[PATCH 1/4] d3d9/tests: Test more formats in srgbtexture_test().

[Henri Verbeet]

On Tue, 21 Jan 2020 at 18:46, Paul Gofman <gofmanp at gmail.com> wrote:
> I've tested the game with AMD graphics card override under Wine
> (VideoPciVendorID 0x1002, VideoPciDeviceId 0x67df) and it seems to fix
> the rendering on its own. So the game expects _R5G6B5 to have SRGB reads
> supported only if detects the GPU as Nvidia (at least), otherwise it
> works some other way. Yet I suppose adding the SRGB read support as on
> Nvidia might be a valid fix unless we want to make the support depend on
> the reported video card.
>
It's a little unfortunate to use GL_SRGB8 for R5G6B5 because it
implies conversions on uploads and downloads, as well as doubling GPU
memory usage for the affected formats. I don't think that's
necessarily prohibitive, but if there's a reasonable way to avoid
supporting sRGB reads on these formats, I think that would be
preferred.