Home | History | Annotate | Download | only in c 
      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 ppb_gamepad.idl modified Tue Apr 16 09:04:34 2013. */
      7 
      8 #ifndef PPAPI_C_PPB_GAMEPAD_H_
      9 #define PPAPI_C_PPB_GAMEPAD_H_
     10 
     11 #include "ppapi/c/pp_bool.h"
     12 #include "ppapi/c/pp_instance.h"
     13 #include "ppapi/c/pp_macros.h"
     14 #include "ppapi/c/pp_stdint.h"
     15 
     16 #define PPB_GAMEPAD_INTERFACE_1_0 "PPB_Gamepad;1.0"
     17 #define PPB_GAMEPAD_INTERFACE PPB_GAMEPAD_INTERFACE_1_0
     18 
     19 /**
     20  * @file
     21  * This file defines the <code>PPB_Gamepad</code> interface, which
     22  * provides access to gamepad devices.
     23  */
     24 
     25 
     26 /**
     27  * @addtogroup Structs
     28  * @{
     29  */
     30 /**
     31  * The data for one gamepad device.
     32  */
     33 struct PP_GamepadSampleData {
     34   /**
     35    * Number of valid elements in the |axes| array.
     36    */
     37   uint32_t axes_length;
     38   /**
     39    * Normalized values for the axes, indices valid up to |axes_length|-1. Axis
     40    * values range from -1..1, and are in order of "importance".
     41    */
     42   float axes[16];
     43   /**
     44    * Number of valid elements in the |buttons| array.
     45    */
     46   uint32_t buttons_length;
     47   /**
     48    * Normalized values for the buttons, indices valid up to |buttons_length|
     49    * - 1. Button values range from 0..1, and are in order of importance.
     50    */
     51   float buttons[32];
     52   /**
     53    * Monotonically increasing value that is incremented when the data have
     54    * been updated.
     55    */
     56   double timestamp;
     57   /**
     58    * Identifier for the type of device/manufacturer.
     59    */
     60   uint16_t id[128];
     61   /**
     62    * Is there a gamepad connected at this index? If this is false, no other
     63    * data in this structure is valid.
     64    */
     65   PP_Bool connected;
     66   /* Padding to make the struct the same size between 64 and 32. */
     67   char unused_pad_[4];
     68 };
     69 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_GamepadSampleData, 472);
     70 
     71 /**
     72  * The data for all gamepads connected to the system.
     73  */
     74 struct PP_GamepadsSampleData {
     75   /**
     76    * Number of valid elements in the |items| array.
     77    */
     78   uint32_t length;
     79   /* Padding to make the struct the same size between 64 and 32. */
     80   char unused_pad_[4];
     81   /**
     82    * Data for an individual gamepad device connected to the system.
     83    */
     84   struct PP_GamepadSampleData items[4];
     85 };
     86 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_GamepadsSampleData, 1896);
     87 /**
     88  * @}
     89  */
     90 
     91 /**
     92  * @addtogroup Interfaces
     93  * @{
     94  */
     95 /**
     96  * The <code>PPB_Gamepad</code> interface allows retrieving data from
     97  * gamepad/joystick devices that are connected to the system.
     98  */
     99 struct PPB_Gamepad_1_0 {
    100   /**
    101    * Samples the current state of the available gamepads.
    102    */
    103   void (*Sample)(PP_Instance instance, struct PP_GamepadsSampleData* data);
    104 };
    105 
    106 typedef struct PPB_Gamepad_1_0 PPB_Gamepad;
    107 /**
    108  * @}
    109  */
    110 
    111 #endif  /* PPAPI_C_PPB_GAMEPAD_H_ */
    112 
    113