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
  10 namespace gfx {
  11 class Point;
  12 class Rect;
  13 class Size;
  14 }  // namespace gfx
  15
  16 namespace content {
  17 class RenderWidgetHostView;
  18
  19 // Returns scale factor of the display nearest to |view|.
  20 // Returns 1.0f if the platform does not support DIP.
  21 CONTENT_EXPORT float GetScaleFactorForView(const RenderWidgetHostView* view);
  22
  23 // Utility functions that convert point/size/rect between DIP and pixel
  24 // coordinate system.
  25 CONTENT_EXPORT gfx::Point ConvertViewPointToDIP(
  26     const RenderWidgetHostView* view, const gfx::Point& point_in_pixel);
  27 CONTENT_EXPORT gfx::Size ConvertViewSizeToPixel(
  28     const RenderWidgetHostView* view, const gfx::Size& size_in_dip);
  29 CONTENT_EXPORT gfx::Rect ConvertViewRectToPixel(
  30     const RenderWidgetHostView* view, const gfx::Rect& rect_in_dip);
  31
  32 CONTENT_EXPORT gfx::Size ConvertSizeToDIP(
  33     float scale_factor, const gfx::Size& size_in_pixel);
  34 CONTENT_EXPORT gfx::Rect ConvertRectToDIP(
  35     float scale_factor, const gfx::Rect& rect_in_pixel);
  36 CONTENT_EXPORT gfx::Size ConvertSizeToPixel(
  37     float scale_factor, const gfx::Size& size_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_