function
void draw_triangle_nearest_a(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
                           Vec4 p0,   Vec4 p1,   Vec4 p2,
                           Vec2 tex0, Vec2 tex1, Vec2 tex2,
                           Vec3 norm0, Vec3 norm1, Vec3 norm2) {
  F32 min_x1 = (F32)(min(p0.x, min(p1.x, p2.x)));
  F32 min_y1 = (F32)(min(p0.y, min(p1.y, p2.y)));
  F32 max_x1 = (F32)(max(p0.x, max(p1.x, p2.x)));
  F32 max_y1 = (F32)(max(p0.y, max(p1.y, p2.y)));
  S64 min_x = (S64)max(0.f, floor(min_x1));
  S64 min_y = (S64)max(0.f, floor(min_y1));
  S64 max_x = (S64)min((F32)dst->x, ceil(max_x1));
  S64 max_y = (S64)min((F32)dst->y, ceil(max_y1));

  U32 *destination = dst->pixels + dst->x*min_y;
  F32 area = (p1.y - p0.y) * (p2.x - p0.x) - (p1.x - p0.x) * (p2.y - p0.y);
  for (S64 y = min_y; y < max_y; y++) {
    for (S64 x = min_x; x < max_x; x++) {
      F32 Cx0 = edge_function(p0, p1, { (F32)x,(F32)y });
      F32 Cx1 = edge_function(p1, p2, { (F32)x,(F32)y });
      F32 Cx2 = edge_function(p2, p0, { (F32)x,(F32)y });
      if (Cx0 >= 0 && Cx1 >= 0 && Cx2 >= 0) {
      // ZoneNamedN(fill, "fill_pixel", true);
        F32 w1 = Cx1 / area;
        F32 w2 = Cx2 / area;
        F32 w3 = Cx0 / area;

        // @Note: We could do: interpolated_w = 1.f / interpolated_w to get proper depth
        // but why waste an instruction, the smaller the depth value the farther the object
        F32 interpolated_w = (1.f / p0.w) * w1 + (1.f / p1.w) * w2 + (1.f / p2.w) * w3;
        F32* depth = depth_buffer + (x + y * dst->x);
        if (*depth < interpolated_w) {
          *depth = interpolated_w;
          F32 invw0 = (w1 / p0.w);
          F32 invw1 = (w2 / p1.w);
          F32 invw2 = (w3 / p2.w);

          Vec3 norm = (norm0 * invw0 + norm1 * invw1 + norm2 * invw2) / interpolated_w;
          F32 u = tex0.x * invw0 + tex1.x * invw1 + tex2.x * invw2;
          F32 v = tex0.y * invw0 + tex1.y * invw1 + tex2.y * invw2;
          {
            u /= interpolated_w;
            v /= interpolated_w;
            u = u - floor(u);
            v = v - floor(v);
            u = u * (src->x - 1);
            v = v * (src->y - 1);
          }
          S64 ui = (S64)(u);
          S64 vi = (S64)(v);
          //F32 udiff = u - (F32)ui;
          //F32 vdiff = v - (F32)vi;
          // Origin UV (0,0) is in bottom left
          U32 *dst_pixel = destination + x;
          U32 *pixel = src->pixels + (ui + (src->y - 1ll - vi) * src->x);

          Vec4 result_color; {
            U32 c = *pixel;
            F32 a = ((c & 0xff000000) >> 24) / 255.f;
            F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
            F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
            F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
            r*=r;
            g*=g;
            b*=b;
            result_color = { r,g,b,a };
          }

          Vec4 dst_color; {
            U32 c = *dst_pixel;
            F32 a = ((c & 0xff000000) >> 24) / 255.f;
            F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
            F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
            F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
            r*=r; g*=g; b*=b;
            dst_color = { r,g,b,a };
          }

#if 0
          Vec3 light_color = vec3(0.8,0.8,1);
          constexpr F32 ambient_strength = 0.1f; {
            Vec3 ambient = ambient_strength * light_color;
            Vec3 diffuse = clamp_bot(0.f, -dot(norm, light_direction)) * light_color;
            result_color.rgb *= (ambient+diffuse);
          }
#endif

          result_color = premultiplied_alpha(dst_color, result_color);
          result_color = almost_linear_to_srgb(result_color);
          U32 color32 = vec4_to_u32abgr(result_color);

          *dst_pixel = color32;
        }
      }
    }
    destination += dst->x;
  }
}


function
void draw_triangle_nearest_b(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
                           Vec4 p0,   Vec4 p1,   Vec4 p2,
                           Vec2 tex0, Vec2 tex1, Vec2 tex2,
                           Vec3 norm0, Vec3 norm1, Vec3 norm2) {
  // if(os.frame > 10) PROFILE_BEGIN(draw_triangle);
  // ZoneScopedN("draw_triangle");
  F32 min_x1 = (F32)(min(p0.x, min(p1.x, p2.x)));
  F32 min_y1 = (F32)(min(p0.y, min(p1.y, p2.y)));
  F32 max_x1 = (F32)(max(p0.x, max(p1.x, p2.x)));
  F32 max_y1 = (F32)(max(p0.y, max(p1.y, p2.y)));
  S64 min_x = (S64)max(0.f, floor(min_x1));
  S64 min_y = (S64)max(0.f, floor(min_y1));
  S64 max_x = (S64)min((F32)dst->x, ceil(max_x1));
  S64 max_y = (S64)min((F32)dst->y, ceil(max_y1));

  F32 dy10 = (p1.y - p0.y);
  F32 dy21 = (p2.y - p1.y);
  F32 dy02 = (p0.y - p2.y);

  F32 dx10 = (p1.x - p0.x);
  F32 dx21 = (p2.x - p1.x);
  F32 dx02 = (p0.x - p2.x);

