On Feb 17, 2008 9:56 PM, Tobias Oberstein <[EMAIL PROTECTED]> wrote: [...]
> I've read a lot of bits on the web 'bout mplayer, vsync, omapfb etc. > and tried to assemble a minimal example of using direct framebuffer > access for gfx output. > > Q: I can't get the tearing away (only fixed at certain line positions). > What am I doing wrong? Transfer framebuffer->videoram must be fast enough to complete for the period of two LCD refresh cycles, also see http://lists.maemo.org/pipermail//maemo-developers/2007-March/009202.html Using smaller source rectangle in the framebuffer will reduce data transfer time and the tearing line at the bottom will disappear (using 'new' screen update ioctl which was introduced in N800 kernel, this rectangle can be upscaled to fullscreen). You can calculate the resolution which can be used without tearing either theoretically or in an experimental way. > I wondered if there would be any plans to make SDL run directly on > framebuffer .. if not, I'd maybe give it a try. > > Q: Where can I find the sources to the OS2008 SDL? AFAIK, SDL is used pretty much unmodified. My guess is that you can get it here: http://repository.maemo.org/pool/chinook/free/source/ As for some practical solution on N800/N810, I think it makes sense tweaking xserver to add support rgb color format in Xv and tweaking SDL to use Xv for the emulation of setting arbitrary screen resolutions (setting low resolution will eliminate tearing and will be useful for games). For those interested in the topic, documentation for the Epson LCD controller used in N8x0 (S1D13745) is available here: http://vdc.epson.com/index.php?option=com_docman&task=cat_view&gid=38&Itemid=40 _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
