Only send update events when the view is visible

3 files changed, 11 insertions, 3 deletions

diff --git a/pugl/detail/mac.m b/pugl/detail/mac.m
index 22f8088..2ec4345 100644
--- a/pugl/detail/mac.m
+++ b/pugl/detail/mac.m
@@ -997,7 +997,10 @@ puglUpdate(PuglWorld* world, const double timeout)
 	for (size_t i = 0; i < world->numViews; ++i) {
 		PuglView* const view = world->views[i];
 
-		puglDispatchSimpleEvent(view, PUGL_UPDATE);
+		if ([[view->impl->drawView window] isVisible]) {
+			puglDispatchSimpleEvent(view, PUGL_UPDATE);
+		}
+
 		[view->impl->drawView displayIfNeeded];
 	}
 
diff --git a/pugl/detail/win.c b/pugl/detail/win.c
index 22a0a25..cb4dfad 100644
--- a/pugl/detail/win.c
+++ b/pugl/detail/win.c
@@ -828,7 +828,10 @@ puglUpdate(PuglWorld* world, double timeout)
 	}
 
 	for (size_t i = 0; i < world->numViews; ++i) {
-		puglDispatchSimpleEvent(world->views[i], PUGL_UPDATE);
+		if (world->views[i]->visible) {
+			puglDispatchSimpleEvent(world->views[i], PUGL_UPDATE);
+		}
+
 		UpdateWindow(world->views[i]->impl->hwnd);
 	}
 
diff --git a/pugl/detail/x11.c b/pugl/detail/x11.c
index 58451e9..5fc769d 100644
--- a/pugl/detail/x11.c
+++ b/pugl/detail/x11.c
@@ -749,7 +749,9 @@ flushExposures(PuglWorld* world)
 		PuglEvent* const configure = &view->impl->pendingConfigure;
 		PuglEvent* const expose    = &view->impl->pendingExpose;
 
-		puglDispatchSimpleEvent(view, PUGL_UPDATE);
+		if (view->visible) {
+			puglDispatchSimpleEvent(view, PUGL_UPDATE);
+		}
 
 		if (configure->type || expose->type) {
 			view->backend->enter(view, expose->type ? &expose->expose : NULL);