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 14 declare_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 42 if (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. 52 ui_compositor_image_transport = use_aura && is_linux 53 54 use_default_render_theme = use_aura || is_linux 55 56 # Indicates if the UI toolkit depends on X11. 57 use_x11 = is_linux && !use_ozone 58 59 use_ozone_evdev = use_ozone 60 61 use_glib = is_linux 62 63 use_clipboard_aurax11 = is_linux && use_aura && use_x11 64 65 use_athena = false 66 67 enable_hidpi = is_mac || is_chromeos || is_win 68
