Function LoadAndApplyGraphicsConfig

apps/cwr/Game/GameApplication.cpp:367–397

Eager-write defaults (autodetected) if the file is missing, then apply the cfg values to the live engine. Normalize-but-don't- persist mirrors AudioConfig + DisplayConfig.

    int GetSystemRamMB() const override { return SDL_GetSystemRAM(); }
};

std::string GraphicsConfigPath()
{
    return GamePaths::Instance().UserDir() + "graphics.cfg";
}

// Eager-write defaults (autodetected) if the file is missing, then
// apply the cfg values to the live engine.  Normalize-but-don't-
// persist mirrors AudioConfig + DisplayConfig.
void LoadAndApplyGraphicsConfig()
{
    const std::string path = GraphicsConfigPath();
    const int refreshHz = GEngine ? GEngine->RefreshRate() : 0;
    GraphicsConfig cfg;
    if (!cfg.Load(path))
    {
        // First boot autodetects from hardware.  vsync / brightness / gamma
        // keep their class-default values.
        cfg.LoadDefaults();
        const int ramMB = SDL_GetSystemRAM();
        cfg.qualityPreset = GraphicsConfig::PickPresetFromRam(ramMB);
        cfg.ApplyPresetToTiers(cfg.qualityPreset);
        cfg.fpsCap = GraphicsConfig::FpsCapForRefreshRate(refreshHz);
        cfg.Save(path);
        LOG_INFO(Graphics,
                 "LoadGraphicsConfig: autodetected preset={} (RAM={} MB) fpsCap={} (display {} Hz), wrote '{}'",
                 (int)cfg.qualityPreset, ramMB, cfg.fpsCap, refreshHz, path);
    }

    if (cfg.Migrate(refreshHz) && cfg.Save(path))
        LOG_INFO(Graphics, "LoadGraphicsConfig: migrated '{}' to version {} (fpsCap={}, display {} Hz)", path,
                 GraphicsConfig::kVersion, cfg.fpsCap, refreshHz);

    LiveGraphicsEnv env;