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/test/caps-tails-curve.c | 127 ++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 libs/cairo-1.16.0/test/caps-tails-curve.c

(limited to 'libs/cairo-1.16.0/test/caps-tails-curve.c')

diff --git a/libs/cairo-1.16.0/test/caps-tails-curve.c b/libs/cairo-1.16.0/test/caps-tails-curve.c
new file mode 100644
index 0000000..fa6aded
--- /dev/null
+++ b/libs/cairo-1.16.0/test/caps-tails-curve.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+#define LINE_WIDTH	30.
+#define SIZE		(2 * LINE_WIDTH)
+#define PAD		(2 * LINE_WIDTH)
+
+static void
+make_path (cairo_t *cr, double theta)
+{
+    double line_width = cairo_get_line_width (cr) / 4;
+
+    cairo_move_to (cr, 0, 0);
+    cairo_rel_curve_to (cr,
+			SIZE/3, -SIZE/4,
+			SIZE/3, -SIZE/4,
+			SIZE, 0);
+
+    cairo_rel_line_to (cr,
+		       cos (theta) * line_width,
+		       sin (theta) * line_width);
+}
+
+static void
+draw_joins (cairo_t *cr, double theta)
+{
+    make_path (cr, theta);
+    cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
+    cairo_stroke (cr);
+
+    cairo_translate (cr, SIZE + PAD, 0.);
+
+    make_path (cr, theta);
+    cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+    cairo_stroke (cr);
+
+    cairo_translate (cr, SIZE + PAD, 0.);
+
+    make_path (cr, theta);
+    cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
+    cairo_stroke (cr);
+
+    cairo_translate (cr, SIZE + PAD, 0.);
+}
+
+static void
+draw_caps_joins (cairo_t *cr, double theta)
+{
+    cairo_translate (cr, PAD, 0);
+    cairo_set_line_cap (cr, CAIRO_LINE_CAP_BUTT);
+    draw_joins (cr, theta);
+
+    cairo_translate (cr, PAD, 0);
+    cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+    draw_joins (cr, theta);
+
+    cairo_translate (cr, PAD, 0);
+    cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
+    draw_joins (cr, theta);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    const double theta[] = {
+	-M_PI/2, -M_PI/4, 0, M_PI/8, M_PI/3, M_PI
+    };
+    unsigned int t;
+
+    /* We draw in the default black, so paint white first. */
+    cairo_save (cr);
+    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_set_line_width (cr, LINE_WIDTH);
+
+    for (t = 0; t < ARRAY_LENGTH(theta); t++) {
+	cairo_save (cr);
+	cairo_translate (cr, 0, t * (SIZE + PAD) + PAD);
+	draw_caps_joins (cr, theta[t]);
+	cairo_restore (cr);
+
+	cairo_save (cr);
+	/* and reflect to generate the opposite vertex ordering */
+	cairo_translate (cr, 0, height - t * (SIZE + PAD) - PAD);
+	cairo_scale (cr, 1, -1);
+	draw_caps_joins (cr, theta[t]);
+	cairo_restore (cr);
+    }
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (caps_tails_curve,
+	    "Test caps and joins on short tail segments",
+	    "stroke, cap, join", /* keywords */
+	    NULL, /* requirements */
+	    9 * (PAD + SIZE) + 4*PAD,
+	    12 * (PAD + SIZE) + PAD,
+	    NULL, draw)
+
-- 
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