Move more Gtkmm2ext widgets into libwidget

1 files changed, 1121 insertions, 0 deletions

diff --git a/libs/widgets/ardour_icon.cc b/libs/widgets/ardour_icon.cc
new file mode 100644
index 0000000000..f111e8919c
--- /dev/null
+++ b/libs/widgets/ardour_icon.cc
@@ -0,0 +1,1121 @@
+/*
+    Copyright (C) 2009 Paul Davis
+    Copyright (C) 2015 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 <math.h> // M_PI
+#include <assert.h>
+#include <algorithm> // std:min
+
+#include "widgets/ardour_icon.h"
+
+using namespace ArdourWidgets::ArdourIcon;
+
+/* general style info:
+ *
+ * - geometry: icons should be centered, spanning
+ *   wh = std::min (width * .5, height *.5) * .55;
+ *
+ * - all shapes should have a contrasting outline
+ *   (usually white foreground, black outline)
+ */
+
+#define OUTLINEWIDTH 1.5 // px
+
+#define VECTORICONSTROKEFILL(fillalpha)                    \
+	cairo_set_line_width (cr, OUTLINEWIDTH);           \
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);          \
+	cairo_stroke_preserve (cr);                        \
+	cairo_set_source_rgba (cr, 1, 1, 1, (fillalpha));  \
+	cairo_fill (cr);
+
+#define VECTORICONSTROKEOUTLINE(LW, color)                 \
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);     \
+	cairo_set_line_width (cr, (LW) + OUTLINEWIDTH);    \
+	ardour_icon_set_source_inv_rgba (cr, color);       \
+	cairo_stroke_preserve (cr);                        \
+	ardour_icon_set_source_rgba (cr, color);           \
+	cairo_set_line_width (cr, (LW));                   \
+	cairo_stroke (cr);
+
+
+/** convert 32bit 'RRGGBBAA' to cairo doubles
+ * from libs/canvas/utils.cc and  canvas/types.h: typedef uint32_t Color;
+ */
+static void ardour_icon_set_source_rgba (cairo_t *cr, uint32_t color)
+{
+	cairo_set_source_rgba (cr,
+			((color >> 24) & 0xff) / 255.0,
+			((color >> 16) & 0xff) / 255.0,
+			((color >>  8) & 0xff) / 255.0,
+			((color >>  0) & 0xff) / 255.0
+			);
+}
+
+/** inverse color */
+static void ardour_icon_set_source_inv_rgba (cairo_t *cr, uint32_t color)
+{
+	cairo_set_source_rgba (cr,
+			1.0 - ((color >> 24) & 0xff) / 255.0,
+			1.0 - ((color >> 16) & 0xff) / 255.0,
+			1.0 - ((color >>  8) & 0xff) / 255.0,
+			((color >>  0) & 0xff) / 255.0
+			);
+}
+
+/*****************************************************************************
+ * Tool Icons.
+ * Foreground is always white, compatible with small un-blurred rendering.
+ */
+
+/** internal edit icon */
+static void icon_tool_content (cairo_t *cr, const int width, const int height) {
+#define EM_POINT(X,Y) round (x + (X) * em) + .5, round (y + (Y) * em) + .5
+
+		const double x  = width * .5;
+		const double y  = height * .5;
+		const double em = std::min (x, y) * .1; // 1px at 20x20
+
+		// draw dot outlines (control-points)
+		cairo_move_to (cr, EM_POINT(-6.0,  0.0));
+		cairo_close_path (cr);
+		cairo_move_to (cr, EM_POINT(-2.5,  4.0));
+		cairo_close_path (cr);
+		cairo_move_to (cr, EM_POINT( 5.0, -5.0));
+		cairo_close_path (cr);
+
+		cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+		ardour_icon_set_source_inv_rgba (cr, 0xffffffff);
+		cairo_set_line_width (cr, 3 * em + OUTLINEWIDTH);
+		cairo_stroke (cr);
+
+		// "midi note" lines
+		cairo_move_to (cr, EM_POINT(-7.0, -5.0));
+		cairo_line_to (cr, EM_POINT( 0.0, -5.0));
+
+		cairo_move_to (cr, EM_POINT( 2.0,  4.0));
+		cairo_line_to (cr, EM_POINT( 6.0,  4.0));
+
+		// automation line (connect control-points)
+		cairo_move_to (cr, EM_POINT(-6.0,  0.0));
+		cairo_line_to (cr, EM_POINT(-2.5,  4.0));
+		cairo_line_to (cr, EM_POINT( 5.0, -5.0));
+
+		cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+		VECTORICONSTROKEOUTLINE(1 * em, 0xffffffff);
+
+		// remove automation line outline at control-points
+		cairo_move_to (cr, EM_POINT(-6.0,  0.0));
+		cairo_close_path (cr);
+		cairo_move_to (cr, EM_POINT(-2.5,  4.0));
+		cairo_close_path (cr);
+		cairo_move_to (cr, EM_POINT( 5.0, -5.0));
+		cairo_close_path (cr);
+
+		ardour_icon_set_source_rgba (cr, 0xffffffff);
+		cairo_set_line_width (cr, 3 * em);
+		cairo_stroke (cr);
