Create DrawQable class, make Image and Canvas DrawQable, and make love.graphics.drawq take a DrawQable as its first argument

src/modules/graphics/opengl/Quad.h

@@ -22,9 +22,8 @@
 #define LOVE_GRAPHICS_OPENGL_QUAD_H
 
 // LOVE
-#include <common/Object.h>
 #include <common/math.h>
-#include <graphics/Drawable.h>
+#include <graphics/Quad.h>
 
 namespace love
 {
@@ -32,19 +31,13 @@ namespace graphics
 {
 namespace opengl
 {
-	class Quad : public Object
+	class Quad : public love::graphics::Quad
 	{
-	public:
-
-		struct Viewport
-		{
-			float x, y, w, h;
-		};
-
-	private:
-
+		
+	protected:
+		
 		vertex vertices[4];
-
+		
 		Viewport viewport;
 		float sw, sh;