test: Exercise scan converters with large rounded rectangles.

Having added a specialised scan converter on the premise that it should
be better at handling rounded rectangles, ensure that they are indeed
rendered correctly.

test/Makefile.am

@@ -836,6 +836,8 @@ REFERENCE_IMAGES = \
 	rotated-clip.ref.png \
 	rotated-clip.ps.ref.png \
 	rotated-clip.xlib.ref.png \
+	rounded-rectangle-fill.xlib.ref.png \
+	rounded-rectangle-stroke.xlib.ref.png \
 	scale-down-source-surface-paint.ref.png \
 	scale-offset-image.gl.ref.png \
 	scale-offset-image.pdf.argb32.ref.png \

test/Makefile.sources

@@ -182,6 +182,8 @@ test_sources = \
 	rgb24-ignore-alpha.c				\
 	rotate-image-surface-paint.c			\
 	rotated-clip.c					\
+	rounded-rectangle-fill.c			\
+	rounded-rectangle-stroke.c			\
 	scale-down-source-surface-paint.c		\
 	scale-offset-image.c				\
 	scale-offset-similar.c				\

test/rounded-rectangle-fill.c

@@ -0,0 +1,65 @@
+/*
+ * Copyright © 2009 Chris Wilson
+ *
+ * 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 SIZE 80
+
+/* A very simple test to exercise the scan rasterisers with constant regions. */
+
+static void
+rounded_rectangle (cairo_t *cr, int x, int y, int w, int h, int r)
+{
+    cairo_new_sub_path (cr);
+    cairo_arc (cr, x + r, y + r, r, M_PI, 3 * M_PI / 2);
+    cairo_arc (cr, x + w - r, y + r, r, 3 *M_PI / 2, 2 * M_PI);
+    cairo_arc (cr, x + w - r, y + h - r, r, 0, M_PI / 2);
+    cairo_arc (cr, x + r, y + h - r, r, M_PI / 2, M_PI);
+    cairo_close_path (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    /* Paint background white, then draw in black. */
+    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+    cairo_paint (cr);
+    cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
+
+    cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
+    rounded_rectangle (cr, 5, 5, width-10, height-10, 15);
+    rounded_rectangle (cr, 15, 15, width-30, height-30, 5);
+    cairo_fill (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (rounded_rectangle_fill,
+	    "Tests handling of rounded rectangles, the UI designers favourite",
+	    "fill, rounded-rectangle", /* keywords */
+	    NULL, /* requirements */
+	    SIZE, SIZE,
+	    NULL, draw)

test/rounded-rectangle-stroke.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright © 2009 Chris Wilson
+ *
+ * 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 SIZE 80
+
+/* A very simple test to exercise the scan rasterisers with constant regions. */
+
+static void
+rounded_rectangle (cairo_t *cr, int x, int y, int w, int h, int r)
+{
+    cairo_new_sub_path (cr);
+    cairo_arc (cr, x + r, y + r, r, M_PI, 3 * M_PI / 2);
+    cairo_arc (cr, x + w - r, y + r, r, 3 *M_PI / 2, 2 * M_PI);
+    cairo_arc (cr, x + w - r, y + h - r, r, 0, M_PI / 2);
+    cairo_arc (cr, x + r, y + h - r, r, M_PI / 2, M_PI);
+    cairo_close_path (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    /* Paint background white, then draw in black. */
+    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+    cairo_paint (cr);
+    cairo_set_source_rgb (cr, 0.0, 0.0, 0.0); /* black */
+
+    cairo_set_line_width (cr, 10);
+    rounded_rectangle (cr, 10, 10, width-20, height-20, 10);
+    cairo_stroke (cr);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (rounded_rectangle_stroke,
+	    "Tests handling of rounded rectangles, the UI designers favourite",
+	    "stroke, rounded-rectangle", /* keywords */
+	    NULL, /* requirements */
+	    SIZE, SIZE,
+	    NULL, draw)