ppapi/c/ppb_gamepad.h

   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