properly notify Cairo when drawing a gradient to a ThresholdAdjuster

Candidate fix for #3769
2017-05-05 16:43:08 +02:00 · 2017-05-05 16:43:08 +02:00 · 8ae641952f
commit 8ae641952f
parent b30367947f
1 changed files with 4 additions and 0 deletions
--- a/rtgui/coloredbar.cc
+++ b/rtgui/coloredbar.cc
@ -131,6 +131,8 @@ void ColoredBar::updateBackBuffer(Gtk::DrawingArea &drawingArea)
        } else {
            // ask the ColorProvider to provide colors :) for each pixels
            if (colorProvider) {
+                surface->flush();
+                
                unsigned char *surfaceData = surface->get_data();

                cr->set_antialias(Cairo::ANTIALIAS_NONE);
@ -202,6 +204,8 @@ void ColoredBar::updateBackBuffer(Gtk::DrawingArea &drawingArea)

                    break;
                }
+
+                surface->mark_dirty();
            }
        }