView (const QImage&img, QWidget * parent, const char * name, WFlags f,bool always_scale,bool rfit)
     :QScrollView(parent,name,f|Qt::WRepaintNoErase),_image_data(),_original_data(img),
      m_states(SCROLLVIEW_BITSET_SIZE),m_lastName("")
 {
     _zoomer = 0;
     m_states[AUTO_SCALE]=always_scale;
     m_states[AUTO_ROTATE]=rfit;
     m_states[FIRST_RESIZE_DONE]=false;
     m_states[IMAGE_IS_JPEG]=false;
     m_states[IMAGE_SCALED_LOADED]=false;
     m_states[SHOW_ZOOMER]=true;
     _original_data.convertDepth(QPixmap::defaultDepth());
     _original_data.setAlphaBuffer(false);
+    _newImage = true;
     init();
 }
 
 OImageScrollView::OImageScrollView (const QString&img, QWidget * parent, const char * name, WFlags f,bool always_scale,bool rfit)
     :QScrollView(parent,name,f|Qt::WRepaintNoErase),_image_data(),_original_data(),m_states(SCROLLVIEW_BITSET_SIZE),m_lastName("")
 {
     _zoomer = 0;
     m_states.resize(SCROLLVIEW_BITSET_SIZE);
     m_states[AUTO_SCALE]=always_scale;
     m_states[AUTO_ROTATE]=rfit;
     m_states[FIRST_RESIZE_DONE]=false;
     m_states[IMAGE_IS_JPEG]=false;
     m_states[IMAGE_SCALED_LOADED]=false;
     m_states[SHOW_ZOOMER]=true;
+    _newImage = true;
     init();
     setImage(img);
 }
 
 void OImageScrollView::setImage(const QImage&img)
 {
     _image_data = QImage();
     _original_data=img;
     _original_data.convertDepth(QPixmap::defaultDepth());
     _original_data.setAlphaBuffer(false);
     m_lastName = "";
     setImageIsJpeg(false);
     setImageScaledLoaded(false);
+    _newImage = true;
     if (FirstResizeDone()) {
         generateImage();
     }
 }
 
 void OImageScrollView::loadJpeg(bool interncall)
 {
     if (m_lastName.isEmpty()) return;
     QImageIO iio( m_lastName, 0l );
     QString param;
     bool real_load = false;
+    _newImage = true;
     if (AutoScale()) {
         if (!interncall) {
             ExifData xf;
             bool scanned = xf.scan(m_lastName);
             int wid, hei;
             wid = QApplication::desktop()->width();
             hei = QApplication::desktop()->height();
             if (hei>wid) {
                 wid = hei;
             } else {
                 hei = wid;
             }
             if ( (scanned && (wid<xf.getWidth()||hei<xf.getHeight()))||!scanned ) {
                 param = QString( "Fast Shrink( 3 ) Scale( %1, %2, ScaleMin)" ).arg( wid ).arg( hei );
                 odebug << "Load jpeg scaled \"" << param << "\"" << oendl;
                 iio.setParameters(param.latin1());
                 setImageScaledLoaded(true);
             }
 
             real_load = true;
         }
     } else {
         if (ImageScaledLoaded()||!interncall) {
             odebug << "Load jpeg unscaled" << oendl;
             real_load = true;
         }
         setImageScaledLoaded(false);
     }
     if (real_load) {
         _original_data = iio.read() ? iio.image() : QImage();
     }
 }
 
 void OImageScrollView::setImage( const QString& path ) {
     odebug << "load new image " << oendl;
     if (m_lastName == path) return;
     m_lastName = path;
+    _newImage = true;
     _original_data = QImage();
     QString itype = QImage::imageFormat(m_lastName);
     odebug << "Image type = " << itype << oendl;
     if (itype == "JPEG") {
         setImageIsJpeg(true);
         loadJpeg();
     } else {
         setImageIsJpeg(false);
         _original_data.load(path);
         _original_data.convertDepth(QPixmap::defaultDepth());
         _original_data.setAlphaBuffer(false);
     }
     _image_data = QImage();
     if (FirstResizeDone()) {
         generateImage();
         if (isVisible()) viewport()->repaint(true);
     }
 }
 
