rtt-f030/rtgui/common/font_hz_bmp.c

72 lines
2.0 KiB
C

#include <rtgui/dc.h>
#include <rtgui/font.h>
static void rtgui_hz_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect);
static void rtgui_hz_bitmap_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* text, rtgui_rect_t* rect);
struct rtgui_font_engine hz_bmp_font_engine =
{
RT_NULL,
RT_NULL,
rtgui_hz_bitmap_font_draw_text,
rtgui_hz_bitmap_font_get_metrics
};
static void rtgui_hz_bitmap_font_draw_text(struct rtgui_font* font, struct rtgui_dc* dc, const rt_uint8_t* text, rt_ubase_t len, struct rtgui_rect* rect)
{
rt_base_t h;
rt_uint8_t* str;
struct rtgui_font_bitmap* bmp_font = (struct rtgui_font_bitmap*)(font->data);
RT_ASSERT(bmp_font != RT_NULL);
/* drawing height */
h = (bmp_font->height + rect->y1 > rect->y2)? rect->y2 - rect->y1 : bmp_font->height;
str = (rt_uint8_t*)text;
while (len > 0 && rect->x1 < rect->x2)
{
const rt_uint8_t* font_ptr;
rt_ubase_t sect, index;
register rt_base_t i, j, k;
/* calculate section and index */
sect = *str - 0xA0;
index = *(str+1) - 0xA0;
/* get font pixel data */
font_ptr = bmp_font->bmp + ( 94*(sect-1) + (index-1) )*(bmp_font->width + bmp_font->height);
/* draw word */
for (i=0; i < h; i ++)
{
for (j=0; j < 2; j++)
for (k=0; k < 8; k++)
{
if ( ((font_ptr[i*2 + j] >> (7-k)) & 0x01) != 0 &&
(rect->x1 + 8 * j + k < rect->x2))
{
rtgui_dc_draw_point(dc, rect->x1 + 8*j + k, rect->y1 + i);
}
}
}
/* move x to next character */
rect->x1 += bmp_font->width;
str += 2;
len -= 2;
}
}
static void rtgui_hz_bitmap_font_get_metrics(struct rtgui_font* font, const rt_uint8_t* 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 = (rt_int16_t)(bmp_font->width * rt_strlen((const char*)text));
rect->y2 = bmp_font->height;
}