test: Add a1-sample

Ensures that only a box that covers the centre pixel is filled with
antialiasing disabled.

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

test/Makefile.refs

@@ -17,6 +17,7 @@ REFERENCE_IMAGES = \
 	a1-rasterisation-rectangles.ref.png \
 	a1-rasterisation-triangles.quartz.xfail.png \
 	a1-rasterisation-triangles.ref.png \
+	a1-sample.ref.png \
 	a1-traps-sample.quartz.xfail.png \
 	a1-traps-sample.ref.png \
 	a8-clear.quartz.ref.png \

test/Makefile.sources

@@ -4,6 +4,7 @@ test_sources = \
 	a1-image-sample.c 				\
 	a1-mask.c					\
 	a1-mask-sample.c 				\
+	a1-sample.c	 				\
 	a1-traps-sample.c				\
 	a1-rasterisation.c				\
 	a8-clear.c					\

test/a1-sample.c

@@ -0,0 +1,59 @@
+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 WIDTH	(256) //CAIRO_FIXED_ONE
+#define HEIGHT	(WIDTH)
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    int i, j;
+
+    /* Fill background white */
+    cairo_set_source_rgb (cr, 1, 1, 1);
+    cairo_paint (cr);
+
+    cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
+    cairo_set_source_rgb (cr, 0, 0, 0);
+
+    /* Only the single rectangle that covers the centre pixel should be filled*/
+    for (i = 0; i < 256; i++)
+	for (j = 0; j < 256; j++) {
+	    cairo_rectangle (cr, i + i/256., j + j/256., 1/256., 1/256.);
+	    cairo_fill (cr);
+	}
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (a1_sample,
+	    "Tests unantialiased rendering of a quantum box",
+	    " alpha", /* keywords */
+	    "target=raster", /* requirements */
+	    WIDTH, HEIGHT,
+	    NULL, draw)