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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_DPI_WIN_H_
#define UI_GFX_DPI_WIN_H_
#include "ui/gfx/gfx_export.h"
#include "ui/gfx/point.h"
#include "ui/gfx/rect.h"
#include "ui/gfx/size.h"
namespace gfx {
UI_EXPORT Size GetDPI();
// Gets the scale factor of the display. For example, if the display DPI is
// 96 then the scale factor is 1.0.
UI_EXPORT float GetDPIScale();
UI_EXPORT bool IsInHighDPIMode();
UI_EXPORT void EnableHighDPISupport();
// TODO(kevers|girard): Move above methods into win namespace.
namespace win {
UI_EXPORT float GetDeviceScaleFactor();
UI_EXPORT Point ScreenToDIPPoint(const Point& pixel_point);
UI_EXPORT Point DIPToScreenPoint(const Point& dip_point);
UI_EXPORT Rect ScreenToDIPRect(const Rect& pixel_bounds);
UI_EXPORT Rect DIPToScreenRect(const Rect& dip_bounds);
UI_EXPORT Size ScreenToDIPSize(const Size& size_in_pixels);
UI_EXPORT Size DIPToScreenSize(const Size& dip_size);
// Win32's GetSystemMetrics uses pixel measures. This function calls
// GetSystemMetrics for the given |metric|, then converts the result to DIP.
UI_EXPORT int GetSystemMetricsInDIP(int metric);
// Sometimes the OS secretly scales apps that are not DPIAware. This is not
// visible through standard OS calls like GetWindowPos(), or through
// GetDPIScale().
// Returns the scale factor of the display, where 96 DPI is 1.0.
// (Avoid this function... use GetDPIScale() instead.)
// TODO(girard): Remove this once DPIAware is enabled - http://crbug.com/149881
UI_EXPORT double GetUndocumentedDPIScale();
// Win7 and Win8 send touch events scaled according to the current DPI
// scaling. Win8.1 corrects this, and sends touch events in DPI units.
// This function returns the appropriate scaling factor for touch events.
UI_EXPORT double GetUndocumentedDPITouchScale();
} // namespace win
} // namespace gfx
#endif // UI_GFX_DPI_WIN_H_
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