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Suppress unnecessary updates to scope back buffer

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Upon the resize signal, the scope back buffers were redrawn, even if
there was no actual change to the size. This commit checks the size and
only updates the back buffers if the size changed.
This commit is contained in:
Lawrence Lee 2020-10-10 12:11:59 -07:00
parent c335e7ba24
commit ee1c85879d
1 changed files with 10 additions and 3 deletions
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13
rtgui/histogrampanel.cc
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@ -403,14 +403,19 @@ void HistogramPanel::showRGBBar()
void HistogramPanel::resized (Gtk::Allocation& req)
{
static int old_height = 0;
static int old_width = 0;
if (!histogramArea->updatePending()) {
bool size_changed =
old_height != req.get_height() || old_width != req.get_width();
if (!histogramArea->updatePending() && size_changed) {
histogramArea->updateBackBuffer ();
histogramArea->queue_draw ();
}
// set histogramRGBArea invalid;
if (histogramRGBArea) {
if (histogramRGBArea && size_changed) {
histogramRGBArea->updateBackBuffer(-1, -1, -1);
histogramRGBArea->queue_draw ();
}
@ -418,6 +423,8 @@ void HistogramPanel::resized (Gtk::Allocation& req)
// Store current height of the histogram
options.histogramHeight = get_height();
old_height = req.get_height();
old_width = req.get_width();
}
void HistogramPanel::red_toggled ()
@ -589,7 +596,7 @@ void HistogramPanel::rgbv_toggled ()
if (histogramRGBArea) {
updateHistRGBAreaOptions();
histogramRGBArea->updateBackBuffer (0, 0, 0);
histogramRGBArea->updateBackBuffer(-1, -1, -1);
histogramRGBArea->queue_draw ();
}
}