1# Copyright 2014 The Chromium 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# This file contains UI-related build flags. It should theoretically be in the
6# src/ui directory and only things that depend on the ui module should get the
7# definitions.
8#
9# However, today we have many "bad" dependencies on some of these flags from,
10# e.g. base, so they need to be global.
11#
12# See also build/config/features.gni
13
14declare_args() {
15  # Indicates if Ash is enabled. Ash is the Aura Shell which provides a
16  # desktop-like environment for Aura. Requires use_aura = true
17  use_ash = is_win || is_linux
18
19  # Indicates if Ozone is enabled. Ozone is a low-level library layer for Linux
20  # that does not require X11.
21  use_ozone = false
22
23  # Support ChromeOS touchpad gestures with ozone.
24  use_evdev_gestures = false
25
26  # Indicates if Aura is enabled. Aura is a low-level windowing library, sort
27  # of a replacement for GDI or GTK.
28  use_aura = is_win || is_linux
29
30  # XInput2 multitouch support. Zero means disabled, nonzero indicates the
31  # minimum XI2 version. For example, use_xi2_mt=2 means XI2.2 or above.
32  use_xi2_mt = 2
33
34  # True means the UI is built using the "views" framework.
35  toolkit_views = is_win || is_chromeos || use_aura
36}
37
38# Additional dependent variables -----------------------------------------------
39#
40# These variables depend on other variables and can't be set externally.
41
42if (is_linux) {
43  use_cairo = true
44  use_pango = true
45} else {
46  use_cairo = false
47  use_pango = false
48}
49
50# Use GPU accelerated cross process image transport by default on linux builds
51# with the Aura window manager.
52ui_compositor_image_transport = use_aura && is_linux
53
54use_default_render_theme = use_aura || is_linux
55
56# Indicates if the UI toolkit depends on X11.
57use_x11 = is_linux && !use_ozone
58
59use_ozone_evdev = use_ozone
60
61use_glib = is_linux
62
63use_clipboard_aurax11 = is_linux && use_aura && use_x11
64
65use_athena = false
66
67enable_hidpi = is_mac || is_chromeos || is_win
68