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 /* From dev/ppb_graphics_2d_dev.idl modified Tue Jun 19 14:11:08 2012. */ 7 8 #ifndef PPAPI_C_DEV_PPB_GRAPHICS_2D_DEV_H_ 9 #define PPAPI_C_DEV_PPB_GRAPHICS_2D_DEV_H_ 10 11 #include "ppapi/c/pp_bool.h" 12 #include "ppapi/c/pp_macros.h" 13 #include "ppapi/c/pp_resource.h" 14 #include "ppapi/c/pp_stdint.h" 15 16 #define PPB_GRAPHICS2D_DEV_INTERFACE_0_1 "PPB_Graphics2D(Dev);0.1" 17 #define PPB_GRAPHICS2D_DEV_INTERFACE PPB_GRAPHICS2D_DEV_INTERFACE_0_1 18 19 /** 20 * @file 21 * This file contains the <code>PPB_Graphics2D_Dev</code> interface. */ 22 23 24 /** 25 * @addtogroup Interfaces 26 * @{ 27 */ 28 /* PPB_Graphics2D_Dev interface */ 29 struct PPB_Graphics2D_Dev_0_1 { 30 /** 31 * SetScale() sets the scale factor that will be applied when painting the 32 * graphics context onto the output device. Typically, if rendering at device 33 * resolution is desired, the context would be created with the width and 34 * height scaled up by the view's GetDeviceScale and SetScale called with a 35 * scale of 1.0 / GetDeviceScale(). For example, if the view resource passed 36 * to DidChangeView has a rectangle of (w=200, h=100) and a device scale of 37 * 2.0, one would call Create with a size of (w=400, h=200) and then call 38 * SetScale with 0.5. One would then treat each pixel in the context as a 39 * single device pixel. 40 * 41 * @param[in] resource A <code>Graphics2D</code> context resource. 42 * @param[in] scale The scale to apply when painting. 43 * 44 * @return Returns <code>PP_TRUE</code> on success or <code>PP_FALSE</code> if 45 * the resource is invalid or the scale factor is 0 or less. 46 */ 47 PP_Bool (*SetScale)(PP_Resource resource, float scale); 48 /*** 49 * GetScale() gets the scale factor that will be applied when painting the 50 * graphics context onto the output device. 51 * 52 * @param[in] resource A <code>Graphics2D</code> context resource. 53 * 54 * @return Returns the scale factor for the graphics context. If the resource 55 * is not a valid <code>Graphics2D</code> context, this will return 0.0. 56 */ 57 float (*GetScale)(PP_Resource resource); 58 }; 59 60 typedef struct PPB_Graphics2D_Dev_0_1 PPB_Graphics2D_Dev; 61 /** 62 * @} 63 */ 64 65 #endif /* PPAPI_C_DEV_PPB_GRAPHICS_2D_DEV_H_ */ 66 67
