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diff --git a/libs/cairo-1.16.0/src/cairo-font-face.c b/libs/cairo-1.16.0/src/cairo-font-face.c
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+++ b/libs/cairo-1.16.0/src/cairo-font-face.c
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+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2002 University of Southern California
+ * Copyright © 2005 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is University of Southern
+ * California.
+ *
+ * Contributor(s):
+ *	Carl D. Worth <cworth@cworth.org>
+ *      Graydon Hoare <graydon@redhat.com>
+ *      Owen Taylor <otaylor@redhat.com>
+ */
+
+#include "cairoint.h"
+#include "cairo-error-private.h"
+
+/**
+ * SECTION:cairo-font-face
+ * @Title: cairo_font_face_t
+ * @Short_Description: Base class for font faces
+ * @See_Also: #cairo_scaled_font_t
+ *
+ * #cairo_font_face_t represents a particular font at a particular weight,
+ * slant, and other characteristic but no size, transformation, or size.
+ *
+ * Font faces are created using <firstterm>font-backend</firstterm>-specific
+ * constructors, typically of the form
+ * <function>cairo_<emphasis>backend</emphasis>_font_face_create(<!-- -->)</function>,
+ * or implicitly using the <firstterm>toy</firstterm> text API by way of
+ * cairo_select_font_face().  The resulting face can be accessed using
+ * cairo_get_font_face().
+ **/
+
+/* #cairo_font_face_t */
+
+const cairo_font_face_t _cairo_font_face_nil = {
+    { 0 },				/* hash_entry */
+    CAIRO_STATUS_NO_MEMORY,		/* status */
+    CAIRO_REFERENCE_COUNT_INVALID,	/* ref_count */
+    { 0, 0, 0, NULL },			/* user_data */
+    NULL
+};
+const cairo_font_face_t _cairo_font_face_nil_file_not_found = {
+    { 0 },				/* hash_entry */
+    CAIRO_STATUS_FILE_NOT_FOUND,	/* status */
+    CAIRO_REFERENCE_COUNT_INVALID,	/* ref_count */
+    { 0, 0, 0, NULL },			/* user_data */
+    NULL
+};
+
+cairo_status_t
+_cairo_font_face_set_error (cairo_font_face_t *font_face,
+	                    cairo_status_t     status)
+{
+    if (status == CAIRO_STATUS_SUCCESS)
+	return status;
+
+    /* Don't overwrite an existing error. This preserves the first
+     * error, which is the most significant. */
+    _cairo_status_set_error (&font_face->status, status);
+
+    return _cairo_error (status);
+}
+
+void
+_cairo_font_face_init (cairo_font_face_t               *font_face,
+		       const cairo_font_face_backend_t *backend)
+{
+    CAIRO_MUTEX_INITIALIZE ();
+
+    font_face->status = CAIRO_STATUS_SUCCESS;
+    CAIRO_REFERENCE_COUNT_INIT (&font_face->ref_count, 1);
+    font_face->backend = backend;
+
+    _cairo_user_data_array_init (&font_face->user_data);
+}
+
+/**
+ * cairo_font_face_reference:
+ * @font_face: a #cairo_font_face_t, (may be %NULL in which case this
+ * function does nothing).
+ *
+ * Increases the reference count on @font_face by one. This prevents
+ * @font_face from being destroyed until a matching call to
+ * cairo_font_face_destroy() is made.
+ *
+ * Use cairo_font_face_get_reference_count() to get the number of
+ * references to a #cairo_font_face_t.
+ *
+ * Return value: the referenced #cairo_font_face_t.
+ *
+ * Since: 1.0
+ **/
+cairo_font_face_t *
+cairo_font_face_reference (cairo_font_face_t *font_face)
+{
+    if (font_face == NULL ||
+	CAIRO_REFERENCE_COUNT_IS_INVALID (&font_face->ref_count))
+	return font_face;
+
+    /* We would normally assert that we have a reference here but we
+     * can't get away with that due to the zombie case as documented
+     * in _cairo_ft_font_face_destroy. */
+
+    _cairo_reference_count_inc (&font_face->ref_count);
+
+    return font_face;
+}
+slim_hidden_def (cairo_font_face_reference);
+
+static inline cairo_bool_t
+__put(cairo_reference_count_t *v)
+{
+    int c, old;
+
+    c = CAIRO_REFERENCE_COUNT_GET_VALUE(v);
+    while (c != 1 && (old = _cairo_atomic_int_cmpxchg_return_old(&v->ref_count, c, c - 1)) != c)
+	c = old;
+
+    return c != 1;
+}
+
+cairo_bool_t
+_cairo_font_face_destroy (void *abstract_face)
+{
+#if 0 /* Nothing needs to be done, we can just drop the last reference */
+    cairo_font_face_t *font_face = abstract_face;
+    return _cairo_reference_count_dec_and_test (&font_face->ref_count);
+#endif
+    return TRUE;
+}
+
+/**
+ * cairo_font_face_destroy:
+ * @font_face: a #cairo_font_face_t
+ *
+ * Decreases the reference count on @font_face by one. If the result
+ * is zero, then @font_face and all associated resources are freed.
+ * See cairo_font_face_reference().
