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 struct WebKitGamepadButton { 21 bool pressed; 22 double value; 23 }; 24 25 // This must match the definition of blink::Gamepad. The GamepadHost unit test 26 // has some compile asserts to validate this. 27 struct WebKitGamepad { 28 static const size_t kIdLengthCap = 128; 29 static const size_t kMappingLengthCap = 16; 30 static const size_t kAxesLengthCap = 16; 31 static const size_t kButtonsLengthCap = 32; 32 33 // Is there a gamepad connected at this index? 34 bool connected; 35 36 // Device identifier (based on manufacturer, model, etc.). 37 base::char16 id[kIdLengthCap]; 38 39 // Monotonically increasing value referring to when the data were last 40 // updated. 41 unsigned long long timestamp; 42 43 // Number of valid entries in the axes array. 44 unsigned axes_length; 45 46 // Normalized values representing axes, in the range [-1..1]. 47 double axes[kAxesLengthCap]; 48 49 // Number of valid entries in the buttons array. 50 unsigned buttons_length; 51 52 // Normalized values representing buttons, in the range [0..1]. 53 WebKitGamepadButton buttons[kButtonsLengthCap]; 54 55 // Mapping type (for example "standard") 56 base::char16 mapping[kMappingLengthCap]; 57 }; 58 59 // This must match the definition of blink::Gamepads. The GamepadHost unit 60 // test has some compile asserts to validate this. 61 struct WebKitGamepads { 62 static const size_t kItemsLengthCap = 4; 63 64 // Number of valid entries in the items array. 65 unsigned length; 66 67 // Gamepad data for N separate gamepad devices. 68 WebKitGamepad items[kItemsLengthCap]; 69 }; 70 71 // This is the structure store in shared memory. It must match 72 // content/common/gamepad_hardware_buffer.h. The GamepadHost unit test has 73 // some compile asserts to validate this. 74 struct ContentGamepadHardwareBuffer { 75 base::subtle::Atomic32 sequence; 76 WebKitGamepads buffer; 77 }; 78 79 #pragma pack(pop) 80 81 PPAPI_SHARED_EXPORT void ConvertWebKitGamepadData( 82 const WebKitGamepads& webkit_data, 83 PP_GamepadsSampleData* output_data); 84 85 } // namespace ppapi 86 87 #endif // PPAPI_SHARED_IMPL_PPB_GAMEPAD_SHARED_H_ 88