1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/base/cocoa/remote_layer_api.h" 6 7 #include "base/command_line.h" 8 #include "ui/base/ui_base_switches.h" 9 10 #include <objc/runtime.h> 11 12 namespace ui { 13 14 bool RemoteLayerAPISupported() { 15 bool enabled_at_command_line = 16 CommandLine::ForCurrentProcess()->HasSwitch( 17 switches::kEnableRemoteCoreAnimation); 18 if (!enabled_at_command_line) 19 return false; 20 21 // Verify the GPU process interfaces are present. 22 static Class caContextClass = NSClassFromString(@"CAContext"); 23 if (!caContextClass) 24 return false; 25 26 // Note that because the contextId and layer properties are dynamic, 27 // instancesRespondToSelector will return NO for them. 28 static bool caContextClassValid = 29 [caContextClass respondsToSelector: 30 @selector(contextWithCGSConnection:options:)] && 31 class_getProperty(caContextClass, "contextId") && 32 class_getProperty(caContextClass, "layer"); 33 if (!caContextClassValid) 34 return false; 35 36 // Verify the browser process interfaces are present. 37 static Class caLayerHostClass = NSClassFromString(@"CALayerHost"); 38 if (!caLayerHostClass) 39 return false; 40 41 static bool caLayerHostClassValid = 42 [caLayerHostClass instancesRespondToSelector:@selector(contextId)] && 43 [caLayerHostClass instancesRespondToSelector:@selector(setContextId:)]; 44 if (!caLayerHostClassValid) 45 return false; 46 47 // If everything is there, we should be able to use the API. 48 return true; 49 } 50 51 } // namespace 52 53
