forked from KolibriOS/kolibrios
3580 lines
100 KiB
C
3580 lines
100 KiB
C
/* -*- 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 © 2000 Keith Packard
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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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, 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 Red Hat, Inc.
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*
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* Contributor(s):
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* Graydon Hoare <graydon@redhat.com>
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* Owen Taylor <otaylor@redhat.com>
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* Keith Packard <keithp@keithp.com>
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* Carl Worth <cworth@cworth.org>
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*/
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#define _BSD_SOURCE /* for strdup() */
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#include "cairoint.h"
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#include "cairo-error-private.h"
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#include "cairo-image-surface-private.h"
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#include "cairo-ft-private.h"
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#include "cairo-pattern-private.h"
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#include "cairo-pixman-private.h"
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#include <float.h>
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#include "cairo-fontconfig-private.h"
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_OUTLINE_H
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#include FT_IMAGE_H
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#include FT_BITMAP_H
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#include FT_TRUETYPE_TABLES_H
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#include FT_XFREE86_H
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#if HAVE_FT_GLYPHSLOT_EMBOLDEN
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#include FT_SYNTHESIS_H
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#endif
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#if HAVE_FT_LIBRARY_SETLCDFILTER
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#include FT_LCD_FILTER_H
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#else
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#define access(p, m) 0
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#endif
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/* Fontconfig version older than 2.6 didn't have these options */
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#ifndef FC_LCD_FILTER
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#define FC_LCD_FILTER "lcdfilter"
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#endif
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/* Some Ubuntu versions defined FC_LCD_FILTER without defining the following */
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#ifndef FC_LCD_NONE
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#define FC_LCD_NONE 0
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#define FC_LCD_DEFAULT 1
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#define FC_LCD_LIGHT 2
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#define FC_LCD_LEGACY 3
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#endif
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/* FreeType version older than 2.3.5(?) didn't have these options */
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#ifndef FT_LCD_FILTER_NONE
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#define FT_LCD_FILTER_NONE 0
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#define FT_LCD_FILTER_DEFAULT 1
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#define FT_LCD_FILTER_LIGHT 2
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#define FT_LCD_FILTER_LEGACY 16
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#endif
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#define DOUBLE_TO_26_6(d) ((FT_F26Dot6)((d) * 64.0))
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#define DOUBLE_FROM_26_6(t) ((double)(t) / 64.0)
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#define DOUBLE_TO_16_16(d) ((FT_Fixed)((d) * 65536.0))
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#define DOUBLE_FROM_16_16(t) ((double)(t) / 65536.0)
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/* This is the max number of FT_face objects we keep open at once
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*/
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#define MAX_OPEN_FACES 10
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/**
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* SECTION:cairo-ft
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* @Title: FreeType Fonts
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* @Short_Description: Font support for FreeType
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* @See_Also: #cairo_font_face_t
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*
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* The FreeType font backend is primarily used to render text on GNU/Linux
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* systems, but can be used on other platforms too.
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**/
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/**
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* CAIRO_HAS_FT_FONT:
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*
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* Defined if the FreeType font backend is available.
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* This macro can be used to conditionally compile backend-specific code.
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*
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* Since: 1.0
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**/
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/**
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* CAIRO_HAS_FC_FONT:
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*
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* Defined if the Fontconfig-specific functions of the FreeType font backend
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* are available.
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* This macro can be used to conditionally compile backend-specific code.
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*
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* Since: 1.10
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**/
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/*
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* The simple 2x2 matrix is converted into separate scale and shape
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* factors so that hinting works right
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*/
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typedef struct _cairo_ft_font_transform {
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double x_scale, y_scale;
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double shape[2][2];
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} cairo_ft_font_transform_t;
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/*
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* We create an object that corresponds to a single font on the disk;
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* (identified by a filename/id pair) these are shared between all
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* fonts using that file. For cairo_ft_font_face_create_for_ft_face(), we
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* just create a one-off version with a permanent face value.
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*/
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typedef struct _cairo_ft_font_face cairo_ft_font_face_t;
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struct _cairo_ft_unscaled_font {
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cairo_unscaled_font_t base;
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cairo_bool_t from_face; /* was the FT_Face provided by user? */
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FT_Face face; /* provided or cached face */
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/* only set if from_face is false */
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char *filename;
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int id;
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/* We temporarily scale the unscaled font as needed */
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cairo_bool_t have_scale;
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cairo_matrix_t current_scale;
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double x_scale; /* Extracted X scale factor */
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double y_scale; /* Extracted Y scale factor */
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cairo_bool_t have_shape; /* true if the current scale has a non-scale component*/
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cairo_matrix_t current_shape;
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FT_Matrix Current_Shape;
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cairo_mutex_t mutex;
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int lock_count;
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cairo_ft_font_face_t *faces; /* Linked list of faces for this font */
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};
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static int
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_cairo_ft_unscaled_font_keys_equal (const void *key_a,
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const void *key_b);
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static void
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_cairo_ft_unscaled_font_fini (cairo_ft_unscaled_font_t *unscaled);
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typedef struct _cairo_ft_options {
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cairo_font_options_t base;
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unsigned int load_flags; /* flags for FT_Load_Glyph */
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unsigned int synth_flags;
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} cairo_ft_options_t;
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struct _cairo_ft_font_face {
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cairo_font_face_t base;
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cairo_ft_unscaled_font_t *unscaled;
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cairo_ft_options_t ft_options;
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cairo_ft_font_face_t *next;
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#if CAIRO_HAS_FC_FONT
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FcPattern *pattern; /* if pattern is set, the above fields will be NULL */
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cairo_font_face_t *resolved_font_face;
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FcConfig *resolved_config;
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#endif
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};
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static const cairo_unscaled_font_backend_t cairo_ft_unscaled_font_backend;
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#if CAIRO_HAS_FC_FONT
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static cairo_status_t
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_cairo_ft_font_options_substitute (const cairo_font_options_t *options,
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FcPattern *pattern);
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static cairo_font_face_t *
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_cairo_ft_resolve_pattern (FcPattern *pattern,
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const cairo_matrix_t *font_matrix,
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const cairo_matrix_t *ctm,
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const cairo_font_options_t *options);
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#endif
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/*
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* We maintain a hash table to map file/id => #cairo_ft_unscaled_font_t.
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* The hash table itself isn't limited in size. However, we limit the
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* number of FT_Face objects we keep around; when we've exceeded that
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* limit and need to create a new FT_Face, we dump the FT_Face from a
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* random #cairo_ft_unscaled_font_t which has an unlocked FT_Face, (if
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* there are any).
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*/
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typedef struct _cairo_ft_unscaled_font_map {
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cairo_hash_table_t *hash_table;
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FT_Library ft_library;
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int num_open_faces;
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} cairo_ft_unscaled_font_map_t;
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static cairo_ft_unscaled_font_map_t *cairo_ft_unscaled_font_map = NULL;
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static FT_Face
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_cairo_ft_unscaled_font_lock_face (cairo_ft_unscaled_font_t *unscaled);
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static void
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_cairo_ft_unscaled_font_unlock_face (cairo_ft_unscaled_font_t *unscaled);
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static cairo_bool_t
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_cairo_ft_scaled_font_is_vertical (cairo_scaled_font_t *scaled_font);
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static void
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_font_map_release_face_lock_held (cairo_ft_unscaled_font_map_t *font_map,
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cairo_ft_unscaled_font_t *unscaled)
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{
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if (unscaled->face) {
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FT_Done_Face (unscaled->face);
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unscaled->face = NULL;
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unscaled->have_scale = FALSE;
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font_map->num_open_faces--;
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}
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}
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static cairo_status_t
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_cairo_ft_unscaled_font_map_create (void)
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{
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cairo_ft_unscaled_font_map_t *font_map;
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/* This function is only intended to be called from
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* _cairo_ft_unscaled_font_map_lock. So we'll crash if we can
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* detect some other call path. */
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assert (cairo_ft_unscaled_font_map == NULL);
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font_map = malloc (sizeof (cairo_ft_unscaled_font_map_t));
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if (unlikely (font_map == NULL))
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return _cairo_error (CAIRO_STATUS_NO_MEMORY);
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font_map->hash_table =
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_cairo_hash_table_create (_cairo_ft_unscaled_font_keys_equal);
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if (unlikely (font_map->hash_table == NULL))
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goto FAIL;
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if (unlikely (FT_Init_FreeType (&font_map->ft_library)))
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goto FAIL;
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font_map->num_open_faces = 0;
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cairo_ft_unscaled_font_map = font_map;
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return CAIRO_STATUS_SUCCESS;
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FAIL:
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if (font_map->hash_table)
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_cairo_hash_table_destroy (font_map->hash_table);
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free (font_map);
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return _cairo_error (CAIRO_STATUS_NO_MEMORY);
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}
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static void
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_cairo_ft_unscaled_font_map_pluck_entry (void *entry, void *closure)
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{
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cairo_ft_unscaled_font_t *unscaled = entry;
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cairo_ft_unscaled_font_map_t *font_map = closure;
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_cairo_hash_table_remove (font_map->hash_table,
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&unscaled->base.hash_entry);
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if (! unscaled->from_face)
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_font_map_release_face_lock_held (font_map, unscaled);
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_cairo_ft_unscaled_font_fini (unscaled);
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free (unscaled);
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}
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static void
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_cairo_ft_unscaled_font_map_destroy (void)
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{
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cairo_ft_unscaled_font_map_t *font_map;
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CAIRO_MUTEX_LOCK (_cairo_ft_unscaled_font_map_mutex);
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font_map = cairo_ft_unscaled_font_map;
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cairo_ft_unscaled_font_map = NULL;
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CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex);
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if (font_map != NULL) {
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_cairo_hash_table_foreach (font_map->hash_table,
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_cairo_ft_unscaled_font_map_pluck_entry,
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font_map);
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assert (font_map->num_open_faces == 0);
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FT_Done_FreeType (font_map->ft_library);
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_cairo_hash_table_destroy (font_map->hash_table);
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free (font_map);
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}
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}
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static cairo_ft_unscaled_font_map_t *
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_cairo_ft_unscaled_font_map_lock (void)
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{
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CAIRO_MUTEX_LOCK (_cairo_ft_unscaled_font_map_mutex);
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if (unlikely (cairo_ft_unscaled_font_map == NULL)) {
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if (unlikely (_cairo_ft_unscaled_font_map_create ())) {
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CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex);
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return NULL;
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}
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}
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return cairo_ft_unscaled_font_map;
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}
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static void
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_cairo_ft_unscaled_font_map_unlock (void)
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{
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CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex);
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}
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static void
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_cairo_ft_unscaled_font_init_key (cairo_ft_unscaled_font_t *key,
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cairo_bool_t from_face,
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char *filename,
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int id,
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FT_Face face)
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{
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unsigned long hash;
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key->from_face = from_face;
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key->filename = filename;
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key->id = id;
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key->face = face;
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hash = _cairo_hash_string (filename);
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/* the constants are just arbitrary primes */
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hash += ((unsigned long) id) * 1607;
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hash += ((unsigned long) face) * 2137;
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key->base.hash_entry.hash = hash;
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}
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/**
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* _cairo_ft_unscaled_font_init:
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*
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* Initialize a #cairo_ft_unscaled_font_t.
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*
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* There are two basic flavors of #cairo_ft_unscaled_font_t, one
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* created from an FT_Face and the other created from a filename/id
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* pair. These two flavors are identified as from_face and !from_face.
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*
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* To initialize a from_face font, pass filename==%NULL, id=0 and the
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* desired face.
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*
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* To initialize a !from_face font, pass the filename/id as desired
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* and face==%NULL.
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*
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* Note that the code handles these two flavors in very distinct
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* ways. For example there is a hash_table mapping
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* filename/id->#cairo_unscaled_font_t in the !from_face case, but no
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* parallel in the from_face case, (where the calling code would have
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* to do its own mapping to ensure similar sharing).
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**/
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static cairo_status_t
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_cairo_ft_unscaled_font_init (cairo_ft_unscaled_font_t *unscaled,
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cairo_bool_t from_face,
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const char *filename,
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int id,
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FT_Face face)
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{
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_cairo_unscaled_font_init (&unscaled->base,
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&cairo_ft_unscaled_font_backend);
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if (from_face) {
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unscaled->from_face = TRUE;
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_cairo_ft_unscaled_font_init_key (unscaled, TRUE, NULL, 0, face);
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} else {
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char *filename_copy;
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unscaled->from_face = FALSE;
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unscaled->face = NULL;
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filename_copy = strdup (filename);
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if (unlikely (filename_copy == NULL))
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return _cairo_error (CAIRO_STATUS_NO_MEMORY);
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_cairo_ft_unscaled_font_init_key (unscaled, FALSE, filename_copy, id, NULL);
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}
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unscaled->have_scale = FALSE;
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CAIRO_MUTEX_INIT (unscaled->mutex);
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unscaled->lock_count = 0;
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unscaled->faces = NULL;
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return CAIRO_STATUS_SUCCESS;
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}
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/**
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* _cairo_ft_unscaled_font_fini:
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*
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* Free all data associated with a #cairo_ft_unscaled_font_t.
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*
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* CAUTION: The unscaled->face field must be %NULL before calling this
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* function. This is because the #cairo_ft_unscaled_font_t_map keeps a
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* count of these faces (font_map->num_open_faces) so it maintains the
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* unscaled->face field while it has its lock held. See
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* _font_map_release_face_lock_held().
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**/
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static void
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_cairo_ft_unscaled_font_fini (cairo_ft_unscaled_font_t *unscaled)
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{
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assert (unscaled->face == NULL);
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free (unscaled->filename);
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unscaled->filename = NULL;
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CAIRO_MUTEX_FINI (unscaled->mutex);
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}
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|
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static int
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_cairo_ft_unscaled_font_keys_equal (const void *key_a,
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const void *key_b)
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{
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const cairo_ft_unscaled_font_t *unscaled_a = key_a;
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const cairo_ft_unscaled_font_t *unscaled_b = key_b;
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if (unscaled_a->id == unscaled_b->id &&
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unscaled_a->from_face == unscaled_b->from_face)
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{
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if (unscaled_a->from_face)
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return unscaled_a->face == unscaled_b->face;
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if (unscaled_a->filename == NULL && unscaled_b->filename == NULL)
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return TRUE;
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else if (unscaled_a->filename == NULL || unscaled_b->filename == NULL)
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return FALSE;
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else
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return (strcmp (unscaled_a->filename, unscaled_b->filename) == 0);
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}
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return FALSE;
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}
|
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|
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/* Finds or creates a #cairo_ft_unscaled_font_t for the filename/id from
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* pattern. Returns a new reference to the unscaled font.
