Dependencies: Remove GLFW, Add SDL2

citra: Remove GLFW, Add SDL2

FindSDL2: Do not CACHE SDL2_* variables if library is not found

EmuWindow_SDL2: Set minimal client area at initialisation time

EmuWindow_SDL2: Corrections

EmuWindow_SDL2: Fix no decorations on startup on OS X

cmake: windows_copy_files

src/citra/emu_window/emu_window_sdl2.h

@@ -0,0 +1,64 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <utility>
+
+#include "common/emu_window.h"
+
+struct SDL_Window;
+
+class EmuWindow_SDL2 : public EmuWindow {
+public:
+    EmuWindow_SDL2();
+    ~EmuWindow_SDL2();
+
+    /// Swap buffers to display the next frame
+    void SwapBuffers() override;
+
+    /// Polls window events
+    void PollEvents() override;
+
+    /// Makes the graphics context current for the caller thread
+    void MakeCurrent() override;
+
+    /// Releases the GL context from the caller thread
+    void DoneCurrent() override;
+
+    /// Whether the window is still open, and a close request hasn't yet been sent
+    bool IsOpen() const;
+
+    /// Load keymap from configuration
+    void ReloadSetKeymaps() override;
+
+private:
+    /// Called by PollEvents when a key is pressed or released.
+    void OnKeyEvent(int key, u8 state);
+
+    /// Called by PollEvents when the mouse moves.
+    void OnMouseMotion(s32 x, s32 y);
+
+    /// Called by PollEvents when a mouse button is pressed or released
+    void OnMouseButton(u32 button, u8 state, s32 x, s32 y);
+
+    /// Called by PollEvents when any event that may cause the window to be resized occurs
+    void OnResize();
+
+    /// Called when a configuration change affects the minimal size of the window
+    void OnMinimalClientAreaChangeRequest(const std::pair<unsigned, unsigned>& minimal_size) override;
+
+    /// Is the window still open?
+    bool is_open = true;
+
+    /// Internal SDL2 render window
+    SDL_Window* render_window;
+
+    using SDL_GLContext = void *;
+    /// The OpenGL context associated with the window
+    SDL_GLContext gl_context;
+
+    /// Device id of keyboard for use with KeyMap
+    int keyboard_id;
+};