 /* should be called every time the QImage changed it content */
 void OImageScrollView::init()
 {
     odebug << "init " << oendl;
 
     /*
      * create the zoomer
      * and connect ther various signals
      */
     _zoomer = new Opie::MM::OImageZoomer( this, "The Zoomer" );
     connect(_zoomer, SIGNAL( zoomAreaRel(int,int)),
             this, SLOT(scrollBy(int,int)) );
     connect(_zoomer, SIGNAL( zoomArea(int,int)),
             this, SLOT(center(int,int)) );
     connect(this,SIGNAL(contentsMoving(int,int)),
             _zoomer, (SLOT(setVisiblePoint(int,int))) );
     connect(this,SIGNAL(imageSizeChanged(const QSize&)),
             _zoomer, SLOT(setImageSize(const QSize&)) );
     connect(this,SIGNAL(viewportSizeChanged(const QSize&)),
             _zoomer, SLOT(setViewPortSize(const QSize&)) );
 
     setBackgroundColor(white);
     setFocusPolicy(QWidget::StrongFocus);
     setImageScaledLoaded(false);
     setImageIsJpeg(false);
     if (FirstResizeDone()) {
         m_last_rot = Rotate0;
         generateImage();
     } else if (_original_data.size().isValid()) {
         if (image_fit_into(_original_data.size()) || !ShowZoomer()) _zoomer->hide();
         resizeContents(_original_data.width(),_original_data.height());
     }
+    _intensity = 0;
 }
 
 void OImageScrollView::setAutoRotate(bool how)
 {
     /* to avoid double repaints */
     if (AutoRotate() != how) {
         m_states.setBit(AUTO_ROTATE,how);
         _image_data = QImage();
         generateImage();
     }
 }
 
 bool OImageScrollView::AutoRotate()const
 {
     return m_states.testBit(AUTO_ROTATE);
 }
 
 void OImageScrollView::setAutoScaleRotate(bool scale, bool rotate)
 {
     m_states.setBit(AUTO_ROTATE,rotate);
     setAutoScale(scale);
 }
 
 void OImageScrollView::setAutoScale(bool how)
 {
     m_states.setBit(AUTO_SCALE,how);
     _image_data = QImage();
     if (ImageIsJpeg() && how == false && ImageScaledLoaded()==true) {
         loadJpeg(true);
     }
     generateImage();
 }
 
 bool OImageScrollView::AutoScale()const
 {
     return m_states.testBit(AUTO_SCALE);
 }
 
 OImageScrollView::~OImageScrollView()
 {
 }
 
 void OImageScrollView::rescaleImage(int w, int h)
 {
     if (_image_data.width()==w && _image_data.height()==h) {
         return;
     }
     double hs = (double)h / (double)_image_data.height() ;
     double ws = (double)w / (double)_image_data.width() ;
     double scaleFactor = (hs > ws) ? ws : hs;
     int smoothW = (int)(scaleFactor * _image_data.width());
     int smoothH = (int)(scaleFactor * _image_data.height());
     _image_data = _image_data.smoothScale(smoothW,smoothH);
 }
 
