1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
// from http://en.wikipedia.org/wiki/Shape_extension
// gcc -o xhole xhole.c -lX11 -lXext
/*
xhole.c
A sample application using the shape extension.
Creates a window with a hole in the middle. Works
with twm, fvwm, and mwm, but kde refuses to add
a title bar to it.
*/
#include <stdlib.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/extensions/shape.h>
int main() {
Display *d;
int s;
Window w;
Pixmap p;
GC gw, gp;
XEvent e;
int x, y;
/* open connection with the server */
d=XOpenDisplay(NULL);
if(d==NULL) {
printf("Cannot open display\n");
exit(1);
}
s=DefaultScreen(d);
gw=DefaultGC(d, s);
/* create window, select events, map */
w=XCreateSimpleWindow(d, RootWindow(d, s), 10, 10, 300, 200, 1,
BlackPixel(d, s), WhitePixel(d, s));
XSelectInput(d, w, ExposureMask | KeyPressMask | ButtonPressMask);
XStoreName(d, w, "Hole");
XMapWindow(d, w);
/* create the pixmap that specifies the shape */
p=XCreatePixmap(d, w, 400, 300, 1);
gp=XCreateGC(d, p, 0, NULL);
XSetForeground(d, gp, WhitePixel(d, s));
XFillRectangle(d, p, gp, 0, 0, 400, 300);
XSetForeground(d, gp, BlackPixel(d, s));
XFillArc(d, p, gp, 120, 100, 100, 100, 0, 360*64);
/* set the pixmap as the new window mask;
the pixmap is slightly larger than the window
to allow for the window border and title bar
(as added by the window manager) to be visible */
XShapeCombineMask(d, w, ShapeBounding, -20, -50, p, ShapeSet);
/* event polling loop */
while(1) {
XNextEvent(d, &e);
/* draw or redraw the window */
if(e.type==Expose) {
/* not the correct way of drawing text... */
for(y=10; y<=210; y+=11)
for(x=0; x<300; x+=25)
XDrawString(d, w, gw, x, y, "test", 4);
}
/* exit on button press */
if(e.type==ButtonPress)
break;
}
/* close connection to display */
XCloseDisplay(d);
return 0;
}
|
