1283 lines
36 KiB
C++
1283 lines
36 KiB
C++
/*
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* Copyright © 2009 Red Hat, Inc.
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* Copyright © 2009 Keith Stribley
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* Copyright © 2015 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb.hh"
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#ifdef HAVE_FREETYPE
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#include "hb-ft.h"
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#include "hb-draw.hh"
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#include "hb-font.hh"
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#include "hb-machinery.hh"
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#include "hb-cache.hh"
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#include "hb-ot-os2-table.hh"
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#include "hb-ot-shaper-arabic-pua.hh"
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#include FT_ADVANCES_H
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#include FT_MULTIPLE_MASTERS_H
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#include FT_OUTLINE_H
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#include FT_TRUETYPE_TABLES_H
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/**
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* SECTION:hb-ft
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* @title: hb-ft
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* @short_description: FreeType integration
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* @include: hb-ft.h
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*
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* Functions for using HarfBuzz with the FreeType library.
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*
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* HarfBuzz supports using FreeType to provide face and
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* font data.
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*
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* <note>Note that FreeType is not thread-safe, therefore these
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* functions are not thread-safe either.</note>
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**/
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/* TODO:
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*
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* In general, this file does a fine job of what it's supposed to do.
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* There are, however, things that need more work:
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*
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* - FreeType works in 26.6 mode. Clients can decide to use that mode, and everything
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* would work fine. However, we also abuse this API for performing in font-space,
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* but don't pass the correct flags to FreeType. We just abuse the no-hinting mode
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* for that, such that no rounding etc happens. As such, we don't set ppem, and
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* pass NO_HINTING as load_flags. Would be much better to use NO_SCALE, and scale
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* ourselves.
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*
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* - We don't handle / allow for emboldening / obliqueing.
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*
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* - In the future, we should add constructors to create fonts in font space?
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*/
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using hb_ft_advance_cache_t = hb_cache_t<16, 24, 8, false>;
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struct hb_ft_font_t
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{
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int load_flags;
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bool symbol; /* Whether selected cmap is symbol cmap. */
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bool unref; /* Whether to destroy ft_face when done. */
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bool transform; /* Whether to apply FT_Face's transform. */
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mutable hb_mutex_t lock;
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FT_Face ft_face;
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mutable unsigned cached_serial;
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mutable hb_ft_advance_cache_t advance_cache;
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};
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static hb_ft_font_t *
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_hb_ft_font_create (FT_Face ft_face, bool symbol, bool unref)
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{
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hb_ft_font_t *ft_font = (hb_ft_font_t *) hb_calloc (1, sizeof (hb_ft_font_t));
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if (unlikely (!ft_font)) return nullptr;
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ft_font->lock.init ();
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ft_font->ft_face = ft_face;
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ft_font->symbol = symbol;
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ft_font->unref = unref;
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ft_font->load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
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ft_font->cached_serial = (unsigned) -1;
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ft_font->advance_cache.init ();
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return ft_font;
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}
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static void
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_hb_ft_face_destroy (void *data)
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{
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FT_Done_Face ((FT_Face) data);
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}
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static void
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_hb_ft_font_destroy (void *data)
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{
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hb_ft_font_t *ft_font = (hb_ft_font_t *) data;
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ft_font->advance_cache.fini ();
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if (ft_font->unref)
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_hb_ft_face_destroy (ft_font->ft_face);
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ft_font->lock.fini ();
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hb_free (ft_font);
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}
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/* hb_font changed, update FT_Face. */
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static void _hb_ft_hb_font_changed (hb_font_t *font, FT_Face ft_face)
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{
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hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
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float x_mult = 1.f, y_mult = 1.f;
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if (font->x_scale < 0) x_mult = -x_mult;
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if (font->y_scale < 0) y_mult = -y_mult;
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if (FT_Set_Char_Size (ft_face,
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abs (font->x_scale), abs (font->y_scale),
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0, 0
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#if 0
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font->x_ppem * 72 * 64 / font->x_scale,
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font->y_ppem * 72 * 64 / font->y_scale
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#endif
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) && ft_face->num_fixed_sizes)
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{
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#ifdef HAVE_FT_GET_TRANSFORM
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/* Bitmap font, eg. bitmap color emoji. */
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/* TODO Pick largest size? */
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int x_scale = ft_face->available_sizes[0].x_ppem;
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int y_scale = ft_face->available_sizes[0].y_ppem;
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FT_Set_Char_Size (ft_face,
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x_scale, y_scale,
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0, 0);
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/* This contains the sign that was previously in x_mult/y_mult. */
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x_mult = (float) font->x_scale / x_scale;
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y_mult = (float) font->y_scale / y_scale;
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#endif
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}
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else
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{ /* Shrug */ }
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if (x_mult != 1.f || y_mult != 1.f)
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{
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FT_Matrix matrix = { (int) roundf (x_mult * (1<<16)), 0,
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0, (int) roundf (y_mult * (1<<16))};
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FT_Set_Transform (ft_face, &matrix, nullptr);
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ft_font->transform = true;
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}
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#if defined(HAVE_FT_GET_VAR_BLEND_COORDINATES) && !defined(HB_NO_VAR)
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unsigned int num_coords;
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const float *coords = hb_font_get_var_coords_design (font, &num_coords);
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if (num_coords)
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{
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FT_Fixed *ft_coords = (FT_Fixed *) hb_calloc (num_coords, sizeof (FT_Fixed));
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if (ft_coords)
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{
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for (unsigned int i = 0; i < num_coords; i++)
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ft_coords[i] = coords[i] * 65536.f;
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FT_Set_Var_Design_Coordinates (ft_face, num_coords, ft_coords);
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hb_free (ft_coords);
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}
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}
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#endif
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}
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/* Check if hb_font changed, update FT_Face. */
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static inline bool
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_hb_ft_hb_font_check_changed (hb_font_t *font,
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const hb_ft_font_t *ft_font)
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{
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if (font->serial != ft_font->cached_serial)
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{
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_hb_ft_hb_font_changed (font, ft_font->ft_face);
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ft_font->advance_cache.clear ();
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ft_font->cached_serial = font->serial;
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return true;
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}
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return false;
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}
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/**
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* hb_ft_font_set_load_flags:
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* @font: #hb_font_t to work upon
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* @load_flags: The FreeType load flags to set
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*
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* Sets the FT_Load_Glyph load flags for the specified #hb_font_t.
