1 files changed, 95 insertions, 0 deletions
diff --git a/test/clipped-trapezoids.c b/test/clipped-trapezoids.c
new file mode 100644
index 00000000..1f96daa8
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+++ b/test/clipped-trapezoids.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2008 Chris Wilson
+ *
+ * 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
+ * Chris Wilson not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Chris Wilson makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairo-test.h"
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    double dash[2] = { 8, 4 };
+    double radius;
+
+    radius = width;
+    if (height > radius)
+	radius = height;
+
+    /* fill the background using a big circle */
+    cairo_arc (cr, 0, 0, 4 * radius, 0, 2 * M_PI);
+    cairo_fill (cr);
+
+    /* a rotated square - overlapping the corners */
+    cairo_save (cr);
+    cairo_save (cr);
+    cairo_translate (cr, width/2, height/2);
+    cairo_rotate (cr, M_PI/4);
+    cairo_scale (cr, M_SQRT2, M_SQRT2);
+    cairo_rectangle (cr, -width/2, -height/2, width, height);
+    cairo_restore (cr);
+    cairo_set_source_rgba (cr, 0, 1, 0, .5);
+    cairo_set_line_width (cr, radius/2);
+    cairo_stroke (cr);
+    cairo_restore (cr);
+
+    /* and put some circles in the corners */
+    cairo_set_source_rgb (cr, 1, 1, 1);
+    cairo_new_sub_path (cr);
+    cairo_arc (cr, 0, 0, radius/4, 0, 2 * M_PI);
+    cairo_new_sub_path (cr);
+    cairo_arc (cr, width, 0, radius/4, 0, 2 * M_PI);
+    cairo_new_sub_path (cr);
+    cairo_arc (cr, width, height, radius/4, 0, 2 * M_PI);
+    cairo_new_sub_path (cr);
+    cairo_arc (cr, 0, height, radius/4, 0, 2 * M_PI);
+    cairo_fill (cr);
+
+    /* a couple of pixel-aligned lines */
+    cairo_set_source_rgb (cr, 0, 0, 1);
+    cairo_move_to (cr, width/2, -height);
+    cairo_rel_line_to (cr, 0, 3*height);
+    cairo_move_to (cr, -width, height/2);
+    cairo_rel_line_to (cr, 3*width, 0);
+    cairo_stroke (cr);
+
+    /* a couple of dashed diagonals */
+    cairo_save (cr);
+    cairo_set_source_rgb (cr, 1, 0, 0);
+    cairo_set_dash (cr, dash, 2, 0);
+    cairo_set_line_width (cr, 4.);
+    cairo_move_to (cr, -width, -height);
+    cairo_line_to (cr, width+width, height+height);
+    cairo_move_to (cr, width+width, -height);
+    cairo_line_to (cr, -width, height+height);
+    cairo_stroke (cr);
+    cairo_restore (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (clipped_trapezoids,
+	    "Tests clipping of trapezoids larger than the surface",
+	    "clip", /* keywords */
+	    NULL, /* requirements */
+	    40, 40,
+	    NULL, draw)