added obround might need to optomize or add rotation in the futrue

src/graphics/sdl/obround.c

@@ -0,0 +1,46 @@
+#ifdef ARC_SDL
+#include "arc/graphics/obround.h"
+#include "arc/graphics/sdl/renderer.h"
+#include <stdlib.h>
+
+//Modified from https://stackoverflow.com/questions/38334081/how-to-draw-circles-arcs-and-vector-graphics-in-sdl
+void ARC_Obround_Render(ARC_Obround *obround, ARC_Renderer *renderer, ARC_Color *color){
+    SDL_SetRenderDrawColor((SDL_Renderer *)renderer, color->r, color->g, color->b, color->a);
+
+    int32_t diameter = (obround->r * 2);
+
+    int32_t x = (obround->r - 1);
+    int32_t y = 0;
+    int32_t tx = 1;
+    int32_t ty = 1;
+    int32_t error = (tx - diameter);
+
+    SDL_RenderDrawLine((SDL_Renderer *)renderer, obround->x - obround->r, obround->y - (obround->h / 2), obround->x - obround->r, obround->y + (obround->h / 2));
+    SDL_RenderDrawLine((SDL_Renderer *)renderer, obround->x + obround->r, obround->y - (obround->h / 2), obround->x + obround->r, obround->y + (obround->h / 2));
+
+    while(x >= y){
+        //  Each of the following renders an octant of the circle
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x + x, obround->y - y - (obround->h / 2));
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x + x, obround->y + y + (obround->h / 2));
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x - x, obround->y - y - (obround->h / 2));
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x - x, obround->y + y + (obround->h / 2));
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x + y, obround->y - x - (obround->h / 2));
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x + y, obround->y + x + (obround->h / 2));
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x - y, obround->y - x - (obround->h / 2));
+        SDL_RenderDrawPoint((SDL_Renderer *)renderer, obround->x - y, obround->y + x + (obround->h / 2));
+
+        if(error <= 0){
+            ++y;
+            error += ty;
+            ty += 2;
+        }
+
+        if(error > 0){
+            --x;
+            tx += 2;
+            error += (tx - diameter);
+        }
+    }
+}
+
+#endif // ARC_SDL