964 lines
22 KiB
C++
964 lines
22 KiB
C++
/*
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* Copyright © 2009 Red Hat, 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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*/
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#include "hb-private.hh"
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#include "hb-ot-layout-private.hh"
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#include "hb-font-private.hh"
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#include "hb-blob.h"
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#include "hb-open-file-private.hh"
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#include "hb-ot-head-table.hh"
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#include <string.h>
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/*
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* hb_font_funcs_t
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*/
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static hb_bool_t
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hb_font_get_glyph_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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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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if (font->parent)
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return hb_font_get_glyph (font->parent, unicode, variation_selector, glyph);
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*glyph = 0;
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return FALSE;
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}
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static hb_position_t
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hb_font_get_glyph_h_advance_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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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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if (font->parent)
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return font->parent_scale_x_distance (hb_font_get_glyph_h_advance (font->parent, glyph));
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return font->x_scale;
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}
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static hb_position_t
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hb_font_get_glyph_v_advance_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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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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if (font->parent)
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return font->parent_scale_y_distance (hb_font_get_glyph_v_advance (font->parent, glyph));
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return font->y_scale;
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}
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static hb_bool_t
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hb_font_get_glyph_h_origin_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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hb_codepoint_t glyph,
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hb_position_t *x,
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hb_position_t *y,
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void *user_data HB_UNUSED)
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{
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if (font->parent) {
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hb_bool_t ret = hb_font_get_glyph_h_origin (font->parent,
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glyph,
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x, y);
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if (ret)
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font->parent_scale_position (x, y);
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return ret;
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}
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*x = *y = 0;
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return FALSE;
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}
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static hb_bool_t
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hb_font_get_glyph_v_origin_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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hb_codepoint_t glyph,
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hb_position_t *x,
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hb_position_t *y,
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void *user_data HB_UNUSED)
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{
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if (font->parent) {
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hb_bool_t ret = hb_font_get_glyph_v_origin (font->parent,
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glyph,
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x, y);
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if (ret)
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font->parent_scale_position (x, y);
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return ret;
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}
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*x = *y = 0;
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return FALSE;
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}
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static hb_position_t
