15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 6c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)/* From pp_touch_point.idl modified Thu Mar 28 10:13:07 2013. */ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef PPAPI_C_PP_TOUCH_POINT_H_ 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define PPAPI_C_PP_TOUCH_POINT_H_ 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ppapi/c/pp_macros.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ppapi/c/pp_point.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ppapi/c/pp_stdint.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/** 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @file 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This file defines the API to create a touch point or position where fingers 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * makes contact with touch screen device. 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/** 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @addtogroup Structs 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @{ 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/** 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * The <code>PP_TouchPoint</code> struct represents all information about a 28c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) * single touch point, such as position, id, rotation angle, and pressure. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct PP_TouchPoint { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This value represents the identifier for this TouchPoint. The id 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * corresponds to the order in which the points were pressed. For example, 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * the first point to be pressed has an id of 0, the second has an id of 1, 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * and so on. An id can be reused when a touch point is released. For 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * example, if two fingers are down, with id 0 and 1, and finger 0 releases, 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * the next finger to be pressed can be assigned to id 0. 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32_t id; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This value represents the x and y pixel position of this TouchPoint 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * relative to the upper-left of the module instance receiving the event. 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct PP_FloatPoint position; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This value represents the elliptical radii, in screen pixels, in the x 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * and y direction of this TouchPoint. 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct PP_FloatPoint radius; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This value represents the angle of rotation in degrees of the elliptical 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * model of this TouchPoint clockwise from "up." 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float rotation_angle; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This value represents the pressure applied to this TouchPoint. This value 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * is typically between 0 and 1, with 0 indicating no pressure and 1 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * indicating some maximum pressure. Scaling differs depending on the 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * hardware and the value is not guaranteed to stay within that range. 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) float pressure; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_TouchPoint, 28); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/** 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @} 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/** 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @addtogroup Functions 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @{ 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/** 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * PP_MakeTouchPoint() creates a <code>PP_TouchPoint</code>. 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @return A <code>PP_TouchPoint</code> structure. 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 782a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)PP_INLINE struct PP_TouchPoint PP_MakeTouchPoint(void) { 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct PP_TouchPoint result = { 0, {0, 0}, {0, 0}, 0, 0 }; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return result; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/** 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * @} 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif /* PPAPI_C_PP_TOUCH_POINT_H_ */ 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 88