mirror of https://github.com/yshui/picom.git
31 lines
1.2 KiB
C
31 lines
1.2 KiB
C
#pragma once
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#include "utils.h"
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#define NTIERS (3)
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struct render_statistics {
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/// Rolling window of rendering times (in us) and the tiers they belong to.
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/// We keep track of the tiers because the vblank time estimate can change over
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/// time.
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struct rolling_window render_times;
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/// Estimate the 95-th percentile of rendering times
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struct rolling_quantile render_time_quantile;
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/// Time between each vblanks
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struct cumulative_mean_and_var vblank_time_us;
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};
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void render_statistics_init(struct render_statistics *rs, int window_size);
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void render_statistics_reset(struct render_statistics *rs);
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void render_statistics_destroy(struct render_statistics *rs);
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void render_statistics_add_vblank_time_sample(struct render_statistics *rs, int time_us);
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void render_statistics_add_render_time_sample(struct render_statistics *rs, int time_us);
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/// How much time budget we should give to the backend for rendering, in microseconds.
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unsigned int render_statistics_get_budget(struct render_statistics *rs);
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/// Return the measured vblank interval in microseconds. Returns 0 if not enough
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/// samples have been collected yet.
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unsigned int render_statistics_get_vblank_time(struct render_statistics *rs);
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