Hi Ajaz, just a question are you sure that your primary suface is double/triple buffered?
if not you should add the flags "*DSCAPS_DOUBLE" or "DSCAPS_FLIPPING"* ** if the primary surface is double buffered then may be the problem is in your gfxdriver, could you try to run without hw-acceeration use the "no-hardware" option? hth Haithem. On Thu, Nov 19, 2009 at 8:18 AM, Ajaz H <aj...@tataelxsi.co.in> wrote: > Hi, > I am trying to implement Duff rules using DirectFB and encountered a hang > on doing the following procedure. > > static IDirectFBSurface *primary = NULL; > DFBSurfaceDescription dsc; > IDirectFBImageProvider *provider; > static IDirectFBSurface *logo = NULL; > > DFBCHECK (dfb->SetCooperativeLevel (dfb, DFSCL_FULLSCREEN)); > dsc.flags = DSDESC_CAPS; > dsc.caps = DSCAPS_PRIMARY; > DFBCHECK (dfb->CreateSurface( dfb, &dsc, &primary )); > > primary->SetDrawingFlags(primary, DSDRAW_BLEND); > primary->SetPorterDuff(primary,DSPD_CLEAR); > primary->SetColor(primary, 0x80, 0x0, 0x0, 0x80); > primary->SetBlittingFlags(primary,DSBLIT_BLEND_ALPHACHANNEL); > > DFBCHECK (dfb->CreateImageProvider (dfb, "/root/images.jpeg", &provider)); > DFBCHECK (dfb->CreateSurface( dfb, &dsc, &logo)); > DFBCHECK (provider->RenderTo (provider, logo, NULL)); > > provider->Release (provider); > DFBCHECK (primary->FillRectangle (primary, 0, 0, screen_width, > screen_height)); > primary->SetPorterDuff(primary,DSPD_CLEAR); > //logo->SetPorterDuff(logo, DSPD_SRC); //just trying out a > few combinations > DFBCHECK (primary->Blit (primary, logo, NULL, 50,( (screen_height - > dsc.height)/2))); > DFBCHECK (primary->Flip (primary, NULL, DSFLIP_BLIT)); > > This is the part of the code due to which the hang is occurring.It doesnt > hang if the setblittingflags line is removed. > Please help me out.It may only be because im trying out something that > shouldnt be done. > > Thanks in advance!!!! > > Regards, > Ajaz H > > > _______________________________________________ > directfb-dev mailing list > directfb-dev@directfb.org > http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev > >
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