Common: Add GL context wrapper implementation

src/common/gl/context_glx.h

@@ -0,0 +1,41 @@
+#pragma once
+#include "context.h"
+#include "glad_glx.h"
+#include "x11_window.h"
+
+namespace GL {
+
+class ContextGLX final : public Context
+{
+public:
+  ContextGLX(const WindowInfo& wi);
+  ~ContextGLX() override;
+
+  static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
+                                         size_t num_versions_to_try);
+
+  void* GetProcAddress(const char* name) override;
+  bool ChangeSurface(const WindowInfo& new_wi) override;
+  void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
+  bool SwapBuffers() override;
+  bool MakeCurrent() override;
+  bool DoneCurrent() override;
+  bool SetSwapInterval(s32 interval) override;
+  std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
+
+private:
+  ALWAYS_INLINE Display* GetDisplay() const { return static_cast<Display*>(m_wi.display_connection); }
+  ALWAYS_INLINE GLXDrawable GetDrawable() const { return static_cast<GLXDrawable>(m_window.GetWindow()); }
+
+  bool Initialize(const Version* versions_to_try, size_t num_versions_to_try);
+  bool CreateWindow(int screen);
+  bool CreateAnyContext(GLXContext share_context, bool make_current);
+  bool CreateVersionContext(const Version& version, GLXContext share_context, bool make_current);
+
+  GLXContext m_context = nullptr;
+  GLXFBConfig m_fb_config = {};
+  XVisualInfo* m_vi = nullptr;
+  X11Window m_window;
+};
+
+} // namespace GL