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
10namespace gfx {
11class Point;
12class Rect;
13class Size;
14}  // namespace gfx
15
16namespace content {
17class RenderWidgetHostView;
18
19// Returns scale factor of the display nearest to |view|.
20// Returns 1.0f if the platform does not support DIP.
21CONTENT_EXPORT float GetScaleFactorForView(const RenderWidgetHostView* view);
22
23// Utility functions that convert point/size/rect between DIP and pixel
24// coordinate system.
25CONTENT_EXPORT gfx::Point ConvertViewPointToDIP(
26    const RenderWidgetHostView* view, const gfx::Point& point_in_pixel);
27CONTENT_EXPORT gfx::Size ConvertViewSizeToPixel(
28    const RenderWidgetHostView* view, const gfx::Size& size_in_dip);
29CONTENT_EXPORT gfx::Rect ConvertViewRectToPixel(
30    const RenderWidgetHostView* view, const gfx::Rect& rect_in_dip);
31
32CONTENT_EXPORT gfx::Size ConvertSizeToDIP(
33    float scale_factor, const gfx::Size& size_in_pixel);
34CONTENT_EXPORT gfx::Rect ConvertRectToDIP(
35    float scale_factor, const gfx::Rect& rect_in_pixel);
36CONTENT_EXPORT gfx::Size ConvertSizeToPixel(
37    float scale_factor, const gfx::Size& size_in_pixel);
38CONTENT_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_
44