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Move the "current frame" marker in the perf graph

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This commit is contained in:
Hixie 2016-03-18 13:09:33 -07:00
parent f59aae0397
commit b105feb361
1 changed files with 7 additions and 4 deletions
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11
engine/src/flutter/flow/instrumentation.cc
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@ -80,7 +80,8 @@ void Stopwatch::visualize(SkCanvas& canvas, const SkRect& rect) const {
// Prepare a path for the data.
// we start at the height of the last point, so it looks like we wrap around
SkPath path;
const double sampleMarginUnitWidth = (1.0 / kMaxSamples) / 6.0;
const double sampleUnitWidth = (1.0 / kMaxSamples);
const double sampleMarginUnitWidth = sampleUnitWidth / 6.0;
const double sampleMarginWidth = width * sampleMarginUnitWidth;
path.moveTo(x, bottom);
path.lineTo(x, y + height * (1.0 - UnitHeight(_laps[0].InMillisecondsF(),
@ -127,7 +128,9 @@ void Stopwatch::visualize(SkCanvas& canvas, const SkRect& rect) const {
}
}
// Paint the vertical marker for the last frame.
// Paint the vertical marker for the current frame.
// We paint it over the current frame, not after it, because when we
// paint this we don't yet have all the times for the current frame.
paint.setStyle(SkPaint::Style::kFill_Style);
if (UnitFrameInterval(lastLap().InMillisecondsF()) > 1.0) {
// budget exceeded
@ -136,9 +139,9 @@ void Stopwatch::visualize(SkCanvas& canvas, const SkRect& rect) const {
// within budget
paint.setColor(SK_ColorGREEN);
}
double sampleX = x + width * (static_cast<double>(_current_sample + 1) / kMaxSamples)
double sampleX = x + width * (static_cast<double>(_current_sample) / kMaxSamples)
- sampleMarginWidth;
canvas.drawRectCoords(sampleX, y, sampleX + sampleMarginWidth * 2.0, bottom, paint);
canvas.drawRectCoords(sampleX, y, sampleX + width * sampleUnitWidth + sampleMarginWidth * 2, bottom, paint);
}
Stopwatch::~Stopwatch() = default;