setBrightness safe handling + return

src/demo/NodeTest.h

@@ -7,7 +7,7 @@
 
 Config config("/test.json");
 
-DisplayMatrix<32, 8> display(27);
+DisplayMatrix<32, 8> display(13);
 
 class NodeTest final : public PatrixNode {
 
@@ -19,18 +19,10 @@ public:
 
   void setup() override {
     config.read();
-    display.setup();
+    display.setup(10);
-    display.setBrightness(6);
-
     display.clear();
-
+    display.printf(1, 1, LEFT, Blue, "Test");
-    display.foreground = Blue;
+    display.drawLine(0, 7, 32, 0, 1, Red);
-    display.printf("Test");
-
-    display.foreground = Red;
-    display.cursorX = 0;
-    display.cursorY = 7;
-    display.drawLine(32, 0);
   }
 
   void loop() override {

src/patrix/Patrix.cpp

@@ -4,7 +4,6 @@ void setup() {
   logSetup();
   bootDelay();
   patrixNode.setup();
-  httpSetup();
 }
 
 void loop() {

src/patrix/core/Config.h

@@ -15,14 +15,14 @@ class Config final {
 
   const String path;
 
-  JsonDocument config;
-
   unsigned long dirty = 0;
 
   bool doForceNextHexBuffer = true;
 
 public:
 
+  JsonDocument json;
+
   explicit Config(String path) : path(std::move(path)) {
     //
   }
@@ -33,12 +33,12 @@ public:
     fsMount();
     auto file = LittleFS.open(path, "r");
     if (!file) {
-      error("failed to open file for config: %s", path.c_str());
+      error("Failed to open file for config: %s", path.c_str());
       return;
     }
     if (!deserialize(file)) {
-      config.clear();
+      json.clear();
-      config = config.to<JsonObject>();
+      json = json.to<JsonObject>();
     }
     file.close();
   }
@@ -47,16 +47,16 @@ public:
     fsMount();
     auto write = LittleFS.open(path, "w");
     if (!write) {
-      error("failed to open file for config write: %s", path.c_str());
+      error("Failed to open file for config write: %s", path.c_str());
       return;
     }
-    const auto size = measureJson(config);
+    const auto size = measureJson(json);
-    if (serializeJson(config, write) == size) {
+    if (serializeJson(json, write) == size) {
       char buffer[256];
-      serializeJson(config, buffer, sizeof buffer);
+      serializeJson(json, buffer, sizeof buffer);
-      info("config written: %s => %s", path.c_str(), buffer);
+      info("Config written: %s => %s", path.c_str(), buffer);
     } else {
-      error("failed to write config: %s", path.c_str());
+      error("Failed to write config: %s", path.c_str());
     }
     write.close();
   }
@@ -69,35 +69,82 @@ public:
   }
 
   template<typename T>
-  T get(const char *key, T fallback) {
+  bool has(const char *key) {
-    if (config[key].is<T>()) {
+    return json[key].is<T>();
-      return config[key].as<T>();
-    }
-    warn("config key \"%s\" not found!", key);
-    return fallback;
   }
 
   template<typename T>
-  void set(const char *key, T value) {
+  T get(const char *key, T fallback) {
-    config[key] = value;
+    if (json[key].is<T>()) {
-    dirty = max(1UL, millis()); // avoid special value zero (=> not dirty)
+      return json[key].as<T>();
+    }
+    warn("Config key \"%s\" not found!", key);
+    return fallback;
+  }
+
+  bool setIfNot(const char *key, const int value) {
+    auto changed = !json[key].is<int>();
+    if (!changed) {
+      changed = json[key].as<int>() != value;
+    }
+    if (changed) {
+      set(key, value);
+      info("Changed key \"%s\" to: %d", key, value);
+    }
+    return changed;
+  }
+
+  bool setIfNot(const char *key, const double value) {
+    auto changed = !json[key].is<double>();
+    if (!changed) {
+      changed = json[key].as<double>() != value;
+    }
+    if (changed) {
+      set(key, value);
+      info("Changed key \"%s\" to: %d", key, value);
+    }
+    return changed;
+  }
+
+  template<typename T>
+  void set(const String& key, T value) {
+    json[key] = value;
+    dirty = millis();
+    if (dirty == 0) {
+      // avoid special value zero (=> not dirty)
+      dirty--;
+    }
+  }
+
+  unsigned long getAutoWriteInMillis() const {
+    if (dirty == 0) {
+      return 0;
+    }
+    return CONFIG_WRITE_DELAY_MILLIS - (millis() - dirty);
+  }
+
+  time_t getAutoWriteAtEpoch() const {
+    if (dirty == 0) {
+      return 0;
+    }
+    return time(nullptr) + static_cast<long>(getAutoWriteInMillis() / 1000);
   }
 
 private:
 
   bool deserialize(File file) {
-    if (deserializeJson(config, file) != DeserializationError::Ok) {
+    if (deserializeJson(json, file) != DeserializationError::Ok) {
-      error("failed to deserialize config: %s", file.path());
+      error("Failed to deserialize config: %s", file.path());
       return false;
     }
-    if (!config.is<JsonObject>()) {
+    if (!json.is<JsonObject>()) {
-      error("config not a json-object: %s", file.path());
+      error("Config not a json-object: %s", file.path());
       return false;
     }
     char buffer[256];
-    serializeJson(config, buffer, sizeof buffer);
+    serializeJson(json, buffer, sizeof buffer);
-    info("config loaded: %s => %s", path.c_str(), buffer);
+    info("Config loaded: %s => %s", path.c_str(), buffer);
-    config = config.as<JsonObject>();
+    json = json.as<JsonObject>();
     return true;
   }
 

src/patrix/core/boot.cpp

@@ -32,16 +32,28 @@ const char *getResetReason(const RESET_REASON reason) {
   }
 }
 
+bool isFailureReset(const RESET_REASON reason) {
+  switch (reason) {
+    case POWERON_RESET:
+    case SW_RESET:
+    case DEEPSLEEP_RESET:
+    case SDIO_RESET:
+    case SW_CPU_RESET:
+    case EXT_CPU_RESET: return false;
+    default: return true;
+  }
+}
+
 void bootReasonLoad() {
   const auto r0 = rtc_get_reset_reason(0);
   const auto r1 = rtc_get_reset_reason(1);
-  failureReset = (r0 != POWERON_RESET && r0 != DEEPSLEEP_RESET) || (r1 != POWERON_RESET && r1 != DEEPSLEEP_RESET);
+  failureReset = isFailureReset(r0) || isFailureReset(r1);
   if (failureReset) {
     warn("Forcing OTA delay because of failure-reset: r0=%s, r1=%s", getResetReason(r0), getResetReason(r1));
   }
 }
 