+#undef EM_POINT
+}
+
+/** range tool |<->| */
+static void icon_tool_range (cairo_t *cr, const int width, const int height)
+{
+	const double x  = width * .5;
+	const double y  = height * .5;
+	const double wh = std::min (x, y) * .55;
+	const double lw = rint (wh / 6.0); // line width
+	const double ar = wh * .6; // arrow
+
+	const double bw = ceil (wh) - .5;
+	const double y0 = ceil (y);
+	const double ym = rint (y0 - wh * .1) + .5; // arrow-horizontal; slightly to the top, on a px
+	const double x0 = rint (x) - bw; // left arrow tip
+	const double x1 = rint (x) + bw; // right arrow tip
+
+	// left and right box
+	cairo_move_to (cr, x0, y0 - bw);
+	cairo_line_to (cr, x0, y0 + bw);
+	VECTORICONSTROKEOUTLINE(lw, 0xffffffff);
+	cairo_move_to (cr, x1, y0 - bw);
+	cairo_line_to (cr, x1, y0 + bw);
+	VECTORICONSTROKEOUTLINE(lw, 0xffffffff);
+
+	// arrows
+	cairo_move_to (cr, x0 + ar, ym - ar);
+	cairo_line_to (cr, x0 + .5, ym);
+	cairo_line_to (cr, x0 + ar, ym + ar);
+
+	cairo_move_to (cr, x1 - ar, ym - ar);
+	cairo_line_to (cr, x1 - .5, ym);
+	cairo_line_to (cr, x1 - ar, ym + ar);
+
+	// line connecting the arrows
+	cairo_move_to (cr, x0, ym);
+	cairo_line_to (cr, x1, ym);
+	VECTORICONSTROKEOUTLINE(lw, 0xffffffff);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, 1.0);
+	cairo_set_line_width (cr, lw);
+
+	cairo_move_to (cr, x0, y0 - bw);
+	cairo_line_to (cr, x0, y0 + bw);
+	cairo_stroke (cr);
+
+	cairo_move_to (cr, x1, y0 - bw);
+	cairo_line_to (cr, x1, y0 + bw);
+	cairo_stroke (cr);
+
+
+}
+
+/** Grab/Object tool - 6x8em "hand", with 'em' wide index finger. */
+static void icon_tool_grab (cairo_t *cr, const int width, const int height)
+{
+	const double x  = width * .5;
+	const double y  = height * .5;
+	const double em = std::min (x, y) * .15; // 1.5px at 20x20
+
+#define EM_POINT(X,Y) x + (X) * em, y + (Y) * em
+
+	// wrist
+	cairo_move_to (cr, EM_POINT( 2.0,  4.0));
+	cairo_line_to (cr, EM_POINT(-1.5,  4.0));
+	cairo_line_to (cr, EM_POINT(-2.5,  2.0));
+	// thumb
+	cairo_line_to (cr, EM_POINT(-3.0,  1.0));
+
+	// index finger
+	cairo_line_to (cr, EM_POINT(-2.0,  0.0));
+	cairo_line_to (cr, EM_POINT(-2.1, -4.0));
+	cairo_line_to (cr, EM_POINT(-1.5, -4.5));
+	cairo_line_to (cr, EM_POINT(-1.1, -4.0));
+	cairo_line_to (cr, EM_POINT(-1.0,  0.1));
+
+	// middle finger knuckle
+	cairo_line_to (cr, EM_POINT(-0.6,  0.3));
+	cairo_line_to (cr, EM_POINT(-0.3,  0.0));
+	cairo_line_to (cr, EM_POINT(-0.2, -0.2));
+	cairo_line_to (cr, EM_POINT( 0.1, -0.3));
+	cairo_line_to (cr, EM_POINT( 0.4, -0.2));
+	cairo_line_to (cr, EM_POINT( 0.5,  0.1));
+
+	// ring finger knuckle
+	cairo_line_to (cr, EM_POINT( 0.8,  0.4));
+	cairo_line_to (cr, EM_POINT( 1.1,  0.2));
+	cairo_line_to (cr, EM_POINT( 1.2,  0.0));
+	cairo_line_to (cr, EM_POINT( 1.5, -0.1));
+	cairo_line_to (cr, EM_POINT( 1.8,  0.0));
+	cairo_line_to (cr, EM_POINT( 1.9,  0.4));
+
+	// pinky
+	cairo_line_to (cr, EM_POINT( 2.0,  0.6));
+	cairo_line_to (cr, EM_POINT( 2.4,  0.4));
+	cairo_line_to (cr, EM_POINT( 2.8,  0.5));
+	cairo_line_to (cr, EM_POINT( 3.0,  1.0));
+
+	// wrist
+	cairo_line_to (cr, EM_POINT( 3.0,  1.5));
+	cairo_line_to (cr, EM_POINT( 2.0,  4.0));
+
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+	cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+	VECTORICONSTROKEFILL(1.0);
+#undef EM_POINT
+}
+
+/** cut icon - scissors */
+static void icon_tool_cut (cairo_t *cr, const int width, const int height)
+{
+	const double x  = width * .5;
+	const double y  = height * .5;
+	const double em = std::min (x, y) * .1; // 1px at 20x20
+
+#define EM_POINT(X,Y) x + (X) * em, y + (Y) * em
+
+	cairo_save (cr);
+	cairo_translate (cr, EM_POINT(4, -3));
+	cairo_scale (cr, 1.6, 1.0); // ellipse
+	cairo_arc (cr, 0., 0., 1.5 * em, 0., 2 * M_PI);
+	cairo_restore (cr);
+
+	cairo_move_to (cr, EM_POINT(-6.0,  2.5));
+	cairo_line_to (cr, EM_POINT( 5.5, -2.0));
+
+	cairo_move_to (cr, EM_POINT(-6.0, -2.5));
+	cairo_line_to (cr, EM_POINT( 5.5,  2.0));
+
+	cairo_save (cr);
+	cairo_translate (cr, EM_POINT(4,  3));
+	cairo_scale (cr, 1.6, 1.0); // ellipse
