ext Frantisek Dufka wrote: > Visti Andresen wrote: > >> My "flashingTest" reports that: >> It got a hardware surface (I should be writing directly to "video >> memory" accordingly to the SDL docs) >> And the surface is double buffered. >> >> The size of the surface is 800x480 16 bit (R5G6B5) >> So there should be at least 1536000 bytes of video memory >> >> I suppose the kernel display driver is open-source? > > Yes, it is. And I _did_ look at it. And somehow I don't think SDL > hardware surface really means memory in Epson HWA742 controller :-) > That's why I asked. >
I think there's no guarantee that you will get "HW surface" from SDL, it will silently fallback to SW surface if it cannot have HW one. SDL draws to X, X draws to the framebuffer mapped by kernel which then updates that data to the lcd controller where screen gets finally updated. I would recommend to blit things in memory, then push only needed parts with SDL_UpdateRects trying to avoid fullscreen updates. > Frantisek > // Tapani > _______________________________________________ > maemo-developers mailing list > maemo-developers@maemo.org > https://maemo.org/mailman/listinfo/maemo-developers > _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