-void boot_waitForWifi() {
+void boot_waitForWiFi() {
   info("Waiting for WiFi...");
   while (!isWiFiConnected()) {
     wifiLoop();
@@ -77,7 +89,7 @@ void bootDelay() {
 
   info("Boot delay active...");
 
-  boot_waitForWifi();
+  boot_waitForWiFi();
 
   if (failureReset || patrixNode.waitForOTA) {
     boot_waitForOTA();

src/patrix/core/clock.cpp

@@ -27,17 +27,16 @@ void clockLoop() {
   const auto now = time(nullptr);
   if (isCorrectTime(now)) {
     startupTime = now - clockOffset;
-    info("clock set after %ld seconds! So startup was at %s", clockOffset, getStartupStr());
+    info("Clock set after %ld seconds! So startup was at %s", clockOffset, getStartupStr());
   } else {
     clockOffset = now;
   }
 }
 
 bool isClockSet() {
-  return startupTime != 0;
+  return isCorrectTime(time(nullptr));
 }
 
-
 char *getClockStr(const time_t epoch) {
   auto now = epoch;
   if (now == 0) {

src/patrix/core/filesystem.cpp

@@ -7,13 +7,14 @@
 auto fsMounted = false;
 
 bool fsMount() {
-  if (!fsMounted) {
-    fsMounted = LittleFS.begin(true);
-  }
   if (fsMounted) {
-    info("filesystem mounted: %3d%% used (%d bytes)", static_cast<int>(round(100.0 * LittleFS.usedBytes() / LittleFS.totalBytes())), LittleFS.usedBytes());
+    return true;
+  }
+  fsMounted = LittleFS.begin(true);
+  if (fsMounted) {
+    info("Filesystem mounted: %3d%% used (%d bytes)", static_cast<int>(round(100.0 * LittleFS.usedBytes() / LittleFS.totalBytes())), LittleFS.usedBytes());
   } else {
-    error("failed to mount filesystem");
+    error("Failed to mount filesystem");
   }
   return fsMounted;
 }
@@ -25,11 +26,11 @@ bool fsIsMounted() {
 void fsList(FS& fs, const char *path, const String& indent) { // NOLINT(*-no-recursion)
   auto dir = fs.open(path);
   if (!dir) {
-    error("not found: %s", path);
+    error("Not found: %s", path);
     return;
   }
   if (!dir.isDirectory()) {
-    error("not a directory: %s", path);
+    error("Not a directory: %s", path);
     return;
   }
 

src/patrix/core/http.cpp

@@ -1,12 +1,18 @@
 #include <ESPAsyncWebServer.h>
+#include <LittleFS.h>
 #include <patrix/core/log.h>
 #include <patrix/core/system.h>
 #include <patrix/node/PatrixNode.h>
 
+#include "filesystem.h"
+#include "wifi.h"
+
 AsyncWebServer server(80);
 
 AsyncWebSocket ws("/ws");
 
+auto httpSetUp = false;
+
 void httpReboot(AsyncWebServerRequest *request) {
   info("Rebooting...");
   request->redirect("/");
@@ -18,12 +24,13 @@ void httpReboot(AsyncWebServerRequest *request) {
 }
 
 void httpSetup() {
+  fsMount();
   ws.onEvent([](AsyncWebSocket *socket, AsyncWebSocketClient *client, AwsEventType type, void *arg, unsigned char *message, unsigned length) {
     const char *t;
     switch (type) {
       case WS_EVT_CONNECT:
         t = "CONNECT";
-        patrixNode.websocketEvent(socket, client,  type, arg, message,  length);
+        patrixNode.websocketEvent(socket, client, type, arg, message, length);
         break;
       case WS_EVT_DISCONNECT:
         t = "DISCONNECT";
@@ -45,14 +52,29 @@ void httpSetup() {
   });
   server.addHandler(&ws);
 
+  server.serveStatic("/", LittleFS, "/http/");
   server.on("/reboot", HTTP_GET, httpReboot);
   server.begin();
+
+  DefaultHeaders::Instance().addHeader("Access-Control-Allow-Origin", "*");
+  DefaultHeaders::Instance().addHeader("Access-Control-Allow-Methods", "GET, POST, PUT");
+  DefaultHeaders::Instance().addHeader("Access-Control-Allow-Headers", "Content-Type");
+
+  httpSetUp = true;
+  info("Webserver started.");
 }
 
 void httpLoop() {
-  ws.cleanupClients();
+  if (!httpSetUp && isWiFiConnected()) {
+    httpSetup();
+  }
+  if (httpSetUp) {
+    ws.cleanupClients();
+  }
 }
 
 void websocketSendAll(const String& payload) {
-  ws.textAll(payload);
+  if (httpSetUp) {
+    ws.textAll(payload);
+  }
 }

src/patrix/core/http.h

@@ -1,9 +1,9 @@
 #ifndef PATRIX_HTTP_H
 #define PATRIX_HTTP_H
 
-#include <Arduino.h>
+#include <ESPAsyncWebServer.h>
 
-void httpSetup();
+extern AsyncWebServer server;
 
 void httpLoop();
 

src/patrix/core/mqtt.cpp

@@ -3,6 +3,7 @@
 #include <patrix/core/log.h>
 #include <patrix/core/mqtt.h>
 #include <patrix/core/wifi.h>
+#include <patrix/node/PatrixNode.h>
 
 #define MQTT_RETRY_DELAY_MILLIS         3000
 
@@ -32,14 +33,25 @@ void mqttLoop() {
     mqtt.setKeepAlive(10);
     mqtt.setBufferSize(512);
     mqttLastConnectMillis = millis();
-    info("mqtt connecting: host=%s, port=%d", mqttHost, mqttPort);
+    info("MQTT connecting: host=%s, port=%d", mqttHost, mqttPort);
     if (mqtt.connect(WiFiClass::getHostname(), mqttWillTopic, 1, true, "false")) {
-      info("mqtt connected");
+      info("MQTT connected");
       yield();
       mqtt.publish(mqttWillTopic, "true", true);
+      mqtt.setCallback([](char *topic, uint8_t *payload, unsigned int length) {
+        char message[128];
+        if (length > sizeof message - 1) {
+          Serial.printf("MQTT: received too long message: topic=%s, length=%d", topic, length);
+          return;
+        }
+        memcpy(message, payload, length);
+        message[length] = 0;
+        patrixNode.mqttMessage(topic, message);
+        yield();
+      });
       yield();
     } else {
-      error("mqtt failed to connect");
+      error("MQTT failed to connect");
     }
   }
 }
@@ -47,3 +59,11 @@ void mqttLoop() {
 bool mqttPublish(const String& topic, const String& payload, const Retain retain) {
   return mqtt.publish(topic.c_str(), payload.c_str(), retain == RETAIN);
 }
+
+void mqttSubscribe(const String& topic) {
+  mqtt.subscribe(topic.c_str());
+}
+
+void mqttUnsubscribe(const String& topic) {
+  mqtt.unsubscribe(topic.c_str());
+}

src/patrix/core/mqtt.h

@@ -11,4 +11,8 @@ void mqttLoop();
 
 bool mqttPublish(const String& topic, const String& payload, Retain retain);
 
