static void qemu_spice_create_update(SimpleSpiceDisplay *ssd)
{
+ static const int blksize = 32;
+ int blocks = (ds_get_width(ssd->ds) + blksize - 1) / blksize;
+ int dirty_top[blocks];
+ int y, yoff, x, xoff, blk, bw;
+ int bpp = ds_get_bytes_per_pixel(ssd->ds);
+ uint8_t *guest, *mirror;
+
if (qemu_spice_rect_is_empty(&ssd->dirty)) {
return;
};
ssd->ds_mirror = g_malloc0(size);
}
- qemu_spice_create_one_update(ssd, &ssd->dirty);
+ for (blk = 0; blk < blocks; blk++) {
+ dirty_top[blk] = -1;
+ }
+
+ guest = ds_get_data(ssd->ds);
+ mirror = ssd->ds_mirror;
+ for (y = ssd->dirty.top; y < ssd->dirty.bottom; y++) {
+ yoff = y * ds_get_linesize(ssd->ds);
+ for (x = ssd->dirty.left; x < ssd->dirty.right; x += blksize) {
+ xoff = x * bpp;
+ blk = x / blksize;
+ bw = MIN(blksize, ssd->dirty.right - x);
+ if (memcmp(guest + yoff + xoff,
+ mirror + yoff + xoff,
+ bw * bpp) == 0) {
+ if (dirty_top[blk] != -1) {
+ QXLRect update = {
+ .top = dirty_top[blk],
+ .bottom = y,
+ .left = x,
+ .right = x + bw,
+ };
+ qemu_spice_create_one_update(ssd, &update);
+ dirty_top[blk] = -1;
+ }
+ } else {
+ if (dirty_top[blk] == -1) {
+ dirty_top[blk] = y;
+ }
+ }
+ }
+ }
+
+ for (x = ssd->dirty.left; x < ssd->dirty.right; x += blksize) {
+ blk = x / blksize;
+ bw = MIN(blksize, ssd->dirty.right - x);
+ if (dirty_top[blk] != -1) {
+ QXLRect update = {
+ .top = dirty_top[blk],
+ .bottom = ssd->dirty.bottom,
+ .left = x,
+ .right = x + bw,
+ };
+ qemu_spice_create_one_update(ssd, &update);
+ dirty_top[blk] = -1;
+ }
+ }
+
memset(&ssd->dirty, 0, sizeof(ssd->dirty));
}