Pepper gamepad support

ppapi/c/dev/ppb_gamepad_dev.h

+/* Copyright (c) 2011 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 dev/ppb_gamepad_dev.idl modified Thu Jan  5 16:29:38 2012. */
+
+#ifndef PPAPI_C_DEV_PPB_GAMEPAD_DEV_H_
+#define PPAPI_C_DEV_PPB_GAMEPAD_DEV_H_
+
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_stdint.h"
+
+#define PPB_GAMEPAD_DEV_INTERFACE_0_1 "PPB_Gamepad(Dev);0.1"
+#define PPB_GAMEPAD_DEV_INTERFACE PPB_GAMEPAD_DEV_INTERFACE_0_1
+
+/**
+ * @file
+ * This file defines the <code>PPB_Gamepad_Dev</code> interface, which
+ * provides access to gamepad devices.
+ */
+
+
+/**
+ * @addtogroup Structs
+ * @{
+ */
+/**
+ * The data for one gamepad device.
+ */
+struct PP_GamepadData_Dev {
+  /**
+   * Is there a gamepad connected at this index? If this is false, no other
+   * data in this structure is valid.
+   */
+  char connected;
+  /**
+   * String identifier for the type of device/manufacturer.
+   */
+  uint16_t id[128];
+  /**
+   * Monotonically increasing value that is incremented when the data have
+   * been updated.
+   */
+  uint64_t timestamp;
+  /**
+   * Number of valid elements in the |axes| array.
+   */
+  uint32_t axes_length;
+  /**
+   * Normalized values for the axes, indices valid up to |axesLength|-1. Axis
+   * values range from -1..1, and are in order of "importance".
+   */
+  float axes[16];
+  /**
+   * Number of valid elements in the |buttons| array.
+   */
+  uint32_t buttons_length;
+  /**
+   * Normalized values for the buttons, indices valid up to |buttonsLength|
+   * - 1. Button values range from 0..1, and are in order of importance.
+   */
+  float buttons[32];
+};
+PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_GamepadData_Dev, 472);
+
+/**
+ * The data for all gamepads connected to the system.
+ */
+struct PP_GamepadsData_Dev {
+  /**
+   * Number of valid elements in the |items| array.
+   */
+  uint32_t length;
+  /**
+   * Data for an individual gamepad device connected to the system.
+   */
+  struct PP_GamepadData_Dev items[4];
+};
+PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_GamepadsData_Dev, 1896);
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
+/**
+ * The <code>PPB_Gamepad_Dev</code> interface allows retrieving data from
+ * gamepad/joystick devices that are connected to the system.
+ */
+struct PPB_Gamepad_Dev {
+  /**
+   * Samples the current state of the connected gamepads.
+   */
+  void (*SampleGamepads)(PP_Instance instance,
+                         struct PP_GamepadsData_Dev* data);
+};
+/**
+ * @}
+ */
+
+#endif  /* PPAPI_C_DEV_PPB_GAMEPAD_DEV_H_ */
+