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view_dev.h
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef PPAPI_CPP_DEV_VIEW_DEV_H_
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#define PPAPI_CPP_DEV_VIEW_DEV_H_
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#include "ppapi/cpp/view.h"
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namespace
pp {
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// ViewDev is a version of View that exposes under-development APIs related to
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// HiDPI
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class
ViewDev
:
public
View
{
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public
:
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ViewDev
() :
View
() {}
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ViewDev
(
const
View
& other) :
View
(other) {}
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virtual
~ViewDev
() {}
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/// GetDeviceScale returns the scale factor between device pixels and DIPs
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/// (also known as logical pixels or UI pixels on some platforms). This allows
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/// the developer to render their contents at device resolution, even as
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/// coordinates / sizes are given in DIPs through the API.
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///
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/// Note that the coordinate system for Pepper APIs is DIPs. Also note that
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/// one DIP might not equal one CSS pixel - when page scale/zoom is in effect.
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///
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/// @return A <code>float</code> value representing the number of device
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/// pixels per DIP.
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float
GetDeviceScale
()
const
;
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/// GetCSSScale returns the scale factor between DIPs and CSS pixels. This
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/// allows proper scaling between DIPs - as sent via the Pepper API - and CSS
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/// pixel coordinates used for Web content.
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///
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/// @return A <code>float</code> value representing the number of DIPs per CSS
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/// pixel.
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float
GetCSSScale
()
const
;
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};
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}
// namespace pp
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#endif // PPAPI_CPP_DEV_VIEW_DEV_H_
pp::ViewDev::ViewDev
ViewDev(const View &other)
Definition:
view_dev.h:17
pp::ViewDev::ViewDev
ViewDev()
Definition:
view_dev.h:16
pp::ViewDev
Definition:
view_dev.h:14
pp::View
Definition:
view.h:20
pp::ViewDev::~ViewDev
virtual ~ViewDev()
Definition:
view_dev.h:19
pp::ViewDev::GetCSSScale
float GetCSSScale() const
pp::ViewDev::GetDeviceScale
float GetDeviceScale() const
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