+void mqttSubscribe(const String& topic);
+
+void mqttUnsubscribe(const String& topic);
+
 #endif

src/patrix/core/wifi.cpp

@@ -18,7 +18,7 @@ auto wifiHost = WIFI_HOST;
 
 void wifiSetupOTA() {
   ArduinoOTA.onStart([] {
-    info("beginning ota update...");
+    info("Beginning ota update...");
     Serial.print("OTA-UPDATE:   0%");
   });
   ArduinoOTA.onProgress([](const unsigned done, const unsigned total) {
@@ -54,7 +54,7 @@ void wifiSetupOTA() {
 }
 
 void wifiOff() {
-  info("wifi disabled");
+  info("WiFi disabled");
   wifiEnabled = false;
   WiFi.disconnect();
 }
@@ -64,10 +64,10 @@ void wifiLoop() {
   if (wifiConnected != currentState) {
     wifiConnected = currentState;
     if (wifiConnected) {
-      info("wifi connected as %s", WiFi.localIP().toString().c_str());
+      info("WiFi connected as %s", WiFi.localIP().toString().c_str());
       wifiSetupOTA();
     } else {
-      warn("wifi disconnected");
+      warn("WiFi disconnected");
       ArduinoOTA.end();
       WiFi.disconnect();
     }

