remove old comment, fix returncodes on signal
[enigma2.git] / lib / gdi / gfbdc.cpp
index a1f4c98..ee2227c 100644 (file)
@@ -34,20 +34,24 @@ gFBDC::gFBDC()
        
        surface.data_phys = 50*1024*1024; // FIXME
        
-       surface_back.type = 0;
-       surface_back.x = 720;
-       surface_back.y = 576;
-       surface_back.bpp = 32;
-       surface_back.bypp = 4;
-       surface_back.stride = fb->Stride();
-       surface_back.offset = surface.y;
-
        int fb_size = surface.stride * surface.y;
 
-       surface_back.data = fb->lfb + fb_size;
-       surface_back.data_phys = surface.data_phys + fb_size;
+       if (fb->getNumPages() > 1)
+       {
+               m_enable_double_buffering = 1;
+               surface_back.type = 0;
+               surface_back.x = 720;
+               surface_back.y = 576;
+               surface_back.bpp = 32;
+               surface_back.bypp = 4;
+               surface_back.stride = fb->Stride();
+               surface_back.offset = surface.y;
+               surface_back.data = fb->lfb + fb_size;
+               surface_back.data_phys = surface.data_phys + fb_size;
        
-       fb_size *= 2;
+               fb_size *= 2;
+       } else
+               m_enable_double_buffering = 0;
        
        eDebug("%dkB available for acceleration surfaces.", (fb->Available() - fb_size)/1024);
        
@@ -139,11 +143,14 @@ void gFBDC::exec(gOpcode *o)
        }
        case gOpcode::flip:
        {
-               gSurface s(surface);
-               surface = surface_back;
-               surface_back = s;
+               if (m_enable_double_buffering)
+               {
+                       gSurface s(surface);
+                       surface = surface_back;
+                       surface_back = s;
                
-               fb->setOffset(surface_back.offset);
+                       fb->setOffset(surface_back.offset);
+               }
                break;
        }
        case gOpcode::waitVSync: