window

1 files changed, 88 insertions, 0 deletions

diff --git a/shapes.c b/shapes.c
new file mode 100644
index 0000000..ef6345c
--- /dev/null
+++ b/shapes.c
@@ -0,0 +1,88 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <X11/Xlib.h>
+
+int scr_width, scr_height;
+
+uint64_t x, y, width, height;
+Window window;
+
+#define MIN_WIDTH 10
+#define MIN_HEIGHT 10
+#define MAX_WIDTH (800 - MIN_WIDTH)
+#define MAX_HEIGHT (800 - MIN_HEIGHT)
+
+static uint32_t
+reflect (uint64_t i, uint64_t size)
+{
+    i = i % (size * 2);
+    if (i >= size)
+	i = size * 2 - i - 1;
+
+    return i;
+}
+
+static void
+update_window (Display *dpy)
+{
+    uint32_t real_x, real_y, real_width, real_height;
+
+    real_width = reflect (width, MAX_WIDTH) + MIN_WIDTH;
+    real_height = reflect (height, MAX_HEIGHT) + MIN_HEIGHT;
+
+    real_x = reflect (x, scr_width);
+    real_y = reflect (y, scr_height);
+
+    if (real_x + real_width >= scr_width)
+	real_x = scr_width - real_width;
+    if (real_y + real_height >= scr_height)
+	real_y = scr_height - real_height;
+    
+    XMoveResizeWindow (dpy, window, real_x, real_y,
+		       real_width, real_height);
+
+    x += rand () % 20;
+    width += rand () % 20;
+    y += rand () % 20;
+    height += rand () % 20;
+
+    XSync (dpy, False);
+}
+
+int
+main ()
+{
+    Display *dpy = XOpenDisplay (NULL);
+    XSetWindowAttributes attr;
+
+    attr.override_redirect = True;
+    attr.background_pixel = 0;
+
+    x = 10;
+    y = 10;
+    width = 400;
+    height = 400;
+
+    scr_width = DisplayWidth (dpy, 0);
+    scr_height = DisplayHeight (dpy, 0);
+
+    window = XCreateWindow (
+	dpy, DefaultRootWindow (dpy), x, y, width, height,
+	0, 0,
+	InputOutput, DefaultVisual (dpy, 0),
+	CWOverrideRedirect | CWBackPixel, &attr);
+
+    XMapWindow (dpy, window);
+
+    while (1)
+    {
+	update_window (dpy);
+
+	usleep (10000);
+    }
+
+    XSync (dpy, False);
+
+    sleep (10);
+}