PlaneReference.h

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// SPDX-FileCopyrightText: 2026 Valentin Eloy
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
 
#include <cstdint>
#include <vector>
 
#include "Core/Levels/LevelDraft.h"
#include "HMI/Graphics/TextureLoader.h"

 
namespace hmi {

struct PlaneLayer {
    const DecodedImage* image = nullptr;
    int pixelsPerUnit = 16;
    float opacity = 1.0f;
    bool visible = true;
};

[[nodiscard]] DecodedImage resamplePlane(const DecodedImage& image, int fromPixelsPerUnit,
                                         int toPixelsPerUnit);

[[nodiscard]] DecodedImage buildTileOnionSkin(const core::LevelDraft& draft, int pixelsPerUnit);

[[nodiscard]] DecodedImage flattenPlanes(const std::vector<PlaneLayer>& layers, int pixelsPerUnit,
                                         int widthUnits, int heightUnits);

[[nodiscard]] std::uint32_t alphaOver(std::uint32_t below, std::uint32_t above) noexcept;
 
}  // namespace hmi