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Use float pow for pico unicorn gamma 

Looks like that was intended based on the float cast and all the f suffixes...
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Charlie Birks 2022-05-23 14:09:50 +01:00 committed by GitHub
parent a4f91a93ee
commit 8be98da0e5
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1 changed files with 3 additions and 3 deletions
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libraries/pico_unicorn/pico_unicorn.cpp
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@ -144,13 +144,13 @@ namespace pimoroni {
// gamma correct the provided 0-255 brightness value onto a
// 0-65535 range for the pwm counter
float r_gamma = 2.8f;
r_gamma_lut[v] = (uint16_t)(pow((float)(v) / 255.0f, r_gamma) * 16383.0f + 0.5f);
r_gamma_lut[v] = (uint16_t)(powf((float)(v) / 255.0f, r_gamma) * 16383.0f + 0.5f);
float g_gamma = 2.8f;
g_gamma_lut[v] = (uint16_t)(pow((float)(v) / 255.0f, g_gamma) * 16383.0f + 0.5f);
g_gamma_lut[v] = (uint16_t)(powf((float)(v) / 255.0f, g_gamma) * 16383.0f + 0.5f);
float b_gamma = 2.8f;
b_gamma_lut[v] = (uint16_t)(pow((float)(v) / 255.0f, b_gamma) * 16383.0f + 0.5f);
b_gamma_lut[v] = (uint16_t)(powf((float)(v) / 255.0f, b_gamma) * 16383.0f + 0.5f);
}
// initialise the bcd timing values and row selects in the bitstream