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examples/gamma-control: fix brightness formula

This commit is contained in:
emersion 2018-07-25 14:46:50 +01:00
parent b0c32019c3
commit 2ae0575631
1 changed files with 1 additions and 1 deletions
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2
examples/gamma-control.c
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@ -115,7 +115,7 @@ static void fill_gamma_table(uint16_t *table, uint32_t ramp_size,
uint16_t *b = table + 2 * ramp_size; uint16_t *b = table + 2 * ramp_size;
for (uint32_t i = 0; i < ramp_size; ++i) { for (uint32_t i = 0; i < ramp_size; ++i) {
double val = (double)i / (ramp_size - 1); 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) { if (val > 1.0) {
val = 1.0; val = 1.0;
} else if (val < 0.0) { } else if (val < 0.0) {