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*
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* For more information, see
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* https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#ft_load_xxx
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*
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* Since: 1.0.5
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**/
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void
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hb_ft_font_set_load_flags (hb_font_t *font, int load_flags)
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{
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if (hb_object_is_immutable (font))
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return;
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if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
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return;
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hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
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ft_font->load_flags = load_flags;
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}
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/**
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* hb_ft_font_get_load_flags:
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* @font: #hb_font_t to work upon
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*
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* Fetches the FT_Load_Glyph load flags of the specified #hb_font_t.
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*
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* For more information, see
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* https://www.freetype.org/freetype2/docs/reference/ft2-base_interface.html#ft_load_xxx
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*
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* Return value: FT_Load_Glyph flags found
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*
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* Since: 1.0.5
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**/
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int
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hb_ft_font_get_load_flags (hb_font_t *font)
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{
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if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
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return 0;
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
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return ft_font->load_flags;
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}
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/**
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* hb_ft_font_get_face: (skip)
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* @font: #hb_font_t to work upon
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*
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* Fetches the FT_Face associated with the specified #hb_font_t
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* font object.
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*
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* Return value: (nullable): the FT_Face found or `NULL`
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*
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* Since: 0.9.2
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**/
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FT_Face
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hb_ft_font_get_face (hb_font_t *font)
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{
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if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
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return nullptr;
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
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return ft_font->ft_face;
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}
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/**
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* hb_ft_font_lock_face: (skip)
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* @font: #hb_font_t to work upon
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*
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* Gets the FT_Face associated with @font, This face will be kept around until
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* you call hb_ft_font_unlock_face().
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*
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* Return value: (nullable) (transfer none): the FT_Face associated with @font or `NULL`
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* Since: 2.6.5
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**/
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FT_Face
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hb_ft_font_lock_face (hb_font_t *font)
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{
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if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
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return nullptr;
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
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ft_font->lock.lock ();
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return ft_font->ft_face;
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}
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/**
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* hb_ft_font_unlock_face: (skip)
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* @font: #hb_font_t to work upon
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*
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* Releases an FT_Face previously obtained with hb_ft_font_lock_face().
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*
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* Since: 2.6.5
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**/
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void
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hb_ft_font_unlock_face (hb_font_t *font)
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{
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if (unlikely (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy))
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return;
