ui/compositor/dip_util.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_COMPOSITOR_DIP_UTIL_H_
   6 #define UI_COMPOSITOR_DIP_UTIL_H_
   7
   8 #include "ui/compositor/compositor_export.h"
   9 #include "base/basictypes.h"
  10
  11 namespace gfx {
  12 class Point;
  13 class Size;
  14 class Rect;
  15 }  // namespace gfx
  16
  17 namespace ui {
  18 class Layer;
  19
  20 COMPOSITOR_EXPORT float GetDeviceScaleFactor(const Layer* layer);
  21
  22 // Utility functions that convert point/size/rect between
  23 // DIP and pixel coordinates system.
  24 COMPOSITOR_EXPORT gfx::Point ConvertPointToDIP(
  25     const Layer* layer,
  26     const gfx::Point& point_in_pixel);
  27 COMPOSITOR_EXPORT gfx::Size ConvertSizeToDIP(
  28     const Layer* layer,
  29     const gfx::Size& size_in_pixel);
  30 COMPOSITOR_EXPORT gfx::Rect ConvertRectToDIP(
  31     const Layer* layer,
  32     const gfx::Rect& rect_in_pixel);
  33 COMPOSITOR_EXPORT gfx::Point ConvertPointToPixel(
  34     const Layer* layer,
  35     const gfx::Point& point_in_dip);
  36 COMPOSITOR_EXPORT gfx::Size ConvertSizeToPixel(
  37     const Layer* layer,
  38     const gfx::Size& size_in_dip);
  39 COMPOSITOR_EXPORT gfx::Rect ConvertRectToPixel(
  40     const Layer* layer,
  41     const gfx::Rect& rect_in_dip);
  42
  43 }  // namespace ui
  44
  45 #endif  // UI_COMPOSITOR_DIP_UTIL_H_