anim_key_frame_mangler.hpp

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#pragma once
 
#include <compare>
#include <cstddef>
#include <set>
#include <string>
#include <vector>
 
#include "gsl/pointers"
 
#include "porytiles/domain/models/index_pixel.hpp"
#include "porytiles/domain/models/palette.hpp"
#include "porytiles/domain/models/pixel_tile.hpp"
#include "porytiles/domain/models/rgba32.hpp"
#include "porytiles/domain/services/tile_printer.hpp"
#include "porytiles/utilities/result/chainable_result.hpp"
#include "porytiles/xcut/diagnostics/user_diagnostics.hpp"
 
namespace porytiles {
 
struct PixelMangleChange {
    std::size_t pixel_index{}; 
    IndexPixel original_pixel; 
    IndexPixel mangled_pixel;  
};
 
struct TileMangleRecord {
    std::size_t tile_index{}; 
    std::vector<PixelMangleChange> pixel_changes; 
 
    [[nodiscard]] friend auto operator<=>(const TileMangleRecord &lhs, const TileMangleRecord &rhs)
    {
        return lhs.tile_index <=> rhs.tile_index;
    }
 
    [[nodiscard]] friend bool operator==(const TileMangleRecord &lhs, const TileMangleRecord &rhs)
    {
        return lhs.tile_index == rhs.tile_index;
    }
};
 
struct MangleResult {
    std::vector<PixelTile<IndexPixel>> tiles; 
    // Keyed by tile_index: the set structurally enforces that each record targets a distinct tile.
    std::set<TileMangleRecord> mangle_records; 
};
 
class AnimKeyFrameMangler {
  public:
    explicit AnimKeyFrameMangler(
        gsl::not_null<const UserDiagnostics *> diag, gsl::not_null<const TilePrinter *> tile_printer);
 
    virtual ~AnimKeyFrameMangler() = default;
 
    [[nodiscard]] ChainableResult<MangleResult> mangle_duplicates(
        const std::string &anim_name,
        std::vector<PixelTile<IndexPixel>> tiles,
        const std::vector<const Palette<Rgba32, pal::max_size> *> &palettes,
        const Rgba32 &extrinsic_transparency,
        const std::set<PixelTile<IndexPixel>> &existing_tiles) const;
 
  private:
    const UserDiagnostics *diag_;
    const TilePrinter *tile_printer_;
};
 
} // namespace porytiles