From 987f70c8e9b1bab87647d4ed20df79900d6c0c9e Mon Sep 17 00:00:00 2001
From: Wolfgang Draxinger <Wolfgang.Draxinger@draxit.de>
Date: Sat, 14 Sep 2013 15:59:51 +0200
Subject: X11 clobberable window added

---
 samples/X11/clobberme/clobberme.c | 171 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 samples/X11/clobberme/clobberme.c

(limited to 'samples/X11/clobberme/clobberme.c')

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;
+}
+
-- 
cgit v1.2.3