Crapola - this is an experimental performance hack that must be reverted.

gtk2_ardour/audio_region_view.cc

@@ -231,23 +231,24 @@ AudioRegionView::init (bool wfd)
 	}
 
 	const string line_name = _region->name() + ":gain";
+
 	gain_line.reset (new AudioRegionGainLine (line_name, *this, *group, audio_region()->envelope()));
 
 	update_envelope_visibility ();
 	gain_line->reset ();
 
-	set_height (trackview.current_height()); // XXX not correct for Layered mode, but set_height() will fix later.
+	/* streamview will call set_height() */
+	//set_height (trackview.current_height()); // XXX not correct for Layered mode, but set_height() will fix later.
 
 	region_muted ();
 	region_sync_changed ();
 
 	region_resized (ARDOUR::bounds_change);
+	/* region_resized sets ghost region duration */
 
-	for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
+	/* region_locked is a synonym for region_renamed () which is called in region_muted() above */
-		(*i)->set_duration (_region->length() / samples_per_pixel);
+	//region_locked ();
-	}
 
-	region_locked ();
 	envelope_active_changed ();
 	fade_in_active_changed ();
 	fade_out_active_changed ();
@@ -274,15 +275,14 @@ AudioRegionView::init (bool wfd)
 
 	setup_waveform_visibility ();
 
-	pending_peak_data->raise_to_top ();
+	/* reset_width_dependent_items() does this:
-
 	if (frame_handle_start) {
 		frame_handle_start->raise_to_top ();
 	}
 	if (frame_handle_end) {
 		frame_handle_end->raise_to_top ();
 	}
-
+	*/
 	/* XXX sync mark drag? */
 }
 
@@ -449,6 +449,10 @@ AudioRegionView::region_resized (const PropertyChange& what_changed)
 void
 AudioRegionView::reset_width_dependent_items (double pixel_width)
 {
+	if (pixel_width == _width) {
+		return;
+	}
+
 	RegionView::reset_width_dependent_items(pixel_width);
 	assert(_pixel_width == pixel_width);
 
@@ -530,6 +534,10 @@ AudioRegionView::setup_fade_handle_positions()
 void
 AudioRegionView::set_height (gdouble height)
 {
+	if (height == _height) {
+		return;
+	}
+
 	RegionView::set_height (height);
 	pending_peak_data->set_y1 (height);
 

gtk2_ardour/midi_region_view.cc

@@ -271,12 +271,12 @@ MidiRegionView::init (bool wfd)
 
 	RegionView::init (false);
 
-	set_height (trackview.current_height());
+	//set_height (trackview.current_height());
 
 	region_muted ();
 	region_sync_changed ();
 	region_resized (ARDOUR::bounds_change);
-	region_locked ();
+	//region_locked ();
 
 	set_colors ();
 

gtk2_ardour/region_view.cc

@@ -178,13 +178,14 @@ RegionView::init (bool wfd)
 		_enable_display = true;
 	}
 
-	set_height (trackview.current_height());
+	/* derived class calls set_height () including RegionView::set_height() in ::init() */
+	//set_height (trackview.current_height());
 
 	_region->PropertyChanged.connect (*this, invalidator (*this), boost::bind (&RegionView::region_changed, this, _1), gui_context());
 
-	set_colors ();
+	/* derived class calls set_colors () including RegionView::set_colors() in ::init() */
-
+	//set_colors ();
-	UIConfiguration::instance().ColorsChanged.connect (sigc::mem_fun (*this, &RegionView::color_handler));
+	//UIConfiguration::instance().ColorsChanged.connect (sigc::mem_fun (*this, &RegionView::color_handler));
 
 	/* XXX sync mark drag? */
 }
@@ -588,7 +589,6 @@ RegionView::region_renamed ()
 
 	set_item_name (str, this);
 	set_name_text (str);
-	reset_width_dependent_items (_pixel_width);
 }
 
 void
@@ -775,18 +775,11 @@ RegionView::update_coverage_frames (LayerDisplay d)
 	/* the color that will be used to show parts of regions that will not be heard */
 	uint32_t const non_playing_color = UIConfiguration::instance().color_mod ("covered region", "covered region base");
 
-	while (t < end) {
+	t = pl->find_next_region_boundary (t, 1);
-
-		t++;
 