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font->user_data;
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ft_font->lock.unlock ();
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}
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static hb_bool_t
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hb_ft_get_nominal_glyph (hb_font_t *font,
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void *font_data,
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hb_codepoint_t unicode,
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hb_codepoint_t *glyph,
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void *user_data HB_UNUSED)
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{
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
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hb_lock_t lock (ft_font->lock);
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unsigned int g = FT_Get_Char_Index (ft_font->ft_face, unicode);
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if (unlikely (!g))
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{
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if (unlikely (ft_font->symbol))
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{
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switch ((unsigned) font->face->table.OS2->get_font_page ()) {
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case OT::OS2::font_page_t::FONT_PAGE_NONE:
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if (unicode <= 0x00FFu)
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/* For symbol-encoded OpenType fonts, we duplicate the
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* U+F000..F0FF range at U+0000..U+00FF. That's what
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* Windows seems to do, and that's hinted about at:
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* https://docs.microsoft.com/en-us/typography/opentype/spec/recom
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* under "Non-Standard (Symbol) Fonts". */
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g = FT_Get_Char_Index (ft_font->ft_face, 0xF000u + unicode);
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break;
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#ifndef HB_NO_OT_SHAPER_ARABIC_FALLBACK
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case OT::OS2::font_page_t::FONT_PAGE_SIMP_ARABIC:
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g = FT_Get_Char_Index (ft_font->ft_face, _hb_arabic_pua_simp_map (unicode));
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break;
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case OT::OS2::font_page_t::FONT_PAGE_TRAD_ARABIC:
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g = FT_Get_Char_Index (ft_font->ft_face, _hb_arabic_pua_trad_map (unicode));
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break;
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#endif
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default:
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break;
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}
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if (!g)
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return false;
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}
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else
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return false;
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}
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*glyph = g;
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return true;
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}
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static unsigned int
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hb_ft_get_nominal_glyphs (hb_font_t *font HB_UNUSED,
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void *font_data,
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unsigned int count,
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const hb_codepoint_t *first_unicode,
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unsigned int unicode_stride,
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hb_codepoint_t *first_glyph,
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unsigned int glyph_stride,
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void *user_data HB_UNUSED)
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{
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
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hb_lock_t lock (ft_font->lock);
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unsigned int done;
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for (done = 0;
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done < count && (*first_glyph = FT_Get_Char_Index (ft_font->ft_face, *first_unicode));
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done++)
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{
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first_unicode = &StructAtOffsetUnaligned<hb_codepoint_t> (first_unicode, unicode_stride);
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first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
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}
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/* We don't need to do ft_font->symbol dance here, since HB calls the singular
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* nominal_glyph() for what we don't handle here. */
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return done;
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}
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static hb_bool_t
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hb_ft_get_variation_glyph (hb_font_t *font HB_UNUSED,
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void *font_data,
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hb_codepoint_t unicode,
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hb_codepoint_t variation_selector,
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hb_codepoint_t *glyph,
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void *user_data HB_UNUSED)
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{
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
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hb_lock_t lock (ft_font->lock);
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unsigned int g = FT_Face_GetCharVariantIndex (ft_font->ft_face, unicode, variation_selector);
