Speed of gdi vs opengl DirectDrawRenderer

[Stefan Dösinger]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

Am 2015-02-19 um 21:12 schrieb Jonas Maebe:
> I profiled wine (Instruments time profile) and noticed that most 
> time was spent in wined3d's convert_r5g6b5_x8r8g8b8. Replacing
> that routine with an optimized sse2 version from pixman did not
> make much of a difference.
Is there a demo version of this game somewhere? I am reworking the d3d
blitting code at the moment, and it seems like this would be an
interesting game to look at.

If the game does video memory r5g6b5 to video memory x8r8g8b8 blits
then we should be able to do this on the GPU. It's quite possible
however that this is either a system memory to system memory blit, in
which case doing this in the CPU is the correct thing. If the game
uploads from a system memory r5g6b5 to a video memory x8r8g8b8 texture
then we can in theory let OpenGL do the work via glTexSubImage2D, but
it'll mostly mean that OpenGL converts the data using the CPU before
sending it to the GPU.

This may be a game bug - you say the game has troubles on Windows too.
It may also be a bug in our modesetting code, in the sense that the
game sets the display format to r5g6b5, but we stay at x8r8g8b8
because X11 (and I think OSX, Ken correct me please) can't switch the
color depth. Ideally OpenGL takes care of the resulting conversion,
but that's not always the case.

Cheers,
Stefan
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
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=uDdp
-----END PGP SIGNATURE-----