From 530ffd0b7d3c39757b20f00716e486b5caf89aff Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Wed, 12 Oct 2022 12:03:23 -0500
Subject: add cairo

---
 libs/cairo-1.16.0/src/cairo-stroke-dash.c | 96 +++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 libs/cairo-1.16.0/src/cairo-stroke-dash.c

(limited to 'libs/cairo-1.16.0/src/cairo-stroke-dash.c')

diff --git a/libs/cairo-1.16.0/src/cairo-stroke-dash.c b/libs/cairo-1.16.0/src/cairo-stroke-dash.c
new file mode 100644
index 0000000..9494010
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-stroke-dash.c
@@ -0,0 +1,96 @@
+/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2002 University of Southern California
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is University of Southern
+ * California.
+ *
+ * Contributor(s):
+ *	Carl D. Worth <cworth@cworth.org>
+ *	Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-stroke-dash-private.h"
+
+void
+_cairo_stroker_dash_start (cairo_stroker_dash_t *dash)
+{
+    double offset;
+    cairo_bool_t on = TRUE;
+    unsigned int i = 0;
+
+    if (! dash->dashed)
+	return;
+
+    offset = dash->dash_offset;
+
+    /* We stop searching for a starting point as soon as the
+       offset reaches zero.  Otherwise when an initial dash
+       segment shrinks to zero it will be skipped over. */
+    while (offset > 0.0 && offset >= dash->dashes[i]) {
+	offset -= dash->dashes[i];
+	on = !on;
+	if (++i == dash->num_dashes)
+	    i = 0;
+    }
+
+    dash->dash_index = i;
+    dash->dash_on = dash->dash_starts_on = on;
+    dash->dash_remain = dash->dashes[i] - offset;
+}
+
+void
+_cairo_stroker_dash_step (cairo_stroker_dash_t *dash, double step)
+{
+    dash->dash_remain -= step;
+    if (dash->dash_remain < CAIRO_FIXED_ERROR_DOUBLE) {
+	if (++dash->dash_index == dash->num_dashes)
+	    dash->dash_index = 0;
+
+	dash->dash_on = ! dash->dash_on;
+	dash->dash_remain += dash->dashes[dash->dash_index];
+    }
+}
+
+void
+_cairo_stroker_dash_init (cairo_stroker_dash_t *dash,
+			  const cairo_stroke_style_t *style)
+{
+    dash->dashed = style->dash != NULL;
+    if (! dash->dashed)
+	return;
+
+    dash->dashes = style->dash;
+    dash->num_dashes = style->num_dashes;
+    dash->dash_offset = style->dash_offset;
+
+    _cairo_stroker_dash_start (dash);
+}
-- 
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