|
|
*/
|
|
static cairo_status_t
|
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_cairo_ft_unscaled_font_create_internal (cairo_bool_t from_face,
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char *filename,
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int id,
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FT_Face font_face,
|
|
cairo_ft_unscaled_font_t **out)
|
|
{
|
|
cairo_ft_unscaled_font_t key, *unscaled;
|
|
cairo_ft_unscaled_font_map_t *font_map;
|
|
cairo_status_t status;
|
|
|
|
font_map = _cairo_ft_unscaled_font_map_lock ();
|
|
if (unlikely (font_map == NULL))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
_cairo_ft_unscaled_font_init_key (&key, from_face, filename, id, font_face);
|
|
|
|
/* Return existing unscaled font if it exists in the hash table. */
|
|
unscaled = _cairo_hash_table_lookup (font_map->hash_table,
|
|
&key.base.hash_entry);
|
|
if (unscaled != NULL) {
|
|
_cairo_unscaled_font_reference (&unscaled->base);
|
|
goto DONE;
|
|
}
|
|
|
|
/* Otherwise create it and insert into hash table. */
|
|
unscaled = malloc (sizeof (cairo_ft_unscaled_font_t));
|
|
if (unlikely (unscaled == NULL)) {
|
|
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
goto UNWIND_FONT_MAP_LOCK;
|
|
}
|
|
|
|
status = _cairo_ft_unscaled_font_init (unscaled, from_face, filename, id, font_face);
|
|
if (unlikely (status))
|
|
goto UNWIND_UNSCALED_MALLOC;
|
|
|
|
assert (unscaled->base.hash_entry.hash == key.base.hash_entry.hash);
|
|
status = _cairo_hash_table_insert (font_map->hash_table,
|
|
&unscaled->base.hash_entry);
|
|
if (unlikely (status))
|
|
goto UNWIND_UNSCALED_FONT_INIT;
|
|
|
|
DONE:
|
|
_cairo_ft_unscaled_font_map_unlock ();
|
|
*out = unscaled;
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
UNWIND_UNSCALED_FONT_INIT:
|
|
_cairo_ft_unscaled_font_fini (unscaled);
|
|
UNWIND_UNSCALED_MALLOC:
|
|
free (unscaled);
|
|
UNWIND_FONT_MAP_LOCK:
|
|
_cairo_ft_unscaled_font_map_unlock ();
|
|
return status;
|
|
}
|
|
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
static cairo_status_t
|
|
_cairo_ft_unscaled_font_create_for_pattern (FcPattern *pattern,
|
|
cairo_ft_unscaled_font_t **out)
|
|
{
|
|
FT_Face font_face = NULL;
|
|
char *filename = NULL;
|
|
int id = 0;
|
|
FcResult ret;
|
|
|
|
ret = FcPatternGetFTFace (pattern, FC_FT_FACE, 0, &font_face);
|
|
if (ret == FcResultMatch)
|
|
goto DONE;
|
|
if (ret == FcResultOutOfMemory)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
ret = FcPatternGetString (pattern, FC_FILE, 0, (FcChar8 **) &filename);
|
|
if (ret == FcResultOutOfMemory)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
if (ret == FcResultMatch) {
|
|
if (access (filename, R_OK) == 0) {
|
|
/* If FC_INDEX is not set, we just use 0 */
|
|
ret = FcPatternGetInteger (pattern, FC_INDEX, 0, &id);
|
|
if (ret == FcResultOutOfMemory)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
goto DONE;
|
|
} else
|
|
return _cairo_error (CAIRO_STATUS_FILE_NOT_FOUND);
|
|
}
|
|
|
|
/* The pattern contains neither a face nor a filename, resolve it later. */
|
|
*out = NULL;
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
DONE:
|
|
return _cairo_ft_unscaled_font_create_internal (font_face != NULL,
|
|
filename, id, font_face,
|
|
out);
|
|
}
|
|
#endif
|
|
|
|
static cairo_status_t
|
|
_cairo_ft_unscaled_font_create_from_face (FT_Face face,
|
|
cairo_ft_unscaled_font_t **out)
|
|
{
|
|
return _cairo_ft_unscaled_font_create_internal (TRUE, NULL, 0, face, out);
|
|
}
|
|
|
|
static void
|
|
_cairo_ft_unscaled_font_destroy (void *abstract_font)
|
|
{
|
|
cairo_ft_unscaled_font_t *unscaled = abstract_font;
|
|
cairo_ft_unscaled_font_map_t *font_map;
|
|
|
|
if (unscaled == NULL)
|
|
return;
|
|
|
|
font_map = _cairo_ft_unscaled_font_map_lock ();
|
|
/* All created objects must have been mapped in the font map. */
|
|
assert (font_map != NULL);
|
|
|
|
if (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&unscaled->base.ref_count)) {
|
|
/* somebody recreated the font whilst we waited for the lock */
|
|
_cairo_ft_unscaled_font_map_unlock ();
|
|
return;
|
|
}
|
|
|
|
_cairo_hash_table_remove (font_map->hash_table,
|
|
&unscaled->base.hash_entry);
|
|
|
|
if (unscaled->from_face) {
|
|
/* See comments in _ft_font_face_destroy about the "zombie" state
|
|
* for a _ft_font_face.
|
|
*/
|
|
if (unscaled->faces && unscaled->faces->unscaled == NULL) {
|
|
assert (unscaled->faces->next == NULL);
|
|
cairo_font_face_destroy (&unscaled->faces->base);
|
|
}
|
|
} else {
|
|
_font_map_release_face_lock_held (font_map, unscaled);
|
|
}
|
|
unscaled->face = NULL;
|
|
|
|
_cairo_ft_unscaled_font_map_unlock ();
|
|
|
|
_cairo_ft_unscaled_font_fini (unscaled);
|
|
}
|
|
|
|
static cairo_bool_t
|
|
_has_unlocked_face (const void *entry)
|
|
{
|
|
const cairo_ft_unscaled_font_t *unscaled = entry;
|
|
|
|
return (!unscaled->from_face && unscaled->lock_count == 0 && unscaled->face);
|
|
}
|
|
|
|
/* Ensures that an unscaled font has a face object. If we exceed
|
|
* MAX_OPEN_FACES, try to close some.
|
|
*
|
|
* This differs from _cairo_ft_scaled_font_lock_face in that it doesn't
|
|
* set the scale on the face, but just returns it at the last scale.
|
|
*/
|
|
static cairo_warn FT_Face
|
|
_cairo_ft_unscaled_font_lock_face (cairo_ft_unscaled_font_t *unscaled)
|
|
{
|
|
cairo_ft_unscaled_font_map_t *font_map;
|
|
FT_Face face = NULL;
|
|
|
|
CAIRO_MUTEX_LOCK (unscaled->mutex);
|
|
unscaled->lock_count++;
|
|
|
|
if (unscaled->face)
|
|
return unscaled->face;
|
|
|
|
/* If this unscaled font was created from an FT_Face then we just
|
|
* returned it above. */
|
|
assert (!unscaled->from_face);
|
|
|
|
font_map = _cairo_ft_unscaled_font_map_lock ();
|
|
{
|
|
assert (font_map != NULL);
|
|
|
|
while (font_map->num_open_faces >= MAX_OPEN_FACES)
|
|
{
|
|
cairo_ft_unscaled_font_t *entry;
|
|
|
|
entry = _cairo_hash_table_random_entry (font_map->hash_table,
|
|
_has_unlocked_face);
|
|
if (entry == NULL)
|
|
break;
|
|
|
|
_font_map_release_face_lock_held (font_map, entry);
|
|
}
|
|
}
|
|
_cairo_ft_unscaled_font_map_unlock ();
|
|
|
|
if (FT_New_Face (font_map->ft_library,
|
|
unscaled->filename,
|
|
unscaled->id,
|
|
&face) != FT_Err_Ok)
|
|
{
|
|
unscaled->lock_count--;
|
|
CAIRO_MUTEX_UNLOCK (unscaled->mutex);
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
return NULL;
|
|
}
|
|
|
|
unscaled->face = face;
|
|
|
|
font_map->num_open_faces++;
|
|
|
|
return face;
|
|
}
|
|
|
|
|
|
/* Unlock unscaled font locked with _cairo_ft_unscaled_font_lock_face
|
|
*/
|
|
static void
|
|
_cairo_ft_unscaled_font_unlock_face (cairo_ft_unscaled_font_t *unscaled)
|
|
{
|
|
assert (unscaled->lock_count > 0);
|
|
|
|
unscaled->lock_count--;
|
|
|
|
CAIRO_MUTEX_UNLOCK (unscaled->mutex);
|
|
}
|
|
|
|
|
|
static cairo_status_t
|
|
_compute_transform (cairo_ft_font_transform_t *sf,
|
|
cairo_matrix_t *scale,
|
|
cairo_ft_unscaled_font_t *unscaled)
|
|
{
|
|
cairo_status_t status;
|
|
double x_scale, y_scale;
|
|
cairo_matrix_t normalized = *scale;
|
|
|
|
/* The font matrix has x and y "scale" components which we extract and
|
|
* use as character scale values. These influence the way freetype
|
|
* chooses hints, as well as selecting different bitmaps in
|
|
* hand-rendered fonts. We also copy the normalized matrix to
|
|
* freetype's transformation.
|
|
*/
|
|
|
|
status = _cairo_matrix_compute_basis_scale_factors (scale,
|
|
&x_scale, &y_scale,
|
|
1);
|
|
if (unlikely (status))
|
|
return status;
|
|
|
|
/* FreeType docs say this about x_scale and y_scale:
|
|
* "A character width or height smaller than 1pt is set to 1pt;"
|
|
* So, we cap them from below at 1.0 and let the FT transform
|
|
* take care of sub-1.0 scaling. */
|
|
if (x_scale < 1.0)
|
|
x_scale = 1.0;
|
|
if (y_scale < 1.0)
|
|
y_scale = 1.0;
|
|
|
|
if (unscaled && (unscaled->face->face_flags & FT_FACE_FLAG_SCALABLE) == 0) {
|
|
double min_distance = DBL_MAX;
|
|
cairo_bool_t magnify = TRUE;
|
|
int i;
|
|
int best_i = 0;
|
|
double best_x_size = 0;
|
|
double best_y_size = 0;
|
|
|
|
for (i = 0; i < unscaled->face->num_fixed_sizes; i++) {
|
|
double x_size = unscaled->face->available_sizes[i].y_ppem / 64.;
|
|
double y_size = unscaled->face->available_sizes[i].y_ppem / 64.;
|
|
double distance = y_size - y_scale;
|
|
|
|
/*
|
|
* distance is positive if current strike is larger than desired
|
|
* size, and negative if smaller.
|
|
*
|
|
* We like to prefer down-scaling to upscaling.
|
|
*/
|
|
|
|
if ((magnify && distance >= 0) || fabs (distance) <= min_distance) {
|
|
magnify = distance < 0;
|
|
min_distance = fabs (distance);
|
|
best_i = i;
|
|
best_x_size = x_size;
|
|
best_y_size = y_size;
|
|
}
|
|
}
|
|
|
|
x_scale = best_x_size;
|
|
y_scale = best_y_size;
|
|
}
|
|
|
|
sf->x_scale = x_scale;
|
|
sf->y_scale = y_scale;
|
|
|
|
cairo_matrix_scale (&normalized, 1.0 / x_scale, 1.0 / y_scale);
|
|
|
|
_cairo_matrix_get_affine (&normalized,
|
|
&sf->shape[0][0], &sf->shape[0][1],
|
|
&sf->shape[1][0], &sf->shape[1][1],
|
|
NULL, NULL);
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Temporarily scales an unscaled font to the give scale. We catch
|
|
* scaling to the same size, since changing a FT_Face is expensive.
|
|
*/
|
|
static cairo_status_t
|
|
_cairo_ft_unscaled_font_set_scale (cairo_ft_unscaled_font_t *unscaled,
|
|
cairo_matrix_t *scale)
|
|
{
|
|
cairo_status_t status;
|
|
cairo_ft_font_transform_t sf;
|
|
FT_Matrix mat;
|
|
FT_Error error;
|
|
|
|
assert (unscaled->face != NULL);
|
|
|
|
if (unscaled->have_scale &&
|
|
scale->xx == unscaled->current_scale.xx &&
|
|
scale->yx == unscaled->current_scale.yx &&
|
|
scale->xy == unscaled->current_scale.xy &&
|
|
scale->yy == unscaled->current_scale.yy)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
unscaled->have_scale = TRUE;
|
|
unscaled->current_scale = *scale;
|
|
|
|
status = _compute_transform (&sf, scale, unscaled);
|
|
if (unlikely (status))
|
|
return status;
|
|
|
|
unscaled->x_scale = sf.x_scale;
|
|
unscaled->y_scale = sf.y_scale;
|
|
|
|
mat.xx = DOUBLE_TO_16_16(sf.shape[0][0]);
|
|
mat.yx = - DOUBLE_TO_16_16(sf.shape[0][1]);
|
|
mat.xy = - DOUBLE_TO_16_16(sf.shape[1][0]);
|
|
mat.yy = DOUBLE_TO_16_16(sf.shape[1][1]);
|
|
|
|
unscaled->have_shape = (mat.xx != 0x10000 ||
|
|
mat.yx != 0x00000 ||
|
|
mat.xy != 0x00000 ||
|
|
mat.yy != 0x10000);
|
|
|
|
unscaled->Current_Shape = mat;
|
|
cairo_matrix_init (&unscaled->current_shape,
|
|
sf.shape[0][0], sf.shape[0][1],
|
|
sf.shape[1][0], sf.shape[1][1],
|
|
0.0, 0.0);
|
|
|
|
FT_Set_Transform(unscaled->face, &mat, NULL);
|
|
|
|
error = FT_Set_Char_Size (unscaled->face,
|
|
sf.x_scale * 64.0 + .5,
|
|
sf.y_scale * 64.0 + .5,
|
|
0, 0);
|
|
if (error)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* we sometimes need to convert the glyph bitmap in a FT_GlyphSlot
|
|
* into a different format. For example, we want to convert a
|
|
* FT_PIXEL_MODE_LCD or FT_PIXEL_MODE_LCD_V bitmap into a 32-bit
|
|
* ARGB or ABGR bitmap.
|
|
*
|
|
* this function prepares a target descriptor for this operation.