  F32 C0 = dy10 * (p0.x) - dx10 * (p0.y);
  F32 C1 = dy21 * (p1.x) - dx21 * (p1.y);
  F32 C2 = dy02 * (p2.x) - dx02 * (p2.y);

  F32 Cy0 = dy10 * min_x - dx10 * min_y - C0;
  F32 Cy1 = dy21 * min_x - dx21 * min_y - C1;
  F32 Cy2 = dy02 * min_x - dx02 * min_y - C2;

  U32 *destination = dst->pixels + dst->x*min_y;
  F32 area = (p1.y - p0.y) * (p2.x - p0.x) - (p1.x - p0.x) * (p2.y - p0.y);
  U64 fill_pixels_begin = __rdtsc();
  for (S64 y = min_y; y < max_y; y++) {
    F32 Cx0 = Cy0;
    F32 Cx1 = Cy1;
    F32 Cx2 = Cy2;
    for (S64 x = min_x; x < max_x; x++) {
      if (Cx0 >= 0 && Cx1 >= 0 && Cx2 >= 0) {
      // ZoneNamedN(fill, "fill_pixel", true);
        F32 w1 = Cx1 / area;
        F32 w2 = Cx2 / area;
        F32 w3 = Cx0 / area;

        // @Note: We could do: interpolated_w = 1.f / interpolated_w to get proper depth
        // but why waste an instruction, the smaller the depth value the farther the object
        F32 interpolated_w = (1.f / p0.w) * w1 + (1.f / p1.w) * w2 + (1.f / p2.w) * w3;
        F32* depth = depth_buffer + (x + y * dst->x);
        if (*depth < interpolated_w) {
          *depth = interpolated_w;
          F32 invw0 = (w1 / p0.w);
          F32 invw1 = (w2 / p1.w);
          F32 invw2 = (w3 / p2.w);

          Vec3 norm = (norm0 * invw0 + norm1 * invw1 + norm2 * invw2) / interpolated_w;
          F32 u = tex0.x * invw0 + tex1.x * invw1 + tex2.x * invw2;
          F32 v = tex0.y * invw0 + tex1.y * invw1 + tex2.y * invw2;
          {
            u /= interpolated_w;
            v /= interpolated_w;
            u = u - floor(u);
            v = v - floor(v);
            u = u * (src->x - 1);
            v = v * (src->y - 1);
          }
          S64 ui = (S64)(u);
          S64 vi = (S64)(v);
          //F32 udiff = u - (F32)ui;
          //F32 vdiff = v - (F32)vi;
          // Origin UV (0,0) is in bottom left
          U32 *dst_pixel = destination + x;
          U32 *pixel = src->pixels + (ui + (src->y - 1ll - vi) * src->x);

          Vec4 result_color; {
            U32 c = *pixel;
            F32 a = ((c & 0xff000000) >> 24) / 255.f;
            F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
            F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
            F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
            r*=r;
            g*=g;
            b*=b;
            result_color = { r,g,b,a };
          }

          Vec4 dst_color; {
            U32 c = *dst_pixel;
            F32 a = ((c & 0xff000000) >> 24) / 255.f;
            F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
            F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
            F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
            r*=r; g*=g; b*=b;
            dst_color = { r,g,b,a };
          }

#if 0
          Vec3 light_color = vec3(0.8,0.8,1);
          constexpr F32 ambient_strength = 0.1f; {
            Vec3 ambient = ambient_strength * light_color;
            Vec3 diffuse = clamp_bot(0.f, -dot(norm, light_direction)) * light_color;
            result_color.rgb *= (ambient+diffuse);
          }
#endif

          result_color = premultiplied_alpha(dst_color, result_color);
          result_color = almost_linear_to_srgb(result_color);
          U32 color32 = vec4_to_u32abgr(result_color);

          *dst_pixel = color32;
        }
      }
      Cx0 += dy10;
      Cx1 += dy21;
      Cx2 += dy02;
    }
    Cy0 -= dx10;
    Cy1 -= dx21;
    Cy2 -= dx02;
    destination += dst->x;
  }

U64 end_time = __rdtsc();

  filled_pixel_total_time += end_time - fill_pixels_begin;
  filled_pixel_count      += (max_x - min_x)*(max_y - min_y);
     // if(os.frame > 10) PROFILE_END(draw_triangle);
}


function
void draw_triangle_bilinear(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
                            Vec4 p0,   Vec4 p1,   Vec4 p2,
                            Vec2 tex0, Vec2 tex1, Vec2 tex2,
                            Vec3 norm0, Vec3 norm1, Vec3 norm2) {
  F32 min_x1 = (F32)(min(p0.x, min(p1.x, p2.x)));
  F32 min_y1 = (F32)(min(p0.y, min(p1.y, p2.y)));
  F32 max_x1 = (F32)(max(p0.x, max(p1.x, p2.x)));
  F32 max_y1 = (F32)(max(p0.y, max(p1.y, p2.y)));

  S64 min_x = (S64)clamp_bot(0.f, floor(min_x1));
  S64 min_y = (S64)clamp_bot(0.f, floor(min_y1));
  S64 max_x = (S64)clamp_top((F32)dst->x, ceil(max_x1));
  S64 max_y = (S64)clamp_top((F32)dst->y, ceil(max_y1));

  F32 area = edge_function(p0, p1, p2);
  for (S64 y = min_y; y < max_y; y++) {
    for (S64 x = min_x; x < max_x; x++) {
      F32 edge0 = edge_function(p0, p1, { (F32)x,(F32)y });
      F32 edge1 = edge_function(p1, p2, { (F32)x,(F32)y });
      F32 edge2 = edge_function(p2, p0, { (F32)x,(F32)y });

      if (edge0 >= 0 && edge1 >= 0 && edge2 >= 0) {
        F32 w1 = edge1 / area;
        F32 w2 = edge2 / area;
        F32 w3 = edge0 / area;
        F32 interpolated_w = (1.f / p0.w) * w1 + (1.f / p1.w) * w2 + (1.f / p2.w) * w3;

