1 files changed, 151 insertions, 0 deletions
diff --git a/libs/surfaces/maschine2/canvas.cc b/libs/surfaces/maschine2/canvas.cc
new file mode 100644
index 0000000000..bde0d6777c
--- /dev/null
+++ b/libs/surfaces/maschine2/canvas.cc
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2016 Paul Davis
+ * Copyright (C) 2016 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, 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 <vector>
+
+#include <cairomm/region.h>
+#include <cairomm/surface.h>
+#include <cairomm/context.h>
+
+#include "pbd/compose.h"
+#include "pbd/error.h"
+#include "pbd/i18n.h"
+
+#include "canvas.h"
+#include "layout.h"
+
+#include "maschine2.h"
+#include "m2device.h"
+
+#ifdef __APPLE__
+#define Rect ArdourCanvas::Rect
+#endif
+
+using namespace ArdourCanvas;
+using namespace ArdourSurface;
+using namespace PBD;
+
+Maschine2Canvas::Maschine2Canvas (Maschine2&m, M2Device* hw)
+	: m2 (m)
+{
+	context = Cairo::Context::create (hw->surface ());
+	expose_region = Cairo::Region::create ();
+	_width = hw->surface ()->get_width ();
+	_height = hw->surface ()->get_height ();
+
+	hw->vblank.connect_same_thread (vblank_connections, boost::bind (&Maschine2Canvas::expose, this));
+}
+
+Maschine2Canvas::~Maschine2Canvas ()
+{
+}
+
+void
+Maschine2Canvas::request_redraw ()
+{
+	request_redraw (Rect (0, 0, _width, _height));
+}
+
+void
+Maschine2Canvas::request_redraw (Rect const & r)
+{
+	Cairo::RectangleInt cr;
+
+	cr.x = r.x0;
+	cr.y = r.y0;
+	cr.width = r.width();
+	cr.height = r.height();
+
+	expose_region->do_union (cr);
+
+	/* next vblank will redraw */
+}
+
+bool
+Maschine2Canvas::expose ()
+{
+	if (expose_region->empty()) {
+		return false; /* nothing drawn */
+	}
+
+	/* set up clipping */
+
+	const int nrects = expose_region->get_num_rectangles ();
+
+	for (int n = 0; n < nrects; ++n) {
+		Cairo::RectangleInt r = expose_region->get_rectangle (n);
+		context->rectangle (r.x, r.y, r.width, r.height);
+	}
+
+	context->clip ();
+
+	Maschine2Layout* layout = m2.current_layout();
+
+	if (layout) {
+		/* all layouts cover (at least) the full size of the video
+		   display, so we do not need to check if the layout intersects
+		   the bounding box of the full expose region.
+		*/
+		Cairo::RectangleInt r = expose_region->get_extents();
+		Rect rr (r.x, r.y, r.x + r.width, r.y + r.height);
+		layout->render (Rect (r.x, r.y, r.x + r.width, r.y + r.height), context);
+	}
+
+	context->reset_clip ();
+
+	/* why is there no "reset()" method for Cairo::Region? */
+	expose_region = Cairo::Region::create ();
+	return true;
+}
+
+void
+Maschine2Canvas::request_size (Duple)
+{
+	/* fixed size canvas */
+}
+
+Rect
+Maschine2Canvas::visible_area () const
+{
+	/* may need to get more sophisticated once we do scrolling */
+	return Rect (0, 0, _width, _height);
+}
+
+Glib::RefPtr<Pango::Context>
+Maschine2Canvas::get_pango_context ()
+{
+	if (!pango_context) {
+		PangoFontMap* map = pango_cairo_font_map_get_default ();
+		if (!map) {
+			error << _("Default Cairo font map is null!") << endmsg;
+			return Glib::RefPtr<Pango::Context> ();
+		}
+
+		PangoContext* context = pango_font_map_create_context (map);
+
+		if (!context) {
+			error << _("cannot create new PangoContext from cairo font map") << endmsg;
+			return Glib::RefPtr<Pango::Context> ();
+		}
+
+		pango_context = Glib::wrap (context);
+	}
+
+	return pango_context;
+}