|
|
*
|
|
* input :: target bitmap descriptor. The function will set its
|
|
* 'width', 'rows' and 'pitch' fields, and only these
|
|
*
|
|
* slot :: the glyph slot containing the source bitmap. this
|
|
* function assumes that slot->format == FT_GLYPH_FORMAT_BITMAP
|
|
*
|
|
* mode :: the requested final rendering mode. supported values are
|
|
* MONO, NORMAL (i.e. gray), LCD and LCD_V
|
|
*
|
|
* the function returns the size in bytes of the corresponding buffer,
|
|
* it's up to the caller to allocate the corresponding memory block
|
|
* before calling _fill_xrender_bitmap
|
|
*
|
|
* it also returns -1 in case of error (e.g. incompatible arguments,
|
|
* like trying to convert a gray bitmap into a monochrome one)
|
|
*/
|
|
static int
|
|
_compute_xrender_bitmap_size(FT_Bitmap *target,
|
|
FT_GlyphSlot slot,
|
|
FT_Render_Mode mode)
|
|
{
|
|
FT_Bitmap *ftbit;
|
|
int width, height, pitch;
|
|
|
|
if (slot->format != FT_GLYPH_FORMAT_BITMAP)
|
|
return -1;
|
|
|
|
/* compute the size of the final bitmap */
|
|
ftbit = &slot->bitmap;
|
|
|
|
width = ftbit->width;
|
|
height = ftbit->rows;
|
|
pitch = (width + 3) & ~3;
|
|
|
|
switch (ftbit->pixel_mode) {
|
|
case FT_PIXEL_MODE_MONO:
|
|
if (mode == FT_RENDER_MODE_MONO) {
|
|
pitch = (((width + 31) & ~31) >> 3);
|
|
break;
|
|
}
|
|
/* fall-through */
|
|
|
|
case FT_PIXEL_MODE_GRAY:
|
|
if (mode == FT_RENDER_MODE_LCD ||
|
|
mode == FT_RENDER_MODE_LCD_V)
|
|
{
|
|
/* each pixel is replicated into a 32-bit ARGB value */
|
|
pitch = width * 4;
|
|
}
|
|
break;
|
|
|
|
case FT_PIXEL_MODE_LCD:
|
|
if (mode != FT_RENDER_MODE_LCD)
|
|
return -1;
|
|
|
|
/* horz pixel triplets are packed into 32-bit ARGB values */
|
|
width /= 3;
|
|
pitch = width * 4;
|
|
break;
|
|
|
|
case FT_PIXEL_MODE_LCD_V:
|
|
if (mode != FT_RENDER_MODE_LCD_V)
|
|
return -1;
|
|
|
|
/* vert pixel triplets are packed into 32-bit ARGB values */
|
|
height /= 3;
|
|
pitch = width * 4;
|
|
break;
|
|
|
|
default: /* unsupported source format */
|
|
return -1;
|
|
}
|
|
|
|
target->width = width;
|
|
target->rows = height;
|
|
target->pitch = pitch;
|
|
target->buffer = NULL;
|
|
|
|
return pitch * height;
|
|
}
|
|
|
|
/* this functions converts the glyph bitmap found in a FT_GlyphSlot
|
|
* into a different format (see _compute_xrender_bitmap_size)
|
|
*
|
|
* you should call this function after _compute_xrender_bitmap_size
|
|
*
|
|
* target :: target bitmap descriptor. Note that its 'buffer' pointer
|
|
* must point to memory allocated by the caller
|
|
*
|
|
* slot :: the glyph slot containing the source bitmap
|
|
*
|
|
* mode :: the requested final rendering mode
|
|
*
|
|
* bgr :: boolean, set if BGR or VBGR pixel ordering is needed
|
|
*/
|
|
static void
|
|
_fill_xrender_bitmap(FT_Bitmap *target,
|
|
FT_GlyphSlot slot,
|
|
FT_Render_Mode mode,
|
|
int bgr)
|
|
{
|
|
FT_Bitmap *ftbit = &slot->bitmap;
|
|
unsigned char *srcLine = ftbit->buffer;
|
|
unsigned char *dstLine = target->buffer;
|
|
int src_pitch = ftbit->pitch;
|
|
int width = target->width;
|
|
int height = target->rows;
|
|
int pitch = target->pitch;
|
|
int subpixel;
|
|
int h;
|
|
|
|
subpixel = (mode == FT_RENDER_MODE_LCD ||
|
|
mode == FT_RENDER_MODE_LCD_V);
|
|
|
|
if (src_pitch < 0)
|
|
srcLine -= src_pitch * (ftbit->rows - 1);
|
|
|
|
target->pixel_mode = ftbit->pixel_mode;
|
|
|
|
switch (ftbit->pixel_mode) {
|
|
case FT_PIXEL_MODE_MONO:
|
|
if (subpixel) {
|
|
/* convert mono to ARGB32 values */
|
|
|
|
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
|
|
int x;
|
|
|
|
for (x = 0; x < width; x++) {
|
|
if (srcLine[(x >> 3)] & (0x80 >> (x & 7)))
|
|
((unsigned int *) dstLine)[x] = 0xffffffffU;
|
|
}
|
|
}
|
|
target->pixel_mode = FT_PIXEL_MODE_LCD;
|
|
|
|
} else if (mode == FT_RENDER_MODE_NORMAL) {
|
|
/* convert mono to 8-bit gray */
|
|
|
|
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
|
|
int x;
|
|
|
|
for (x = 0; x < width; x++) {
|
|
if (srcLine[(x >> 3)] & (0x80 >> (x & 7)))
|
|
dstLine[x] = 0xff;
|
|
}
|
|
}
|
|
target->pixel_mode = FT_PIXEL_MODE_GRAY;
|
|
|
|
} else {
|
|
/* copy mono to mono */
|
|
|
|
int bytes = (width + 7) >> 3;
|
|
|
|
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch)
|
|
memcpy (dstLine, srcLine, bytes);
|
|
}
|
|
break;
|
|
|
|
case FT_PIXEL_MODE_GRAY:
|
|
if (subpixel) {
|
|
/* convert gray to ARGB32 values */
|
|
|
|
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
|
|
int x;
|
|
unsigned int *dst = (unsigned int *) dstLine;
|
|
|
|
for (x = 0; x < width; x++) {
|
|
unsigned int pix = srcLine[x];
|
|
|
|
pix |= (pix << 8);
|
|
pix |= (pix << 16);
|
|
|
|
dst[x] = pix;
|
|
}
|
|
}
|
|
target->pixel_mode = FT_PIXEL_MODE_LCD;
|
|
} else {
|
|
/* copy gray into gray */
|
|
|
|
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch)
|
|
memcpy (dstLine, srcLine, width);
|
|
}
|
|
break;
|
|
|
|
case FT_PIXEL_MODE_LCD:
|
|
if (!bgr) {
|
|
/* convert horizontal RGB into ARGB32 */
|
|
|
|
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
|
|
int x;
|
|
unsigned char *src = srcLine;
|
|
unsigned int *dst = (unsigned int *) dstLine;
|
|
|
|
for (x = 0; x < width; x++, src += 3) {
|
|
unsigned int pix;
|
|
|
|
pix = ((unsigned int)src[0] << 16) |
|
|
((unsigned int)src[1] << 8) |
|
|
((unsigned int)src[2] ) |
|
|
((unsigned int)src[1] << 24) ;
|
|
|
|
dst[x] = pix;
|
|
}
|
|
}
|
|
} else {
|
|
/* convert horizontal BGR into ARGB32 */
|
|
|
|
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
|
|
|
|
int x;
|
|
unsigned char *src = srcLine;
|
|
unsigned int *dst = (unsigned int *) dstLine;
|
|
|
|
for (x = 0; x < width; x++, src += 3) {
|
|
unsigned int pix;
|
|
|
|
pix = ((unsigned int)src[2] << 16) |
|
|
((unsigned int)src[1] << 8) |
|
|
((unsigned int)src[0] ) |
|
|
((unsigned int)src[1] << 24) ;
|
|
|
|
dst[x] = pix;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
default: /* FT_PIXEL_MODE_LCD_V */
|
|
/* convert vertical RGB into ARGB32 */
|
|
if (!bgr) {
|
|
|
|
for (h = height; h > 0; h--, srcLine += 3 * src_pitch, dstLine += pitch) {
|
|
int x;
|
|
unsigned char* src = srcLine;
|
|
unsigned int* dst = (unsigned int *) dstLine;
|
|
|
|
for (x = 0; x < width; x++, src += 1) {
|
|
unsigned int pix;
|
|
pix = ((unsigned int)src[0] << 16) |
|
|
((unsigned int)src[src_pitch] << 8) |
|
|
((unsigned int)src[src_pitch*2] ) |
|
|
((unsigned int)src[src_pitch] << 24) ;
|
|
dst[x] = pix;
|
|
}
|
|
}
|
|
} else {
|
|
|
|
for (h = height; h > 0; h--, srcLine += 3*src_pitch, dstLine += pitch) {
|
|
int x;
|
|
unsigned char *src = srcLine;
|
|
unsigned int *dst = (unsigned int *) dstLine;
|
|
|
|
for (x = 0; x < width; x++, src += 1) {
|
|
unsigned int pix;
|
|
|
|
pix = ((unsigned int)src[src_pitch * 2] << 16) |
|
|
((unsigned int)src[src_pitch] << 8) |
|
|
((unsigned int)src[0] ) |
|
|
((unsigned int)src[src_pitch] << 24) ;
|
|
|
|
dst[x] = pix;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Fills in val->image with an image surface created from @bitmap
|
|
*/
|
|
static cairo_status_t
|
|
_get_bitmap_surface (FT_Bitmap *bitmap,
|
|
FT_Library library,
|
|
cairo_bool_t own_buffer,
|
|
cairo_font_options_t *font_options,
|
|
cairo_image_surface_t **surface)
|
|
{
|
|
unsigned int width, height;
|
|
unsigned char *data;
|
|
int format = CAIRO_FORMAT_A8;
|
|
int stride;
|
|
cairo_image_surface_t *image;
|
|
cairo_bool_t component_alpha = FALSE;
|
|
|
|
width = bitmap->width;
|
|
height = bitmap->rows;
|
|
|
|
if (width == 0 || height == 0) {
|
|
*surface = (cairo_image_surface_t *)
|
|
cairo_image_surface_create_for_data (NULL, format, 0, 0, 0);
|
|
return (*surface)->base.status;
|
|
}
|
|
|
|
switch (bitmap->pixel_mode) {
|
|
case FT_PIXEL_MODE_MONO:
|
|
stride = (((width + 31) & ~31) >> 3);
|
|
if (own_buffer) {
|
|
data = bitmap->buffer;
|
|
assert (stride == bitmap->pitch);
|
|
} else {
|
|
data = _cairo_malloc_ab (height, stride);
|
|
if (!data)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
if (stride == bitmap->pitch) {
|
|
memcpy (data, bitmap->buffer, stride * height);
|
|
} else {
|
|
int i;
|
|
unsigned char *source, *dest;
|
|
|
|
source = bitmap->buffer;
|
|
dest = data;
|
|
for (i = height; i; i--) {
|
|
memcpy (dest, source, stride);
|
|
source += bitmap->pitch;
|
|
dest += stride;
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifndef WORDS_BIGENDIAN
|
|
{
|
|
uint8_t *d = data;
|
|
int count = stride * height;
|
|
|
|
while (count--) {
|
|
*d = CAIRO_BITSWAP8 (*d);
|
|
d++;
|
|
}
|
|
}
|
|
#endif
|
|
format = CAIRO_FORMAT_A1;
|
|
break;
|
|
|
|
case FT_PIXEL_MODE_LCD:
|
|
case FT_PIXEL_MODE_LCD_V:
|
|
case FT_PIXEL_MODE_GRAY:
|
|
if (font_options->antialias != CAIRO_ANTIALIAS_SUBPIXEL ||
|
|
bitmap->pixel_mode == FT_PIXEL_MODE_GRAY)
|
|
{
|
|
stride = bitmap->pitch;
|
|
|
|
/* We don't support stride not multiple of 4. */
|
|
if (stride & 3)
|
|
{
|
|
assert (!own_buffer);
|
|
goto convert;
|
|
}
|
|
|
|
if (own_buffer) {
|
|
data = bitmap->buffer;
|
|
} else {
|
|
data = _cairo_malloc_ab (height, stride);
|
|
if (!data)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
memcpy (data, bitmap->buffer, stride * height);
|
|
}
|
|
|
|
format = CAIRO_FORMAT_A8;
|
|
} else {
|
|
data = bitmap->buffer;
|
|
stride = bitmap->pitch;
|
|
format = CAIRO_FORMAT_ARGB32;
|
|
component_alpha = TRUE;
|
|
}
|
|
break;
|
|
#ifdef FT_LOAD_COLOR
|
|
case FT_PIXEL_MODE_BGRA:
|
|
stride = width * 4;
|
|
if (own_buffer) {
|
|
data = bitmap->buffer;
|
|
} else {
|
|
data = _cairo_malloc_ab (height, stride);
|
|
if (!data)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
memcpy (data, bitmap->buffer, stride * height);
|
|
}
|
|
format = CAIRO_FORMAT_ARGB32;
|
|
break;
|
|
#endif
|
|
case FT_PIXEL_MODE_GRAY2:
|
|
case FT_PIXEL_MODE_GRAY4:
|
|
convert:
|
|
if (!own_buffer && library)
|
|
{
|
|
/* This is pretty much the only case that we can get in here. */
|
|
/* Convert to 8bit grayscale. */
|
|
|
|
FT_Bitmap tmp;
|
|
FT_Int align;
|
|
|
|
format = CAIRO_FORMAT_A8;
|
|
|
|
align = cairo_format_stride_for_width (format, bitmap->width);
|
|
|
|
FT_Bitmap_New( &tmp );
|
|
|
|
if (FT_Bitmap_Convert( library, bitmap, &tmp, align ))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
FT_Bitmap_Done( library, bitmap );
|
|
*bitmap = tmp;
|
|
|
|
stride = bitmap->pitch;
|
|
data = _cairo_malloc_ab (height, stride);
|
|
if (!data)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
if (bitmap->num_grays != 256)
|
|
{
|
|
unsigned int x, y;
|
|
unsigned int mul = 255 / (bitmap->num_grays - 1);
|
|
FT_Byte *p = bitmap->buffer;
|
|
for (y = 0; y < height; y++) {
|
|
for (x = 0; x < width; x++)
|
|
p[x] *= mul;
|
|
p += bitmap->pitch;
|
|
}
|
|
}
|
|
|
|
memcpy (data, bitmap->buffer, stride * height);
|
|
break;
|
|
}
|
|
/* These could be triggered by very rare types of TrueType fonts */
|
|
default:
|
|
if (own_buffer)
|
|
free (bitmap->buffer);
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
}
|
|
|
|
/* XXX */
|
|
*surface = image = (cairo_image_surface_t *)
|
|
cairo_image_surface_create_for_data (data,
|
|
format,
|
|
width, height, stride);
|
|
if (image->base.status) {
|
|
free (data);
|
|
return (*surface)->base.status;
|
|
}
|
|
|
|
if (component_alpha)
|
|
pixman_image_set_component_alpha (image->pixman_image, TRUE);
|
|
|
|
_cairo_image_surface_assume_ownership_of_data (image);
|
|
|
|
_cairo_debug_check_image_surface_is_defined (&image->base);
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Converts an outline FT_GlyphSlot into an image
|
|
*
|
|
* This could go through _render_glyph_bitmap as well, letting
|
|
* FreeType convert the outline to a bitmap, but doing it ourselves
|
|
* has two minor advantages: first, we save a copy of the bitmap
|
|
* buffer: we can directly use the buffer that FreeType renders
|
|
* into.
|
|
*
|
|
* Second, it may help when we add support for subpixel
|
|
* rendering: the Xft code does it this way. (Keith thinks that
|
|
* it may also be possible to get the subpixel rendering with
|
|
* FT_Render_Glyph: something worth looking into in more detail
|
|
* when we add subpixel support. If so, we may want to eliminate
|
|
* this version of the code path entirely.
|
|
*/
|
|
static cairo_status_t
|
|
_render_glyph_outline (FT_Face face,
|
|
cairo_font_options_t *font_options,
|
|
cairo_image_surface_t **surface)
|
|
{
|
|
int rgba = FC_RGBA_UNKNOWN;
|
|
int lcd_filter = FT_LCD_FILTER_LEGACY;
|
|
FT_GlyphSlot glyphslot = face->glyph;
|
|
FT_Outline *outline = &glyphslot->outline;
|
|
FT_Bitmap bitmap;
|
|
FT_BBox cbox;
|
|
unsigned int width, height;
|
|
cairo_status_t status;
|
|
FT_Error fterror;
|
|
FT_Library library = glyphslot->library;
|
|
FT_Render_Mode render_mode = FT_RENDER_MODE_NORMAL;
|
|
|
|
switch (font_options->antialias) {
|
|
case CAIRO_ANTIALIAS_NONE:
|
|
render_mode = FT_RENDER_MODE_MONO;
|
|
break;
|
|
|
|
case CAIRO_ANTIALIAS_SUBPIXEL:
|
|
case CAIRO_ANTIALIAS_BEST:
|
|
switch (font_options->subpixel_order) {
|
|
case CAIRO_SUBPIXEL_ORDER_DEFAULT:
|
|
case CAIRO_SUBPIXEL_ORDER_RGB:
|
|
case CAIRO_SUBPIXEL_ORDER_BGR:
|
|
render_mode = FT_RENDER_MODE_LCD;
|
|
break;
|
|
|
|
case CAIRO_SUBPIXEL_ORDER_VRGB:
|
|
case CAIRO_SUBPIXEL_ORDER_VBGR:
|
|
render_mode = FT_RENDER_MODE_LCD_V;
|
|
break;
|
|
}
|
|
|
|
switch (font_options->lcd_filter) {
|
|
case CAIRO_LCD_FILTER_NONE:
|
|
lcd_filter = FT_LCD_FILTER_NONE;
|
|
break;
|
|
case CAIRO_LCD_FILTER_DEFAULT:
|
|
case CAIRO_LCD_FILTER_INTRA_PIXEL:
|
|
lcd_filter = FT_LCD_FILTER_LEGACY;
|
|
break;
|
|
case CAIRO_LCD_FILTER_FIR3:
|
|
lcd_filter = FT_LCD_FILTER_LIGHT;
|
|
break;
|
|
case CAIRO_LCD_FILTER_FIR5:
|
|
lcd_filter = FT_LCD_FILTER_DEFAULT;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case CAIRO_ANTIALIAS_DEFAULT:
|
|
case CAIRO_ANTIALIAS_GRAY:
|
|
case CAIRO_ANTIALIAS_GOOD:
|
|
case CAIRO_ANTIALIAS_FAST:
|
|
render_mode = FT_RENDER_MODE_NORMAL;
|
|
}
|
|
|
|
FT_Outline_Get_CBox (outline, &cbox);
|
|
|
|
cbox.xMin &= -64;
|
|
cbox.yMin &= -64;
|
|
cbox.xMax = (cbox.xMax + 63) & -64;
|
|
cbox.yMax = (cbox.yMax + 63) & -64;
|
|
|
|
width = (unsigned int) ((cbox.xMax - cbox.xMin) >> 6);
|
|
height = (unsigned int) ((cbox.yMax - cbox.yMin) >> 6);
|
|
|
|
if (width * height == 0) {
|
|
cairo_format_t format;
|
|
/* Looks like fb handles zero-sized images just fine */
|
|
switch (render_mode) {
|
|
case FT_RENDER_MODE_MONO:
|
|
format = CAIRO_FORMAT_A1;
|
|
break;
|
|
case FT_RENDER_MODE_LCD:
|
|
case FT_RENDER_MODE_LCD_V:
|
|
format= CAIRO_FORMAT_ARGB32;
|
|
break;
|
|
case FT_RENDER_MODE_LIGHT:
|
|
case FT_RENDER_MODE_NORMAL:
|
|
case FT_RENDER_MODE_MAX:
|
|
default:
|
|
format = CAIRO_FORMAT_A8;
|
|
break;
|
|
}
|
|
|
|
(*surface) = (cairo_image_surface_t *)
|
|
cairo_image_surface_create_for_data (NULL, format, 0, 0, 0);
|
|
if ((*surface)->base.status)
|
|
return (*surface)->base.status;
|
|
} else {
|
|
|
|
int bitmap_size;
|
|
|
|
switch (render_mode) {
|
|
case FT_RENDER_MODE_LCD:
|
|
if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_BGR)
|
|
rgba = FC_RGBA_BGR;
|
|
else
|
|
rgba = FC_RGBA_RGB;
|
|
break;
|
|
|
|
case FT_RENDER_MODE_LCD_V:
|
|
if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_VBGR)
|
|
rgba = FC_RGBA_VBGR;
|
|
else
|
|
rgba = FC_RGBA_VRGB;
|
|
break;
|
|
|
|
case FT_RENDER_MODE_MONO:
|
|
case FT_RENDER_MODE_LIGHT:
|
|
case FT_RENDER_MODE_NORMAL:
|
|
case FT_RENDER_MODE_MAX:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
#if HAVE_FT_LIBRARY_SETLCDFILTER
|
|
FT_Library_SetLcdFilter (library, lcd_filter);
|
|
#endif
|
|
|
|
fterror = FT_Render_Glyph (face->glyph, render_mode);
|
|
|
|
#if HAVE_FT_LIBRARY_SETLCDFILTER
|
|
FT_Library_SetLcdFilter (library, FT_LCD_FILTER_NONE);
|
|
#endif
|
|
|
|
if (fterror != 0)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
bitmap_size = _compute_xrender_bitmap_size (&bitmap,
|
|
face->glyph,
|
|
render_mode);
|
|
if (bitmap_size < 0)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
bitmap.buffer = calloc (1, bitmap_size);
|
|
if (bitmap.buffer == NULL)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
_fill_xrender_bitmap (&bitmap, face->glyph, render_mode,
|
|
(rgba == FC_RGBA_BGR || rgba == FC_RGBA_VBGR));
|
|
|
|
/* Note:
|
|
* _get_bitmap_surface will free bitmap.buffer if there is an error
|
|
*/
|
|
status = _get_bitmap_surface (&bitmap, NULL, TRUE, font_options, surface);
|
|
if (unlikely (status))
|
|
return status;
|
|
|
|
/* Note: the font's coordinate system is upside down from ours, so the
|
|
* Y coordinate of the control box needs to be negated. Moreover, device
|
|
* offsets are position of glyph origin relative to top left while xMin
|
|
* and yMax are offsets of top left relative to origin. Another negation.
