examples/gamma-control: fix brightness formula

6 years ago · 2ae0575631
parent b0c32019c3
commit 2ae0575631
1 changed files with 1 additions and 1 deletions
--- a/examples/gamma-control.c
+++ b/examples/gamma-control.c
@ -115,7 +115,7 @@ static void fill_gamma_table(uint16_t *table, uint32_t ramp_size,
 	uint16_t *b = table + 2 * ramp_size;
 	for (uint32_t i = 0; i < ramp_size; ++i) {
 		double val = (double)i / (ramp_size - 1);
-		val = contrast * pow(val, 1.0 / gamma) + (1 - brightness);
+		val = contrast * pow(val, 1.0 / gamma) + (brightness - 1);
 		if (val > 1.0) {
 			val = 1.0;
 		} else if (val < 0.0) {