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Add ASCII large font support. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@723 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
kyle.hu.gz 2010-05-21 17:42:10 +00:00
parent 0ce26895a5
commit 0b02a2ebca
1 changed files with 17 additions and 13 deletions
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30
components/rtgui/common/font.c
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@ -171,27 +171,31 @@ void rtgui_bitmap_font_draw_char(struct rtgui_font_bitmap* font, struct rtgui_dc
rtgui_rect_t* rect) rtgui_rect_t* rect)
{ {
const rt_uint8_t* font_ptr; const rt_uint8_t* font_ptr;
rt_uint16_t x, y, w, h; rt_uint16_t x, y, h;
register rt_base_t i, j; register rt_base_t i, j, k, word_bytes;
x = rect->x1;
y = rect->y1;
/* check first and last char */ /* check first and last char */
if (ch < font->first_char || ch > font->last_char) return; if (ch < font->first_char || ch > font->last_char) return;
font_ptr = font->bmp + (ch - font->first_char) * font->height;
w = (font->width + x > rect->x2)? rect->x2 - rect->x1 : font->width; x = rect->x1;
h = (font->height + y > rect->y2)? rect->y2 - rect->y1 : font->height; y = rect->y1;
word_bytes = (((font->width - 1) / 8) + 1);
for (i = 0; i < h; i ++ ) 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 < w; j ++) for (j = 0; j < word_bytes; j++)
{ {
if ( ((font_ptr[i] >> (7-j)) & 0x01) != 0) for (k = 0; k < 8; k++)
{ {
/* draw a pixel */ if (((font_ptr[i * word_bytes + j] >> (7 - k)) & 0x01) != 0)
rtgui_dc_draw_point(dc, j + x, i + y); {
/* draw a pixel */
rtgui_dc_draw_point(dc, k + 8 * j + x, i + y);
}
} }
} }
} }