feat: add group id to share the bake buffer

Packages/src/Editor/CompositeCanvasRendererEditor.cs

@@ -14,6 +14,7 @@ namespace CompositeCanvas
  [CanEditMultipleObjects]
  public class CompositeCanvasRendererEditor : GraphicEditor
  {
+ private static readonly GUIContent s_ContentPrimaryRenderer = new GUIContent("Primary Renderer");
  private static readonly GUIContent s_ContentNone = new GUIContent("None");
  private static readonly GUIContent s_ContentEffect = new GUIContent("Effect");
  private static readonly GUIContent s_ContentAttachedEffect = new GUIContent("Attached Effect");
@@ -33,6 +34,7 @@ public class CompositeCanvasRendererEditor : GraphicEditor
  private SerializedProperty _extents;
  private SerializedProperty _foreground;
  private Editor _materialEditor;
+ private SerializedProperty _sharingGroupId;
  private SerializedProperty _showSourceGraphics;
  private SerializedProperty _srcBlendMode;
  private SerializedProperty _useCanvasScaler;
@@ -47,6 +49,7 @@ protected override void OnEnable()
  _showSourceGraphics = serializedObject.FindProperty("m_ShowSourceGraphics");
  _downSamplingRate = serializedObject.FindProperty("m_DownSamplingRate");
  _useCanvasScaler = serializedObject.FindProperty("m_UseCanvasScaler");
+ _sharingGroupId = serializedObject.FindProperty("m_SharingGroupId");
  _foreground = serializedObject.FindProperty("m_Foreground");
  _extents = serializedObject.FindProperty("m_Extents");
  _culling = serializedObject.FindProperty("m_Culling");
@@ -84,6 +87,8 @@ public override void OnInspectorGUI()
  EditorGUILayout.PropertyField(_useCanvasScaler);
  EditorGUILayout.PropertyField(_extents);
  EditorGUILayout.PropertyField(_useStencil);
+ EditorGUILayout.PropertyField(_sharingGroupId);
+ ShowPrimaryRenderer();
 
  // Baking Settings
  EditorGUILayout.PropertyField(_bakingTrigger);
@@ -127,6 +132,20 @@ public override void OnInspectorGUI()
  }
  }
 
+ private void ShowPrimaryRenderer()
+ {
+ if (_sharingGroupId.intValue == 0) return;
+
+ EditorGUI.indentLevel++;
+ EditorGUI.showMixedValue = _sharingGroupId.hasMultipleDifferentValues;
+ EditorGUI.BeginDisabledGroup(true);
+ var obj = CompositeCanvasRenderer.GetFirstGroupedRenderer(_sharingGroupId.intValue);
+ EditorGUILayout.ObjectField(s_ContentPrimaryRenderer, obj, typeof(CompositeCanvasRenderer), true);
+ EditorGUI.EndDisabledGroup();
+ EditorGUI.showMixedValue = false;
+ EditorGUI.indentLevel--;
+ }
+
  private void ShowSourceGraphicsControlGUI()
  {
  EditorGUI.BeginChangeCheck();

Packages/src/Runtime/CompositeCanvasRenderer.cs

@@ -33,6 +33,9 @@ public class CompositeCanvasRenderer : MaskableGraphic
 
  private static readonly VertexHelper s_VertexHelper = new VertexHelper();
 
+ private static readonly LinkedList<CompositeCanvasRenderer> s_ActiveRenderers =
+ new LinkedList<CompositeCanvasRenderer>();
+
  [SerializeField]
  [Header("Buffer")]
  [Tooltip("Down sampling rate for baking.\n" +
@@ -44,6 +47,11 @@ public class CompositeCanvasRenderer : MaskableGraphic
  "If false, the bake-buffer is the same size as the rendering size.")]
  private bool m_UseCanvasScaler = true;
 
+ [Tooltip("Bake buffer sharing group ID.\n" +
+ "If non-zero is specified, the baked buffer are shared within the group.")]
+ [SerializeField]
+ private int m_SharingGroupId;
+
  [SerializeField]
  [Tooltip("View type to bake.\n" +
  "Automatic: Use orthographic space to bake if possible.\n" +
@@ -218,6 +226,21 @@ public bool useCanvasScaler
  }
  }
 
