Hi, On Fri, 2012-05-04 at 03:48 -0700, Marc Lantelme wrote: > DFBCHECK(gWavePeerPrimary->SetBlittingFlags(gWavePeerPrimary, > DSBLIT_BLEND_ALPHACHANNEL)); > DFBCHECK(gWavePeerPrimary->SetDrawingFlags(gWavePeerPrimary, DSDRAW_BLEND));
DirectFB's default blend mode is not a porter duff mode, which has two implications: - blend results are unexpected and not what you want - this blend mode can only be accelerated in very specific cases with the driver you are using. You might want to surface->SetPorterDuff (surface, DSPD_SRC_OVER); > desc.flags = 0; > desc.flags |= DSDESC_WIDTH | DSDESC_HEIGHT; > desc.flags |= DSDESC_PIXELFORMAT; > desc.flags |= DSDESC_PREALLOCATED; > desc.caps = DSCAPS_VIDEOONLY; > > desc.width = in_bitmapwidth; /* width of bitmap to display */ > desc.height = in_bitmapheight; /* heigh of bitmap to display */ > desc.pixelformat = DSPF_ARGB; > > desc.preallocated[0].data = in_bitmap; > desc.preallocated[0].pitch = 512 or 1024; /* depending on width of bitmap to > display */ > desc.preallocated[1].data = NULL; > desc.preallocated[1].pitch = 0; > > DFBCHECK(gWavePeerDfb->CreateSurface(gWavePeerDfb, &desc, &newSurface)); The hardware can not access virtual memory, hence operations using this surface will always be done in software. Cheers, Andre' _______________________________________________ directfb-users mailing list directfb-users@directfb.org http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
