#define RFB_BUF_SIZE 512
-#define SCREEN_CHUNKS_X 4
+#define SCREEN_CHUNKS_X 8
#define SCREEN_CHUNKS_Y 8
struct pixel_format {
enum {
SST_IDLE,
- SST_NEEDS_UPDATE,
- SST_SENDING
+ SST_HEADER,
+ SST_DATA
} send_state;
uint32_t checksums[SCREEN_CHUNKS_X][SCREEN_CHUNKS_Y];
uint32_t chunk_height;
uint32_t chunk_lindex;
+
+ uint32_t chunk_actually_sent;
};
static struct server_init_message server_info;
}
}
+static int advance_chunk(struct rfb_state *state) {
+
+ state->chunk_xnum += 1;
+
+ if (state->chunk_xnum == SCREEN_CHUNKS_X) {
+ state->chunk_ynum += 1;
+ state->chunk_xnum = 0;
+ }
+
+ if (state->chunk_ynum == SCREEN_CHUNKS_Y) {
+ state->chunk_ynum = 0;
+ state->send_state = SST_IDLE;
+ if (!(state->chunk_actually_sent))
+ state->update_requested = 1;
+ return 1;
+ }
+
+ return 0;
+}
+
static void send_fsm(struct tcp_pcb *pcb, struct rfb_state *state) {
struct update_header hdr;
int lines_left;
- char * lptr;
+ unsigned char * lptr;
uint32_t checksum;
int totaldim;
err_t err;
- switch (state->send_state) {
- case SST_IDLE:
- /* Nothing to do */
- if (state->update_requested) {
- outputf("RFB send: update requested");
- state->update_requested = 0;
- state->send_state = SST_NEEDS_UPDATE;
- } else {
- break;
- }
-
- /* FALL THROUGH to SST_NEEDS_UPDATE */
+ while(1) {
- case SST_NEEDS_UPDATE:
+ switch (state->send_state) {
- state->chunk_xnum = 0;
- state->chunk_ynum = 0;
- state->chunk_width = 0;
- state->chunk_height = 0;
- state->chunk_lindex = 0;
- state->send_state = SST_SENDING;
+ case SST_IDLE:
+ /* Nothing to do */
- /* FALL THROUGH to SST_SENDING */
+ if (state->update_requested) {
+ outputf("RFB send: update requested");
+ state->update_requested = 0;
+ state->chunk_actually_sent = 0;
+ state->send_state = SST_HEADER;
+ } else {
+ return;
+ }
+
+ /* FALL THROUGH to SST_HEADER */
+
+ case SST_HEADER:
+
+ /* Calculate the width and height for this chunk, remembering
+ * that if SCREEN_CHUNKS_[XY] do not evenly divide the width and
+ * height, we may need to have shorter chunks at the edge of
+ * the screen. */
+
+ state->chunk_width = fb->curmode.xres / SCREEN_CHUNKS_X;
+ if (fb->curmode.xres % SCREEN_CHUNKS_X != 0)
+ state->chunk_width += 1;
+ state->chunk_xpos = state->chunk_width * state->chunk_xnum;
+ totaldim = state->chunk_width * (state->chunk_xnum + 1);
+ if (totaldim > fb->curmode.xres) {
+ state->chunk_width -= (totaldim - fb->curmode.xres);
+ }
- case SST_SENDING:
+ state->chunk_height = fb->curmode.yres / SCREEN_CHUNKS_Y;
+ if (fb->curmode.yres % SCREEN_CHUNKS_Y != 0)
+ state->chunk_height += 1;
+ state->chunk_ypos = state->chunk_height
+ * state->chunk_ynum;
+ totaldim = state->chunk_height * (state->chunk_ynum + 1);
+ if (totaldim > fb->curmode.yres) {
+ state->chunk_height -= (totaldim - fb->curmode.yres);
+ }
- while (1) {
- lines_left = state->chunk_height - state->chunk_lindex;
+ outputf("rfb send: (%d [%d], %d [%d]) %d x %d",
+ state->chunk_xnum, state->chunk_xpos,
+ state->chunk_ynum, state->chunk_ypos,
+ state->chunk_width, state->chunk_height);
+
+ /* Do we _actually_ need to send this chunk? */
+ if (fb->checksum_rect) {
+ checksum = fb->checksum_rect(state->chunk_xpos, state->chunk_ypos,
+ state->chunk_width, state->chunk_height);
+
+ if (checksum == state->checksums[state->chunk_xnum][state->chunk_ynum]) {
