'Assets', some refactor

src/graphics/Batch2D.h

@@ -0,0 +1,27 @@
+#ifndef SRC_GRAPHICS_BATCH2D_H_
+#define SRC_GRAPHICS_BATCH2D_H_
+
+#include <stdlib.h>
+#include <glm/glm.hpp>
+
+class Mesh;
+
+class Batch2D {
+	float* buffer;
+	size_t capacity;
+	size_t offset;
+	glm::vec4 color;
+	Mesh* mesh;
+
+	void vertex(float x, float y,
+			float u, float v,
+			float r, float g, float b, float a);
+public:
+	Batch2D(size_t capacity);
+	~Batch2D();
+
+	void rect(float x, float y, float w, float h);
+	void render();
+};
+
+#endif /* SRC_GRAPHICS_BATCH2D_H_ */