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if (unlikely (!g))
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return false;
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*glyph = g;
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return true;
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}
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static void
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hb_ft_get_glyph_h_advances (hb_font_t* font, void* font_data,
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unsigned count,
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const hb_codepoint_t *first_glyph,
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unsigned glyph_stride,
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hb_position_t *first_advance,
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unsigned advance_stride,
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void *user_data HB_UNUSED)
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{
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
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hb_lock_t lock (ft_font->lock);
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FT_Face ft_face = ft_font->ft_face;
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int load_flags = ft_font->load_flags;
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float x_mult;
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#ifdef HAVE_FT_GET_TRANSFORM
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if (ft_font->transform)
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{
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FT_Matrix matrix;
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FT_Get_Transform (ft_face, &matrix, nullptr);
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x_mult = sqrtf ((float)matrix.xx * matrix.xx + (float)matrix.xy * matrix.xy) / 65536.f;
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}
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else
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#endif
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{
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x_mult = font->x_scale < 0 ? -1 : +1;
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}
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for (unsigned int i = 0; i < count; i++)
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{
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FT_Fixed v = 0;
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hb_codepoint_t glyph = *first_glyph;
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unsigned int cv;
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if (ft_font->advance_cache.get (glyph, &cv))
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v = cv;
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else
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{
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FT_Get_Advance (ft_face, glyph, load_flags, &v);
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ft_font->advance_cache.set (glyph, v);
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}
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*first_advance = (int) (v * x_mult + (1<<9)) >> 10;
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first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
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first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
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}
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}
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#ifndef HB_NO_VERTICAL
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static hb_position_t
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hb_ft_get_glyph_v_advance (hb_font_t *font,
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void *font_data,
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hb_codepoint_t glyph,
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void *user_data HB_UNUSED)
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{
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const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
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hb_lock_t lock (ft_font->lock);
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FT_Fixed v;
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float y_mult;
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#ifdef HAVE_FT_GET_TRANSFORM
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if (ft_font->transform)
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{
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FT_Matrix matrix;
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FT_Get_Transform (ft_font->ft_face, &matrix, nullptr);
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y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
y_mult = font->y_scale < 0 ? -1 : +1;
|
|
}
|
|
|
|
if (unlikely (FT_Get_Advance (ft_font->ft_face, glyph, ft_font->load_flags | FT_LOAD_VERTICAL_LAYOUT, &v)))
|
|
return 0;
|
|
|
|
v = (int) (y_mult * v);
|
|
|
|
/* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
|
|
* have a Y growing upward. Hence the extra negation. */
|
|
|
|
return (-v + (1<<9)) >> 10;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HB_NO_VERTICAL
|
|
static hb_bool_t
|
|
hb_ft_get_glyph_v_origin (hb_font_t *font,
|
|
void *font_data,
|
|
hb_codepoint_t glyph,
|
|
hb_position_t *x,
|
|
hb_position_t *y,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
float x_mult, y_mult;
|
|
#ifdef HAVE_FT_GET_TRANSFORM
|
|
if (ft_font->transform)
|
|
{
|
|
FT_Matrix matrix;
|
|
FT_Get_Transform (ft_face, &matrix, nullptr);
|
|
x_mult = sqrtf ((float)matrix.xx * matrix.xx + (float)matrix.xy * matrix.xy) / 65536.f;
|
|
y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
x_mult = font->x_scale < 0 ? -1 : +1;
|
|
y_mult = font->y_scale < 0 ? -1 : +1;
|
|
}
|
|
|
|
if (unlikely (FT_Load_Glyph (ft_face, glyph, ft_font->load_flags)))
|
|
return false;
|
|
|
|
/* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
|
|
* have a Y growing upward. Hence the extra negation. */
|
|
*x = ft_face->glyph->metrics.horiBearingX - ft_face->glyph->metrics.vertBearingX;
|
|
*y = ft_face->glyph->metrics.horiBearingY - (-ft_face->glyph->metrics.vertBearingY);
|
|
|
|
*x = (hb_position_t) (x_mult * *x);
|
|
*y = (hb_position_t) (y_mult * *y);
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HB_NO_OT_SHAPE_FALLBACK
|
|
static hb_position_t
|
|
