144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/*
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* File : font.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2009-10-16 Bernard first version
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*/
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#ifndef __RTGUI_FONT_H__
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#define __RTGUI_FONT_H__
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#include <rtgui/rtgui.h>
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#include <rtgui/list.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct rtgui_font;
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struct rtgui_dc;
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struct rtgui_rect;
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struct rtgui_font_engine
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{
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/* font engine function */
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void (*font_init)(struct rtgui_font *font);
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void (*font_load)(struct rtgui_font *font);
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void (*font_draw_text)(struct rtgui_font *font, struct rtgui_dc *dc, const char *text,
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rt_ubase_t len, struct rtgui_rect *rect);
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void (*font_get_metrics)(struct rtgui_font *font, const char *text, struct rtgui_rect *rect);
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};
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/*
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* bitmap font engine
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*/
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struct rtgui_font_bitmap
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{
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const rt_uint8_t *bmp; /* bitmap font data */
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const rt_uint8_t *char_width; /* each character width, NULL for fixed font */
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const rt_uint32_t *offset; /* offset for each character */
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rt_uint16_t width; /* font width */
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rt_uint16_t height; /* font height */
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rt_uint8_t first_char;
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rt_uint8_t last_char;
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};
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extern const struct rtgui_font_engine bmp_font_engine;
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#include <rtgui/tree.h>
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SPLAY_HEAD(cache_tree, hz_cache);
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struct hz_cache
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{
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SPLAY_ENTRY(hz_cache) hz_node;
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rt_uint16_t hz_id;
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};
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struct rtgui_hz_file_font
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{
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struct cache_tree cache_root;
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rt_uint16_t cache_size;
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/* font size */
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rt_uint16_t font_size;
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rt_uint16_t font_data_size;
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/* file descriptor */
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int fd;
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/* font file name */
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const char *font_fn;
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};
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extern const struct rtgui_font_engine rtgui_hz_file_font_engine;
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struct rtgui_font
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{
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/* font name */
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char *family;
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/* font height */
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rt_uint16_t height;
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/* refer count */
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rt_uint32_t refer_count;
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/* font engine */
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const struct rtgui_font_engine *engine;
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/* font private data */
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void *data;
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/* the font list */
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rtgui_list_t list;
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};
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typedef struct rtgui_font rtgui_font_t;
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void rtgui_font_system_init(void);
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void rtgui_font_system_add_font(struct rtgui_font *font);
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void rtgui_font_system_remove_font(struct rtgui_font *font);
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struct rtgui_font *rtgui_font_default(void);
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void rtgui_font_set_defaut(struct rtgui_font *font);
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struct rtgui_font *rtgui_font_refer(const char *family, rt_uint16_t height);
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void rtgui_font_derefer(struct rtgui_font *font);
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/* draw a text */
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void rtgui_font_draw(struct rtgui_font *font, struct rtgui_dc *dc, const char *text, rt_ubase_t len, struct rtgui_rect *rect);
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int rtgui_font_get_string_width(struct rtgui_font *font, const char *text);
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void rtgui_font_get_metrics(struct rtgui_font *font, const char *text, struct rtgui_rect *rect);
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/* used by stract font */
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#define FONT_BMP_DATA_BEGIN
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#define FONT_BMP_DATA_END
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struct rtgui_char_position
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{
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/* Keep the size of this struct within 4 bytes so it can be passed by
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* value. */
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/* How long this char is. */
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rt_uint16_t char_width;
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/* How many bytes remaining from current pointer. At least, it will be 1. */
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rt_uint16_t remain;
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};
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/*
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* @len the length of @str.
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* @offset the char offset on the string to check with.
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*/
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struct rtgui_char_position _string_char_width(char *str, rt_size_t len, rt_size_t offset);
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#ifdef __cplusplus
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}
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#endif
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#endif
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