448 lines
12 KiB
C
448 lines
12 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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#ifndef HB_H_IN
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#error "Include <hb.h> instead."
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#endif
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#ifndef HB_FONT_H
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#define HB_FONT_H
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#include "hb-common.h"
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#include "hb-blob.h"
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HB_BEGIN_DECLS
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typedef struct hb_face_t hb_face_t;
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typedef struct hb_font_t hb_font_t;
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/*
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* hb_face_t
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*/
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hb_face_t *
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hb_face_create (hb_blob_t *blob,
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unsigned int index);
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typedef hb_blob_t * (*hb_reference_table_func_t) (hb_face_t *face, hb_tag_t tag, void *user_data);
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/* calls destroy() when not needing user_data anymore */
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hb_face_t *
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hb_face_create_for_tables (hb_reference_table_func_t reference_table_func,
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void *user_data,
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hb_destroy_func_t destroy);
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hb_face_t *
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hb_face_get_empty (void);
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hb_face_t *
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hb_face_reference (hb_face_t *face);
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void
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hb_face_destroy (hb_face_t *face);
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hb_bool_t
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hb_face_set_user_data (hb_face_t *face,
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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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void *
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hb_face_get_user_data (hb_face_t *face,
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hb_user_data_key_t *key);
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void
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hb_face_make_immutable (hb_face_t *face);
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hb_bool_t
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hb_face_is_immutable (hb_face_t *face);
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hb_blob_t *
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hb_face_reference_table (hb_face_t *face,
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hb_tag_t tag);
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hb_blob_t *
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hb_face_reference_blob (hb_face_t *face);
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void
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hb_face_set_index (hb_face_t *face,
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unsigned int index);
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unsigned int
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hb_face_get_index (hb_face_t *face);
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void
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hb_face_set_upem (hb_face_t *face,
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unsigned int upem);
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unsigned int
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hb_face_get_upem (hb_face_t *face);
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/*
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* hb_font_funcs_t
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*/
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typedef struct hb_font_funcs_t hb_font_funcs_t;
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hb_font_funcs_t *
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hb_font_funcs_create (void);
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hb_font_funcs_t *
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hb_font_funcs_get_empty (void);
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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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void
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hb_font_funcs_destroy (hb_font_funcs_t *ffuncs);
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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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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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void
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hb_font_funcs_make_immutable (hb_font_funcs_t *ffuncs);
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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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/* glyph extents */
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typedef struct hb_glyph_extents_t
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{
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hb_position_t x_bearing;
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hb_position_t y_bearing;
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hb_position_t width;
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hb_position_t height;
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} hb_glyph_extents_t;
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/* func types */
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typedef hb_bool_t (*hb_font_get_glyph_func_t) (hb_font_t *font, void *font_data,
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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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void *user_data);
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typedef hb_position_t (*hb_font_get_glyph_advance_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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void *user_data);
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_h_advance_func_t;
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typedef hb_font_get_glyph_advance_func_t hb_font_get_glyph_v_advance_func_t;
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typedef hb_bool_t (*hb_font_get_glyph_origin_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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hb_position_t *x, hb_position_t *y,
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void *user_data);
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_h_origin_func_t;
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typedef hb_font_get_glyph_origin_func_t hb_font_get_glyph_v_origin_func_t;
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typedef hb_position_t (*hb_font_get_glyph_kerning_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
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void *user_data);
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typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_h_kerning_func_t;
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typedef hb_font_get_glyph_kerning_func_t hb_font_get_glyph_v_kerning_func_t;
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typedef hb_bool_t (*hb_font_get_glyph_extents_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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hb_glyph_extents_t *extents,
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void *user_data);
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typedef hb_bool_t (*hb_font_get_glyph_contour_point_func_t) (hb_font_t *font, void *font_data,
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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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void *user_data);
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typedef hb_bool_t (*hb_font_get_glyph_name_func_t) (hb_font_t *font, void *font_data,
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hb_codepoint_t glyph,
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char *name, unsigned int size,
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void *user_data);
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typedef hb_bool_t (*hb_font_get_glyph_from_name_func_t) (hb_font_t *font, void *font_data,
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const char *name, int len, /* -1 means nul-terminated */
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hb_codepoint_t *glyph,
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void *user_data);
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/* func setters */
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void