        // @Note: We could do: interpolated_w = 1.f / interpolated_w to get proper depth
        // but why waste an instruction, the smaller the depth value the farther the object
        F32* depth = depth_buffer + (x + y * dst->x);
        if (*depth < interpolated_w) {
          *depth = interpolated_w;
          F32 invw0 = (w1 / p0.w);
          F32 invw1 = (w2 / p1.w);
          F32 invw2 = (w3 / p2.w);

          Vec3 norm = (norm0 * invw0 + norm1 * invw1 + norm2 * invw2) / interpolated_w;
          F32 u = tex0.x * invw0 + tex1.x * invw1 + tex2.x * invw2;
          F32 v = tex0.y * invw0 + tex1.y * invw1 + tex2.y * invw2;
          {
            u /= interpolated_w;
            v /= interpolated_w;
            u = u - floor(u);
            v = v - floor(v);
            u = u * (src->x - 1);
            v = v * (src->y - 1);
          }

          S64 ui = (S64)(u);
          S64 vi = (S64)(v);
          F32 udiff = u - (F32)ui;
          F32 vdiff = v - (F32)vi;
          // Origin UV (0,0) is in bottom left
          U32 *pixel = src->pixels + (ui + (src->y - 1ll - vi) * src->x);
          U32 *dst_pixel = dst->pixels + (x + y * dst->x);

#if 0
          Vec4 result_color = vec4abgr(*pixel);
#else
          Vec4 pixelx1y1 = vec4abgr(*pixel);
          Vec4 pixelx2y1 = vec4abgr(*(pixel + 1));
          Vec4 pixelx1y2 = vec4abgr(*(pixel - src->x));
          Vec4 pixelx2y2 = vec4abgr(*(pixel + 1 - src->x));
          pixelx1y1 = srgb_to_almost_linear(pixelx1y1);
          pixelx2y1 = srgb_to_almost_linear(pixelx2y1);
          pixelx1y2 = srgb_to_almost_linear(pixelx1y2);
          pixelx2y2 = srgb_to_almost_linear(pixelx2y2);
          Vec4 blendx1 = lerp(pixelx1y1, pixelx2y1, udiff);
          Vec4 blendx2 = lerp(pixelx1y2, pixelx2y2, udiff);
          Vec4 result_color = lerp(blendx1, blendx2, vdiff);
#endif

          Vec3 light_color = vec3(0.8,0.8,1);
          constexpr F32 ambient_strength = 0.1f; {
            Vec3 ambient = ambient_strength * light_color;
            Vec3 diffuse = clamp_bot(0.f, -dot(norm, light_direction)) * light_color;
            result_color.rgb *= (ambient+diffuse);
          }

          Vec4 dst_color = vec4abgr(*dst_pixel);
          dst_color = srgb_to_almost_linear(dst_color);
          result_color = premultiplied_alpha(dst_color, result_color);
          result_color = almost_linear_to_srgb(result_color);
          U32 color32 = vec4_to_u32abgr(result_color);

          *dst_pixel = color32;
        }
      }
    }
  }
}

function
void draw_triangle_nearest_c(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
                           Vec4 p0,   Vec4 p1,   Vec4 p2,
                           Vec2 tex0, Vec2 tex1, Vec2 tex2,
                           Vec3 norm0, Vec3 norm1, Vec3 norm2) {
  if(src->pixels == 0) return;

  PROFILE_SCOPE(draw_triangle);
  F32 min_x1 = (F32)(min(p0.x, min(p1.x, p2.x)));
  F32 min_y1 = (F32)(min(p0.y, min(p1.y, p2.y)));
  F32 max_x1 = (F32)(max(p0.x, max(p1.x, p2.x)));
  F32 max_y1 = (F32)(max(p0.y, max(p1.y, p2.y)));

  S64 min_x = (S64)max(0.f, floor(min_x1));
  S64 min_y = (S64)max(0.f, floor(min_y1));
  S64 max_x = (S64)min((F32)dst->x, ceil(max_x1));
  S64 max_y = (S64)min((F32)dst->y, ceil(max_y1));

  if (min_y >= max_y) return;
  if (min_x >= max_x) return;

  F32 dy10 = (p1.y - p0.y);
  F32 dy21 = (p2.y - p1.y);
  F32 dy02 = (p0.y - p2.y);

  F32 dx10 = (p1.x - p0.x);
  F32 dx21 = (p2.x - p1.x);
  F32 dx02 = (p0.x - p2.x);

  F32 C0 = dy10 * (p0.x) - dx10 * (p0.y);
  F32 C1 = dy21 * (p1.x) - dx21 * (p1.y);
  F32 C2 = dy02 * (p2.x) - dx02 * (p2.y);

  F32 Cy0 = dy10 * min_x - dx10 * min_y - C0;
  F32 Cy1 = dy21 * min_x - dx21 * min_y - C1;
  F32 Cy2 = dy02 * min_x - dx02 * min_y - C2;

  Vec8 Cx0;
  Vec8 Cx1;
  Vec8 Cx2;

  Vec8I var07i = vec8i(0,1,2,3,4,5,6,7);
  Vec8 var07 = vec8(0,1,2,3,4,5,6,7);
  Vec8 Dy10 = vec8(dy10) * var07;
  Vec8 Dy21 = vec8(dy21) * var07;
  Vec8 Dy02 = vec8(dy02) * var07;