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hb_font_get_glyph_h_kerning_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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hb_codepoint_t left_glyph,
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hb_codepoint_t right_glyph,
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void *user_data HB_UNUSED)
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{
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if (font->parent)
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return font->parent_scale_x_distance (hb_font_get_glyph_h_kerning (font->parent, left_glyph, right_glyph));
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return 0;
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}
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static hb_position_t
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hb_font_get_glyph_v_kerning_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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hb_codepoint_t top_glyph,
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hb_codepoint_t bottom_glyph,
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void *user_data HB_UNUSED)
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{
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if (font->parent)
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return font->parent_scale_y_distance (hb_font_get_glyph_v_kerning (font->parent, top_glyph, bottom_glyph));
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return 0;
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}
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static hb_bool_t
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hb_font_get_glyph_extents_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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hb_codepoint_t glyph,
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hb_glyph_extents_t *extents,
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void *user_data HB_UNUSED)
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{
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if (font->parent) {
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hb_bool_t ret = hb_font_get_glyph_extents (font->parent,
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glyph,
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extents);
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if (ret) {
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font->parent_scale_position (&extents->x_bearing, &extents->y_bearing);
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font->parent_scale_distance (&extents->width, &extents->height);
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}
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return ret;
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}
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memset (extents, 0, sizeof (*extents));
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return FALSE;
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}
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static hb_bool_t
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hb_font_get_glyph_contour_point_nil (hb_font_t *font HB_UNUSED,
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void *font_data HB_UNUSED,
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hb_codepoint_t glyph,
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unsigned int point_index,
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hb_position_t *x,
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hb_position_t *y,
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void *user_data HB_UNUSED)
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{
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if (font->parent) {
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hb_bool_t ret = hb_font_get_glyph_contour_point (font->parent,
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glyph, point_index,
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x, y);
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if (ret)
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font->parent_scale_position (x, y);
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return ret;
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}
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*x = *y = 0;
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return FALSE;
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}
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static hb_font_funcs_t _hb_font_funcs_nil = {
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HB_OBJECT_HEADER_STATIC,
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TRUE, /* immutable */
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{
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#define HB_FONT_FUNC_IMPLEMENT(name) hb_font_get_##name##_nil,
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HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_FONT_FUNC_IMPLEMENT
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}
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};
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hb_font_funcs_t *
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hb_font_funcs_create (void)
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{
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hb_font_funcs_t *ffuncs;
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if (!(ffuncs = hb_object_create<hb_font_funcs_t> ()))
