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first stab at hardware gamma support for windows. WILL screw up system gamma :)

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This commit is contained in:
Bill Currie 2002-02-26 00:14:16 +00:00
parent 6ba5e823b2
commit cfb6c1db0a
1 changed files with 36 additions and 2 deletions
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38
libs/video/targets/vid_wgl.c
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@ -1129,9 +1129,43 @@ VID_SetCaption (const char *text)
}
}
static WORD systemgammaramps[3][256];
static WORD currentgammaramps[3][256];
qboolean
VID_SetGamma (double gamma)
{
// FIXME: Need function for HW gamma correction
return false;
int i;
HDC hdc = GetDC (NULL);
for (i = 0; i < 256; i++) {
currentgammaramps[2][i] =
currentgammaramps[1][i] =
currentgammaramps[0][i] = gammatable[i] * 256;
}
i = SetDeviceGammaRamp (hdc, &currentgammaramps[0][0]);
ReleaseDC (NULL, hdc);
return i;
}
void
VID_SaveGamma (void)
{
HDC hdc = GetDC (NULL);
GetDeviceGammaRamp (hdc, &systemgammaramps[0][0]);
ReleaseDC (NULL, hdc);
}
void
VID_RestoreGamma (void)
{
HDC hdc = GetDC (NULL);
SetDeviceGammaRamp (hdc, &systemgammaramps[0][0]);
ReleaseDC (NULL, hdc);
}