  U32 *destination = dst->pixels + dst->x*min_y;
  F32 area = (p1.y - p0.y) * (p2.x - p0.x) - (p1.x - p0.x) * (p2.y - p0.y);
  for (S64 y = min_y; y < max_y; y++) {
    Cx0 = vec8(Cy0);
    Cx1 = vec8(Cy1);
    Cx2 = vec8(Cy2);

    for (S64 x8 = min_x; x8 < max_x; x8+=8) {
      PROFILE_SCOPE(fill_triangle_outer);
      Cx0 += Dy10;
      Cx1 += Dy21;
      Cx2 += Dy02;


      Vec8I x = vec8i(x8) + var07i;
      for(S64 i = 0; i < 8; i++){
        // S64 x = x8+i;

        if (Cx0[0] >= 0 && Cx1[0] >= 0 && Cx2[0] >= 0) {
          PROFILE_SCOPE(fill_triangle_inner);
          F32 w1 = Cx1[0] / area;
          F32 w2 = Cx2[0] / area;
          F32 w3 = Cx0[0] / area;

          // @Note: We could do: interpolated_w = 1.f / interpolated_w to get proper depth
          // but why waste an instruction, the smaller the depth value the farther the object
          F32 interpolated_w = (1.f / p0.w) * w1 + (1.f / p1.w) * w2 + (1.f / p2.w) * w3;
          F32* depth = depth_buffer + (x[i] + y * dst->x);
          if (*depth < interpolated_w) {
            PROFILE_SCOPE(fill_triangle_after_depth_test);
            *depth = interpolated_w;
            F32 invw0 = (w1 / p0.w);
            F32 invw1 = (w2 / p1.w);
            F32 invw2 = (w3 / p2.w);

            Vec3 norm = (norm0 * invw0 + norm1 * invw1 + norm2 * invw2) / interpolated_w;
            F32 u = tex0.x * invw0 + tex1.x * invw1 + tex2.x * invw2;
            F32 v = tex0.y * invw0 + tex1.y * invw1 + tex2.y * invw2;
            {
              u /= interpolated_w;
              v /= interpolated_w;
              u = u - floor(u);
              v = v - floor(v);
              u = u * (src->x - 1);
              v = v * (src->y - 1);
            }
            S64 ui = (S64)(u);
            S64 vi = (S64)(v);
            //F32 udiff = u - (F32)ui;
            //F32 vdiff = v - (F32)vi;
            // Origin UV (0,0) is in bottom left
            U32 *dst_pixel = destination + x[i];
            U32 *pixel = src->pixels + (ui + (src->y - 1ll - vi) * src->x);

            Vec4 result_color; {
              U32 c = *pixel;
              F32 a = ((c & 0xff000000) >> 24) / 255.f;
              F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
              F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
              F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
              r*=r;
              g*=g;
              b*=b;
              result_color = { r,g,b,a };
            }

            Vec4 dst_color; {
              U32 c = *dst_pixel;
              F32 a = ((c & 0xff000000) >> 24) / 255.f;
              F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
              F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
              F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
              r*=r; g*=g; b*=b;
              dst_color = { r,g,b,a };
            }

  #if 0
            Vec3 light_color = vec3(0.8,0.8,1);
            constexpr F32 ambient_strength = 0.1f; {
              Vec3 ambient = ambient_strength * light_color;
              Vec3 diffuse = clamp_bot(0.f, -dot(norm, light_direction)) * light_color;
              result_color.rgb *= (ambient+diffuse);
            }
  #endif

            result_color = premultiplied_alpha(dst_color, result_color);
            result_color = almost_linear_to_srgb(result_color);
            U32 color32 = vec4_to_u32abgr(result_color);

            *dst_pixel = color32;
          }
        }
        Cx0[0] += dy10;
        Cx1[0] += dy21;
        Cx2[0] += dy02;
      }

    }
    Cy0 -= dx10;
    Cy1 -= dx21;
    Cy2 -= dx02;
    destination += dst->x;
  }
}

function
void draw_triangle_nearest_d_bugged(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
                           Vec4 p0,   Vec4 p1,   Vec4 p2,
                           Vec2 tex0, Vec2 tex1, Vec2 tex2,
                           Vec3 norm0, Vec3 norm1, Vec3 norm2) {
  if(src->pixels == 0) return;

  PROFILE_SCOPE(draw_triangle);
  F32 min_x1 = (F32)(min(p0.x, min(p1.x, p2.x)));
  F32 min_y1 = (F32)(min(p0.y, min(p1.y, p2.y)));
  F32 max_x1 = (F32)(max(p0.x, max(p1.x, p2.x)));
  F32 max_y1 = (F32)(max(p0.y, max(p1.y, p2.y)));

  S64 min_x = (S64)max(0.f, floor(min_x1));
  S64 min_y = (S64)max(0.f, floor(min_y1));
  S64 max_x = (S64)min((F32)dst->x, ceil(max_x1));
  S64 max_y = (S64)min((F32)dst->y, ceil(max_y1));

  if (min_y >= max_y) return;
  if (min_x >= max_x) return;

  F32 dy10 = (p1.y - p0.y);
  F32 dy21 = (p2.y - p1.y);
  F32 dy02 = (p0.y - p2.y);

  F32 dx10 = (p1.x - p0.x);
  F32 dx21 = (p2.x - p1.x);
  F32 dx02 = (p0.x - p2.x);

  F32 C0 = dy10 * (p0.x) - dx10 * (p0.y);
  F32 C1 = dy21 * (p1.x) - dx21 * (p1.y);
  F32 C2 = dy02 * (p2.x) - dx02 * (p2.y);

  F32 Cy0 = dy10 * min_x - dx10 * min_y - C0;
  F32 Cy1 = dy21 * min_x - dx21 * min_y - C1;
  F32 Cy2 = dy02 * min_x - dx02 * min_y - C2;