 	/* is this region is on top at time t? */
 	bool const new_me = (pl->top_unmuted_region_at (t) == _region);
 
-		/* finish off any old rect, if required */
-		if (cr && me != new_me) {
-			cr->set_x1 (trackview.editor().sample_to_pixel (t - position));
-		}
-
 	/* start off any new rect, if required */
 	if (cr == 0 || me != new_me) {
 		cr = new ArdourCanvas::Rectangle (group);
@@ -803,13 +796,6 @@ RegionView::update_coverage_frames (LayerDisplay d)
 		}
 	}
 
-		t = pl->find_next_region_boundary (t, 1);
-		if (t < 0) {
-			break;
-		}
-		me = new_me;
-	}
-
 	if (cr) {
 		/* finish off the last rectangle */
 		cr->set_x1 (trackview.editor().sample_to_pixel (end - position));

gtk2_ardour/streamview.cc

@@ -119,7 +119,7 @@ StreamView::set_height (double h)
 		return -1;
 	}
 
-	if (canvas_rect->y1() == h) {
+	if (height == h) {
 		return 0;
 	}
 
@@ -139,6 +139,10 @@ StreamView::set_samples_per_pixel (double fpp)
 		return -1;
 	}
 
+	if (fpp == _samples_per_pixel) {
+		return 0;
+	}
+
 	_samples_per_pixel = fpp;
 
 	for (i = region_views.begin(); i != region_views.end(); ++i) {
@@ -292,7 +296,8 @@ StreamView::playlist_layered (boost::weak_ptr<Track> wtr)
 
 	if (_layer_display == Stacked) {
 		update_contents_height ();
-		update_coverage_frames ();
+		/* tricky. playlist_changed() does this as well, and its really inefficient. */
+		//update_coverage_frames ();
 	} else {
 		/* layering has probably been modified. reflect this in the canvas. */
 		layer_regions();
@@ -311,12 +316,12 @@ StreamView::playlist_switched (boost::weak_ptr<Track> wtr)
 	/* disconnect from old playlist */
 
 	playlist_connections.drop_connections ();
-	undisplay_track ();
+	//undisplay_track ();
 
 	/* draw it */
-
+	tr->playlist()->freeze();
 	redisplay_track ();
-
+	tr->playlist()->thaw();
 	/* update layers count and the y positions and heights of our regions */
 	_layers = tr->playlist()->top_layer() + 1;
 	update_contents_height ();

gtk2_ardour/time_axis_view_item.cc

@@ -160,7 +160,6 @@ TimeAxisViewItem::init (ArdourCanvas::Item* parent, double fpp, uint32_t base_co
 {
 	group = new ArdourCanvas::Container (parent);
 	CANVAS_DEBUG_NAME (group, string_compose ("TAVI group for %1", get_item_name()));
-	group->Event.connect (sigc::mem_fun (*this, &TimeAxisViewItem::canvas_group_event));
 
 	fill_color = base_color;
 	fill_color_name = "time axis view item base";
@@ -247,13 +246,14 @@ TimeAxisViewItem::init (ArdourCanvas::Item* parent, double fpp, uint32_t base_co
 		frame_handle_start = frame_handle_end = 0;
 	}
 
-	set_color (base_color);
+	//set_color (base_color);
 
-	set_duration (item_duration, this);
+	//set_duration (item_duration, this);
-	set_position (start, this);
+	//set_position (start, this);
 
-	Config->ParameterChanged.connect (*this, invalidator (*this), boost::bind (&TimeAxisViewItem::parameter_changed, this, _1), gui_context ());
+	group->Event.connect (sigc::mem_fun (*this, &TimeAxisViewItem::canvas_group_event));
-	UIConfiguration::instance().ParameterChanged.connect (sigc::mem_fun (*this, &TimeAxisViewItem::parameter_changed));
+	//Config->ParameterChanged.connect (*this, invalidator (*this), boost::bind (&TimeAxisViewItem::parameter_changed, this, _1), gui_context ());
+	//UIConfiguration::instance().ParameterChanged.connect (sigc::mem_fun (*this, &TimeAxisViewItem::parameter_changed));
 }
 
 TimeAxisViewItem::~TimeAxisViewItem()
@@ -532,7 +532,7 @@ TimeAxisViewItem::set_name_text(const string& new_name)
 	name_text_width = pixel_width (new_name, NAME_FONT) + 2;
 	name_text->set (new_name);
 	manage_name_text ();
-
+	manage_name_highlight ();
 }
 
