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66 lines
2.1 KiB
66 lines
2.1 KiB
9 years ago
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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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*/
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/* From dev/ppb_view_dev.idl modified Mon Jun 18 14:55:58 2012. */
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#ifndef PPAPI_C_DEV_PPB_VIEW_DEV_H_
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#define PPAPI_C_DEV_PPB_VIEW_DEV_H_
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#include "ppapi/c/pp_macros.h"
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#include "ppapi/c/pp_resource.h"
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#include "ppapi/c/pp_stdint.h"
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#define PPB_VIEW_DEV_INTERFACE_0_1 "PPB_View(Dev);0.1"
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#define PPB_VIEW_DEV_INTERFACE PPB_VIEW_DEV_INTERFACE_0_1
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/**
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* @file
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* This file contains the <code>PPB_View_Dev</code> interface. */
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/**
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* @addtogroup Interfaces
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* @{
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*/
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/* PPB_View_Dev interface */
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struct PPB_View_Dev_0_1 {
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/**
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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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* @param[in] resource A <code>PP_Resource</code> corresponding to a
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* <code>PPB_View</code> resource.
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*
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* @return A <code>float</code> value representing the number of device pixels
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* per DIP. If the resource is invalid, the value will be 0.0.
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*/
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float (*GetDeviceScale)(PP_Resource resource);
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/**
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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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* @param[in] resource A <code>PP_Resource</code> corresponding to a
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* <code>PPB_View</code> resource.
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*
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* @return css_scale A <code>float</code> value representing the number of
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* DIPs per CSS pixel. If the resource is invalid, the value will be 0.0.
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*/
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float (*GetCSSScale)(PP_Resource resource);
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};
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typedef struct PPB_View_Dev_0_1 PPB_View_Dev;
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/**
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* @}
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*/
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#endif /* PPAPI_C_DEV_PPB_VIEW_DEV_H_ */
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