+	cairo_arc (cr, 0., 0., 1.5 * em, 0., 2 * M_PI);
+	cairo_restore (cr);
+
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+	cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+
+	VECTORICONSTROKEOUTLINE (1.5 * em, 0xffffffff);
+#undef EM_POINT
+}
+
+/** time stretch icon */
+static void icon_tool_stretch (cairo_t *cr, const int width, const int height)
+{
+	const double x  = width * .5;
+	const double y  = height * .5;
+	const double wh = std::min (x, y) * .55;
+
+	const double y0 = ceil (y);
+	const double bw = rint (wh);
+	const double lw = rint (wh / 3.0) / 2.0;
+	const double x0 = rint (x + lw) + .5;
+
+	// box indication region
+	cairo_rectangle (cr, x0 - lw - bw - .5, y0 - bw, lw + bw, 2 * bw);
+	VECTORICONSTROKEFILL (0.75);
+
+	cairo_set_line_width (cr, 1.0);
+
+	// inside/left arrow
+	cairo_move_to (cr, x0,          y);
+	cairo_line_to (cr, x0 - lw * 2, y);
+	cairo_line_to (cr, x0 - lw * 2, y - lw * 3.5);
+	cairo_line_to (cr, x0 - lw * 6, y);
+	cairo_line_to (cr, x0 - lw * 2, y + lw * 3.5);
+	cairo_line_to (cr, x0 - lw * 2, y);
+
+	cairo_set_source_rgba (cr, 0, 0, 0, .5);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_fill (cr);
+
+	// outside/right arrow
+	cairo_move_to (cr, x0,          y);
+	cairo_line_to (cr, x0 + lw * 2, y);
+	cairo_line_to (cr, x0 + lw * 2, y - lw * 4);
+	cairo_line_to (cr, x0 + lw * 6, y);
+	cairo_line_to (cr, x0 + lw * 2, y + lw * 4);
+	cairo_line_to (cr, x0 + lw * 2, y);
+
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 1, 1, 1, 1.0);
+	cairo_fill (cr);
+}
+
+/** audition - small speaker with sound-waves*/
+static void icon_tool_audition (cairo_t *cr, const int width, const int height)
+{
+	const double x  = width * .5;
+	const double y  = height * .5;
+	const double em = std::min (x, y) * .1; // 1px at 20x20
+
+#define EM_POINT(X,Y) x + (X) * em, y + (Y) * em
+
+	cairo_move_to (cr, EM_POINT(-7.0, -2.0));
+	cairo_line_to (cr, EM_POINT(-7.0,  2.0));
+	cairo_line_to (cr, EM_POINT(-6.0,  3.0));
+	cairo_line_to (cr, EM_POINT(-3.0,  3.0));
+	cairo_line_to (cr, EM_POINT( 2.0,  6.0));
+	cairo_line_to (cr, EM_POINT( 2.0, -6.0));
+	cairo_line_to (cr, EM_POINT(-3.0, -3.0));
+	cairo_line_to (cr, EM_POINT(-6.0, -3.0));
+	cairo_close_path (cr);
+
+	cairo_pattern_t *speaker;
+	speaker = cairo_pattern_create_linear (EM_POINT(0, -3.0), EM_POINT(0, 3.0));
+	cairo_pattern_add_color_stop_rgba (speaker, 0.0,  0.8, 0.8, 0.8, 1.0);
+	cairo_pattern_add_color_stop_rgba (speaker, 0.25, 1.0, 1.0, 1.0, 1.0);
+	cairo_pattern_add_color_stop_rgba (speaker, 1.0,  0.6, 0.6, 0.6, 1.0);
+
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+	cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+	cairo_set_line_width (cr, 1.5);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_stroke_preserve (cr);
+	cairo_set_source (cr, speaker);
+	cairo_fill (cr);
+	cairo_pattern_destroy (speaker);
+
+	// TODO use a slight curve
+	cairo_move_to (cr, EM_POINT(-3.0, -3.0));
+	cairo_line_to (cr, EM_POINT(-3.5,  0.0));
+	cairo_line_to (cr, EM_POINT(-3.0,  3.0));
+	cairo_set_source_rgba (cr, 0, 0, 0, 0.7);
+	cairo_set_line_width (cr, 1.0);
+	cairo_stroke (cr);
+
+
+	cairo_save (cr);
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+	cairo_set_source_rgba (cr, 1, 1, 1, 1);
+
+	cairo_translate (cr, EM_POINT (4.0, 0));
+	cairo_scale (cr, 0.8, 1.25); // ellipse
+
+	cairo_arc (cr, 0, 0, 4 * em, -.5 * M_PI, .5 * M_PI);
+	cairo_set_line_width (cr, .8 * em);
+	cairo_stroke (cr);
+
+	cairo_arc (cr, 0, 0, 2 * em, -.5 * M_PI, .5 * M_PI);
+	cairo_set_line_width (cr, .5 * em);
+	cairo_stroke (cr);
+	cairo_restore (cr);
+#undef EM_POINT
+}
+
+/** pen top-left to bottom right */
+static void icon_tool_draw (cairo_t *cr, const int width, const int height)
+{
+	const double x  = width * .5;
+	const double y  = height * .5;
+	const double em = std::min (x, y) * .1; // 1px at 20x20
+
+#define EM_POINT(X,Y) x + (X) * em, y + (Y) * em
+
+	// pen [6,-5] to [-3, 3]
+	// y = -8 * x / 9 + 1/3
+
+	// top-right end
+	cairo_move_to (cr, EM_POINT( 5.0, -6.11));
+	cairo_line_to (cr, EM_POINT( 6.4, -5.35)); // todo round properly.