 void OImageScrollView::rotate_into_data(Rotation r)
 {
     /* realy - we must do this that way, 'cause when acting direct on _image_data the app will
        segfault :( */
     QImage dest;
     int x, y;
     if ( _original_data.depth() > 8 )
     {
         unsigned int *srcData, *destData;
         switch ( r )
         {
             case Rotate90:
                 dest.create(_original_data.height(), _original_data.width(), _original_data.depth());
                 for ( y=0; y < _original_data.height(); ++y )
                 {
                     srcData = (unsigned int *)_original_data.scanLine(y);
                     for ( x=0; x < _original_data.width(); ++x )
                     {
                         destData = (unsigned int *)dest.scanLine(x);
                         destData[_original_data.height()-y-1] = srcData[x];
                     }
                 }
                 break;
             case Rotate180:
                 dest.create(_original_data.width(), _original_data.height(), _original_data.depth());
                 for ( y=0; y < _original_data.height(); ++y )
                 {
                     srcData = (unsigned int *)_original_data.scanLine(y);
                     destData = (unsigned int *)dest.scanLine(_original_data.height()-y-1);
                     for ( x=0; x < _original_data.width(); ++x )
                         destData[_original_data.width()-x-1] = srcData[x];
                 }
                 break;
             case Rotate270:
                 dest.create(_original_data.height(), _original_data.width(), _original_data.depth());
                 for ( y=0; y < _original_data.height(); ++y )
                 {
                     srcData = (unsigned int *)_original_data.scanLine(y);
                     for ( x=0; x < _original_data.width(); ++x )
                     {
                         destData = (unsigned int *)dest.scanLine(_original_data.width()-x-1);
                         destData[y] = srcData[x];
                     }
                 }
                 break;
             default:
                 dest = _original_data;
                 break;
         }
     }
     else
     {
         unsigned char *srcData, *destData;
         unsigned int *srcTable, *destTable;
         switch ( r )
         {
             case Rotate90:
                 dest.create(_original_data.height(), _original_data.width(), _original_data.depth());
                 dest.setNumColors(_original_data.numColors());
                 srcTable = (unsigned int *)_original_data.colorTable();
                 destTable = (unsigned int *)dest.colorTable();
                 for ( x=0; x < _original_data.numColors(); ++x )
                     destTable[x] = srcTable[x];
                 for ( y=0; y < _original_data.height(); ++y )
                 {
                     srcData = (unsigned char *)_original_data.scanLine(y);
                     for ( x=0; x < _original_data.width(); ++x )
                     {
                         destData = (unsigned char *)dest.scanLine(x);
                         destData[_original_data.height()-y-1] = srcData[x];
                     }
                 }
                 break;
             case Rotate180:
                 dest.create(_original_data.width(), _original_data.height(), _original_data.depth());
                 dest.setNumColors(_original_data.numColors());
                 srcTable = (unsigned int *)_original_data.colorTable();
                 destTable = (unsigned int *)dest.colorTable();
                 for ( x=0; x < _original_data.numColors(); ++x )
                     destTable[x] = srcTable[x];
                 for ( y=0; y < _original_data.height(); ++y )
                 {
                     srcData = (unsigned char *)_original_data.scanLine(y);
                     destData = (unsigned char *)dest.scanLine(_original_data.height()-y-1);
                     for ( x=0; x < _original_data.width(); ++x )
                         destData[_original_data.width()-x-1] = srcData[x];
                 }
                 break;
             case Rotate270:
                 dest.create(_original_data.height(), _original_data.width(), _original_data.depth());
                 dest.setNumColors(_original_data.numColors());
                 srcTable = (unsigned int *)_original_data.colorTable();
                 destTable = (unsigned int *)dest.colorTable();
                 for ( x=0; x < _original_data.numColors(); ++x )
                     destTable[x] = srcTable[x];
                 for ( y=0; y < _original_data.height(); ++y )
                 {
                     srcData = (unsigned char *)_original_data.scanLine(y);
                     for ( x=0; x < _original_data.width(); ++x )
                     {
                         destData = (unsigned char *)dest.scanLine(_original_data.width()-x-1);
                         destData[y] = srcData[x];
                     }
                 }
                 break;
             default:
                 dest = _original_data;
                 break;
         }
 
