diff options
Diffstat (limited to 'samples/X11/clobberme/clobberme.c')
| -rw-r--r-- | samples/X11/clobberme/clobberme.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/samples/X11/clobberme/clobberme.c b/samples/X11/clobberme/clobberme.c new file mode 100644 index 0000000..ac58dc5 --- /dev/null +++ b/samples/X11/clobberme/clobberme.c @@ -0,0 +1,171 @@ +/*------------------------------------------------------------------------ + * A demonstration of a clobberable X11 window, i.e. a window that will + * assume the contents of whatever was visible above it, without clearing + * or tidying up itself. + * + * (c) 2013 by Wolfgang 'datenwolf' Draxinger + + * License agreement: This source code is provided "as is". You + * can use this source code however you want for your own personal + * use. If you give this source code to anybody else then you must + * leave this message in it. +------------------------------------------------------------------------*/ +#define _GNU_SOURCE + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <math.h> + +#include <sys/types.h> +#include <time.h> + +#include <X11/Xatom.h> +#include <X11/Xutil.h> + +static void fatalError(const char *why) +{ + fprintf(stderr, "%s", why); + exit(0x666); +} + +static int Xscreen; +static Atom del_atom; +static Colormap cmap; +static Display *Xdisplay; +static Visual *Xvisual; +static Window Xroot, window_handle; +static int width, height; + +static Bool WaitForMapNotify(Display *d, XEvent *e, char *arg) +{ + return d && e && arg && (e->type == MapNotify) && (e->xmap.window == *(Window*)arg); +} + +static void createTheWindow() +{ + XEvent event; + int x,y, attr_mask; + XSizeHints hints; + XWMHints *startup_state; + XTextProperty textprop; + XSetWindowAttributes attr = {0,}; + static char *title = "FTB's little OpenGL example - ARGB extension by WXD"; + + Xdisplay = XOpenDisplay(NULL); + if (!Xdisplay) { + fatalError("Couldn't connect to X server\n"); + } + Xscreen = DefaultScreen(Xdisplay); + Xroot = RootWindow(Xdisplay, Xscreen); + Xvisual = DefaultVisual(Xdisplay, Xscreen); + + /* Create a colormap - only needed on some X clients, eg. IRIX */ + cmap = XCreateColormap(Xdisplay, Xroot, Xvisual, AllocNone); + + attr.colormap = cmap; + attr.background_pixmap = None; + attr.border_pixmap = None; + attr.border_pixel = 0; + attr.event_mask = + StructureNotifyMask | + EnterWindowMask | + LeaveWindowMask | + ExposureMask | + ButtonPressMask | + ButtonReleaseMask | + OwnerGrabButtonMask | + KeyPressMask | + KeyReleaseMask; + + attr_mask = 0 + // | CWBackPixmap + | CWColormap + // | CWBorderPixel + | CWEventMask ; + + width = DisplayWidth(Xdisplay, DefaultScreen(Xdisplay))/2; + height = DisplayHeight(Xdisplay, DefaultScreen(Xdisplay))/2; + x=width/2, y=height/2; + + window_handle = XCreateWindow( Xdisplay, + Xroot, + x, y, width, height, + 0, + CopyFromParent, + InputOutput, + Xvisual, + attr_mask, &attr); + + if( !window_handle ) { + fatalError("Couldn't create the window\n"); + } + + textprop.value = (unsigned char*)title; + textprop.encoding = XA_STRING; + textprop.format = 8; + textprop.nitems = strlen(title); + + hints.x = x; + hints.y = y; + hints.width = width; + hints.height = height; + hints.flags = USPosition|USSize; + + startup_state = XAllocWMHints(); + startup_state->initial_state = NormalState; + startup_state->flags = StateHint; + + XSetWMProperties(Xdisplay, window_handle,&textprop, &textprop, + NULL, 0, + &hints, + startup_state, + NULL); + + XFree(startup_state); + + XMapWindow(Xdisplay, window_handle); + XIfEvent(Xdisplay, &event, WaitForMapNotify, (char*)&window_handle); + + if ((del_atom = XInternAtom(Xdisplay, "WM_DELETE_WINDOW", 0)) != None) { + XSetWMProtocols(Xdisplay, window_handle, &del_atom, 1); + } +} + +static int updateTheMessageQueue() +{ + XEvent event; + XConfigureEvent *xc; + + while (XPending(Xdisplay)) + { + XNextEvent(Xdisplay, &event); + switch (event.type) + { + case ClientMessage: + if (event.xclient.data.l[0] == del_atom) + { + return 0; + } + break; + + case ConfigureNotify: + xc = &(event.xconfigure); + width = xc->width; + height = xc->height; + break; + } + } + return 1; +} + +int main(int argc, char *argv[]) +{ + createTheWindow(); + + while (updateTheMessageQueue()) { + } + + return 0; +} + |