content/browser/renderer_host/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 CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_
   7
   8 #include "content/common/content_export.h"
   9 #include "ui/base/layout.h"
  10
  11 namespace gfx {
  12 class Point;
  13 class Rect;
  14 class Size;
  15 }  // namespace gfx
  16
  17 namespace content {
  18 class RenderWidgetHostView;
  19
  20 // Returns scale factor of the display nearest to |view|.
  21 // Returns ui::SCALE_FACTOR_100P if the platform does not support DIP.
  22 CONTENT_EXPORT ui::ScaleFactor GetScaleFactorForView(
  23     const RenderWidgetHostView* view);
  24
  25 // Utility functions that convert point/size/rect between DIP and pixel
  26 // coordinate system.
  27 CONTENT_EXPORT gfx::Point ConvertViewPointToDIP(
  28     const RenderWidgetHostView* view, const gfx::Point& point_in_pixel);
  29 CONTENT_EXPORT gfx::Size ConvertViewSizeToPixel(
  30     const RenderWidgetHostView* view, const gfx::Size& size_in_dip);
  31 CONTENT_EXPORT gfx::Rect ConvertViewRectToPixel(
  32     const RenderWidgetHostView* view, const gfx::Rect& rect_in_dip);
  33
  34 CONTENT_EXPORT gfx::Size ConvertSizeToDIP(
  35     float scale_factor, const gfx::Size& size_in_pixel);
  36 CONTENT_EXPORT gfx::Rect ConvertRectToDIP(
  37     float scale_factor, const gfx::Rect& rect_in_pixel);
  38 CONTENT_EXPORT gfx::Rect ConvertRectToPixel(
  39     float scale_factor, const gfx::Rect& rect_in_dip);
  40
  41 }  // namespace content
  42
  43 #endif  // CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_