ardour/livetrax
13
0
Fork 0
Code

break down GdkEventExpose into distinct rectangles for canvas expose rather than drawing the entire region as a single rect

Browse Source
This commit is contained in:
Paul Davis 2014-03-04 08:15:35 -05:00
parent 1c839ed541
commit fee026c5ef
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
libs/canvas/canvas.cc
View File

@ -607,9 +607,20 @@ bool
GtkCanvas::on_expose_event (GdkEventExpose* ev)
{
Cairo::RefPtr<Cairo::Context> cairo_context = get_window()->create_cairo_context ();
Rect area (ev->area.x, ev->area.y, ev->area.x + ev->area.width, ev->area.y + ev->area.height);
render (area, cairo_context);
/* break into regions */
GdkRectangle *rects;
gint n_rects;
gdk_region_get_rectangles (ev->region, &rects, &n_rects);
for (gint i = 0; i < n_rects; ++i) {
Rect area (rects[i].x, rects[i].y, rects[i].x + rects[i].width, rects[i].y + rects[i].height);
render (area, cairo_context);
}
g_free (rects);
return true;
}