     }
+    _newImage = true;
     _image_data = dest;
 }
 
+void OImageScrollView::apply_gamma(int aValue)
+{
+    if (!_image_data.size().isValid()) return;
+    float percent = ((float)aValue/100);
+    odebug << "Apply gamma " << percent << oendl;
+    int pixels = _image_data.depth()>8?_image_data.width()*_image_data.height() : _image_data.numColors();
+    int segColors = _image_data.depth() > 8 ? 256 : _image_data.numColors();
+    unsigned char *segTbl = new unsigned char[segColors];
+    bool brighten = (percent >= 0);
+    if ( percent < 0 )
+        percent = -percent;
+
+    unsigned int *data = _image_data.depth() > 8 ? (unsigned int *)_image_data.bits() :
+                         (unsigned int *)_image_data.colorTable();
+
+
+    if (brighten) {
+        for ( int i=0; i < segColors; ++i )
+        {
+            int tmp = (int)(i*percent);
+            if ( tmp > 255 )
+                tmp = 255;
+            segTbl[i] = tmp;
+        }
+    } else {
+        for ( int i=0; i < segColors; ++i )
+        {
+            int tmp = (int)(i*percent);
+            if ( tmp < 0 )
+                tmp = 0;
+            segTbl[i] = tmp;
+        }
+    }
+    if (brighten) {
+        for ( int i=0; i < pixels; ++i )
+        {
+            int r = qRed(data[i]);
+            int g = qGreen(data[i]);
+            int b = qBlue(data[i]);
+            int a = qAlpha(data[i]);
+            r = r + segTbl[r] > 255 ? 255 : r + segTbl[r];
+            g = g + segTbl[g] > 255 ? 255 : g + segTbl[g];
+            b = b + segTbl[b] > 255 ? 255 : b + segTbl[b];
+            data[i] = qRgba(r, g, b,a);
+        }
+    } else {
+        for ( int i=0; i < pixels; ++i )
+        {
+            int r = qRed(data[i]);
+            int g = qGreen(data[i]);
+            int b = qBlue(data[i]);
+            int a = qAlpha(data[i]);
+            r = r - segTbl[r] < 0 ? 0 : r - segTbl[r];
+            g = g - segTbl[g] < 0 ? 0 : g - segTbl[g];
+            b = b - segTbl[b] < 0 ? 0 : b - segTbl[b];
+            data[i] = qRgba(r, g, b, a);
+        }
+    }
+    delete [] segTbl;
+}
+
+const int OImageScrollView::Intensity()const
+{
+    return _intensity;
+}
+
+int OImageScrollView::setIntensity(int value,bool reload)
+{
+    int oldi = _intensity;
+    _intensity = value;
+    if (!_pdata.size().isValid()) {
+        return _intensity;
+    }
+
+    if (!reload) {
+        _image_data = _pdata.convertToImage();
+        apply_gamma(_intensity-oldi);
+        _pdata.convertFromImage(_image_data);
+        /*
+        * invalidate
+        */
+        _image_data=QImage();
+        if (isVisible()) {
+            updateContents(contentsX(),contentsY(),width(),height());
+        }
+    } else {
+        _newImage = true;
+        generateImage();
+    }
+    return _intensity;
+}
+
 void OImageScrollView::generateImage()
 {
     Rotation r = Rotate0;
     _pdata = QPixmap();
     if (_original_data.isNull()) {
         emit imageSizeChanged( _image_data.size() );
         if (_zoomer) _zoomer->setImage( _image_data );
         return;
     }
     if (width()>height()&&_original_data.width()<_original_data.height() ||
         width()<height()&&_original_data.width()>_original_data.height()) {
         if (AutoRotate()) r = Rotate90;
     }
 
     int twidth,theight;
     odebug << " r = " << r << oendl;
     if (AutoScale() && (_original_data.width()>width() || _original_data.height() > height()) ) {
         if (!_image_data.size().isValid()||width()>_image_data.width()||height()>_image_data.height()) {
             odebug << "Rescaling data" << oendl;
             if (r==Rotate0) {
                 _image_data = _original_data;
             } else {
                 rotate_into_data(r);
             }
+            _newImage = true;
         }
         rescaleImage(width(),height());
     }  else if (!FirstResizeDone()||r!=m_last_rot||_image_data.width()==0) {
         if (r==Rotate0) {
             _image_data = _original_data;
         } else {
             rotate_into_data(r);
         }
         m_last_rot = r;
     }
+
+    if (_newImage) {
+        apply_gamma(_intensity);
+        _newImage = false;
+    }
+
     _pdata.convertFromImage(_image_data);
     twidth = _image_data.width();
     theight = _image_data.height();
 
