1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
content / public / browser / gpu_feature_checker.h [blame]
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_PUBLIC_BROWSER_GPU_FEATURE_CHECKER_H_
#define CONTENT_PUBLIC_BROWSER_GPU_FEATURE_CHECKER_H_
#include "base/functional/callback_forward.h"
#include "base/memory/ref_counted.h"
#include "content/common/content_export.h"
#include "gpu/config/gpu_feature_type.h"
namespace content {
// GpuFeatureChecker does an asynchronous lookup for a GpuFeatureType. It will
// keep itself alive (via being a refcounted object) until it calls the given
// |callback|. The feature check is not initiated (and a self-reference is not
// taken) until CheckGpuFeatureAvailability() is called. If the feature is
// already available, the |callback| may be called synchronously inside of the
// CheckGpuFeatureAvailability() call.
class GpuFeatureChecker : public base::RefCountedThreadSafe<GpuFeatureChecker> {
public:
using FeatureAvailableCallback =
base::OnceCallback<void(bool feature_available)>;
CONTENT_EXPORT static scoped_refptr<GpuFeatureChecker> Create(
gpu::GpuFeatureType feature,
FeatureAvailableCallback callback);
// Checks to see if |feature_| is available on the current GPU. |callback_|
// will be called to indicate the availability of the feature. It may be
// called synchronously if the data is already available, or else will be
// called asynchronously when it becomes available. This method must be called
// from the the UI thread.
// CheckGpuFeatureAvailability() may be called at most once for any given
// GpuFeatureChecker
virtual void CheckGpuFeatureAvailability() = 0;
protected:
friend class base::RefCountedThreadSafe<GpuFeatureChecker>;
virtual ~GpuFeatureChecker();
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_GPU_FEATURE_CHECKER_H_