TextureAtlas.h

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// SPDX-FileCopyrightText: 2026 Valentin Eloy
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
 
#include <memory>
 
#include "Core/Ecs/Components/Sprite.h"
#include "HMI/Graphics/ProceduralAtlas.h"
#include "HMI/Graphics/RenderLayer.h"
 
class QRhiTexture;

 
namespace hmi {
 
struct RhiContext;

class TextureAtlas {
public:
    static constexpr const char* ATLAS_FILE_NAME = "atlas.png";

    static constexpr int TILE_SIZE = 16;
    static constexpr int TILES_PER_SIDE = 6;
    static constexpr int PLAYER_FRAME_SIZE = TILE_SIZE;
    static constexpr int PLAYER_FRAME_COLUMNS = TILES_PER_SIDE;

    explicit TextureAtlas(const RhiContext& context);

    [[nodiscard]] TextureHandle textureHandle() const {
        return _texture.get();
    }

    [[nodiscard]] int width() const {
        return _width;
    }

    [[nodiscard]] int height() const {
        return _height;
    }

    [[nodiscard]] static core::AtlasRegion tile(int column, int row);

    [[nodiscard]] static core::AtlasRegion playerFrameRegion(PlayerClipKind clip, int frameIndex);
 
private:
    bool loadFromFile(const RhiContext& context);
    void generateProcedural(const RhiContext& context);
 
    int _width = 0;
    int _height = 0;
    std::shared_ptr<QRhiTexture> _texture;
};
 
}  // namespace hmi