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use a bezier curve to get the brightness percent

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Alessandro Mauri 2024-10-20 14:23:51 +02:00
parent 35ac14a0ea
commit 607dff0396
1 changed files with 8 additions and 1 deletions
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9
ambientd.c
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@ -55,6 +55,13 @@ int read_int(FILE *fp)
return r; return r;
} }
float bezier(float t)
{
const float B = 0.66;
const float D = 0.28;
return 3*B*t+(3*D-6*B)*t*t+(1+3*B-3*D)*t*t*t;
}
// TODO: add some command line options like: // TODO: add some command line options like:
// -v: verbose/logging // -v: verbose/logging
// -c file; specify a config file // -c file; specify a config file
@ -123,7 +130,7 @@ int main (void)
for (int i = 0; i < MEDIAN_SAMPLES; i++) { for (int i = 0; i < MEDIAN_SAMPLES; i++) {
luminance += luminance_samples[i] / MEDIAN_SAMPLES; luminance += luminance_samples[i] / MEDIAN_SAMPLES;
} }
luminance_percent = MIN(luminance/max_luminance, 1.0); luminance_percent = bezier(MIN(luminance/max_luminance, 1.0));
brightness_old = brightness_target; brightness_old = brightness_target;
brightness_target = MAX((int)(luminance_percent * max_brightness), min_brightness); brightness_target = MAX((int)(luminance_percent * max_brightness), min_brightness);