Ревью: ручное управление памятью

class Image {
public:
    Image(int w, int h) : w_(w), h_(h), data_(new uint8_t[w * h]) {}
    ~Image() { delete data_; }
    uint8_t* data() { return data_; }
private:
    int w_, h_;
    uint8_t* data_;
};

struct Shape { ~Shape() {} virtual double area() const = 0; };
struct Circle : Shape { std::vector<double> pts; double area() const override { return 0; } };

Image* load(const std::string& path) {
    Image* img = new Image(1920, 1080);
    if (!decode(path, img->data())) return nullptr;
    return img;
}

void draw(std::shared_ptr<Image> img);

void render() {
    Image* raw = load("a.png");
    std::shared_ptr<Image> a(raw);
    std::shared_ptr<Image> b(raw);
    draw(a);
    Shape* s = new Circle;
    delete s;
}