  Vec8 zero8 = vec8(0);
  Vec8I var07i = vec8i(0,1,2,3,4,5,6,7);
  Vec8 var07 = vec8(0,1,2,3,4,5,6,7);
  Vec8 var1_8 = vec8(1,2,3,4,5,6,7,8);
  Vec8 Dy10 = vec8(dy10) * var1_8;
  Vec8 Dy21 = vec8(dy21) * var1_8;
  Vec8 Dy02 = vec8(dy02) * var1_8;
  Vec8 w0, w1, w2, invw0, invw1, invw2, u, v, interpolated_w;
  Vec8I ui, vi;

  U32 *destination = dst->pixels + dst->x*min_y;
  F32 area = (p1.y - p0.y) * (p2.x - p0.x) - (p1.x - p0.x) * (p2.y - p0.y);
  Vec8 area8 = vec8(area);
  for (S64 y = min_y; y < max_y; y++) {
    Vec8 Cx0 = vec8(Cy0);
    Vec8 Cx1 = vec8(Cy1);
    Vec8 Cx2 = vec8(Cy2);

    for (S64 x8 = min_x; x8 < max_x; x8+=8) {
      PROFILE_SCOPE(fill_triangle_outer);
      Cx0 = vec8(Cx0[7]) + Dy10;
      Cx1 = vec8(Cx1[7]) + Dy21;
      Cx2 = vec8(Cx2[7]) + Dy02;



      Vec8 should_fill;
      {
        Vec8 a = (vec8(x8) + var07);
        Vec8 b = vec8(max_x);
        should_fill = a < b;
        should_fill = should_fill & (Cx0 >= zero8 & Cx1 >= zero8 & Cx2 >= zero8);
      }

      w0 = Cx1 / area8;
      w1 = Cx2 / area8;
      w2 = Cx0 / area8;

      // @Note: We could do: interpolated_w = 1.f / interpolated_w to get proper depth
      // but why waste an instruction, the smaller the depth value the farther the object
      interpolated_w = vec8(1.f / p0.w) * w0 + vec8(1.f / p1.w) * w1 + vec8(1.f / p2.w) * w2;

      F32 *depth_pointer = (depth_buffer + (x8 + y * dst->x));
      Vec8 depth = loadu8(depth_pointer);
      should_fill = should_fill & (depth < interpolated_w);


      invw0 = (w0 / vec8(p0.w));
      invw1 = (w1 / vec8(p1.w));
      invw2 = (w2 / vec8(p2.w));

      u = vec8(tex0.x) * invw0 + vec8(tex1.x) * invw1 + vec8(tex2.x) * invw2;
      v = vec8(tex0.y) * invw0 + vec8(tex1.y) * invw1 + vec8(tex2.y) * invw2;
      u /= interpolated_w;
      v /= interpolated_w;
      u = u - floor8(u);
      v = v - floor8(v);
      u = u * vec8(src->x - 1);
      v = v * vec8(src->y - 1);
      ui = convert_vec8_to_vec8i(u);
      vi = convert_vec8_to_vec8i(v);

      // Origin UV (0,0) is in bottom left
      _mm256_maskstore_epi32((int *)depth_pointer, should_fill.simd, interpolated_w.simd);
      Vec8I indices = ui + ((vec8i(src->y) - vec8i(1) - vi) * vec8i(src->x));
      U32 *pixel[8] = {
        src->pixels + indices.e[0],
        src->pixels + indices.e[1],
        src->pixels + indices.e[2],
        src->pixels + indices.e[3],
        src->pixels + indices.e[4],
        src->pixels + indices.e[5],
        src->pixels + indices.e[6],
        src->pixels + indices.e[7],
      };

      U32 *dst_pixel = destination + x8;
      for(S64 i = 0; i < 8; i++){
        if (should_fill[i]){
          PROFILE_SCOPE(fill_triangle_after_depth_test);

          Vec4 result_color; {
            U32 c = *pixel[i];
            F32 a = ((c & 0xff000000) >> 24) / 255.f;
            F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
            F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
            F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
            r*=r;
            g*=g;
            b*=b;
            result_color = { r,g,b,a };
          }

          Vec4 dst_color; {
            U32 c = dst_pixel[i];
            F32 a = ((c & 0xff000000) >> 24) / 255.f;
            F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
            F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
            F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
            r*=r; g*=g; b*=b;
            dst_color = { r,g,b,a };
          }

#if 0
          Vec3 light_color = vec3(0.8,0.8,1);
          constexpr F32 ambient_strength = 0.1f; {
            Vec3 ambient = ambient_strength * light_color;
            Vec3 diffuse = clamp_bot(0.f, -dot(norm, light_direction)) * light_color;
            result_color.rgb *= (ambient+diffuse);
          }
#endif

          // Premultiplied alpha
          {
            result_color.r = result_color.r + ((1-result_color.a) * dst_color.r);
            result_color.g = result_color.g + ((1-result_color.a) * dst_color.g);
            result_color.b = result_color.b + ((1-result_color.a) * dst_color.b);
            result_color.a = result_color.a + dst_color.a - result_color.a*dst_color.a;
          }

          // Almost linear to srgb
          {
            result_color.r = sqrtf(result_color.r);
            result_color.g = sqrtf(result_color.g);
            result_color.b = sqrtf(result_color.b);
          }

          U32 color32;
          {
            U8 red     = (U8)(result_color.r * 255);
            U8 green   = (U8)(result_color.g * 255);
            U8 blue    = (U8)(result_color.b * 255);
            U8 alpha   = (U8)(result_color.a * 255);
            color32 = (U32)(alpha << 24 | blue << 16 | green << 8 | red << 0);
          }

          dst_pixel[i] = color32;
        }
      }

    }
    Cy0 -= dx10;
    Cy1 -= dx21;
    Cy2 -= dx02;
    destination += dst->x;
  }
}


function
void draw_triangle_nearest_e(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
                           Vec4 p0,   Vec4 p1,   Vec4 p2,
                           Vec2 tex0, Vec2 tex1, Vec2 tex2,
                           Vec3 norm0, Vec3 norm1, Vec3 norm2) {
  if(src->pixels == 0) return;

