Index: ui/base/cocoa/remote_layer_api.mm |
diff --git a/ui/base/cocoa/remote_layer_api.mm b/ui/base/cocoa/remote_layer_api.mm |
new file mode 100644 |
index 0000000000000000000000000000000000000000..93947dac3e38ec0741eedb5ee6d31f3c87187bde |
--- /dev/null |
+++ b/ui/base/cocoa/remote_layer_api.mm |
@@ -0,0 +1,43 @@ |
+// Copyright 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "ui/base/cocoa/remote_layer_api.h" |
+ |
+#include <objc/runtime.h> |
+ |
+namespace ui { |
+ |
+bool RemoteLayerAPISupported() { |
+ // Verify the GPU process interfaces are present. |
+ static Class caContextClass = NSClassFromString(@"CAContext"); |
+ if (!caContextClass) |
+ return false; |
+ |
+ // Note that because the contextId and layer properties are dynamic, |
+ // instancesRespondToSelector will return NO for them. |
+ static bool caContextClassValid = |
+ [caContextClass respondsToSelector: |
+ @selector(contextWithCGSConnection: options:)] && |
+ class_getProperty(caContextClass, "contextId") && |
+ class_getProperty(caContextClass, "layer"); |
+ if (!caContextClassValid) |
+ return false; |
+ |
+ // Verify the browser process interfaces are present. |
+ static Class caLayerHostClass = NSClassFromString(@"CALayerHost"); |
+ if (!caLayerHostClass) |
+ return false; |
+ |
+ static bool caLayerHostClassValid = |
+ [caLayerHostClass instancesRespondToSelector:@selector(contextId)] && |
+ [caLayerHostClass instancesRespondToSelector:@selector(setContextId:)]; |
+ if (!caLayerHostClassValid) |
+ return false; |
+ |
+ // If everything is there, we should be able to use the API. |
+ return true; |
+} |
+ |
+} // namespace |
+ |