// 屏幕输出一个字符(带颜色)
static void console_putc_color(char c, real_color_t back, real_color_t fore)
{
uint8_t back_color = (uint8_t)back;
uint8_t fore_color = (uint8_t)fore;
uint8_t attribute_byte = (back_color << 4) | (fore_color & 0x0F);
uint16_t attribute = attribute_byte << 8;
// 0x08 是 退格键 的 ASCII 码
// 0x09 是 tab 键 的 ASCII 码
if (c == 0x08 && buffer_x) {
buffer_x--;
} else if (c == 0x09) {
buffer_x = (buffer_x+8) & ~(8-1);
} else if (c == '\r') {
buffer_x = 0;
} else if (c == '\n') {
buffer_x = 0;
buffer_y++;
} else if (c >= ' ') {
video_buffer[buffer_y * BUFF_WIDTH + buffer_x] = c | attribute;
buffer_x++;
}
// 每 80 个字符一行，满80就必须换行了
if (buffer_x == BUFF_WIDTH) {
buffer_x = 0;
buffer_y ++;
}
// 滚动缓冲区
scroll_buffer();
}
static void append_char(char c)
{
if(!bb->lines) {bb->lines++; cursor_pos=0;}
if(bb->text[bb->lines - 1]==NULL)
{
bb->text[bb->lines - 1]=malloc(CC_MAX_LINE_LENGTH);
memset(bb->text[bb->lines - 1],0,CC_MAX_LINE_LENGTH);
cursor_pos=0;
}
if(c=='\n')
{
if(cursor_pos>0 && bb->lines < SUB_MAX_TEXT)
{
bb->lines++;cursor_pos=0;
if(cc_mode==CC_ROLLUP){ //Carriage return - scroll buffer one line up
bb->text[bb->lines - 1]=calloc(1, CC_MAX_LINE_LENGTH);
scroll_buffer(bb);
}
}
}
else
{
if(cursor_pos==CC_MAX_LINE_LENGTH-1)
{
fprintf(stderr,"CC: append_char() reached CC_MAX_LINE_LENGTH!\n");
return;
}
bb->text[bb->lines - 1][cursor_pos++]=c;
}
//In CC roll-up mode data should be shown immediately
if(cc_mode==CC_ROLLUP) display_buffer(bb);
}
