Refactoring and cleanup of GLInterface (now GLContext)

Source/Core/Common/GL/GLX11Window.cpp

@@ -0,0 +1,77 @@
+// Copyright 2012 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Common/GL/GLX11Window.h"
+#include "Common/GL/GLContext.h"
+#include "Common/Thread.h"
+
+GLX11Window::GLX11Window(Display* display, Window parent_window, Colormap color_map, Window window,
+                         int width, int height)
+    : m_display(display), m_parent_window(parent_window), m_color_map(color_map), m_window(window),
+      m_width(width), m_height(height),
+      m_event_thread(std::thread(&GLX11Window::XEventThread, this))
+{
+}
+
+GLX11Window::~GLX11Window()
+{
+  Window window = m_window;
+  m_window = None;
+  if (m_event_thread.joinable())
+    m_event_thread.join();
+  XUnmapWindow(m_display, window);
+  XDestroyWindow(m_display, window);
+  XFreeColormap(m_display, m_color_map);
+}
+
+std::unique_ptr<GLX11Window> GLX11Window::Create(Display* display, Window parent_window,
+                                                 XVisualInfo* vi)
+{
+  // Set color map for the new window based on the visual.
+  Colormap color_map = XCreateColormap(display, parent_window, vi->visual, AllocNone);
+  XSetWindowAttributes attribs = {};
+  attribs.colormap = color_map;
+
+  // Get the dimensions from the parent window.
+  XWindowAttributes parent_attribs = {};
+  XGetWindowAttributes(display, parent_window, &parent_attribs);
+
+  // Create the window
+  Window window =
+      XCreateWindow(display, parent_window, 0, 0, parent_attribs.width, parent_attribs.height, 0,
+                    vi->depth, InputOutput, vi->visual, CWColormap, &attribs);
+  XSelectInput(display, parent_window, StructureNotifyMask);
+  XMapWindow(display, window);
+  XSync(display, True);
+
+  return std::make_unique<GLX11Window>(display, parent_window, color_map, window,
+                                       parent_attribs.width, parent_attribs.height);
+}
+
+void GLX11Window::XEventThread()
+{
+  // There's a potential race here on m_window. But this thread will disappear soon.
+  while (m_window)
+  {
+    XEvent event;
+    for (int num_events = XPending(m_display); num_events > 0; num_events--)
+    {
+      XNextEvent(m_display, &event);
+      switch (event.type)
+      {
+      case ConfigureNotify:
+      {
+        m_width = event.xconfigure.width;
+        m_height = event.xconfigure.height;
+        XResizeWindow(m_display, m_window, m_width, m_height);
+        g_main_gl_context->SetBackBufferDimensions(m_width, m_height);
+      }
+      break;
+      default:
+        break;
+      }
+    }
+    Common::SleepCurrentThread(20);
+  }
+}