hb_ft_get_glyph_h_kerning (hb_font_t *font,
|
|
void *font_data,
|
|
hb_codepoint_t left_glyph,
|
|
hb_codepoint_t right_glyph,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Vector kerningv;
|
|
|
|
FT_Kerning_Mode mode = font->x_ppem ? FT_KERNING_DEFAULT : FT_KERNING_UNFITTED;
|
|
if (FT_Get_Kerning (ft_font->ft_face, left_glyph, right_glyph, mode, &kerningv))
|
|
return 0;
|
|
|
|
return kerningv.x;
|
|
}
|
|
#endif
|
|
|
|
static hb_bool_t
|
|
hb_ft_get_glyph_extents (hb_font_t *font,
|
|
void *font_data,
|
|
hb_codepoint_t glyph,
|
|
hb_glyph_extents_t *extents,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
float x_mult, y_mult;
|
|
#ifdef HAVE_FT_GET_TRANSFORM
|
|
if (ft_font->transform)
|
|
{
|
|
FT_Matrix matrix;
|
|
FT_Get_Transform (ft_face, &matrix, nullptr);
|
|
x_mult = sqrtf ((float)matrix.xx * matrix.xx + (float)matrix.xy * matrix.xy) / 65536.f;
|
|
y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
x_mult = font->x_scale < 0 ? -1 : +1;
|
|
y_mult = font->y_scale < 0 ? -1 : +1;
|
|
}
|
|
|
|
if (unlikely (FT_Load_Glyph (ft_face, glyph, ft_font->load_flags)))
|
|
return false;
|
|
|
|
extents->x_bearing = (hb_position_t) (x_mult * ft_face->glyph->metrics.horiBearingX);
|
|
extents->y_bearing = (hb_position_t) (y_mult * ft_face->glyph->metrics.horiBearingY);
|
|
extents->width = (hb_position_t) (x_mult * ft_face->glyph->metrics.width);
|
|
extents->height = (hb_position_t) (y_mult * -ft_face->glyph->metrics.height);
|
|
|
|
return true;
|
|
}
|
|
|
|
static hb_bool_t
|
|
hb_ft_get_glyph_contour_point (hb_font_t *font HB_UNUSED,
|
|
void *font_data,
|
|
hb_codepoint_t glyph,
|
|
unsigned int point_index,
|
|
hb_position_t *x,
|
|
hb_position_t *y,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
|
|
if (unlikely (FT_Load_Glyph (ft_face, glyph, ft_font->load_flags)))
|
|
return false;
|
|
|
|
if (unlikely (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE))
|
|
return false;
|
|
|
|
if (unlikely (point_index >= (unsigned int) ft_face->glyph->outline.n_points))
|
|
return false;
|
|
|
|
*x = ft_face->glyph->outline.points[point_index].x;
|
|
*y = ft_face->glyph->outline.points[point_index].y;
|
|
|
|
return true;
|
|
}
|
|
|
|
static hb_bool_t
|
|
hb_ft_get_glyph_name (hb_font_t *font HB_UNUSED,
|
|
void *font_data,
|
|
hb_codepoint_t glyph,
|
|
char *name, unsigned int size,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
|
|
hb_bool_t ret = !FT_Get_Glyph_Name (ft_face, glyph, name, size);
|
|
if (ret && (size && !*name))
|
|
ret = false;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static hb_bool_t
|
|
hb_ft_get_glyph_from_name (hb_font_t *font HB_UNUSED,
|
|
void *font_data,
|
|
const char *name, int len, /* -1 means nul-terminated */
|
|
hb_codepoint_t *glyph,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
|
|
if (len < 0)
|
|
*glyph = FT_Get_Name_Index (ft_face, (FT_String *) name);
|
|
else {
|
|
/* Make a nul-terminated version. */
|
|
char buf[128];
|
|
len = hb_min (len, (int) sizeof (buf) - 1);
|
|
strncpy (buf, name, len);
|
|
buf[len] = '\0';
|
|
*glyph = FT_Get_Name_Index (ft_face, buf);
|
|
}
|
|
|
|
if (*glyph == 0)
|
|
{
|
|
/* Check whether the given name was actually the name of glyph 0. */
|
|
char buf[128];
|
|
if (!FT_Get_Glyph_Name(ft_face, 0, buf, sizeof (buf)) &&
|
|
len < 0 ? !strcmp (buf, name) : !strncmp (buf, name, len))
|
|
return true;
|
|
}
|
|
|
|
return *glyph != 0;
|
|
}
|
|
|
|
static hb_bool_t
|
|
hb_ft_get_font_h_extents (hb_font_t *font HB_UNUSED,
|
|
void *font_data,
|
|
hb_font_extents_t *metrics,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
float y_mult;
|
|
#ifdef HAVE_FT_GET_TRANSFORM
|
|
if (ft_font->transform)
|
|
{
|
|
FT_Matrix matrix;
|
|
FT_Get_Transform (ft_face, &matrix, nullptr);
|
|
y_mult = sqrtf ((float)matrix.yx * matrix.yx + (float)matrix.yy * matrix.yy) / 65536.f;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
y_mult = font->y_scale < 0 ? -1 : +1;
|
|
}
|
|
|
|
if (ft_face->units_per_EM != 0)
|
|
{
|
|
metrics->ascender = FT_MulFix(ft_face->ascender, ft_face->size->metrics.y_scale);
|
|
metrics->descender = FT_MulFix(ft_face->descender, ft_face->size->metrics.y_scale);
|
|
metrics->line_gap = FT_MulFix( ft_face->height, ft_face->size->metrics.y_scale ) - (metrics->ascender - metrics->descender);
|
|
}
|
|
else
|
|
{
|
|
/* Bitmap-only font, eg. color bitmap font. */
|
|
metrics->ascender = ft_face->size->metrics.ascender;
|
|
metrics->descender = ft_face->size->metrics.descender;
|
|
metrics->line_gap = ft_face->size->metrics.height - (metrics->ascender - metrics->descender);
|
|
}
|
|
|
|
metrics->ascender = (hb_position_t) (y_mult * metrics->ascender);
|
|
metrics->descender = (hb_position_t) (y_mult * metrics->descender);
|
|
metrics->line_gap = (hb_position_t) (y_mult * metrics->line_gap);
|
|
|
|
return true;
|
|
}
|
|
|
|
#ifndef HB_NO_DRAW
|
|
|
|
static int
|
|
_hb_ft_move_to (const FT_Vector *to,
|
|
hb_draw_session_t *drawing)
|
|
{
|
|
drawing->move_to (to->x, to->y);
|
|
return FT_Err_Ok;
|
|
}
|
|
|
|
static int
|
|
_hb_ft_line_to (const FT_Vector *to,
|
|
hb_draw_session_t *drawing)
|
|
{
|
|
drawing->line_to (to->x, to->y);
|
|
return FT_Err_Ok;
|
|
}
|
|
|
|
static int
|
|
_hb_ft_conic_to (const FT_Vector *control,
|
|
const FT_Vector *to,
|
|
hb_draw_session_t *drawing)
|
|
{
|
|
drawing->quadratic_to (control->x, control->y,
|
|
to->x, to->y);
|
|
return FT_Err_Ok;
|
|
}
|
|
|
|
static int
|
|
_hb_ft_cubic_to (const FT_Vector *control1,
|
|
const FT_Vector *control2,
|
|
const FT_Vector *to,
|
|
hb_draw_session_t *drawing)
|
|
{
|
|
drawing->cubic_to (control1->x, control1->y,
|
|
control2->x, control2->y,
|
|
to->x, to->y);
|
|
return FT_Err_Ok;
|
|
}
|
|
|
|
static void
|
|
hb_ft_get_glyph_shape (hb_font_t *font HB_UNUSED,
|
|
void *font_data,
|
|
hb_codepoint_t glyph,
|
|
hb_draw_funcs_t *draw_funcs, void *draw_data,
|
|
void *user_data HB_UNUSED)
|
|
{
|
|
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
|
|
hb_lock_t lock (ft_font->lock);
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
|
|
if (unlikely (FT_Load_Glyph (ft_face, glyph,
|
|
FT_LOAD_NO_BITMAP | ft_font->load_flags)))
|
|
return;
|
|
|
|
if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
|
|
return;
|
|
|
|
const FT_Outline_Funcs outline_funcs = {
|
|
(FT_Outline_MoveToFunc) _hb_ft_move_to,
|
|
(FT_Outline_LineToFunc) _hb_ft_line_to,
|
|
(FT_Outline_ConicToFunc) _hb_ft_conic_to,
|
|
(FT_Outline_CubicToFunc) _hb_ft_cubic_to,
|
|
0, /* shift */
|
|
0, /* delta */
|
|
};
|
|
|
|
hb_draw_session_t draw_session (draw_funcs, draw_data, font->slant_xy);
|
|
|
|
FT_Outline_Decompose (&ft_face->glyph->outline,
|
|
