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wined3d: Remove division from inner loop.

This commit is contained in:
Michael Abbott 2009-06-16 16:20:05 +01:00 committed by Alexandre Julliard
parent c6dffb6df8
commit 2e119a2718
1 changed files with 5 additions and 3 deletions
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8
dlls/wined3d/surface.c
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@ -2461,9 +2461,11 @@ static HRESULT d3dfmt_convert_surface(const BYTE *src, BYTE *dst, UINT pitch, UI
for (x = 0; x < width; ++x) for (x = 0; x < width; ++x)
{ {
/* The depth data is normalized, so needs to be scaled, the stencil data isn't. */ /* The depth data is normalized, so needs to be scaled,
WORD d15 = source[x] & 0xfffe; * the stencil data isn't. Scale depth data by
DWORD d24 = d15 * 0x100 + (d15 * 0xff80 + 0x3fff80) / 0x7fff00; * (2^24-1)/(2^15-1) ~~ (2^9 + 2^-6). */
WORD d15 = source[x] >> 1;
DWORD d24 = (d15 << 9) + (d15 >> 6);
dest[x] = (d24 << 8) | (source[x] & 0x1); dest[x] = (d24 << 8) | (source[x] & 0x1);
} }
} }