+ outputf("!!!!!!! SKIPPING: %08x", checksum);
+ if (advance_chunk(state))
+ return;
+ continue;
+ } else {
+ state->checksums[state->chunk_xnum][state->chunk_ynum] = checksum;
+ }
+ }
- if (lines_left == 0) {
- /* Advance to the next chunk if necessary. If
- * state->chunk_height is zero, then we are
- * arriving here for the first time from
- * SST_NEEDS_UPDATE. */
+ outputf("actually sent");
+ state->chunk_actually_sent = 1;
- if (state->chunk_height != 0) {
- state->chunk_xnum += 1;
- }
+ /* Send a header */
+ hdr.msgtype = 0;
+ state->chunk_lindex = 0;
+ hdr.nrects = htons(1);
+ hdr.xpos = htons(state->chunk_xpos);
+ hdr.ypos = htons(state->chunk_ypos);
+ hdr.width = htons(state->chunk_width);
+ hdr.height= htons(state->chunk_height);
+ hdr.enctype = htonl(0);
+ lines_left = state->chunk_height;
- if (state->chunk_xnum == SCREEN_CHUNKS_X) {
- state->chunk_ynum += 1;
- state->chunk_xnum = 0;
- }
+ err = tcp_write(pcb, &hdr, sizeof(hdr), TCP_WRITE_FLAG_COPY);
- if (state->chunk_ynum == SCREEN_CHUNKS_Y) {
- state->send_state = SST_IDLE;
- outputf("RFB: Screen update done! %d", state->update_requested);
- break;
- }
+ if (err != ERR_OK) {
+ if (err != ERR_MEM)
+ outputf("RFB: header send error %d", err);
- /* Calculate the width and height for this chunk, remembering
- * that if SCREEN_CHUNKS_[XY] do not evenly divide the width and
- * height, we may need to have shorter chunks at the edge of
- * the screen. */
-
- state->chunk_width = fb->curmode.xres / SCREEN_CHUNKS_X;
- if (fb->curmode.xres % SCREEN_CHUNKS_X != 0)
- state->chunk_width += 1;
- state->chunk_xpos = state->chunk_width * state->chunk_xnum;
- totaldim = state->chunk_width * (state->chunk_xnum + 1);
- if (totaldim > fb->curmode.xres) {
- state->chunk_width -= (totaldim - fb->curmode.xres);
- }
+ /* Try again later. */
+ return;
+ }
- state->chunk_height = fb->curmode.yres / SCREEN_CHUNKS_Y;
- if (fb->curmode.yres % SCREEN_CHUNKS_Y != 0)
- state->chunk_height += 1;
- state->chunk_ypos = state->chunk_height
- * state->chunk_ynum;
- totaldim = state->chunk_height * (state->chunk_ynum + 1);
- if (totaldim > fb->curmode.yres) {
- state->chunk_height -= (totaldim - fb->curmode.yres);
- }
+ state->send_state = SST_DATA;
- if (fb->checksum_rect) {
- checksum = fb->checksum_rect(state->chunk_xpos, state->chunk_ypos,
- state->chunk_width, state->chunk_height);
+ /* FALL THROUGH to SST_DATA */
- if (checksum == state->checksums[state->chunk_xnum][state->chunk_ynum]) {
- state->chunk_lindex = state->chunk_height;
- continue;
- } else {
- state->checksums[state->chunk_xnum][state->chunk_ynum] = checksum;
- }
- }
-/*
- outputf("RFB send: sending header");
-*/
- /* Send a header */
- hdr.msgtype = 0;
- state->chunk_lindex = 0;
- hdr.nrects = htons(1);
- hdr.xpos = htons(state->chunk_xpos);
- hdr.ypos = htons(state->chunk_ypos);
- hdr.width = htons(state->chunk_width);
- hdr.height= htons(state->chunk_height);
- hdr.enctype = htonl(0);
- lines_left = state->chunk_height;
-
- err = tcp_write(pcb, &hdr, sizeof(hdr), TCP_WRITE_FLAG_COPY);
-
- if (err != ERR_OK) {
- if (err != ERR_MEM)
- outputf("RFB: header send error %d", err);
-
- /* Crap. Reset chunk_height to 0 so that next time around,
- * we'll recalculate this chunk (not advance) and try to
- * send the header again.
