[PATCH] ddraw: add dsurface dimension tests, try 5

[Stefan Dösinger]

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Am 2013-12-14 12:34, schrieb Patrick Rudolph:
> +    /* Test maximum surface width */ +    memset(&desc, 0,
> sizeof(desc)); +    desc.dwSize = sizeof(desc); +    desc.dwFlags =
> DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH; +    desc.ddsCaps.dwCaps |=
> DDSCAPS_OFFSCREENPLAIN; +    desc.dwHeight = 1; +    desc.dwWidth =
> 0xffff; +    ret = IDirectDraw_CreateSurface(lpDD, &desc,
> &dsurface, NULL); +    if(!(ddcaps.ddsCaps.dwCaps &
> DDSCAPS_VIDEOMEMORY)) +    { +        ok(ret ==
> DDERR_INVALIDPARAMS, "Creating an offscreen plain surface with
> width 0xffff and height 1 returned %08x\n", ret); +    } +    else 
> +    { +        todo_wine ok(ret == DD_OK, "Creating an offscreen
> plain surface with width 0xffff and height 1 returned %08x\n",
> ret); +    }
I found the reason for this behavior. Some drivers seem to have a
pitch limit of slightly under 128kb, specifically 131008 bytes. If you
use a P8 pixel format here, the test passes on at least my Nvidia
machine with this behavior.

The same machine still has the 0xffff width limitation. So a 0x10000
width P8 surface isn't allowed, even though the pitch stays below the
limit.

I guess you could test for the pitch limit by setting DDSD_PITCH,
either in CreateSurface, if it works, or pass it to SetSurfaceDesc. I
don't think we have to test this unless we know an application that
depends on this limitation - which I guess is unlikely because not all
Windows drivers have it.

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