зеркало из https://github.com/mozilla/pjs.git
b=383960, Upgrade cairo to 1.4.8, r=me -- cairo 1.4.8: missed removing cairo-font.c
This commit is contained in:
vladimir@pobox.com
Родитель
c515dfa57b
Коммит
b0028855f4
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@ -70,7 +70,6 @@ CSRCS = \
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cairo-debug.c \
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cairo-deflate-stream.c \
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cairo-fixed.c \
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cairo-font.c \
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cairo-font-face.c \
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cairo-font-options.c \
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cairo-freelist.c \
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@ -1,516 +0,0 @@
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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
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/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2002 University of Southern California
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* Copyright © 2005 Red Hat Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
|
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is University of Southern
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* California.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@cworth.org>
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* Graydon Hoare <graydon@redhat.com>
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* Owen Taylor <otaylor@redhat.com>
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*/
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#include "cairoint.h"
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/* Forward declare so we can use it as an arbitrary backend for
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* _cairo_font_face_nil.
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*/
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static const cairo_font_face_backend_t _cairo_toy_font_face_backend;
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/* cairo_font_face_t */
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const cairo_font_face_t _cairo_font_face_nil = {
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{ 0 }, /* hash_entry */
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CAIRO_STATUS_NO_MEMORY, /* status */
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CAIRO_REF_COUNT_INVALID, /* ref_count */
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{ 0, 0, 0, NULL }, /* user_data */
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&_cairo_toy_font_face_backend
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};
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void
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_cairo_font_face_init (cairo_font_face_t *font_face,
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const cairo_font_face_backend_t *backend)
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{
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font_face->status = CAIRO_STATUS_SUCCESS;
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font_face->ref_count = 1;
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font_face->backend = backend;
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_cairo_user_data_array_init (&font_face->user_data);
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}
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/* This mutex protects both cairo_toy_font_hash_table as well as
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reference count manipulations for all cairo_font_face_t. */
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CAIRO_MUTEX_DECLARE (_cairo_font_face_mutex);
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/**
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* cairo_font_face_reference:
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* @font_face: a #cairo_font_face_t, (may be %NULL in which case this
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* function does nothing).
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*
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* Increases the reference count on @font_face by one. This prevents
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* @font_face from being destroyed until a matching call to
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* cairo_font_face_destroy() is made.
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*
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* The number of references to a #cairo_font_face_t can be get using
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* cairo_font_face_get_reference_count().
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*
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* Return value: the referenced #cairo_font_face_t.
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**/
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cairo_font_face_t *
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cairo_font_face_reference (cairo_font_face_t *font_face)
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{
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if (font_face == NULL || font_face->ref_count == CAIRO_REF_COUNT_INVALID)
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return font_face;
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CAIRO_MUTEX_LOCK (_cairo_font_face_mutex);
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/* We would normally assert (font_face->ref_count >0) here but we
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* can't get away with that due to the zombie case as documented
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* in _cairo_ft_font_face_destroy. */
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font_face->ref_count++;
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CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
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return font_face;
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}
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slim_hidden_def (cairo_font_face_reference);
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/**
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* cairo_font_face_destroy:
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* @font_face: a #cairo_font_face_t
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*
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* Decreases the reference count on @font_face by one. If the result
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* is zero, then @font_face and all associated resources are freed.
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* See cairo_font_face_reference().
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**/
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void
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cairo_font_face_destroy (cairo_font_face_t *font_face)
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{
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if (font_face == NULL || font_face->ref_count == CAIRO_REF_COUNT_INVALID)
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return;
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CAIRO_MUTEX_LOCK (_cairo_font_face_mutex);
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assert (font_face->ref_count > 0);
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if (--(font_face->ref_count) > 0) {
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CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
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return;
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}
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CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
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font_face->backend->destroy (font_face);
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/* We allow resurrection to deal with some memory management for the
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* FreeType backend where cairo_ft_font_face_t and cairo_ft_unscaled_font_t
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* need to effectively mutually reference each other
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*/
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if (font_face->ref_count > 0)
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return;
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_cairo_user_data_array_fini (&font_face->user_data);
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free (font_face);
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}
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slim_hidden_def (cairo_font_face_destroy);
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/**
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* cairo_font_face_get_type:
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* @font_face: a font face
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*
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* This function returns the type of the backend used to create
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* a font face. See #cairo_font_type_t for available types.
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*
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* Return value: The type of @font_face.
