content/browser/gamepad/gamepad_standard_mappings.h

   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 CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_
   6 #define CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_
   7
   8 #include "base/strings/string_piece.h"
   9 #include "content/common/gamepad_hardware_buffer.h"
  10
  11 namespace content {
  12
  13 typedef void (*GamepadStandardMappingFunction)(
  14     const blink::WebGamepad& original,
  15     blink::WebGamepad* mapped);
  16
  17 GamepadStandardMappingFunction GetGamepadStandardMappingFunction(
  18     const base::StringPiece& vendor_id,
  19     const base::StringPiece& product_id);
  20
  21 // This defines our canonical mapping order for gamepad-like devices. If these
  22 // items cannot all be satisfied, it is a case-by-case judgement as to whether
  23 // it is better to leave the device unmapped, or to partially map it. In
  24 // general, err towards leaving it *unmapped* so that content can handle
  25 // appropriately.
  26
  27 // A Java counterpart will be generated for this enum.
  28 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.content.browser.input
  29 // GENERATED_JAVA_PREFIX_TO_STRIP: BUTTON_INDEX_
  30 enum CanonicalButtonIndex {
  31   BUTTON_INDEX_PRIMARY,
  32   BUTTON_INDEX_SECONDARY,
  33   BUTTON_INDEX_TERTIARY,
  34   BUTTON_INDEX_QUATERNARY,
  35   BUTTON_INDEX_LEFT_SHOULDER,
  36   BUTTON_INDEX_RIGHT_SHOULDER,
  37   BUTTON_INDEX_LEFT_TRIGGER,
  38   BUTTON_INDEX_RIGHT_TRIGGER,
  39   BUTTON_INDEX_BACK_SELECT,
  40   BUTTON_INDEX_START,
  41   BUTTON_INDEX_LEFT_THUMBSTICK,
  42   BUTTON_INDEX_RIGHT_THUMBSTICK,
  43   BUTTON_INDEX_DPAD_UP,
  44   BUTTON_INDEX_DPAD_DOWN,
  45   BUTTON_INDEX_DPAD_LEFT,
  46   BUTTON_INDEX_DPAD_RIGHT,
  47   BUTTON_INDEX_META,
  48   BUTTON_INDEX_COUNT
  49 };
  50
  51 // A Java counterpart will be generated for this enum.
  52 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.content.browser.input
  53 // GENERATED_JAVA_PREFIX_TO_STRIP: AXIS_INDEX_
  54 enum CanonicalAxisIndex {
  55   AXIS_INDEX_LEFT_STICK_X,
  56   AXIS_INDEX_LEFT_STICK_Y,
  57   AXIS_INDEX_RIGHT_STICK_X,
  58   AXIS_INDEX_RIGHT_STICK_Y,
  59   AXIS_INDEX_COUNT
  60 };
  61
  62 // Matches XInput's trigger deadzone
  63 const float kDefaultButtonPressedThreshold = 30.f/255.f;
  64
  65 // Common mapping functions
  66 blink::WebGamepadButton AxisToButton(float input);
  67 blink::WebGamepadButton AxisNegativeAsButton(float input);
  68 blink::WebGamepadButton AxisPositiveAsButton(float input);
  69 blink::WebGamepadButton ButtonFromButtonAndAxis(
  70     blink::WebGamepadButton button, float axis);
  71 blink::WebGamepadButton NullButton();
  72 void DpadFromAxis(blink::WebGamepad* mapped, float dir);
  73
  74 }  // namespace content
  75
  76 #endif  // CONTENT_BROWSER_GAMEPAD_GAMEPAD_STANDARD_MAPPINGS_H_