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return &_hb_font_funcs_nil;
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ffuncs->get = _hb_font_funcs_nil.get;
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return ffuncs;
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}
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hb_font_funcs_t *
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hb_font_funcs_get_empty (void)
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{
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return &_hb_font_funcs_nil;
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}
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hb_font_funcs_t *
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hb_font_funcs_reference (hb_font_funcs_t *ffuncs)
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{
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return hb_object_reference (ffuncs);
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}
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void
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hb_font_funcs_destroy (hb_font_funcs_t *ffuncs)
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{
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if (!hb_object_destroy (ffuncs)) return;
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#define HB_FONT_FUNC_IMPLEMENT(name) if (ffuncs->destroy.name) \
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ffuncs->destroy.name (ffuncs->user_data.name);
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HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_FONT_FUNC_IMPLEMENT
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free (ffuncs);
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}
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hb_bool_t
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hb_font_funcs_set_user_data (hb_font_funcs_t *ffuncs,
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hb_user_data_key_t *key,
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void * data,
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hb_destroy_func_t destroy,
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hb_bool_t replace)
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{
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return hb_object_set_user_data (ffuncs, key, data, destroy, replace);
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}
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void *
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hb_font_funcs_get_user_data (hb_font_funcs_t *ffuncs,
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hb_user_data_key_t *key)
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{
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return hb_object_get_user_data (ffuncs, key);
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}
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void
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hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs)
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{
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if (hb_object_is_inert (ffuncs))
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return;
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ffuncs->immutable = TRUE;
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}
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hb_bool_t
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hb_font_funcs_is_immutable (hb_font_funcs_t *ffuncs)
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{
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return ffuncs->immutable;
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}
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#define HB_FONT_FUNC_IMPLEMENT(name) \
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\
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void \
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hb_font_funcs_set_##name##_func (hb_font_funcs_t *ffuncs, \
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hb_font_get_##name##_func_t func, \
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void *user_data, \
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hb_destroy_func_t destroy) \
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{ \
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if (ffuncs->immutable) \
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return; \
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\
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if (ffuncs->destroy.name) \
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ffuncs->destroy.name (ffuncs->user_data.name); \
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\
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if (func) { \
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ffuncs->get.name = func; \
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ffuncs->user_data.name = user_data; \
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ffuncs->destroy.name = destroy; \
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} else { \
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ffuncs->get.name = hb_font_get_##name##_nil; \
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ffuncs->user_data.name = NULL; \
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ffuncs->destroy.name = NULL; \
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} \
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}
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HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