  PROFILE_SCOPE(draw_triangle);
  F32 min_x1 = (F32)(min(p0.x, min(p1.x, p2.x)));
  F32 min_y1 = (F32)(min(p0.y, min(p1.y, p2.y)));
  F32 max_x1 = (F32)(max(p0.x, max(p1.x, p2.x)));
  F32 max_y1 = (F32)(max(p0.y, max(p1.y, p2.y)));

  S64 min_x = (S64)max(0.f, floor(min_x1));
  S64 min_y = (S64)max(0.f, floor(min_y1));
  S64 max_x = (S64)min((F32)dst->x, ceil(max_x1));
  S64 max_y = (S64)min((F32)dst->y, ceil(max_y1));

  if (min_y >= max_y) return;
  if (min_x >= max_x) return;

  F32 dy10 = (p1.y - p0.y);
  F32 dy21 = (p2.y - p1.y);
  F32 dy02 = (p0.y - p2.y);

  F32 dx10 = (p1.x - p0.x);
  F32 dx21 = (p2.x - p1.x);
  F32 dx02 = (p0.x - p2.x);

  F32 C0 = dy10 * (p0.x) - dx10 * (p0.y);
  F32 C1 = dy21 * (p1.x) - dx21 * (p1.y);
  F32 C2 = dy02 * (p2.x) - dx02 * (p2.y);

  F32 Cy0 = dy10 * min_x - dx10 * min_y - C0;
  F32 Cy1 = dy21 * min_x - dx21 * min_y - C1;
  F32 Cy2 = dy02 * min_x - dx02 * min_y - C2;

  Vec8I var07i = vec8i(0,1,2,3,4,5,6,7);
  Vec8 var07 = vec8(0,1,2,3,4,5,6,7);
  Vec8 var1_8 = vec8(1,2,3,4,5,6,7,8);
  Vec8 Dy10 = vec8(dy10) * var07;
  Vec8 Dy21 = vec8(dy21) * var07;
  Vec8 Dy02 = vec8(dy02) * var07;


  U32 *destination = dst->pixels + dst->x*min_y;
  F32 area = (p1.y - p0.y) * (p2.x - p0.x) - (p1.x - p0.x) * (p2.y - p0.y);
  for (S64 y = min_y; y < max_y; y++) {
    Vec8 Cx0 = vec8(Cy0);
    Vec8 Cx1 = vec8(Cy1);
    Vec8 Cx2 = vec8(Cy2);

    for (S64 x8 = min_x; x8 < max_x; x8+=8) {
      PROFILE_SCOPE(fill_triangle_outer);
      Cx0 = vec8(Cx0[7]) + Dy10*var1_8;
      Cx1 = vec8(Cx1[7]) + Dy21*var1_8;
      Cx2 = vec8(Cx2[7]) + Dy02*var1_8;

      Vec8I x = vec8i(x8) + var07i;
      for(S64 i = 0; i < 8; i++){
        // S64 x = x8+i;

        if (Cx0[i] >= 0 && Cx1[i] >= 0 && Cx2[i] >= 0) {
          PROFILE_SCOPE(fill_triangle_inner);
          F32 w1 = Cx1[i] / area;
          F32 w2 = Cx2[i] / area;
          F32 w3 = Cx0[i] / area;

          // @Note: We could do: interpolated_w = 1.f / interpolated_w to get proper depth
          // but why waste an instruction, the smaller the depth value the farther the object
          F32 interpolated_w = (1.f / p0.w) * w1 + (1.f / p1.w) * w2 + (1.f / p2.w) * w3;
          F32* depth = depth_buffer + (x[i] + y * dst->x);
          if (*depth < interpolated_w) {
            PROFILE_SCOPE(fill_triangle_after_depth_test);
            *depth = interpolated_w;
            F32 invw0 = (w1 / p0.w);
            F32 invw1 = (w2 / p1.w);
            F32 invw2 = (w3 / p2.w);

            Vec3 norm = (norm0 * invw0 + norm1 * invw1 + norm2 * invw2) / interpolated_w;
            F32 u = tex0.x * invw0 + tex1.x * invw1 + tex2.x * invw2;
            F32 v = tex0.y * invw0 + tex1.y * invw1 + tex2.y * invw2;
            {
              u /= interpolated_w;
              v /= interpolated_w;
              u = u - floor(u);
              v = v - floor(v);
              u = u * (src->x - 1);
              v = v * (src->y - 1);
            }
            S64 ui = (S64)(u);
            S64 vi = (S64)(v);
            //F32 udiff = u - (F32)ui;
            //F32 vdiff = v - (F32)vi;
            // Origin UV (0,0) is in bottom left
            U32 *dst_pixel = destination + x[i];
            U32 *pixel = src->pixels + (ui + (src->y - 1ll - vi) * src->x);

            Vec4 result_color; {
              U32 c = *pixel;
              F32 a = ((c & 0xff000000) >> 24) / 255.f;
              F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
              F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
              F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
              r*=r;
              g*=g;
              b*=b;
              result_color = { r,g,b,a };
            }

            Vec4 dst_color; {
              U32 c = *dst_pixel;
              F32 a = ((c & 0xff000000) >> 24) / 255.f;
              F32 b = ((c & 0x00ff0000) >> 16) / 255.f;
              F32 g = ((c & 0x0000ff00) >> 8)  / 255.f;
              F32 r = ((c & 0x000000ff) >> 0)  / 255.f;
              r*=r; g*=g; b*=b;
              dst_color = { r,g,b,a };
            }