- */
- state->chunk_height = 0;
- }
- }
+ case SST_DATA:
- do {
- lptr = fb->fbaddr
- + (fb->curmode.xres * fb->curmode.bytestride
- * (state->chunk_ypos + state->chunk_lindex))
- + (state->chunk_xpos * fb->curmode.bytestride);
+ lines_left = state->chunk_height - state->chunk_lindex;
- /* The network card can't DMA from video RAM,
- * so use TCP_WRITE_FLAG_COPY. */
- err = tcp_write(pcb, lptr,
- fb->curmode.bytestride * state->chunk_width,
- TCP_WRITE_FLAG_COPY);
+ if (lines_left == 0) {
+ state->send_state = SST_HEADER;
+ if (advance_chunk(state))
+ return;
+ break;
+ }
- if (err == ERR_OK) {
- state->chunk_lindex += 1;
- }
+ lptr = fb->fbaddr
+ + (fb->curmode.xres * fb->curmode.bytestride
+ * (state->chunk_ypos + state->chunk_lindex))
+ + (state->chunk_xpos * fb->curmode.bytestride);
- } while (err == ERR_OK && state->chunk_lindex < state->chunk_height);
+ /* The network card can't DMA from video RAM,
+ * so use TCP_WRITE_FLAG_COPY. */
+ err = tcp_write(pcb, lptr,
+ fb->curmode.bytestride * state->chunk_width, TCP_WRITE_FLAG_COPY);
- if (err != ERR_OK) {
+ if (err == ERR_OK) {
+ state->chunk_lindex += 1;
+ } else {
if (err != ERR_MEM)
outputf("RFB: send error %d", err);
- break;
+ return;
}
if (tcp_sndbuf(pcb) == 0) {
- break;
+ return;
}
}
-
- break;
}
if (tcp_output(pcb) != ERR_OK)
static err_t rfb_poll(void *arg, struct tcp_pcb *pcb) {
struct rfb_state *state = arg;
- state->update_requested = 1;
send_fsm(pcb, state);
/*
stats_display();
(struct text_event_pkt *)state->data;
if (state->writepos < sizeof(struct text_event_pkt)
- + pkt->length)
+ + pkt->length)
return NEEDMORE;
/* XXX stub */
state->readpos += sizeof(struct text_event_pkt)
- + pkt->length;
+ + pkt->length;
return OK;
default:
}
static err_t rfb_recv(void *arg, struct tcp_pcb *pcb,
- struct pbuf *p, err_t err) {
+ struct pbuf *p, err_t err) {
struct rfb_state *state = arg;
if (state == NULL)
return ERR_OK;
} else {
memmove(state->data,
- state->data + state->readpos,
- state->writepos - state->readpos);
+ state->data + state->readpos,
+ state->writepos - state->readpos);
}
break;
case FAIL:
state->writepos = 0;
state->update_requested = 0;
state->send_state = SST_IDLE;
+ memset(state->checksums, 0, sizeof(state->checksums));
/* XXX: update_server_info() should be called from the 64ms timer, and deal
* with screen resizes appropriately. */
git.joshuawise.com / netwatch.git / commitdiff