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#undef HB_FONT_FUNC_IMPLEMENT
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hb_bool_t
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hb_font_get_glyph (hb_font_t *font,
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hb_codepoint_t unicode, hb_codepoint_t variation_selector,
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hb_codepoint_t *glyph)
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{
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*glyph = 0;
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return font->klass->get.glyph (font, font->user_data,
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unicode, variation_selector, glyph,
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font->klass->user_data.glyph);
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}
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hb_position_t
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hb_font_get_glyph_h_advance (hb_font_t *font,
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hb_codepoint_t glyph)
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{
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return font->klass->get.glyph_h_advance (font, font->user_data,
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glyph,
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font->klass->user_data.glyph_h_advance);
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}
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hb_position_t
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hb_font_get_glyph_v_advance (hb_font_t *font,
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hb_codepoint_t glyph)
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{
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return font->klass->get.glyph_v_advance (font, font->user_data,
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glyph,
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font->klass->user_data.glyph_v_advance);
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}
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hb_bool_t
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hb_font_get_glyph_h_origin (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y)
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{
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*x = *y = 0;
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return font->klass->get.glyph_h_origin (font, font->user_data,
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glyph, x, y,
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font->klass->user_data.glyph_h_origin);
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}
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hb_bool_t
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hb_font_get_glyph_v_origin (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y)
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{
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*x = *y = 0;
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return font->klass->get.glyph_v_origin (font, font->user_data,
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glyph, x, y,
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font->klass->user_data.glyph_v_origin);
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}
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hb_position_t
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hb_font_get_glyph_h_kerning (hb_font_t *font,
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hb_codepoint_t left_glyph, hb_codepoint_t right_glyph)
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{
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return font->klass->get.glyph_h_kerning (font, font->user_data,
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left_glyph, right_glyph,
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font->klass->user_data.glyph_h_kerning);
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}
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hb_position_t
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hb_font_get_glyph_v_kerning (hb_font_t *font,
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hb_codepoint_t left_glyph, hb_codepoint_t right_glyph)
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{
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return font->klass->get.glyph_v_kerning (font, font->user_data,
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left_glyph, right_glyph,
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font->klass->user_data.glyph_v_kerning);
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}
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hb_bool_t
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hb_font_get_glyph_extents (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_glyph_extents_t *extents)
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{
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memset (extents, 0, sizeof (*extents));
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return font->klass->get.glyph_extents (font, font->user_data,
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glyph,
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extents,
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font->klass->user_data.glyph_extents);
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}
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hb_bool_t
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hb_font_get_glyph_contour_point (hb_font_t *font,