+ *
+ * Since: 1.0
+ **/
+void
+cairo_font_face_destroy (cairo_font_face_t *font_face)
+{
+    if (font_face == NULL ||
+	CAIRO_REFERENCE_COUNT_IS_INVALID (&font_face->ref_count))
+	return;
+
+    assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&font_face->ref_count));
+
+    /* We allow resurrection to deal with some memory management for the
+     * FreeType backend where cairo_ft_font_face_t and cairo_ft_unscaled_font_t
+     * need to effectively mutually reference each other
+     */
+    if (__put (&font_face->ref_count))
+	return;
+
+    if (! font_face->backend->destroy (font_face))
+	return;
+
+    _cairo_user_data_array_fini (&font_face->user_data);
+
+    free (font_face);
+}
+slim_hidden_def (cairo_font_face_destroy);
+
+/**
+ * cairo_font_face_get_type:
+ * @font_face: a font face
+ *
+ * This function returns the type of the backend used to create
+ * a font face. See #cairo_font_type_t for available types.
+ *
+ * Return value: The type of @font_face.
+ *
+ * Since: 1.2
+ **/
+cairo_font_type_t
+cairo_font_face_get_type (cairo_font_face_t *font_face)
+{
+    if (CAIRO_REFERENCE_COUNT_IS_INVALID (&font_face->ref_count))
+	return CAIRO_FONT_TYPE_TOY;
+
+    return font_face->backend->type;
+}
+
+/**
+ * cairo_font_face_get_reference_count:
+ * @font_face: a #cairo_font_face_t
+ *
+ * Returns the current reference count of @font_face.
+ *
+ * Return value: the current reference count of @font_face.  If the
+ * object is a nil object, 0 will be returned.
+ *
+ * Since: 1.4
+ **/
+unsigned int
+cairo_font_face_get_reference_count (cairo_font_face_t *font_face)
+{
+    if (font_face == NULL ||
+	CAIRO_REFERENCE_COUNT_IS_INVALID (&font_face->ref_count))
+	return 0;
+
+    return CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->ref_count);
+}
+
+/**
+ * cairo_font_face_status:
+ * @font_face: a #cairo_font_face_t
+ *
+ * Checks whether an error has previously occurred for this
+ * font face
+ *
+ * Return value: %CAIRO_STATUS_SUCCESS or another error such as
+ *   %CAIRO_STATUS_NO_MEMORY.
+ *
+ * Since: 1.0
+ **/
+cairo_status_t
+cairo_font_face_status (cairo_font_face_t *font_face)
+{
+    return font_face->status;
+}
+
+/**
+ * cairo_font_face_get_user_data:
+ * @font_face: a #cairo_font_face_t
+ * @key: the address of the #cairo_user_data_key_t the user data was
+ * attached to
+ *
+ * Return user data previously attached to @font_face using the specified
+ * key.  If no user data has been attached with the given key this
+ * function returns %NULL.
+ *
+ * Return value: the user data previously attached or %NULL.
+ *
+ * Since: 1.0
+ **/
+void *
+cairo_font_face_get_user_data (cairo_font_face_t	   *font_face,
+			       const cairo_user_data_key_t *key)
+{
+    return _cairo_user_data_array_get_data (&font_face->user_data,
+					    key);
+}
+slim_hidden_def (cairo_font_face_get_user_data);
+
+/**
+ * cairo_font_face_set_user_data:
+ * @font_face: a #cairo_font_face_t
+ * @key: the address of a #cairo_user_data_key_t to attach the user data to
+ * @user_data: the user data to attach to the font face
+ * @destroy: a #cairo_destroy_func_t which will be called when the
+ * font face is destroyed or when new user data is attached using the
+ * same key.
+ *
+ * Attach user data to @font_face.  To remove user data from a font face,
+ * call this function with the key that was used to set it and %NULL
+ * for @data.
+ *
+ * Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY if a
+ * slot could not be allocated for the user data.
+ *
+ * Since: 1.0
+ **/
+cairo_status_t
+cairo_font_face_set_user_data (cairo_font_face_t	   *font_face,
+			       const cairo_user_data_key_t *key,
+			       void			   *user_data,
+			       cairo_destroy_func_t	    destroy)
+{
+    if (CAIRO_REFERENCE_COUNT_IS_INVALID (&font_face->ref_count))
+	return font_face->status;
+
+    return _cairo_user_data_array_set_data (&font_face->user_data,
+					    key, user_data, destroy);
+}
+slim_hidden_def (cairo_font_face_set_user_data);
+
+void
+_cairo_unscaled_font_init (cairo_unscaled_font_t               *unscaled_font,
+			   const cairo_unscaled_font_backend_t *backend)
+{
+    CAIRO_REFERENCE_COUNT_INIT (&unscaled_font->ref_count, 1);
+    unscaled_font->backend = backend;
+}
+
+cairo_unscaled_font_t *
+_cairo_unscaled_font_reference (cairo_unscaled_font_t *unscaled_font)
+{
+    if (unscaled_font == NULL)
+	return NULL;
+
+    assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&unscaled_font->ref_count));
+
+    _cairo_reference_count_inc (&unscaled_font->ref_count);
+
+    return unscaled_font;
+}
+
+void
+_cairo_unscaled_font_destroy (cairo_unscaled_font_t *unscaled_font)
+{
+    if (unscaled_font == NULL)
+	return;
+
+    assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&unscaled_font->ref_count));
+
+    if (__put (&unscaled_font->ref_count))
+	return;
+
+    if (! unscaled_font->backend->destroy (unscaled_font))
+	return;
+
+    free (unscaled_font);
+}