src/patrix/display/Display.h

@@ -0,0 +1,314 @@
+#ifndef PATRIX_DISPLAY_height
+#define PATRIX_DISPLAY_height
+
+#include <Adafruit_NeoPixel.h>
+
+#include "DisplayMatrix_FontCommon.h"
+#include "DisplayMatrix_FontLower.h"
+#include "DisplayMatrix_FontNumberSegments.h"
+#include "DisplayMatrix_FontSpecial.h"
+#include "DisplayMatrix_FontUpper.h"
+
+#include <patrix/core/log.h>
+
+inline void fixRect(int& x0, int& y0, int& w, int& h) {
+  if (w < 0) {
+    x0 += w;
+    w = -w;
+  }
+  if (h < 0) {
+    y0 += h;
+    h = -h;
+  }
+}
+
+enum Align {
+  LEFT, CENTER, RIGHT
+};
+
+class Display {
+
+  Adafruit_NeoPixel leds;
+
+  bool dirty = true;
+
+protected:
+
+  virtual RGB _read_pixel_(int x, int y) = 0;
+
+  virtual void _write_pixel_(int x, int y, RGBA color) = 0;
+
+public:
+
+  const uint8_t width;
+
+  const uint8_t height;
+
+  const uint16_t pixelCount;
+
+  Display(const int16_t pin, const uint8_t width, const uint8_t height)
+    : leds(width * height, pin),
+      width(width),
+      height(height),
+      pixelCount(width * height) {
+    //
+  }
+
+  virtual ~Display() = default;
+
+  // basic ----------------------------------------------------------------------------------------
+
+  void setup(const int brightness) {
+    leds.begin();
+    setBrightness(brightness);
+    clear();
+  }
+
+  void loop() {
+    if (dirty) {
+      for (auto y = 0; y < height; y++) {
+        for (auto x = 0; x < width; x++) {
+          const auto rgb = _read_pixel_(x, y);
+          const auto index = y * width + (y % 2 == 0 ? x : width - x - 1);
+          leds.setPixelColor(index, rgb.r, rgb.g, rgb.b);
+        }
+      }
+      leds.show();
+      dirty = false;
+    }
+  }
+
+  uint8_t setBrightness(int brightness) {
+    brightness = max(0, min(brightness, 255));
+    if (leds.getBrightness() != brightness) {
+      leds.setBrightness(brightness);
+      dirty = true;
+    }
+    return brightness;
+  }
+
+  uint8_t getBrightness() const {
+    return leds.getBrightness();
+  }
+
+  // draw -----------------------------------------------------------------------------------------
+
+  void clear() {
+    fillRect(0, 0, width, height, Black);
+  }
+
+  void setPixel(const double x, const double y, const RGBA color) {
+    setPixel(static_cast<int>(round(x)), static_cast<int>(round(y)), color);
+  }
+
+  void setPixel(const int x, const int y, const RGBA color) {
+    if (x < 0 || x >= width || y < 0 || y >= height) {
+      return;
+    }
+    _write_pixel_(x, y, color);
+    dirty = true;
+  }
+
+  void fillRect(int x0, int y0, int w, int h, const RGBA color) {
+    fixRect(x0, y0, w, h);
+    for (auto y = y0; y < y0 + h; ++y) {
+      for (auto x = x0; x < x0 + w; ++x) {
+        setPixel(x, y, color);
+      }
+    }
+  }
+
+  void drawLine(int x0, int y0, int w, int h, const int thickness, const RGBA color) {
+    fixRect(x0, y0, w, h);
+    for (auto t = 0; t < thickness; ++t) {
+      const auto offset = t % 2 == 0 ? t / 2 : -t / 2;
+      if (h == 0) {
+        for (auto x = x0; x <= x0 + w; ++x) {
+          setPixel(x, y0, color);
+        }
+      } else if (w == 0) {
+        for (auto y = y0; y <= y0 + h; ++y) {
+          setPixel(x0, y, color);
+        }
+      } else if (w >= h) {
+        const auto m = static_cast<double>(h) / w;
+        for (auto x = x0; x <= x0 + w; ++x) {
+          const auto y = static_cast<int>(round(offset + x * m));
+          setPixel(x, y, color);
+        }
+      } else {
+        const auto m = static_cast<double>(w) / h;
+        for (auto y = y0; y <= y0 + h; ++y) {
+          const auto x = static_cast<int>(round(offset + y * m));
+          setPixel(x, y, color);
+        }
+      }
+    }
+  }
+
+  // print ----------------------------------------------------------------------------------------
+
+  void printf(const int x, const int y, const Align align, const RGBA color, const char *format, ...) {
+    va_list args;
+    va_start(args, format);
+    printf(x, y, align, color, format, args);
+    va_end(args);
+  }
+
+  void printf(const int x, const int y, const Align align, const RGBA color, const char *format, const va_list args) {
+    char buffer[64];
+    vsnprintf(buffer, sizeof buffer, format, args);
+    print(x, y, align, color, buffer);
+  }
+
+  void print(const int x0, const int y0, const Align align, const RGBA color, const char *message) {
+    auto x = x0;
+    auto y = y0;
+    doAlign(x, align, message);
+    print(x, y, color, message, true);
+  }
+
+  void doAlign(int& x, const Align align, const char *message) {
+    if (align != LEFT) {
+      auto w = 0;
+      auto h = 0;
+      measure(message, w, h);
+      if (align == RIGHT) {
+        x = x - w;
+      } else if (align == CENTER) {
+        x = x - w / 2;
+      }
+    } else {}
+  }
+
+  void measure(const char *message, int& w, int& h) {
+    w = 0;
+    h = 0;
+    print(w, h, White, message, false);
+  }
+
+  void print(int& x, int& y, const RGBA color, const char *message, const bool doDraw) {
+    auto character = message;
+    while (*character != '\0') {
+      print(x, x, y, color, &character, doDraw);
+      x++; // separate characters
+    }
+  }
+
+  void print(const int x0, int& x, int& y, const RGBA color, const char **cPP, const bool doDraw) {
+    const auto character = *(*cPP)++;
+
+    if ('0' <= character && character <= '9') {
+      return print(x, y, reinterpret_cast<bool *>(FONT_NUMBER_SEGMENTS[character - '0']), countof(FONT_NUMBER_SEGMENTS[character - '0'][0]), countof(FONT_NUMBER_SEGMENTS[character - '0']), color, doDraw);
+    }
+    if ('A' <= character && character <= 'Z') {
+      return print(x, y, reinterpret_cast<bool *>(FONT_UPPER[character - 'A']), countof(FONT_UPPER[character - 'A'][0]), countof(FONT_UPPER[character - 'A']), color, doDraw);
+    }
+    if ('a' <= character && character <= 'z') {
+      return print(x, y, reinterpret_cast<bool *>(FONT_LOWER[character - 'a']), countof(FONT_LOWER[character - 'a'][0]), countof(FONT_LOWER[character - 'a']), color, doDraw);
+    }
+
+    if (character == 0xC2) {
+      const auto secondCharacter = *(*cPP)++;
+      if (secondCharacter == 0xB0) {
+        return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_DEGREE), countof(FONT_CHAR_DEGREE[0]), countof(FONT_CHAR_DEGREE), color, doDraw);
+      }
+      return printERROR(x, y, color, doDraw);
+    }
+
+    if (character == 0xE2) {
+      const auto secondCharacter = *(*cPP)++;
+      if (secondCharacter == 0x82) {
+        const auto thirdCharacter = *(*cPP)++;
+        if (thirdCharacter == 0xAC) {
+          return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_EURO), countof(FONT_CHAR_EURO[0]), countof(FONT_CHAR_EURO), color, doDraw);
+        }
+        return printERROR(x, y, color, doDraw);
+      }
+      return printERROR(x, y, color, doDraw);
+    }
+
+    if (character == ' ') {
+      x += 3;
+    }
+
+    if (character == '\n') {
+      x = x0;
+      y += 6;
+      return;
+    }
+
+    switch (character) {
+      case '-': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_MINUS), countof(FONT_CHAR_MINUS[0]), countof(FONT_CHAR_MINUS), color, doDraw);
+      case '+': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_PLUS), countof(FONT_CHAR_PLUS[0]), countof(FONT_CHAR_PLUS), color, doDraw);
+      case '_': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_UNDERLINE), countof(FONT_CHAR_UNDERLINE[0]), countof(FONT_CHAR_UNDERLINE), color, doDraw);
+      case '%': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_PERCENT), countof(FONT_CHAR_PERCENT[0]), countof(FONT_CHAR_PERCENT), color, doDraw);
+      case '?': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_QUESTION), countof(FONT_CHAR_QUESTION[0]), countof(FONT_CHAR_QUESTION), color, doDraw);
+      case '!': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_EXCLAMATION), countof(FONT_CHAR_EXCLAMATION[0]), countof(FONT_CHAR_EXCLAMATION), color, doDraw);
+      case '.': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_POINT), countof(FONT_CHAR_POINT[0]), countof(FONT_CHAR_POINT), color, doDraw);
+      case ',': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_COMMA), countof(FONT_CHAR_COMMA[0]), countof(FONT_CHAR_COMMA), color, doDraw);
+      case ';': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_SEMICOLON), countof(FONT_CHAR_SEMICOLON[0]), countof(FONT_CHAR_SEMICOLON), color, doDraw);
+      case ':': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_COLON), countof(FONT_CHAR_COLON[0]), countof(FONT_CHAR_COLON), color, doDraw);
+      case '#': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_SHARP), countof(FONT_CHAR_SHARP[0]), countof(FONT_CHAR_SHARP), color, doDraw);
+      case '~': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_TILDE), countof(FONT_CHAR_TILDE[0]), countof(FONT_CHAR_TILDE), color, doDraw);
+      case '*': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_ASTERISK), countof(FONT_CHAR_ASTERISK[0]), countof(FONT_CHAR_ASTERISK), color, doDraw);
+      case '"': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_QUOTE_DOUBLE), countof(FONT_CHAR_QUOTE_DOUBLE[0]), countof(FONT_CHAR_QUOTE_DOUBLE), color, doDraw);
+      case '\'': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_QUOTE_SINGLE), countof(FONT_CHAR_QUOTE_SINGLE[0]), countof(FONT_CHAR_QUOTE_SINGLE), color, doDraw);
+      case '=': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_EQUALS), countof(FONT_CHAR_EQUALS[0]), countof(FONT_CHAR_EQUALS), color, doDraw);
+      case '(': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_PAR_L), countof(FONT_CHAR_PAR_L[0]), countof(FONT_CHAR_PAR_L), color, doDraw);
+      case ')': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_PAR_R), countof(FONT_CHAR_PAR_R[0]), countof(FONT_CHAR_PAR_R), color, doDraw);
+      case '[': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_BRACKET_L), countof(FONT_CHAR_BRACKET_L[0]), countof(FONT_CHAR_BRACKET_L), color, doDraw);
+      case ']': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_BRACKET_R), countof(FONT_CHAR_BRACKET_R[0]), countof(FONT_CHAR_BRACKET_R), color, doDraw);
+      case '{': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_CURL_L), countof(FONT_CHAR_CURL_L[0]), countof(FONT_CHAR_CURL_L), color, doDraw);
+      case '}': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_CURL_R), countof(FONT_CHAR_CURL_R[0]), countof(FONT_CHAR_CURL_R), color, doDraw);
+      case '/': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_SLASH), countof(FONT_CHAR_SLASH[0]), countof(FONT_CHAR_SLASH), color, doDraw);
+      case '\\': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_BACKSLASH), countof(FONT_CHAR_BACKSLASH[0]), countof(FONT_CHAR_BACKSLASH), color, doDraw);
+      case '&': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_AND), countof(FONT_CHAR_AND[0]), countof(FONT_CHAR_AND), color, doDraw);
+      case '|': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_PIPE), countof(FONT_CHAR_PIPE[0]), countof(FONT_CHAR_PIPE), color, doDraw);
+      case '$': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_DOLLAR), countof(FONT_CHAR_DOLLAR[0]), countof(FONT_CHAR_DOLLAR), color, doDraw);
+      case '@': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_AT), countof(FONT_CHAR_AT[0]), countof(FONT_CHAR_AT), color, doDraw);
+      case '<': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_LT), countof(FONT_CHAR_LT[0]), countof(FONT_CHAR_LT), color, doDraw);
+      case '>': return print(x, y, reinterpret_cast<bool *>(FONT_CHAR_GT), countof(FONT_CHAR_GT[0]), countof(FONT_CHAR_GT), color, doDraw);
+      default: return printERROR(x, y, color, doDraw);
+    }
+  }
+
+  void print(int& x0, const int& y0, const bool *s, const int w, const int h, const RGBA color, const bool doDraw) {
+    auto maxWidth = 0;
+    for (auto y = 0; y < h; y++) {
+      for (auto x = 0; x < w; x++) {
+        const auto symbolIndex = y * w + x;
+        const auto active = *(s + symbolIndex);
+        if (active) {
+          maxWidth = max(x + 1, maxWidth);
+          const auto pixelX = x0 + x;
+          const auto pixelY = y0 + y;
+          if (doDraw) {
+            setPixel(pixelX, pixelY, color);
+          }
+        }
+      }
+    }
+    x0 += maxWidth;
+  }
+
+  void print(int& x0, const int& y0, const RGBA *s, const int w, const int h) {
+    for (auto y = 0; y < h; y++) {
+      for (auto x = 0; x < w; x++) {
+        const auto symbolIndex = y * w + x;
+        const auto color = *(s + symbolIndex);
+        const auto pixelX = x0 + x;
+        const auto pixelY = y0 + y;
+        setPixel(pixelX, pixelY, color);
+      }
+    }
+    x0 += w;
+  }
+
+  void printERROR(int& x, const int& y, const RGBA color, const bool doDraw) {
+    return print(x, y, reinterpret_cast<bool *>(FONT_ERROR_), countof(FONT_ERROR_[0]), countof(FONT_ERROR_), color, doDraw);
+  }
+
+};
+
+#endif

