| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef TOOLS_MAC_POWER_POWER_SAMPLER_MAIN_DISPLAY_SAMPLER_H_ |
| #define TOOLS_MAC_POWER_POWER_SAMPLER_MAIN_DISPLAY_SAMPLER_H_ |
| |
| #include <CoreGraphics/CoreGraphics.h> |
| |
| #include <memory> |
| #include <optional> |
| |
| #include "tools/mac/power/power_sampler/sampler.h" |
| |
| namespace power_sampler { |
| |
| // Samples the backlight level of the main display, if possible. |
| // Note that this sampler pretty much assumes that the computer under test has a |
| // single, built-in backlit display. |
| // Note also that this samples the set level of the backlight, which doesn't |
| // necessarily mean the display is lit at all. The sleeping flag will however |
| // reflect this. |
| class MainDisplaySampler : public Sampler { |
| public: |
| static constexpr char kSamplerName[] = "main_display"; |
| |
| ~MainDisplaySampler() override; |
| |
| // Creates and initializes a new sampler, if possible. |
| // Returns nullptr on failure. |
| static std::unique_ptr<MainDisplaySampler> Create(); |
| |
| // Sampler implementation. |
| std::string GetName() override; |
| DatumNameUnits GetDatumNameUnits() override; |
| Sample GetSample(base::TimeTicks sample_time) override; |
| |
| protected: |
| // Virtual for testing. |
| virtual std::optional<float> GetDisplayBrightness(); |
| virtual bool GetIsDisplaySleeping(); |
| |
| MainDisplaySampler(CGDirectDisplayID main_display); |
| |
| private: |
| const CGDirectDisplayID main_display_; |
| }; |
| |
| } // namespace power_sampler |
| |
| #endif // TOOLS_MAC_POWER_POWER_SAMPLER_MAIN_DISPLAY_SAMPLER_H_ |