|
|
*/
|
|
cairo_surface_set_device_offset (&(*surface)->base,
|
|
(double)-glyphslot->bitmap_left,
|
|
(double)+glyphslot->bitmap_top);
|
|
}
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Converts a bitmap (or other) FT_GlyphSlot into an image */
|
|
static cairo_status_t
|
|
_render_glyph_bitmap (FT_Face face,
|
|
cairo_font_options_t *font_options,
|
|
cairo_image_surface_t **surface)
|
|
{
|
|
FT_GlyphSlot glyphslot = face->glyph;
|
|
cairo_status_t status;
|
|
FT_Error error;
|
|
|
|
/* According to the FreeType docs, glyphslot->format could be
|
|
* something other than FT_GLYPH_FORMAT_OUTLINE or
|
|
* FT_GLYPH_FORMAT_BITMAP. Calling FT_Render_Glyph gives FreeType
|
|
* the opportunity to convert such to
|
|
* bitmap. FT_GLYPH_FORMAT_COMPOSITE will not be encountered since
|
|
* we avoid the FT_LOAD_NO_RECURSE flag.
|
|
*/
|
|
error = FT_Render_Glyph (glyphslot, FT_RENDER_MODE_NORMAL);
|
|
/* XXX ignoring all other errors for now. They are not fatal, typically
|
|
* just a glyph-not-found. */
|
|
if (error == FT_Err_Out_Of_Memory)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
status = _get_bitmap_surface (&glyphslot->bitmap,
|
|
glyphslot->library,
|
|
FALSE, font_options,
|
|
surface);
|
|
if (unlikely (status))
|
|
return status;
|
|
|
|
/*
|
|
* Note: the font's coordinate system is upside down from ours, so the
|
|
* Y coordinate of the control box needs to be negated. Moreover, device
|
|
* offsets are position of glyph origin relative to top left while
|
|
* bitmap_left and bitmap_top are offsets of top left relative to origin.
|
|
* Another negation.
|
|
*/
|
|
cairo_surface_set_device_offset (&(*surface)->base,
|
|
-glyphslot->bitmap_left,
|
|
+glyphslot->bitmap_top);
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
static cairo_status_t
|
|
_transform_glyph_bitmap (cairo_matrix_t * shape,
|
|
cairo_image_surface_t ** surface)
|
|
{
|
|
cairo_matrix_t original_to_transformed;
|
|
cairo_matrix_t transformed_to_original;
|
|
cairo_image_surface_t *old_image;
|
|
cairo_surface_t *image;
|
|
double x[4], y[4];
|
|
double origin_x, origin_y;
|
|
int orig_width, orig_height;
|
|
int i;
|
|
int x_min, y_min, x_max, y_max;
|
|
int width, height;
|
|
cairo_status_t status;
|
|
cairo_surface_pattern_t pattern;
|
|
|
|
/* We want to compute a transform that takes the origin
|
|
* (device_x_offset, device_y_offset) to 0,0, then applies
|
|
* the "shape" portion of the font transform
|
|
*/
|
|
original_to_transformed = *shape;
|
|
|
|
cairo_surface_get_device_offset (&(*surface)->base, &origin_x, &origin_y);
|
|
orig_width = (*surface)->width;
|
|
orig_height = (*surface)->height;
|
|
|
|
cairo_matrix_translate (&original_to_transformed,
|
|
-origin_x, -origin_y);
|
|
|
|
/* Find the bounding box of the original bitmap under that
|
|
* transform
|
|
*/
|
|
x[0] = 0; y[0] = 0;
|
|
x[1] = orig_width; y[1] = 0;
|
|
x[2] = orig_width; y[2] = orig_height;
|
|
x[3] = 0; y[3] = orig_height;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
cairo_matrix_transform_point (&original_to_transformed,
|
|
&x[i], &y[i]);
|
|
|
|
x_min = floor (x[0]); y_min = floor (y[0]);
|
|
x_max = ceil (x[0]); y_max = ceil (y[0]);
|
|
|
|
for (i = 1; i < 4; i++) {
|
|
if (x[i] < x_min)
|
|
x_min = floor (x[i]);
|
|
else if (x[i] > x_max)
|
|
x_max = ceil (x[i]);
|
|
if (y[i] < y_min)
|
|
y_min = floor (y[i]);
|
|
else if (y[i] > y_max)
|
|
y_max = ceil (y[i]);
|
|
}
|
|
|
|
/* Adjust the transform so that the bounding box starts at 0,0 ...
|
|
* this gives our final transform from original bitmap to transformed
|
|
* bitmap.
|
|
*/
|
|
original_to_transformed.x0 -= x_min;
|
|
original_to_transformed.y0 -= y_min;
|
|
|
|
/* Create the transformed bitmap */
|
|
width = x_max - x_min;
|
|
height = y_max - y_min;
|
|
|
|
transformed_to_original = original_to_transformed;
|
|
status = cairo_matrix_invert (&transformed_to_original);
|
|
if (unlikely (status))
|
|
return status;
|
|
|
|
if ((*surface)->format == CAIRO_FORMAT_ARGB32 &&
|
|
!pixman_image_get_component_alpha ((*surface)->pixman_image))
|
|
image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
|
|
else
|
|
image = cairo_image_surface_create (CAIRO_FORMAT_A8, width, height);
|
|
if (unlikely (image->status))
|
|
return image->status;
|
|
|
|
/* Draw the original bitmap transformed into the new bitmap
|
|
*/
|
|
_cairo_pattern_init_for_surface (&pattern, &(*surface)->base);
|
|
cairo_pattern_set_matrix (&pattern.base, &transformed_to_original);
|
|
|
|
status = _cairo_surface_paint (image,
|
|
CAIRO_OPERATOR_SOURCE,
|
|
&pattern.base,
|
|
NULL);
|
|
|
|
_cairo_pattern_fini (&pattern.base);
|
|
|
|
if (unlikely (status)) {
|
|
cairo_surface_destroy (image);
|
|
return status;
|
|
}
|
|
|
|
/* Now update the cache entry for the new bitmap, recomputing
|
|
* the origin based on the final transform.
|
|
*/
|
|
cairo_matrix_transform_point (&original_to_transformed,
|
|
&origin_x, &origin_y);
|
|
|
|
old_image = (*surface);
|
|
(*surface) = (cairo_image_surface_t *)image;
|
|
cairo_surface_destroy (&old_image->base);
|
|
|
|
cairo_surface_set_device_offset (&(*surface)->base,
|
|
_cairo_lround (origin_x),
|
|
_cairo_lround (origin_y));
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
static const cairo_unscaled_font_backend_t cairo_ft_unscaled_font_backend = {
|
|
_cairo_ft_unscaled_font_destroy,
|
|
#if 0
|
|
_cairo_ft_unscaled_font_create_glyph
|
|
#endif
|
|
};
|
|
|
|
/* #cairo_ft_scaled_font_t */
|
|
|
|
typedef struct _cairo_ft_scaled_font {
|
|
cairo_scaled_font_t base;
|
|
cairo_ft_unscaled_font_t *unscaled;
|
|
cairo_ft_options_t ft_options;
|
|
} cairo_ft_scaled_font_t;
|
|
|
|
static const cairo_scaled_font_backend_t _cairo_ft_scaled_font_backend;
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
/* The load flags passed to FT_Load_Glyph control aspects like hinting and
|
|
* antialiasing. Here we compute them from the fields of a FcPattern.
|
|
*/
|
|
static void
|
|
_get_pattern_ft_options (FcPattern *pattern, cairo_ft_options_t *ret)
|
|
{
|
|
FcBool antialias, vertical_layout, hinting, autohint, bitmap, embolden;
|
|
cairo_ft_options_t ft_options;
|
|
int rgba;
|
|
#ifdef FC_HINT_STYLE
|
|
int hintstyle;
|
|
#endif
|
|
|
|
_cairo_font_options_init_default (&ft_options.base);
|
|
ft_options.load_flags = FT_LOAD_DEFAULT;
|
|
ft_options.synth_flags = 0;
|
|
|
|
#ifndef FC_EMBEDDED_BITMAP
|
|
#define FC_EMBEDDED_BITMAP "embeddedbitmap"
|
|
#endif
|
|
|
|
/* Check whether to force use of embedded bitmaps */
|
|
if (FcPatternGetBool (pattern,
|
|
FC_EMBEDDED_BITMAP, 0, &bitmap) != FcResultMatch)
|
|
bitmap = FcFalse;
|
|
|
|
/* disable antialiasing if requested */
|
|
if (FcPatternGetBool (pattern,
|
|
FC_ANTIALIAS, 0, &antialias) != FcResultMatch)
|
|
antialias = FcTrue;
|
|
|
|
if (antialias) {
|
|
cairo_subpixel_order_t subpixel_order;
|
|
int lcd_filter;
|
|
|
|
/* disable hinting if requested */
|
|
if (FcPatternGetBool (pattern,
|
|
FC_HINTING, 0, &hinting) != FcResultMatch)
|
|
hinting = FcTrue;
|
|
|
|
if (FcPatternGetInteger (pattern,
|
|
FC_RGBA, 0, &rgba) != FcResultMatch)
|
|
rgba = FC_RGBA_UNKNOWN;
|
|
|
|
switch (rgba) {
|
|
case FC_RGBA_RGB:
|
|
subpixel_order = CAIRO_SUBPIXEL_ORDER_RGB;
|
|
break;
|
|
case FC_RGBA_BGR:
|
|
subpixel_order = CAIRO_SUBPIXEL_ORDER_BGR;
|
|
break;
|
|
case FC_RGBA_VRGB:
|
|
subpixel_order = CAIRO_SUBPIXEL_ORDER_VRGB;
|
|
break;
|
|
case FC_RGBA_VBGR:
|
|
subpixel_order = CAIRO_SUBPIXEL_ORDER_VBGR;
|
|
break;
|
|
case FC_RGBA_UNKNOWN:
|
|
case FC_RGBA_NONE:
|
|
default:
|
|
subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT;
|
|
break;
|
|
}
|
|
|
|
if (subpixel_order != CAIRO_SUBPIXEL_ORDER_DEFAULT) {
|
|
ft_options.base.subpixel_order = subpixel_order;
|
|
ft_options.base.antialias = CAIRO_ANTIALIAS_SUBPIXEL;
|
|
}
|
|
|
|
if (FcPatternGetInteger (pattern,
|
|
FC_LCD_FILTER, 0, &lcd_filter) == FcResultMatch)
|
|
{
|
|
switch (lcd_filter) {
|
|
case FC_LCD_NONE:
|
|
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_NONE;
|
|
break;
|
|
case FC_LCD_DEFAULT:
|
|
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR5;
|
|
break;
|
|
case FC_LCD_LIGHT:
|
|
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR3;
|
|
break;
|
|
case FC_LCD_LEGACY:
|
|
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_INTRA_PIXEL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef FC_HINT_STYLE
|
|
if (FcPatternGetInteger (pattern,
|
|
FC_HINT_STYLE, 0, &hintstyle) != FcResultMatch)
|
|
hintstyle = FC_HINT_FULL;
|
|
|
|
if (!hinting)
|
|
hintstyle = FC_HINT_NONE;
|
|
|
|
switch (hintstyle) {
|
|
case FC_HINT_NONE:
|
|
ft_options.base.hint_style = CAIRO_HINT_STYLE_NONE;
|
|
break;
|
|
case FC_HINT_SLIGHT:
|
|
ft_options.base.hint_style = CAIRO_HINT_STYLE_SLIGHT;
|
|
break;
|
|
case FC_HINT_MEDIUM:
|
|
default:
|
|
ft_options.base.hint_style = CAIRO_HINT_STYLE_MEDIUM;
|
|
break;
|
|
case FC_HINT_FULL:
|
|
ft_options.base.hint_style = CAIRO_HINT_STYLE_FULL;
|
|
break;
|
|
}
|
|
#else /* !FC_HINT_STYLE */
|
|
if (!hinting) {
|
|
ft_options.base.hint_style = CAIRO_HINT_STYLE_NONE;
|
|
}
|
|
#endif /* FC_HINT_STYLE */
|
|
|
|
/* Force embedded bitmaps off if no hinting requested */
|
|
if (ft_options.base.hint_style == CAIRO_HINT_STYLE_NONE)
|
|
bitmap = FcFalse;
|
|
|
|
if (!bitmap)
|
|
ft_options.load_flags |= FT_LOAD_NO_BITMAP;
|
|
|
|
} else {
|
|
ft_options.base.antialias = CAIRO_ANTIALIAS_NONE;
|
|
}
|
|
|
|
/* force autohinting if requested */
|
|
if (FcPatternGetBool (pattern,
|
|
FC_AUTOHINT, 0, &autohint) != FcResultMatch)
|
|
autohint = FcFalse;
|
|
|
|
if (autohint)
|
|
ft_options.load_flags |= FT_LOAD_FORCE_AUTOHINT;
|
|
|
|
if (FcPatternGetBool (pattern,
|
|
FC_VERTICAL_LAYOUT, 0, &vertical_layout) != FcResultMatch)
|
|
vertical_layout = FcFalse;
|
|
|
|
if (vertical_layout)
|
|
ft_options.load_flags |= FT_LOAD_VERTICAL_LAYOUT;
|
|
|
|
#ifndef FC_EMBOLDEN
|
|
#define FC_EMBOLDEN "embolden"
|
|
#endif
|
|
if (FcPatternGetBool (pattern,
|
|
FC_EMBOLDEN, 0, &embolden) != FcResultMatch)
|
|
embolden = FcFalse;
|
|
|
|
if (embolden)
|
|
ft_options.synth_flags |= CAIRO_FT_SYNTHESIZE_BOLD;
|
|
|
|
*ret = ft_options;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
_cairo_ft_options_merge (cairo_ft_options_t *options,
|
|
cairo_ft_options_t *other)
|
|
{
|
|
int load_flags = other->load_flags;
|
|
int load_target = FT_LOAD_TARGET_NORMAL;
|
|
|
|
/* clear load target mode */
|
|
load_flags &= ~(FT_LOAD_TARGET_(FT_LOAD_TARGET_MODE(other->load_flags)));
|
|
|
|
if (load_flags & FT_LOAD_NO_HINTING)
|
|
other->base.hint_style = CAIRO_HINT_STYLE_NONE;
|
|
|
|
if (other->base.antialias == CAIRO_ANTIALIAS_NONE ||
|
|
options->base.antialias == CAIRO_ANTIALIAS_NONE) {
|
|
options->base.antialias = CAIRO_ANTIALIAS_NONE;
|
|
options->base.subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT;
|
|
}
|
|
|
|
if (other->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL &&
|
|
(options->base.antialias == CAIRO_ANTIALIAS_DEFAULT ||
|
|
options->base.antialias == CAIRO_ANTIALIAS_GRAY)) {
|
|
options->base.antialias = CAIRO_ANTIALIAS_SUBPIXEL;
|
|
options->base.subpixel_order = other->base.subpixel_order;
|
|
}
|
|
|
|
if (options->base.hint_style == CAIRO_HINT_STYLE_DEFAULT)
|
|
options->base.hint_style = other->base.hint_style;
|
|
|
|
if (other->base.hint_style == CAIRO_HINT_STYLE_NONE)
|
|
options->base.hint_style = CAIRO_HINT_STYLE_NONE;
|
|
|
|
if (options->base.lcd_filter == CAIRO_LCD_FILTER_DEFAULT)
|
|
options->base.lcd_filter = other->base.lcd_filter;
|
|
|
|
if (other->base.lcd_filter == CAIRO_LCD_FILTER_NONE)
|
|
options->base.lcd_filter = CAIRO_LCD_FILTER_NONE;
|
|
|
|
if (options->base.antialias == CAIRO_ANTIALIAS_NONE) {
|
|
if (options->base.hint_style == CAIRO_HINT_STYLE_NONE)
|
|
load_flags |= FT_LOAD_NO_HINTING;
|
|
else
|
|
load_target = FT_LOAD_TARGET_MONO;
|
|
load_flags |= FT_LOAD_MONOCHROME;
|
|
} else {
|
|
switch (options->base.hint_style) {
|
|
case CAIRO_HINT_STYLE_NONE:
|
|
load_flags |= FT_LOAD_NO_HINTING;
|
|
break;
|
|
case CAIRO_HINT_STYLE_SLIGHT:
|
|
load_target = FT_LOAD_TARGET_LIGHT;
|
|
break;
|
|
case CAIRO_HINT_STYLE_MEDIUM:
|
|
break;
|
|
case CAIRO_HINT_STYLE_FULL:
|
|
case CAIRO_HINT_STYLE_DEFAULT:
|
|
if (options->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL) {
|
|
switch (options->base.subpixel_order) {
|
|
case CAIRO_SUBPIXEL_ORDER_DEFAULT:
|
|
case CAIRO_SUBPIXEL_ORDER_RGB:
|
|
case CAIRO_SUBPIXEL_ORDER_BGR:
|
|
load_target = FT_LOAD_TARGET_LCD;
|
|
break;
|
|
case CAIRO_SUBPIXEL_ORDER_VRGB:
|
|
case CAIRO_SUBPIXEL_ORDER_VBGR:
|
|
load_target = FT_LOAD_TARGET_LCD_V;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
options->load_flags = load_flags | load_target;
|
|
options->synth_flags = other->synth_flags;
|
|
}
|
|
|
|
static cairo_status_t
|
|
_cairo_ft_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 **font_out)
|
|
{
|
|
cairo_ft_font_face_t *font_face = abstract_font_face;
|
|
cairo_ft_scaled_font_t *scaled_font;
|
|
FT_Face face;
|
|
FT_Size_Metrics *metrics;
|
|
cairo_font_extents_t fs_metrics;
|
|
cairo_status_t status;
|
|
cairo_ft_unscaled_font_t *unscaled;
|
|
|
|
assert (font_face->unscaled);
|
|
|
|
face = _cairo_ft_unscaled_font_lock_face (font_face->unscaled);
|
|
if (unlikely (face == NULL)) /* backend error */
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
scaled_font = malloc (sizeof (cairo_ft_scaled_font_t));
|
|
if (unlikely (scaled_font == NULL)) {
|
|
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
goto FAIL;
|
|
}
|
|
|
|
scaled_font->unscaled = unscaled = font_face->unscaled;
|
|
_cairo_unscaled_font_reference (&unscaled->base);
|
|
|
|
_cairo_font_options_init_copy (&scaled_font->ft_options.base, options);
|
|
_cairo_ft_options_merge (&scaled_font->ft_options, &font_face->ft_options);
|
|
|
|
status = _cairo_scaled_font_init (&scaled_font->base,
|
|
&font_face->base,
|
|
font_matrix, ctm, options,
|
|
&_cairo_ft_scaled_font_backend);
|
|
if (unlikely (status))
|
|
goto CLEANUP_SCALED_FONT;
|
|
|
|
status = _cairo_ft_unscaled_font_set_scale (unscaled,
|
|
&scaled_font->base.scale);
|
|
if (unlikely (status)) {
|
|
/* This can only fail if we encounter an error with the underlying
|
|
* font, so propagate the error back to the font-face. */
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
_cairo_unscaled_font_destroy (&unscaled->base);
|
|
free (scaled_font);
|
|
return status;
|
|
}
|
|
|
|
|
|
metrics = &face->size->metrics;
|
|
|
|
/*
|
|
* Get to unscaled metrics so that the upper level can get back to
|
|
* user space
|
|
*
|
|
* Also use this path for bitmap-only fonts. The other branch uses
|
|
* face members that are only relevant for scalable fonts. This is
|
|
* detected by simply checking for units_per_EM==0.