+	cairo_line_to (cr, EM_POINT( 7.0, -3.88));
+
+	// bottom-left w/tip
+	cairo_line_to (cr, EM_POINT(-2.0,  4.11));
+	cairo_line_to (cr, EM_POINT(-6.0,  5.66)); // pen tip
+	cairo_line_to (cr, EM_POINT(-4.0,  1.88));
+	cairo_close_path (cr);
+
+	cairo_pattern_t *pen;
+	pen = cairo_pattern_create_linear (EM_POINT(-3.0, -6.0), EM_POINT(6.0, 4.0));
+	cairo_pattern_add_color_stop_rgba (pen, 0.4, 0.6, 0.6, 0.6, 1.0);
+	cairo_pattern_add_color_stop_rgba (pen, 0.5, 1.0, 1.0, 1.0, 1.0);
+	cairo_pattern_add_color_stop_rgba (pen, 0.6, 0.1, 0.1, 0.1, 1.0);
+
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+	cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+	cairo_set_line_width (cr, em + .5);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_stroke_preserve (cr);
+	cairo_set_source (cr, pen);
+	cairo_fill (cr);
+
+	// separate the tip
+	cairo_move_to (cr, EM_POINT(-2.0,  4.11));
+	cairo_line_to (cr, EM_POINT(-3.0,  2.8)); // slight curve [-3,3]
+	cairo_line_to (cr, EM_POINT(-4.0,  2.0));
+	cairo_set_line_width (cr, OUTLINEWIDTH);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+	cairo_stroke (cr);
+
+	// pen tip
+	cairo_move_to (cr, EM_POINT(-5.0, 3.9));
+	cairo_line_to (cr, EM_POINT(-6.0, 5.66));
+	cairo_line_to (cr, EM_POINT(-4.1, 4.9));
+	cairo_close_path (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 0.7);
+	cairo_set_line_width (cr, em);
+	cairo_stroke_preserve (cr);
+	cairo_fill (cr);
+
+	cairo_pattern_destroy (pen);
+#undef EM_POINT
+}
+
+/** Toolbar icon - Time Axis View reduce height */
+static void icon_tav_shrink (cairo_t *cr, const int width, const int height)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double wh = std::min (x, y) * .66;
+	const double ar = std::min (x, y) * .15;
+	const double tri = .7 * (wh - ar);
+
+	cairo_rectangle (cr, x - wh, y - ar, 2 * wh, 2 * ar);
+	VECTORICONSTROKEFILL(.75);
+
+	cairo_set_line_width (cr, 1.0);
+
+	cairo_move_to (cr, x,       y - ar - 0.5);
+	cairo_line_to (cr, x - tri, y - wh + 0.5);
+	cairo_line_to (cr, x + tri, y - wh + 0.5);
+	cairo_close_path (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, .75);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_fill (cr);
+
+	cairo_move_to (cr, x,       y + ar + 0.5);
+	cairo_line_to (cr, x - tri, y + wh - 0.5);
+	cairo_line_to (cr, x + tri, y + wh - 0.5);
+	cairo_close_path (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, .75);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_fill (cr);
+}
+
+/** Toolbar icon - Time Axis View increase height */
+static void icon_tav_expand (cairo_t *cr, const int width, const int height)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double wh = std::min (x, y) * .66;
+	const double ar = std::min (x, y) * .15;
+	const double tri = .7 * (wh - ar);
+
+	cairo_rectangle (cr, x - wh, y - wh, 2 * wh, 2 * wh);
+	VECTORICONSTROKEFILL(.75);
+
+	cairo_set_line_width (cr, 1.0);
+
+	cairo_move_to (cr, x,       y - wh + 0.5);
+	cairo_line_to (cr, x - tri, y - ar - 0.5);
+	cairo_line_to (cr, x + tri, y - ar - 0.5);
+	cairo_close_path (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, .5);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_fill (cr);
+
+	cairo_move_to (cr, x      , y + wh - 0.5);
+	cairo_line_to (cr, x - tri, y + ar + 0.5);
+	cairo_line_to (cr, x + tri, y + ar + 0.5);
+	cairo_close_path (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, .5);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_fill (cr);
+}
+
+
+/*****************************************************************************
+ * Record enable (transport & track header).
