[cairo-font-options] Treat NULL as a default cairo_font_options_t

Interpret a NULL cairo_font_options_t as the default values - i.e
as if it were a fresh pointer returned by cairo_font_options_create().

1 files changed, 91 insertions, 0 deletions

diff --git a/test/font-options.c b/test/font-options.c
new file mode 100644
index 000000000..fdcde151b
--- /dev/null
+++ b/test/font-options.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright © 2008 Chris Wilson
+ *
+ * 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
+ * Chris Wilson not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Chris Wilson makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL CHRIS WILSON 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: Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include <cairo.h>
+#include <assert.h>
+#include <stdlib.h>
+
+int
+main (void)
+{
+    cairo_font_options_t *options1;
+    cairo_font_options_t *options2;
+    cairo_surface_t *surface;
+    cairo_matrix_t identity;
+    cairo_t *cr;
+    cairo_scaled_font_t *scaled_font;
+
+    /* first check NULL handling of cairo_font_options_t */
+    options1 = cairo_font_options_create ();
+    options2 = cairo_font_options_copy (NULL);
+
+    assert (cairo_font_options_equal (options1, options2));
+    assert (cairo_font_options_equal (NULL, options2));
+    assert (cairo_font_options_equal (options1, NULL));
+
+    assert (cairo_font_options_hash (options1) == cairo_font_options_hash (options2));
+    assert (cairo_font_options_hash (NULL) == cairo_font_options_hash (options2));
+    assert (cairo_font_options_hash (options1) == cairo_font_options_hash (NULL));
+
+    cairo_font_options_merge (NULL, NULL);
+    cairo_font_options_merge (options1, NULL);
+    cairo_font_options_merge (options1, options2);
+
+    cairo_font_options_destroy (NULL);
+    cairo_font_options_destroy (options1);
+    cairo_font_options_destroy (options2);
+
+    cairo_font_options_set_antialias (NULL, CAIRO_ANTIALIAS_DEFAULT);
+    cairo_font_options_get_antialias (NULL);
+
+    cairo_font_options_set_subpixel_order (NULL, CAIRO_SUBPIXEL_ORDER_DEFAULT);
+    cairo_font_options_get_subpixel_order (NULL);
+
+    cairo_font_options_set_hint_style (NULL, CAIRO_HINT_STYLE_DEFAULT);
+    cairo_font_options_get_hint_style (NULL);
+
+    cairo_font_options_set_hint_metrics (NULL, CAIRO_HINT_METRICS_DEFAULT);
+    cairo_font_options_get_hint_metrics (NULL);
+
+    /* Now try creating fonts with NULLs */
+    surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, 0, 0);
+    cr = cairo_create (surface);
+    cairo_surface_destroy (surface);
+
+    cairo_matrix_init_identity (&identity);
+    scaled_font = cairo_scaled_font_create (cairo_get_font_face (cr),
+	                                    &identity, &identity,
+					    NULL);
+    assert (cairo_scaled_font_status (scaled_font) == CAIRO_STATUS_SUCCESS);
+    cairo_scaled_font_get_font_options (scaled_font, NULL);
+    cairo_scaled_font_destroy (scaled_font);
+
+    cairo_set_font_options (cr, NULL);
+    cairo_get_font_options (cr, NULL);
+
+    cairo_destroy (cr);
+
+    return 0;
+}