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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_CPP_DEV_VIEW_DEV_H_
#define PPAPI_CPP_DEV_VIEW_DEV_H_
#include "ppapi/cpp/view.h"
namespace pp {
// ViewDev is a version of View that exposes under-development APIs related to
// HiDPI
class ViewDev : public View {
public:
ViewDev() : View() {}
ViewDev(const View& other) : View(other) {}
virtual ~ViewDev() {}
/// GetDeviceScale returns the scale factor between device pixels and DIPs
/// (also known as logical pixels or UI pixels on some platforms). This allows
/// the developer to render their contents at device resolution, even as
/// coordinates / sizes are given in DIPs through the API.
///
/// Note that the coordinate system for Pepper APIs is DIPs. Also note that
/// one DIP might not equal one CSS pixel - when page scale/zoom is in effect.
///
/// @return A <code>float</code> value representing the number of device
/// pixels per DIP.
float GetDeviceScale() const;
/// GetCSSScale returns the scale factor between DIPs and CSS pixels. This
/// allows proper scaling between DIPs - as sent via the Pepper API - and CSS
/// pixel coordinates used for Web content.
///
/// @return A <code>float</code> value representing the number of DIPs per CSS
/// pixel.
float GetCSSScale() const;
};
} // namespace pp
#endif // PPAPI_CPP_DEV_VIEW_DEV_H_
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