private static DynamicResolutionHandler GetOrCreateDrsInstanceHandler(Camera camera)
{
if (camera == null)
{
return(null);
}
DynamicResolutionHandler instance = null;
var key = camera.GetInstanceID();
if (!s_CameraInstances.TryGetValue(key, out instance))
{
//if this camera is not available in the map of cameras lets try creating one.
//first and foremost, if we exceed the dictionary capacity, lets try and recycle an object that is dead.
if (s_CameraInstances.Count >= CameraDictionaryMaxcCapacity)
{
int recycledInstanceKey = 0;
DynamicResolutionHandler recycledInstance = null;
foreach (var kv in s_CameraInstances)
{
//is this object dead? that is, belongs to a camera that was destroyed?
if (kv.Value.m_OwnerCameraWeakRef == null || !kv.Value.m_OwnerCameraWeakRef.IsAlive)
{
recycledInstance = kv.Value;
recycledInstanceKey = kv.Key;
break;
}
}
if (recycledInstance != null)
{
instance = recycledInstance;
s_CameraInstances.Remove(recycledInstanceKey);
s_CameraUpscaleFilters.Remove(recycledInstanceKey);
}
}
//if we didnt find a dead object, we create one from scratch.
if (instance == null)
{
instance = new DynamicResolutionHandler();
instance.m_OwnerCameraWeakRef = new WeakReference(camera);
}
else
{
//otherwise, we found a dead object, lets reset it, and have a weak ref to this camera,
//so we can possibly recycle it in the future by checking the camera's weak pointer state.
instance.Reset();
instance.m_OwnerCameraWeakRef.Target = camera;
}
s_CameraInstances.Add(key, instance);
}
return(instance);
}
/// <summary>
/// Update the state of the dynamic resolution system for a specific camera.
/// Call this function also to switch context between cameras (will set the current camera as active).
/// Passing a null camera has the same effect as calling Update without the camera parameter.
/// </summary>
/// <param name="camera">Camera used to select a specific instance tied to this DynamicResolutionHandler instance.</param>
/// <param name="settings">(optional) The settings that are to be used by the dynamic resolution system. passing null for the settings will result in the last update's settings used.</param>
/// <param name="OnResolutionChange">An action that will be called every time the dynamic resolution system triggers a change in resolution.</param>
public static void UpdateAndUseCamera(Camera camera, GlobalDynamicResolutionSettings?settings = null, Action OnResolutionChange = null)
{
int newCameraId;
if (camera == null)
{
s_ActiveInstance = s_DefaultInstance;
newCameraId = 0;
}
else
{
s_ActiveInstance = GetOrCreateDrsInstanceHandler(camera);
newCameraId = camera.GetInstanceID();
}
s_ActiveInstanceDirty = newCameraId != s_ActiveCameraId;
s_ActiveCameraId = newCameraId;
s_ActiveInstance.Update(settings.HasValue ? settings.Value : s_ActiveInstance.m_CachedSettings, OnResolutionChange);
}
/// <summary>
/// Will clear the currently used camera. Use this function to restore the default instance when UpdateAndUseCamera is called.
/// </summary>
public static void ClearSelectedCamera()
{
s_ActiveInstance = s_DefaultInstance;
s_ActiveCameraId = 0;
s_ActiveInstanceDirty = true;
}