+ *
+ * hardcoded "red" #f46f6f
+ */
+
+/** standard rec-enable circle */
+static void icon_rec_enable (cairo_t *cr, const int width, const int height, const Gtkmm2ext::ActiveState state)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double r = std::min (x, y) * .55;
+	cairo_arc (cr, x, y, r, 0, 2 * M_PI);
+	if (state == Gtkmm2ext::ExplicitActive) {
+		cairo_set_source_rgba (cr, 1.0, .1, .1, 1.0);
+	}
+	else if (state == Gtkmm2ext::ImplicitActive) {
+		cairo_set_source_rgba (cr, .9, .3, .3, 1.0);
+	}
+	else {
+		cairo_set_source_rgba (cr, .4, .3, .3, 1.0);
+	}
+	cairo_fill_preserve (cr);
+	cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8); // outline
+	cairo_set_line_width (cr, 1);
+	cairo_stroke (cr);
+}
+
+/** tape-mode, "reel" */
+static void icon_rec_tape (cairo_t *cr, const int width, const int height, const Gtkmm2ext::ActiveState state)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double r = std::min (x, y) * .6;
+	const double slit = .11 * M_PI;
+	cairo_translate (cr, x, y);
+
+	cairo_arc (cr, 0, 0, r, 0, 2 * M_PI);
+	if (state == Gtkmm2ext::ExplicitActive) {
+		cairo_set_source_rgba (cr, 1.0, .1, .1, 1.0);
+	}
+	else if (state == Gtkmm2ext::ImplicitActive) {
+		cairo_set_source_rgba (cr, .9, .3, .3, 1.0);
+	}
+	else {
+		cairo_set_source_rgba (cr, .4, .3, .3, 1.0);
+	}
+	cairo_fill_preserve (cr);
+	cairo_set_source_rgba (cr, .0, .0, .0, .5);
+	cairo_set_line_width (cr, 1);
+	cairo_stroke (cr);
+
+	cairo_save (cr);
+	cairo_set_source_rgba (cr, .15, .07, .07, 1.0);
+
+	cairo_rotate (cr, -.5 * M_PI);
+	cairo_move_to (cr, 0, 0);
+	cairo_arc (cr, 0, 0, r *.85, -slit, slit);
+	cairo_line_to (cr, 0, 0);
+	cairo_close_path (cr);
+
+	cairo_fill (cr);
+	cairo_rotate (cr, 2. * M_PI / 3.);
+
+	cairo_move_to (cr, 0, 0);
+	cairo_arc (cr, 0, 0, r *.85, -slit, slit);
+	cairo_line_to (cr, 0, 0);
+	cairo_close_path (cr);
+	cairo_fill (cr);
+
+	cairo_rotate (cr, 2. * M_PI / 3.);
+	cairo_move_to (cr, 0, 0);
+	cairo_arc (cr, 0, 0, r *.85, -slit, slit);
+	cairo_line_to (cr, 0, 0);
+	cairo_close_path (cr);
+	cairo_fill (cr);
+
+	cairo_restore (cr);
+
+	cairo_arc (cr, 0, 0, r * .3, 0, 2 * M_PI);
+	if (state == Gtkmm2ext::ExplicitActive) {
+		cairo_set_source_rgba (cr, 1.0, .1, .1, 1.0);
+	}
+	else if (state == Gtkmm2ext::ImplicitActive) {
+		cairo_set_source_rgba (cr, .9, .3, .3, 1.0);
+	}
+	else {
+		cairo_set_source_rgba (cr, .4, .3, .3, 1.0);
+	}
+	cairo_fill (cr);
+	cairo_set_source_rgba (cr, .0, .0, .0, 1.0);
+	cairo_arc (cr, 0, 0, r *.15, 0, 2 * M_PI); // hole in the middle
+	cairo_fill (cr);
+}
+
+
+/*****************************************************************************
+ * Transport buttons, foreground is always white
+ */
+
+/** stop square box */
+static void icon_transport_stop (cairo_t *cr, const int width, const int height)
+{
+	const int wh = std::min (width, height);
+	cairo_rectangle (cr,
+			(width - wh) * .5 + wh * .25,
+			(height - wh) * .5 + wh * .25,
+			wh * .5, wh * .5);
+	VECTORICONSTROKEFILL(0.9); // small 'shine'
+}
+
+/** play triangle */
+static void icon_transport_play (cairo_t *cr, const int width, const int height)
+{
+	const int wh = std::min (width, height) * .5;
+	const double y = height * .5;
+	const double x = width - wh;
+
+	const double tri = ceil (.577 * wh); // 1/sqrt(3)
+
+	cairo_move_to (cr,  x + wh * .5, y);
+	cairo_line_to (cr,  x - wh * .5, y - tri);
+	cairo_line_to (cr,  x - wh * .5, y + tri);
+	cairo_close_path (cr);
+
+	VECTORICONSTROKEFILL(0.9);
+}
+
+/** Midi Panic "!" */
+static void icon_transport_panic (cairo_t *cr, const int width, const int height)
+{
+	const int wh = ceil (std::min (width, height) * .1) - .5;
+	const double xc = rint (width * .5);
+	const double yh = height;
+	cairo_rectangle (cr,
+	                 xc - wh, yh *.19,
+	                 wh * 2,  yh *.41);
+	VECTORICONSTROKEFILL(0.9);
+
+	cairo_arc (cr, xc, yh *.75, wh, 0, 2 * M_PI);
+	VECTORICONSTROKEFILL(0.9);
+}
+
+/** various combinations of lines and triangles "|>|", ">|" "|>" */
+static void icon_transport_ck (cairo_t *cr,
+		const enum ArdourWidgets::ArdourIcon::Icon icon,
+		const int width, const int height)
+{
+	// small play triangle
+	int wh = std::min (width, height);
+	const double y = height * .5;
+	const double x = width - wh * .5;
+	wh *= .18;
