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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_Graphics2D_Dev</code> interface. */
label Chrome {
M22 = 0.1
};
/* PPB_Graphics2D_Dev interface */
interface PPB_Graphics2D_Dev {
/**
* SetScale() sets the scale factor that will be applied when painting the
* graphics context onto the output device. Typically, if rendering at device
* resolution is desired, the context would be created with the width and
* height scaled up by the view's GetDeviceScale and SetScale called with a
* scale of 1.0 / GetDeviceScale(). For example, if the view resource passed
* to DidChangeView has a rectangle of (w=200, h=100) and a device scale of
* 2.0, one would call Create with a size of (w=400, h=200) and then call
* SetScale with 0.5. One would then treat each pixel in the context as a
* single device pixel.
*
* @param[in] resource A <code>Graphics2D</code> context resource.
* @param[in] scale The scale to apply when painting.
*
* @return Returns <code>PP_TRUE</code> on success or <code>PP_FALSE</code> if
* the resource is invalid or the scale factor is 0 or less.
*/
PP_Bool SetScale(
[in] PP_Resource resource,
[in] float_t scale);
/***
* GetScale() gets the scale factor that will be applied when painting the
* graphics context onto the output device.
*
* @param[in] resource A <code>Graphics2D</code> context resource.
*
* @return Returns the scale factor for the graphics context. If the resource
* is not a valid <code>Graphics2D</code> context, this will return 0.0.
*/
float_t GetScale(
[in] PP_Resource resource);
};
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