src/patrix/display/DisplayMatrix.h

@@ -1,103 +1,32 @@
 #ifndef DISPLAY_MATRIX_H
 #define DISPLAY_MATRIX_H
 
-#include <Adafruit_NeoPixel.h>
+#include "Display.h"
-
-#include "DisplayMatrix_FontCommon.h"
 
 template<int W, int H>
-class DisplayMatrix {
+class DisplayMatrix final : public Display {
-
-  Adafruit_NeoPixel leds;
 
   RGB matrix[H][W] = {};
 
-  bool dirty = true;
+protected:
+
+  RGB _read_pixel_(int x, int y) override {
+    return matrix[y][x];
+  }
+
+  void _write_pixel_(const int x, const int y, const RGBA color) override {
+    matrix[y][x] = color;
+  }
 
 public:
 
-  RGBA foreground = White;
+  explicit DisplayMatrix(const int16_t pin)
-
+    : Display(pin, W, H) {
-  RGBA background = Transparent;
-
-  uint8_t brightness = 10;
-
-  uint8_t alpha = 255;
-
-  int cursorX = 0;
-
-  int cursorY = 0;
-
-  // basic ----------------------------------------------------------------------------------------
-
-  explicit DisplayMatrix(const int pin): leds(W * H, pin) {
     //
   }
 
-  void setup() {
+  ~DisplayMatrix() override = default;
-    leds.begin();
-    leds.setBrightness(brightness);
-    clear();
-  }
-
-  void loop() {
-    if (dirty) {
-      for (auto y = 0; y < H; y++) {
-        for (auto x = 0; x < W; x++) {
-          auto rgb = matrix[y][x];
-          leds.setPixelColor(y * W + x, rgb.r, rgb.g, rgb.b);
-        }
-      }
-      leds.show();
-      dirty = false;
-    }
-  }
-
-  void setBrightness(const uint8_t brightness) {
-    if (leds.getBrightness() != brightness) {
-      leds.setBrightness(brightness);
-      dirty = true;
-    }
-  }
-
-  // draw -----------------------------------------------------------------------------------------
-
-  void clear();
-
-  void fillRect(int w = W, int h = H);
-
-  void drawLine(int w, int h, int thickness = 1);
-
-  // print ----------------------------------------------------------------------------------------
-
-  void printf(const char *format, ...);
-
-  void print(const char *str);
-
-  void print(const char **cPP);
-
-  void print(Symbol1 s);
-
-  void print(Symbol2 s);
-
-  void print(Symbol3 s);
-
-  void print(Symbol4 s);
-
-  void print(Symbol5 s);
-
-  void print(bool **s, size_t w, size_t h);
-
-  void print(SymbolRGBA8x8 s);
-
-  void print(RGBA **s, size_t w, size_t h);
 
 };
 
-// ReSharper disable once CppUnusedIncludeDirective
-#include <patrix/display/DisplayMatrix_draw.h>
-
-// ReSharper disable once CppUnusedIncludeDirective
-#include <patrix/display/DisplayMatrix_print.h>
-
 #endif

src/patrix/display/DisplayMatrix_FontLower.cpp

@@ -83,7 +83,7 @@ Symbol5 FONT_LOWER[] = {
     {X,_,_,_,_},
     {X,_,_,_,_},
     {X,_,_,_,_},
-    {_,X,_,_,_},
+    {X,X,_,_,_},
   },
   {
     {_,_,_,_,_},