+	const double tri = ceil (.577 * wh * 2); // 1/sqrt(3)
+
+	const float ln = std::min (width, height) * .07;
+
+	if (icon == TransportStart || icon == TransportRange) {
+		cairo_rectangle (cr,
+				x - wh - ln, y  - tri * 1.7,
+				ln * 2,  tri * 3.4);
+
+		VECTORICONSTROKEFILL(1.0);
+	}
+
+	if (icon == TransportEnd || icon == TransportRange) {
+		cairo_rectangle (cr,
+				x + wh - ln, y  - tri * 1.7,
+				ln * 2,  tri * 3.4);
+
+		VECTORICONSTROKEFILL(1.0);
+	}
+
+	if (icon == TransportStart) {
+		cairo_move_to (cr,  x - wh, y);
+		cairo_line_to (cr,  x + wh, y - tri);
+		cairo_line_to (cr,  x + wh, y + tri);
+	} else {
+		cairo_move_to (cr,  x + wh, y);
+		cairo_line_to (cr,  x - wh, y - tri);
+		cairo_line_to (cr,  x - wh, y + tri);
+	}
+
+	cairo_close_path (cr);
+	VECTORICONSTROKEFILL(1.0);
+}
+
+/** loop spiral */
+static void icon_transport_loop (cairo_t *cr, const int width, const int height)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double r = std::min (x, y);
+
+	cairo_arc          (cr, x, y, r * .62, 0, 2 * M_PI);
+	cairo_arc_negative (cr, x, y, r * .35, 2 * M_PI, 0);
+
+	VECTORICONSTROKEFILL(1.0);
+
+#define ARCARROW(rad, ang) \
+	x + (rad) * sin ((ang) * 2.0 * M_PI), y + (rad) * cos ((ang) * 2.0 * M_PI)
+
+	cairo_move_to (cr, ARCARROW(r * .35, .72));
+	cairo_line_to (cr, ARCARROW(r * .15, .72));
+	cairo_line_to (cr, ARCARROW(r * .56, .60));
+	cairo_line_to (cr, ARCARROW(r * .75, .72));
+	cairo_line_to (cr, ARCARROW(r * .62, .72));
+
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_stroke_preserve (cr);
+	cairo_close_path (cr);
+	cairo_set_source_rgba (cr, 1, 1, 1, 1.0);
+	cairo_fill (cr);
+#undef ARCARROW
+}
+
+/** de-construct thorwil's metronom */
+static void icon_transport_metronom (cairo_t *cr, const int width, const int height)
+{
+	const double x  = width * .5;
+	const double y  = height * .5;
+	const double wh = .95 * std::min (x, y);
+	const double h  = wh * .80;
+	const double w  = wh * .55;
+	const double lw = w  * .34;
+
+	cairo_rectangle (cr,
+			x - w * .7, y + h * .25,
+			w * 1.4, lw);
+
+	VECTORICONSTROKEFILL(1.0);
+
+	cairo_move_to (cr,  x - w,       y + h);
+	cairo_line_to (cr,  x + w,       y + h);
+	cairo_line_to (cr,  x + w * .35, y - h);
+	cairo_line_to (cr,  x - w * .35, y - h);
+	cairo_line_to (cr,  x - w,       y + h);
+
+	cairo_move_to (cr,  x - w + lw,       y + h -lw);
+	cairo_line_to (cr,  x - w * .35 + lw, y - h + lw);
+	cairo_line_to (cr,  x + w * .35 - lw, y - h + lw);
+	cairo_line_to (cr,  x + w - lw,       y + h -lw);
+	cairo_line_to (cr,  x - w + lw,       y + h -lw);
+
+	VECTORICONSTROKEFILL(1.0);
+
+	// Pendulum
+	// ddx = .70 w      = .75 * .5 wh              = .375 wh
+	// ddy = .75 h - lw = .75 * .8 wh - wh .5 * .2 = .5 wh
+	// ang = (ddx/ddy):
+	// -> angle = atan (ang) = atan (375 / .5) ~= 36deg
+	const double dx = lw * .2;  // 1 - cos(tan^-1(ang))
+	const double dy = lw * .4;  // 1 - sin(tan^-1(ang))
+	cairo_move_to (cr,  x - w * .3     , y + h * .25 + lw * .5);
+	cairo_line_to (cr,  x - w + dx     , y - h + lw + dy);
+	cairo_line_to (cr,  x - w + lw     , y - h + lw);
+	cairo_line_to (cr,  x - w * .3 + lw, y + h * .25 + lw * .5);
+	cairo_close_path (cr);
+
+	VECTORICONSTROKEFILL(1.0);
+
+	cairo_rectangle (cr,
+			x - w * .7, y + h * .25,
+			w * 1.4, lw);
+	cairo_fill (cr);
+}
+
+
+/*****************************************************************************
+ * Zoom: In "+", Out "-" and Full "[]"
+ */
+static void icon_zoom (cairo_t *cr, const enum ArdourWidgets::ArdourIcon::Icon icon, const int width, const int height, const uint32_t fg_color)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double r = std::min (x, y) * .7;
+	const double wh = std::min (x, y) * .45;
+
+	// draw handle first
+#define LINE45DEG(rad) \
+	x + r * (rad) * .707, y + r * (rad) * .707 // sin(45deg) = cos(45deg) = .707
+	cairo_move_to (cr, LINE45DEG(.9));
+	cairo_line_to (cr, LINE45DEG(1.3));
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+	cairo_set_line_width (cr, 3.0);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_stroke (cr);
+#undef LINE45DEG
+
+	// lens
+	ardour_icon_set_source_rgba (cr, fg_color);
+	cairo_arc (cr, x, y, r, 0, 2 * M_PI);
+	cairo_fill_preserve (cr);
+
+	// add a lens gradient
+	cairo_pattern_t *lens;
+	lens = cairo_pattern_create_radial (x - r, y - r, r * .5, x - r, y - r, r * 2);
