void tb_present(void)
{
unsigned int x,y;
struct tb_cell *back, *front;
/* invalidate cursor position */
lastx = LAST_COORD_INIT;
lasty = LAST_COORD_INIT;
if (buffer_size_change_request) {
update_size();
buffer_size_change_request = 0;
}
for (y = 0; y < front_buffer.height; ++y) {
for (x = 0; x < front_buffer.width; ++x) {
back = &CELL(&back_buffer, x, y);
front = &CELL(&front_buffer, x, y);
if (memcmp(back, front, sizeof(struct tb_cell)) == 0)
continue;
send_attr(back->fg, back->bg);
send_char(x, y, back->ch);
memcpy(front, back, sizeof(struct tb_cell));
}
}
if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y))
write_cursor(cursor_x, cursor_y);
memstream_flush(&write_buffer);
}
static void send_clear(void)
{
send_attr(foreground, background);
memstream_puts(&write_buffer, funcs[T_CLEAR_SCREEN]);
if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y))
write_cursor(cursor_x, cursor_y);
memstream_flush(&write_buffer);
/* we need to invalidate cursor position too and these two vars are
* used only for simple cursor positioning optimization, cursor
* actually may be in the correct place, but we simply discard
* optimization once and it gives us simple solution for the case when
* cursor moved */
lastx = LAST_COORD_INIT;
lasty = LAST_COORD_INIT;
}
static void send_clear()
{
send_attr(foreground, background);
fputs(funcs[T_CLEAR_SCREEN], out);
if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y))
fprintf(out, funcs[T_MOVE_CURSOR], cursor_y+1, cursor_x+1);
fflush(out);
/* we need to invalidate cursor position too and these two vars are
* used only for simple cursor positioning optimization, cursor
* actually may be in the correct place, but we simply discard
* optimization once and it gives us simple solution for the case when
* cursor moved */
lastx = LAST_COORD_INIT;
lasty = LAST_COORD_INIT;
}
void tb_present(void)
{
int x,y,w,i;
struct tb_cell *back, *front;
/* invalidate cursor position */
lastx = LAST_COORD_INIT;
lasty = LAST_COORD_INIT;
if (buffer_size_change_request) {
update_size();
buffer_size_change_request = 0;
}
for (y = 0; y < front_buffer.height; ++y) {
for (x = 0; x < front_buffer.width; ) {
back = &CELL(&back_buffer, x, y);
front = &CELL(&front_buffer, x, y);
w = wcwidth(back->ch);
if (w < 1) w = 1;
if (memcmp(back, front, sizeof(struct tb_cell)) == 0) {
x += w;
continue;
}
memcpy(front, back, sizeof(struct tb_cell));
send_attr(back->fg, back->bg);
if (w > 1 && x >= front_buffer.width - (w - 1)) {
// Not enough room for wide ch, so send spaces
for (i = x; i < front_buffer.width; ++i) {
send_char(i, y, ' ');
}
} else {
send_char(x, y, back->ch);
for (i = 1; i < w; ++i) {
front = &CELL(&front_buffer, x + i, y);
front->ch = 0;
front->fg = back->fg;
front->bg = back->bg;
}
}
x += w;
}
}
if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y))
write_cursor(cursor_x, cursor_y);
bytebuffer_flush(&output_buffer, inout);
}
static int process_ver_info(struct vio_driver_state *vio,
struct vio_ver_info *pkt)
{
struct vio_version *vap;
int err;
viodbg(HS, "GOT VERSION INFO maj[%u] min[%u] devclass[%u]\n",
pkt->major, pkt->minor, pkt->dev_class);
if (vio->hs_state != VIO_HS_INVALID) {
/* XXX Perhaps invoke start_handshake? XXX */
memset(&vio->ver, 0, sizeof(vio->ver));
vio->hs_state = VIO_HS_INVALID;
}
vap = find_by_major(vio, pkt->major);
vio->_peer_sid = pkt->tag.sid;
if (!vap) {
pkt->tag.stype = VIO_SUBTYPE_NACK;
pkt->major = 0;
pkt->minor = 0;
viodbg(HS, "SEND VERSION NACK maj[0] min[0]\n");
err = send_ctrl(vio, &pkt->tag, sizeof(*pkt));
} else if (vap->major != pkt->major) {
pkt->tag.stype = VIO_SUBTYPE_NACK;
pkt->major = vap->major;
pkt->minor = vap->minor;
viodbg(HS, "SEND VERSION NACK maj[%u] min[%u]\n",
pkt->major, pkt->minor);
err = send_ctrl(vio, &pkt->tag, sizeof(*pkt));
} else {
struct vio_version ver = {
.major = pkt->major,
.minor = pkt->minor,
};
if (ver.minor > vap->minor)
ver.minor = vap->minor;
pkt->minor = ver.minor;
pkt->tag.stype = VIO_SUBTYPE_ACK;
viodbg(HS, "SEND VERSION ACK maj[%u] min[%u]\n",
pkt->major, pkt->minor);
err = send_ctrl(vio, &pkt->tag, sizeof(*pkt));
if (err > 0) {
vio->ver = ver;
vio->hs_state = VIO_HS_GOTVERS;
}
}
if (err < 0)
return handshake_failure(vio);
return 0;
}
static int process_ver_ack(struct vio_driver_state *vio,
struct vio_ver_info *pkt)
{
viodbg(HS, "GOT VERSION ACK maj[%u] min[%u] devclass[%u]\n",
pkt->major, pkt->minor, pkt->dev_class);
if (vio->hs_state & VIO_HS_GOTVERS) {
if (vio->ver.major != pkt->major ||
vio->ver.minor != pkt->minor) {
pkt->tag.stype = VIO_SUBTYPE_NACK;
(void) send_ctrl(vio, &pkt->tag, sizeof(*pkt));
return handshake_failure(vio);
}
} else {
vio->ver.major = pkt->major;
vio->ver.minor = pkt->minor;
vio->hs_state = VIO_HS_GOTVERS;
}
switch (vio->dev_class) {
case VDEV_NETWORK:
case VDEV_DISK:
if (send_attr(vio) < 0)
return handshake_failure(vio);
break;
default:
break;
}
return 0;
}