src/patrix/display/DisplayMatrix_FontNumber.cpp

@@ -1,74 +0,0 @@
-#include "DisplayMatrix_FontNumber.h"
-
-Symbol4 FONT_NUMBER[] = {
-  {
-    {_,X,X,_},
-    {X,_,_,X},
-    {X,_,_,X},
-    {X,_,_,X},
-    {_,X,X,_},
-  },
-  {
-    {_,_,X,_},
-    {_,X,X,_},
-    {X,_,X,_},
-    {_,_,X,_},
-    {_,_,X,_},
-  },
-  {
-    {_,X,X,_},
-    {X,_,_,X},
-    {_,_,X,_},
-    {_,X,_,_},
-    {X,X,X,X},
-  },
-  {
-    {_,X,X,_},
-    {X,_,_,X},
-    {_,_,X,_},
-    {X,_,_,X},
-    {_,X,X,_},
-  },
-  {
-    {X,_,_,X},
-    {X,_,_,X},
-    {X,X,X,X},
-    {_,_,_,X},
-    {_,_,_,X},
-  },
-  {
-    {X,X,X,X},
-    {X,_,_,_},
-    {X,X,X,_},
-    {_,_,_,X},
-    {X,X,X,_},
-  },
-  {
-    {_,X,X,_},
-    {X,_,_,_},
-    {X,X,X,_},
-    {X,_,_,X},
-    {_,X,X,_},
-  },
-  {
-    {X,X,X,X},
-    {_,_,_,X},
-    {_,_,X,_},
-    {_,X,_,_},
-    {X,_,_,_},
-  },
-  {
-    {_,X,X,_},
-    {X,_,_,X},
-    {_,X,X,_},
-    {X,_,_,X},
-    {_,X,X,_},
-  },
-  {
-    {_,X,X,_},
-    {X,_,_,X},
-    {_,X,X,X},
-    {_,_,_,X},
-    {_,X,X,_},
-  },
-};

src/patrix/display/DisplayMatrix_FontNumber.h

@@ -1,8 +0,0 @@
-#ifndef DISPLAY_MATRIX_FONT_NUMBER_H
-#define DISPLAY_MATRIX_FONT_NUMBER_H
-
-#include "DisplayMatrix_FontCommon.h"
-
-extern Symbol4 FONT_NUMBER[];
-
-#endif

src/patrix/display/DisplayMatrix_FontNumberSegments.cpp

@@ -0,0 +1,74 @@
+#include "DisplayMatrix_FontCommon.h"
+
+Symbol4 FONT_NUMBER_SEGMENTS[] = {
+  {
+    {X,X,X},
+    {X,_,X},
+    {X,_,X},
+    {X,_,X},
+    {X,X,X},
+  },
+  {
+    {_,_,X},
+    {_,X,X},
+    {X,_,X},
+    {_,_,X},
+    {_,_,X},
+  },
+  {
+    {X,X,X},
+    {_,_,X},
+    {X,X,X},
+    {X,_,_},
+    {X,X,X},
+  },
+  {
+    {X,X,X},
+    {_,_,X},
+    {_,X,X},
+    {_,_,X},
+    {X,X,X},
+  },
+  {
+    {X,_,X},
+    {X,_,X},
+    {X,X,X},
+    {_,_,X},
+    {_,_,X},
+  },
+  {
+    {X,X,X},
+    {X,_,_},
+    {X,X,X},
+    {_,_,X},
+    {X,X,X},
+  },
+  {
+    {X,X,X},
+    {X,_,_},
+    {X,X,X},
+    {X,_,X},
+    {X,X,X},
+  },
+  {
+    {X,X,X},
+    {_,_,X},
+    {_,_,X},
+    {_,_,X},
+    {_,_,X},
+  },
+  {
+    {X,X,X},
+    {X,_,X},
+    {X,X,X},
+    {X,_,X},
+    {X,X,X},
+  },
+  {
+    {X,X,X},
+    {X,_,X},
+    {X,X,X},
+    {_,_,X},
+    {X,X,X},
+  },
+};

src/patrix/display/DisplayMatrix_FontNumberSegments.h

@@ -0,0 +1,8 @@
+#ifndef DISPLAY_MATRIX_FONT_NUMBER_SEGMENTS_H
+#define DISPLAY_MATRIX_FONT_NUMBER_SEGMENTS_H
+
+#include "DisplayMatrix_FontCommon.h"
+
+extern Symbol4 FONT_NUMBER_SEGMENTS[];
+
+#endif

src/patrix/display/DisplayMatrix_FontSpecial.cpp

@@ -1,13 +1,5 @@
 #include "DisplayMatrix_FontSpecial.h"
 
-Symbol3 FONT_CHAR_SPACE = {
-  {_,_,_},
-  {_,_,_},
-  {_,_,_},
-  {_,_,_},
-  {_,_,_},
-};
-
 Symbol3 FONT_CHAR_MINUS = {
   {_,_,_},
   {_,_,_},
@@ -237,11 +229,11 @@ Symbol4 FONT_ERROR_ = {
 };
 
 Symbol5 FONT_CHAR_PERCENT = {
-  {X,_,_,_,X},
+  {X,_,_},
-  {_,_,_,X,_},
+  {_,_,X},
-  {_,_,X,_,_},
+  {_,X,_},
-  {_,X,_,_,_},
+  {X,_,_},
-  {X,_,_,_,X},
+  {_,_,X},
 };
 
 //@formatter:off

src/patrix/display/DisplayMatrix_FontSpecial.h

@@ -3,7 +3,6 @@
 
 #include "DisplayMatrix_FontCommon.h"
 
-extern Symbol3 FONT_CHAR_SPACE;
 extern Symbol3 FONT_CHAR_MINUS;
 extern Symbol3 FONT_CHAR_PLUS;
 extern Symbol3 FONT_CHAR_UNDERLINE;

src/patrix/display/DisplayMatrix_FontUpper.cpp

@@ -2,11 +2,11 @@
 
 Symbol5 FONT_UPPER[] = {
   {
-    {_,_,X,_,_},
+    {_,X,X,_,_},
-    {_,X,_,X,_},
+    {X,_,_,X,_},
-    {X,_,_,_,X},
+    {X,X,X,X,_},
-    {X,X,X,X,X},
+    {X,_,_,X,_},
-    {X,_,_,_,X},
+    {X,_,_,X,_},
   },
   {
     {X,X,X,_,_},
@@ -44,11 +44,11 @@ Symbol5 FONT_UPPER[] = {
     {X,_,_,_,_},
   },
   {
-    {_,X,X,X,_},
+    {_,X,X,_,_},
     {X,_,_,_,_},
-    {X,_,X,X,X},
+    {X,_,X,X,_},
-    {X,_,_,_,X},
+    {X,_,_,X,_},
-    {_,X,X,X,_},
+    {_,X,X,_,_},
   },
   {
     {X,_,_,X,_},
@@ -100,11 +100,11 @@ Symbol5 FONT_UPPER[] = {
     {X,_,_,_,X},
   },
   {
-    {_,X,X,X,_},
+    {_,X,X,_,_},
-    {X,_,_,_,X},
+    {X,_,_,X,_},
-    {X,_,_,_,X},
+    {X,_,_,X,_},
-    {X,_,_,_,X},
+    {X,_,_,X,_},
-    {_,X,X,X,_},
+    {_,X,X,_,_},
   },
   {
     {X,X,X,_,_},
@@ -114,11 +114,11 @@ Symbol5 FONT_UPPER[] = {
     {X,_,_,_,_},
   },
   {
-    {_,X,X,X,_},
+    {_,X,X,_,_},
-    {X,_,_,_,X},
-    {X,_,X,_,X},
     {X,_,_,X,_},
-    {_,X,X,_,X},
+    {X,_,_,X,_},
+    {X,_,X,_,_},
+    {_,X,_,X,_},
   },
   {
     {X,X,X,_,_},
@@ -135,23 +135,23 @@ Symbol5 FONT_UPPER[] = {
     {X,X,X,_,_},
   },
   {
-    {X,X,X,X,X},
+    {X,X,X,_,_},
-    {_,_,X,_,_},
+    {_,X,_,_,_},
-    {_,_,X,_,_},
+    {_,X,_,_,_},
-    {_,_,X,_,_},
+    {_,X,_,_,_},
-    {_,_,X,_,_},
+    {_,X,_,_,_},
+  },
+  {
+    {X,_,_,X,_},
+    {X,_,_,X,_},
+    {X,_,_,X,_},
+    {X,_,_,X,_},
+    {_,X,X,_,_},
   },
   {
     {X,_,_,_,X},
     {X,_,_,_,X},
     {X,_,_,_,X},
-    {X,_,_,_,X},
-    {_,X,X,X,_},
-  },
-  {
-    {X,_,_,_,X},
-    {X,_,_,_,X},
-    {_,X,_,X,_},
     {_,X,_,X,_},
     {_,_,X,_,_},
   },

