test: Add stroke-clipped

Exercise a bug in the determine of clip-bounds when stroking, as
reported by ed44.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

3 files changed, 55 insertions, 0 deletions

diff --git a/test/Makefile.sources b/test/Makefile.sources
index fdf262c36..7dc8b889d 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -290,6 +290,7 @@ test_sources = \
 	scale-source-surface-paint.c			\
 	scaled-font-zero-matrix.c			\
 	stroke-ctm-caps.c				\
+	stroke-clipped.c			        \
 	stroke-image.c				        \
 	stroke-open-box.c				\
 	select-font-face.c				\
diff --git a/test/reference/stroke-clipped.ref.png b/test/reference/stroke-clipped.ref.png
new file mode 100644
index 000000000..3240cfe51
--- /dev/null
+++ b/test/reference/stroke-clipped.ref.png
diff --git a/test/stroke-clipped.c b/test/stroke-clipped.c
new file mode 100644
index 000000000..4b8079480
--- /dev/null
+++ b/test/stroke-clipped.c
@@ -0,0 +1,54 @@
+/*
+ * 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.
+ */
+
+#include "cairo-test.h"
+
+#define SIZE 200
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    int row;
+
+    cairo_set_source_rgb(cr, 1, 1, 1);
+    cairo_paint(cr);
+
+    cairo_set_source_rgb(cr, 1, 0, 0);
+    for(row = 0; row < SIZE; row++) {
+	cairo_rectangle(cr, 0, row, SIZE, 1);
+	cairo_clip(cr);
+
+	cairo_arc(cr, SIZE/2, SIZE/2, SIZE/2-8, 0, 2*M_PI);
+	cairo_stroke(cr);
+
+	cairo_reset_clip(cr);
+    }
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (stroke_clipped,
+	    "Check that the stroke is accurately drawn through smaller clips",
+	    "stroke", /* keywords */
+	    NULL, /* requirements */
+	    SIZE, SIZE,
+	    NULL, draw)