&outline_funcs,
|
|
&draw_session);
|
|
}
|
|
#endif
|
|
|
|
|
|
static inline void free_static_ft_funcs ();
|
|
|
|
static struct hb_ft_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ft_font_funcs_lazy_loader_t>
|
|
{
|
|
static hb_font_funcs_t *create ()
|
|
{
|
|
hb_font_funcs_t *funcs = hb_font_funcs_create ();
|
|
|
|
hb_font_funcs_set_nominal_glyph_func (funcs, hb_ft_get_nominal_glyph, nullptr, nullptr);
|
|
hb_font_funcs_set_nominal_glyphs_func (funcs, hb_ft_get_nominal_glyphs, nullptr, nullptr);
|
|
hb_font_funcs_set_variation_glyph_func (funcs, hb_ft_get_variation_glyph, nullptr, nullptr);
|
|
|
|
hb_font_funcs_set_font_h_extents_func (funcs, hb_ft_get_font_h_extents, nullptr, nullptr);
|
|
hb_font_funcs_set_glyph_h_advances_func (funcs, hb_ft_get_glyph_h_advances, nullptr, nullptr);
|
|
//hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ft_get_glyph_h_origin, nullptr, nullptr);
|
|
|
|
#ifndef HB_NO_VERTICAL
|
|
//hb_font_funcs_set_font_v_extents_func (funcs, hb_ft_get_font_v_extents, nullptr, nullptr);
|
|
hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ft_get_glyph_v_advance, nullptr, nullptr);
|
|
hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ft_get_glyph_v_origin, nullptr, nullptr);
|
|
#endif
|
|
|
|
#ifndef HB_NO_OT_SHAPE_FALLBACK
|
|
hb_font_funcs_set_glyph_h_kerning_func (funcs, hb_ft_get_glyph_h_kerning, nullptr, nullptr);
|
|
#endif
|
|
//hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_ft_get_glyph_v_kerning, nullptr, nullptr);
|
|
hb_font_funcs_set_glyph_extents_func (funcs, hb_ft_get_glyph_extents, nullptr, nullptr);
|
|
hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ft_get_glyph_contour_point, nullptr, nullptr);
|
|
hb_font_funcs_set_glyph_name_func (funcs, hb_ft_get_glyph_name, nullptr, nullptr);
|
|
hb_font_funcs_set_glyph_from_name_func (funcs, hb_ft_get_glyph_from_name, nullptr, nullptr);
|
|
|
|
#ifndef HB_NO_DRAW
|
|
hb_font_funcs_set_glyph_shape_func (funcs, hb_ft_get_glyph_shape, nullptr, nullptr);
|
|
#endif
|
|
|
|
hb_font_funcs_make_immutable (funcs);
|
|
|
|
hb_atexit (free_static_ft_funcs);
|
|
|
|
return funcs;
|
|
}
|
|
} static_ft_funcs;
|
|
|
|
static inline
|
|
void free_static_ft_funcs ()
|
|
{
|
|
static_ft_funcs.free_instance ();
|
|
}
|
|
|
|
static hb_font_funcs_t *
|
|
_hb_ft_get_font_funcs ()
|
|
{
|
|
return static_ft_funcs.get_unconst ();
|
|
}
|
|
|
|
static void
|
|
_hb_ft_font_set_funcs (hb_font_t *font, FT_Face ft_face, bool unref)
|
|
{
|
|
bool symbol = ft_face->charmap && ft_face->charmap->encoding == FT_ENCODING_MS_SYMBOL;
|
|
|
|
hb_ft_font_t *ft_font = _hb_ft_font_create (ft_face, symbol, unref);
|
|
if (unlikely (!ft_font)) return;
|
|
|
|
hb_font_set_funcs (font,
|
|
_hb_ft_get_font_funcs (),
|
|
ft_font,
|
|
_hb_ft_font_destroy);
|
|
}
|
|
|
|
|
|
static hb_blob_t *
|
|
_hb_ft_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
|
|
{
|
|
FT_Face ft_face = (FT_Face) user_data;
|
|
FT_Byte *buffer;
|
|
FT_ULong length = 0;
|
|
FT_Error error;
|
|
|
|
/* Note: FreeType like HarfBuzz uses the NONE tag for fetching the entire blob */
|
|
|
|
error = FT_Load_Sfnt_Table (ft_face, tag, 0, nullptr, &length);
|
|
if (error)
|
|
return nullptr;
|
|
|
|
buffer = (FT_Byte *) hb_malloc (length);
|
|
if (!buffer)
|
|
return nullptr;
|
|
|
|
error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length);
|
|
if (error)
|
|
{
|
|
hb_free (buffer);
|
|
return nullptr;
|
|
}
|
|
|
|
return hb_blob_create ((const char *) buffer, length,
|
|
HB_MEMORY_MODE_WRITABLE,
|
|
buffer, hb_free);
|
|
}
|
|
|
|
/**
|
|
* hb_ft_face_create:
|
|
* @ft_face: (destroy destroy) (scope notified): FT_Face to work upon
|
|
* @destroy: (nullable): A callback to call when the face object is not needed anymore
|
|
*
|
|
* Creates an #hb_face_t face object from the specified FT_Face.
|
|
*
|
|
* This variant of the function does not provide any life-cycle management.
|
|
*
|
|
* Most client programs should use hb_ft_face_create_referenced()
|
|
* (or, perhaps, hb_ft_face_create_cached()) instead.
|
|
*
|
|
* If you know you have valid reasons not to use hb_ft_face_create_referenced(),
|
|
* then it is the client program's responsibility to destroy @ft_face
|
|
* after the #hb_face_t face object has been destroyed.
|
|
*
|
|
* Return value: (transfer full): the new #hb_face_t face object
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_face_t *
|
|
hb_ft_face_create (FT_Face ft_face,
|
|
hb_destroy_func_t destroy)
|
|
{
|
|
hb_face_t *face;
|
|
|
|
if (!ft_face->stream->read) {
|
|
hb_blob_t *blob;
|
|
|
|
blob = hb_blob_create ((const char *) ft_face->stream->base,
|
|
(unsigned int) ft_face->stream->size,
|
|
HB_MEMORY_MODE_READONLY,
|
|
ft_face, destroy);
|
|
face = hb_face_create (blob, ft_face->face_index);
|
|
hb_blob_destroy (blob);
|
|
} else {
|
|
face = hb_face_create_for_tables (_hb_ft_reference_table, ft_face, destroy);
|
|
}
|
|
|
|
hb_face_set_index (face, ft_face->face_index);
|
|
hb_face_set_upem (face, ft_face->units_per_EM);
|
|
|
|
return face;
|
|
}
|
|
|
|
/**
|
|
* hb_ft_face_create_referenced:
|
|
* @ft_face: FT_Face to work upon
|
|
*
|
|
* Creates an #hb_face_t face object from the specified FT_Face.
|
|
*
|
|
* This is the preferred variant of the hb_ft_face_create*
|
|
* function family, because it calls FT_Reference_Face() on @ft_face,
|
|
* ensuring that @ft_face remains alive as long as the resulting
|
|
* #hb_face_t face object remains alive. Also calls FT_Done_Face()
|
|
* when the #hb_face_t face object is destroyed.
|
|
*
|
|
* Use this version unless you know you have good reasons not to.
|
|
*
|
|
* Return value: (transfer full): the new #hb_face_t face object
|
|
*
|
|
* Since: 0.9.38
|
|
**/
|
|
hb_face_t *
|
|
hb_ft_face_create_referenced (FT_Face ft_face)
|
|
{
|
|
FT_Reference_Face (ft_face);
|
|
return hb_ft_face_create (ft_face, _hb_ft_face_destroy);
|
|
}
|
|
|
|
static void
|
|
hb_ft_face_finalize (FT_Face ft_face)
|
|
{
|
|
hb_face_destroy ((hb_face_t *) ft_face->generic.data);
|
|
}
|
|
|
|
/**
|
|
* hb_ft_face_create_cached:
|
|
* @ft_face: FT_Face to work upon
|
|
*
|
|
* Creates an #hb_face_t face object from the specified FT_Face.
|
|
*
|
|
* This variant of the function caches the newly created #hb_face_t
|
|
* face object, using the @generic pointer of @ft_face. Subsequent function
|
|
* calls that are passed the same @ft_face parameter will have the same
|
|
* #hb_face_t returned to them, and that #hb_face_t will be correctly
|
|
* reference counted.
|
|
*
|
|
* However, client programs are still responsible for destroying
|
|
* @ft_face after the last #hb_face_t face object has been destroyed.
