[test] Verify current point position after subpath closure

Make sure cairo_close_path always takes the current point where it
should be.

test/Makefile.am

@@ -218,6 +218,7 @@ REFERENCE_IMAGES = \
 	close-path.ps2.ref.png \
 	close-path.ps3.ref.png \
 	close-path.ref.png \
+	close-path-current-point.ref.png \
 	composite-integer-translate-over.ps2.ref.png \
 	composite-integer-translate-over.ps3.ref.png \
 	composite-integer-translate-over.ref.png \

test/Makefile.sources

@@ -24,6 +24,7 @@ test_sources = \
 	clipped-group.c					\
 	clipped-surface.c				\
 	close-path.c					\
+	close-path-current-point.c			\
 	composite-integer-translate-source.c		\
 	composite-integer-translate-over.c		\
 	composite-integer-translate-over-repeat.c	\

test/close-path-current-point.c

@@ -0,0 +1,95 @@
+/*
+ * Copyright © 2009 Nis Martensen
+ *
+ * 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 the copyright holder
+ * not be used in advertising or publicity pertaining to distribution of
+ * the software without specific, written prior permission. The
+ * copyright holder makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is" without
+ * express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDER 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: Nis Martensen <nis.martensen@web.de>
+ */
+
+#include "cairo-test.h"
+
+#define SIZE 20
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    /* 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);
+
+    /* subpath starts with cairo_move_to */
+    cairo_new_sub_path (cr);
+    cairo_move_to (cr, SIZE, SIZE);
+    cairo_rel_line_to (cr, SIZE, 0);
+    cairo_rel_line_to (cr, 0, SIZE);
+    cairo_close_path (cr);
+    cairo_rel_line_to (cr, 0.5 * SIZE, SIZE);
+
+    /* subpath starts with cairo_line_to */
+    cairo_new_sub_path (cr);
+    cairo_line_to (cr, SIZE, 3 * SIZE);
+    cairo_rel_line_to (cr, SIZE, 0);
+    cairo_rel_line_to (cr, 0, SIZE);
+    cairo_close_path (cr);
+    cairo_rel_line_to (cr, 0, SIZE);
+
+    /* subpath starts with cairo_curve_to */
+    cairo_new_sub_path (cr);
+    cairo_curve_to (cr,
+		    SIZE, 5 * SIZE,
+		    1.5 * SIZE, 6 * SIZE,
+		    2 * SIZE, 5 * SIZE);
+    cairo_rel_line_to (cr, 0, SIZE);
+    cairo_close_path (cr);
+    cairo_rel_line_to (cr, -0.5 * SIZE, SIZE);
+
+    /* subpath starts with cairo_arc */
+    cairo_new_sub_path (cr);
+    cairo_arc (cr,
+	       1.5 * SIZE, 7 * SIZE,
+	       0.5 * SIZE,
+	       M_PI, 2 * M_PI);
+    cairo_rel_line_to (cr, 0, SIZE);
+    cairo_close_path (cr);
+    cairo_rel_line_to (cr, -0.7 * SIZE, 0.7 * SIZE);
+
+    /* subpath starts with cairo_arc_negative */
+    cairo_new_sub_path (cr);
+    cairo_arc_negative (cr,
+			1.5 * SIZE, 9 * SIZE,
+			0.5 * SIZE,
+			M_PI, 2 * M_PI);
+    cairo_rel_line_to (cr, 0, SIZE);
+    cairo_close_path (cr);
+    cairo_rel_line_to (cr, -0.8 * SIZE, 0.3 * SIZE);
+
+    cairo_stroke (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (close_path_current_point,
+	    "Test some corner cases related to cairo path operations and the current point",
+	    "path", /* keywords */
+	    NULL, /* requirements */
+	    3 * SIZE, 11 * SIZE,
+	    NULL, draw)