1 files changed, 95 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/test/thin-lines.c b/libs/cairo-1.16.0/test/thin-lines.c
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+++ b/libs/cairo-1.16.0/test/thin-lines.c
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+/*
+ * Copyright © 2015 Adrian Johnson
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Red Hat, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Red Hat, Inc. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+ * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Adrian Johnson <ajohnson@redneon.com>
+ */
+
+#include "cairo-test.h"
+
+#define CELL_WIDTH 20
+#define CELL_HEIGHT 20
+#define PAD 2
+#define IMAGE_WIDTH (CELL_WIDTH*3 + PAD*4)
+#define IMAGE_HEIGHT (CELL_HEIGHT*4 + PAD*5)
+
+
+static void
+draw_lines(cairo_t *cr)
+{
+    /* horizontal line */
+    cairo_translate (cr, PAD, PAD);
+    cairo_move_to (cr, 0, CELL_HEIGHT/2);
+    cairo_line_to (cr, CELL_WIDTH, CELL_HEIGHT/2);
+    cairo_stroke (cr);
+
+    /* vertical line */
+    cairo_translate (cr, 0, CELL_HEIGHT + PAD);
+    cairo_move_to (cr, CELL_WIDTH/2, 0);
+    cairo_line_to (cr, CELL_WIDTH/2, CELL_HEIGHT);
+    cairo_stroke (cr);
+
+    /* diagonal line */
+    cairo_translate (cr, 0, CELL_HEIGHT + PAD);
+    cairo_move_to (cr, 0, CELL_HEIGHT);
+    cairo_line_to (cr, CELL_WIDTH, 0);
+    cairo_stroke (cr);
+
+    /* curved line */
+    cairo_translate (cr, 0, CELL_HEIGHT + PAD);
+    cairo_move_to (cr, CELL_WIDTH, 0);
+    cairo_curve_to (cr, 0, 0,
+		    CELL_WIDTH, CELL_HEIGHT,
+		    0, CELL_HEIGHT);
+    cairo_stroke (cr);
+}
+
+#define FIXED_POINT_MIN (1.0/256)
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_save (cr);
+    cairo_set_line_width (cr, FIXED_POINT_MIN*10.0);
+    draw_lines (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, CELL_WIDTH + PAD, 0);
+    cairo_save (cr);
+    cairo_set_line_width (cr, FIXED_POINT_MIN);
+    draw_lines (cr);
+    cairo_restore (cr);
+
+    cairo_translate (cr, CELL_WIDTH + PAD, 0);
+    cairo_save (cr);
+    cairo_set_line_width (cr, FIXED_POINT_MIN/10.0);
+    draw_lines (cr);
+    cairo_restore (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (thin_lines,
+	    "Tests that very thin lines are output to vector surfaces",
+	    "stroke", /* keywords */
+	    NULL, /* requirements */
+	    IMAGE_WIDTH, IMAGE_HEIGHT,
+	    NULL, draw)