rtt-f030/components/rtgui/common/font.c

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/*
* File : font.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2009-10-16 Bernard first version
*/
#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
#ifdef RTGUI_USING_FONT12
if (rtgui_default_font == RT_NULL)
rtgui_font_set_defaut(&rtgui_font_asc12);
#endif
#ifdef RTGUI_USING_FONT16
if (rtgui_default_font == RT_NULL)
rtgui_font_set_defaut(&rtgui_font_asc16);
#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);
}
void rtgui_font_system_remove_font(struct rtgui_font* font)
{
rtgui_list_remove(&_rtgui_font_list, &(font->list));
}
struct rtgui_font* rtgui_font_default()
{
return rtgui_default_font;
}
void rtgui_font_set_defaut(struct rtgui_font* font)
{
rtgui_default_font = font;
}
struct rtgui_font* rtgui_font_refer(const rt_uint8_t* 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((const char*)font->family, (const char*)family, RTGUI_NAME_MAX) == 0) &&
font->height == height)
{
font->refer_count ++;
return font;
}
}
return RT_NULL;
}
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);
}
}
/* 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;
}
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));
}
}
static void rtgui_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const char* text, rt_ubase_t len, struct rtgui_rect* rect);
static void rtgui_bitmap_font_get_metrics(struct rtgui_font* font, const char* text, rtgui_rect_t* rect);
struct rtgui_font_engine bmp_font_engine =
{
RT_NULL,
RT_NULL,
rtgui_bitmap_font_draw_text,
rtgui_bitmap_font_get_metrics
};
void rtgui_bitmap_font_draw_char(struct rtgui_font_bitmap* font, struct rtgui_dc* dc, const char ch,
rtgui_rect_t* rect)
{
const rt_uint8_t* font_ptr;
rt_uint16_t x, y, h;
register rt_base_t i, j, k, word_bytes;
/* check first and last char */
if (ch < font->first_char || ch > font->last_char) return;
x = rect->x1;
y = rect->y1;
word_bytes = (((font->width - 1) / 8) + 1);
font_ptr = font->bmp + (ch - font->first_char) * word_bytes * font->height;
h = (font->height + y > rect->y2) ? rect->y2 - rect->y1 : font->height;
for (i = 0; i < h; i++)
{
for (j = 0; j < word_bytes; j++)
{
for (k = 0; k < 8; k++)
{
if (((font_ptr[i * word_bytes + j] >> (7 - k)) & 0x01) != 0)
{
/* draw a pixel */
rtgui_dc_draw_point(dc, k + 8 * j + x, i + y);
}
}
}
}
}
static void rtgui_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const char* text, rt_ubase_t len, struct rtgui_rect* rect)
{
struct rtgui_font_bitmap* bmp_font = (struct rtgui_font_bitmap*)(font->data);
RT_ASSERT(bmp_font != RT_NULL);
while (len-- && rect->x1 < rect->x2)
{
rtgui_bitmap_font_draw_char(bmp_font, dc, *text, rect);
/* move x to next character */
rect->x1 += bmp_font->width;
text ++;
}
}
static void rtgui_bitmap_font_get_metrics(struct rtgui_font* font, const char* text, rtgui_rect_t* rect)
{
struct rtgui_font_bitmap* bmp_font = (struct rtgui_font_bitmap*)(font->data);
RT_ASSERT(bmp_font != RT_NULL);
/* set metrics rect */
rect->x1 = rect->y1 = 0;
rect->x2 = bmp_font->width * (rt_int16_t)rt_strlen((const char*)text);
rect->y2 = bmp_font->height;
}