Add a stub implementation of FlutterMetalCompositor (#25790)
diff --git a/ci/licenses_golden/licenses_flutter b/ci/licenses_golden/licenses_flutter
index 8833bbd..6e51215 100755
--- a/ci/licenses_golden/licenses_flutter
+++ b/ci/licenses_golden/licenses_flutter
@@ -1148,6 +1148,8 @@
FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterKeyboardManager.mm
FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterKeyboardManagerUnittests.mm
FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterMacOSExternalTexture.h
+FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.h
+FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.mm
FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterMetalRenderer.h
FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterMetalRenderer.mm
FILE: ../../../flutter/shell/platform/darwin/macos/framework/Source/FlutterMetalRendererTest.mm
diff --git a/shell/platform/darwin/macos/BUILD.gn b/shell/platform/darwin/macos/BUILD.gn
index 77c83bb..b868ff4 100644
--- a/shell/platform/darwin/macos/BUILD.gn
+++ b/shell/platform/darwin/macos/BUILD.gn
@@ -85,6 +85,8 @@
"framework/Source/FlutterKeyboardManager.mm",
"framework/Source/FlutterMacOSExternalTexture.h",
"framework/Source/FlutterMacOSExternalTexture.h",
+ "framework/Source/FlutterMetalCompositor.h",
+ "framework/Source/FlutterMetalCompositor.mm",
"framework/Source/FlutterMetalRenderer.h",
"framework/Source/FlutterMetalRenderer.mm",
"framework/Source/FlutterMouseCursorPlugin.h",
diff --git a/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.h b/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.h
new file mode 100644
index 0000000..e3b7ee5
--- /dev/null
+++ b/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.h
@@ -0,0 +1,48 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef FLUTTER_METAL_COMPOSITOR_H_
+#define FLUTTER_METAL_COMPOSITOR_H_
+
+#include "flutter/fml/macros.h"
+#include "flutter/shell/platform/darwin/macos/framework/Source/FlutterCompositor.h"
+
+namespace flutter {
+
+class FlutterMetalCompositor : public FlutterCompositor {
+ public:
+ explicit FlutterMetalCompositor(FlutterViewController* view_controller);
+
+ virtual ~FlutterMetalCompositor() = default;
+
+ // Creates a BackingStore and sets backing_store_out to a
+ // FlutterBackingStore struct containing details of the new
+ // backing store.
+ //
+ // If the backing store is being requested for the first time
+ // for a given frame, we do not create a new backing store but
+ // rather return the backing store associated with the
+ // FlutterView's FlutterSurfaceManager.
+ //
+ // Any additional state allocated for the backing store and
+ // saved as user_data in the backing store must be collected
+ // in backing_store_out's destruction_callback field which will
+ // be called when the embedder collects the backing store.
+ bool CreateBackingStore(const FlutterBackingStoreConfig* config,
+ FlutterBackingStore* backing_store_out) override;
+
+ // Releases and deallocates any and all resources that were allocated
+ // for this FlutterBackingStore object in CreateBackingStore.
+ bool CollectBackingStore(const FlutterBackingStore* backing_store) override;
+
+ // Composites the provided FlutterLayer objects and presents the composited
+ // frame to the FlutterView(s).
+ bool Present(const FlutterLayer** layers, size_t layers_count) override;
+
+ FML_DISALLOW_COPY_AND_ASSIGN(FlutterMetalCompositor);
+};
+
+} // namespace flutter
+
+#endif // FLUTTER_METAL_COMPOSITOR_H_
diff --git a/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.mm b/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.mm
new file mode 100644
index 0000000..56de528
--- /dev/null
+++ b/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.mm
@@ -0,0 +1,29 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterMetalCompositor.h"
+
+#include "flutter/fml/logging.h"
+
+namespace flutter {
+
+FlutterMetalCompositor::FlutterMetalCompositor(FlutterViewController* view_controller)
+ : FlutterCompositor(view_controller) {}
+
+bool FlutterMetalCompositor::CreateBackingStore(const FlutterBackingStoreConfig* config,
+ FlutterBackingStore* backing_store_out) {
+ FML_CHECK(false) << "Not implemented, see issue: https://github.com/flutter/flutter/issues/81320";
+ return false;
+}
+bool FlutterMetalCompositor::CollectBackingStore(const FlutterBackingStore* backing_store) {
+ FML_CHECK(false) << "Not implemented, see issue: https://github.com/flutter/flutter/issues/81320";
+ return false;
+}
+
+bool FlutterMetalCompositor::Present(const FlutterLayer** layers, size_t layers_count) {
+ FML_CHECK(false) << "Not implemented, see issue: https://github.com/flutter/flutter/issues/81320";
+ return false;
+}
+
+} // namespace flutter
