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 #ifndef PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_ 6 #define PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_ 7 8 #include "base/atomicops.h" 9 #include "base/strings/string16.h" 10 #include "ppapi/c/ppb_gamepad.h" 11 #include "ppapi/shared_impl/ppapi_shared_export.h" 12 13 namespace ppapi { 14 15 // TODO(brettw) when we remove the non-IPC-based gamepad implementation, this 16 // code should all move into the GamepadResource. 17 18 #pragma pack(push, 1) 19 20 // This must match the definition of blink::Gamepad. The GamepadHost unit test 21 // has some compile asserts to validate this. 22 struct WebKitGamepad { 23 static const size_t kIdLengthCap = 128; 24 static const size_t kAxesLengthCap = 16; 25 static const size_t kButtonsLengthCap = 32; 26 27 // Is there a gamepad connected at this index? 28 bool connected; 29 30 // Device identifier (based on manufacturer, model, etc.). 31 char16 id[kIdLengthCap]; 32 33 // Monotonically increasing value referring to when the data were last 34 // updated. 35 unsigned long long timestamp; 36 37 // Number of valid entries in the axes array. 38 unsigned axes_length; 39 40 // Normalized values representing axes, in the range [-1..1]. 41 float axes[kAxesLengthCap]; 42 43 // Number of valid entries in the buttons array. 44 unsigned buttons_length; 45 46 // Normalized values representing buttons, in the range [0..1]. 47 float buttons[kButtonsLengthCap]; 48 }; 49 50 // This must match the definition of blink::Gamepads. The GamepadHost unit 51 // test has some compile asserts to validate this. 52 struct WebKitGamepads { 53 static const size_t kItemsLengthCap = 4; 54 55 // Number of valid entries in the items array. 56 unsigned length; 57 58 // Gamepad data for N separate gamepad devices. 59 WebKitGamepad items[kItemsLengthCap]; 60 }; 61 62 // This is the structure store in shared memory. It must match 63 // content/common/gamepad_hardware_buffer.h. The GamepadHost unit test has 64 // some compile asserts to validate this. 65 struct ContentGamepadHardwareBuffer { 66 base::subtle::Atomic32 sequence; 67 WebKitGamepads buffer; 68 }; 69 70 #pragma pack(pop) 71 72 PPAPI_SHARED_EXPORT void ConvertWebKitGamepadData( 73 const WebKitGamepads& webkit_data, 74 PP_GamepadsSampleData* output_data); 75 76 } // namespace ppapi 77 78 #endif // PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_ 79