|
|
*/
|
|
if (scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF ||
|
|
face->units_per_EM == 0) {
|
|
double x_factor, y_factor;
|
|
|
|
if (unscaled->x_scale == 0)
|
|
x_factor = 0;
|
|
else
|
|
x_factor = 1 / unscaled->x_scale;
|
|
|
|
if (unscaled->y_scale == 0)
|
|
y_factor = 0;
|
|
else
|
|
y_factor = 1 / unscaled->y_scale;
|
|
|
|
fs_metrics.ascent = DOUBLE_FROM_26_6(metrics->ascender) * y_factor;
|
|
fs_metrics.descent = DOUBLE_FROM_26_6(- metrics->descender) * y_factor;
|
|
fs_metrics.height = DOUBLE_FROM_26_6(metrics->height) * y_factor;
|
|
if (!_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) {
|
|
fs_metrics.max_x_advance = DOUBLE_FROM_26_6(metrics->max_advance) * x_factor;
|
|
fs_metrics.max_y_advance = 0;
|
|
} else {
|
|
fs_metrics.max_x_advance = 0;
|
|
fs_metrics.max_y_advance = DOUBLE_FROM_26_6(metrics->max_advance) * y_factor;
|
|
}
|
|
} else {
|
|
double scale = face->units_per_EM;
|
|
|
|
fs_metrics.ascent = face->ascender / scale;
|
|
fs_metrics.descent = - face->descender / scale;
|
|
fs_metrics.height = face->height / scale;
|
|
if (!_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) {
|
|
fs_metrics.max_x_advance = face->max_advance_width / scale;
|
|
fs_metrics.max_y_advance = 0;
|
|
} else {
|
|
fs_metrics.max_x_advance = 0;
|
|
fs_metrics.max_y_advance = face->max_advance_height / scale;
|
|
}
|
|
}
|
|
|
|
status = _cairo_scaled_font_set_metrics (&scaled_font->base, &fs_metrics);
|
|
if (unlikely (status))
|
|
goto CLEANUP_SCALED_FONT;
|
|
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
|
|
*font_out = &scaled_font->base;
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
CLEANUP_SCALED_FONT:
|
|
_cairo_unscaled_font_destroy (&unscaled->base);
|
|
free (scaled_font);
|
|
FAIL:
|
|
_cairo_ft_unscaled_font_unlock_face (font_face->unscaled);
|
|
*font_out = _cairo_scaled_font_create_in_error (status);
|
|
return CAIRO_STATUS_SUCCESS; /* non-backend error */
|
|
}
|
|
|
|
cairo_bool_t
|
|
_cairo_scaled_font_is_ft (cairo_scaled_font_t *scaled_font)
|
|
{
|
|
return scaled_font->backend == &_cairo_ft_scaled_font_backend;
|
|
}
|
|
|
|
static void
|
|
_cairo_ft_scaled_font_fini (void *abstract_font)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
|
|
if (scaled_font == NULL)
|
|
return;
|
|
|
|
_cairo_unscaled_font_destroy (&scaled_font->unscaled->base);
|
|
}
|
|
|
|
static int
|
|
_move_to (FT_Vector *to, void *closure)
|
|
{
|
|
cairo_path_fixed_t *path = closure;
|
|
cairo_fixed_t x, y;
|
|
|
|
x = _cairo_fixed_from_26_6 (to->x);
|
|
y = _cairo_fixed_from_26_6 (to->y);
|
|
|
|
if (_cairo_path_fixed_close_path (path) != CAIRO_STATUS_SUCCESS)
|
|
return 1;
|
|
if (_cairo_path_fixed_move_to (path, x, y) != CAIRO_STATUS_SUCCESS)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_line_to (FT_Vector *to, void *closure)
|
|
{
|
|
cairo_path_fixed_t *path = closure;
|
|
cairo_fixed_t x, y;
|
|
|
|
x = _cairo_fixed_from_26_6 (to->x);
|
|
y = _cairo_fixed_from_26_6 (to->y);
|
|
|
|
if (_cairo_path_fixed_line_to (path, x, y) != CAIRO_STATUS_SUCCESS)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_conic_to (FT_Vector *control, FT_Vector *to, void *closure)
|
|
{
|
|
cairo_path_fixed_t *path = closure;
|
|
|
|
cairo_fixed_t x0, y0;
|
|
cairo_fixed_t x1, y1;
|
|
cairo_fixed_t x2, y2;
|
|
cairo_fixed_t x3, y3;
|
|
cairo_point_t conic;
|
|
|
|
if (! _cairo_path_fixed_get_current_point (path, &x0, &y0))
|
|
return 1;
|
|
|
|
conic.x = _cairo_fixed_from_26_6 (control->x);
|
|
conic.y = _cairo_fixed_from_26_6 (control->y);
|
|
|
|
x3 = _cairo_fixed_from_26_6 (to->x);
|
|
y3 = _cairo_fixed_from_26_6 (to->y);
|
|
|
|
x1 = x0 + 2.0/3.0 * (conic.x - x0);
|
|
y1 = y0 + 2.0/3.0 * (conic.y - y0);
|
|
|
|
x2 = x3 + 2.0/3.0 * (conic.x - x3);
|
|
y2 = y3 + 2.0/3.0 * (conic.y - y3);
|
|
|
|
if (_cairo_path_fixed_curve_to (path,
|
|
x1, y1,
|
|
x2, y2,
|
|
x3, y3) != CAIRO_STATUS_SUCCESS)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_cubic_to (FT_Vector *control1, FT_Vector *control2,
|
|
FT_Vector *to, void *closure)
|
|
{
|
|
cairo_path_fixed_t *path = closure;
|
|
cairo_fixed_t x0, y0;
|
|
cairo_fixed_t x1, y1;
|
|
cairo_fixed_t x2, y2;
|
|
|
|
x0 = _cairo_fixed_from_26_6 (control1->x);
|
|
y0 = _cairo_fixed_from_26_6 (control1->y);
|
|
|
|
x1 = _cairo_fixed_from_26_6 (control2->x);
|
|
y1 = _cairo_fixed_from_26_6 (control2->y);
|
|
|
|
x2 = _cairo_fixed_from_26_6 (to->x);
|
|
y2 = _cairo_fixed_from_26_6 (to->y);
|
|
|
|
if (_cairo_path_fixed_curve_to (path,
|
|
x0, y0,
|
|
x1, y1,
|
|
x2, y2) != CAIRO_STATUS_SUCCESS)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static cairo_status_t
|
|
_decompose_glyph_outline (FT_Face face,
|
|
cairo_font_options_t *options,
|
|
cairo_path_fixed_t **pathp)
|
|
{
|
|
static const FT_Outline_Funcs outline_funcs = {
|
|
(FT_Outline_MoveToFunc)_move_to,
|
|
(FT_Outline_LineToFunc)_line_to,
|
|
(FT_Outline_ConicToFunc)_conic_to,
|
|
(FT_Outline_CubicToFunc)_cubic_to,
|
|
0, /* shift */
|
|
0, /* delta */
|
|
};
|
|
static const FT_Matrix invert_y = {
|
|
DOUBLE_TO_16_16 (1.0), 0,
|
|
0, DOUBLE_TO_16_16 (-1.0),
|
|
};
|
|
|
|
FT_GlyphSlot glyph;
|
|
cairo_path_fixed_t *path;
|
|
cairo_status_t status;
|
|
|
|
path = _cairo_path_fixed_create ();
|
|
if (!path)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
glyph = face->glyph;
|
|
|
|
/* Font glyphs have an inverted Y axis compared to cairo. */
|
|
FT_Outline_Transform (&glyph->outline, &invert_y);
|
|
if (FT_Outline_Decompose (&glyph->outline, &outline_funcs, path)) {
|
|
_cairo_path_fixed_destroy (path);
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
}
|
|
|
|
status = _cairo_path_fixed_close_path (path);
|
|
if (unlikely (status)) {
|
|
_cairo_path_fixed_destroy (path);
|
|
return status;
|
|
}
|
|
|
|
*pathp = path;
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Translate glyph to match its metrics.
|
|
*/
|
|
static void
|
|
_cairo_ft_scaled_glyph_vertical_layout_bearing_fix (void *abstract_font,
|
|
FT_GlyphSlot glyph)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
FT_Vector vector;
|
|
|
|
vector.x = glyph->metrics.vertBearingX - glyph->metrics.horiBearingX;
|
|
vector.y = -glyph->metrics.vertBearingY - glyph->metrics.horiBearingY;
|
|
|
|
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE) {
|
|
FT_Vector_Transform (&vector, &scaled_font->unscaled->Current_Shape);
|
|
FT_Outline_Translate(&glyph->outline, vector.x, vector.y);
|
|
} else if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
|
|
glyph->bitmap_left += vector.x / 64;
|
|
glyph->bitmap_top += vector.y / 64;
|
|
}
|
|
}
|
|
|
|
static cairo_int_status_t
|
|
_cairo_ft_scaled_glyph_init (void *abstract_font,
|
|
cairo_scaled_glyph_t *scaled_glyph,
|
|
cairo_scaled_glyph_info_t info)
|
|
{
|
|
cairo_text_extents_t fs_metrics;
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
|
|
FT_GlyphSlot glyph;
|
|
FT_Face face;
|
|
FT_Error error;
|
|
int load_flags = scaled_font->ft_options.load_flags;
|
|
FT_Glyph_Metrics *metrics;
|
|
double x_factor, y_factor;
|
|
cairo_bool_t vertical_layout = FALSE;
|
|
cairo_status_t status;
|
|
|
|
face = _cairo_ft_unscaled_font_lock_face (unscaled);
|
|
if (!face)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled,
|
|
&scaled_font->base.scale);
|
|
if (unlikely (status))
|
|
goto FAIL;
|
|
|
|
/* Ignore global advance unconditionally */
|
|
load_flags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH;
|
|
|
|
if ((info & CAIRO_SCALED_GLYPH_INFO_PATH) != 0 &&
|
|
(info & CAIRO_SCALED_GLYPH_INFO_SURFACE) == 0)
|
|
load_flags |= FT_LOAD_NO_BITMAP;
|
|
|
|
/*
|
|
* Don't pass FT_LOAD_VERTICAL_LAYOUT to FT_Load_Glyph here as
|
|
* suggested by freetype people.
|
|
*/
|
|
if (load_flags & FT_LOAD_VERTICAL_LAYOUT) {
|
|
load_flags &= ~FT_LOAD_VERTICAL_LAYOUT;
|
|
vertical_layout = TRUE;
|
|
}
|
|
|
|
#ifdef FT_LOAD_COLOR
|
|
/* Color-glyph support:
|
|
*
|
|
* This flags needs plumbing through fontconfig (does it?), and
|
|
* maybe we should cache color and grayscale bitmaps separately
|
|
* such that users of the font (ie. the surface) can choose which
|
|
* version to use based on target content type.
|
|
*
|
|
* Moreover, none of our backends and compositors currently support
|
|
* color glyphs. As such, this is currently disabled.
|
|
*/
|
|
/* load_flags |= FT_LOAD_COLOR; */
|
|
#endif
|
|
|
|
error = FT_Load_Glyph (face,
|
|
_cairo_scaled_glyph_index(scaled_glyph),
|
|
load_flags);
|
|
/* XXX ignoring all other errors for now. They are not fatal, typically
|
|
* just a glyph-not-found. */
|
|
if (error == FT_Err_Out_Of_Memory) {
|
|
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
goto FAIL;
|
|
}
|
|
|
|
glyph = face->glyph;
|
|
|
|
/*
|
|
* synthesize glyphs if requested
|
|
*/
|
|
#if HAVE_FT_GLYPHSLOT_EMBOLDEN
|
|
if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_BOLD)
|
|
FT_GlyphSlot_Embolden (glyph);
|
|
#endif
|
|
|
|
#if HAVE_FT_GLYPHSLOT_OBLIQUE
|
|
if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_OBLIQUE)
|
|
FT_GlyphSlot_Oblique (glyph);
|
|
#endif
|
|
|
|
if (vertical_layout)
|
|
_cairo_ft_scaled_glyph_vertical_layout_bearing_fix (scaled_font, glyph);
|
|
|
|
if (info & CAIRO_SCALED_GLYPH_INFO_METRICS) {
|
|
|
|
cairo_bool_t hint_metrics = scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF;
|
|
/*
|
|
* Compute font-space metrics
|
|
*/
|
|
metrics = &glyph->metrics;
|
|
|
|
if (unscaled->x_scale == 0)
|
|
x_factor = 0;
|
|
else
|
|
x_factor = 1 / unscaled->x_scale;
|
|
|
|
if (unscaled->y_scale == 0)
|
|
y_factor = 0;
|
|
else
|
|
y_factor = 1 / unscaled->y_scale;
|
|
|
|
/*
|
|
* Note: Y coordinates of the horizontal bearing need to be negated.
