Function WritePAA

engine/Poseidon/Graphics/Textures/PAAEncoder.cpp:89–134

}

bool WritePAA(const std::string& path, const Image& img, PixelFormat format)
{
    if (!img.valid())
        return false;

    uint16_t magic = paaMagicForFormat(format);
    if (magic == 0)
        return false; // Format not supported as PAA

    // Convert to RGBA first if needed
    Image rgba = img.ToRGBA();
    if (!rgba.valid())
        return false;

    // Generate mipmaps (up to 8 levels, matching engine expectations)
    auto mipmaps = generateMipmaps(rgba, 8);

    FILE* f = fopen(path.c_str(), "wb");
    if (!f)
        return false;

    // 1. Format magic word
    writeU16(f, magic);

    // 2. No TAGG sections (minimal PAA — valid without them)

    // 3. Palette (0 = no palette for non-P8 formats)
    writeU16(f, 0);

    // 4. Mipmap levels
    for (const auto& level : mipmaps)
    {
        auto encoded = encodeLevel(level, format);
        writeU16(f, static_cast<uint16_t>(level.width()));
        writeU16(f, static_cast<uint16_t>(level.height()));
        writeU24(f, static_cast<uint32_t>(encoded.size()));
        fwrite(encoded.data(), 1, encoded.size(), f);
    }

    // 5. Terminator
    writeU16(f, 0);
    writeU16(f, 0);

    fclose(f);
    return true;
}

bool WritePAA(const std::string& path, const Image& img)
{