figments: renderer: move power management directly into the renderer

lib/Figments/Renderer.cpp

@@ -18,7 +18,12 @@ Renderer::lastFigmentName()
 void
 Renderer::loop()
 {
+    m_powerState.update();
+    m_brightness.update();
+
+    uint16_t totalPower = 0;
     for(Display* dpy : m_displays) {
+        totalPower += calculate_unscaled_power_mW(dpy->pixelBacking(), dpy->pixelCount());
         for(Figment* figment : m_figments) {
             if (figment->state == Task::Running) {
 #if defined(BOARD_ESP32) or defined(BOARD_ESP8266)
@@ -38,10 +43,42 @@ Renderer::loop()
             }
         };
     }
-    FastLED.show();
+    const uint8_t videoBrightness = brighten8_video(m_powerState);
+    FastLED.show(powerScale(videoBrightness, totalPower));
     FastLED.countFPS();
 }
 
+void
+Renderer::handleEvent(const InputEvent& evt)
+{
+    switch (evt.intent) {
+        case InputEvent::PowerToggle:
+          m_powerState = m_powerState.value() <= 128 ? 255 : 0;
+          Log.notice("Power toggled to %t", m_powerState);
+          break;
+        case InputEvent::SetPower:
+          m_powerState = evt.asInt() == 0 ? 0 : 255;
+          Log.notice("Power state is now %t", m_powerState);
+          break;
+        case InputEvent::SetBrightness:
+          m_brightness = evt.asInt();
+          break;
+    }
+}
+
+uint8_t
+Renderer::powerScale(uint8_t target, uint32_t totalPower) const
+{
+  if (m_powerManaged) {
+    uint32_t requested = ((uint32_t)totalPower * target) / 256;
+    if (requested > totalPower) {
+      return (uint32_t)((uint8_t)(target) * (uint32_t)(totalPower)) / ((uint32_t)(requested));
+    }
+  }
+
+  return target;
+}
+
 void
 Renderer::onStart()
 {
@@ -50,3 +87,27 @@ Renderer::onStart()
     }
     FastLED.show();
 }
+
+void
+Renderer::doOn(Args& args, Print& print)
+{}
+
+void
+Renderer::doOff(Args& args, Print& print)
+{}
+
+void
+Renderer::doBrightness(Args& args, Print& print)
+{}
+
+const std::vector<Command>&
+Renderer::commands() const
+{
+  static const std::vector<Command> _commands = {
+    Command{"brightness", &Renderer::doBrightness},
+    Command{"on", &Renderer::doOn},
+    Command{"off", &Renderer::doOff}
+  };
+
+  return _commands;
+}

lib/Figments/Renderer.h

@@ -1,4 +1,6 @@
 #include "./Figment.h"
+#include "./Animation.h"
+#include "./Input.h"
 #include <vector>
 
 class Display;
@@ -9,10 +11,26 @@ public:
 
     void loop() override;
     void onStart() override;
+    void handleEvent(const InputEvent& evt) override;
 
     static const char* lastFigmentName();
 
+    const std::vector<Command>& commands() const override;
+
 private:
     const std::vector<Figment*> m_figments;
     const std::vector<Display*> m_displays;
+
+    AnimatedNumber m_powerState = 255;
+    AnimatedNumber m_brightness = 255;
+    bool m_powerManaged = true;
+
+    uint8_t m_voltage;
+    uint8_t m_milliamps;
+
+    uint8_t powerScale(uint8_t target, uint32_t totalPower) const;
+
+    void doBrightness(Args& args, Print& print);
+    void doOn(Args& args, Print& print);
+    void doOff(Args& args, Print& print);
 };