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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.
*/
/* This file contains the <code>PPB_View_Dev</code> interface. */
[generate_thunk]
label Chrome {
M22 = 0.1
};
/* PPB_View_Dev interface */
interface PPB_View_Dev {
/**
* 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.
*
* @param[in] resource A <code>PP_Resource</code> corresponding to a
* <code>PPB_View</code> resource.
*
* @return A <code>float</code> value representing the number of device pixels
* per DIP. If the resource is invalid, the value will be 0.0.
*/
float_t GetDeviceScale([in] PP_Resource resource);
/**
* 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.
*
* @param[in] resource A <code>PP_Resource</code> corresponding to a
* <code>PPB_View</code> resource.
*
* @return css_scale A <code>float</code> value representing the number of
* DIPs per CSS pixel. If the resource is invalid, the value will be 0.0.
*/
float_t GetCSSScale([in] PP_Resource resource);
};
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