There are some corner cases in the framebuffer update system that need to be explicitly mentioned.
Signed-off-by: Pierre Ossman <oss...@cendio.se> --- Index: rfbproto.rst =================================================================== --- rfbproto.rst (revision 3809) +++ rfbproto.rst (working copy) @@ -637,6 +637,12 @@ 2 ``U16`` *height* =============== ==================== ========== ======================= +A request for an area that partly falls outside the current framebuffer +must be cropped so that it fits within the framebuffer dimensions. + +Note that an empty area can still solicit a *FramebufferUpdate* even +though that update will only contain pseudo-encodings. + KeyEvent -------- @@ -1108,6 +1114,16 @@ for the format of the data for each encoding and `Pseudo-encodings`_ for the meaning of pseudo-encodings. +Note that a framebuffer update marks a transition from one valid +framebuffer state to another. That means that a single update handles +all received *FramebufferUpdateRequest* up to the point where the +update is sent out. + +However, because there is no strong connection between a +*FramebufferUpdateRequest* and a subsequent *FramebufferUpdate*, a +client that has more than one *FramebufferUpdateRequest* pending at any +given time cannot be sure that it has received all framebuffer updates. + SetColourMapEntries ------------------- -- Pierre Ossman OpenSource-based Thin Client Technology System Developer Telephone: +46-13-21 46 00 Cendio AB Web: http://www.cendio.com
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