widget/WidgetUtils.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=8 et :
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   6  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #ifndef mozilla_WidgetUtils_h
   9 #define mozilla_WidgetUtils_h
  10
  11 #include "nsRect.h"
  12 #include "mozilla/gfx/Matrix.h"
  13
  14 namespace mozilla {
  15
  16 // NB: these must match up with pseudo-enum in nsIScreen.idl.
  17 enum ScreenRotation {
  18   ROTATION_0 = 0,
  19   ROTATION_90,
  20   ROTATION_180,
  21   ROTATION_270,
  22
  23   ROTATION_COUNT
  24 };
  25
  26 gfx::Matrix ComputeTransformForRotation(const nsIntRect& aBounds,
  27                                         ScreenRotation aRotation);
  28
  29 gfx::Matrix ComputeTransformForUnRotation(const nsIntRect& aBounds,
  30                                           ScreenRotation aRotation);
  31
  32 nsIntRect RotateRect(nsIntRect aRect,
  33                      const nsIntRect& aBounds,
  34                      ScreenRotation aRotation);
  35
  36 } // namespace mozilla
  37
  38 #endif // mozilla_WidgetUtils_h