added missing files

buffer.cpp

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <stdint.h>
+
+#include "datatypes.cpp"
+#include "helpers.cpp"
+
+namespace UwU {
+      // Buffer object - can be a wayland surface or a virtual buffer
+  class Buffer {
+    public:
+        Buffer(uint16_t width, uint16_t height) {
+        uint8_t pixels[width * height * 4];
+        this->pixels = pixels;
+        this->width = width;
+        this->height = height;
+        this->stride = width * 4;
+        }
+        // Buffer(uint8_t* pixels, uint16_t width, uint16_t height, uint16_t stride) {
+        //   this->pixels = pixels;
+        //   this->width = width;
+        //   this->height = height;
+        //   this->stride = stride;
+        // }
+        Buffer() {}
+        uint8_t* pixels;
+        uint16_t width;
+        uint16_t height;
+        uint16_t stride;
+
+        void drawPixel(Coord2 coord, Color color) {
+            size_t i = (size_t)coord.y * stride + (size_t)coord.x * 4;
+            uint8_t b0 = pixels[i + 0];
+            uint8_t g0 = pixels[i + 1];
+            uint8_t r0 = pixels[i + 2];
+            uint8_t b = Helpers::lerp8(b0, color.b, color.a);
+            uint8_t g = Helpers::lerp8(g0, color.g, color.a);
+            uint8_t r = Helpers::lerp8(r0, color.r, color.a);
+            pixels[i + 0] = b;    // B
+            pixels[i + 1] = g;    // G
+            pixels[i + 2] = r;    // R
+            pixels[i + 3] = 0xff; // A
+            return;
+        }
+  };
+}