     /*
      * update the zoomer
      */
     check_zoomer();
     emit imageSizeChanged( _image_data.size() );
     rescaleImage( 128, 128 );
     resizeContents(twidth,theight);
     /*
      * move scrollbar
      */
      if (_zoomer) {
         _zoomer->setGeometry( viewport()->width()-_image_data.width()/2, viewport()->height()-_image_data.height()/2,
              _image_data.width()/2, _image_data.height()/2 );
         _zoomer->setImage( _image_data );
      }
     /*
      * invalidate
      */
     _image_data=QImage();
     if (isVisible()) {
         updateContents(contentsX(),contentsY(),width(),height());
     }
 }
 
 void OImageScrollView::resizeEvent(QResizeEvent * e)
 {
     odebug << "OImageScrollView resizeEvent (" << e->size() << " - " << e->oldSize() << oendl;
     QScrollView::resizeEvent(e);
     if (e->oldSize()==e->size()||!isUpdatesEnabled ()) return;
     generateImage();
     setFirstResizeDone(true);
     emit viewportSizeChanged( viewport()->size() );
 
 }
 
 void OImageScrollView::keyPressEvent(QKeyEvent * e)
 {
     if (!e) return;
     int dx = horizontalScrollBar()->lineStep();
     int dy = verticalScrollBar()->lineStep();
     if (e->key()==Qt::Key_Right) {
         scrollBy(dx,0);
         e->accept();
     } else if (e->key()==Qt::Key_Left) {
         scrollBy(0-dx,0);
         e->accept();
     } else if (e->key()==Qt::Key_Up) {
         scrollBy(0,0-dy);
         e->accept();
     } else if (e->key()==Qt::Key_Down) {
         scrollBy(0,dy);
         e->accept();
     } else {
         e->ignore();
     }
     QScrollView::keyPressEvent(e);
 }
 
 void OImageScrollView::drawContents(QPainter * p, int clipx, int clipy, int clipw, int cliph)
 {
     if (!_pdata.size().isValid()) {
         p->fillRect(clipx,clipy,clipw,cliph, backgroundColor());
         return;
     }
 
     int w = clipw;
     int h = cliph;
     int x = clipx;
     int y = clipy;
     bool erase = false;
 
     if (w>_pdata.width()) {
         w = _pdata.width()-x;
         erase=true;
     }
     if (h>_pdata.height()) {
         h = _pdata.height()-y;
         erase=true;
     }
     if (!erase && (clipy+cliph>_pdata.height()||clipx+clipw>_pdata.width())) {
         erase = true;
     }
     if (erase||_original_data.hasAlphaBuffer()) {
         p->fillRect(clipx,clipy,clipw,cliph, backgroundColor());
     }
     if (w>0 && h>0&&x<_pdata.width()&&y<_pdata.height()) {
         p->drawPixmap(clipx,clipy,_pdata,x,y,w,h);
     }
 }
 
 /* using the real geometry points and not the translated points is wanted! */
 void OImageScrollView::viewportMouseMoveEvent(QMouseEvent* e)
 {
     int mx, my;
     mx = e->x();
     my = e->y();
     if (_mouseStartPosX!=-1 && _mouseStartPosY!=-1) {
         int diffx = _mouseStartPosX-mx;
         int diffy = _mouseStartPosY-my;
         scrollBy(diffx,diffy);
     }
     _mouseStartPosX=mx;
     _mouseStartPosY=my;
 }
 
 void OImageScrollView::contentsMousePressEvent ( QMouseEvent * e)
 {
     odebug << " X and Y " << e->x() << " " << e->y() << oendl;
     /* this marks the beginning of a possible mouse move. Due internal reasons of QT
        the geometry values here may real differ from that set in MoveEvent (I don't know
        why). For getting them in real context, we use the first move-event to set the start
        position ;)
     */
     _mouseStartPosX = -1;
     _mouseStartPosY = -1;
 }
 
 void OImageScrollView::setDestructiveClose() {
     WFlags fl = getWFlags();
     /* clear it just in case */
     fl &= ~WDestructiveClose;
     fl |= WDestructiveClose;
     setWFlags( fl );
 }
 
 bool OImageScrollView::image_fit_into(const QSize&s )
 {
     if (s.width()>width()||s.height()>height()) {
         return false;
     }
     return true;
 }
 
