1 // Copyright 2016 Citra Emulator Project
2 // Licensed under GPLv2 or any later version
3 // Refer to the license.txt file included.
4 
5 #pragma once
6 
7 #include <memory>
8 #include <utility>
9 #include "core/frontend/emu_window.h"
10 
11 struct SDL_Window;
12 
13 class SharedContext_SDL2 : public Frontend::GraphicsContext {
14 public:
15     using SDL_GLContext = void*;
16 
17     SharedContext_SDL2();
18 
19     ~SharedContext_SDL2() override;
20 
21     void MakeCurrent() override;
22 
23     void DoneCurrent() override;
24 
25 private:
26     SDL_GLContext context;
27     SDL_Window* window;
28 };
29 
30 class EmuWindow_SDL2 : public Frontend::EmuWindow {
31 public:
32     explicit EmuWindow_SDL2(bool fullscreen);
33     ~EmuWindow_SDL2();
34 
35     void Present();
36 
37     /// Polls window events
38     void PollEvents() override;
39 
40     /// Makes the graphics context current for the caller thread
41     void MakeCurrent() override;
42 
43     /// Releases the GL context from the caller thread
44     void DoneCurrent() override;
45 
46     /// Whether the window is still open, and a close request hasn't yet been sent
47     bool IsOpen() const;
48 
49     /// Creates a new context that is shared with the current context
50     std::unique_ptr<GraphicsContext> CreateSharedContext() const override;
51 
52 private:
53     /// Called by PollEvents when a key is pressed or released.
54     void OnKeyEvent(int key, u8 state);
55 
56     /// Called by PollEvents when the mouse moves.
57     void OnMouseMotion(s32 x, s32 y);
58 
59     /// Called by PollEvents when a mouse button is pressed or released
60     void OnMouseButton(u32 button, u8 state, s32 x, s32 y);
61 
62     /// Translates pixel position (0..1) to pixel positions
63     std::pair<unsigned, unsigned> TouchToPixelPos(float touch_x, float touch_y) const;
64 
65     /// Called by PollEvents when a finger starts touching the touchscreen
66     void OnFingerDown(float x, float y);
67 
68     /// Called by PollEvents when a finger moves while touching the touchscreen
69     void OnFingerMotion(float x, float y);
70 
71     /// Called by PollEvents when a finger stops touching the touchscreen
72     void OnFingerUp();
73 
74     /// Called by PollEvents when any event that may cause the window to be resized occurs
75     void OnResize();
76 
77     /// Called when user passes the fullscreen parameter flag
78     void Fullscreen();
79 
80     /// Called when a configuration change affects the minimal size of the window
81     void OnMinimalClientAreaChangeRequest(std::pair<u32, u32> minimal_size) override;
82 
83     /// Is the window still open?
84     bool is_open = true;
85 
86     /// Internal SDL2 render window
87     SDL_Window* render_window;
88 
89     /// Fake hidden window for the core context
90     SDL_Window* dummy_window;
91 
92     using SDL_GLContext = void*;
93 
94     /// The OpenGL context associated with the window
95     SDL_GLContext window_context;
96 
97     /// The OpenGL context associated with the core
98     std::unique_ptr<Frontend::GraphicsContext> core_context;
99 
100     /// Keeps track of how often to update the title bar during gameplay
101     u32 last_time = 0;
102 };
103