integrated first implementation of rotation/scaling

2 files changed, 199 insertions, 9 deletions

diff --git a/noncore/graphics/opie-eye/gui/imagescrollview.cpp b/noncore/graphics/opie-eye/gui/imagescrollview.cpp
index 019f376..0d35354 100644
--- a/noncore/graphics/opie-eye/gui/imagescrollview.cpp
+++ b/noncore/graphics/opie-eye/gui/imagescrollview.cpp
@@ -1,105 +1,276 @@
 #include "imagescrollview.h"
 
 #include <opie2/odebug.h>
 
 using namespace Opie::Core;
 
 #include <qimage.h>
 #include <qlayout.h>
 
-ImageScrollView::ImageScrollView (const QImage&img, QWidget * parent, const char * name, WFlags f)
-    :QScrollView(parent,name,f|Qt::WRepaintNoErase),_image_data(img)
+ImageScrollView::ImageScrollView (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),scale_to_fit(always_scale),
+    rotate_to_fit(rfit),first_resize_done(false)
 {
     init();
 }
 
-ImageScrollView::ImageScrollView (const QString&img, QWidget * parent, const char * name, WFlags f)
-    :QScrollView(parent,name,f|Qt::WRepaintNoErase),_image_data(img)
+ImageScrollView::ImageScrollView (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(img),scale_to_fit(always_scale),
+    rotate_to_fit(rfit),first_resize_done(false)
 {
     init();
 }
 
 void ImageScrollView::setImage(const QImage&img)
 {
-    _image_data = img;
+    _image_data = QImage();
+    _original_data=img;
+    first_resize_done = false;
     init();
 }
 
 /* should be called every time the QImage changed it content */
 void ImageScrollView::init()
 {
     viewport()->setBackgroundColor(white);
-    resizeContents(_image_data.width(),_image_data.height());
+    if (_original_data.size().isValid()) {
+        resizeContents(_original_data.width(),_original_data.height());
+    }
+    last_rot = Rotate0;
 }
 
 ImageScrollView::~ImageScrollView()
 {
 }
 
+void ImageScrollView::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 ImageScrollView::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;
+        }
+
+    }
+    _image_data = dest;
+}
+
+void ImageScrollView::resizeEvent(QResizeEvent * e)
+{
+    odebug << "ImageScrollView resizeEvent" << oendl;
+    QScrollView::resizeEvent(e);
+    Rotation r = Rotate0;
+    if (width()>height()&&_original_data.width()<_original_data.height() ||
+        width()<height()&&_original_data.width()>_original_data.height()) {
+        if (rotate_to_fit) r = Rotate90;
+    }
+    odebug << " r = " << r << oendl;
+    if (scale_to_fit) {
+        if (!_image_data.size().isValid()||width()>_image_data.width()||height()>_image_data.height()) {
+            if (r==Rotate0) {
+                _image_data = _original_data;
+            } else {
+                rotate_into_data(r);
+            }
+        }
+        rescaleImage(width(),height());
+        resizeContents(width()-10,height()-10);
+    }  else if (!first_resize_done||r!=last_rot) {
+        if (r==Rotate0) {
+            _image_data = _original_data;
+        } else {
+            rotate_into_data(r);
+        }
+        last_rot = r;
+        resizeContents(_image_data.width(),_image_data.height());
+    }
+    first_resize_done = true;
+}
+
 void ImageScrollView::drawContents(QPainter * p, int clipx, int clipy, int clipw, int cliph)
 {
     int w = clipw;
     int h = cliph;
     int x = clipx;
     int y = clipy;
     bool erase = false;
 
+    if (!_image_data.size().isValid()) {
+        p->fillRect(clipx,clipy,clipw,cliph,white);
+        return;
+    }
     if (w>_image_data.width()) {
         w=_image_data.width();
         x = 0;
         erase = true;
     } else if (x+w>_image_data.width()){
         x = _image_data.width()-w;
     }
     if (h>_image_data.height()) {
         h=_image_data.height();
         y = 0;
         erase = true;
     } else if (y+h>_image_data.height()){
         y = _image_data.height()-h;
     }
-    if (erase) {
+    if (erase||_image_data.hasAlphaBuffer()) {
         p->fillRect(clipx,clipy,clipw,cliph,white);
     }
     p->drawImage(clipx,clipy,_image_data,x,y,w,h);
 }
 