src/patrix/display/DisplayMatrix_common.cpp

@@ -1,14 +1,18 @@
 #include "DisplayMatrix_common.h"
 
-//@formatter:off
+// ReSharper disable CppVariableCanBeMadeConstexpr
+// @formatter:off
 const RGBA Transparent {  0,   0,   0,   0};
 const RGBA Black       {  0,   0,   0, 255};
 const RGBA Red         {255,   0,   0, 255};
 const RGBA Yellow      {255, 255,   0, 255};
+const RGBA Orange      {255, 127,   0, 255};
 const RGBA Green       {  0, 255,   0, 255};
 const RGBA Cyan        {  0, 255, 255, 255};
 const RGBA Blue        {  0,   0, 255, 255};
 const RGBA Magenta     {255,   0, 255, 255};
+const RGBA Violet      {192,   0, 255, 255};
 const RGBA Gray        {127, 127, 127, 255};
 const RGBA White       {255, 255, 255, 255};
-//@formatter:on
+// @formatter:on
+// ReSharper restore CppVariableCanBeMadeConstexpr

src/patrix/display/DisplayMatrix_common.h

@@ -13,6 +13,38 @@ struct RGBA {
   uint8_t g;
   uint8_t b;
   uint8_t a;
+
+  static RGBA gray(const uint8_t brightness) {
+    return gray(brightness, 255);
+  }
+
+  static RGBA gray(const uint8_t brightness, const uint8_t alpha) {
+    return {brightness, brightness, brightness, alpha};
+  }
+
+  static RGBA rnd() {
+    return rnd(255);
+  }
+
+  static RGBA rnd(const uint8_t alpha) {
+    return {static_cast<uint8_t>(random(255)), static_cast<uint8_t>(random(255)), static_cast<uint8_t>(random(255)), alpha};
+  }
+
+  RGBA factor(const double factor) const {
+    return {
+      limit(r * factor),
+      limit(g * factor),
+      limit(b * factor),
+      a
+    };
+  }
+
+protected:
+
+  static uint8_t limit(const double newValue) {
+    return static_cast<uint8_t>(round(max(0.0, min(255.0, newValue))));
+  }
+
 };
 
 struct RGB {
@@ -20,18 +52,26 @@ struct RGB {
   uint8_t g;
   uint8_t b;
 
-  void operator =(const RGBA& color) {
+  RGB &operator =(const RGBA& color) {
-    blend(&this->r, color.r, color.a);
+    r = color.r;
-    blend(&this->g, color.g, color.a);
+    g = color.g;
-    blend(&this->b, color.b, color.a);
+    b = color.b;
+    // blend(&this->r, color.r, color.a);
+    // blend(&this->g, color.g, color.a);
+    // blend(&this->b, color.b, color.a);
+    return *this;
   }
 
-private:
+protected:
+
+  static uint8_t limit(const double newValue) {
+    return static_cast<uint8_t>(round(max(0.0, min(255.0, newValue))));
+  }
 
   static void blend(uint8_t *target, const uint8_t color, const uint8_t alpha) {
     const auto factor = alpha / 255.0;
     const auto newValue = (*target * (1 - factor) + color * factor) / 2.0;
-    *target = static_cast<uint8_t>(round(max(0.0, min(255.0, newValue))));
+    *target = limit(newValue);
   }
 
 };
@@ -40,10 +80,12 @@ extern const RGBA Transparent;
 extern const RGBA Black;
 extern const RGBA Red;
 extern const RGBA Yellow;
+extern const RGBA Orange;
 extern const RGBA Green;
 extern const RGBA Cyan;
 extern const RGBA Blue;
 extern const RGBA Magenta;
+extern const RGBA Violet;
 extern const RGBA Gray;
 extern const RGBA White;
 

src/patrix/display/DisplayMatrix_draw.h

@@ -1,52 +0,0 @@
-#ifndef DISPLAY_MATRIX_DRAW_H
-#define DISPLAY_MATRIX_DRAW_H
-
-template<int W, int H>
-void DisplayMatrix<W, H>::clear() {
-  const auto backup = foreground;
-  foreground = Black;
-  fillRect();
-  foreground = backup;
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::fillRect(const int w, const int h) {
-  if (w < 1 || h < 1) {
-    return;
-  }
-  for (auto y = cursorY; y < cursorY + h; ++y) {
-    for (auto x = cursorX; x < cursorX + w; ++x) {
-      matrix[y][x] = foreground;
-    }
-  }
-  dirty = true;
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::drawLine(const int w, const int h, const int thickness) {
-  if (w < 1 && h < 1) {
-    return;
-  }
-  if (w >= h) {
-    const auto m = static_cast<double>(h) / w;
-    for (auto t = 0; t < thickness; ++t) {
-      const auto offset = t % 2 == 0 ? t / 2 : -t / 2;
-      for (auto x = 0; x < w; ++x) {
-        const auto y = static_cast<int>(round(offset + x * m));
-        matrix[cursorY + y][cursorX + x] = foreground;
-      }
-    }
-  } else {
-    const auto m = static_cast<double>(w) / h;
-    for (auto t = 0; t < thickness; ++t) {
-      const auto offset = t % 2 == 0 ? t / 2 : -t / 2;
-      for (auto y = 0; y < w; ++y) {
-        const auto x = static_cast<int>(round(offset + y * m));
-        matrix[cursorY + y][cursorX + x] = foreground;
-      }
-    }
-  }
-  dirty = true;
-}
-
-#endif

