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Side by Side Diff: gpu/command_buffer/service/gpu_timing.h

Issue 935333002: Update from https://crrev.com/316786 (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 10 months ago
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1 // Copyright (c) 2015 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 #ifndef GPU_COMMAND_BUFFER_SERVICE_GPU_TIMING_H_
6 #define GPU_COMMAND_BUFFER_SERVICE_GPU_TIMING_H_
7
8 #include "base/callback.h"
9 #include "base/memory/scoped_ptr.h"
10 #include "gpu/gpu_export.h"
11 #include "ui/gl/gl_bindings.h"
12
13 namespace gpu {
14
15 class GPUTiming;
16
17 // Class to compute the amount of time it takes to fully
18 // complete a set of GL commands
19 class GPU_EXPORT GPUTimer {
20 public:
21 // gpu_timing must outlive GPUTimer instance we're creating.
22 explicit GPUTimer(GPUTiming* gpu_timing);
23 ~GPUTimer();
24
25 void Start();
26 void End();
27 bool IsAvailable();
28
29 void GetStartEndTimestamps(int64* start, int64* end);
30 int64 GetDeltaElapsed();
31
32 private:
33 GLuint queries_[2];
34 int64 offset_ = 0;
35 bool end_requested_ = false;
36 GPUTiming* gpu_timing_;
37
38 DISALLOW_COPY_AND_ASSIGN(GPUTimer);
39 };
40
41 // GPUTiming contains all the gl timing logic that is not specific
42 // to a single GPUTimer.
43 class GPU_EXPORT GPUTiming {
44 public:
45 enum TimerType {
46 kTimerTypeInvalid = -1,
47
48 kTimerTypeARB, // ARB_timer_query
49 kTimerTypeDisjoint // EXT_disjoint_timer_query
50 };
51
52 GPUTiming();
53 virtual ~GPUTiming();
54
55 bool Initialize(gfx::GLContext* context);
56 bool IsAvailable();
57
58 // CheckAndResetTimerErrors has to be called before reading timestamps
59 // from GPUTimers instances and after making sure all the timers
60 // were available.
61 // If the returned value is false, all the previous timers should be
62 // discarded.
63 bool CheckAndResetTimerErrors();
64
65 const char* GetTimerTypeName() const;
66
67 // Returns the offset between the current gpu time and the cpu time.
68 int64 CalculateTimerOffset();
69 void InvalidateTimerOffset();
70
71 void SetCpuTimeForTesting(const base::Callback<int64(void)>& cpu_time);
72 void SetOffsetForTesting(int64 offset, bool cache_it);
73 void SetTimerTypeForTesting(TimerType type);
74
75 private:
76 TimerType timer_type_ = kTimerTypeInvalid;
77 int64 offset_ = 0; // offset cache when timer_type_ == kTimerTypeARB
78 bool offset_valid_ = false;
79 base::Callback<int64(void)> cpu_time_for_testing_;
80 friend class GPUTimer;
81 DISALLOW_COPY_AND_ASSIGN(GPUTiming);
82 };
83 } // namespace gpu
84
85 #endif // GPU_COMMAND_BUFFER_SERVICE_GPU_TIMING_H_
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