 void OImageScrollView::setShowZoomer(bool how)
 {
     m_states.setBit(SHOW_ZOOMER,how);
     check_zoomer();
 }
 
 bool OImageScrollView::ShowZoomer()const
 {
     return m_states.testBit(SHOW_ZOOMER);
 }
 
 void OImageScrollView::check_zoomer()
 {
     if (!_zoomer) return;
     if ( (!ShowZoomer()||image_fit_into(_pdata.size()) ) && _zoomer->isVisible()) {
         _zoomer->hide();
     } else if ( ShowZoomer() && !image_fit_into(_pdata.size()) && _zoomer->isHidden()){
         _zoomer->show();
     }
 }
 
 bool OImageScrollView::FirstResizeDone()const
 {
     return m_states.testBit(FIRST_RESIZE_DONE);
 }
 
 void OImageScrollView::setFirstResizeDone(bool how)
 {
     m_states.setBit(FIRST_RESIZE_DONE,how);
 }
 
 bool OImageScrollView::ImageIsJpeg()const
 {
     return m_states.testBit(IMAGE_IS_JPEG);
 }
 
 void OImageScrollView::setImageIsJpeg(bool how)
 {
     m_states.setBit(IMAGE_IS_JPEG,how);
 }
 
 bool OImageScrollView::ImageScaledLoaded()const
 {
     return m_states.testBit(IMAGE_SCALED_LOADED);
 }
 
 void OImageScrollView::setImageScaledLoaded(bool how)
 {
     m_states.setBit(IMAGE_SCALED_LOADED,how);
 }
 
 } // namespace MM
 } // namespace Opie
diff --git a/libopie2/opiemm/oimagescrollview.h b/libopie2/opiemm/oimagescrollview.h
index 01a2d56..11964fd 100644
--- a/libopie2/opiemm/oimagescrollview.h
+++ b/libopie2/opiemm/oimagescrollview.h
@@ -1,193 +1,209 @@
 #ifndef _IMAGE_SCROLL_VIEW_H
 #define _IMAGE_SCROLL_VIEW_H
 
 #include <qscrollview.h>
 #include <qimage.h>
 #include <qpixmap.h>
 #include <qstring.h>
 #include <qdialog.h>
 #include <qbitarray.h>
 
 
 class QPainter;
 
 namespace Opie { namespace MM {
 
     class OImageZoomer;
 /**
  * \brief Class displaying an image with scrollbars
  *
  * This class displays various image formats supported by QT an
  * gives a small interface for basics display modifications.
  *
  * @see QScrollView
  *
  * @since 1.2
  */
 class OImageScrollView:public QScrollView
 {
     Q_OBJECT
 public:
     enum  Rotation {
         Rotate0,
         Rotate90,
         Rotate180,
         Rotate270
     };
 
     /**
      * Standard constructor
      * @param parent the parent widget
      * @param name the name of the widget
      * @param fl widget flags. The flag Qt::WRepaintNoErase will be always set.
      */
     OImageScrollView( QWidget* parent, const char* name = 0, WFlags fl = 0 );
     /**
      * constructor
      * @param aImage QImage object to display
      * @param parent the parent widget
      * @param name the name of the widget
      * @param fl widget flags. The flag Qt::WRepaintNoErase will be always set.
      * @param always_scale if the image should be scaled into the display
      * @param rfit the image will be rotated to fit
      */
     OImageScrollView (const QImage&aImage, QWidget * parent=0, const char * name=0, WFlags f=0,bool always_scale=false,bool rfit=false );
     /**
      * constructor
      * @param aFile image file to display
      * @param parent the parent widget
      * @param name the name of the widget
      * @param fl widget flags. The flag Qt::WRepaintNoErase will be always set.
      * @param always_scale if the image should be scaled into the display
      * @param rfit the image will be rotated to fit
      */
     OImageScrollView (const QString&aFile, QWidget * parent=0, const char * name=0, WFlags f=0,bool always_scale=false,bool rfit=false );
     virtual ~OImageScrollView();
 
     /**
      * sets the WDestructiveClose flag to the view
      */
     virtual void setDestructiveClose();
 