src/patrix/display/DisplayMatrix_print.h

@@ -1,154 +0,0 @@
-#ifndef DISPLAYMATRIX_PRINT_H
-#define DISPLAYMATRIX_PRINT_H
-
-#include "DisplayMatrix_FontLower.h"
-#include "DisplayMatrix_FontNumber.h"
-#include "DisplayMatrix_FontSpecial.h"
-#include "DisplayMatrix_FontUpper.h"
-
-template<int W, int H>
-void DisplayMatrix<W, H>::printf(const char *format, ...) {
-  char buffer[64];
-  va_list args;
-  va_start(args, format);
-  vsnprintf(buffer, sizeof buffer, format, args);
-  va_end(args);
-  print(buffer);
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(const char *str) {
-  while (*str != '\0') {
-    print(&str);
-  }
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(const char **cPP) {
-  const auto a = *(*cPP)++;
-  auto b = '\0';
-  auto c = '\0';
-  if ('a' <= a && a <= 'z') {
-    return print(FONT_LOWER[a - 'a']);
-  }
-  if ('A' <= a && a <= 'Z') {
-    return print(FONT_UPPER[a - 'A']);
-  }
-  if ('0' <= a && a <= '9') {
-    return print(FONT_NUMBER[a - '0']);
-  }
-  if (a == 0xC2) {
-    b = *(*cPP)++;
-    switch (b) {
-      case 0xB0: return print(FONT_CHAR_DEGREE);
-      default: return print(FONT_ERROR_);
-    }
-  }
-  if (a == 0xE2) {
-    b = *(*cPP)++;
-    switch (b) {
-      case 0x82:
-        c = *(*cPP)++;
-        switch (c) {
-          case 0xAC: return print(FONT_CHAR_EURO);
-          default: return print(FONT_ERROR_);
-        }
-      default: return print(FONT_ERROR_);
-    }
-  }
-  switch (a) {
-    case ' ': return print(FONT_CHAR_SPACE);
-    case '-': return print(FONT_CHAR_MINUS);
-    case '+': return print(FONT_CHAR_PLUS);
-    case '_': return print(FONT_CHAR_UNDERLINE);
-    case '%': return print(FONT_CHAR_PERCENT);
-    case '?': return print(FONT_CHAR_QUESTION);
-    case '!': return print(FONT_CHAR_EXCLAMATION);
-    case '.': return print(FONT_CHAR_POINT);
-    case ',': return print(FONT_CHAR_COMMA);
-    case ';': return print(FONT_CHAR_SEMICOLON);
-    case ':': return print(FONT_CHAR_COLON);
-    case '#': return print(FONT_CHAR_SHARP);
-    case '~': return print(FONT_CHAR_TILDE);
-    case '*': return print(FONT_CHAR_ASTERISK);
-    case '"': return print(FONT_CHAR_QUOTE_DOUBLE);
-    case '\'': return print(FONT_CHAR_QUOTE_SINGLE);
-    case '=': return print(FONT_CHAR_EQUALS);
-    case '(': return print(FONT_CHAR_PAR_L);
-    case ')': return print(FONT_CHAR_PAR_R);
-    case '[': return print(FONT_CHAR_BRACKET_L);
-    case ']': return print(FONT_CHAR_BRACKET_R);
-    case '{': return print(FONT_CHAR_CURL_L);
-    case '}': return print(FONT_CHAR_CURL_R);
-    case '/': return print(FONT_CHAR_SLASH);
-    case '\\': return print(FONT_CHAR_BACKSLASH);
-    case '&': return print(FONT_CHAR_AND);
-    case '|': return print(FONT_CHAR_PIPE);
-    case '$': return print(FONT_CHAR_DOLLAR);
-    case '@': return print(FONT_CHAR_AT);
-    case '<': return print(FONT_CHAR_LT);
-    case '>': return print(FONT_CHAR_GT);
-    default: return print(FONT_ERROR_);
-
-  }
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(Symbol1 s) {
-  print(reinterpret_cast<bool **>(s),countof(Symbol1),countof(Symbol1[0]));
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(Symbol2 s) {
-  print(reinterpret_cast<bool **>(s),countof(Symbol2),countof(Symbol2[0]));
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(Symbol3 s) {
-  print(reinterpret_cast<bool **>(s),countof(Symbol3),countof(Symbol3[0]));
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(Symbol4 s) {
-  print(reinterpret_cast<bool **>(s),countof(Symbol4),countof(Symbol4[0]));
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(Symbol5 s) {
-  print(reinterpret_cast<bool **>(s),countof(Symbol5),countof(Symbol5[0]));
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(bool **s, const size_t w, const size_t h) {
-  auto xMax = 0;
-  for (auto y = 0; y < h; y++) {
-    for (auto x = 0; x < w; x++) {
-      const auto c = s[y][x];
-      if (c) {
-        matrix[y][x] = foreground;
-        xMax = x > xMax ? x : xMax;
-      } else {
-        matrix[y][x] = background;
-      }
-    }
-  }
-  cursorX += xMax;
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(SymbolRGBA8x8 s) {
-  print(reinterpret_cast<RGBA **>(s),countof(SymbolRGBA8x8),countof(SymbolRGBA8x8[0]));
-}
-
-template<int W, int H>
-void DisplayMatrix<W, H>::print(RGBA **s, const size_t w, const size_t h) {
-  for (auto y = 0; y < h; y++) {
-    for (auto x = 0; x < w; x++) {
-      const auto color = s[y][x];
-      matrix[y][x] = color;
-    }
-  }
-  cursorX += w;
-}
-
-#endif

src/patrix/node/PatrixNode.cpp

@@ -1,4 +1,4 @@
 #include <patrix/node/PatrixNode.h>
 
 // ReSharper disable once CppUseAuto
-PatrixNode patrixNode = patrixGetNode();
+PatrixNode &patrixNode = patrixGetNode();

src/patrix/node/PatrixNode.h

@@ -22,16 +22,18 @@ public:
 
   virtual ~PatrixNode() = default;
 
-  virtual void setup() {}
+  virtual void setup() = 0;
 
-  virtual void loop() {}
+  virtual void loop() = 0;
+
+  virtual void mqttMessage(char *topic, char *message) {}
 
   virtual void websocketEvent(AsyncWebSocket *socket, AsyncWebSocketClient *client, AwsEventType type, void *arg, unsigned char *message, unsigned length) {}
 
 };
 
-extern PatrixNode patrixNode;
+extern PatrixNode& patrixNode;
 
-PatrixNode& patrixGetNode();
+PatrixNode &patrixGetNode();
 
 #endif