Dib and Shader support (#158)

src/internal/NeoDib.h

@@ -0,0 +1,108 @@
+/*-------------------------------------------------------------------------
+NeoPixel library
+
+Written by Michael C. Miller.
+
+I invest time and resources providing this open source code,
+please support me by dontating (see https://github.com/Makuna/NeoPixelBus)
+
+-------------------------------------------------------------------------
+This file is part of the Makuna/NeoPixelBus library.
+
+NeoPixelBus is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as
+published by the Free Software Foundation, either version 3 of
+the License, or (at your option) any later version.
+
+NeoPixelBus is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with NeoPixel.  If not, see
+<http://www.gnu.org/licenses/>.
+-------------------------------------------------------------------------*/
+#pragma once
+
+template<typename T_COLOR_OBJECT> class NeoDib
+{
+public:
+    NeoDib(uint16_t countPixels) :
+        _countPixels(countPixels)
+    {
+        _pixels = (T_COLOR_OBJECT*)malloc(PixelsSize());
+    }
+
+    ~NeoDib()
+    {
+        free((uint8_t*)_pixels);
+    }
+
+    T_COLOR_OBJECT* Pixels() const
+    {
+        return _pixels;
+    };
+
+    uint16_t PixelCount() const
+    {
+        return _countPixels;
+    };
+
+    size_t PixelsSize() const
+    {
+        return _countPixels * PixelSize();
+    };
+
+    size_t PixelSize() const
+    {
+        return sizeof(T_COLOR_OBJECT);
+    };
+
+    void SetPixelColor(
+        uint16_t indexPixel,
+        T_COLOR_OBJECT color)
+    {
+        if (indexPixel < PixelCount())
+        {
+            _pixels[indexPixel] = color;
+        }
+    };
+
+    T_COLOR_OBJECT GetPixelColor(
+        uint16_t indexPixel) const
+    {
+        if (indexPixel >= PixelCount())
+        {
+            return 0;
+        }
+        return _pixels[indexPixel];
+    };
+
+    void ClearTo(T_COLOR_OBJECT color)
+    {
+        for (uint16_t pixel = 0; pixel < PixelCount(); pixel++)
+        {
+            _pixels[pixel] = color;
+        }
+    };
+
+    template <typename T_COLOR_FEATURE, typename T_SHADER> void Render(NeoBufferContext<T_COLOR_FEATURE> destBuffer, T_SHADER shader)
+    {
+        uint16_t countPixels = destBuffer.PixelCount();
+        if (countPixels > _countPixels)
+        {
+            countPixels = _countPixels;
+        }
+
+        for (uint16_t indexPixel = 0; indexPixel < countPixels; indexPixel++)
+        {
+            T_COLOR_OBJECT color = shader.Apply(indexPixel, _pixels[indexPixel]);
+            T_COLOR_FEATURE::applyPixelColor(destBuffer.Pixels, indexPixel, color);
+        }
+    }
+
+private:
+    const uint16_t _countPixels; // Number of RGB LEDs in strip
+    T_COLOR_OBJECT* _pixels;
+};