|
|
*
|
|
* Scale metrics back to glyph space from the scaled glyph space returned
|
|
* by FreeType
|
|
*
|
|
* If we want hinted metrics but aren't asking for hinted glyphs from
|
|
* FreeType, then we need to do the metric hinting ourselves.
|
|
*/
|
|
|
|
if (hint_metrics && (load_flags & FT_LOAD_NO_HINTING))
|
|
{
|
|
FT_Pos x1, x2;
|
|
FT_Pos y1, y2;
|
|
FT_Pos advance;
|
|
|
|
if (!vertical_layout) {
|
|
x1 = (metrics->horiBearingX) & -64;
|
|
x2 = (metrics->horiBearingX + metrics->width + 63) & -64;
|
|
y1 = (-metrics->horiBearingY) & -64;
|
|
y2 = (-metrics->horiBearingY + metrics->height + 63) & -64;
|
|
|
|
advance = ((metrics->horiAdvance + 32) & -64);
|
|
|
|
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (x1) * x_factor;
|
|
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (y1) * y_factor;
|
|
|
|
fs_metrics.width = DOUBLE_FROM_26_6 (x2 - x1) * x_factor;
|
|
fs_metrics.height = DOUBLE_FROM_26_6 (y2 - y1) * y_factor;
|
|
|
|
fs_metrics.x_advance = DOUBLE_FROM_26_6 (advance) * x_factor;
|
|
fs_metrics.y_advance = 0;
|
|
} else {
|
|
x1 = (metrics->vertBearingX) & -64;
|
|
x2 = (metrics->vertBearingX + metrics->width + 63) & -64;
|
|
y1 = (metrics->vertBearingY) & -64;
|
|
y2 = (metrics->vertBearingY + metrics->height + 63) & -64;
|
|
|
|
advance = ((metrics->vertAdvance + 32) & -64);
|
|
|
|
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (x1) * x_factor;
|
|
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (y1) * y_factor;
|
|
|
|
fs_metrics.width = DOUBLE_FROM_26_6 (x2 - x1) * x_factor;
|
|
fs_metrics.height = DOUBLE_FROM_26_6 (y2 - y1) * y_factor;
|
|
|
|
fs_metrics.x_advance = 0;
|
|
fs_metrics.y_advance = DOUBLE_FROM_26_6 (advance) * y_factor;
|
|
}
|
|
} else {
|
|
fs_metrics.width = DOUBLE_FROM_26_6 (metrics->width) * x_factor;
|
|
fs_metrics.height = DOUBLE_FROM_26_6 (metrics->height) * y_factor;
|
|
|
|
if (!vertical_layout) {
|
|
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (metrics->horiBearingX) * x_factor;
|
|
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (-metrics->horiBearingY) * y_factor;
|
|
|
|
if (hint_metrics || glyph->format != FT_GLYPH_FORMAT_OUTLINE)
|
|
fs_metrics.x_advance = DOUBLE_FROM_26_6 (metrics->horiAdvance) * x_factor;
|
|
else
|
|
fs_metrics.x_advance = DOUBLE_FROM_16_16 (glyph->linearHoriAdvance) * x_factor;
|
|
fs_metrics.y_advance = 0 * y_factor;
|
|
} else {
|
|
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (metrics->vertBearingX) * x_factor;
|
|
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (metrics->vertBearingY) * y_factor;
|
|
|
|
fs_metrics.x_advance = 0 * x_factor;
|
|
if (hint_metrics || glyph->format != FT_GLYPH_FORMAT_OUTLINE)
|
|
fs_metrics.y_advance = DOUBLE_FROM_26_6 (metrics->vertAdvance) * y_factor;
|
|
else
|
|
fs_metrics.y_advance = DOUBLE_FROM_16_16 (glyph->linearVertAdvance) * y_factor;
|
|
}
|
|
}
|
|
|
|
_cairo_scaled_glyph_set_metrics (scaled_glyph,
|
|
&scaled_font->base,
|
|
&fs_metrics);
|
|
}
|
|
|
|
if ((info & CAIRO_SCALED_GLYPH_INFO_SURFACE) != 0) {
|
|
cairo_image_surface_t *surface;
|
|
|
|
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE) {
|
|
status = _render_glyph_outline (face, &scaled_font->ft_options.base,
|
|
&surface);
|
|
} else {
|
|
status = _render_glyph_bitmap (face, &scaled_font->ft_options.base,
|
|
&surface);
|
|
if (likely (status == CAIRO_STATUS_SUCCESS) &&
|
|
unscaled->have_shape)
|
|
{
|
|
status = _transform_glyph_bitmap (&unscaled->current_shape,
|
|
&surface);
|
|
if (unlikely (status))
|
|
cairo_surface_destroy (&surface->base);
|
|
}
|
|
}
|
|
if (unlikely (status))
|
|
goto FAIL;
|
|
|
|
_cairo_scaled_glyph_set_surface (scaled_glyph,
|
|
&scaled_font->base,
|
|
surface);
|
|
}
|
|
|
|
if (info & CAIRO_SCALED_GLYPH_INFO_PATH) {
|
|
cairo_path_fixed_t *path = NULL; /* hide compiler warning */
|
|
|
|
/*
|
|
* A kludge -- the above code will trash the outline,
|
|
* so reload it. This will probably never occur though
|
|
*/
|
|
if ((info & CAIRO_SCALED_GLYPH_INFO_SURFACE) != 0) {
|
|
error = FT_Load_Glyph (face,
|
|
_cairo_scaled_glyph_index(scaled_glyph),
|
|
load_flags | FT_LOAD_NO_BITMAP);
|
|
/* XXX ignoring all other errors for now. They are not fatal, typically
|
|
* just a glyph-not-found. */
|
|
if (error == FT_Err_Out_Of_Memory) {
|
|
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
goto FAIL;
|
|
}
|
|
#if HAVE_FT_GLYPHSLOT_EMBOLDEN
|
|
if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_BOLD)
|
|
FT_GlyphSlot_Embolden (glyph);
|
|
#endif
|
|
#if HAVE_FT_GLYPHSLOT_OBLIQUE
|
|
if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_OBLIQUE)
|
|
FT_GlyphSlot_Oblique (glyph);
|
|
#endif
|
|
if (vertical_layout)
|
|
_cairo_ft_scaled_glyph_vertical_layout_bearing_fix (scaled_font, glyph);
|
|
|
|
}
|
|
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE)
|
|
status = _decompose_glyph_outline (face, &scaled_font->ft_options.base,
|
|
&path);
|
|
else
|
|
status = CAIRO_INT_STATUS_UNSUPPORTED;
|
|
|
|
if (unlikely (status))
|
|
goto FAIL;
|
|
|
|
_cairo_scaled_glyph_set_path (scaled_glyph,
|
|
&scaled_font->base,
|
|
path);
|
|
}
|
|
FAIL:
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
|
|
return status;
|
|
}
|
|
|
|
static unsigned long
|
|
_cairo_ft_ucs4_to_index (void *abstract_font,
|
|
uint32_t ucs4)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
|
|
FT_Face face;
|
|
FT_UInt index;
|
|
|
|
face = _cairo_ft_unscaled_font_lock_face (unscaled);
|
|
if (!face)
|
|
return 0;
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
index = FcFreeTypeCharIndex (face, ucs4);
|
|
#else
|
|
index = FT_Get_Char_Index (face, ucs4);
|
|
#endif
|
|
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
return index;
|
|
}
|
|
|
|
static cairo_int_status_t
|
|
_cairo_ft_load_truetype_table (void *abstract_font,
|
|
unsigned long tag,
|
|
long offset,
|
|
unsigned char *buffer,
|
|
unsigned long *length)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
|
|
FT_Face face;
|
|
cairo_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
|
|
|
|
/* We don't support the FreeType feature of loading a table
|
|
* without specifying the size since this may overflow our
|
|
* buffer. */
|
|
assert (length != NULL);
|
|
|
|
if (_cairo_ft_scaled_font_is_vertical (&scaled_font->base))
|
|
return CAIRO_INT_STATUS_UNSUPPORTED;
|
|
|
|
#if HAVE_FT_LOAD_SFNT_TABLE
|
|
face = _cairo_ft_unscaled_font_lock_face (unscaled);
|
|
if (!face)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
if (FT_IS_SFNT (face)) {
|
|
if (buffer == NULL)
|
|
*length = 0;
|
|
|
|
if (FT_Load_Sfnt_Table (face, tag, offset, buffer, length) == 0)
|
|
status = CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
#endif
|
|
|
|
return status;
|
|
}
|
|
|
|
static cairo_int_status_t
|
|
_cairo_ft_index_to_ucs4(void *abstract_font,
|
|
unsigned long index,
|
|
uint32_t *ucs4)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
|
|
FT_Face face;
|
|
FT_ULong charcode;
|
|
FT_UInt gindex;
|
|
|
|
face = _cairo_ft_unscaled_font_lock_face (unscaled);
|
|
if (!face)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
*ucs4 = (uint32_t) -1;
|
|
charcode = FT_Get_First_Char(face, &gindex);
|
|
while (gindex != 0) {
|
|
if (gindex == index) {
|
|
*ucs4 = charcode;
|
|
break;
|
|
}
|
|
charcode = FT_Get_Next_Char (face, charcode, &gindex);
|
|
}
|
|
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
static cairo_bool_t
|
|
_cairo_ft_is_synthetic (void *abstract_font)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
return scaled_font->ft_options.synth_flags != 0;
|
|
}
|
|
|
|
static cairo_int_status_t
|
|
_cairo_index_to_glyph_name (void *abstract_font,
|
|
char **glyph_names,
|
|
int num_glyph_names,
|
|
unsigned long glyph_index,
|
|
unsigned long *glyph_array_index)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
|
|
FT_Face face;
|
|
char buffer[256]; /* PLRM spcifies max name length of 127 */
|
|
FT_Error error;
|
|
int i;
|
|
|
|
face = _cairo_ft_unscaled_font_lock_face (unscaled);
|
|
if (!face)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
error = FT_Get_Glyph_Name (face, glyph_index, buffer, sizeof buffer);
|
|
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
|
|
if (error != FT_Err_Ok) {
|
|
/* propagate fatal errors from FreeType */
|
|
if (error == FT_Err_Out_Of_Memory)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
return CAIRO_INT_STATUS_UNSUPPORTED;
|
|
}
|
|
|
|
/* FT first numbers the glyphs in the order they are read from the
|
|
* Type 1 font. Then if .notdef is not the first glyph, the first
|
|
* glyph is swapped with .notdef to ensure that .notdef is at
|
|
* glyph index 0.
|
|
*
|
|
* As all but two glyphs in glyph_names already have the same
|
|
* index as the FT glyph index, we first check if
|
|
* glyph_names[glyph_index] is the name we are looking for. If not
|
|
* we fall back to searching the entire array.
|
|
*/
|
|
|
|
if ((long)glyph_index < num_glyph_names &&
|
|
strcmp (glyph_names[glyph_index], buffer) == 0)
|
|
{
|
|
*glyph_array_index = glyph_index;
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
for (i = 0; i < num_glyph_names; i++) {
|
|
if (strcmp (glyph_names[i], buffer) == 0) {
|
|
*glyph_array_index = i;
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
}
|
|
|
|
return CAIRO_INT_STATUS_UNSUPPORTED;
|
|
}
|
|
|
|
static cairo_bool_t
|
|
_ft_is_type1 (FT_Face face)
|
|
{
|
|
#if HAVE_FT_GET_X11_FONT_FORMAT
|
|
const char *font_format = FT_Get_X11_Font_Format (face);
|
|
if (font_format &&
|
|
(strcmp (font_format, "Type 1") == 0 ||
|
|
strcmp (font_format, "CFF") == 0))
|
|
{
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static cairo_int_status_t
|
|
_cairo_ft_load_type1_data (void *abstract_font,
|
|
long offset,
|
|
unsigned char *buffer,
|
|
unsigned long *length)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = abstract_font;
|
|
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
|
|
FT_Face face;
|
|
cairo_status_t status = CAIRO_STATUS_SUCCESS;
|
|
unsigned long available_length;
|
|
unsigned long ret;
|
|
|
|
assert (length != NULL);
|
|
|
|
if (_cairo_ft_scaled_font_is_vertical (&scaled_font->base))
|
|
return CAIRO_INT_STATUS_UNSUPPORTED;
|
|
|
|
face = _cairo_ft_unscaled_font_lock_face (unscaled);
|
|
if (!face)
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
#if HAVE_FT_LOAD_SFNT_TABLE
|
|
if (FT_IS_SFNT (face)) {
|
|
status = CAIRO_INT_STATUS_UNSUPPORTED;
|
|
goto unlock;
|
|
}
|
|
#endif
|
|
|
|
if (! _ft_is_type1 (face)) {
|
|
status = CAIRO_INT_STATUS_UNSUPPORTED;
|
|
goto unlock;
|
|
}
|
|
|
|
available_length = MAX (face->stream->size - offset, 0);
|
|
if (!buffer) {
|
|
*length = available_length;
|
|
} else {
|
|
if (*length > available_length) {
|
|
status = CAIRO_INT_STATUS_UNSUPPORTED;
|
|
} else if (face->stream->read != NULL) {
|
|
/* Note that read() may be implemented as a macro, thanks POSIX!, so we
|
|
* need to wrap the following usage in parentheses in order to
|
|
* disambiguate it for the pre-processor - using the verbose function
|
|
* pointer dereference for clarity.
|
|
*/
|
|
ret = (* face->stream->read) (face->stream,
|
|
offset,
|
|
buffer,
|
|
*length);
|
|
if (ret != *length)
|
|
status = _cairo_error (CAIRO_STATUS_READ_ERROR);
|
|
} else {
|
|
memcpy (buffer, face->stream->base + offset, *length);
|
|
}
|
|
}
|
|
|
|
unlock:
|
|
_cairo_ft_unscaled_font_unlock_face (unscaled);
|
|
|
|
return status;
|
|
}
|
|
|
|
static const cairo_scaled_font_backend_t _cairo_ft_scaled_font_backend = {
|
|
CAIRO_FONT_TYPE_FT,
|
|
_cairo_ft_scaled_font_fini,
|
|
_cairo_ft_scaled_glyph_init,
|
|
NULL, /* text_to_glyphs */
|
|
_cairo_ft_ucs4_to_index,
|
|
_cairo_ft_load_truetype_table,
|
|
_cairo_ft_index_to_ucs4,
|
|
_cairo_ft_is_synthetic,
|
|
_cairo_index_to_glyph_name,
|
|
_cairo_ft_load_type1_data
|
|
};
|
|
|
|
/* #cairo_ft_font_face_t */
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
static cairo_font_face_t *
|
|
_cairo_ft_font_face_create_for_pattern (FcPattern *pattern);
|
|
|
|
static cairo_status_t
|
|
_cairo_ft_font_face_create_for_toy (cairo_toy_font_face_t *toy_face,
|
|
cairo_font_face_t **font_face_out)
|
|
{
|
|
cairo_font_face_t *font_face = (cairo_font_face_t *) &_cairo_font_face_nil;
|
|
FcPattern *pattern;
|
|
int fcslant;
|
|
int fcweight;
|
|
|
|
pattern = FcPatternCreate ();
|
|
if (!pattern) {
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
return font_face->status;
|
|
}
|
|
|
|
if (!FcPatternAddString (pattern,
|
|
FC_FAMILY, (unsigned char *) toy_face->family))
|
|
{
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
switch (toy_face->slant)
|
|
{
|
|
case CAIRO_FONT_SLANT_ITALIC:
|
|
fcslant = FC_SLANT_ITALIC;
|
|
break;
|
|
case CAIRO_FONT_SLANT_OBLIQUE:
|
|
fcslant = FC_SLANT_OBLIQUE;
|
|
break;
|
|
case CAIRO_FONT_SLANT_NORMAL:
|
|
default:
|
|
fcslant = FC_SLANT_ROMAN;
|
|
break;
|
|
}
|
|
|
|
if (!FcPatternAddInteger (pattern, FC_SLANT, fcslant)) {
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
switch (toy_face->weight)
|
|
{
|
|
case CAIRO_FONT_WEIGHT_BOLD:
|
|
fcweight = FC_WEIGHT_BOLD;
|
|
break;
|
|
case CAIRO_FONT_WEIGHT_NORMAL:
|
|
default:
|
|
fcweight = FC_WEIGHT_MEDIUM;
|
|
break;
|
|
}
|
|
|
|
if (!FcPatternAddInteger (pattern, FC_WEIGHT, fcweight)) {
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
font_face = _cairo_ft_font_face_create_for_pattern (pattern);
|
|
|
|
FREE_PATTERN:
|
|
FcPatternDestroy (pattern);
|
|
|
|
*font_face_out = font_face;
|
|
return font_face->status;
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
_cairo_ft_font_face_destroy (void *abstract_face)
|
|
{
|
|
cairo_ft_font_face_t *font_face = abstract_face;
|
|
|
|
/* When destroying a face created by cairo_ft_font_face_create_for_ft_face,
|
|
* we have a special "zombie" state for the face when the unscaled font
|
|
* is still alive but there are no other references to a font face with
|
|
* the same FT_Face.