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*
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* Since: 1.2
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**/
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cairo_font_type_t
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cairo_font_face_get_type (cairo_font_face_t *font_face)
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{
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return font_face->backend->type;
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}
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/**
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* cairo_font_face_get_reference_count:
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* @font_face: a #cairo_font_face_t
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*
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* Returns the current reference count of @font_face.
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*
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* Return value: the current reference count of @font_face. If the
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* object is a nil object, 0 will be returned.
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*
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* Since: 1.4
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**/
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unsigned int
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cairo_font_face_get_reference_count (cairo_font_face_t *font_face)
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{
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if (font_face == NULL || font_face->ref_count == CAIRO_REF_COUNT_INVALID)
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return 0;
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return font_face->ref_count;
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}
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/**
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* cairo_font_face_status:
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* @font_face: a #cairo_font_face_t
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*
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* Checks whether an error has previously occurred for this
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* font face
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*
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* Return value: %CAIRO_STATUS_SUCCESS or another error such as
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* %CAIRO_STATUS_NO_MEMORY.
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**/
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cairo_status_t
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cairo_font_face_status (cairo_font_face_t *font_face)
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{
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return font_face->status;
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}
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/**
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* cairo_font_face_get_user_data:
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* @font_face: a #cairo_font_face_t
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* @key: the address of the #cairo_user_data_key_t the user data was
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* attached to
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*
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* Return user data previously attached to @font_face using the specified
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* key. If no user data has been attached with the given key this
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* function returns %NULL.
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*
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* Return value: the user data previously attached or %NULL.
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**/
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void *
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cairo_font_face_get_user_data (cairo_font_face_t *font_face,
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const cairo_user_data_key_t *key)
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{
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return _cairo_user_data_array_get_data (&font_face->user_data,
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key);
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}
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/**
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* cairo_font_face_set_user_data:
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* @font_face: a #cairo_font_face_t
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* @key: the address of a #cairo_user_data_key_t to attach the user data to
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* @user_data: the user data to attach to the font face
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* @destroy: a #cairo_destroy_func_t which will be called when the
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* font face is destroyed or when new user data is attached using the
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* same key.
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*
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* Attach user data to @font_face. To remove user data from a font face,
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* call this function with the key that was used to set it and %NULL
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* for @data.
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*
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* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY if a
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* slot could not be allocated for the user data.
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**/
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cairo_status_t
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cairo_font_face_set_user_data (cairo_font_face_t *font_face,
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const cairo_user_data_key_t *key,
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void *user_data,
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cairo_destroy_func_t destroy)
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{
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if (font_face->ref_count == CAIRO_REF_COUNT_INVALID)
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return CAIRO_STATUS_NO_MEMORY;
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return _cairo_user_data_array_set_data (&font_face->user_data,
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key, user_data, destroy);
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}
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static const cairo_font_face_backend_t _cairo_toy_font_face_backend;
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static int
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_cairo_toy_font_face_keys_equal (const void *key_a,
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const void *key_b);
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/* We maintain a hash table from family/weight/slant =>
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* cairo_font_face_t for cairo_toy_font_t. The primary purpose of
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* this mapping is to provide unique cairo_font_face_t values so that
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* our cache and mapping from cairo_font_face_t => cairo_scaled_font_t
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* works. Once the corresponding cairo_font_face_t objects fall out of
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* downstream caches, we don't need them in this hash table anymore.
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*
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* Modifications to this hash table are protected by
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* _cairo_font_face_mutex.
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*/
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static cairo_hash_table_t *cairo_toy_font_face_hash_table = NULL;
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static cairo_hash_table_t *
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_cairo_toy_font_face_hash_table_lock (void)
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{
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CAIRO_MUTEX_LOCK (_cairo_font_face_mutex);
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if (cairo_toy_font_face_hash_table == NULL)
|
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{
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cairo_toy_font_face_hash_table =
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_cairo_hash_table_create (_cairo_toy_font_face_keys_equal);
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if (cairo_toy_font_face_hash_table == NULL) {
|
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CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
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return NULL;
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}
|
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}
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return cairo_toy_font_face_hash_table;
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}
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static void
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_cairo_toy_font_face_hash_table_unlock (void)
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{
|
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CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
|
||||
}
|
||||
|
||||
/**
|
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* _cairo_toy_font_face_init_key:
|
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*
|
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* Initialize those portions of cairo_toy_font_face_t needed to use
|
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* it as a hash table key, including the hash code buried away in
|
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* font_face->base.hash_entry. No memory allocation is performed here
|
||||
* so that no fini call is needed. We do this to make it easier to use
|
||||
* an automatic cairo_toy_font_face_t variable as a key.
