Added some code

source/gfx.c

@@ -0,0 +1,41 @@
+#include <sf2d.h>
+
+#include <lua.h>
+#include <lauxlib.h>
+
+u32 defaultColor = RGBA8(255, 255, 255, 255);
+
+static int gfx_render(lua_State *L) {
+	sf2d_end_frame();
+	sf2d_swapbuffers();
+	sf2d_start_frame(GFX_TOP, GFX_LEFT);
+
+	return 0;
+}
+
+static int gfx_rectangle(lua_State *L) {
+	int x = luaL_checkinteger(L, 1);
+	int y = luaL_checkinteger(L, 2);
+	int width = luaL_checkinteger(L, 3);
+	int height = luaL_checkinteger(L, 4);
+	u32 color = luaL_optinteger(L, 5, defaultColor);
+	
+	sf2d_draw_rectangle(x, y, width, height, color);
+
+	return 0;
+}
+
+static const struct luaL_Reg gfx_lib[] = {
+	{ "render",      gfx_render    },
+	{ "rectangle",   gfx_rectangle },
+	{ NULL, NULL }
+};
+
+int luaopen_gfx_lib(lua_State *L) {
+	luaL_newlib(L, gfx_lib);
+	return 1;
+}
+
+void load_gfx_lib(lua_State *L) {
+	luaL_requiref(L, "ctr.gfx", luaopen_gfx_lib, 0);
+}