diff options
| author | Tim Mayberry <mojofunk@gmail.com> | 2017-03-28 15:52:28 +1000 |
|---|---|---|
| committer | Tim Mayberry <mojofunk@gmail.com> | 2017-06-26 08:40:47 +1000 |
| commit | 4ddf97f5a2b505997935a1079f2fd9232c1f634e (patch) | |
| tree | 41f9b9aa005f81d1e6344947ce94347ea57c4ff6 /libs/canvas/canvas.cc | |
| parent | ab13e87ec2f61489bbbb52ade6c3f9a1b67a0e1b (diff) | |
Add Canvas::get_microseconds_since_render_start() method
Initial use is for the WaveView class to determine whether on not to draw the
waveform in the GUI thread.
Diffstat (limited to 'libs/canvas/canvas.cc')
| -rw-r--r-- | libs/canvas/canvas.cc | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libs/canvas/canvas.cc b/libs/canvas/canvas.cc index a004d64ad3..47784626aa 100644 --- a/libs/canvas/canvas.cc +++ b/libs/canvas/canvas.cc @@ -163,6 +163,18 @@ Canvas::prepare_for_render (Rect const & area) const } } +gint64 +Canvas::get_microseconds_since_render_start () const +{ + gint64 timestamp = g_get_monotonic_time(); + + if (_last_render_start_timestamp == 0 || timestamp <= _last_render_start_timestamp) { + return 0; + } + + return timestamp - _last_render_start_timestamp; +} + ostream& operator<< (ostream& o, Canvas& c) { |