add cairo

1 files changed, 81 insertions, 0 deletions

diff --git a/libs/cairo-1.16.0/test/glyph-cache-pressure.c b/libs/cairo-1.16.0/test/glyph-cache-pressure.c
new file mode 100644
index 0000000..eb4f7c5
--- /dev/null
+++ b/libs/cairo-1.16.0/test/glyph-cache-pressure.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright © 2005 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"
+#include "cairo-boilerplate-scaled-font.h"
+
+#define TEXT_SIZE 12
+
+/* Bug history
+ *
+ * 2006-06-22  Carl Worth  <cworth@cworth.org>
+ *
+ *   This is a test case to demonstrate the following bug in the xlib backend:
+ *
+ *	Some characters aren't displayed when using xlib (cache usage missing freeze/thaw)
+ *	https://bugs.freedesktop.org/show_bug.cgi?id=6955
+ *
+ *   We replicate this bug by using the cairo_scaled_font_set_max_glyphs_per_font
+ *   function to artificially induce cache pressure. (This function was added
+ *   for this very purpose.)
+ *
+ * 2006-06-22  Carl Worth  <cworth@cworth.org>
+ *
+ *   Bug was simple enough to solve by just adding a freeze/thaw pair
+ *   around the scaled_font's glyph cache in
+ *   _cairo_xlib_surface_show_glyphs, (I went ahead and added
+ *   _cairo_sacled_font_freeze/thaw_cache functions for this).
+ */
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    /* We draw in the default black, so paint white first. */
+    cairo_save (cr);
+    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
+    cairo_paint (cr);
+    cairo_restore (cr);
+
+    cairo_select_font_face (cr, CAIRO_TEST_FONT_FAMILY " Sans",
+			    CAIRO_FONT_SLANT_NORMAL,
+			    CAIRO_FONT_WEIGHT_NORMAL);
+    cairo_set_font_size (cr, TEXT_SIZE);
+
+    cairo_set_source_rgb (cr, 0, 0, 0); /* black */
+
+    cairo_boilerplate_scaled_font_set_max_glyphs_cached (cairo_get_scaled_font (cr), 1);
+
+    cairo_move_to (cr, 1, TEXT_SIZE);
+    cairo_show_text (cr, "the five boxing wizards jump quickly");
+
+    return CAIRO_TEST_SUCCESS;
+}
+
+CAIRO_TEST (glyph_cache_pressure,
+	    "Ensure that all backends behave well under artificial glyph cache pressure",
+	    "stress", /* keywords */
+	    NULL, /* requirements */
+	    223, TEXT_SIZE + 4,
+	    NULL, draw)