1 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <gflags/gflags.h>
6 #include <stdio.h>
7
8 #include "base/logging.h"
9
10 #include "glinterface.h"
11 #include "main.h"
12 #include "xlib_window.h"
13
14
15 Display *g_xlib_display = NULL;
16 Window g_xlib_window = 0;
17
18 GLint g_width = WINDOW_WIDTH;
19 GLint g_height = WINDOW_HEIGHT;
20 DEFINE_bool(override_redirect, true, "Use an override redirect window");
21
22
XlibInit()23 bool XlibInit() {
24 // Prevent multiple initializations.
25 if (g_xlib_window)
26 return true;
27
28 g_xlib_display = XOpenDisplay(0);
29 if (!g_xlib_display) {
30 printf("# Error: in xlib_window.cc::XlibInit() could not open "
31 "default display.\n");
32 return false;
33 }
34
35 int screen = DefaultScreen(g_xlib_display);
36 Window root_window = RootWindow(g_xlib_display, screen);
37
38 XWindowAttributes attributes;
39 XGetWindowAttributes(g_xlib_display, root_window, &attributes);
40
41 g_width = g_width == -1 ? attributes.width : g_width;
42 g_height = g_height == -1 ? attributes.height : g_height;
43 XVisualInfo* xlib_visinfo = g_main_gl_interface->GetXVisual();
44
45 unsigned long mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask |
46 CWOverrideRedirect;
47 XSetWindowAttributes attr;
48 attr.background_pixel = 0;
49 attr.border_pixel = 0;
50 attr.colormap = XCreateColormap(g_xlib_display, root_window,
51 xlib_visinfo->visual, AllocNone);
52 attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
53 attr.override_redirect = FLAGS_override_redirect ? True : False;
54 g_xlib_window = XCreateWindow(g_xlib_display, root_window,
55 0, 0, g_width, g_height, 0,
56 xlib_visinfo->depth, InputOutput,
57 xlib_visinfo->visual, mask, &attr);
58
59 XMapWindow(g_xlib_display, g_xlib_window);
60 XSync(g_xlib_display, True);
61
62 XGetWindowAttributes(g_xlib_display, g_xlib_window, &attributes);
63 g_width = attributes.width;
64 g_height = attributes.height;
65
66 XFree(xlib_visinfo);
67
68 return true;
69 }
70