Adding gamma correction

CLC-qthing/Controller.cpp

@@ -203,6 +203,8 @@ void CyanLight::Controller::setPWM(uint8_t channel, float value) {
     return;
   }
 
+  value = this->gammaCorrector(value);
+
   if (value < 0.0f) value = 0.0f;
   if (value > 1.0f) value = 1.0f;
 
@@ -213,6 +215,11 @@ void CyanLight::Controller::setPWM(uint8_t channel, float value) {
 }
 
 
+void CyanLight::Controller::setGammaCorrector(GammaCorrector gammaCorrector) {
+  this->gammaCorrector = gammaCorrector;
+}
+
+
 bool CyanLight::Controller::setFrqRes(uint32_t frq_hz, uint8_t res_bits) {
 
   this->timer_cfg.duty_resolution = (ledc_timer_bit_t)res_bits;

CLC-qthing/CyanLightControl.hpp

@@ -16,7 +16,7 @@ namespace CyanLight {
   const uint8_t channelGPIOS[MAX_CHANNELS] = { 27, 16, 17, 18, 19, 21 };
 
   typedef std::function<void()> PacketHandledCallback;
-
+  typedef std::function<float(float)> GammaCorrector;
 
   class Controller {
     public:
@@ -24,6 +24,7 @@ namespace CyanLight {
 
       void setPWM(uint8_t channel, float value);
 
+      void setGammaCorrector(GammaCorrector gammaCorrector);
 
       uint8_t getChannelCount();
 
@@ -62,6 +63,8 @@ namespace CyanLight {
 
       ledc_timer_config_t timer_cfg;
 
+      GammaCorrector gammaCorrector = [](float f) { return f*f; };
+
       PacketHandledCallback packetCallback = []() {};
       void callPacketCallback();
   };