xcb

I am migrating some code of CYBOI from Xlib to XCB. CYBOI uses a couple of threads for different communication channels like: serial_port, terminal, socket, x_window_system. However, it uses these threads only for signal/event/data detection; the actual receiving and sending is done in the main thread, in order to avoid any multi-threading conflicts of address space. For the x_window_system channel, I previously detected events in a thread: int n = XEventsQueued(display, QueuedAfterReading); Upon detection of an event, an "interrupt flag" was set. Afterwards, the main thread was reading the

I try to learn how to use shared memory pixmaps in the xcb library. Did any of you have experience with this and want to share example codes and/or information? This would be very helpful. Thanks After some research I found out how to use shared memory pixmaps in xcb. Here is my testcode: #include <stdlib.h> #include <stdio.h> #include <sys/ipc.h> #include <sys/shm.h> #include <xcb/xcb.h> #include <xcb/shm.h> #include <xcb/xcb_image.h> #define WID 512 #define HEI 512 int main(){ xcb_connection_t* connection; xcb_window_t window; xcb_screen_t* screen; xcb_gcontext_t gcontext; xcb_generic_event

I want to create OpenGL Context only with XCB without GLX and Xlib. Could you tell me that might be happened. Thanks a lot. I want to create OpenGL Context only with XCB without GLX and Xlib. You can't. Period. You need GLX, because that's how the X11 does OpenGL. And GLX is written against Xlib. The best you could do is use the Xcb GLX module to implement a purely indirect GLX context; limits you to OpenGL-2.1 though and everything has to pass through the X11 server, instead of having a direct context that talks directly to the GPU. 来源： https://stackoverflow.com/questions/32756336/create

I'm making a little application that needs to know how long the user has been idle — as in, not using a keyboard or a mouse. Both XCB and Xlib promise to give me idle time through their respective screensaver extensions. Here is where I get idle time with XCB: #include <stdlib.h> #include <xcb/xcb.h> #include <xcb/screensaver.h> static xcb_connection_t * connection; static xcb_screen_t * screen; /** * Connects to the X server (via xcb) and gets the screen */ void magic_begin () { connection = xcb_connect (NULL, NULL); screen = xcb_setup_roots_iterator (xcb_get_setup (connection)).data; } /** *

I'm trying to figure what keys are handled by: XCB_MOD_MASK_1 XCB_MOD_MASK_2 XCB_MOD_MASK_3 XCB_MOD_MASK_4 XCB_MOD_MASK_5 in xcb, for XCB_MOD_MASK_1 it seems to be Alt (i'm correct?), but for others button i cannot find the mapping anywhere (i tried to google them before posting, but with no success). So what are the usual key associated to these masks? Usually Mask1 is Alt or Meta, Mask2 is Num lock, Mask3 is AltGr, Mask4 is Win, and Mask5 is Scroll lock, but this varies between X implementations and/or keyboard models. Source: my own computer running X11, and various bits and pieces of code