  #if 0
            Vec3 light_color = vec3(0.8,0.8,1);
            constexpr F32 ambient_strength = 0.1f; {
              Vec3 ambient = ambient_strength * light_color;
              Vec3 diffuse = clamp_bot(0.f, -dot(norm, light_direction)) * light_color;
              result_color.rgb *= (ambient+diffuse);
            }
  #endif

            result_color = premultiplied_alpha(dst_color, result_color);
            result_color = almost_linear_to_srgb(result_color);
            U32 color32 = vec4_to_u32abgr(result_color);

            *dst_pixel = color32;
          }
        }
      }

    }
    Cy0 -= dx10;
    Cy1 -= dx21;
    Cy2 -= dx02;
    destination += dst->x;
  }
}


function
void draw_triangle_nearest_f(Bitmap* dst, F32 *depth_buffer, Bitmap *src, Vec3 light_direction,
                           Vec4 p0,   Vec4 p1,   Vec4 p2,
                           Vec2 tex0, Vec2 tex1, Vec2 tex2,
                           Vec3 norm0, Vec3 norm1, Vec3 norm2) {
  if(src->pixels == 0) return;

  PROFILE_SCOPE(draw_triangle);

  F32 min_x1 = (F32)(min(p0.x, min(p1.x, p2.x)));
  F32 min_y1 = (F32)(min(p0.y, min(p1.y, p2.y)));
  F32 max_x1 = (F32)(max(p0.x, max(p1.x, p2.x)));
  F32 max_y1 = (F32)(max(p0.y, max(p1.y, p2.y)));

  S64 min_x = (S64)max(0.f, floor(min_x1));
  S64 min_y = (S64)max(0.f, floor(min_y1));
  S64 max_x = (S64)min((F32)dst->x, ceil(max_x1));
  S64 max_y = (S64)min((F32)dst->y, ceil(max_y1));

  if (min_y >= max_y) return;
  if (min_x >= max_x) return;

  F32 dy10 = (p1.y - p0.y);
  F32 dy21 = (p2.y - p1.y);
  F32 dy02 = (p0.y - p2.y);

  F32 dx10 = (p1.x - p0.x);
  F32 dx21 = (p2.x - p1.x);
  F32 dx02 = (p0.x - p2.x);

  F32 C0 = dy10 * (p0.x) - dx10 * (p0.y);
  F32 C1 = dy21 * (p1.x) - dx21 * (p1.y);
  F32 C2 = dy02 * (p2.x) - dx02 * (p2.y);

  F32 Cy0 = dy10 * min_x - dx10 * min_y - C0;
  F32 Cy1 = dy21 * min_x - dx21 * min_y - C1;
  F32 Cy2 = dy02 * min_x - dx02 * min_y - C2;

  Vec8 var255 = vec8(255);
  Vec8 zero8 = vec8(0);
  Vec8 var1 = vec8(1);
  Vec8I var0i = vec8i(0);
  Vec8I var1i = vec8i(1);
  Vec8I var07i = vec8i(0,1,2,3,4,5,6,7);
  Vec8 var07 = vec8(0,1,2,3,4,5,6,7);
  Vec8 var1_8 = vec8(1,2,3,4,5,6,7,8);
  Vec8 Dy10 = vec8(dy10) * var1_8;
  Vec8 Dy21 = vec8(dy21) * var1_8;
  Vec8 Dy02 = vec8(dy02) * var1_8;

  Vec8 iw_term0 = vec8(1.f / p0.w);
  Vec8 iw_term1 = vec8(1.f / p1.w);
  Vec8 iw_term2 = vec8(1.f / p2.w);

  U32 *destination = dst->pixels + dst->x*min_y;
  F32 area = (p1.y - p0.y) * (p2.x - p0.x) - (p1.x - p0.x) * (p2.y - p0.y);
  Vec8 area8 = vec8(area);

  U64 fill_pixels_begin = __rdtsc();
  for (S64 y = min_y; y < max_y; y++) {
    Vec8 Cx0 = vec8(Cy0);
    Vec8 Cx1 = vec8(Cy1);
    Vec8 Cx2 = vec8(Cy2);

    for (S64 x8 = min_x; x8 < max_x; x8+=8) {
      Cx0 = vec8(Cx0[7]) + Dy10;
      Cx1 = vec8(Cx1[7]) + Dy21;
      Cx2 = vec8(Cx2[7]) + Dy02;

      Vec8 should_fill;
      {
        Vec8 a = (vec8(x8) + var07);
        Vec8 b = vec8(max_x);
        should_fill = a < b;
        should_fill = should_fill & (Cx0 >= zero8 & Cx1 >= zero8 & Cx2 >= zero8);
      }

      Vec8 w0 = Cx1 / area8;
      Vec8 w1 = Cx2 / area8;
      Vec8 w2 = Cx0 / area8;

      // @Note: We could do: interpolated_w = 1.f / interpolated_w to get proper depth
      // but why waste an instruction, the smaller the depth value the farther the object
      Vec8 interpolated_w = iw_term0 * w0 + iw_term1 * w1 + iw_term2 * w2;
      F32 *depth_pointer = (depth_buffer + (x8 + y * dst->x));
      Vec8 depth = loadu8(depth_pointer);
      should_fill = should_fill & (depth < interpolated_w);


      Vec8 invw0 = (w0 / vec8(p0.w));
      Vec8 invw1 = (w1 / vec8(p1.w));
      Vec8 invw2 = (w2 / vec8(p2.w));