|
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**/
|
||||
static void
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||||
_cairo_toy_font_face_init_key (cairo_toy_font_face_t *key,
|
||||
const char *family,
|
||||
cairo_font_slant_t slant,
|
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cairo_font_weight_t weight)
|
||||
{
|
||||
unsigned long hash;
|
||||
|
||||
key->family = family;
|
||||
key->owns_family = FALSE;
|
||||
|
||||
key->slant = slant;
|
||||
key->weight = weight;
|
||||
|
||||
/* 1607 and 1451 are just a couple of arbitrary primes. */
|
||||
hash = _cairo_hash_string (family);
|
||||
hash += ((unsigned long) slant) * 1607;
|
||||
hash += ((unsigned long) weight) * 1451;
|
||||
|
||||
key->base.hash_entry.hash = hash;
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_toy_font_face_init (cairo_toy_font_face_t *font_face,
|
||||
const char *family,
|
||||
cairo_font_slant_t slant,
|
||||
cairo_font_weight_t weight)
|
||||
{
|
||||
char *family_copy;
|
||||
|
||||
family_copy = strdup (family);
|
||||
if (family_copy == NULL)
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
|
||||
_cairo_toy_font_face_init_key (font_face, family_copy,
|
||||
slant, weight);
|
||||
font_face->owns_family = TRUE;
|
||||
|
||||
_cairo_font_face_init (&font_face->base, &_cairo_toy_font_face_backend);
|
||||
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static void
|
||||
_cairo_toy_font_face_fini (cairo_toy_font_face_t *font_face)
|
||||
{
|
||||
/* We assert here that we own font_face->family before casting
|
||||
* away the const qualifer. */
|
||||
assert (font_face->owns_family);
|
||||
free ((char*) font_face->family);
|
||||
}
|
||||
|
||||
static int
|
||||
_cairo_toy_font_face_keys_equal (const void *key_a,
|
||||
const void *key_b)
|
||||
{
|
||||
const cairo_toy_font_face_t *face_a = key_a;
|
||||
const cairo_toy_font_face_t *face_b = key_b;
|
||||
|
||||
return (strcmp (face_a->family, face_b->family) == 0 &&
|
||||
face_a->slant == face_b->slant &&
|
||||
face_a->weight == face_b->weight);
|
||||
}
|
||||
|
||||
/**
|
||||
* _cairo_toy_font_face_create:
|
||||
* @family: a font family name, encoded in UTF-8
|
||||
* @slant: the slant for the font
|
||||
* @weight: the weight for the font
|
||||
*
|
||||
* Creates a font face from a triplet of family, slant, and weight.
|
||||
* These font faces are used in implementation of the the #cairo_t "toy"
|
||||
* font API.
|
||||
*
|
||||
* Return value: a newly created #cairo_font_face_t, destroy with
|
||||
* cairo_font_face_destroy()
|
||||
**/
|
||||
cairo_font_face_t *
|
||||
_cairo_toy_font_face_create (const char *family,
|
||||
cairo_font_slant_t slant,
|
||||
cairo_font_weight_t weight)
|
||||
{
|
||||
cairo_status_t status;
|
||||
cairo_toy_font_face_t key, *font_face;
|
||||
cairo_hash_table_t *hash_table;
|
||||
|
||||
hash_table = _cairo_toy_font_face_hash_table_lock ();
|
||||
if (hash_table == NULL)
|
||||
goto UNWIND;
|
||||
|
||||
_cairo_toy_font_face_init_key (&key, family, slant, weight);
|
||||
|
||||
/* Return existing font_face if it exists in the hash table. */
|
||||
if (_cairo_hash_table_lookup (hash_table,
|
||||
&key.base.hash_entry,
|
||||
(cairo_hash_entry_t **) &font_face))
|
||||
{
|
||||
/* We increment the reference count here manually to avoid
|
||||
double-locking. */
|
||||
font_face->base.ref_count++;
|
||||
_cairo_toy_font_face_hash_table_unlock ();
|
||||