 /* using the real geometry points and not the translated points is wanted! */
 void ImageScrollView::viewportMouseMoveEvent(QMouseEvent* e)
 {
     int mx, my;
     mx = e->x();
     my = e->y();
     int diffx = _mouseStartPosX-mx;
     int diffy = _mouseStartPosY-my;
     scrollBy(diffx,diffy);
     _mouseStartPosX=mx;
     _mouseStartPosY=my;
 }
 
 void ImageScrollView::contentsMouseReleaseEvent ( QMouseEvent * e)
 {
     _mouseStartPosX = e->x();
     _mouseStartPosY = e->y();
 }
 
 void ImageScrollView::contentsMousePressEvent ( QMouseEvent * e)
 {
     _mouseStartPosX = e->x();
     _mouseStartPosY = e->y();
 }
 
 /* for testing */
 ImageDlg::ImageDlg(const QString&fname,QWidget * parent, const char * name)
     :QDialog(parent,name,true,WStyle_ContextHelp)
 {
     QVBoxLayout*dlglayout = new QVBoxLayout(this);
     dlglayout->setSpacing(2);
     dlglayout->setMargin(1);
     ImageScrollView*inf = new ImageScrollView(fname,this);
     dlglayout->addWidget(inf);
+    odebug << "Imagedlg constructor end" << oendl;
 }
 
 ImageDlg::~ImageDlg()
 {
 }
diff --git a/noncore/graphics/opie-eye/gui/imagescrollview.h b/noncore/graphics/opie-eye/gui/imagescrollview.h
index edea235..e25f955 100644
--- a/noncore/graphics/opie-eye/gui/imagescrollview.h
+++ b/noncore/graphics/opie-eye/gui/imagescrollview.h
@@ -1,43 +1,62 @@
 #ifndef _IMAGE_SCROLL_VIEW_H
 #define _IMAGE_SCROLL_VIEW_H
 
 #include <qscrollview.h>
 #include <qimage.h>
 #include <qstring.h>
 #include <qdialog.h>
 
 class QPainter;
 
 class ImageScrollView:public QScrollView
 {
     Q_OBJECT
 public:
-    ImageScrollView (const QImage&, QWidget * parent=0, const char * name=0, WFlags f=0 );
-    ImageScrollView (const QString&, QWidget * parent=0, const char * name=0, WFlags f=0 );
+    ImageScrollView (const QImage&, QWidget * parent=0, const char * name=0, WFlags f=0,bool always_scale=false,bool rfit=false );
+    ImageScrollView (const QString&, QWidget * parent=0, const char * name=0, WFlags f=0,bool always_scale=false,bool rfit=false );
     virtual ~ImageScrollView();
 
     void setImage(const QImage&);
+
+    enum  Rotation {
+        Rotate0,
+        Rotate90,
+        Rotate180,
+        Rotate270
+    };
+
 protected:
     virtual void drawContents ( QPainter * p, int clipx, int clipy, int clipw, int cliph );
     void init();
 
     QImage _image_data;
+    QImage _original_data;
 
     int _mouseStartPosX,_mouseStartPosY;
 
+    bool scale_to_fit;
+    bool rotate_to_fit;
+    bool first_resize_done;
+    Rotation last_rot;
+
+    void rescaleImage(int w, int h);
+
+    void rotate_into_data(Rotation r);
+
 protected slots:
     virtual void viewportMouseMoveEvent(QMouseEvent* e);
     virtual void contentsMousePressEvent ( QMouseEvent * e);
     virtual void contentsMouseReleaseEvent ( QMouseEvent * e);
+    virtual void resizeEvent(QResizeEvent * e);
 };
 
 /* for testing */
 class ImageDlg:public QDialog
 {
     Q_OBJECT
 public:
     ImageDlg(const QString&,QWidget * parent=0, const char * name=0);
     virtual ~ImageDlg();
 };
 
 #endif