content/browser/gamepad/gamepad_standard_mappings_win.cc

   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 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
  45 void 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
  64 void 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
  81 void 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
  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