A straight copy from sysmem to vidmem is pretty fast, but if you do per-pixel operations, it''s slow as hell.
What I do for 2D stuff is just do everything in system memory, have a system memory "back" buffer the same format as the primary surface and just update that, and copy it to the primary surface at the end of the screen. It''s bound to be fast, cause that''s how they did it back in the VGA days
- JQ
Full Speed Games. Coming soon.
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