add GameControl feature and SDL2 dependency

1 files changed, 86 insertions, 0 deletions

diff --git a/indra/llwindow/llgamecontrol.h b/indra/llwindow/llgamecontrol.h
new file mode 100644
index 0000000000..fe6d6f0138
--- /dev/null
+++ b/indra/llwindow/llgamecontrol.h
@@ -0,0 +1,86 @@
+/**
+ * @file llgamecontrol.h
+ * @brief GameController detection and management
+ *
+ * $LicenseInfo:firstyear=2023&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2023, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#pragma once
+
+#include <vector>
+
+
+#include "llerror.h"
+#include "llsingleton.h"
+#include "stdtypes.h"
+
+
+// LLGameControl is a singleton with pure static public interface
+class LLGameControl : public LLSingleton<LLGameControl>
+{
+    LLSINGLETON_EMPTY_CTOR(LLGameControl);
+    virtual ~LLGameControl();
+    LOG_CLASS(LLGameControl);
+
+public:
+    // State is a minimal class for storing axes and buttons values
+    class State
+    {
+    public:
+        State();
+        bool onButton(U8 button, bool pressed);
+        std::vector<S16> mAxes; // [ -32768, 32767 ]
+        std::vector<S16> mPrevAxes; // value in last outgoing packet
+        U32 mButtons;
+    };
+
+    static bool isInitialized();
+    static void init();
+    static void terminate();
+
+    static void addKeyButtonMap(U16 key, U8 button);
+    static void removeKeyButtonMap(U16 key);
+    static void addKeyAxisMap(U16 key, U8 axis, bool positive);
+    static void removeKeyAxisMap(U16 key);
+
+    static void onKeyDown(U16 key, U32 mask);
+    static void onKeyUp(U16 key, U32 mask);
+
+    // returns 'true' if GameControlInput message needs to go out,
+    // which will be the case for new data or resend. Call this right
+    // before deciding to put a GameControlInput packet on the wire
+    // or not.
+    static bool computeFinalInputAndCheckForChanges();
+
+    static void clearAllInput();
+    static void clearAllKeys();
+
+    static void processEvents(bool app_has_focus = true);
+    static const State& getState();
+
+    static void setIncludeKeyboardButtons(bool include);
+    static bool getIncludeKeyboardButtons();
+
+    // call this after putting a GameControlInput packet on the wire
+    static void updateResendPeriod();
+};
+