Method FromFile

engine/Poseidon/Graphics/Textures/Image.cpp:408–451

}

Image Image::FromFile(const std::string& path)
{
    auto dot = path.find_last_of('.');
    if (dot == std::string::npos)
        return {};

    std::string ext = path.substr(dot);
    std::transform(ext.begin(), ext.end(), ext.begin(), ::tolower);

    // PAA/PAC: use existing decoder → always RGBA8888
    if (ext == ".paa" || ext == ".pac")
    {
        auto decoded = DecodePAAFile(path);
        if (!decoded.valid())
            return {};
        return {decoded.width, decoded.height, PixelFormat::RGBA8888, std::move(decoded.rgba)};
    }

    // PNG/BMP/TGA/JPG: use stb_image → always RGBA8888
    if (ext == ".png" || ext == ".bmp" || ext == ".tga" || ext == ".jpg" || ext == ".jpeg")
    {
        int w = 0, h = 0, channels = 0;
        uint8_t* pixels = stbi_load(path.c_str(), &w, &h, &channels, 4); // force RGBA
        if (!pixels)
            return {};
        std::vector<uint8_t> data(pixels, pixels + w * h * 4);
        stbi_image_free(pixels);
        return {w, h, PixelFormat::RGBA8888, std::move(data)};
    }

    // DDS: read first mipmap, decode DXT if needed → RGBA8888
    if (ext == ".dds")
    {
        auto dds = DDSConverter::ReadDDS(path);
        if (!dds.valid())
            return {};
        if (dds.format == PixelFormat::RGBA8888)
            return {dds.width, dds.height, PixelFormat::RGBA8888, std::move(dds.mipmaps[0].data)};
        // DXT: store as-is (Image can hold DXT data)
        return {dds.width, dds.height, dds.format, std::move(dds.mipmaps[0].data)};
    }

    return {};
}

Image Image::ToRGBA() const
{