|
|
*
|
|
* We go from:
|
|
*
|
|
* font_face ------> unscaled
|
|
* <-....weak....../
|
|
*
|
|
* To:
|
|
*
|
|
* font_face <------- unscaled
|
|
*/
|
|
|
|
if (font_face->unscaled &&
|
|
font_face->unscaled->from_face &&
|
|
font_face->next == NULL &&
|
|
font_face->unscaled->faces == font_face &&
|
|
CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->unscaled->base.ref_count) > 1)
|
|
{
|
|
cairo_font_face_reference (&font_face->base);
|
|
|
|
_cairo_unscaled_font_destroy (&font_face->unscaled->base);
|
|
font_face->unscaled = NULL;
|
|
|
|
return;
|
|
}
|
|
|
|
if (font_face->unscaled) {
|
|
cairo_ft_font_face_t *tmp_face = NULL;
|
|
cairo_ft_font_face_t *last_face = NULL;
|
|
|
|
/* Remove face from linked list */
|
|
for (tmp_face = font_face->unscaled->faces;
|
|
tmp_face;
|
|
tmp_face = tmp_face->next)
|
|
{
|
|
if (tmp_face == font_face) {
|
|
if (last_face)
|
|
last_face->next = tmp_face->next;
|
|
else
|
|
font_face->unscaled->faces = tmp_face->next;
|
|
}
|
|
|
|
last_face = tmp_face;
|
|
}
|
|
|
|
_cairo_unscaled_font_destroy (&font_face->unscaled->base);
|
|
font_face->unscaled = NULL;
|
|
}
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
if (font_face->pattern) {
|
|
FcPatternDestroy (font_face->pattern);
|
|
cairo_font_face_destroy (font_face->resolved_font_face);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static cairo_font_face_t *
|
|
_cairo_ft_font_face_get_implementation (void *abstract_face,
|
|
const cairo_matrix_t *font_matrix,
|
|
const cairo_matrix_t *ctm,
|
|
const cairo_font_options_t *options)
|
|
{
|
|
cairo_ft_font_face_t *font_face = abstract_face;
|
|
|
|
/* The handling of font options is different depending on how the
|
|
* font face was created. When the user creates a font face with
|
|
* cairo_ft_font_face_create_for_ft_face(), then the load flags
|
|
* passed in augment the load flags for the options. But for
|
|
* cairo_ft_font_face_create_for_pattern(), the load flags are
|
|
* derived from a pattern where the user has called
|
|
* cairo_ft_font_options_substitute(), so *just* use those load
|
|
* flags and ignore the options.
|
|
*/
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
/* If we have an unresolved pattern, resolve it and create
|
|
* unscaled font. Otherwise, use the ones stored in font_face.
|
|
*/
|
|
if (font_face->pattern) {
|
|
cairo_font_face_t *resolved;
|
|
|
|
/* Cache the resolved font whilst the FcConfig remains consistent. */
|
|
resolved = font_face->resolved_font_face;
|
|
if (resolved != NULL) {
|
|
if (! FcInitBringUptoDate ()) {
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
return (cairo_font_face_t *) &_cairo_font_face_nil;
|
|
}
|
|
|
|
if (font_face->resolved_config == FcConfigGetCurrent ())
|
|
return cairo_font_face_reference (resolved);
|
|
|
|
cairo_font_face_destroy (resolved);
|
|
font_face->resolved_font_face = NULL;
|
|
}
|
|
|
|
resolved = _cairo_ft_resolve_pattern (font_face->pattern,
|
|
font_matrix,
|
|
ctm,
|
|
options);
|
|
if (unlikely (resolved->status))
|
|
return resolved;
|
|
|
|
font_face->resolved_font_face = cairo_font_face_reference (resolved);
|
|
font_face->resolved_config = FcConfigGetCurrent ();
|
|
|
|
return resolved;
|
|
}
|
|
#endif
|
|
|
|
return abstract_face;
|
|
}
|
|
|
|
const cairo_font_face_backend_t _cairo_ft_font_face_backend = {
|
|
CAIRO_FONT_TYPE_FT,
|
|
#if CAIRO_HAS_FC_FONT
|
|
_cairo_ft_font_face_create_for_toy,
|
|
#else
|
|
NULL,
|
|
#endif
|
|
_cairo_ft_font_face_destroy,
|
|
_cairo_ft_font_face_scaled_font_create,
|
|
_cairo_ft_font_face_get_implementation
|
|
};
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
static cairo_font_face_t *
|
|
_cairo_ft_font_face_create_for_pattern (FcPattern *pattern)
|
|
{
|
|
cairo_ft_font_face_t *font_face;
|
|
|
|
font_face = malloc (sizeof (cairo_ft_font_face_t));
|
|
if (unlikely (font_face == NULL)) {
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
return (cairo_font_face_t *) &_cairo_font_face_nil;
|
|
}
|
|
|
|
font_face->unscaled = NULL;
|
|
font_face->next = NULL;
|
|
|
|
font_face->pattern = FcPatternDuplicate (pattern);
|
|
if (unlikely (font_face->pattern == NULL)) {
|
|
free (font_face);
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
return (cairo_font_face_t *) &_cairo_font_face_nil;
|
|
}
|
|
|
|
font_face->resolved_font_face = NULL;
|
|
font_face->resolved_config = NULL;
|
|
|
|
_cairo_font_face_init (&font_face->base, &_cairo_ft_font_face_backend);
|
|
|
|
return &font_face->base;
|
|
}
|
|
#endif
|
|
|
|
static cairo_font_face_t *
|
|
_cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled,
|
|
cairo_ft_options_t *ft_options)
|
|
{
|
|
cairo_ft_font_face_t *font_face, **prev_font_face;
|
|
|
|
/* Looked for an existing matching font face */
|
|
for (font_face = unscaled->faces, prev_font_face = &unscaled->faces;
|
|
font_face;
|
|
prev_font_face = &font_face->next, font_face = font_face->next)
|
|
{
|
|
if (font_face->ft_options.load_flags == ft_options->load_flags &&
|
|
font_face->ft_options.synth_flags == ft_options->synth_flags &&
|
|
cairo_font_options_equal (&font_face->ft_options.base, &ft_options->base))
|
|
{
|
|
if (font_face->base.status) {
|
|
/* The font_face has been left in an error state, abandon it. */
|
|
*prev_font_face = font_face->next;
|
|
break;
|
|
}
|
|
|
|
if (font_face->unscaled == NULL) {
|
|
/* Resurrect this "zombie" font_face (from
|
|
* _cairo_ft_font_face_destroy), switching its unscaled_font
|
|
* from owner to ownee. */
|
|
font_face->unscaled = unscaled;
|
|
_cairo_unscaled_font_reference (&unscaled->base);
|
|
return &font_face->base;
|
|
} else
|
|
return cairo_font_face_reference (&font_face->base);
|
|
}
|
|
}
|
|
|
|
/* No match found, create a new one */
|
|
font_face = malloc (sizeof (cairo_ft_font_face_t));
|
|
if (unlikely (!font_face)) {
|
|
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
|
|
return (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
}
|
|
|
|
font_face->unscaled = unscaled;
|
|
_cairo_unscaled_font_reference (&unscaled->base);
|
|
|
|
font_face->ft_options = *ft_options;
|
|
|
|
if (unscaled->faces && unscaled->faces->unscaled == NULL) {
|
|
/* This "zombie" font_face (from _cairo_ft_font_face_destroy)
|
|
* is no longer needed. */
|
|
assert (unscaled->from_face && unscaled->faces->next == NULL);
|
|
cairo_font_face_destroy (&unscaled->faces->base);
|
|
unscaled->faces = NULL;
|
|
}
|
|
|
|
font_face->next = unscaled->faces;
|
|
unscaled->faces = font_face;
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
font_face->pattern = NULL;
|
|
#endif
|
|
|
|
_cairo_font_face_init (&font_face->base, &_cairo_ft_font_face_backend);
|
|
|
|
return &font_face->base;
|
|
}
|
|
|
|
/* implement the platform-specific interface */
|
|
|
|
#if CAIRO_HAS_FC_FONT
|
|
static cairo_status_t
|
|
_cairo_ft_font_options_substitute (const cairo_font_options_t *options,
|
|
FcPattern *pattern)
|
|
{
|
|
FcValue v;
|
|
|
|
if (options->antialias != CAIRO_ANTIALIAS_DEFAULT)
|
|
{
|
|
if (FcPatternGet (pattern, FC_ANTIALIAS, 0, &v) == FcResultNoMatch)
|
|
{
|
|
if (! FcPatternAddBool (pattern,
|
|
FC_ANTIALIAS,
|
|
options->antialias != CAIRO_ANTIALIAS_NONE))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
|
|
if (options->antialias != CAIRO_ANTIALIAS_SUBPIXEL) {
|
|
FcPatternDel (pattern, FC_RGBA);
|
|
if (! FcPatternAddInteger (pattern, FC_RGBA, FC_RGBA_NONE))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (options->antialias != CAIRO_ANTIALIAS_DEFAULT)
|
|
{
|
|
if (FcPatternGet (pattern, FC_RGBA, 0, &v) == FcResultNoMatch)
|
|
{
|
|
int rgba;
|
|
|
|
if (options->antialias == CAIRO_ANTIALIAS_SUBPIXEL) {
|
|
switch (options->subpixel_order) {
|
|
case CAIRO_SUBPIXEL_ORDER_DEFAULT:
|
|
case CAIRO_SUBPIXEL_ORDER_RGB:
|
|
default:
|
|
rgba = FC_RGBA_RGB;
|
|
break;
|
|
case CAIRO_SUBPIXEL_ORDER_BGR:
|
|
rgba = FC_RGBA_BGR;
|
|
break;
|
|
case CAIRO_SUBPIXEL_ORDER_VRGB:
|
|
rgba = FC_RGBA_VRGB;
|
|
break;
|
|
case CAIRO_SUBPIXEL_ORDER_VBGR:
|
|
rgba = FC_RGBA_VBGR;
|
|
break;
|
|
}
|
|
} else {
|
|
rgba = FC_RGBA_NONE;
|
|
}
|
|
|
|
if (! FcPatternAddInteger (pattern, FC_RGBA, rgba))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
}
|
|
}
|
|
|
|
if (options->lcd_filter != CAIRO_LCD_FILTER_DEFAULT)
|
|
{
|
|
if (FcPatternGet (pattern, FC_LCD_FILTER, 0, &v) == FcResultNoMatch)
|
|
{
|
|
int lcd_filter;
|
|
|
|
switch (options->lcd_filter) {
|
|
case CAIRO_LCD_FILTER_NONE:
|
|
lcd_filter = FT_LCD_FILTER_NONE;
|
|
break;
|
|
case CAIRO_LCD_FILTER_DEFAULT:
|
|
case CAIRO_LCD_FILTER_INTRA_PIXEL:
|
|
lcd_filter = FT_LCD_FILTER_LEGACY;
|
|
break;
|
|
case CAIRO_LCD_FILTER_FIR3:
|
|
lcd_filter = FT_LCD_FILTER_LIGHT;
|
|
break;
|
|
default:
|
|
case CAIRO_LCD_FILTER_FIR5:
|
|
lcd_filter = FT_LCD_FILTER_DEFAULT;
|
|
break;
|
|
}
|
|
|
|
if (! FcPatternAddInteger (pattern, FC_LCD_FILTER, lcd_filter))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
}
|
|
}
|
|
|
|
if (options->hint_style != CAIRO_HINT_STYLE_DEFAULT)
|
|
{
|
|
if (FcPatternGet (pattern, FC_HINTING, 0, &v) == FcResultNoMatch)
|
|
{
|
|
if (! FcPatternAddBool (pattern,
|
|
FC_HINTING,
|
|
options->hint_style != CAIRO_HINT_STYLE_NONE))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
}
|
|
|
|
#ifdef FC_HINT_STYLE
|
|
if (FcPatternGet (pattern, FC_HINT_STYLE, 0, &v) == FcResultNoMatch)
|
|
{
|
|
int hint_style;
|
|
|
|
switch (options->hint_style) {
|
|
case CAIRO_HINT_STYLE_NONE:
|
|
hint_style = FC_HINT_NONE;
|
|
break;
|
|
case CAIRO_HINT_STYLE_SLIGHT:
|
|
hint_style = FC_HINT_SLIGHT;
|
|
break;
|
|
case CAIRO_HINT_STYLE_MEDIUM:
|
|
hint_style = FC_HINT_MEDIUM;
|
|
break;
|
|
case CAIRO_HINT_STYLE_FULL:
|
|
case CAIRO_HINT_STYLE_DEFAULT:
|
|
default:
|
|
hint_style = FC_HINT_FULL;
|
|
break;
|
|
}
|
|
|
|
if (! FcPatternAddInteger (pattern, FC_HINT_STYLE, hint_style))
|
|
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* cairo_ft_font_options_substitute:
|
|
* @options: a #cairo_font_options_t object
|
|
* @pattern: an existing #FcPattern
|
|
*
|
|
* Add options to a #FcPattern based on a #cairo_font_options_t font
|
|
* options object. Options that are already in the pattern, are not overridden,
|
|
* so you should call this function after calling FcConfigSubstitute() (the
|
|
* user's settings should override options based on the surface type), but
|
|
* before calling FcDefaultSubstitute().
|
|
*
|
|
* Since: 1.0
|
|
**/
|
|
void
|
|
cairo_ft_font_options_substitute (const cairo_font_options_t *options,
|
|
FcPattern *pattern)
|
|
{
|
|
if (cairo_font_options_status ((cairo_font_options_t *) options))
|
|
return;
|
|
|
|
_cairo_ft_font_options_substitute (options, pattern);
|
|
}
|
|
|
|
static cairo_font_face_t *
|
|
_cairo_ft_resolve_pattern (FcPattern *pattern,
|
|
const cairo_matrix_t *font_matrix,
|
|
const cairo_matrix_t *ctm,
|
|
const cairo_font_options_t *font_options)
|
|
{
|
|
cairo_status_t status;
|
|
|
|
cairo_matrix_t scale;
|
|
FcPattern *resolved;
|
|
cairo_ft_font_transform_t sf;
|
|
FcResult result;
|
|
cairo_ft_unscaled_font_t *unscaled;
|
|
cairo_ft_options_t ft_options;
|
|
cairo_font_face_t *font_face;
|
|
|
|
scale = *ctm;
|
|
scale.x0 = scale.y0 = 0;
|
|
cairo_matrix_multiply (&scale,
|
|
font_matrix,
|
|
&scale);
|
|
|
|
status = _compute_transform (&sf, &scale, NULL);
|
|
if (unlikely (status))
|
|
return (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
|
|
pattern = FcPatternDuplicate (pattern);
|
|
if (pattern == NULL)
|
|
return (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
|
|
if (! FcPatternAddDouble (pattern, FC_PIXEL_SIZE, sf.y_scale)) {
|
|
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
if (! FcConfigSubstitute (NULL, pattern, FcMatchPattern)) {
|
|
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
status = _cairo_ft_font_options_substitute (font_options, pattern);
|
|
if (status) {
|
|
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
FcDefaultSubstitute (pattern);
|
|
|
|
status = _cairo_ft_unscaled_font_create_for_pattern (pattern, &unscaled);
|
|
if (unlikely (status)) {
|
|
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
if (unscaled == NULL) {
|
|
resolved = FcFontMatch (NULL, pattern, &result);
|
|
if (!resolved) {
|
|
/* We failed to find any font. Substitute twin so that the user can
|
|
* see something (and hopefully recognise that the font is missing)
|
|
* and not just receive a NO_MEMORY error during rendering.
