Add large-font test to exercise a cairo-xlib bug.

The original bug report is here:

	corrupt glyph positions with large font
	https://bugzilla.redhat.com/show_bug.cgi?id=448104

test/.gitignore

@@ -92,6 +92,7 @@ infinite-join
 in-fill-empty-trapezoid
 in-fill-trapezoid
 invalid-matrix
+large-font
 large-source
 leaky-dash
 leaky-dashed-rectangle

test/Makefile.am

@@ -71,6 +71,7 @@ infinite-join$(EXEEXT)					\
 in-fill-empty-trapezoid$(EXEEXT)			\
 in-fill-trapezoid$(EXEEXT)				\
 invalid-matrix$(EXEEXT)					\
+large-font$(EXEEXT)					\
 large-source$(EXEEXT)					\
 leaky-dash$(EXEEXT)					\
 leaky-dashed-rectangle$(EXEEXT)				\
@@ -441,6 +442,8 @@ REFERENCE_IMAGES = \
 	image-surface-source-ref.png \
 	infinite-join-ref.png	\
 	infinite-join-ps-ref.png	\
+	large-font-ref.png	\
+	large-font-ps-ref.png	\
 	large-source-ref.png	\
 	leaky-dash-ps-argb32-ref.png	\
 	leaky-dash-ps-rgb24-ref.png	\

test/large-font.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2008 Red Hat, Inc.
+ *
+ * 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: Carl D. Worth <cworth@cworth.org>
+ */
+
+/* Bug history:
+ *
+ * 2008-05-23: Caolan McNamara noticed a bug in OpenOffice.org where,
+ *             when using a very large font, space would be left for a
+ *	       glyph but it would actually be rendered in the wrong
+ *	       place. He wrote a minimal test case and posted the bug
+ *	       here:
+ *
+ *			corrupt glyph positions with large font
+ *			https://bugzilla.redhat.com/show_bug.cgi?id=448104
+ *
+ * 2008-05-23: Carl Worth wrote this test for the cairo test suite to
+ *             exercise the bug.k
+ */
+
+#include "cairo-test.h"
+
+#define WIDTH  400
+#define HEIGHT 200
+#define TEXT_SIZE 160
+
+static cairo_test_draw_function_t draw;
+
+cairo_test_t test = {
+    "large-font",
+    "Draws a very large font to exercise a glyph-positioning bug",
+    WIDTH, HEIGHT,
+    draw
+};
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    cairo_font_options_t *font_options;
+
+    /* paint white so we don't need separate ref images for
+     * RGB24 and ARGB32 */
+    cairo_set_source_rgb (cr, 1., 1., 1.);
+    cairo_paint (cr);
+
+    cairo_select_font_face (cr, "Bitstream Vera Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    cairo_set_font_size (cr, TEXT_SIZE);
+
+    font_options = cairo_font_options_create ();
+
+    cairo_get_font_options (cr, font_options);
+    cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF);
+
+    cairo_set_font_options (cr, font_options);
+    cairo_font_options_destroy (font_options);
+
+    cairo_set_source_rgb (cr, 0, 0, 0);
+
+    cairo_set_font_size (cr, 160);
+    cairo_move_to (cr, 5, 160);
+    cairo_show_text (cr, "MoW");
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test);
+}