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 9 namespace content { 10 11 namespace { 12 13 // Maps 0..65535 to -1..1. 14 float NormalizeDirectInputAxis(long value) { 15 return (value * 1.f / 32767.5f) - 1.f; 16 } 17 18 float AxisNegativeAsButton(long value) { 19 return (value < 32767) ? 1.f : 0.f; 20 } 21 22 float AxisPositiveAsButton(long value) { 23 return (value > 32767) ? 1.f : 0.f; 24 } 25 26 void MapperDragonRiseGeneric( 27 const WebKit::WebGamepad& input, 28 WebKit::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 45 void MapperLogitechDualAction( 46 const WebKit::WebGamepad& input, 47 WebKit::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 64 void MapperLogitechPrecision( 65 const WebKit::WebGamepad& input, 66 WebKit::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 81 void Mapper2Axes8Keys( 82 const WebKit::WebGamepad& input, 83 WebKit::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 99 struct 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 112 113 GamepadStandardMappingFunction 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
