re-enable alphablend
[enigma2.git] / lib / gui / epixmap.cpp
index e69de29..84fec32 100644 (file)
@@ -0,0 +1,94 @@
+#include <lib/gui/epixmap.h>
+#include <lib/gdi/epng.h>
+#include <lib/gui/ewidgetdesktop.h>
+
+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)
+{
+       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)
+       {
+       case evtPaint:
+       {
+               ePtr<eWindowStyle> style;
+               
+               getStyle(style);
+
+//     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)
+               {
+                       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);
+       }
+}