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hb_font_funcs_set_glyph_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_func_t glyph_func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_h_advance_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_h_advance_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_v_advance_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_v_advance_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_h_origin_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_h_origin_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_v_origin_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_v_origin_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_h_kerning_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_h_kerning_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_v_kerning_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_v_kerning_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_extents_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_extents_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_contour_point_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_contour_point_func_t func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_name_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_name_func_t glyph_func,
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void *user_data, hb_destroy_func_t destroy);
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void
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hb_font_funcs_set_glyph_from_name_func (hb_font_funcs_t *ffuncs,
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hb_font_get_glyph_from_name_func_t glyph_func,
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void *user_data, hb_destroy_func_t destroy);
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/* func dispatch */
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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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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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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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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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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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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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hb_position_t
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hb_font_get_glyph_v_kerning (hb_font_t *font,
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hb_codepoint_t top_glyph, hb_codepoint_t bottom_glyph);
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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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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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hb_bool_t
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hb_font_get_glyph_name (hb_font_t *font,
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hb_codepoint_t glyph,
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char *name, unsigned int size);
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hb_bool_t
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hb_font_get_glyph_from_name (hb_font_t *font,
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const char *name, int len, /* -1 means nul-terminated */
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hb_codepoint_t *glyph);
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/* high-level funcs, 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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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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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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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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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,
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hb_position_t *x, hb_position_t *y);
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hb_bool_t
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hb_font_get_glyph_extents_for_origin (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_glyph_extents_t *extents);
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hb_bool_t
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hb_font_get_glyph_contour_point_for_origin (hb_font_t *font,
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hb_codepoint_t glyph, unsigned int point_index,
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hb_direction_t direction,
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hb_position_t *x, hb_position_t *y);
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/* Generates gidDDD if glyph has no name. */
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void
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hb_font_glyph_to_string (hb_font_t *font,
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hb_codepoint_t glyph,
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char *s, unsigned int size);
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/* Parses gidDDD and uniUUUU strings automatically. */
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hb_bool_t
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hb_font_glyph_from_string (hb_font_t *font,
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const char *s, int len, /* -1 means nul-terminated */
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hb_codepoint_t *glyph);
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/*
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* hb_font_t
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*/
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/* Fonts are very light-weight objects */
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hb_font_t *
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hb_font_create (hb_face_t *face);
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hb_font_t *
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hb_font_create_sub_font (hb_font_t *parent);
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hb_font_t *
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hb_font_get_empty (void);
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hb_font_t *
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hb_font_reference (hb_font_t *font);
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void
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hb_font_destroy (hb_font_t *font);
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hb_bool_t
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hb_font_set_user_data (hb_font_t *font,
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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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void *
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hb_font_get_user_data (hb_font_t *font,
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hb_user_data_key_t *key);
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void
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hb_font_make_immutable (hb_font_t *font);
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hb_bool_t
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hb_font_is_immutable (hb_font_t *font);
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hb_font_t *
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hb_font_get_parent (hb_font_t *font);
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hb_face_t *
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hb_font_get_face (hb_font_t *font);
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void
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hb_font_set_funcs (hb_font_t *font,
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hb_font_funcs_t *klass,
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void *font_data,
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hb_destroy_func_t destroy);
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/* Be *very* careful with this function! */
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void
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hb_font_set_funcs_data (hb_font_t *font,
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void *font_data,
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hb_destroy_func_t destroy);
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void
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hb_font_set_scale (hb_font_t *font,
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int x_scale,
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int y_scale);
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void
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hb_font_get_scale (hb_font_t *font,
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int *x_scale,
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int *y_scale);
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/*
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* A zero value means "no hinting in that direction"
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*/
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void
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hb_font_set_ppem (hb_font_t *font,
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unsigned int x_ppem,
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unsigned int y_ppem);
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void
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hb_font_get_ppem (hb_font_t *font,
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unsigned int *x_ppem,
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unsigned int *y_ppem);
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HB_END_DECLS
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#endif /* HB_FONT_H */
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