[PATCH 2/5] d3d9/tests: Add a test for UpdateTexture.

[Stefan Dösinger]

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Am 2015-03-16 um 17:38 schrieb Matteo Bruni:
> On AMD UpdateTexture seems to always convert data between
> different formats (e.g. A8R8G8B8 -> R32F, red has the correct
> converted values). I'm not sure about the UNORM -> SNORM
> conversion, that one might be broken but I didn't look very hard
> into it. On Nvidia it looks like data is copied if the source and
> destination formats have the same bpp (e.g. UNORM -> SNORM, but
> even A8R8G8B8 -> R32F gives the expected result of a
> "reinterpretation" of the data as in the destination format),
> otherwise nothing happens and the destination texture stays black.
> When it does work data is just copied, e.g. the X channel is copied
> intact into the A channel in X8R8G8B8 -> A8R8G8B8. For what it's
> worth, the X channel seems to be preserved on AMD too.
Thanks for testing this. I'll at some later point do a similar test
with ddraw blits. We know ddraw blits can stretch, convert between
formats and transfer between different memory pools, but so far we
don't know if they can do all 3 of those things at once.

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