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Added signal handling if the user terminates the program

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This commit is contained in:
Hynak 2022-02-25 14:38:03 -05:00
parent 6eaea71086
commit e56f128592
1 changed files with 32 additions and 0 deletions
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32
main.cpp
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@ -8,8 +8,12 @@
#include <GL/glew.h>
#include <GL/glx.h>
#include <filesystem>
#include <csignal>
#include "GLFW/glfw3.h"
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include "WallpaperEngine/Core/CProject.h"
#include "WallpaperEngine/Render/CWallpaper.h"
#include "WallpaperEngine/Render/CContext.h"
@ -54,6 +58,26 @@ std::string stringPathFixes(const std::string& s)
return std::move (str);
}
void free_display_wallpaper(int sig)
{
Display* display = XOpenDisplay (nullptr);
Window root = DefaultRootWindow(display);
// create a blank pm to reset compositors values, compositors will render as a blank X window.
Pixmap pm = XCreatePixmap(display, root, 1, 1, 1);
Atom prop_root = XInternAtom(display, "_XROOTPMAP_ID", False);
Atom prop_esetroot = XInternAtom(display, "ESETROOT_PMAP_ID", False);
XChangeProperty(display, root, prop_root, XA_PIXMAP, 32, PropModeReplace, (unsigned char *) &pm, 1);
XChangeProperty(display, root, prop_esetroot, XA_PIXMAP, 32, PropModeReplace, (unsigned char *) &pm, 1);
XFreePixmap(display, pm);
// set background to black. Only needed if no compositors are running
XSetWindowBackground(display, root, 0);
// sync changes before exiting
XClearWindow(display, root);
XFlush(display);
XCloseDisplay(display);
exit(sig);
}
int main (int argc, char* argv[])
{
std::vector <std::string> screens;
@ -145,6 +169,14 @@ int main (int argc, char* argv[])
// ensure the path has a trailing slash
// Attach signals for unexpected killing of program by user. We need to reset the
// screen otherwise the background will remain the last frame on sigterm or sigint.
if (!screens.empty())
{
std::signal(SIGINT, free_display_wallpaper);
std::signal(SIGTERM, free_display_wallpaper);
}
// first of all, initialize the window
if (glfwInit () == GLFW_FALSE)
{