Add DSP-load & x-run widget to the toolbar.

1 files changed, 162 insertions, 0 deletions

diff --git a/gtk2_ardour/dsp_load_indicator.cc b/gtk2_ardour/dsp_load_indicator.cc
new file mode 100644
index 0000000000..bf033b7b32
--- /dev/null
+++ b/gtk2_ardour/dsp_load_indicator.cc
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2017 Robin Gareus <robin@gareus.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "gtkmm2ext/utils.h"
+#include "widgets/tooltips.h"
+
+#include "ardour_ui.h"
+#include "dsp_load_indicator.h"
+#include "ui_config.h"
+
+#include "pbd/i18n.h"
+
+#define PADDING 3
+
+DspLoadIndicator::DspLoadIndicator ()
+	: _dsp_load (0)
+	, _xrun_count (0)
+{
+	_layout = Pango::Layout::create (get_pango_context ());
+	_layout->set_text ("99.9%");
+}
+
+DspLoadIndicator::~DspLoadIndicator ()
+{
+}
+
+void
+DspLoadIndicator::on_size_request (Gtk::Requisition* req)
+{
+	req->width = req->height = 0;
+	CairoWidget::on_size_request (req);
+
+	int w, h;
+	_layout->get_pixel_size (w, h);
+
+	req->width = std::max (req->width, std::max (12, h + PADDING));
+	req->height = std::max (req->height, 20 /*std::max (20, w + PADDING) */);
+}
+
+void
+DspLoadIndicator::set_xrun_count (const unsigned int xruns)
+{
+	if (xruns == _xrun_count) {
+		return;
+	}
+	_xrun_count = xruns;
+	queue_draw ();
+	update_tooltip ();
+}
+
+void
+DspLoadIndicator::set_dsp_load (const double load)
+{
+	if (load == _dsp_load) {
+		return;
+	}
+	_dsp_load = load;
+
+	char buf[64];
+	snprintf (buf, sizeof (buf), "%.1f%%", _dsp_load);
+	_layout->set_text (buf);
+
+	queue_draw ();
+	update_tooltip ();
+}
+
+void
+DspLoadIndicator::update_tooltip ()
+{
+	char buf[64];
+	if (_xrun_count == UINT_MAX) {
+		snprintf (buf, sizeof (buf), _("DSP: %.1f%% X: ?"), _dsp_load);
+	} else if (_xrun_count > 9999) {
+		snprintf (buf, sizeof (buf), _("DSP: %.1f%% X: >10k"), _dsp_load);
+	} else {
+		snprintf (buf, sizeof (buf), _("DSP: %.1f%% X: %u"), _dsp_load, _xrun_count);
+	}
+	ArdourWidgets::set_tooltip (*this, buf);
+}
+
+void
+DspLoadIndicator::render (Cairo::RefPtr<Cairo::Context> const& ctx, cairo_rectangle_t*)
+{
+	cairo_t* cr = ctx->cobj ();
+	Gtkmm2ext::Color base = UIConfiguration::instance ().color ("ruler base");
+	Gtkmm2ext::Color text = UIConfiguration::instance ().color ("ruler text");
+
+	const int width = get_width ();
+	const int height = get_height ();
+
+	Gtkmm2ext::rounded_rectangle (cr, 0, 0, width, height, PADDING + 1);
+	Gtkmm2ext::set_source_rgba (cr, base);
+	cairo_fill (cr);
+
+	if (_xrun_count > 0) {
+		Gtkmm2ext::rounded_rectangle (cr, 1, 1, width - 2, height - 2, PADDING + 1);
+		cairo_set_source_rgba (cr, 0.5, 0, 0, 1.0);
+		cairo_fill (cr);
+	}
+
+	Gtkmm2ext::rounded_rectangle (cr, PADDING, PADDING, width - PADDING - PADDING, height - PADDING - PADDING, PADDING + 1);
+	cairo_clip (cr);
+
+	int bh = (height - PADDING - PADDING) * _dsp_load / 100.f;
+	cairo_rectangle (cr, PADDING, height - PADDING - bh, width - PADDING, bh);
+
+	if (_dsp_load > 90) {
+		cairo_set_source_rgba (cr, .9, 0, 0, 1.0);
+	} else if (_dsp_load > 80) {
+		cairo_set_source_rgba (cr, .7, .6, 0, 1.0);
+	} else {
+		cairo_set_source_rgba (cr, 0, .5, 0, 1.0);
+	}
+	cairo_fill (cr);
+
+	int w, h;
+	_layout->get_pixel_size (w, h);
+
+	cairo_save (cr);
+	cairo_new_path (cr);
+	cairo_translate (cr, width * .5, height * .5);
+	cairo_rotate (cr, M_PI * -.5);
+
+	cairo_move_to (cr, w * -.5, h * -.5);
+	pango_cairo_update_layout (cr, _layout->gobj());
+	Gtkmm2ext::set_source_rgb_a (cr, base, 0.5);
+	pango_cairo_layout_path (cr, _layout->gobj());
+	cairo_set_line_width (cr, 1.5);
+	cairo_stroke (cr);
+
+	cairo_move_to (cr, w * -.5, h * -.5);
+	pango_cairo_update_layout (cr, _layout->gobj());
+	Gtkmm2ext::set_source_rgba (cr, text);
+	pango_cairo_show_layout (cr, _layout->gobj());
+
+	cairo_restore (cr);
+}
+
+bool
+DspLoadIndicator::on_button_release_event (GdkEventButton *ev)
+{
+	ARDOUR::Session* s = ARDOUR_UI::instance ()->the_session ();
+	if (s) {
+		s->reset_xrun_count ();
+	}
+	return true;
+}