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hb_codepoint_t glyph, unsigned int point_index,
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hb_position_t *x, hb_position_t *y)
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{
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*x = *y = 0;
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return font->klass->get.glyph_contour_point (font, font->user_data,
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glyph, point_index,
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x, y,
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font->klass->user_data.glyph_contour_point);
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}
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/* A bit higher-level, and with fallback */
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void
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hb_font_get_glyph_advance_for_direction (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_direction_t direction,
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hb_position_t *x, hb_position_t *y)
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{
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if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
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*x = hb_font_get_glyph_h_advance (font, glyph);
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*y = 0;
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} else {
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*x = 0;
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*y = hb_font_get_glyph_v_advance (font, glyph);
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}
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}
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static void
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guess_v_origin_minus_h_origin (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y)
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{
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*x = hb_font_get_glyph_h_advance (font, glyph) / 2;
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/* TODO use font_metics.ascent */
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*y = font->y_scale;
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}
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void
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hb_font_get_glyph_origin_for_direction (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_direction_t direction,
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hb_position_t *x, hb_position_t *y)
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{
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if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
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hb_bool_t ret = hb_font_get_glyph_h_origin (font, glyph, x, y);
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if (!ret && (ret = hb_font_get_glyph_v_origin (font, glyph, x, y))) {
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hb_position_t dx, dy;
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guess_v_origin_minus_h_origin (font, glyph, &dx, &dy);
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*x -= dx; *y -= dy;
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}
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} else {
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hb_bool_t ret = hb_font_get_glyph_v_origin (font, glyph, x, y);
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if (!ret && (ret = hb_font_get_glyph_h_origin (font, glyph, x, y))) {
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hb_position_t dx, dy;
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guess_v_origin_minus_h_origin (font, glyph, &dx, &dy);
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*x += dx; *y += dy;
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}
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}
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}
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void
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hb_font_add_glyph_origin_for_direction (hb_font_t *font,
|
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hb_codepoint_t glyph,
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hb_direction_t direction,
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hb_position_t *x, hb_position_t *y)
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{
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hb_position_t origin_x, origin_y;
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hb_font_get_glyph_origin_for_direction (font, glyph, direction, &origin_x, &origin_y);
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*x += origin_x;
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*y += origin_y;
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}
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void
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hb_font_subtract_glyph_origin_for_direction (hb_font_t *font,
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hb_codepoint_t glyph,
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hb_direction_t direction,
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hb_position_t *x, hb_position_t *y)
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{
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hb_position_t origin_x, origin_y;
|
