[sysprof] libsysprof-ui: tweak marks drawing

[Christian Hergert <chergert src gnome org>]

commit 24e339f36f8a7b3a0e2f205aca7c0fbc88e5b16e
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 16 16:26:36 2019 -0700

    libsysprof-ui: tweak marks drawing

 src/libsysprof-ui/sysprof-cairo.c                  | 71 ++++++++++++++++++++++
 src/libsysprof-ui/sysprof-cell-renderer-duration.c | 28 +++++++--
 2 files changed, 95 insertions(+), 4 deletions(-)
---
diff --git a/src/libsysprof-ui/sysprof-cairo.c b/src/libsysprof-ui/sysprof-cairo.c
new file mode 100644
index 0000000..3d8f82a
--- /dev/null
+++ b/src/libsysprof-ui/sysprof-cairo.c
@@ -0,0 +1,71 @@
+/* sysprof-cairo.c
+ *
+ * Copyright 2019 Christian Hergert <chergert redhat com>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include "sysprof-ui-private.h"
+
+void
+_sysprof_rounded_rectangle (cairo_t            *cr,
+                            const GdkRectangle *rect,
+                            gint                x_radius,
+                            gint                y_radius)
+{
+  gint x;
+  gint y;
+  gint width;
+  gint height;
+  gint x1, x2;
+  gint y1, y2;
+  gint xr1, xr2;
+  gint yr1, yr2;
+
+  g_return_if_fail (cr);
+  g_return_if_fail (rect);
+
+  x = rect->x;
+  y = rect->y;
+  width = rect->width;
+  height = rect->height;
+
+  x1 = x;
+  x2 = x1 + width;
+  y1 = y;
+  y2 = y1 + height;
+
+  x_radius = MIN (x_radius, width / 2.0);
+  y_radius = MIN (y_radius, width / 2.0);
+
+  xr1 = x_radius;
+  xr2 = x_radius / 2.0;
+  yr1 = y_radius;
+  yr2 = y_radius / 2.0;
+
+  cairo_move_to (cr, x1 + xr1, y1);
+  cairo_line_to (cr, x2 - xr1, y1);
+  cairo_curve_to (cr, x2 - xr2, y1, x2, y1 + yr2, x2, y1 + yr1);
+  cairo_line_to (cr, x2, y2 - yr1);
+  cairo_curve_to (cr, x2, y2 - yr2, x2 - xr2, y2, x2 - xr1, y2);
+  cairo_line_to (cr, x1 + xr1, y2);
+  cairo_curve_to (cr, x1 + xr2, y2, x1, y2 - yr2, x1, y2 - yr1);
+  cairo_line_to (cr, x1, y1 + yr1);
+  cairo_curve_to (cr, x1, y1 + yr2, x1 + xr2, y1, x1 + xr1, y1);
+  cairo_close_path (cr);
+}
diff --git a/src/libsysprof-ui/sysprof-cell-renderer-duration.c 
b/src/libsysprof-ui/sysprof-cell-renderer-duration.c
index c79287f..4a3ff73 100644
--- a/src/libsysprof-ui/sysprof-cell-renderer-duration.c
+++ b/src/libsysprof-ui/sysprof-cell-renderer-duration.c
@@ -23,6 +23,7 @@
 #include "config.h"
 
 #include "sysprof-cell-renderer-duration.h"
+#include "sysprof-ui-private.h"
 #include "sysprof-zoom-manager.h"
 
 #define NSEC_PER_SEC (G_USEC_PER_SEC * 1000L)
@@ -99,13 +100,32 @@ sysprof_cell_renderer_duration_render (GtkCellRenderer      *renderer,
     x2 = x1;
 
   r.x = cell_area->x + x1;
-  r.height = 10;
-  r.y = cell_area->y + (cell_area->height - r.height) / 2.0;
+  r.height = 12;
+  r.y = cell_area->y + (cell_area->height - r.height) / 2;
   r.width = MAX (1.0, x2 - x1);
 
-  gdk_cairo_rectangle (cr, &r);
+  if ((cell_area->height - r.height) % 2 == 1)
+    r.height++;
+
   gdk_cairo_set_source_rgba (cr, &rgba);
-  cairo_fill (cr);
+
+  if (r.width > 3)
+    {
+      _sysprof_rounded_rectangle (cr, &r, 2, 2);
+      cairo_fill (cr);
+    }
+  else if (r.width > 1)
+    {
+      gdk_cairo_rectangle (cr, &r);
+      cairo_fill (cr);
+    }
+  else
+    {
+      cairo_set_line_width (cr, 1);
+      cairo_move_to (cr, r.x, r.y);
+      cairo_line_to (cr, r.x, r.y + r.height);
+      cairo_stroke (cr);
+    }
 
   str = g_string_new (priv->text);