return &font_face->base;
|
||||
}
|
||||
|
||||
/* Otherwise create it and insert into hash table. */
|
||||
font_face = malloc (sizeof (cairo_toy_font_face_t));
|
||||
if (font_face == NULL)
|
||||
goto UNWIND_HASH_TABLE_LOCK;
|
||||
|
||||
status = _cairo_toy_font_face_init (font_face, family, slant, weight);
|
||||
if (status)
|
||||
goto UNWIND_FONT_FACE_MALLOC;
|
||||
|
||||
status = _cairo_hash_table_insert (hash_table, &font_face->base.hash_entry);
|
||||
if (status)
|
||||
goto UNWIND_FONT_FACE_INIT;
|
||||
|
||||
_cairo_toy_font_face_hash_table_unlock ();
|
||||
|
||||
return &font_face->base;
|
||||
|
||||
UNWIND_FONT_FACE_INIT:
|
||||
UNWIND_FONT_FACE_MALLOC:
|
||||
free (font_face);
|
||||
UNWIND_HASH_TABLE_LOCK:
|
||||
_cairo_toy_font_face_hash_table_unlock ();
|
||||
UNWIND:
|
||||
return (cairo_font_face_t*) &_cairo_font_face_nil;
|
||||
}
|
||||
|
||||
static void
|
||||
_cairo_toy_font_face_destroy (void *abstract_face)
|
||||
{
|
||||
cairo_toy_font_face_t *font_face = abstract_face;
|
||||
cairo_hash_table_t *hash_table;
|
||||
|
||||
if (font_face == NULL)
|
||||
return;
|
||||
|
||||
hash_table = _cairo_toy_font_face_hash_table_lock ();
|
||||
/* All created objects must have been mapped in the hash table. */
|
||||
assert (hash_table != NULL);
|
||||
|
||||
_cairo_hash_table_remove (hash_table, &font_face->base.hash_entry);
|
||||
|
||||
_cairo_toy_font_face_hash_table_unlock ();
|
||||
|
||||
_cairo_toy_font_face_fini (font_face);
|
||||
}
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_toy_font_face_scaled_font_create (void *abstract_font_face,
|
||||
const cairo_matrix_t *font_matrix,
|
||||
const cairo_matrix_t *ctm,
|
||||
const cairo_font_options_t *options,
|
||||
cairo_scaled_font_t **scaled_font)
|
||||
{
|
||||
cairo_toy_font_face_t *font_face = abstract_font_face;
|
||||
const cairo_scaled_font_backend_t * backend = CAIRO_SCALED_FONT_BACKEND_DEFAULT;
|
||||
|
||||
return backend->create_toy (font_face,
|
||||
font_matrix, ctm, options, scaled_font);
|
||||
}
|
||||
|
||||
static const cairo_font_face_backend_t _cairo_toy_font_face_backend = {
|
||||
CAIRO_FONT_TYPE_TOY,
|
||||
_cairo_toy_font_face_destroy,
|
||||
_cairo_toy_font_face_scaled_font_create
|
||||
};
|
||||
|
||||
void
|
||||
_cairo_unscaled_font_init (cairo_unscaled_font_t *unscaled_font,
|
||||
const cairo_unscaled_font_backend_t *backend)
|
||||
{
|
||||
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;
|
||||
|
||||
unscaled_font->ref_count++;
|
||||
|
||||
return unscaled_font;
|
||||
}
|
||||
|
||||
void
|
||||
_cairo_unscaled_font_destroy (cairo_unscaled_font_t *unscaled_font)
|
||||
{
|
||||
if (unscaled_font == NULL)
|
||||
return;
|
||||
|
||||
if (--(unscaled_font->ref_count) > 0)
|
||||
return;
|
||||
|
||||
unscaled_font->backend->destroy (unscaled_font);
|
||||
|
||||
free (unscaled_font);
|
||||
}
|
||||
|
||||
void
|
||||
_cairo_font_reset_static_data (void)
|
||||
{
|
||||
_cairo_scaled_font_map_destroy ();
|
||||
|
||||
/* We manually acquire the lock rather than calling
|
||||
* cairo_toy_font_face_hash_table_lock simply to avoid
|
||||
* creating the table only to destroy it again. */
|
||||
CAIRO_MUTEX_LOCK (_cairo_font_face_mutex);
|
||||
_cairo_hash_table_destroy (cairo_toy_font_face_hash_table);
|
||||
cairo_toy_font_face_hash_table = NULL;
|
||||
CAIRO_MUTEX_UNLOCK (_cairo_font_face_mutex);
|
||||
}
|
||||
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