|
|
*
|
|
* Return value: (transfer full): the new #hb_face_t face object
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_face_t *
|
|
hb_ft_face_create_cached (FT_Face ft_face)
|
|
{
|
|
if (unlikely (!ft_face->generic.data || ft_face->generic.finalizer != (FT_Generic_Finalizer) hb_ft_face_finalize))
|
|
{
|
|
if (ft_face->generic.finalizer)
|
|
ft_face->generic.finalizer (ft_face);
|
|
|
|
ft_face->generic.data = hb_ft_face_create (ft_face, nullptr);
|
|
ft_face->generic.finalizer = (FT_Generic_Finalizer) hb_ft_face_finalize;
|
|
}
|
|
|
|
return hb_face_reference ((hb_face_t *) ft_face->generic.data);
|
|
}
|
|
|
|
/**
|
|
* hb_ft_font_create:
|
|
* @ft_face: (destroy destroy) (scope notified): FT_Face to work upon
|
|
* @destroy: (nullable): A callback to call when the font object is not needed anymore
|
|
*
|
|
* Creates an #hb_font_t font object from the specified FT_Face.
|
|
*
|
|
* <note>Note: You must set the face size on @ft_face before calling
|
|
* hb_ft_font_create() on it. HarfBuzz assumes size is always set and will
|
|
* access `size` member of FT_Face unconditionally.</note>
|
|
*
|
|
* This variant of the function does not provide any life-cycle management.
|
|
*
|
|
* Most client programs should use hb_ft_font_create_referenced()
|
|
* instead.
|
|
*
|
|
* If you know you have valid reasons not to use hb_ft_font_create_referenced(),
|
|
* then it is the client program's responsibility to destroy @ft_face
|
|
* after the #hb_font_t font object has been destroyed.
|
|
*
|
|
* HarfBuzz will use the @destroy callback on the #hb_font_t font object
|
|
* if it is supplied when you use this function. However, even if @destroy
|
|
* is provided, it is the client program's responsibility to destroy @ft_face,
|
|
* and it is the client program's responsibility to ensure that @ft_face is
|
|
* destroyed only after the #hb_font_t font object has been destroyed.
|
|
*
|
|
* Return value: (transfer full): the new #hb_font_t font object
|
|
*
|
|
* Since: 0.9.2
|
|
**/
|
|
hb_font_t *
|
|
hb_ft_font_create (FT_Face ft_face,
|
|
hb_destroy_func_t destroy)
|
|
{
|
|
hb_font_t *font;
|
|
hb_face_t *face;
|
|
|
|
face = hb_ft_face_create (ft_face, destroy);
|
|
font = hb_font_create (face);
|
|
hb_face_destroy (face);
|
|
_hb_ft_font_set_funcs (font, ft_face, false);
|
|
hb_ft_font_changed (font);
|
|
return font;
|
|
}
|
|
|
|
/**
|
|
* hb_ft_font_changed:
|
|
* @font: #hb_font_t to work upon
|
|
*
|
|
* Refreshes the state of @font when the underlying FT_Face has changed.
|
|
* This function should be called after changing the size or
|
|
* variation-axis settings on the FT_Face.
|
|
*
|
|
* Since: 1.0.5
|
|
**/
|
|
void
|
|
hb_ft_font_changed (hb_font_t *font)
|
|
{
|
|
if (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy)
|
|
return;
|
|
|
|
hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
|
|
|
|
FT_Face ft_face = ft_font->ft_face;
|
|
|
|
hb_font_set_scale (font,
|
|
(int) (((uint64_t) ft_face->size->metrics.x_scale * (uint64_t) ft_face->units_per_EM + (1u<<15)) >> 16),
|
|
(int) (((uint64_t) ft_face->size->metrics.y_scale * (uint64_t) ft_face->units_per_EM + (1u<<15)) >> 16));
|
|
#if 0 /* hb-ft works in no-hinting model */
|
|
hb_font_set_ppem (font,
|
|
ft_face->size->metrics.x_ppem,
|
|
ft_face->size->metrics.y_ppem);
|
|
#endif
|
|
|
|
#if defined(HAVE_FT_GET_VAR_BLEND_COORDINATES) && !defined(HB_NO_VAR)
|
|
FT_MM_Var *mm_var = nullptr;
|
|
if (!FT_Get_MM_Var (ft_face, &mm_var))
|
|
{
|
|
FT_Fixed *ft_coords = (FT_Fixed *) hb_calloc (mm_var->num_axis, sizeof (FT_Fixed));
|
|
int *coords = (int *) hb_calloc (mm_var->num_axis, sizeof (int));
|
|
if (coords && ft_coords)
|
|
{
|
|
if (!FT_Get_Var_Blend_Coordinates (ft_face, mm_var->num_axis, ft_coords))
|
|
{
|
|
bool nonzero = false;
|
|
|
|
for (unsigned int i = 0; i < mm_var->num_axis; ++i)
|
|
{
|
|
coords[i] = ft_coords[i] >>= 2;
|
|
nonzero = nonzero || coords[i];
|
|
}
|
|
|
|
if (nonzero)
|
|
hb_font_set_var_coords_normalized (font, coords, mm_var->num_axis);
|
|
else
|
|
hb_font_set_var_coords_normalized (font, nullptr, 0);
|
|
}
|
|
}
|
|
hb_free (coords);
|
|
hb_free (ft_coords);
|
|
#ifdef HAVE_FT_DONE_MM_VAR
|
|
FT_Done_MM_Var (ft_face->glyph->library, mm_var);
|
|
#else
|
|
hb_free (mm_var);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
ft_font->advance_cache.clear ();
|
|
ft_font->cached_serial = font->serial;
|
|
}
|
|
|
|
/**
|
|
* hb_ft_hb_font_changed:
|
|
* @font: #hb_font_t to work upon
|
|
*
|
|
* Refreshes the state of the underlying FT_Face of @font when the hb_font_t
|
|
* @font has changed.
