1 files changed, 46 insertions, 0 deletions
diff --git a/widget/nsBaseScreen.cpp b/widget/nsBaseScreen.cpp
new file mode 100644
index 0000000000..b0730011d0
--- /dev/null
+++ b/widget/nsBaseScreen.cpp
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#define MOZ_FATAL_ASSERTIONS_FOR_THREAD_SAFETY
+
+#include "nsBaseScreen.h"
+
+NS_IMPL_ISUPPORTS(nsBaseScreen, nsIScreen)
+
+nsBaseScreen::nsBaseScreen() = default;
+
+nsBaseScreen::~nsBaseScreen() = default;
+
+NS_IMETHODIMP
+nsBaseScreen::GetRectDisplayPix(int32_t* outLeft, int32_t* outTop,
+                                int32_t* outWidth, int32_t* outHeight) {
+  return GetRect(outLeft, outTop, outWidth, outHeight);
+}
+
+NS_IMETHODIMP
+nsBaseScreen::GetAvailRectDisplayPix(int32_t* outLeft, int32_t* outTop,
+                                     int32_t* outWidth, int32_t* outHeight) {
+  return GetAvailRect(outLeft, outTop, outWidth, outHeight);
+}
+
+NS_IMETHODIMP
+nsBaseScreen::GetContentsScaleFactor(double* aContentsScaleFactor) {
+  *aContentsScaleFactor = 1.0;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseScreen::GetDefaultCSSScaleFactor(double* aScaleFactor) {
+  *aScaleFactor = 1.0;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBaseScreen::GetDpi(float* aDPI) {
+  *aDPI = 96;
+  return NS_OK;
+}