gamepad_standard_mappings_win.cc revision f2477e01787aa58f445919b809d89e252beef54f 
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#include "content/browser/gamepad/gamepad_standard_mappings.h"
6
7#include "content/common/gamepad_hardware_buffer.h"
8
9namespace content {
10
11namespace {
12
13// Maps 0..65535 to -1..1.
14float NormalizeDirectInputAxis(long value) {
15  return (value * 1.f / 32767.5f) - 1.f;
16}
17
18float AxisNegativeAsButton(long value) {
19  return (value < 32767) ? 1.f : 0.f;
20}
21
22float AxisPositiveAsButton(long value) {
23  return (value > 32767) ? 1.f : 0.f;
24}
25
26void MapperDragonRiseGeneric(
27    const blink::WebGamepad& input,
28    blink::WebGamepad* mapped) {
29  *mapped = input;
30  mapped->buttons[0] = input.buttons[1];
31  mapped->buttons[1] = input.buttons[2];
32  mapped->buttons[2] = input.buttons[0];
33  mapped->buttons[12] = input.buttons[16];
34  mapped->buttons[13] = input.buttons[17];
35  mapped->buttons[14] = input.buttons[18];
36  mapped->buttons[15] = input.buttons[19];
37  mapped->buttonsLength = 16;
38  mapped->axes[0] = NormalizeDirectInputAxis(input.axes[0]);
39  mapped->axes[1] = NormalizeDirectInputAxis(input.axes[1]);
40  mapped->axes[2] = NormalizeDirectInputAxis(input.axes[2]);
41  mapped->axes[3] = NormalizeDirectInputAxis(input.axes[5]);
42  mapped->axesLength = 4;
43}
44
45void MapperLogitechDualAction(
46    const blink::WebGamepad& input,
47    blink::WebGamepad* mapped) {
48  *mapped = input;
49  mapped->buttons[0] = input.buttons[1];
50  mapped->buttons[1] = input.buttons[2];
51  mapped->buttons[2] = input.buttons[0];
52  mapped->buttons[12] = input.buttons[16];
53  mapped->buttons[13] = input.buttons[17];
54  mapped->buttons[14] = input.buttons[18];
55  mapped->buttons[15] = input.buttons[19];
56  mapped->buttonsLength = 16;
57  mapped->axes[0] = NormalizeDirectInputAxis(input.axes[0]);
58  mapped->axes[1] = NormalizeDirectInputAxis(input.axes[1]);
59  mapped->axes[2] = NormalizeDirectInputAxis(input.axes[2]);
60  mapped->axes[3] = NormalizeDirectInputAxis(input.axes[5]);
61  mapped->axesLength = 4;
62}
63
64void MapperLogitechPrecision(
65    const blink::WebGamepad& input,
66    blink::WebGamepad* mapped) {
67  *mapped = input;
68  mapped->buttons[0] = input.buttons[1];
69  mapped->buttons[1] = input.buttons[2];
70  mapped->buttons[2] = input.buttons[0];
71  mapped->buttons[kButtonLeftThumbstick] = 0;  // Not present
72  mapped->buttons[kButtonRightThumbstick] = 0;  // Not present
73  mapped->buttons[12] = AxisNegativeAsButton(input.axes[1]);
74  mapped->buttons[13] = AxisPositiveAsButton(input.axes[1]);
75  mapped->buttons[14] = AxisNegativeAsButton(input.axes[0]);
76  mapped->buttons[15] = AxisPositiveAsButton(input.axes[0]);
77  mapped->buttonsLength = 16;
78  mapped->axesLength = 0;
79}
80
81void Mapper2Axes8Keys(
82    const blink::WebGamepad& input,
83    blink::WebGamepad* mapped) {
84  *mapped = input;
85  mapped->buttons[kButtonLeftTrigger] = 0;  // Not present
86  mapped->buttons[kButtonRightTrigger] = 0;  // Not present
87  mapped->buttons[8] = input.buttons[6];
88  mapped->buttons[9] = input.buttons[7];
89  mapped->buttons[kButtonLeftThumbstick] = 0;  // Not present
90  mapped->buttons[kButtonRightThumbstick] = 0;  // Not present
91  mapped->buttons[12] = AxisNegativeAsButton(input.axes[1]);
92  mapped->buttons[13] = AxisPositiveAsButton(input.axes[1]);
93  mapped->buttons[14] = AxisNegativeAsButton(input.axes[0]);
94  mapped->buttons[15] = AxisPositiveAsButton(input.axes[0]);
95  mapped->buttonsLength = 16;
96  mapped->axesLength = 0;
97}
98
99struct MappingData {
100  const char* const vendor_id;
101  const char* const product_id;
102  GamepadStandardMappingFunction function;
103} AvailableMappings[] = {
104  // http://www.linux-usb.org/usb.ids
105  { "0079", "0006", MapperDragonRiseGeneric },  // DragonRise Generic USB
106  { "046d", "c216", MapperLogitechDualAction },  // Logitech DualAction
107  { "046d", "c21a", MapperLogitechPrecision },  // Logitech Precision
108  { "12bd", "d012", Mapper2Axes8Keys },  // 2Axes 8Keys Game Pad
109};
110
111}  // namespace
112
113GamepadStandardMappingFunction GetGamepadStandardMappingFunction(
114    const base::StringPiece& vendor_id,
115    const base::StringPiece& product_id) {
116  for (size_t i = 0; i < arraysize(AvailableMappings); ++i) {
117    MappingData& item = AvailableMappings[i];
118    if (vendor_id == item.vendor_id && product_id == item.product_id)
119      return item.function;
120  }
121  return NULL;
122}
123
124}  // namespace content
125