just a minor refactor, nothing special

src/graphics/core/Atlas.hpp

@@ -0,0 +1,61 @@
+#ifndef GRAPHICS_CORE_ATLAS_H_
+#define GRAPHICS_CORE_ATLAS_H_
+
+#include <set>
+#include <string>
+#include <memory>
+#include <vector>
+#include <unordered_map>
+#include "../../maths/UVRegion.h"
+#include "../../typedefs.h"
+
+class ImageData;
+class Texture;
+
+class Atlas {
+    std::unique_ptr<Texture> texture;
+    std::unique_ptr<ImageData> image;
+    std::unordered_map<std::string, UVRegion> regions;
+public:
+    /// @param image atlas raster
+    /// @param regions atlas regions
+    /// @param prepare generate texture (.prepare())
+    Atlas(
+        std::unique_ptr<ImageData> image, 
+        std::unordered_map<std::string, UVRegion> regions, 
+        bool prepare
+    );
+    ~Atlas();
+
+    void prepare();
+
+    bool has(const std::string& name) const;
+    const UVRegion& get(const std::string& name) const;
+
+    Texture* getTexture() const;
+    ImageData* getImage() const;
+};
+
+struct atlasentry {
+    std::string name;
+    std::shared_ptr<ImageData> image;
+};
+
+class AtlasBuilder {
+    std::vector<atlasentry> entries;
+    std::set<std::string> names;
+public:
+    AtlasBuilder() {}
+    void add(std::string name, std::unique_ptr<ImageData> image);
+    bool has(const std::string& name) const;
+    const std::set<std::string>& getNames() { return names; };
+
+    /// @brief Build atlas from all added images
+    /// @param extrusion textures extrusion pixels 
+    /// (greather is less mip-mapping artifacts)
+    /// @param prepare generate atlas texture (calls .prepare()) 
+    /// @param maxResolution max atlas resolution
+    Atlas* build(uint extrusion, bool prepare=true, uint maxResolution=0);
+};
+
+#endif // GRAPHICS_CORE_ATLAS_H_