re-enable alphablend
[enigma2.git] / lib / gui / epixmap.cpp
index ca3e456..84fec32 100644 (file)
@@ -2,29 +2,55 @@
 #include <lib/gdi/epng.h>
 #include <lib/gui/ewidgetdesktop.h>
 
-ePixmap::ePixmap(eWidget *parent): eWidget(parent)
+ePixmap::ePixmap(eWidget *parent)
+       :eWidget(parent), m_alphatest(false)
 {
 }
 
+void ePixmap::setAlphatest(int alphatest)
+{
+       m_alphatest = alphatest;
+       setTransparent(alphatest);
+}
+
 void ePixmap::setPixmap(gPixmap *pixmap)
 {
        m_pixmap = pixmap;
        event(evtChangedPixmap);
 }
 
+void ePixmap::setPixmap(ePtr<gPixmap> &pixmap)
+{
+       m_pixmap = pixmap;
+       event(evtChangedPixmap);
+}
+
 void ePixmap::setPixmapFromFile(const char *filename)
 {
-       // use direct filename for absolute path or relative to enigma2 DATADIR otherwise
-       if (filename[0] == '/')
-               loadPNG(m_pixmap, filename);
-       else
-               loadPNG(m_pixmap, strcat(DATADIR "/enigma2/", filename));
-               
-               // TODO
-       getDesktop()->makeCompatiblePixmap(*m_pixmap);
+       loadPNG(m_pixmap, filename);
+       
+       if (!m_pixmap)
+       {
+               eDebug("ePixmap::setPixmapFromFile: loadPNG failed");
+               return;
+       }
+       
+               // TODO: This only works for desktop 0
+       getDesktop(0)->makeCompatiblePixmap(*m_pixmap);
        event(evtChangedPixmap);
 }
 
+void ePixmap::checkSize()
+{
+                       /* when we have no pixmap, or a pixmap of different size, we need 
+          to enable transparency in any case. */
+       if (m_pixmap && m_pixmap->size() == size() && !m_alphatest)
+               setTransparent(0);
+       else
+               setTransparent(1);
+               /* fall trough. */
+}
+
 int ePixmap::event(int event, void *data, void *data2)
 {
        switch (event)
@@ -34,18 +60,34 @@ int ePixmap::event(int event, void *data, void *data2)
                ePtr<eWindowStyle> style;
                
                getStyle(style);
-               
-//             eWidget::event(event, data, data2);
-               
+
+//     we don't clear the background before because of performance reasons.
+//     when the pixmap is too small to fit the whole widget area, the widget is
+//     transparent anyway, so the background is already painted.
+//             eWidget::event(event, data, data2); 
+
                gPainter &painter = *(gPainter*)data2;
                if (m_pixmap)
-                       painter.blit(m_pixmap, ePoint(0, 0));
-               
+               {
+                       int flags = 0;
+                       if (m_alphatest == 0)
+                               flags = 0;
+                       else if (m_alphatest == 1)
+                               flags = gPainter::BT_ALPHATEST;
+                       else if (m_alphatest == 2)
+                               flags = gPainter::BT_ALPHABLEND;
+                       painter.blit(m_pixmap, ePoint(0, 0), eRect(), flags);
+               }
+
                return 0;
        }
        case evtChangedPixmap:
+               checkSize();
                invalidate();
                return 0;
+       case evtChangedSize:
+               checkSize();
+                       /* fall trough. */
        default:
                return eWidget::event(event, data, data2);
        }