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Unified Diff: device/gamepad/gamepad_pad_state_provider.h

Issue 2129003002: Refactored gamepad polling to support dynamic sources (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Disabled sanitization test on Android. Suffers from same bug as PollingAccess test Created 4 years, 4 months ago
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Index: device/gamepad/gamepad_pad_state_provider.h
diff --git a/device/gamepad/gamepad_pad_state_provider.h b/device/gamepad/gamepad_pad_state_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..1c2503220460c93f5487eaec069829f12f5d5915
--- /dev/null
+++ b/device/gamepad/gamepad_pad_state_provider.h
@@ -0,0 +1,97 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DEVICE_GAMEPAD_GAMEPAD_PAD_STATE_PROVIDER_H_
+#define DEVICE_GAMEPAD_GAMEPAD_PAD_STATE_PROVIDER_H_
+
+#include <stdint.h>
+
+#include <limits>
+#include <memory>
+
+#include "device/gamepad/gamepad_export.h"
+#include "device/gamepad/gamepad_standard_mappings.h"
+#include "third_party/WebKit/public/platform/WebGamepad.h"
+
+namespace device {
+
+class GamepadDataFetcher;
+
+enum GamepadSource {
+ GAMEPAD_SOURCE_NONE = 0,
+ GAMEPAD_SOURCE_ANDROID,
+ GAMEPAD_SOURCE_LINUX_UDEV,
+ GAMEPAD_SOURCE_MAC_HID,
+ GAMEPAD_SOURCE_MAC_XBOX,
+ GAMEPAD_SOURCE_TEST,
+ GAMEPAD_SOURCE_WIN_XINPUT,
+ GAMEPAD_SOURCE_WIN_RAW,
+};
+
+enum GamepadActiveState {
+ GAMEPAD_INACTIVE = 0,
+ GAMEPAD_ACTIVE,
+ GAMEPAD_NEWLY_ACTIVE,
+};
+
+struct PadState {
+ // Which data fetcher provided this gamepad's data.
+ GamepadSource source;
+ // Data fetcher-specific identifier for this gamepad.
+ int source_id;
+
+ // Indicates whether or not the gamepad is actively being updated
+ GamepadActiveState active_state;
+
+ // Gamepad data, unmapped.
+ blink::WebGamepad data;
+
+ // Functions to map from device data to standard layout, if available. May
+ // be null if no mapping is available or needed.
+ GamepadStandardMappingFunction mapper;
+
+ // Sanitization masks
+ // axis_mask and button_mask are bitfields that represent the reset state of
+ // each input. If a button or axis has ever reported 0 in the past the
+ // corresponding bit will be set to 1.
+
+ // If we ever increase the max axis count this will need to be updated.
+ static_assert(blink::WebGamepad::axesLengthCap <=
+ std::numeric_limits<uint32_t>::digits,
+ "axis_mask is not large enough");
+ uint32_t axis_mask;
+
+ // If we ever increase the max button count this will need to be updated.
+ static_assert(blink::WebGamepad::buttonsLengthCap <=
+ std::numeric_limits<uint32_t>::digits,
+ "button_mask is not large enough");
+ uint32_t button_mask;
+};
+
+class DEVICE_GAMEPAD_EXPORT GamepadPadStateProvider {
+ public:
+ GamepadPadStateProvider();
+ virtual ~GamepadPadStateProvider();
+
+ // Gets a PadState object for the given source and id. If the device hasn't
+ // been encountered before one of the remaining slots will be reserved for it.
+ // If no slots are available will return NULL.
+ PadState* GetPadState(GamepadSource source, int source_id);
+
+ protected:
+ void ClearPadState(PadState& state);
+
+ void InitializeDataFetcher(GamepadDataFetcher* fetcher);
+
+ void MapAndSanitizeGamepadData(PadState* pad_state,
+ blink::WebGamepad* pad,
+ bool sanitize);
+
+ // Tracks the state of each gamepad slot.
+ std::unique_ptr<PadState[]> pad_states_;
+};
+
+} // namespace device
+
+#endif // DEVICE_GAMEPAD_GAMEPAD_PAD_STATE_PROVIDER_H_
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