TextureLoader.h

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// SPDX-FileCopyrightText: 2026 Valentin Eloy
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
 
#include <cstdint>
#include <filesystem>
#include <memory>
#include <optional>
#include <vector>
 
#include "HMI/Graphics/RenderLayer.h"
 
class QRhiTexture;

 
namespace hmi {
 
struct RhiContext;

struct DecodedImage {
    int width = 0;
    int height = 0;
    std::vector<std::uint32_t> pixels;
};

struct LoadedTexture {
    std::shared_ptr<QRhiTexture> texture;
    int width = 0;
    int height = 0;

    [[nodiscard]] TextureHandle handle() const noexcept {
        return texture.get();
    }
};

[[nodiscard]] std::optional<DecodedImage> decodeImageFile(const std::filesystem::path& path);

[[nodiscard]] bool encodeImageFile(const std::filesystem::path& path, const DecodedImage& image);

[[nodiscard]] std::optional<LoadedTexture> createTexture(const RhiContext& context, int width,
                                                         int height,
                                                         const std::vector<std::uint32_t>& pixels);

[[nodiscard]] std::optional<LoadedTexture> loadTextureFromFile(const RhiContext& context,
                                                               const std::filesystem::path& path);
 
}  // namespace hmi