Change Xserver screen through libXrandr. For complex configurations,
all outputs must have corresponding size modes. As a special case, if
the client requests a single screen with an odd size (for example when
adjusting the size of a non-fullscreen vncviewer), find a smaller
suitable mode, and reduce the framebuffer size as well.
For example, if we have earlier disabled an output because it was too
large for the framebuffer, we should prefer this output when
allocating new outputs.
Move the code that turn off unused outputs to the end.
Also, add support for checking the output connection state.
In RandR land, there's a lot of return code confusion. Our wrappers
are using the same return codes as RRCrtcSet, RRScreenSizeSet: 1/TRUE
for success. Fixes:
* vncRandRCreateOutputs did not follow this convention
* A lot of code returned -1 upon failure
* vncRandRDisableOutput returned 0 for already disabled outputs
Move computeScreenLayout/setScreenLayout to unixcommon lib
These two code blocks are not specific to Xvnc/vnc.so, but useful for
x0vncserver as well. RandrGlue.h defines the interface on which
unixcommon depends on.
Pierre Ossman [Fri, 23 Mar 2018 08:30:09 +0000 (09:30 +0100)]
Limit lossless refresh update to safe size
We don't want to waste bandwidth on the lossless refresh if we might
need that bandwidth for a normal update. Try to estimate how much
data we can safely send without interfering.
Pierre Ossman [Wed, 30 Nov 2016 07:03:35 +0000 (08:03 +0100)]
Automatic lossless refresh
Resend pixel perfect copies of areas that were previously sent
using a lossy encoder. This is done when there is no normal update
to send, and no congestion.
Pierre Ossman [Thu, 22 Mar 2018 14:58:54 +0000 (15:58 +0100)]
Respect request area for cursor rendering
We cannot send updates for a cursor that is outside the requested
region, so make sure we track things properly. This also has the nice
side effect of just re-sending the bits needed when the cursor overlaps
a changed part of the framebuffer.
Pierre Ossman [Mon, 26 Mar 2018 12:17:04 +0000 (14:17 +0200)]
Avoid clipboard updates when not focused
We don't want to surprise the user with unexpected clipboard changes
when vncviewer is in the background, and it is both wasteful and
possibly insecure to inform the server of every clipboard update
when the user isn't interacting with it.
Pierre Ossman [Mon, 26 Mar 2018 10:22:47 +0000 (12:22 +0200)]
Replace "frames" with "updates" in stats
The VNC servers aren't great at getting full frames with each update,
so avoid calling it "frames per second" in the statistics as that
can be misleading.
Pierre Ossman [Thu, 8 Mar 2018 13:05:39 +0000 (14:05 +0100)]
Better detection of AltGr on Windows
Try to properly detect the fake CtrlL+AltR sequence Windows sends
when pressing AltGr. This allows us to send more accurate key
events over to the server.
Michal Srb [Fri, 29 Sep 2017 12:47:56 +0000 (14:47 +0200)]
Unset pixel buffer when x0vncserver client disconnects.
In XDesktop::start() we allocate pixel buffer and set it as the backend to the given VNCServer.
In XDesktop::stop() we deallocate the buffer, so we must unset it from the VNCServer as well.
Otherwise the VNCServer could try to access it and crash, for example in deferred update.
Michal Srb [Fri, 29 Sep 2017 12:45:33 +0000 (14:45 +0200)]
VNCServerST: Allow unsetting pixel buffer.
Originally calling VNCServertST::setPixelBuffer(PixelBuffer* pb_) with pb_=0 would do nothing.
With this change pb will be set to 0 and deferred update timer will be stopped.
Pierre Ossman [Thu, 1 Mar 2018 13:11:39 +0000 (14:11 +0100)]
Fix rounding error in pixel down conversion
Simple shifting can give noticable rounding errors if there is a large
difference in the number of bits between the formats. Do the proper
thing via a lookup table, the same way things are done for up conversion.
Brian P. Hinz [Mon, 1 Jan 2018 22:24:20 +0000 (17:24 -0500)]
Fixes for erros in java hextile/zrle decoders
Various errors exposed when connecting to RealVNC servers
on alternative platforms (ARM, SPARC). SSLEngineManager
was also cleaned up but most of the changes are cosmetic.
Similar to 841e9f32d5952d6f16f67294c2da8bf395066a9b but for the
pointer. Fixes a problem where the desktop environment is unresponsive
(to the mouse) after fullscreen exit; Fixes #579.
Pierre Ossman [Thu, 7 Dec 2017 14:16:54 +0000 (15:16 +0100)]
Make VNC extension startup mandatory
No longer tolerate loading the VNC extension but not being able to
initialize it. This avoids a lot of error prone checking to see
if the extension has started fully or not.
Pierre Ossman [Fri, 24 Nov 2017 11:34:28 +0000 (12:34 +0100)]
Stop using CopyRect in WinVNC
It cannot keep itself in sync with the actual screen contents well
enough for CopyRect to work accurately. Graphical glitches could
be seen in some cases.
Pierre Ossman [Thu, 16 Nov 2017 15:44:36 +0000 (16:44 +0100)]
Fix bug where server cursor might disappear
We shouldn't unconditionally remove the server side cursor just
because the client supports client side cursors. We need to also
check that the client fulfills the other criteria for taking over
the cursor.
Pierre Ossman [Thu, 16 Nov 2017 15:43:13 +0000 (16:43 +0100)]
Avoid extra framebuffer update messages
In most cases we will send an update at the end of processing client
messages so these extra calls only slow things down. Server initiated
events still need an explicit call though.
Pierre Ossman [Thu, 16 Nov 2017 15:40:44 +0000 (16:40 +0100)]
Fix for initial client side cursor
Improve the tracking of what cursor we've sent to the client to make
sure the initial cursor is sent properly. We previously tried to infer
this information based on if we've rendered a server side cursor or
not. This logic broke down if things triggered before we've sent the
first update to the client.