+	cairo_pattern_add_color_stop_rgba (lens, 0, 1, 1, 1, .4);
+	cairo_pattern_add_color_stop_rgba (lens, 1, 0, 0, 0, .4);
+	cairo_set_source (cr, lens);
+	cairo_fill_preserve (cr);
+	cairo_pattern_destroy (lens);
+
+	// outline
+	cairo_set_line_width (cr, 1.5);
+	//ardour_icon_set_source_inv_rgba (cr, fg_color); // alpha
+	cairo_set_source_rgba (cr, .0, .0, .0, .8);
+	cairo_stroke (cr);
+
+	// add "+", "-" or "[]"
+	cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+	cairo_set_line_width (cr, 1.5);
+	ardour_icon_set_source_inv_rgba (cr, fg_color);
+
+	if (icon == ZoomIn || icon == ZoomOut) {
+		cairo_move_to (cr, x - wh, y);
+		cairo_line_to (cr, x + wh, y);
+		cairo_stroke (cr);
+	}
+	if (icon == ZoomIn) {
+		cairo_move_to (cr, x, y - wh);
+		cairo_line_to (cr, x, y + wh);
+		cairo_stroke (cr);
+	}
+	if (icon == ZoomFull) {
+		const double br0 = std::min (x, y) * .1;
+		const double br1 = std::min (x, y) * .3;
+		const double bry = std::min (x, y) * .3;
+		cairo_move_to (cr, x - br0, y - bry);
+		cairo_line_to (cr, x - br1, y - bry);
+		cairo_line_to (cr, x - br1, y + bry);
+		cairo_line_to (cr, x - br0, y + bry);
+		cairo_stroke (cr);
+
+		cairo_move_to (cr, x + br0, y - bry);
+		cairo_line_to (cr, x + br1, y - bry);
+		cairo_line_to (cr, x + br1, y + bry);
+		cairo_line_to (cr, x + br0, y + bry);
+		cairo_stroke (cr);
+	}
+}
+
+/** Toolbar icon - Mixbus Zoom Expand, rotated TimeAxisExpand */
+static void icon_zoom_expand (cairo_t *cr, const int width, const int height)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double wh = std::min (x, y) * .66;
+	const double ar = std::min (x, y) * .15;
+	const double tri = .7 * (wh - ar);
+
+	cairo_rectangle (cr, x - wh, y - wh, 2 * wh, 2 * wh);
+	VECTORICONSTROKEFILL(.75);
+
+	cairo_set_line_width (cr, 1.0);
+
+	cairo_move_to (cr, x - wh + 0.5, y);
+	cairo_line_to (cr, x - ar - 0.5, y - tri);
+	cairo_line_to (cr, x - ar - 0.5, y + tri);
+	cairo_close_path (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, .5);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_fill (cr);
+
+	cairo_move_to (cr, x + wh - 0.5, y);
+	cairo_line_to (cr, x + ar + 0.5, y - tri);
+	cairo_line_to (cr, x + ar + 0.5, y + tri);
+	cairo_close_path (cr);
+
+	cairo_set_source_rgba (cr, 1, 1, 1, .5);
+	cairo_stroke_preserve (cr);
+	cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
+	cairo_fill (cr);
+}
+
+
+
+/*****************************************************************************
+ * Misc buttons
+ */
+
+/** "close" - "X" , no outline */
+static void icon_close_cross (cairo_t *cr, const int width, const int height, const uint32_t fg_color)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double o = .5 + std::min (x, y) * .4;
+	ardour_icon_set_source_rgba (cr, fg_color);
+	cairo_set_line_width (cr, 1.0);
+	cairo_move_to (cr, x-o, y-o);
+	cairo_line_to (cr, x+o, y+o);
+	cairo_move_to (cr, x+o, y-o);
+	cairo_line_to (cr, x-o, y+o);
+	cairo_stroke (cr);
+}
+
+/** "<" */
+static void icon_nudge_left (cairo_t *cr, const int width, const int height, const uint32_t fg_color)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double wh = std::min (x, y);
+
+	const double tri_x = .3 * wh;
+	const double tri_y = .6 * wh;
+
+	cairo_move_to (cr, x + tri_x, y - tri_y);
+	cairo_line_to (cr, x - tri_x, y);
+	cairo_line_to (cr, x + tri_x, y + tri_y);
+	VECTORICONSTROKEOUTLINE(1.5, fg_color);
+}
+
+/** ">" */
+static void icon_nudge_right (cairo_t *cr, const int width, const int height, const uint32_t fg_color)
+{
+
+	const double x = width * .5;
+	const double y = height * .5;
+	const double wh = std::min (x, y);
+
+	const double tri_x = .3 * wh;
+	const double tri_y = .6 * wh;
+
+	cairo_move_to (cr, x - tri_x, y - tri_y);
+	cairo_line_to (cr, x + tri_x, y);
+	cairo_line_to (cr, x - tri_x, y + tri_y);
+	VECTORICONSTROKEOUTLINE(1.5, fg_color);
+
+}
+
+/** mixer strip narrow/wide */
+static void icon_strip_width (cairo_t *cr, const int width, const int height, const uint32_t fg_color)
+{
+	const double x0 = width   * .2;
+	const double x1 = width   * .8;
+
+	const double y0 = height  * .25;
+	const double y1 = height  * .75;
+
+	const double ym = height  * .5;
+
+	// arrow
+	const double xa0= width  * .39;
+	const double xa1= width  * .61;
+	const double ya0= height * .35;
