Added missing files

src/frontend/BlocksPreview.h

@@ -0,0 +1,28 @@
+#ifndef FRONTEND_BLOCKS_PREVIEW_H_
+#define FRONTEND_BLOCKS_PREVIEW_H_
+
+#include "../typedefs.h"
+#include <glm/glm.hpp>
+
+class Shader;
+class Atlas;
+class Batch3D;
+class Camera;
+class Block;
+class ContentGfxCache;
+
+class BlocksPreview {
+    Shader* shader;
+    Atlas* atlas;
+    Batch3D* batch;
+    Camera* camera;
+    const ContentGfxCache* const cache;
+public:
+    BlocksPreview(Shader* shader, Atlas* atlas, const ContentGfxCache* cache);
+    ~BlocksPreview();
+
+    void begin();
+    void draw(const Block* block, int x, int y, int size, glm::vec4 tint);
+};
+
+#endif // FRONTEND_BLOCKS_PREVIEW_H_