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hb_font_get_glyph_origin_for_direction (font, glyph, direction, &origin_x, &origin_y);
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*x -= origin_x;
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*y -= origin_y;
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}
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void
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hb_font_get_glyph_kerning_for_direction (hb_font_t *font,
|
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hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
|
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hb_direction_t direction,
|
|
hb_position_t *x, hb_position_t *y)
|
|
{
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if (likely (HB_DIRECTION_IS_HORIZONTAL (direction))) {
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*x = hb_font_get_glyph_h_kerning (font, first_glyph, second_glyph);
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*y = 0;
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} else {
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*x = 0;
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*y = hb_font_get_glyph_v_kerning (font, first_glyph, second_glyph);
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}
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}
|
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|
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hb_bool_t
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hb_font_get_glyph_extents_for_origin (hb_font_t *font,
|
|
hb_codepoint_t glyph,
|
|
hb_direction_t direction,
|
|
hb_glyph_extents_t *extents)
|
|
{
|
|
hb_bool_t ret = hb_font_get_glyph_extents (font, glyph, extents);
|
|
|
|
if (ret)
|
|
hb_font_subtract_glyph_origin_for_direction (font, glyph, direction, &extents->x_bearing, &extents->y_bearing);
|
|
|
|
return ret;
|
|
}
|
|
|
|
hb_bool_t
|
|
hb_font_get_glyph_contour_point_for_origin (hb_font_t *font,
|
|
hb_codepoint_t glyph, unsigned int point_index,
|
|
hb_direction_t direction,
|
|
hb_position_t *x, hb_position_t *y)
|
|
{
|
|
hb_bool_t ret = hb_font_get_glyph_contour_point (font, glyph, point_index, x, y);
|
|
|
|
if (ret)
|
|
hb_font_subtract_glyph_origin_for_direction (font, glyph, direction, x, y);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* hb_face_t
|
|
*/
|
|
|
|
static hb_face_t _hb_face_nil = {
|
|
HB_OBJECT_HEADER_STATIC,
|
|
|
|
TRUE, /* immutable */
|
|
|
|
NULL, /* reference_table */
|
|
NULL, /* user_data */
|
|
NULL, /* destroy */
|
|
|
|
NULL, /* ot_layout */
|
|
|
|
0, /* index */
|
|
1000 /* upem */
|
|
};
|
|
|
|
|
|
hb_face_t *
|
|
hb_face_create_for_tables (hb_reference_table_func_t reference_table,
|
|
void *user_data,
|
|
hb_destroy_func_t destroy)
|
|
{
|
|
hb_face_t *face;
|
|
|
|
if (!reference_table || !(face = hb_object_create<hb_face_t> ())) {
|
|
if (destroy)
|
|
destroy (user_data);
|
|
return &_hb_face_nil;
|
|
}
|
|
|
|
face->reference_table = reference_table;
|
|
face->user_data = user_data;
|
|
face->destroy = destroy;
|
|
|
|
face->ot_layout = _hb_ot_layout_create (face);
|
|
|
|
face->upem = 0;
|
|
|
|
return face;
|
|
}
|
|
|
|
|
|
typedef struct _hb_face_for_data_closure_t {
|
|
hb_blob_t *blob;
|
|
unsigned int index;
|
|
} hb_face_for_data_closure_t;
|
|
|
|
static hb_face_for_data_closure_t *
|
|
_hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
|
|
{
|
|
hb_face_for_data_closure_t *closure;
|
|
|
|
closure = (hb_face_for_data_closure_t *) malloc (sizeof (hb_face_for_data_closure_t));
|
|
if (unlikely (!closure))
|
|
return NULL;
|
|
|
|
closure->blob = blob;
|
|
closure->index = index;
|
|
|
|
return closure;
|
|
}
|
|
|
|
static void
|
|
_hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
|
|
{
|
|
hb_blob_destroy (closure->blob);
|
|
free (closure);
|
|
}
|
|
|
|
static hb_blob_t *
|
|
_hb_face_for_data_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data)
|
|
{
|
|
hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) user_data;
|
|
|
|
if (tag == HB_TAG_NONE)
|
|
return hb_blob_reference (data->blob);
|
|
|
|
const OpenTypeFontFile &ot_file = *Sanitizer<OpenTypeFontFile>::lock_instance (data->blob);
|
|
const OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
|
|
|
|
const OpenTypeTable &table = ot_face.get_table_by_tag (tag);
|
|
|
|
hb_blob_t *blob = hb_blob_create_sub_blob (data->blob, table.offset, table.length);
|
|
|
|
return blob;
|
|
}
|
|
|
|
hb_face_t *
|
|
hb_face_create (hb_blob_t *blob,
|
|
unsigned int index)
|
|
{
|
|
hb_face_t *face;
|
|
|
|
if (unlikely (!blob || !hb_blob_get_length (blob)))
|
|
return &_hb_face_nil;
|
|
|
|
hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (Sanitizer<OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
|
|
|
|
if (unlikely (!closure))
|
|
return &_hb_face_nil;
|
|
|
|
face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
|
|
closure,
|
|
(hb_destroy_func_t) _hb_face_for_data_closure_destroy);
|
|
|
|
hb_face_set_index (face, index);
|
|
|
|
return face;
|
|
}
|
|
|
|
hb_face_t *
|
|
hb_face_get_empty (void)
|
|
{
|
|
return &_hb_face_nil;
|
|
}
|
|
|
|
|
|
hb_face_t *
|
|
hb_face_reference (hb_face_t *face)
|
|
{
|
|
return hb_object_reference (face);
|
|
}
|
|
|
|
void
|
|
hb_face_destroy (hb_face_t *face)
|
|
{
|
|
if (!hb_object_destroy (face)) return;
|
|
|
|
_hb_ot_layout_destroy (face->ot_layout);
|
|
|
|
if (face->destroy)
|
|
face->destroy (face->user_data);
|
|
|
|
free (face);
|
|
}
|
|
|
|
hb_bool_t
|
|
hb_face_set_user_data (hb_face_t *face,
|
|
hb_user_data_key_t *key,
|
|
void * data,
|
|
hb_destroy_func_t destroy,
|
|
hb_bool_t replace)
|
|
{
|
|
return hb_object_set_user_data (face, key, data, destroy, replace);
