Questions tagged [x11]
X11 is an extensible windowing system for bitmap displays. It forms the foundation of most Unix operating system GUIs.
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Failed to use MTWindow in Docker
I used the following method to open the desktop
xhost '+local:*';
The description of creating a Docker container is as follows:
sudo docker run -dit --privileged --name test3 -v /dev/bus/usb:/deb/bus/...
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X11 forwarding request failed on channel 0 in the CentOS7 after updating openssh [closed]
After updating openssl and openssh, I got trouble with server.
(base) ichan-yeong@ichan-yeong-ui-noteubug LAB_local % ssh -X ID@server
X11 forwarding request failed on channel 0
[chanyeong:~]$ xclock
...
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XQuerytree returns wrong number of child windows
I am trying to get the number of top level windows aka children of the root window in Xlib using XQuerytree.
It is just working fine when only experimenting with basic X utilities such as Xterm or ...
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X11 compositing: how to manually update redirected window
I am trying to do some post-processing (colors manipulation, sharpening, blurring etc) of an arbitrary application window. I am using the Composite extension to get the content as an off-screen pixmap,...
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Why xcb_poly_segment doesn't draw to the pixmap?
I'm trying to make a simple xcb program to learn the basics and hopefully use it in another projects, but i encountered a strange problem. Having created a pixmap i can draw to it with the ...
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How do I get XTest.h on Ubuntu System? [duplicate]
I am having issues compiling a project. I believe I need to include the XTest.h file but I don't have in my X11 directory.
This is a side project to help me learn how to manage dependencies, build, ...
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Unable to run a GUI program with Ubuntu [duplicate]
When compiling one GUI program, I get the following error:
Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set,
but this program performed an operation ...
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Accessing X11 window pixel data over shared memory
I am writing a program in which I need to access a X11 window's pixel data as efficiently as possible, ideally over shared memory, without needing to make XCB calls every time I want to refresh the ...
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Weird behaviour of X11 window opened via ProcessBuilder [closed]
I am on Ubuntu 20.04 and java se 17. I have a java application that uses a ProcessBuilder to start a subprocess. The subprocess (running R code) launches a X11 window and plots things in it. This X11 ...
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X11/Xlib - how to intercept minimizing/restoring a window
I can check if a window is minimized when handling PropertyNotify event using _NET_WM_STATE_HIDDEN atom. Here is an example. That is too late in my case. I would like to intercept minimize/restore ...
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Vulkan on X11 error resizing windows, handling VK_ERROR_INITIALIZATION_FAILED
When I resize a window, or maximize or restore it, sometimes (like 1/50 of the times) I get a VK_ERROR_INITIALIZATION_FAILED error when recreating the swapchain with vkCreateSwapchainKHR. I gather ...
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Cypress failed test screenshot are smaller when running inside docker container, any fix?
I have set my test to viewportWidth: 1920 and viewportHeight: 1080. When running locally, if a test fails, the screenshot captures the entire window.
However, when I run it in Docker (cypress/browser ...
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How to notify the file name when copying or moving a file using drag an drop on linux
i would like to implement a functionality that when moving a file from one directory to another by dragging and dropping ,i could get the name of the file.i want to know if there is any way to ...
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X11 Pixels buffer drawing. Pixmap vs XImage [duplicate]
I'm learning the approaches to draw a buffer of pixels on window using X11 API. I found that Pixelmap and XImage both can be used for this purpose. What is the difference between Pixmap and XImage&...
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Get access to SDL texture pixels
Is there anyway (besides the documented slow method) to get access to the texture pixels from an SDL2 texture? SDL_RenderReadPixels says Warning: this is a very slow method and should not be used ...
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