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Merge pull request #46 from maandree/gamma

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Apply gamma after brightness and temperature
This commit is contained in:
Jon Lund Steffensen
2014-03-23 00:00:54 +01:00
parent 09efaddd23 b724bf06c9
commit ee7252e6fd
1 changed files with 5 additions and 6 deletions
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src/colorramp.c
+5 -6
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@@ -291,12 +291,11 @@ colorramp_fill(uint16_t *gamma_r, uint16_t *gamma_g, uint16_t *gamma_b,
interpolate_color(alpha, &blackbody_color[temp_index],
&blackbody_color[temp_index+3], white_point);
#define F(Y, C) pow((Y) * brightness * white_point[C], 1.0/gamma[C])
for (int i = 0; i < size; i++) {
gamma_r[i] = pow((float)i/size, 1.0/gamma[0]) *
(UINT16_MAX+1) * brightness * white_point[0];
gamma_g[i] = pow((float)i/size, 1.0/gamma[1]) *
(UINT16_MAX+1) * brightness * white_point[1];
gamma_b[i] = pow((float)i/size, 1.0/gamma[2]) *
(UINT16_MAX+1) * brightness * white_point[2];
gamma_r[i] = F((float)i/size, 0) * (UINT16_MAX+1);
gamma_g[i] = F((float)i/size, 1) * (UINT16_MAX+1);
gamma_b[i] = F((float)i/size, 2) * (UINT16_MAX+1);
}
}