|
|
}
|
|
|
|
void *
|
|
hb_face_get_user_data (hb_face_t *face,
|
|
hb_user_data_key_t *key)
|
|
{
|
|
return hb_object_get_user_data (face, key);
|
|
}
|
|
|
|
void
|
|
hb_face_make_immutable (hb_face_t *face)
|
|
{
|
|
if (hb_object_is_inert (face))
|
|
return;
|
|
|
|
face->immutable = true;
|
|
}
|
|
|
|
hb_bool_t
|
|
hb_face_is_immutable (hb_face_t *face)
|
|
{
|
|
return face->immutable;
|
|
}
|
|
|
|
|
|
hb_blob_t *
|
|
hb_face_reference_table (hb_face_t *face,
|
|
hb_tag_t tag)
|
|
{
|
|
hb_blob_t *blob;
|
|
|
|
if (unlikely (!face || !face->reference_table))
|
|
return hb_blob_get_empty ();
|
|
|
|
blob = face->reference_table (face, tag, face->user_data);
|
|
if (unlikely (!blob))
|
|
return hb_blob_get_empty ();
|
|
|
|
return blob;
|
|
}
|
|
|
|
hb_blob_t *
|
|
hb_face_reference_blob (hb_face_t *face)
|
|
{
|
|
return hb_face_reference_table (face, HB_TAG_NONE);
|
|
}
|
|
|
|
void
|
|
hb_face_set_index (hb_face_t *face,
|
|
unsigned int index)
|
|
{
|
|
if (hb_object_is_inert (face))
|
|
return;
|
|
|
|
face->index = 0;
|
|
}
|
|
|
|
unsigned int
|
|
hb_face_get_index (hb_face_t *face)
|
|
{
|
|
return face->index;
|
|
}
|
|
|
|
void
|
|
hb_face_set_upem (hb_face_t *face,
|
|
unsigned int upem)
|
|
{
|
|
if (hb_object_is_inert (face))
|
|
return;
|
|
|
|
face->upem = upem;
|
|
}
|
|
|
|
unsigned int
|
|
hb_face_get_upem (hb_face_t *face)
|
|
{
|
|
if (unlikely (!face->upem)) {
|
|
hb_blob_t *head_blob = Sanitizer<head>::sanitize (hb_face_reference_table (face, HB_OT_TAG_head));
|
|
const head *head_table = Sanitizer<head>::lock_instance (head_blob);
|
|
face->upem = head_table->get_upem ();
|
|
hb_blob_destroy (head_blob);
|
|
}
|
|
return face->upem;
|
|
}
|
|
|
|
|
|
/*
|
|
* hb_font_t
|
|
*/
|
|
|
|
static hb_font_t _hb_font_nil = {
|
|
HB_OBJECT_HEADER_STATIC,
|
|
|
|
TRUE, /* immutable */
|
|
|
|
NULL, /* parent */
|
|
&_hb_face_nil,
|
|
|
|
0, /* x_scale */
|
|
0, /* y_scale */
|
|
|
|
0, /* x_ppem */
|
|
0, /* y_ppem */
|
|
|
|
&_hb_font_funcs_nil, /* klass */
|
|
NULL, /* user_data */
|
|
NULL /* destroy */
|
|
};
|
|
|
|
hb_font_t *
|
|
hb_font_create (hb_face_t *face)
|
|
{
|
|
hb_font_t *font;
|
|
|
|
if (unlikely (!face))
|
|
face = &_hb_face_nil;
|
|
if (unlikely (hb_object_is_inert (face)))
|
|
return &_hb_font_nil;
|
|
if (!(font = hb_object_create<hb_font_t> ()))
|
|
return &_hb_font_nil;
|
|
|
|
hb_face_make_immutable (face);
|
|
font->face = hb_face_reference (face);
|
|
font->klass = &_hb_font_funcs_nil;
|
|
|
|
return font;
|
|
}
|
|
|
|
hb_font_t *
|
|
hb_font_create_sub_font (hb_font_t *parent)
|
|
{
|
|
if (unlikely (!parent))
|
|
return &_hb_font_nil;
|
|
|
|
hb_font_t *font = hb_font_create (parent->face);
|
|
|
|
if (unlikely (hb_object_is_inert (font)))
|
|
return font;
|
|
|
|
hb_font_make_immutable (parent);
|
|
font->parent = hb_font_reference (parent);
|
|
|
|
font->x_scale = parent->x_scale;
|
|
font->y_scale = parent->y_scale;
|
|
font->x_ppem = parent->x_ppem;
|
|
font->y_ppem = parent->y_ppem;
|
|
|
|
font->klass = &_hb_font_funcs_nil;
|
|
|
|
return font;
|
|
}
|
|
|
|
hb_font_t *
|
|
hb_font_get_empty (void)
|
|
{
|
|
return &_hb_font_nil;
|
|
}
|
|
|
|
hb_font_t *
|
|
hb_font_reference (hb_font_t *font)
|
|
{
|
|
return hb_object_reference (font);
|
|
}
|
|
|
|
void
|
|
hb_font_destroy (hb_font_t *font)
|
|
{
|
|
if (!hb_object_destroy (font)) return;
|
|
|
|
hb_font_destroy (font->parent);
|
|
hb_face_destroy (font->face);
|
|
hb_font_funcs_destroy (font->klass);
|
|
if (font->destroy)
|
|
font->destroy (font->user_data);
|
|
|
|
free (font);
|
|
}
|
|
|
|
hb_bool_t
|
|
hb_font_set_user_data (hb_font_t *font,
|
|
hb_user_data_key_t *key,
|
|
void * data,
|
|
hb_destroy_func_t destroy,
|
|
hb_bool_t replace)
|
|
{
|
|
return hb_object_set_user_data (font, key, data, destroy, replace);
|
|
}
|
|
|
|
void *
|
|
hb_font_get_user_data (hb_font_t *font,
|
|
hb_user_data_key_t *key)
|
|
{
|
|
return hb_object_get_user_data (font, key);
|
|
}
|
|
|
|
void
|
|
hb_font_make_immutable (hb_font_t *font)
|
|
{
|
|
if (hb_object_is_inert (font))
|
|
return;
|
|
|
|
font->immutable = true;
|
|
}
|
|
|
|
hb_bool_t
|
|
hb_font_is_immutable (hb_font_t *font)
|
|
{
|
|
return font->immutable;
|
|
}
|
|
|
|
hb_font_t *
|
|
hb_font_get_parent (hb_font_t *font)
|
|
{
|
|
return font->parent;
|
|
}
|
|
|
|
hb_face_t *
|
|
hb_font_get_face (hb_font_t *font)
|
|
{
|
|
return font->face;
|
|
}
|
|
|
|
|
|
void
|
|
hb_font_set_funcs (hb_font_t *font,
|
|
hb_font_funcs_t *klass,
|
|
void *user_data,
|
|
hb_destroy_func_t destroy)
|
|
{
|
|
if (font->immutable)
|
|
return;
|
|
|
|
if (font->destroy)
|
|
font->destroy (font->user_data);
|
|
|
|
if (!klass)
|
|
klass = &_hb_font_funcs_nil;
|
|
|
|
hb_font_funcs_reference (klass);
|
|
hb_font_funcs_destroy (font->klass);
|
|
font->klass = klass;
|
|
font->user_data = user_data;
|
|
font->destroy = destroy;
|
|
}
|
|
|
|
|
|
void
|
|
hb_font_set_scale (hb_font_t *font,
|
|
int x_scale,
|
|
int y_scale)
|
|
{
|
|
if (font->immutable)
|
|
return;
|
|
|
|
font->x_scale = x_scale;
|
|
font->y_scale = y_scale;
|
|
}
|
|
|
|
void
|
|
hb_font_get_scale (hb_font_t *font,
|
|
int *x_scale,
|
|
int *y_scale)
|
|
{
|
|
if (x_scale) *x_scale = font->x_scale;
|
|
if (y_scale) *y_scale = font->y_scale;
|
|
}
|
|
|
|
void
|
|
hb_font_set_ppem (hb_font_t *font,
|
|
unsigned int x_ppem,
|
|
unsigned int y_ppem)
|
|
{
|
|
if (font->immutable)
|
|
return;
|
|
|
|
font->x_ppem = x_ppem;
|
|
font->y_ppem = y_ppem;
|
|
}
|
|
|
|
void
|
|
hb_font_get_ppem (hb_font_t *font,
|
|
unsigned int *x_ppem,
|
|
unsigned int *y_ppem)
|
|
{
|
|
if (x_ppem) *x_ppem = font->x_ppem;
|
|
if (y_ppem) *y_ppem = font->y_ppem;
|
|
}
|
|
|
|
|