+ /// <summary>
+ /// Bake buffer sharing group ID.
+ /// If non-zero is specified, the baked buffer are shared within the group.
+ /// </summary>
+ public int sharingGroupId
+ {
+ get => m_SharingGroupId;
+ set
+ {
+ if (m_SharingGroupId == value) return;
+ m_SharingGroupId = value;
+ SetDirty();
+ }
+ }
+
  /// <summary>
  /// Down sampling rate for baking.
  /// The higher this value, the lower the resolution of the bake, but the performance will improve.
@@ -301,10 +324,11 @@ public override Texture mainTexture
  }
 
  var rate = (int)downSamplingRate;
- return TemporaryRenderTexture.Get(size, rate, ref _bakeBuffer, useStencil);
+ var id = sharingGroupId == 0 ? GetInstanceID() : sharingGroupId;
+ return RenderTextureRepository.Get(id, size, rate, ref _bakeBuffer, useStencil);
  }
 
- TemporaryRenderTexture.Release(ref _bakeBuffer);
+ RenderTextureRepository.Release(ref _bakeBuffer);
  return null;
  }
  }
@@ -463,20 +487,24 @@ protected override void OnEnable()
  {
  SetDirty();
  }
+
+ s_ActiveRenderers.AddLast(this);
  }
 
  /// <summary>
  /// This function is called when the behaviour becomes disabled.
  /// </summary>
  protected override void OnDisable()
  {
+ s_ActiveRenderers.Remove(this);
+
  UIExtraCallbacks.onBeforeCanvasRebuild -= _checkTransformChanged;
  UIExtraCallbacks.onAfterCanvasRebuild -= _bake;
 
  isDirty = false;
  s_CommandBufferPool.Return(ref _cb);
- TemporaryRenderTexture.Release(ref _bakeBuffer);
- MaterialRegistry.Release(ref _renderingMaterial);
+ RenderTextureRepository.Release(ref _bakeBuffer);
+ MaterialRepository.Release(ref _renderingMaterial);
  base.OnDisable();
 
  canvasRenderer.hasPopInstruction = false;
@@ -630,14 +658,14 @@ public override Material GetModifiedMaterial(Material baseMaterial)
  {
  if (!isActiveAndEnabled || baseMaterial.shader != defaultMaterial.shader)
  {
- MaterialRegistry.Release(ref _renderingMaterial);
+ MaterialRepository.Release(ref _renderingMaterial);
  return baseMaterial;
  }
 
  Profiler.BeginSample("(CCR)[CompositeCanvasRenderer] GetModifiedMaterial > Get material");
  var hash = CreateHash(colorMode, srcBlendMode, dstBlendMode);
  _createMaterial = _createMaterial ?? CreateMaterial;
- MaterialRegistry.Get(hash, ref _renderingMaterial, _createMaterial);
+ MaterialRepository.Get(hash, ref _renderingMaterial, _createMaterial);
  Profiler.EndSample();
 
  return _renderingMaterial;
@@ -835,6 +863,18 @@ private bool IsInCanvasViewport()
  return result;
  }
 
+ internal static CompositeCanvasRenderer GetFirstGroupedRenderer(int groupId)
+ {
+ var node = s_ActiveRenderers.First;
+ while (node != null)
+ {
+ if (node.Value.sharingGroupId == groupId) return node.Value;
+ node = node.Next;
+ }
+
+ return null;
+ }
+
  /// <summary>
  /// Render the bake buffer using the source graphic.
  /// </summary>
@@ -851,6 +891,15 @@ private void Bake()
  return;
  }
 
+ if (sharingGroupId != 0)
+ {
+ if (GetFirstGroupedRenderer(sharingGroupId) != this)
+ {
+ canvasRenderer.SetTexture(mainTexture);
+ return;
+ }
+ }
+
  if (!IsAnySourceInRenderer())
  {
  Logging.Log(this,