|
|
* This function should be called after changing the size or
|
|
* variation-axis settings on the @font.
|
|
* This call is fast if nothing has changed on @font.
|
|
*
|
|
* Return value: true if changed, false otherwise
|
|
*
|
|
* Since: 4.4.0
|
|
**/
|
|
hb_bool_t
|
|
hb_ft_hb_font_changed (hb_font_t *font)
|
|
{
|
|
if (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy)
|
|
return false;
|
|
|
|
hb_ft_font_t *ft_font = (hb_ft_font_t *) font->user_data;
|
|
|
|
return _hb_ft_hb_font_check_changed (font, ft_font);
|
|
}
|
|
|
|
/**
|
|
* hb_ft_font_create_referenced:
|
|
* @ft_face: FT_Face to work upon
|
|
*
|
|
* Creates an #hb_font_t font object from the specified FT_Face.
|
|
*
|
|
* <note>Note: You must set the face size on @ft_face before calling
|
|
* hb_ft_font_create_referenced() on it. HarfBuzz assumes size is always set
|
|
* and will access `size` member of FT_Face unconditionally.</note>
|
|
*
|
|
* This is the preferred variant of the hb_ft_font_create*
|
|
* function family, because it calls FT_Reference_Face() on @ft_face,
|
|
* ensuring that @ft_face remains alive as long as the resulting
|
|
* #hb_font_t font object remains alive.
|
|
*
|
|
* Use this version unless you know you have good reasons not to.
|
|
*
|
|
* Return value: (transfer full): the new #hb_font_t font object
|
|
*
|
|
* Since: 0.9.38
|
|
**/
|
|
hb_font_t *
|
|
hb_ft_font_create_referenced (FT_Face ft_face)
|
|
{
|
|
FT_Reference_Face (ft_face);
|
|
return hb_ft_font_create (ft_face, _hb_ft_face_destroy);
|
|
}
|
|
|
|
static inline void free_static_ft_library ();
|
|
|
|
static struct hb_ft_library_lazy_loader_t : hb_lazy_loader_t<hb_remove_pointer<FT_Library>,
|
|
hb_ft_library_lazy_loader_t>
|
|
{
|
|
static FT_Library create ()
|
|
{
|
|
FT_Library l;
|
|
if (FT_Init_FreeType (&l))
|
|
return nullptr;
|
|
|
|
hb_atexit (free_static_ft_library);
|
|
|
|
return l;
|
|
}
|
|
static void destroy (FT_Library l)
|
|
{
|
|
FT_Done_FreeType (l);
|
|
}
|
|
static FT_Library get_null ()
|
|
{
|
|
return nullptr;
|
|
}
|
|
} static_ft_library;
|
|
|
|
static inline
|
|
void free_static_ft_library ()
|
|
{
|
|
static_ft_library.free_instance ();
|
|
}
|
|
|
|
static FT_Library
|
|
get_ft_library ()
|
|
{
|
|
return static_ft_library.get_unconst ();
|
|
}
|
|
|
|
static void
|
|
_release_blob (FT_Face ft_face)
|
|
{
|
|
hb_blob_destroy ((hb_blob_t *) ft_face->generic.data);
|
|
}
|
|
|
|
/**
|
|
* hb_ft_font_set_funcs:
|
|
* @font: #hb_font_t to work upon
|
|
*
|
|
* Configures the font-functions structure of the specified
|
|
* #hb_font_t font object to use FreeType font functions.
|
|
*
|
|
* In particular, you can use this function to configure an
|
|
* existing #hb_face_t face object for use with FreeType font
|
|
* functions even if that #hb_face_t face object was initially
|
|
* created with hb_face_create(), and therefore was not
|
|
* initially configured to use FreeType font functions.
|
|
*
|
|
* An #hb_face_t face object created with hb_ft_face_create()
|
|
* is preconfigured for FreeType font functions and does not
|
|
* require this function to be used.
|
|
*
|
|
* <note>Note: Internally, this function creates an FT_Face.
|
|
* </note>
|
|
*
|
|
* Since: 1.0.5
|
|
**/
|
|
void
|
|
hb_ft_font_set_funcs (hb_font_t *font)
|
|
{
|
|
hb_blob_t *blob = hb_face_reference_blob (font->face);
|
|
unsigned int blob_length;
|
|
const char *blob_data = hb_blob_get_data (blob, &blob_length);
|
|
if (unlikely (!blob_length))
|
|
DEBUG_MSG (FT, font, "Font face has empty blob");
|
|
|
|
FT_Face ft_face = nullptr;
|
|
FT_Error err = FT_New_Memory_Face (get_ft_library (),
|
|
(const FT_Byte *) blob_data,
|
|
blob_length,
|
|
hb_face_get_index (font->face),
|
|
&ft_face);
|
|
|
|
if (unlikely (err)) {
|
|
hb_blob_destroy (blob);
|
|
DEBUG_MSG (FT, font, "Font face FT_New_Memory_Face() failed");
|
|
return;
|
|
}
|
|
|
|
if (FT_Select_Charmap (ft_face, FT_ENCODING_MS_SYMBOL))
|
|
FT_Select_Charmap (ft_face, FT_ENCODING_UNICODE);
|
|
|
|
|
|
ft_face->generic.data = blob;
|
|
ft_face->generic.finalizer = (FT_Generic_Finalizer) _release_blob;
|
|
|
|
_hb_ft_font_set_funcs (font, ft_face, true);
|
|
hb_ft_font_set_load_flags (font, FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING);
|
|
|
|
_hb_ft_hb_font_changed (font, ft_face);
|
|
}
|
|
|
|
|
|
#endif
|