widget/nsBaseScreen.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
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #ifndef nsBaseScreen_h
   9 #define nsBaseScreen_h
  10
  11 #include "mozilla/Attributes.h"
  12 #include "nsIScreen.h"
  13
  14 class nsBaseScreen : public nsIScreen
  15 {
  16 public:
  17   nsBaseScreen();
  18
  19   NS_DECL_ISUPPORTS
  20
  21   // nsIScreen interface
  22
  23   // These simply forward to the device-pixel versions;
  24   // implementations where desktop pixels may not correspond
  25   // to per-screen device pixels must override.
  26   NS_IMETHOD GetRectDisplayPix(int32_t *outLeft,  int32_t *outTop,
  27                                int32_t *outWidth, int32_t *outHeight) override;
  28   NS_IMETHOD GetAvailRectDisplayPix(int32_t *outLeft,  int32_t *outTop,
  29                                     int32_t *outWidth, int32_t *outHeight) override;
  30
  31   NS_IMETHOD GetContentsScaleFactor(double* aContentsScaleFactor) override;
  32
  33   NS_IMETHOD GetDefaultCSSScaleFactor(double* aScaleFactor) override;
  34
  35   NS_IMETHOD GetDpi(float* aDPI) override;
  36
  37 protected:
  38   virtual ~nsBaseScreen();
  39 };
  40
  41 #endif // nsBaseScreen_h