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vnc: fix copyrect screen corruption 

When sending a copyrect command to the vnc client, we must also update
the local server surface.  Otherwise the server's and the client's idea
of the screen content run out of sync and screen updates don't work
correctly.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-07-27 17:10:48 +02:00 committed by Anthony Liguori
parent 85c2c7359b
commit 3e28c9adf4
1 changed files with 22 additions and 0 deletions
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22
vnc.c
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@ -654,6 +654,11 @@ static void send_framebuffer_update(VncState *vs, int x, int y, int w, int h)
static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, int w, int h)
{
uint8_t *src_row;
uint8_t *dst_row;
int y,pitch,depth;
/* send bitblit op to the vnc client */
vnc_write_u8(vs, 0); /* msg id */
vnc_write_u8(vs, 0);
vnc_write_u16(vs, 1); /* number of rects */
@ -661,6 +666,23 @@ static void vnc_copy(VncState *vs, int src_x, int src_y, int dst_x, int dst_y, i
vnc_write_u16(vs, src_x);
vnc_write_u16(vs, src_y);
vnc_flush(vs);
/* do bitblit op on the local surface too */
pitch = ds_get_linesize(vs->ds);
depth = ds_get_bytes_per_pixel(vs->ds);
src_row = vs->server.ds->data + pitch * src_y + depth * src_x;
dst_row = vs->server.ds->data + pitch * dst_y + depth * dst_x;
if (dst_y > src_y) {
/* copy backwards */
src_row += pitch * (h-1);
dst_row += pitch * (h-1);
pitch = -pitch;
}
for (y = 0; y < h; y++) {
memmove(dst_row, src_row, w * depth);
src_row += pitch;
dst_row += pitch;
}
}
static void vnc_dpy_copy(DisplayState *ds, int src_x, int src_y, int dst_x, int dst_y, int w, int h)