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// 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 "base/command_line.h"
#include "base/mac/mac_util.h"
#include "ui/base/ui_base_switches.h"
#include <objc/runtime.h>
namespace ui {
bool RemoteLayerAPISupported() {
// This API only works on Mac OS 10.9 and later.
if (!base::mac::IsOSMavericksOrLater())
return false;
bool disabled_at_command_line =
base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableRemoteCoreAnimation);
if (disabled_at_command_line)
return false;
// 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
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