make canvas text scale with font scaler; prevent bogus values from putting NaN's into automation lines

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@3118 d708f5d6-7413-0410-9779-e7cbd77b26cf

SConstruct

@@ -562,6 +562,9 @@ libraries['glib2'].ParseConfig ('pkg-config --cflags --libs gobject-2.0')
 libraries['glib2'].ParseConfig ('pkg-config --cflags --libs gmodule-2.0')
 libraries['glib2'].ParseConfig ('pkg-config --cflags --libs gthread-2.0')
 
+libraries['freetype2'] = LibraryInfo()
+libraries['freetype2'].ParseConfig ('pkg-config --cflags --libs freetype2')
+
 libraries['gtk2'] = LibraryInfo()
 libraries['gtk2'].ParseConfig ('pkg-config --cflags --libs gtk+-2.0')
 

gtk2_ardour/SConscript

@@ -34,6 +34,7 @@ gtkardour.Merge ([
     libraries['fftw3'],
     libraries['fftw3f'],
     libraries['flac'],
+    libraries['freetype2'],
     libraries['gdkmm2'],
     libraries['glib2'],
     libraries['glibmm2'],

gtk2_ardour/audio_region_view.cc

@@ -142,7 +142,7 @@ AudioRegionView::init (Gdk::Color& basic_color, bool wfd)
 	}
 
 	compute_colors (basic_color);
-
+	
 	create_waves ();
 
 	fade_in_shape = new ArdourCanvas::Polygon (*group);
@@ -763,7 +763,7 @@ AudioRegionView::set_envelope_visible (bool yn)
 void
 AudioRegionView::create_waves ()
 {
-	//cerr << "AudioRegionView::create_waves() called on " << this << endl;//DEBUG
+	// cerr << "AudioRegionView::create_waves() called on " << this << endl;//DEBUG
 	RouteTimeAxisView& atv (*(dynamic_cast<RouteTimeAxisView*>(&trackview))); // ick
 
 	if (!atv.get_diskstream()) {

gtk2_ardour/audio_region_view.h

@@ -62,6 +62,8 @@ class AudioRegionView : public RegionView
 	
 	boost::shared_ptr<ARDOUR::AudioRegion> audio_region() const;
 	
+	void create_waves ();
+
 	void set_height (double);
 	void set_samples_per_unit (double);
 	
@@ -132,7 +134,6 @@ class AudioRegionView : public RegionView
     void region_muted ();
     void region_scale_amplitude_changed ();
 
-    void create_waves ();
     void create_one_wave (uint32_t, bool);
     void manage_zero_line ();
     void peaks_ready_handler (uint32_t);

gtk2_ardour/audio_streamview.cc

@@ -434,8 +434,9 @@ AudioStreamView::set_show_waveforms (bool yn)
 {
 	for (list<RegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
 		AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*i);
-		if (arv)
+		if (arv) {
 			arv->set_waveform_visible (yn);
+		}
 	}
 }
 

gtk2_ardour/audio_time_axis.cc

@@ -115,10 +115,10 @@ AudioTimeAxisView::AudioTimeAxisView (PublicEditor& ed, Session& sess, boost::sh
 		_view->RegionViewAdded.connect (mem_fun(*this, &AudioTimeAxisView::region_view_added));
 
 		if (!editor.have_idled()) {
-			/* first idle will do the rest */
+			/* first idle will do what we need */
 		} else {
 			first_idle ();
-		}
+		} 
 
 	} else {
 		post_construct ();

gtk2_ardour/automation_gain_line.cc

@@ -51,6 +51,8 @@ AutomationGainLine::view_to_model_y (double& y)
 void
 AutomationGainLine::model_to_view_y (double& y)
 {
+	if (y < 0) y = 0;
+	
 	y = gain_to_slider_position (y);
 }
 

gtk2_ardour/automation_line.cc

@@ -605,6 +605,12 @@ AutomationLine::determine_visible_control_points (ALPoints& points)
 
 		double tx = points[pi].x;
 		double ty = points[pi].y;
+		
+		if (isnan (tx) || isnan (ty)) {
+			warning << string_compose (_("Ignoring illegal points on AutomationLine \"%1\""),
+						   _name) << endmsg;
+			continue;
+		}
 
