[cairo-commit] test/Makefile.sources test/radial-outer-focus.c

[Chris Wilson]

 test/Makefile.sources     |    1 
 test/radial-outer-focus.c |   69 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)

New commits:
commit f09361cff16776b49e9159c60eea4e8a049865d6
Author: Krzysztof Kosinski <tweenk.pl at gmail.com>
Date:   Fri Sep 16 15:59:38 2011 +0100

    test: Add radial-outer-focus
    
    Numerical instability in the computation of gradients leads to random
    results.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=40918

diff --git a/test/Makefile.sources b/test/Makefile.sources
index 9caa83a..9f7965b 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -234,6 +234,7 @@ test_sources = \
 	push-group-path-offset.c			\
 	radial-gradient.c				\
 	radial-gradient-extend.c			\
+	radial-outer-focus.c				\
 	random-clips.c			\
 	random-intersections-eo.c			\
 	random-intersections-nonzero.c			\
diff --git a/test/radial-outer-focus.c b/test/radial-outer-focus.c
new file mode 100644
index 0000000..4286219
--- /dev/null
+++ b/test/radial-outer-focus.c
@@ -0,0 +1,69 @@
+/*
+ * 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: Krzysztof Kosi\u0144ski <tweenk.pl at gmail.com>
+ */
+
+/* Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=40918 */
+
+#include "cairo-test.h"
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_pattern_t *radial;
+    double angle;
+    int i, j;
+
+    angle = 0.0;
+
+    for (i = 0; i < 4; i++) {
+	for (j = 0; j < 4; j++) {
+	    cairo_save (cr);
+	    cairo_rectangle (cr, 100*i, 100*j, 100, 100);
+	    cairo_clip (cr);
+
+	    radial = cairo_pattern_create_radial (cos (angle), sin (angle), 0,
+						  0, 0, 1);
+	    cairo_pattern_add_color_stop_rgb (radial, 0.0, 1, 0, 0);
+	    cairo_pattern_add_color_stop_rgb (radial, 1.0, 0, 1, 0);
+
+	    cairo_translate (cr, 100*i+50, 100*j+50);
+	    cairo_scale (cr, 50, -50);
+	    cairo_set_source (cr, radial);
+	    cairo_pattern_destroy (radial);
+
+	    cairo_paint(cr);
+	    cairo_restore (cr);
+
+	    angle += M_PI/17;
+	}
+    }
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (radial_outer_focus,
+	    "Exercises the condition of rendering a radial gradial on its outer focus",
+	    "radial", /* keywords */
+	    NULL, /* requirements */
+	    400, 400,
+	    NULL, draw)