+	const double ya1= height * .65;
+
+	ardour_icon_set_source_rgba (cr, fg_color);
+	cairo_set_line_width (cr, 1);
+
+	// left + right
+	cairo_move_to (cr, x0, y0);
+	cairo_line_to (cr, x0, y1);
+	cairo_move_to (cr, x1, y0);
+	cairo_line_to (cr, x1, y1);
+
+	// horiz center line
+	cairo_move_to (cr, x0, ym);
+	cairo_line_to (cr, x1, ym);
+
+	// arrow left
+	cairo_move_to (cr,  x0, ym);
+	cairo_line_to (cr, xa0, ya0);
+	cairo_move_to (cr,  x0, ym);
+	cairo_line_to (cr, xa0, ya1);
+
+	// arrow right
+	cairo_move_to (cr,  x1,  ym);
+	cairo_line_to (cr, xa1, ya0);
+	cairo_move_to (cr,  x1,  ym);
+	cairo_line_to (cr, xa1, ya1);
+	cairo_stroke (cr);
+}
+
+/** 5-pin DIN MIDI socket */
+static void icon_din_midi (cairo_t *cr, const int width, const int height, const uint32_t fg_color)
+{
+	const double x = width * .5;
+	const double y = height * .5;
+	const double r = std::min (x, y) * .75;
+	ardour_icon_set_source_rgba (cr, fg_color);
+	cairo_set_line_width (cr, 1);
+	cairo_arc (cr, x, y, r, .57 * M_PI, 2.43 * M_PI);
+	cairo_stroke (cr);
+
+	// pins equally spaced 45deg
+	cairo_arc (cr, x, y * 0.5, r * .15, 0, 2 * M_PI);
+	cairo_fill (cr);
+	cairo_arc (cr, x * 0.5, y, r * .15, 0, 2 * M_PI);
+	cairo_fill (cr);
+	cairo_arc (cr, x * 1.5, y, r * .15, 0, 2 * M_PI);
+	cairo_fill (cr);
+	//  .5 + .5 * .5 * sin(45deg),  1.5 - .5 * .5 * cos(45deg)
+	cairo_arc (cr, x * 0.677, y * .677, r * .15, 0, 2 * M_PI);
+	cairo_fill (cr);
+	cairo_arc (cr, x * 1.323, y * .677, r * .15, 0, 2 * M_PI);
+	cairo_fill (cr);
+
+	// bottom notch
+	cairo_arc (cr, x, y+r, r * .26, 1.05 * M_PI, 1.95 * M_PI);
+	cairo_stroke (cr);
+}
+
+
+/*****************************************************************************/
+
+bool
+ArdourWidgets::ArdourIcon::render (cairo_t *cr,
+                                   const enum ArdourWidgets::ArdourIcon::Icon icon,
+                                   const int width, const int height,
+                                   const Gtkmm2ext::ActiveState state,
+                                   const uint32_t fg_color)
+{
+	bool rv = true;
+	cairo_save (cr);
+
+	if (width < 6 || height < 6) {
+		return false;
+	}
+
+	switch (icon) {
+		case TransportStop:
+			icon_transport_stop (cr, width, height);
+			break;
+		case TransportPlay:
+			icon_transport_play (cr, width, height);
+			break;
+		case TransportLoop:
+			icon_transport_loop (cr, width, height);
+			break;
+		case TransportMetronom:
+			icon_transport_metronom (cr, width, height);
+			break;
+		case TransportPanic:
+			icon_transport_panic (cr, width, height);
+			break;
+		case TransportStart: // no break
+		case TransportEnd:   // no break
+		case TransportRange:
+			icon_transport_ck (cr, icon, width, height);
+			break;
+		case RecTapeMode:
+			icon_rec_tape (cr, width, height, state);
+			break;
+		case RecButton:
+			icon_rec_enable (cr, width, height, state);
+			break;
+		case CloseCross:
+			icon_close_cross (cr, width, height, fg_color);
+			break;
+		case StripWidth:
+			icon_strip_width (cr, width, height, fg_color);
+			break;
+		case DinMidi:
+			icon_din_midi (cr, width, height, fg_color);
+			break;
+		case NudgeLeft:
+			icon_nudge_left (cr, width, height, fg_color);
+			break;
+		case NudgeRight:
+			icon_nudge_right (cr, width, height, fg_color);
+			break;
+		case ZoomIn:  // no break
+		case ZoomOut: // no break
+		case ZoomFull:
+			icon_zoom (cr, icon, width, height, fg_color);
+			break;
+		case ZoomExpand:
+			icon_zoom_expand (cr, width, height);
+			break;
+		case TimeAxisShrink:
+			icon_tav_shrink (cr, width, height);
+			break;
+		case TimeAxisExpand:
+			icon_tav_expand (cr, width, height);
+			break;
+		case ToolRange:
+			icon_tool_range (cr, width, height);
+			break;
+		case ToolGrab:
+			icon_tool_grab (cr, width, height);
+			break;
+		case ToolCut:
+			icon_tool_cut (cr, width, height);
+			break;
+		case ToolStretch:
+			icon_tool_stretch (cr, width, height);
+			break;
+		case ToolAudition:
+			icon_tool_audition (cr, width, height);
+			break;
+		case ToolDraw:
+			icon_tool_draw (cr, width, height);
+			break;
+		case ToolContent:
+			icon_tool_content (cr, width, height);
+			break;
+		default:
+			rv = false;
+			break;
+	}
+	cairo_restore (cr);
+	return rv;
+}
+
+#undef VECTORICONSTROKEFILL
+#undef VECTORICONSTROKEOUTLINE