widget/headless/HeadlessScreenHelper.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "HeadlessScreenHelper.h"
   8
   9 #include "prenv.h"
  10 #include "mozilla/dom/DOMTypes.h"
  11 #include "mozilla/RefPtr.h"
  12 #include "nsTArray.h"
  13
  14 namespace mozilla {
  15 namespace widget {
  16
  17 /* static */
  18 LayoutDeviceIntRect HeadlessScreenHelper::GetScreenRect() {
  19   char* ev = PR_GetEnv("MOZ_HEADLESS_WIDTH");
  20   int width = 1366;
  21   if (ev) {
  22     width = atoi(ev);
  23   }
  24   ev = PR_GetEnv("MOZ_HEADLESS_HEIGHT");
  25   int height = 768;
  26   if (ev) {
  27     height = atoi(ev);
  28   }
  29   return LayoutDeviceIntRect(0, 0, width, height);
  30 }
  31
  32 HeadlessScreenHelper::HeadlessScreenHelper() {
  33   AutoTArray<RefPtr<Screen>, 1> screenList;
  34   LayoutDeviceIntRect rect = GetScreenRect();
  35   auto ret = MakeRefPtr<Screen>(
  36       rect, rect, 24, 24, 0, DesktopToLayoutDeviceScale(),
  37       CSSToLayoutDeviceScale(), 96.0f, Screen::IsPseudoDisplay::No);
  38   screenList.AppendElement(ret.forget());
  39   ScreenManager::Refresh(std::move(screenList));
  40 }
  41
  42 }  // namespace widget
  43 }  // namespace mozilla