#pragma once
// IMVU's images (Pixmap), through pixmap.dll's exported methods rather than depending on their layout (only their
// size, for making our own).

#include <cstddef>
#include <cstdint>
#include <optional>

#include "t5de/imvu/types.hpp"

namespace t5de {

struct PixmapPixels {
    std::uint32_t width;
    std::uint32_t height;
    std::uint32_t rowBytes;
    std::uint32_t* pixels; // 0xAARRGGBB, rows rowBytes apart
};

// Null if pixmap.dll's methods can't be found.
std::optional<PixmapPixels> pixmap_pixels(const imvu::Pixmap& pixmap);

// A Pixmap of our own, made and destroyed by pixmap.dll.
class OwnedPixmap {
public:
    // Width by height; invalid if pixmap.dll's methods can't be found.
    OwnedPixmap(int width, int height);
    OwnedPixmap(const OwnedPixmap&) = delete;
    OwnedPixmap& operator=(const OwnedPixmap&) = delete;
    ~OwnedPixmap();

    [[nodiscard]] bool valid() const { return valid_; }
    [[nodiscard]] const imvu::Pixmap& get() const { return *reinterpret_cast<const imvu::Pixmap*>(storage_); }

    // Constructs a copy in result (raw memory for a Pixmap, as for a Pixmap returned by value); an empty Pixmap if
    // this one isn't valid.
    imvu::Pixmap* copyTo(imvu::Pixmap* result) const;

private:
    // sizeof(Pixmap) in pixmap.dll: its constructors set 7 fields.
    alignas(4) std::byte storage_[28];
    bool valid_ = false;
};

} // namespace t5de