| /* 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. |
| */ |
| |
| /* From pp_touch_point.idl modified Thu Mar 28 10:13:07 2013. */ |
| |
| #ifndef PPAPI_C_PP_TOUCH_POINT_H_ |
| #define PPAPI_C_PP_TOUCH_POINT_H_ |
| |
| #include "ppapi/c/pp_macros.h" |
| #include "ppapi/c/pp_point.h" |
| #include "ppapi/c/pp_stdint.h" |
| |
| /** |
| * @file |
| * This file defines the API to create a touch point or position where fingers |
| * makes contact with touch screen device. |
| */ |
| |
| |
| /** |
| * @addtogroup Structs |
| * @{ |
| */ |
| /** |
| * The <code>PP_TouchPoint</code> struct represents all information about a |
| * single touch point, such as position, id, rotation angle, and pressure. |
| */ |
| struct PP_TouchPoint { |
| /** |
| * This value represents the identifier for this TouchPoint. The id |
| * corresponds to the order in which the points were pressed. For example, |
| * the first point to be pressed has an id of 0, the second has an id of 1, |
| * and so on. An id can be reused when a touch point is released. For |
| * example, if two fingers are down, with id 0 and 1, and finger 0 releases, |
| * the next finger to be pressed can be assigned to id 0. |
| */ |
| uint32_t id; |
| /** |
| * This value represents the x and y pixel position of this TouchPoint |
| * relative to the upper-left of the module instance receiving the event. |
| */ |
| struct PP_FloatPoint position; |
| /** |
| * This value represents the elliptical radii, in screen pixels, in the x |
| * and y direction of this TouchPoint. |
| */ |
| struct PP_FloatPoint radius; |
| /** |
| * This value represents the angle of rotation in degrees of the elliptical |
| * model of this TouchPoint clockwise from "up." |
| */ |
| float rotation_angle; |
| /** |
| * This value represents the pressure applied to this TouchPoint. This value |
| * is typically between 0 and 1, with 0 indicating no pressure and 1 |
| * indicating some maximum pressure. Scaling differs depending on the |
| * hardware and the value is not guaranteed to stay within that range. |
| */ |
| float pressure; |
| }; |
| PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_TouchPoint, 28); |
| /** |
| * @} |
| */ |
| |
| /** |
| * @addtogroup Functions |
| * @{ |
| */ |
| |
| /** |
| * PP_MakeTouchPoint() creates a <code>PP_TouchPoint</code>. |
| * |
| * @return A <code>PP_TouchPoint</code> structure. |
| */ |
| PP_INLINE struct PP_TouchPoint PP_MakeTouchPoint(void) { |
| struct PP_TouchPoint result = { 0, {0, 0}, {0, 0}, 0, 0 }; |
| return result; |
| } |
| /** |
| * @} |
| */ |
| |
| #endif /* PPAPI_C_PP_TOUCH_POINT_H_ */ |
| |