     /**
      * set if the image should be rotate to best fit
      * and repaint it if set to a new value.
      *
      * Be carefull - autorating real large images cost time!
      * @param how if true then autorotate otherwise not
      */
     virtual void setAutoRotate(bool how);
     /**
      * set if the image should be scaled to the size of the viewport if larger(!)
      *
      * if autoscaling is set when loading a jpeg image, it will use a feature of
      * jpeg lib to load the image scaled to display size. If switch of later the
      * image will reloaded.
      *
      * @param how true - display image scaled down otherwise not
      */
     virtual void setAutoScale(bool how);
     /**
      * set if the image should be scaled to the size of the viewport if larger(!)
      * and/or rotate to best fit. You avoid double repainting when you want to switch
      * booth values.
      *
      * if autoscaling is set when loading a jpeg image, it will use a feature of
      * jpeg lib to load the image scaled to display size. If switch of later the
      * image will reloaded.
      *
      * @param scale true - display image scaled down otherwise not
      * @param rotate true - the image will rotate for best fit
      */
     virtual void setAutoScaleRotate(bool scale, bool rotate);
     /**
      * set if there should be displayed a small zoomer widget at the right bottom of
      * the view when the image is larger than the viewport.
      *
      * @param how true - display zoomer
      */
     virtual void setShowZoomer(bool how);
 
     /**
      * return the current value of the autorotate flag.
      */
     virtual bool AutoRotate()const;
     /**
      * return the current value of the autoscale flag.
      */
     virtual bool AutoScale()const;
     /**
      * return the current value of the show zoomer flag.
      */
     virtual bool ShowZoomer()const;
 
+    /**
+     * set a display intensity
+     * @param value the intensity value, will calcuated to a percent value (value/100)
+     * @param reload should the real image recalculated complete or just work on current display.
+     * @return the new intensity
+     */
+    virtual int setIntensity(int value,bool reload=false);
+    /**
+     * return the current display intensity
+     */
+    virtual const int Intensity()const;
+
+
 public slots:
     /**
      * Displays a new image, calculations will made immediately.
      *
      * @param aImage the image to display
      */
     virtual void setImage(const QImage&aImage);
     /**
      * Displays a new image, calculations will made immediately.
      *
      * @param path the image to display
      */
     virtual void setImage( const QString& path );
 
 
 signals:
     /**
      * emitted when the display image size has changed.
      */
     void imageSizeChanged( const QSize& );
     /**
      * emitted when the size of the viewport has changed, eg. in resizeEvent of
      * the view.
      *
      * @see QWidget::resizeEvent
      */
     void viewportSizeChanged( const QSize& );
 
 protected:
     virtual void drawContents ( QPainter * p, int clipx, int clipy, int clipw, int cliph );
     void init();
 
     Opie::MM::OImageZoomer *_zoomer;
     QImage _image_data;
     QImage _original_data;
     QPixmap _pdata;
+    int _intensity;
+    bool _newImage;
 
     int _mouseStartPosX,_mouseStartPosY;
 
     QBitArray m_states;
 
     Rotation m_last_rot;
     QString m_lastName;
     virtual void rescaleImage(int w, int h);
 
     virtual void rotate_into_data(Rotation r);
     virtual void generateImage();
     virtual void loadJpeg(bool interncall = false);
     bool image_fit_into(const QSize&s);
     void check_zoomer();
 
     /* internal bitset manipulation */
     virtual bool ImageIsJpeg()const;
     virtual void setImageIsJpeg(bool how);
     virtual bool ImageScaledLoaded()const;
     virtual void setImageScaledLoaded(bool how);
     virtual bool FirstResizeDone()const;
     virtual void setFirstResizeDone(bool how);
+    virtual void apply_gamma(int aValue);
 
 protected slots:
     virtual void viewportMouseMoveEvent(QMouseEvent* e);
     virtual void contentsMousePressEvent ( QMouseEvent * e);
     virtual void resizeEvent(QResizeEvent * e);
     virtual void keyPressEvent(QKeyEvent * e);
 };
 
 }
 }
 
 #endif