 		/* now ensure that the control_points vector reflects the current curve
 		   state, but don't plot control points too close together. also, don't
@@ -1198,7 +1204,7 @@ AutomationLine::reset_callback (const AutomationList& events)
 	AutomationList::const_iterator ai;
 
 	for (ai = events.const_begin(); ai != events.const_end(); ++ai) {
-
+		
 		double translated_y = (*ai)->value;
 		model_to_view_y (translated_y);
 

gtk2_ardour/option_editor.cc

@@ -16,6 +16,8 @@
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
 */
+#include <pango/pangoft2.h> // for fontmap resolution control for GnomeCanvas
+#include <pango/pangocairo.h> // for fontmap resolution control for GnomeCanvas
 
 #include <pbd/whitespace.h>
 
@@ -253,8 +255,20 @@ OptionEditor::add_session_paths ()
 static void
 reset_dpi ()
 {
+	long val = Config->get_font_scale();
+
+	/* FT2 rendering */
+
+	pango_ft2_font_map_set_resolution ((PangoFT2FontMap*) pango_ft2_font_map_for_display(), val/1024, val/1024);
+
+	/* Cairo rendering, in case there is any */
+	
+	pango_cairo_font_map_set_resolution ((PangoCairoFontMap*) pango_cairo_font_map_get_default(), val/1024);
+	
+	/* Xft rendering */
+
 	gtk_settings_set_long_property (gtk_settings_get_default(),
-					"gtk-xft-dpi", Config->get_font_scale(), "ardour");
+					"gtk-xft-dpi", val, "ardour");
 }
 
 static void

gtk2_ardour/region_gain_line.cc

@@ -59,6 +59,8 @@ AudioRegionGainLine::view_to_model_y (double& y)
 void
 AudioRegionGainLine::model_to_view_y (double& y)
 {
+	if (y < 0) y == 0;
+
 	y = gain_to_slider_position (y);
 }
 

libs/ardour/session_state.cc

@@ -1638,7 +1638,8 @@ Session::XMLSourceFactory (const XMLNode& node)
 	}
 
 	try {
-		return SourceFactory::create (*this, node);
+		/* note: do peak building in another thread when loading session state */
+		return SourceFactory::create (*this, node, true);
 	}
 
 	catch (failed_constructor& err) {

libs/ardour/source_factory.cc

@@ -23,6 +23,7 @@
 #include <pbd/error.h>
 #include <pbd/convert.h>
 #include <pbd/pthread_utils.h>
+#include <pbd/stacktrace.h>
 
 #include <ardour/source_factory.h>
 #include <ardour/sndfilesource.h>

libs/libgnomecanvasmm/libgnomecanvasmm/text.cc

@@ -25,6 +25,22 @@
  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <gtk/gtksettings.h>
+#include <glib-object.h>
+
+static void 
+_catch_xft_dpi (GObject* thing, gpointer val, gpointer arg)
+{
+	GnomeCanvasText* text = (GnomeCanvasText*) arg;
+	gchar *txt;
+
+	g_object_get (G_OBJECT(text), "text", &txt, NULL);
+
+	if (txt && txt[0] != '\0') {
+		g_object_set (G_OBJECT(text), "text", txt, NULL);
+	}
+}
+
 namespace Gnome
 {
 
@@ -36,12 +52,14 @@ Text::Text(Group& parentx, double x, double y, const Glib::ustring& text)
 {
   item_construct(parentx);
   set("x", x, "y", y, "text", text.c_str(), 0);
+  g_signal_connect (gtk_settings_get_default(), "notify::gtk-xft-dpi", (GCallback) _catch_xft_dpi, gobj());
 }
 
 Text::Text(Group& parentx)
   : Item(GNOME_CANVAS_ITEM(g_object_new(get_type(), 0)))
 {
   item_construct(parentx);
+  g_signal_connect (gtk_settings_get_default(), "notify::gtk-xft-dpi", (GCallback) _catch_xft_dpi, gobj());
 }
 
 } /* namespace Canvas */
@@ -113,13 +131,13 @@ Text::Text(const Glib::ConstructParams& construct_params)
 :
   Item(construct_params)
 {
-  }
+}
 
 Text::Text(GnomeCanvasText* castitem)
 :
   Item((GnomeCanvasItem*)(castitem))
 {
-  }
+}
 
 Text::~Text()
 {