15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef PPAPI_CPP_DEV_VIEW_DEV_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PPAPI_CPP_DEV_VIEW_DEV_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ppapi/cpp/view.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace pp { 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ViewDev is a version of View that exposes under-development APIs related to 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// HiDPI 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ViewDev : public View { 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ViewDev() : View() {} 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ViewDev(const View& other) : View(other) {} 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~ViewDev() {} 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// GetDeviceScale returns the scale factor between device pixels and DIPs 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// (also known as logical pixels or UI pixels on some platforms). This allows 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// the developer to render their contents at device resolution, even as 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// coordinates / sizes are given in DIPs through the API. 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// Note that the coordinate system for Pepper APIs is DIPs. Also note that 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// one DIP might not equal one CSS pixel - when page scale/zoom is in effect. 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// @return A <code>float</code> value representing the number of device 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// pixels per DIP. 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float GetDeviceScale() const; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// GetCSSScale returns the scale factor between DIPs and CSS pixels. This 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// allows proper scaling between DIPs - as sent via the Pepper API - and CSS 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// pixel coordinates used for Web content. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// @return A <code>float</code> value representing the number of DIPs per CSS 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /// pixel. 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float GetCSSScale() const; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace pp 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // PPAPI_CPP_DEV_VIEW_DEV_H_ 45