1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 */ 5 6 /* This file contains the <code>PPB_Graphics2D_Dev</code> interface. */ 7 8 [generate_thunk] 9 10 label Chrome { 11 M22 = 0.1 12 }; 13 14 /* PPB_Graphics2D_Dev interface */ 15 interface PPB_Graphics2D_Dev { 16 /** 17 * SetScale() sets the scale factor that will be applied when painting the 18 * graphics context onto the output device. Typically, if rendering at device 19 * resolution is desired, the context would be created with the width and 20 * height scaled up by the view's GetDeviceScale and SetScale called with a 21 * scale of 1.0 / GetDeviceScale(). For example, if the view resource passed 22 * to DidChangeView has a rectangle of (w=200, h=100) and a device scale of 23 * 2.0, one would call Create with a size of (w=400, h=200) and then call 24 * SetScale with 0.5. One would then treat each pixel in the context as a 25 * single device pixel. 26 * 27 * @param[in] resource A <code>Graphics2D</code> context resource. 28 * @param[in] scale The scale to apply when painting. 29 * 30 * @return Returns <code>PP_TRUE</code> on success or <code>PP_FALSE</code> if 31 * the resource is invalid or the scale factor is 0 or less. 32 */ 33 PP_Bool SetScale( 34 [in] PP_Resource resource, 35 [in] float_t scale); 36 37 /*** 38 * GetScale() gets the scale factor that will be applied when painting the 39 * graphics context onto the output device. 40 * 41 * @param[in] resource A <code>Graphics2D</code> context resource. 42 * 43 * @return Returns the scale factor for the graphics context. If the resource 44 * is not a valid <code>Graphics2D</code> context, this will return 0.0. 45 */ 46 float_t GetScale( 47 [in] PP_Resource resource); 48 }; 49 50
