implemented shaders, gradients, and uv mapping

datatypes.cpp

@@ -36,22 +36,38 @@ namespace UwU {
     uint16_t y;
   };
 
-  // // trapezoid datatype (horizontally constrained)
-  // struct Trapezoid {
-  //   Trapezoid(uint16_t y0, uint16_t y1, uint16_t xl0, uint16_t xl1, uint16_t xr0, uint16_t xr1) {
-  //     this->y0 = y0;
-  //     this->y1 = y1;
-  //     this->xl0 = xl0;
-  //     this->xl1 = xl1;
-  //     this->xr0 = xr0;
-  //     this->xr1 = xr1;
+  // Vec2 datatype for signed x, y coordinates
+  struct Vec2 {
+    Vec2(int16_t x, int16_t y) {
+      this->x = x;
+      this->y = y;
+    }
+    Vec2() {}
+    int16_t x;
+    int16_t y;
+  };
+
+  // 2x2 matrix, Q15.16 signed fixed point
+  struct Matrix4 {
+    Matrix4(int32_t xx, int32_t xy, int32_t yx, int32_t yy) {
+      this->xx = xx;
+      this->xy = xy;
+      this->yx = yx;
+      this->yy = yy;
+    }
+    Matrix4() {}
+    int32_t xx;  // x' = x*xx + y*xy
+    int32_t xy;
+    int32_t yx;  // y' = x*yx + y*yy
+    int32_t yy;
+  };
+
+  // class Mapper {
+  //   public:
+  //   Mapper() {
+
   //   }
-  //   Trapezoid() {}
-  //   uint16_t y0;
-  //   uint16_t y1;
-  //   uint16_t xl0;
-  //   uint16_t xl1;
-  //   uint16_t xr0;
-  //   uint16_t xr1;
+  //   uint16_t *xxMap;
+
   // };
 }