static void ega_char_update(outdev_t *dev, sysarg_t col, sysarg_t row)
{
charfield_t *field =
chargrid_charfield_at(dev->backbuf, col, row);
draw_char(field, col, row);
}
/** Clear one buffer row.
*
* @param scrbuf Chargrid.
* @param row Row to clear.
*
*/
void chargrid_clear_row(chargrid_t *scrbuf, sysarg_t row)
{
for (sysarg_t col = 0; col < scrbuf->cols; col++) {
charfield_t *field =
chargrid_charfield_at(scrbuf, col, row);
field->ch = 0;
field->attrs = scrbuf->attrs;
field->flags |= CHAR_FLAG_DIRTY;
}
}
/** Store one character to chargrid.
*
* Its position is determined by scrbuf->col
* and scrbuf->row.
*
* @param scrbuf Chargrid.
* @param ch Character to store.
* @param update Update coordinates.
*
* @return Number of rows which have been affected. In usual
* situations this is 1. If the current position was
* updated to a new row, this value is 2.
*
*/
sysarg_t chargrid_putchar(chargrid_t *scrbuf, wchar_t ch, bool update)
{
assert(scrbuf->col < scrbuf->cols);
assert(scrbuf->row < scrbuf->rows);
charfield_t *field =
chargrid_charfield_at(scrbuf, scrbuf->col, scrbuf->row);
field->ch = ch;
field->attrs = scrbuf->attrs;
field->flags |= CHAR_FLAG_DIRTY;
if (update) {
scrbuf->col++;
return chargrid_update_cols(scrbuf);
}
return 1;
}