ui/ozone/ozone.gni

# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/config/chromecast_build.gni")
import("//build/config/ui.gni")

declare_args() {
  # Select platforms automatically. Turn this off for manual control.
  ozone_auto_platforms = use_ozone

  # This enables memory-mapped access to accelerated graphics buffers via the
  # VGEM ("virtual GEM") driver. This is currently only available on Chrome OS
  # kernels and affects code in the GBM ozone platform.
  # TODO(dshwang): remove this flag when all gbm hardware supports vgem map.
  # crbug.com/519587
  use_vgem_map = false
}

declare_args() {
  # The platform that will be active by default.
  ozone_platform = ""

  # Enable individual platforms.
  ozone_platform_cast = false
  ozone_platform_gbm = false
  ozone_platform_headless = false
  ozone_platform_x11 = false
  ozone_platform_wayland = false

  if (ozone_auto_platforms) {
    # Use headless as the default platform.
    ozone_platform = "headless"
    ozone_platform_headless = true

    if (is_chromecast) {
      # Enable the Cast ozone platform on all A/V Cast builds.
      ozone_platform_cast = true

      # For visual desktop Chromecast builds, override the default "headless"
      # platform with --ozone-platform=x11.
      # TODO(halliwell): Create a libcast_graphics implementation for desktop
      # using X11, and disable this platform.
      if (is_cast_desktop_build && !is_cast_audio_only) {
        ozone_platform_x11 = true
      } else {
        ozone_platform = "cast"
      }
    } else if (is_chromeos) {
      ozone_platform_gbm = true
      ozone_platform_x11 = true
      ozone_platform_wayland = true
    } else if (is_desktop_linux) {
      ozone_platform_wayland = true
      ozone_platform_x11 = true
    }
  }
}

assert(use_ozone || !(ozone_platform_cast || ozone_platform_gbm ||
                          ozone_platform_headless || ozone_platform_x11 ||
                          ozone_platform_wayland),
       "Must set use_ozone to select ozone platforms")