Hello, I need to wait for a window to be completely redrawn, and then take a picture of it with XGetImage. This window is not mine, and the only thing I know about it is its ID. How can I tell that the X server has compeletly redrawn the window? I would appreciate your time and advice. Thank you, Irek
XGetImage ensures that all pending rendering has made it out to the screen. So you shouldn't need to do anything extra if the XGetImage is inside the program which is doing the drawing. However, if the XGetImage is in another process from the one doing the drawing, you'll have to establish your own interprocess communication protocol for the app to tell your XGetImage process when it has flushed its final drawing request to the X server. In general, if you want to make sure that the rendering of an arbitrary X request has been written to the frame buffer, you simply need to do an XFlush followed by an XGetImage of one pixel from the window. This is sufficient to ensure that the contents of all rendering queues (including those in the DDX and the hardware itself) have been flushed out to the frame buffer. Irek Szczesniak wrote: > Hello, > > I need to wait for a window to be completely redrawn, and then take a > picture of it with XGetImage. This window is not mine, and the only > thing I know about it is its ID. > > How can I tell that the X server has compeletly redrawn the window? > > I would appreciate your time and advice. > > > Thank you, > Irek(Continue reading)
Thank you for your e-mail! I appreciate your advice. On Tue, 8 Mar 2005, Deron Johnson wrote: > However, if the XGetImage is in another process from the one doing > the drawing, you'll have to establish your own interprocess > communication protocol for the app to tell your XGetImage process > when it has flushed its final drawing request to the X server. I have no way of establishing such a communication. These applications do not know that I want to take pictures of their windows. Modifying the applications and recompiling them is not possible. > In general, if you want to make sure that the rendering of an > arbitrary X request has been written to the frame buffer, you simply > need to do an XFlush followed by an XGetImage of one pixel from the > window. This is sufficient to ensure that the contents of all > rendering queues (including those in the DDX and the hardware > itself) have been flushed out to the frame buffer. Based on what you wrote, I tested this: XMapRaised(dpy, window); XFlush(dpy); image = XGetImage (dpy, window, x, y, 1, 1, AllPlanes, format); image = XGetImage (dpy, window, x, y, width, height, AllPlanes, format); Unfortunately, it does not work as expected, i.e. I get a picture of(Continue reading)
I am running an X server (X.Org v. 6.8.1 on GNU/Linux Fedora Core 3, 2.6.10-1.770_FC3smp, i686) with backing store capability turned on (the "+bs" option used when starting the server). Moreover, I am forcing the default backing store of all windows to be WhenMapped (the "-wm" option used when starting the server). The server is run with this command: /usr/X11R6/bin/X :0 -audit 0 +bs -wm -auth /var/gdm/:0.Xauth vt7 I started several applications, whose windows overlapped. Then I got the window ID's of these applications with: xwininfo -root -children Finally, I used the xwd command (there I passed the ID's) to save the images of the windows. The image of every window contained no overlappings, just as I wanted. Conclusion: the backing store is working. Up to this point things work as expected, but they go wrong when I try to repeat the same process with Xvfb, i.e. the X virtual frame buffer. So I run Xvfb with: /usr/X11R6/bin/Xvfb :1 -audit 0 +bs -wm -auth /var/gdm/:0.Xauth Next, I run the applications and get the ID's. Finally, I get the images with the xwd command. Result: the window images have overlappings. Conclusion: the backing store ain't working! QUESTION: why does Xvfb not use the backing store even though I(Continue reading)
This conf works perfect but i would like to use 3d accelleration and
all the feauters of this cart as much as possible. Can someone modify
my xorg.conf please
SeSection "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
ModulePath "/usr/X11R6/lib/modules"
FontPath "/usr/X11R6/lib/X11/fonts/misc/"
FontPath "/usr/X11R6/lib/X11/fonts/TTF/"
FontPath "/usr/X11R6/lib/X11/fonts/Speedo/"
FontPath "/usr/X11R6/lib/X11/fonts/Type1/"
FontPath "/usr/X11R6/lib/X11/fonts/CID/"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi/"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi/"
EndSection
Section "Module"
Load "dbe"
Load "dri"
Load "extmod"
Load "glx"
Load "record"
Load "xtrap"
(Continue reading)
thx ps what about this ? What are the default settings ? where can i
find more information about this options ?
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "NoAccel" # [<bool>]
#Option "SWcursor" # [<bool>]
#Option "Dac6Bit" # [<bool>]
#Option "Dac8Bit" # [<bool>]
#Option "ForcePCIMode" # [<bool>]
#Option "BusType" # [<str>]
#Option "CPPIOMode" # [<bool>]
#Option "CPusecTimeout" # <i>
#Option "AGPMode" # <i>
#Option "AGPFastWrite" # [<bool>]
#Option "AGPSize" # <i>
#Option "GARTSize" # <i>
#Option "RingSize" # <i>
#Option "BufferSize" # <i>
#Option "EnableDepthMoves" # [<bool>]
#Option "EnablePageFlip" # [<bool>]
#Option "NoBackBuffer" # [<bool>]
#Option "PanelOff" # [<bool>]
#Option "DDCMode" # [<bool>]
#Option "MonitorLayout" # [<str>]
#Option "IgnoreEDID" # [<bool>]
#Option "OverlayOnCRTC2" # [<bool>]
#Option "CloneMode" # [<str>]
(Continue reading)
On Tue, 22 Mar 2005 19:26:28 +0100, Gert Cuykens <gert.cuykens@...> wrote: > thx ps what about this ? What are the default settings ? where can i > find more information about this options ? 'man radeon' > > ### Available Driver options are:- > ### Values: <i>: integer, <f>: float, <bool>: "True"/"False", > ### <string>: "String", <freq>: "<f> Hz/kHz/MHz" > ### [arg]: arg optional > #Option "NoAccel" # [<bool>] > #Option "SWcursor" # [<bool>] > #Option "Dac6Bit" # [<bool>] > #Option "Dac8Bit" # [<bool>] > #Option "ForcePCIMode" # [<bool>] > #Option "BusType" # [<str>] > #Option "CPPIOMode" # [<bool>] > #Option "CPusecTimeout" # <i> > #Option "AGPMode" # <i> > #Option "AGPFastWrite" # [<bool>] > #Option "AGPSize" # <i> > #Option "GARTSize" # <i> > #Option "RingSize" # <i> > #Option "BufferSize" # <i> > #Option "EnableDepthMoves" # [<bool>] > #Option "EnablePageFlip" # [<bool>] > #Option "NoBackBuffer" # [<bool>] > #Option "PanelOff" # [<bool>](Continue reading)
Hi, I have few X applications, started from the command line with identical command line, but each has a different DISPLAY environment variable. Is there a way to get the process id of a process from its window ? Using xlsclients I can get the command line of the application, but since all of them use same command line, I can't find unique process id. Thanks for your help. Yossi
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