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/*
* File : font.h
* This file is part of RT-Thread GUI Engine
* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2009-10-16 Bernard first version
*/
#ifndef __RTGUI_FONT_H__
#define __RTGUI_FONT_H__
#include <rtgui/rtgui.h>
#include <rtgui/list.h>
#ifdef __cplusplus
extern "C" {
#endif
struct rtgui_font;
struct rtgui_dc;
struct rtgui_rect;
struct rtgui_font_engine
{
/* font engine function */
void (*font_init)(struct rtgui_font *font);
void (*font_load)(struct rtgui_font *font);
void (*font_draw_text)(struct rtgui_font *font, struct rtgui_dc *dc, const char *text,
rt_ubase_t len, struct rtgui_rect *rect);
void (*font_get_metrics)(struct rtgui_font *font, const char *text, struct rtgui_rect *rect);
};
/*
* bitmap font engine
*/
struct rtgui_font_bitmap
{
const rt_uint8_t *bmp; /* bitmap font data */
const rt_uint8_t *char_width; /* each character width, NULL for fixed font */
const rt_uint32_t *offset; /* offset for each character */
rt_uint16_t width; /* font width */
rt_uint16_t height; /* font height */
rt_uint8_t first_char;
rt_uint8_t last_char;
};
extern const struct rtgui_font_engine bmp_font_engine;
#include <rtgui/tree.h>
SPLAY_HEAD(cache_tree, hz_cache);
struct hz_cache
{
SPLAY_ENTRY(hz_cache) hz_node;
rt_uint16_t hz_id;
};
struct rtgui_hz_file_font
{
struct cache_tree cache_root;
rt_uint16_t cache_size;
/* font size */
rt_uint16_t font_size;
rt_uint16_t font_data_size;
/* file descriptor */
int fd;
/* font file name */
const char *font_fn;
};
extern const struct rtgui_font_engine rtgui_hz_file_font_engine;
struct rtgui_font
{
/* font name */
char *family;
/* font height */
rt_uint16_t height;
/* refer count */
rt_uint32_t refer_count;
/* font engine */
const struct rtgui_font_engine *engine;
/* font private data */
void *data;
/* the font list */
rtgui_list_t list;
};
typedef struct rtgui_font rtgui_font_t;
void rtgui_font_system_init(void);
void rtgui_font_system_add_font(struct rtgui_font *font);
void rtgui_font_system_remove_font(struct rtgui_font *font);
struct rtgui_font *rtgui_font_default(void);
void rtgui_font_set_defaut(struct rtgui_font *font);
struct rtgui_font *rtgui_font_refer(const char *family, rt_uint16_t height);
void rtgui_font_derefer(struct rtgui_font *font);
/* draw a text */
void rtgui_font_draw(struct rtgui_font *font, struct rtgui_dc *dc, const char *text, rt_ubase_t len, struct rtgui_rect *rect);
int rtgui_font_get_string_width(struct rtgui_font *font, const char *text);
void rtgui_font_get_metrics(struct rtgui_font *font, const char *text, struct rtgui_rect *rect);
/* used by stract font */
#define FONT_BMP_DATA_BEGIN
#define FONT_BMP_DATA_END
struct rtgui_char_position
{
/* Keep the size of this struct within 4 bytes so it can be passed by
* value. */
/* How long this char is. */
rt_uint16_t char_width;
/* How many bytes remaining from current pointer. At least, it will be 1. */
rt_uint16_t remain;
};
/*
* @len the length of @str.
* @offset the char offset on the string to check with.
*/
struct rtgui_char_position _string_char_width(char *str, rt_size_t len, rt_size_t offset);
#ifdef __cplusplus
}
#endif
#endif
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