Hi Tom,

you are right in noting that there is no such thing as a reference backend. I do most of the testing with x11 myself.

x11: easy to maintain, easy to test. Pretty 'default', so will cover most areas. Cons: no resolution or colour format switching supported. res & format fixed in config file. Weak support for multi-buffering. fbdev or devmem: most flexible. Hardware acceleration for supported cards, this includes TextureTriangles (which has no software fallback).

I would advice to pick fbdev here, but make sure you have a well-supported card that supports the basic resolutions and colour formats (that's the catch with fbdev). I am sure there are more considerations I've forgotten, but this will get you pretty far. It would also most closely match the way in which it will be used.

Greets
Niels

Tom Cooksey wrote:
Hi,

I help maintain Qt's DirectFB backend. I'm looking for a "reference" DirectFB backend we can run (& fix) our autotests against. There appears to be several candidates:

fbdev
sdl
x11

Of these, I've personally found x11 to be pretty useful. However, I'm not sure if it should be the one we use as a reference. What would be nice is to test bugs reported by customers on the reference platform to see if the bug really is with Qt, or if it's with their DirectFB implementation.

Any advice would be very welcome!



Cheers,

Tom


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