add cairo

1 files changed, 107 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/fill-and-stroke-alpha-add.c b/libs/cairo-1.16.0/test/fill-and-stroke-alpha-add.c
new file mode 100644
index 0000000..55cd4c6
--- /dev/null
+++ b/libs/cairo-1.16.0/test/fill-and-stroke-alpha-add.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright © 2005 Red Hat, Inc.
+ * Copyright © 2006 Red Hat, Inc.
+ *
+ * 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
+ * Red Hat, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Red Hat, Inc. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL RED HAT, INC. 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: Carl D. Worth <cworth@cworth.org>
+ */
+
+#include "cairo-test.h"
+
+#define PAD 2
+#define SIZE 10
+
+typedef void (*path_func_t) (cairo_t *cr);
+
+static void
+rectangle (cairo_t *cr)
+{
+    cairo_rectangle (cr, PAD, PAD, SIZE, SIZE);
+}
+
+static void
+circle (cairo_t *cr)
+{
+    cairo_arc (cr,
+	       PAD + SIZE / 2, PAD + SIZE / 2,
+	       SIZE / 2,
+	       0, 2 * M_PI);
+}
+
+/* Given a path-generating function and two possibly translucent
+ * patterns, fill and stroke the path with the patterns (to an
+ * offscreen group), then blend the result into the destination.
+ */
+static void
+fill_and_stroke (cairo_t		*cr,
+		 path_func_t		 path_func,
+		 cairo_pattern_t	*fill_pattern,
+		 cairo_pattern_t	*stroke_pattern)
+{
+    cairo_push_group (cr);
+    {
+	(path_func) (cr);
+	cairo_set_source (cr, fill_pattern);
+	cairo_fill_preserve (cr);
+
+	/* Use DEST_OUT to subtract stroke from fill. */
+	cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
+	cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OUT);
+	cairo_stroke_preserve (cr);
+
+	/* Then use ADD to draw the stroke without a seam. */
+	cairo_set_source (cr, stroke_pattern);
+	cairo_set_operator (cr, CAIRO_OPERATOR_ADD);
+	cairo_stroke (cr);
+    }
+    cairo_pop_group_to_source (cr);
+    cairo_paint (cr);
+}
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_pattern_t *blue;
+    cairo_pattern_t *red;
+
+    blue = cairo_pattern_create_rgba (0.0, 0.0, 1.0, 0.8);
+    red = cairo_pattern_create_rgba (1.0, 0.0, 0.0, 0.2);
+
+    cairo_test_paint_checkered (cr);
+
+    fill_and_stroke (cr, rectangle, blue, red);
+
+    cairo_translate (cr, SIZE + 2 * PAD, 0);
+
+    fill_and_stroke (cr, circle, red, blue);
+
+    cairo_pattern_destroy (blue);
+    cairo_pattern_destroy (red);
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (fill_and_stroke_alpha_add,
+	    "Use a group to fill/stroke a path (each with different alpha) using DEST_OUT and ADD to combine",
+	    "fill-and-stroke, fill, stroke", /* keywords */
+	    NULL, /* requirements */
+	    2 * SIZE + 4 * PAD, SIZE + 2 * PAD,
+	    NULL, draw)