 /**
@@ -569,8 +569,6 @@ TimeAxisViewItem::set_height (double height)
 			selection_frame->set (frame->get().shrink (1.0));
 		}
 	}
-
-	set_colors ();
 }
 
 void

gtk2_ardour/time_axis_view_item.h

@@ -235,9 +235,9 @@ class TimeAxisViewItem : public Selectable, public PBD::ScopedConnectionList
 	bool _recregion;
 	bool _automation; ///< true if this is an automation region view
 	bool _dragging;
+        double _width;
 
 private:
-        double _width;
 
 	void parameter_changed (std::string);
         void manage_name_highlight ();

gtk2_ardour/time_info_box.cc

@@ -187,7 +187,7 @@ TimeInfoBox::region_property_change (boost::shared_ptr<ARDOUR::Region> /* r */,
 	 * RegionView (not Region itself).
 	 */
 
-	selection_changed ();
+	//selection_changed ();
 }
 
 bool

libs/ardour/playlist.cc

@@ -1822,6 +1822,7 @@ Playlist::regions_at (framepos_t frame)
 	 for (RegionList::iterator i = rlist->begin(); i != rlist->end(); ) {
 
 		 RegionList::iterator tmp = i;
+
 		 ++tmp;
 
 		 if ((*i)->muted()) {
@@ -2047,23 +2048,25 @@ Playlist::find_next_region (framepos_t frame, RegionPoint point, int dir)
 
 			 boost::shared_ptr<Region> r = (*i);
 			 frameoffset_t distance;
+			 const framepos_t first_frame = r->first_frame();
+			 const framepos_t last_frame = r->last_frame();
 
-			 if (r->first_frame() > frame) {
+			 if (first_frame > frame) {
 
-				 distance = r->first_frame() - frame;
+				 distance = first_frame - frame;
 
 				 if (distance < closest) {
-					 ret = r->first_frame();
+					 ret = first_frame;
 					 closest = distance;
 				 }
 			 }
 
-			 if (r->last_frame () > frame) {
+			 if (last_frame > frame) {
 
-				 distance = r->last_frame () - frame;
+				 distance = last_frame - frame;
 
 				 if (distance < closest) {
-					 ret = r->last_frame ();
+					 ret = last_frame;
 					 closest = distance;
 				 }
 			 }
@@ -2075,23 +2078,25 @@ Playlist::find_next_region (framepos_t frame, RegionPoint point, int dir)
 
 			 boost::shared_ptr<Region> r = (*i);
 			 frameoffset_t distance;
+			 const framepos_t first_frame = r->first_frame();
+			 const framepos_t last_frame = r->last_frame();
 
-			 if (r->last_frame() < frame) {
+			 if (last_frame < frame) {
 
-				 distance = frame - r->last_frame();
+				 distance = frame - last_frame;
 
 				 if (distance < closest) {
-					 ret = r->last_frame();
+					 ret = last_frame;
 					 closest = distance;
 				 }
 			 }
 
-			 if (r->first_frame() < frame) {
+			 if (first_frame < frame) {
 
-				 distance = frame - r->first_frame();
+				 distance = frame - first_frame;
 
 				 if (distance < closest) {
-					 ret = r->first_frame();
+					 ret = first_frame;
 					 closest = distance;
 				 }
 			 }
@@ -2899,6 +2904,7 @@ Playlist::update_after_tempo_map_change ()
 	}
 
 	thaw ();
+	notify_contents_changed();
 }
 
 void

libs/canvas/text.cc

@@ -70,6 +70,10 @@ Text::~Text ()
 void
 Text::set (string const & text)
 {
+	if (text == _text) {
+		return;
+	}
+
 	begin_change ();
 
 	_text = text;
@@ -237,6 +241,10 @@ Text::compute_bounding_box () const
 void
 Text::set_alignment (Pango::Alignment alignment)
 {
+	if (alignment == _alignment) {
+		return;
+	}
+
 	begin_change ();
 
 	_alignment = alignment;
@@ -261,6 +269,10 @@ Text::set_font_description (Pango::FontDescription font_description)
 void
 Text::set_color (Color color)
 {
+	if (color == _color) {
+		return;
+	}
+
 	begin_change ();
 
 	_color = color;