static unsigned int get_line_idx(unsigned int current_idx)
{
unsigned int line_idx;
char* line_idx_addr;
char* c;
int i;
c = (char*)&line_idx;
for (i = 0; i < sizeof(unsigned int); i++)
{
line_idx_addr = get_idx_addr_in_buf(current_idx);
*c = *line_idx_addr;
current_idx = get_buf_idx(current_idx + 1);
c++;
}
return line_idx;
}
static inline void set_line_next_idx(unsigned int next_line_idx_idx, unsigned int line_idx)
{
int i = 0;
char *c;
c = (char*)&line_idx;
for (i = 0; i < sizeof(unsigned int); i++ )
{
char* idx_addr = get_idx_addr_in_buf(next_line_idx_idx);
*idx_addr = *c;
next_line_idx_idx = get_buf_idx(next_line_idx_idx + 1);
c++;
}
return;
}
/* 向屏幕打印缓存中的字符 */
static int draw_a_line(unsigned int* pos_x, unsigned int* pos_y, unsigned int start, unsigned int end)
{
u16 gbk_code;
unsigned char *c, *byte2;
int lf = 0;
int count = 0;
unsigned int p_string = get_buf_idx(start);
unsigned int color = dsp_ctx.color;
unsigned int cur_x = *pos_x;
unsigned int cur_y = *pos_y;
/* Disable the cursor while we are drawing */
console_cursor_toggle(false);
while (p_string != end)
{
//c = *p_string;
c = (unsigned char*)get_idx_addr_in_buf(p_string);
if (*c == ' ')
{
cur_x += DOTFNT_CHAR_SPACE_LEN;
p_string = get_buf_idx(p_string + 1);
}
else if (*c == '\n')
{
cur_x = 0;
lf = 1;
p_string = get_buf_idx(p_string + 1);
}
else if (*c == 0xd)
{
p_string = get_buf_idx(p_string + 1);
//cur_x = 0;
}
else if (*c == 0x09/*tab*/)
{
p_string = get_buf_idx(p_string + 1);
cur_x |= 31;
cur_x++;
}
/* English is 1 byte */
else if (*c >= 33 && *c < 127)
{
cur_x += draw_eng_char(*c, cur_x, cur_y, color);
p_string = get_buf_idx(p_string + 1);
}
/*127退格键,27四个方向键,131-138,255是F3-10 F12,140是F11*/
else if (*c == 127 || *c == 27 || *c == 131 ||
*c == 255 || *c == 132 || *c == 133 ||
*c == 134 || *c == 135 || *c == 136 ||
*c == 137 || *c == 138 || *c == 140){
p_string = get_buf_idx(p_string + 1);/*＋1 就是跳过他们，这些过滤的键，直接跳过，就不绘制了*/
}
/* Chinese is 2 bytes */
else
{
byte2 = get_idx_addr_in_buf(get_buf_idx(p_string + 1));
gbk_code = (*c << 8) | (*byte2);
cur_x += draw_gbk_chinese(gbk_code, cur_x, cur_y, color);
p_string = get_buf_idx(p_string + 2);
}
/* Modify position,check overflow */
if (cur_x + DOTFNT_ENG_CHAR_WIDTH >= dsp_ctx.max_x)
{
cur_x = 0;
}
if (cur_x == 0) /* 已经打印完一行(屏幕)，退出 */
{
cur_y += DOTFNT_CHAR_LINE_HEIGHT;
break;
}
}
*pos_x = cur_x;
*pos_y = cur_y;
/* Set the cursor position before enable cursor */
console_cursor_move(cur_x, cur_y);
console_cursor_toggle(true);
count = get_buf_length(start, p_string);
/* 遇到\n，需要跨过缓存中保存的index */
if (lf)
{
count += 2 * sizeof(unsigned int);
}
return count;
}