Modest/source/myfont/myfont.h

/*
 Copyright (C) 2016-2017 Alexander Borisov
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 
 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
 Author: lex.borisov@gmail.com (Alexander Borisov)
*/

#ifndef MyFONT_MyFONT_H
#define MyFONT_MyFONT_H
#pragma once

#include <string.h>

#include "myfont/myosi.h"
#include "myfont/cmap.h"
#include "myfont/head.h"
#include "myfont/name.h"
#include "myfont/os_2.h"
#include "myfont/maxp.h"
#include "myfont/hhea.h"
#include "myfont/hmtx.h"
#include "myfont/glyf.h"
#include "myfont/vhea.h"
#include "myfont/vmtx.h"
#include "myfont/pclt.h"
#include "myfont/loca.h"

#include "mycore/utils/mchar_async.h"

#define MyFONT_VERSION_MAJOR 0
#define MyFONT_VERSION_MINOR 0
#define MyFONT_VERSION_PATCH 2

#define MyFONT_VERSION_STRING MyCORE_STR(MyFONT_VERSION_MAJOR) MyCORE_STR(.) MyCORE_STR(MyFONT_VERSION_MINOR) MyCORE_STR(.) MyCORE_STR(MyFONT_VERSION_PATCH)

#ifdef __cplusplus
extern "C" {
#endif

// base
struct myfont_header {
    uint16_t version_major;
    uint16_t version_minor;
    uint16_t numTables;
    uint16_t searchRange;
    uint16_t entrySelector;
    uint16_t rangeShift;
}
typedef myfont_header_t;

struct myfont_table {
    uint32_t tag;
    uint32_t checkSum;
    uint32_t offset;
    uint32_t length;
}
typedef myfont_table_t;

struct myfont_cache {
    uint32_t tables_offset[MyFONT_TKEY_LAST_KEY];
}
typedef myfont_cache_t;

struct myfont_font {
    myfont_header_t     header;
    myfont_cache_t      cache;
    
    myfont_table_cmap_t table_cmap;
    myfont_table_head_t table_head;
    myfont_table_name_t table_name;
    myfont_table_os_2_t table_os_2;
    myfont_table_maxp_t table_maxp;
    myfont_table_hhea_t table_hhea;
    myfont_table_hmtx_t table_hmtx;
    myfont_table_glyf_t table_glyf;
    myfont_table_vmtx_t table_vmtx;
    myfont_table_vhea_t table_vhea;
    myfont_table_pclt_t table_pclt;
    myfont_table_loca_t table_loca;
    
    mchar_async_t* mchar;
    size_t mchar_node_id;
};

myfont_font_t * myfont_create(void);
mystatus_t myfont_init(myfont_font_t *mf);
void myfont_clean(myfont_font_t *mf);
myfont_font_t * myfont_destroy(myfont_font_t *mf, bool self_destroy);

void * myfont_malloc(myfont_font_t* mf, size_t size);
void * myfont_calloc(myfont_font_t* mf, size_t count, size_t size);
void myfont_free(myfont_font_t *mf, void* data);

mystatus_t myfont_load(myfont_font_t* mf, uint8_t* data, size_t data_size);
mystatus_t myfont_load_from_file(myfont_font_t* mf, const char* filepath, uint8_t** return_data, size_t* data_size);
void * myfont_destroy_font_data(myfont_font_t* mf, uint8_t* return_data);

mystatus_t myfont_check_required_tables(myfont_font_t *mf);

float myfont_metrics_baseline(myfont_font_t *mf, float font_size);
float myfont_metrics_ascender(myfont_font_t *mf, float font_size);
float myfont_metrics_descender(myfont_font_t *mf, float font_size);
float myfont_metrics_line_gap(myfont_font_t *mf, float font_size);
float myfont_metrics_x_height(myfont_font_t *mf, float font_size);
float myfont_metrics_cap_height(myfont_font_t *mf, float font_size);
float myfont_metrics_font_height(myfont_font_t *mf, float font_size);

float myfont_metrics_width(myfont_font_t *mf, unsigned long codepoint, float font_size, mystatus_t* status);
float myfont_metrics_height(myfont_font_t *mf, unsigned long codepoint, float font_size, mystatus_t* status);
float myfont_metrics_glyph_offset_y(myfont_font_t *mf, unsigned long codepoint, float font_size, mystatus_t* status);

mystatus_t myfont_load_table(myfont_font_t *mf, void *table, size_t size, enum myfont_table_key tkey);

int16_t myfont_table_version_major(uint32_t version);
int16_t myfont_table_version_minor(uint32_t version);

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* MyFONT_MyFONT_H */