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Fixed gamma calculation, round return value.

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This commit is contained in:
Toni Wilen 2016-02-14 18:34:04 +02:00
parent ac1fa24e4c
commit e0700629d7
1 changed files with 4 additions and 3 deletions
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7
gfxutil.cpp
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@ -140,7 +140,7 @@ static void video_calc_gammatable (void)
bri = ((float)(currprefs.gfx_luminance)) * (128.0f / 1000.0f);
con = ((float)(currprefs.gfx_contrast + 1000)) / 1000.0f;
gam = ((float)(1000 - currprefs.gfx_gamma)) / 1000.0f;
gam = ((float)(1000 - currprefs.gfx_gamma)) / 1000.0f - 1.0;
gams[0] = gam + ((float)(1000 - currprefs.gfx_gamma_ch[0])) / 1000.0f;
gams[1] = gam + ((float)(1000 - currprefs.gfx_gamma_ch[1])) / 1000.0f;
gams[2] = gam + ((float)(1000 - currprefs.gfx_gamma_ch[2])) / 1000.0f;
@ -161,7 +161,8 @@ static void video_calc_gammatable (void)
val = (val * 252.0) / 238.0;
}
if (currprefs.gfx_luminance == 0 && currprefs.gfx_contrast == 0 && currprefs.gfx_gamma == 0) {
if (currprefs.gfx_luminance == 0 && currprefs.gfx_contrast == 0 && currprefs.gfx_gamma == 0 &&
currprefs.gfx_gamma_ch[0] == 0 && currprefs.gfx_gamma_ch[1] == 0 && currprefs.gfx_gamma_ch[2] == 0) {
v = val;
} else {
v = video_gamma(val, gams[j], bri, con);
@ -172,7 +173,7 @@ static void video_calc_gammatable (void)
if (v > 255.0)
v = 255.0;
gamma[i][j] = (uae_u32)v;
gamma[i][j] = (uae_u32)(v + 0.5);
}
}
}