Update NeoEsp32RmtMethod.h

src/internal/methods/NeoEsp32RmtMethod.h

@@ -565,15 +565,17 @@ public:
     typedef NeoNoSettings SettingsObject;
 
     NeoEsp32RmtMethodBase(uint8_t pin, uint16_t pixelCount, size_t elementSize, size_t settingsSize)  :
-        _sizeData(pixelCount * elementSize + settingsSize),
-        _pin(pin)
+        _pin(pin),
+        _sizeData(pixelCount* elementSize + settingsSize),
+        _pixelCount(pixelCount)
     {
         construct();
     }
 
     NeoEsp32RmtMethodBase(uint8_t pin, uint16_t pixelCount, size_t elementSize, size_t settingsSize, NeoBusChannel channel) :
-        _sizeData(pixelCount* elementSize + settingsSize),
         _pin(pin),
+        _sizeData(pixelCount* elementSize + settingsSize),
+        _pixelCount(pixelCount),
         _channel(channel)
     {
         construct();
@@ -590,7 +592,6 @@ public:
         gpio_matrix_out(_pin, SIG_GPIO_OUT_IDX, false, false);
         pinMode(_pin, INPUT);
 
-        free(_dataEditing);
         free(_dataSending);
     }
 
@@ -623,67 +624,93 @@ public:
         ESP_ERROR_CHECK(rmt_translator_init(_channel.RmtChannelNumber, T_SPEED::Translate));
     }
 
-    void Update(bool maintainBufferConsistency)
+    template <typename T_COLOR_OBJECT,
+        typename T_COLOR_FEATURE,
+        typename T_SHADER>
+    void Update(
+        T_COLOR_OBJECT* pixels,
+        size_t countPixels,
+        const typename T_COLOR_FEATURE::SettingsObject& featureSettings,
+        const T_SHADER& shader)
     {
         // wait for not actively sending data
         // this will time out at 10 seconds, an arbitrarily long period of time
         // and do nothing if this happens
         if (ESP_OK == ESP_ERROR_CHECK_WITHOUT_ABORT(rmt_wait_tx_done(_channel.RmtChannelNumber, 10000 / portTICK_PERIOD_MS)))
         {
-            // now start the RMT transmit with the editing buffer before we swap
-            ESP_ERROR_CHECK_WITHOUT_ABORT(rmt_write_sample(_channel.RmtChannelNumber, _dataEditing, _sizeData, false));
+            // fill buffer
+            const size_t sendDataSize = T_COLOR_FEATURE::SettingsSize >= T_COLOR_FEATURE::PixelSize ? T_COLOR_FEATURE::SettingsSize : T_COLOR_FEATURE::PixelSize;
+            uint8_t sendData[sendDataSize];
+            uint8_t* data = _dataSending;
 
-            if (maintainBufferConsistency)
+            // if there are settings at the front
+            if (T_COLOR_FEATURE::applyFrontSettings(sendData, sendDataSize, featureSettings))
             {
-                // copy editing to sending,
-                // this maintains the contract that "colors present before will
-                // be the same after", otherwise GetPixelColor will be inconsistent
-                memcpy(_dataSending, _dataEditing, _sizeData);
+                FillBuffer(sendData, T_COLOR_FEATURE::SettingsSize, &data);
             }
 
-            // swap so the user can modify without affecting the async operation
-            std::swap(_dataSending, _dataEditing);
+            // fill primary color data
+            T_COLOR_OBJECT* pixel = pixels;
+            const T_COLOR_OBJECT* pixelEnd = pixel + countPixels;
+            uint16_t stripCount = _pixelCount;
+
+            while (stripCount--)
+            {
+                typename T_COLOR_FEATURE::ColorObject color = shader.Apply(*pixel);
+                T_COLOR_FEATURE::applyPixelColor(sendData, sendDataSize, color);
+
+                FillBuffer(sendData, T_COLOR_FEATURE::PixelSize, &data);
+
+                pixel++;
+                if (pixel >= pixelEnd)
+                {
+                    // restart at first
+                    pixel = pixels;
+                }
+            }
+
+
+            // if there are settings at the back
+            if (T_COLOR_FEATURE::applyBackSettings(sendData, sendDataSize, featureSettings))
+            {
+                FillBuffer(sendData, T_COLOR_FEATURE::SettingsSize, &data);
+            }
+
+            // now start the RMT transmit with the editing buffer before we swap
+            ESP_ERROR_CHECK_WITHOUT_ABORT(rmt_write_sample(_channel.RmtChannelNumber, _dataSending, _sizeData, false));
         }
     }
 
-    bool AlwaysUpdate()
-    {
-        // this method requires update to be called only if changes to buffer
-        return false;
-    }
-
-    uint8_t* getData() const
-    {
-        return _dataEditing;
-    };
-
-    size_t getDataSize() const
-    {
-        return _sizeData;
-    }
-
     void applySettings([[maybe_unused]] const SettingsObject& settings)
     {
     }
 
 private:
-    const size_t  _sizeData;      // Size of '_data*' buffers 
     const uint8_t _pin;            // output pin number
+    const uint16_t _pixelCount; // count of pixels in the strip
+    const size_t  _sizeData;      // Size of '_data*' buffers 
+
     const T_CHANNEL _channel; // holds instance for multi channel support
 
     // Holds data stream which include LED color values and other settings as needed
-    uint8_t*  _dataEditing;   // exposed for get and set
     uint8_t*  _dataSending;   // used for async send using RMT
 
 
     void construct()
     {
-        _dataEditing = static_cast<uint8_t*>(malloc(_sizeData));
-        // data cleared later in Begin()
-
         _dataSending = static_cast<uint8_t*>(malloc(_sizeData));
         // no need to initialize it, it gets overwritten on every send
     }
+
+    void FillBuffer(const uint8_t* sendData, size_t sendDataSize, uint8_t** buffer)
+    {
+        const uint8_t* pEnd = sendData + sendDataSize;
+
+        while (sendData < pEnd)
+        {
+            *(*buffer)++ = *sendData++;
+        }
+    }
 };
 
 // normal