      Vec8 u = vec8(tex0.x) * invw0 + vec8(tex1.x) * invw1 + vec8(tex2.x) * invw2;
      Vec8 v = vec8(tex0.y) * invw0 + vec8(tex1.y) * invw1 + vec8(tex2.y) * invw2;
      u /= interpolated_w;
      v /= interpolated_w;
      u = u - floor8(u);
      v = v - floor8(v);
      u = u * vec8(src->x - 1);
      v = v * vec8(src->y - 1);
      Vec8I ui = convert_vec8_to_vec8i(u);
      Vec8I vi = convert_vec8_to_vec8i(v);

      // Origin UV (0,0) is in bottom left
      _mm256_maskstore_epi32((int *)depth_pointer, should_fill.simd, interpolated_w.simd);
      Vec8I indices = ui + ((vec8i(src->y) - var1i - vi) * vec8i(src->x));
      S32 size = src->x * src->y;
      indices.simd = _mm256_min_epi32(_mm256_set1_ps(size), indices.simd);
      indices.simd = _mm256_max_epi32(var0i.simd, indices.simd);

      //
      // Fetch and calculate texel values
      //
      Vec8I pixel;
      if(should_fill[0]) pixel.e[0] = src->pixels[indices.e[0]];
      if(should_fill[1]) pixel.e[1] = src->pixels[indices.e[1]];
      if(should_fill[2]) pixel.e[2] = src->pixels[indices.e[2]];
      if(should_fill[3]) pixel.e[3] = src->pixels[indices.e[3]];
      if(should_fill[4]) pixel.e[4] = src->pixels[indices.e[4]];
      if(should_fill[5]) pixel.e[5] = src->pixels[indices.e[5]];
      if(should_fill[6]) pixel.e[6] = src->pixels[indices.e[6]];
      if(should_fill[7]) pixel.e[7] = src->pixels[indices.e[7]];

      Vec8I texel_i_a = pixel & vec8i(0xff000000);
      Vec8I texel_i_b = pixel & vec8i(0x00ff0000);
      Vec8I texel_i_g = pixel & vec8i(0x0000ff00);
      Vec8I texel_i_r = pixel & vec8i(0x000000ff);

      // Alpha is done this way because signed integer shift is weird
      // When sign bit is set it sets all bits that we shift the sign through
      // So first we shift
      texel_i_a = (texel_i_a >> 24);
      texel_i_a = texel_i_a & vec8i(0x000000ff);
      texel_i_b = (texel_i_b >> 16);
      texel_i_g = (texel_i_g >> 8 );
      texel_i_r = (texel_i_r >> 0 );

      Vec8 texel_a = convert_vec8i_to_vec8(texel_i_a);
      Vec8 texel_b = convert_vec8i_to_vec8(texel_i_b);
      Vec8 texel_g = convert_vec8i_to_vec8(texel_i_g);
      Vec8 texel_r = convert_vec8i_to_vec8(texel_i_r);

      Vec8 v255 = vec8(255.f);
      texel_a = texel_a / v255;
      texel_b = texel_b / v255;
      texel_g = texel_g / v255;
      texel_r = texel_r / v255;

      texel_r = texel_r * texel_r;
      texel_g = texel_g * texel_g;
      texel_b = texel_b * texel_b;

      //
      // Fetch and calculate dst pixels
      //
      U32 *dst_memory = destination + x8;
      Vec8I dst_pixel = {_mm256_maskload_epi32((const int *)dst_memory, should_fill.simd)};

      Vec8I dst_i_a = dst_pixel & vec8i(0xff000000);
      Vec8I dst_i_b = dst_pixel & vec8i(0x00ff0000);
      Vec8I dst_i_g = dst_pixel & vec8i(0x0000ff00);
      Vec8I dst_i_r = dst_pixel & vec8i(0x000000ff);

      dst_i_a = dst_i_a >> 24;
      dst_i_a = dst_i_a &  vec8i(0x000000ff);
      dst_i_b = dst_i_b >> 16 ;
      dst_i_g = dst_i_g >> 8;

      Vec8 dst_a = convert_vec8i_to_vec8(dst_i_a) / var255;
      Vec8 dst_b = convert_vec8i_to_vec8(dst_i_b) / var255;
      Vec8 dst_g = convert_vec8i_to_vec8(dst_i_g) / var255;
      Vec8 dst_r = convert_vec8i_to_vec8(dst_i_r) / var255;

      dst_r *= dst_r;
      dst_g *= dst_g;
      dst_b *= dst_b;

      // Premultiplied alpha
      {
        dst_r = texel_r + ((var1-texel_a) * dst_r);
        dst_g = texel_g + ((var1-texel_a) * dst_g);
        dst_b = texel_b + ((var1-texel_a) * dst_b);
        dst_a = texel_a + dst_a - texel_a*dst_a;
      }

      // Almost linear to srgb
      {
        dst_r.simd = {_mm256_sqrt_ps(dst_r.simd)};
        dst_g.simd = {_mm256_sqrt_ps(dst_g.simd)};
        dst_b.simd = {_mm256_sqrt_ps(dst_b.simd)};
      }

      Vec8I result;
      for(S64 i = 0; i < 8; i++){
        if (should_fill[i]){
            U8 red     = (U8)(dst_r[i] * 255);
            U8 green   = (U8)(dst_g[i] * 255);
            U8 blue    = (U8)(dst_b[i] * 255);
            U8 alpha   = (U8)(dst_a[i] * 255);
            result.e[i] = (U32)(alpha << 24 | blue << 16 | green << 8 | red << 0);
        }
      }

      _mm256_maskstore_epi32((int *)dst_memory, should_fill.simd, result.simd);

    }
    Cy0 -= dx10;
    Cy1 -= dx21;
    Cy2 -= dx02;
    destination += dst->x;
  }
  U64 end_time = __rdtsc();

  filled_pixel_total_time += end_time - fill_pixels_begin;
  filled_pixel_count      += (max_x - min_x)*(max_y - min_y);
}