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/*
* File : font.c
* 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
* 2013-08-31 Bernard remove the default font setting.
* (which set by theme)
*/
#include <rtgui/font.h>
#include <rtgui/dc.h>
static rtgui_list_t _rtgui_font_list;
static struct rtgui_font *rtgui_default_font;
extern struct rtgui_font rtgui_font_asc16;
extern struct rtgui_font rtgui_font_arial16;
extern struct rtgui_font rtgui_font_asc12;
extern struct rtgui_font rtgui_font_arial12;
#ifdef RTGUI_USING_FONTHZ
extern struct rtgui_font rtgui_font_hz16;
extern struct rtgui_font rtgui_font_hz12;
#endif
void rtgui_font_system_init()
{
rtgui_list_init(&(_rtgui_font_list));
/* set default font to NULL */
rtgui_default_font = RT_NULL;
#ifdef RTGUI_USING_FONT16
rtgui_font_system_add_font(&rtgui_font_asc16);
#ifdef RTGUI_USING_FONTHZ
rtgui_font_system_add_font(&rtgui_font_hz16);
#endif
#endif
#ifdef RTGUI_USING_FONT12
rtgui_font_system_add_font(&rtgui_font_asc12);
#ifdef RTGUI_USING_FONTHZ
rtgui_font_system_add_font(&rtgui_font_hz12);
#endif
#endif
}
void rtgui_font_system_add_font(struct rtgui_font *font)
{
rtgui_list_init(&(font->list));
rtgui_list_append(&_rtgui_font_list, &(font->list));
/* init font */
if (font->engine->font_init != RT_NULL)
font->engine->font_init(font);
/* first refer, load it */
if (font->engine->font_load != RT_NULL)
font->engine->font_load(font);
}
RTM_EXPORT(rtgui_font_system_add_font);
void rtgui_font_system_remove_font(struct rtgui_font *font)
{
rtgui_list_remove(&_rtgui_font_list, &(font->list));
}
RTM_EXPORT(rtgui_font_system_remove_font);
struct rtgui_font *rtgui_font_default()
{
return rtgui_default_font;
}
void rtgui_font_set_defaut(struct rtgui_font *font)
{
// rt_kprintf("set font size to %d\n", font->height);
rtgui_default_font = font;
}
struct rtgui_font *rtgui_font_refer(const char *family, rt_uint16_t height)
{
/* search font */
struct rtgui_list_node *node;
struct rtgui_font *font;
rtgui_list_foreach(node, &_rtgui_font_list)
{
font = rtgui_list_entry(node, struct rtgui_font, list);
if ((rt_strncmp(font->family, family, RTGUI_NAME_MAX) == 0) &&
font->height == height)
{
font->refer_count ++;
return font;
}
}
rtgui_list_foreach(node, &_rtgui_font_list)
{
font = rtgui_list_entry(node, struct rtgui_font, list);
if (rt_strncmp(font->family, family, RTGUI_NAME_MAX) == 0)
{
font->refer_count ++;
return font;
}
}
return RT_NULL;
}
RTM_EXPORT(rtgui_font_refer);
void rtgui_font_derefer(struct rtgui_font *font)
{
RT_ASSERT(font != RT_NULL);
font->refer_count --;
/* no refer, remove font */
if (font->refer_count == 0)
{
rtgui_font_system_remove_font(font);
}
}
RTM_EXPORT(rtgui_font_derefer);
/* 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)
{
RT_ASSERT(font != RT_NULL);
if (font->engine != RT_NULL &&
font->engine->font_draw_text != RT_NULL)
{
font->engine->font_draw_text(font, dc, text, len, rect);
}
}
int rtgui_font_get_string_width(struct rtgui_font *font, const char *text)
{
rtgui_rect_t rect;
/* get metrics */
rtgui_font_get_metrics(font, text, &rect);
return rect.x2 - rect.x1;
}
RTM_EXPORT(rtgui_font_get_string_width);
void rtgui_font_get_metrics(struct rtgui_font *font, const char *text, rtgui_rect_t *rect)
{
RT_ASSERT(font != RT_NULL);
if (font->engine != RT_NULL &&
font->engine->font_get_metrics != RT_NULL)
{
font->engine->font_get_metrics(font, text, rect);
}
else
{
/* no font engine found, set rect to zero */
rt_memset(rect, 0, sizeof(rtgui_rect_t));
}
}
RTM_EXPORT(rtgui_font_get_metrics);
/* GB18030 encoding:
* 1st byte 2nd byte 3rd byte 4th byte
* 1byte: 0x00~0x7F
* 2bytes: 0x81~0xFE 0x40~0xFE
* 4bytes: 0x81~0xFE 0x30~0x39 0x81~0xFE 0x30~0x39
*/
struct rtgui_char_position _string_char_width(char *str, rt_size_t len, rt_size_t offset)
{
struct rtgui_char_position pos = {0, 0};
unsigned char *pc;
RT_ASSERT(offset < len);
pc = (unsigned char*)str;
while (pc <= (unsigned char*)str + offset)
{
if (pc[0] < 0x80)
{
pos.char_width = 1;
}
else if (0x81 <= pc[0] && pc[0] <= 0xFE)
{
if (0x40 <= pc[1] && pc[1] <= 0xFE)
{
/* GBK */
pos.char_width = 2;
}
else if (0x30 <= pc[1] && pc[1] <= 0x39)
{
/* GB18030 */
pos.char_width = 4;
}
else
{
/* FIXME: unknown encoding */
RT_ASSERT(0);
pos.char_width = 1;
}
}
else
{
/* FIXME: unknown encoding */
RT_ASSERT(0);
pos.char_width = 1;
}
pc += pos.char_width;
}
pos.remain = pc - (unsigned char*)&str[offset];
return pos;
}
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