[maemo-developers] [Announce] SDL w/ X11/EGL/GLES2 backend for Harmattan

[From: Marcin Mielniczuk]

Will this version be able to resize 854x480 apps from Harmattan to 800x480
Fremantle resolution?
--
Marcin



2012/8/7 Ville Syrjälä <syrjala at sci.fi>

> Some time ago I started fiddling around with SDL. I didn't even want to
> think about using the pvr2d stuff, so I decided to implement hardware
> acceleration using EGL/GLES2.
>
> I took some version of the harmattan SDL port, removed the pvr2d stuff,
> and added the EGL/GLES2 stuff to the X11 video code. It's not very
> cleanly added, and I'm sure there are various issues with window
> re-creation and whatnot.
>
> Features:
> - EGL/GLES2 based, no pvr2d stuff
> - Always uses a shadow buffer, because preserved flips aren't supported on
>   the platform.
> - Automagically scales the application content to fullscreen using the GPU.
> - Software access to hardware surfaces implemented with glFinish() and
>   EGL_KHR_lock_surface. I initially tried to use EGL_KHR_fence_sync instead
>   of glFinish() but there seemed to be some flushing bug left in the driver
>   causing problems. glFinish() should be OK on pvr, but on some other
>   hardware it could be a problem. So it's not the most portable solution.
> - Supports color keyed and alpha blended blits. Only color keying has
>   actually been tested.
> - some SDL tests, uqm and scummvm seem to work reasonably well
>
> The code is here [1] in case anyone is interested. It was languishing on
> my hard drive already for some time, and since I wasn't able to motivate
> myself to work on it further, I decided to set if free as is. The git
> history is a bit of a mess, but ATM I'm too lazy to clean it up.
>
> [1] https://gitorious.org/harmattan-sdl/sdl
>
> --
> Ville Syrjälä
> syrjala at sci.fi
> http://www.sci.fi/~syrjala/
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>
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