UwUGL/primatives/rectangle.cpp

#pragma once

#include <stdint.h>

#include "../datatypes.cpp"
#include "../helpers.cpp"
#include "../buffer.cpp"
#include "../shaders/shader.cpp"
// #include "../shaders/colorshader.cpp"
// #include "../shaders/gradientshader.cpp"
// #include "../shaders/hgradientshader.cpp"
// #include "../shaders/vgradientshader.cpp"
// #include "../mapper.cpp"

namespace UwU {
  // rectangle
  class Rectangle {
    public:
      Rectangle(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) {
        this->x0 = x0;
        this->y0 = y0;
        this->x1 = x1;
        this->y1 = y1;
      }
      Rectangle() {}
      uint16_t x0;
      uint16_t y0;
      uint16_t x1;
      uint16_t y1;
      
      // Draw a rectangle
      void draw (Buffer buffer, Shader shader) {
        if (shader.shaderType == COLOR) {
          if (x0 > buffer.width || y0 > buffer.height || x1 > buffer.width || y1 > buffer.height) {return;};
          Color c = shader.c0;
          uint8_t r = c.r;
          uint8_t g = c.g;
          uint8_t b = c.b;
          size_t stride = buffer.stride;
          size_t i = (size_t)y0 * buffer.stride + (size_t)x0 * 4;
          for (uint16_t y = y0; y < y1; y++) {
            for (uint16_t x = x0; x < x1; x++) {
              // buffer.drawPixel(Coord2(x, y), shader.c0);
              buffer.pixels[i + 0] = b;
              buffer.pixels[i + 1] = g;
              buffer.pixels[i + 2] = r;
              buffer.pixels[i + 3] = 255;
              i += 4;
            }
            i += stride - ((x1 - x0) * 4);
          }
          return;

        } else if (shader.shaderType == HGRADIENT) {
          if (x0 > buffer.width || y0 > buffer.height || x1 > buffer.width || y1 > buffer.height) {return;};
          Color cols[x1 - x0];
          for (uint16_t x = x0; x < x1; x++) {
            cols[x - x0] = ShaderMethods::gradient(shader.u0, shader.scale, shader.c0, shader.c1, x);
          }
          for (uint16_t y = y0; y < y1; y++) {
            for (uint16_t x = x0; x < x1; x++) {
            buffer.drawPixel(Coord2(x, y), cols[x - x0]);
            }
          }
          return;
          
        } else if (shader.shaderType == VGRADIENT) {
          if (x0 > buffer.width || y0 > buffer.height || x1 > buffer.width || y1 > buffer.height) {return;};
          for (uint16_t y = y0; y < y1; y++) {
            Color c = ShaderMethods::gradient(shader.v0, shader.scale, shader.c0, shader.c1, y);
            for (uint16_t x = x0; x < x1; x++) {
              buffer.drawPixel(Coord2(x, y), c);
            }
          }
          return;
        }
          
      }
  };
}