[Spice-devel] SPICE_MSG_DISPLAY_COPY_BITS and SPICE_MSG_DISPLAY_DRAW_COPY

[li]

Hi all,
 
when I use mouse to scroll the web page in full screen, I find that spice uses DRAW_COPY and COPY_BITS messages to update the web page in order,
and the area updated by COPY_BITS is covered by DRAW_COPY. so it seems that it is not nessary to use the COPY_BITS to update the area. 
 
In all, I don't know whether the area updated by COPY_BITS is necessary or not, beacause DRAW_COPY will update the whole page. if it is necessary,
is there any one can tell me why spice use both of them to update the page? if not, how can I remove the updation by COPY_BITS, which seems that come
from QXL driver.
 
ps: my environment:
spice-gtk-0.25
spice-0.12.5
 
Thanks,
Stone
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