|
|
*/
|
|
font_face = _cairo_font_face_twin_create_fallback ();
|
|
goto FREE_PATTERN;
|
|
}
|
|
|
|
status = _cairo_ft_unscaled_font_create_for_pattern (resolved, &unscaled);
|
|
if (unlikely (status || unscaled == NULL)) {
|
|
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
goto FREE_RESOLVED;
|
|
}
|
|
} else
|
|
resolved = pattern;
|
|
|
|
_get_pattern_ft_options (resolved, &ft_options);
|
|
font_face = _cairo_ft_font_face_create (unscaled, &ft_options);
|
|
_cairo_unscaled_font_destroy (&unscaled->base);
|
|
|
|
FREE_RESOLVED:
|
|
if (resolved != pattern)
|
|
FcPatternDestroy (resolved);
|
|
|
|
FREE_PATTERN:
|
|
FcPatternDestroy (pattern);
|
|
|
|
return font_face;
|
|
}
|
|
|
|
/**
|
|
* cairo_ft_font_face_create_for_pattern:
|
|
* @pattern: A fontconfig pattern. Cairo makes a copy of the pattern
|
|
* if it needs to. You are free to modify or free @pattern after this call.
|
|
*
|
|
* Creates a new font face for the FreeType font backend based on a
|
|
* fontconfig pattern. This font can then be used with
|
|
* cairo_set_font_face() or cairo_scaled_font_create(). The
|
|
* #cairo_scaled_font_t returned from cairo_scaled_font_create() is
|
|
* also for the FreeType backend and can be used with functions such
|
|
* as cairo_ft_scaled_font_lock_face().
|
|
*
|
|
* Font rendering options are represented both here and when you
|
|
* call cairo_scaled_font_create(). Font options that have a representation
|
|
* in a #FcPattern must be passed in here; to modify #FcPattern
|
|
* appropriately to reflect the options in a #cairo_font_options_t, call
|
|
* cairo_ft_font_options_substitute().
|
|
*
|
|
* The pattern's FC_FT_FACE element is inspected first and if that is set,
|
|
* that will be the FreeType font face associated with the returned cairo
|
|
* font face. Otherwise the FC_FILE element is checked. If it's set,
|
|
* that and the value of the FC_INDEX element (defaults to zero) of @pattern
|
|
* are used to load a font face from file.
|
|
*
|
|
* If both steps from the previous paragraph fails, @pattern will be passed
|
|
* to FcConfigSubstitute, FcDefaultSubstitute, and finally FcFontMatch,
|
|
* and the resulting font pattern is used.
|
|
*
|
|
* If the FC_FT_FACE element of @pattern is set, the user is responsible
|
|
* for making sure that the referenced FT_Face remains valid for the life
|
|
* time of the returned #cairo_font_face_t. See
|
|
* cairo_ft_font_face_create_for_ft_face() for an example of how to couple
|
|
* the life time of the FT_Face to that of the cairo font-face.
|
|
*
|
|
* Return value: a newly created #cairo_font_face_t. Free with
|
|
* cairo_font_face_destroy() when you are done using it.
|
|
*
|
|
* Since: 1.0
|
|
**/
|
|
cairo_font_face_t *
|
|
cairo_ft_font_face_create_for_pattern (FcPattern *pattern)
|
|
{
|
|
cairo_ft_unscaled_font_t *unscaled;
|
|
cairo_font_face_t *font_face;
|
|
cairo_ft_options_t ft_options;
|
|
cairo_status_t status;
|
|
|
|
status = _cairo_ft_unscaled_font_create_for_pattern (pattern, &unscaled);
|
|
if (unlikely (status))
|
|
return (cairo_font_face_t *) &_cairo_font_face_nil;
|
|
if (unlikely (unscaled == NULL)) {
|
|
/* Store the pattern. We will resolve it and create unscaled
|
|
* font when creating scaled fonts */
|
|
return _cairo_ft_font_face_create_for_pattern (pattern);
|
|
}
|
|
|
|
_get_pattern_ft_options (pattern, &ft_options);
|
|
font_face = _cairo_ft_font_face_create (unscaled, &ft_options);
|
|
_cairo_unscaled_font_destroy (&unscaled->base);
|
|
|
|
return font_face;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* cairo_ft_font_face_create_for_ft_face:
|
|
* @face: A FreeType face object, already opened. This must
|
|
* be kept around until the face's ref_count drops to
|
|
* zero and it is freed. Since the face may be referenced
|
|
* internally to Cairo, the best way to determine when it
|
|
* is safe to free the face is to pass a
|
|
* #cairo_destroy_func_t to cairo_font_face_set_user_data()
|
|
* @load_flags: flags to pass to FT_Load_Glyph when loading
|
|
* glyphs from the font. These flags are OR'ed together with
|
|
* the flags derived from the #cairo_font_options_t passed
|
|
* to cairo_scaled_font_create(), so only a few values such
|
|
* as %FT_LOAD_VERTICAL_LAYOUT, and %FT_LOAD_FORCE_AUTOHINT
|
|
* are useful. You should not pass any of the flags affecting
|
|
* the load target, such as %FT_LOAD_TARGET_LIGHT.
|
|
*
|
|
* Creates a new font face for the FreeType font backend from a
|
|
* pre-opened FreeType face. This font can then be used with
|
|
* cairo_set_font_face() or cairo_scaled_font_create(). The
|
|
* #cairo_scaled_font_t returned from cairo_scaled_font_create() is
|
|
* also for the FreeType backend and can be used with functions such
|
|
* as cairo_ft_scaled_font_lock_face(). Note that Cairo may keep a reference
|
|
* to the FT_Face alive in a font-cache and the exact lifetime of the reference
|
|
* depends highly upon the exact usage pattern and is subject to external
|
|
* factors. You must not call FT_Done_Face() before the last reference to the
|
|
* #cairo_font_face_t has been dropped.
|
|
*
|
|
* As an example, below is how one might correctly couple the lifetime of
|
|
* the FreeType face object to the #cairo_font_face_t.
|
|
*
|
|
* <informalexample><programlisting>
|
|
* static const cairo_user_data_key_t key;
|
|
*
|
|
* font_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0);
|
|
* status = cairo_font_face_set_user_data (font_face, &key,
|
|
* ft_face, (cairo_destroy_func_t) FT_Done_Face);
|
|
* if (status) {
|
|
* cairo_font_face_destroy (font_face);
|
|
* FT_Done_Face (ft_face);
|
|
* return ERROR;
|
|
* }
|
|
* </programlisting></informalexample>
|
|
*
|
|
* Return value: a newly created #cairo_font_face_t. Free with
|
|
* cairo_font_face_destroy() when you are done using it.
|
|
*
|
|
* Since: 1.0
|
|
**/
|
|
cairo_font_face_t *
|
|
cairo_ft_font_face_create_for_ft_face (FT_Face face,
|
|
int load_flags)
|
|
{
|
|
cairo_ft_unscaled_font_t *unscaled;
|
|
cairo_font_face_t *font_face;
|
|
cairo_ft_options_t ft_options;
|
|
cairo_status_t status;
|
|
|
|
status = _cairo_ft_unscaled_font_create_from_face (face, &unscaled);
|
|
if (unlikely (status))
|
|
return (cairo_font_face_t *)&_cairo_font_face_nil;
|
|
|
|
ft_options.load_flags = load_flags;
|
|
ft_options.synth_flags = 0;
|
|
_cairo_font_options_init_default (&ft_options.base);
|
|
|
|
font_face = _cairo_ft_font_face_create (unscaled, &ft_options);
|
|
_cairo_unscaled_font_destroy (&unscaled->base);
|
|
|
|
return font_face;
|
|
}
|
|
|
|
/**
|
|
* cairo_ft_font_face_set_synthesize:
|
|
* @font_face: The #cairo_ft_font_face_t object to modify
|
|
* @synth_flags: the set of synthesis options to enable
|
|
*
|
|
* FreeType provides the ability to synthesize different glyphs from a base
|
|
* font, which is useful if you lack those glyphs from a true bold or oblique
|
|
* font. See also #cairo_ft_synthesize_t.
|
|
*
|
|
* Since: 1.12
|
|
**/
|
|
void
|
|
cairo_ft_font_face_set_synthesize (cairo_font_face_t *font_face,
|
|
unsigned int synth_flags)
|
|
{
|
|
cairo_ft_font_face_t *ft;
|
|
|
|
if (font_face->backend->type != CAIRO_FONT_TYPE_FT)
|
|
return;
|
|
|
|
ft = (cairo_ft_font_face_t *) font_face;
|
|
ft->ft_options.synth_flags |= synth_flags;
|
|
}
|
|
|
|
/**
|
|
* cairo_ft_font_face_unset_synthesize:
|
|
* @font_face: The #cairo_ft_font_face_t object to modify
|
|
* @synth_flags: the set of synthesis options to disable
|
|
*
|
|
* See cairo_ft_font_face_set_synthesize().
|
|
*
|
|
* Since: 1.12
|
|
**/
|
|
void
|
|
cairo_ft_font_face_unset_synthesize (cairo_font_face_t *font_face,
|
|
unsigned int synth_flags)
|
|
{
|
|
cairo_ft_font_face_t *ft;
|
|
|
|
if (font_face->backend->type != CAIRO_FONT_TYPE_FT)
|
|
return;
|
|
|
|
ft = (cairo_ft_font_face_t *) font_face;
|
|
ft->ft_options.synth_flags &= ~synth_flags;
|
|
}
|
|
|
|
/**
|
|
* cairo_ft_font_face_get_synthesize:
|
|
* @font_face: The #cairo_ft_font_face_t object to query
|
|
*
|
|
* See #cairo_ft_synthesize_t.
|
|
*
|
|
* Returns: the current set of synthesis options.
|
|
*
|
|
* Since: 1.12
|
|
**/
|
|
unsigned int
|
|
cairo_ft_font_face_get_synthesize (cairo_font_face_t *font_face)
|
|
{
|
|
cairo_ft_font_face_t *ft;
|
|
|
|
if (font_face->backend->type != CAIRO_FONT_TYPE_FT)
|
|
return 0;
|
|
|
|
ft = (cairo_ft_font_face_t *) font_face;
|
|
return ft->ft_options.synth_flags;
|
|
}
|
|
|
|
/**
|
|
* cairo_ft_scaled_font_lock_face:
|
|
* @scaled_font: A #cairo_scaled_font_t from the FreeType font backend. Such an
|
|
* object can be created by calling cairo_scaled_font_create() on a
|
|
* FreeType backend font face (see cairo_ft_font_face_create_for_pattern(),
|
|
* cairo_ft_font_face_create_for_ft_face()).
|
|
*
|
|
* cairo_ft_scaled_font_lock_face() gets the #FT_Face object from a FreeType
|
|
* backend font and scales it appropriately for the font. You must
|
|
* release the face with cairo_ft_scaled_font_unlock_face()
|
|
* when you are done using it. Since the #FT_Face object can be
|
|
* shared between multiple #cairo_scaled_font_t objects, you must not
|
|
* lock any other font objects until you unlock this one. A count is
|
|
* kept of the number of times cairo_ft_scaled_font_lock_face() is
|
|
* called. cairo_ft_scaled_font_unlock_face() must be called the same number
|
|
* of times.
|
|
*
|
|
* You must be careful when using this function in a library or in a
|
|
* threaded application, because freetype's design makes it unsafe to
|
|
* call freetype functions simultaneously from multiple threads, (even
|
|
* if using distinct FT_Face objects). Because of this, application
|
|
* code that acquires an FT_Face object with this call must add its
|
|
* own locking to protect any use of that object, (and which also must
|
|
* protect any other calls into cairo as almost any cairo function
|
|
* might result in a call into the freetype library).
|
|
*
|
|
* Return value: The #FT_Face object for @font, scaled appropriately,
|
|
* or %NULL if @scaled_font is in an error state (see
|
|
* cairo_scaled_font_status()) or there is insufficient memory.
|
|
*
|
|
* Since: 1.0
|
|
**/
|
|
FT_Face
|
|
cairo_ft_scaled_font_lock_face (cairo_scaled_font_t *abstract_font)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = (cairo_ft_scaled_font_t *) abstract_font;
|
|
FT_Face face;
|
|
cairo_status_t status;
|
|
|
|
if (! _cairo_scaled_font_is_ft (abstract_font)) {
|
|
_cairo_error_throw (CAIRO_STATUS_FONT_TYPE_MISMATCH);
|
|
return NULL;
|
|
}
|
|
|
|
if (scaled_font->base.status)
|
|
return NULL;
|
|
|
|
face = _cairo_ft_unscaled_font_lock_face (scaled_font->unscaled);
|
|
if (unlikely (face == NULL)) {
|
|
status = _cairo_scaled_font_set_error (&scaled_font->base, CAIRO_STATUS_NO_MEMORY);
|
|
return NULL;
|
|
}
|
|
|
|
status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled,
|
|
&scaled_font->base.scale);
|
|
if (unlikely (status)) {
|
|
_cairo_ft_unscaled_font_unlock_face (scaled_font->unscaled);
|
|
status = _cairo_scaled_font_set_error (&scaled_font->base, status);
|
|
return NULL;
|
|
}
|
|
|
|
/* Note: We deliberately release the unscaled font's mutex here,
|
|
* so that we are not holding a lock across two separate calls to
|
|
* cairo function, (which would give the application some
|
|
* opportunity for creating deadlock. This is obviously unsafe,
|
|
* but as documented, the user must add manual locking when using
|
|
* this function. */
|
|
CAIRO_MUTEX_UNLOCK (scaled_font->unscaled->mutex);
|
|
|
|
return face;
|
|
}
|
|
|
|
/**
|
|
* cairo_ft_scaled_font_unlock_face:
|
|
* @scaled_font: A #cairo_scaled_font_t from the FreeType font backend. Such an
|
|
* object can be created by calling cairo_scaled_font_create() on a
|
|
* FreeType backend font face (see cairo_ft_font_face_create_for_pattern(),
|
|
* cairo_ft_font_face_create_for_ft_face()).
|
|
*
|
|
* Releases a face obtained with cairo_ft_scaled_font_lock_face().
|
|
*
|
|
* Since: 1.0
|
|
**/
|
|
void
|
|
cairo_ft_scaled_font_unlock_face (cairo_scaled_font_t *abstract_font)
|
|
{
|
|
cairo_ft_scaled_font_t *scaled_font = (cairo_ft_scaled_font_t *) abstract_font;
|
|
|
|
if (! _cairo_scaled_font_is_ft (abstract_font)) {
|
|
_cairo_error_throw (CAIRO_STATUS_FONT_TYPE_MISMATCH);
|
|
return;
|
|
}
|
|
|
|
if (scaled_font->base.status)
|
|
return;
|
|
|
|
/* Note: We released the unscaled font's mutex at the end of
|
|
* cairo_ft_scaled_font_lock_face, so we have to acquire it again
|
|
* as _cairo_ft_unscaled_font_unlock_face expects it to be held
|
|
* when we call into it. */
|
|
CAIRO_MUTEX_LOCK (scaled_font->unscaled->mutex);
|
|
|
|
_cairo_ft_unscaled_font_unlock_face (scaled_font->unscaled);
|
|
}
|
|
|
|
static cairo_bool_t
|
|
_cairo_ft_scaled_font_is_vertical (cairo_scaled_font_t *scaled_font)
|
|
{
|
|
cairo_ft_scaled_font_t *ft_scaled_font;
|
|
|
|
if (!_cairo_scaled_font_is_ft (scaled_font))
|
|
return FALSE;
|
|
|
|
ft_scaled_font = (cairo_ft_scaled_font_t *) scaled_font;
|
|
if (ft_scaled_font->ft_options.load_flags & FT_LOAD_VERTICAL_LAYOUT)
|
|
return TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
unsigned int
|
|
_cairo_ft_scaled_font_get_load_flags (cairo_scaled_font_t *scaled_font)
|
|
{
|
|
cairo_ft_scaled_font_t *ft_scaled_font;
|
|
|
|
if (! _cairo_scaled_font_is_ft (scaled_font))
|
|
return 0;
|
|
|
|
ft_scaled_font = (cairo_ft_scaled_font_t *) scaled_font;
|
|
return ft_scaled_font->ft_options.load_flags;
|
|
}
|
|
|
|
void
|
|
_cairo_ft_font_reset_static_data (void)
|
|
{
|
|
_cairo_ft_unscaled_font_map_destroy ();
|
|
}
|