def AddImplThreadRenderingStats(mock_timer,
thread,
first_frame,
ref_stats=None):
""" Adds a random impl thread rendering stats event.
thread: The timeline model thread to which the event will be added.
first_frame: Is this the first frame within the bounds of an action?
ref_stats: A ReferenceRenderingStats object to record expected values.
"""
# Create randonm data and timestap for impl thread rendering stats.
data = {
'frame_count': 1,
'rasterize_time': mock_timer.Advance(5, 10) / 1000.0,
'rasterized_pixel_count': 1280 * 720,
'visible_content_area': random.uniform(0, 100),
'approximated_visible_content_area': random.uniform(0, 5)
}
timestamp = mock_timer.Get()
# Add a slice with the event data to the given thread.
thread.PushCompleteSlice(
'benchmark',
'BenchmarkInstrumentation::ImplThreadRenderingStats',
timestamp,
duration=0.0,
thread_timestamp=None,
thread_duration=None,
args={'data': data})
if not ref_stats:
return
# Add timestamp only if a frame was output
if data['frame_count'] == 1:
if not first_frame:
# Add frame_time if this is not the first frame in within the bounds of an
# action.
prev_timestamp = ref_stats.frame_timestamps[-1][-1]
ref_stats.frame_times[-1].append(
round(timestamp - prev_timestamp, 2))
ref_stats.frame_timestamps[-1].append(timestamp)
ref_stats.rasterize_times[-1].append(data['rasterize_time'] * 1000.0)
ref_stats.rasterized_pixel_counts[-1].append(
data['rasterized_pixel_count'])
ref_stats.approximated_pixel_percentages[-1].append(
round(
DivideIfPossibleOrZero(data['approximated_visible_content_area'],
data['visible_content_area']) * 100.0, 3))
def Rate(numerator, denominator):
return DivideIfPossibleOrZero(numerator, denominator)