DolphinNoGUI: Add a FBDev platform

And the associated GLContext bits

Source/Core/DolphinNoGUI/PlatformFBDev.cpp

@@ -0,0 +1,102 @@
+// Copyright 2018 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <unistd.h>
+
+#include "DolphinNoGUI/Platform.h"
+
+#include "Common/MsgHandler.h"
+#include "Core/ConfigManager.h"
+#include "Core/Core.h"
+#include "Core/State.h"
+
+#include <climits>
+#include <cstdio>
+
+#include <fcntl.h>
+#include <linux/fb.h>
+#include <linux/kd.h>
+#include <linux/vt.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <termios.h>
+#include <unistd.h>
+#include "VideoCommon/RenderBase.h"
+
+namespace
+{
+class PlatformFBDev : public Platform
+{
+public:
+  ~PlatformFBDev() override;
+
+  bool Init() override;
+  void SetTitle(const std::string& string) override;
+  void MainLoop() override;
+
+  WindowSystemInfo GetWindowSystemInfo() const;
+
+private:
+  bool OpenFramebuffer();
+
+  int m_fb_fd = -1;
+};
+
+PlatformFBDev::~PlatformFBDev()
+{
+  if (m_fb_fd >= 0)
+    close(m_fb_fd);
+}
+
+bool PlatformFBDev::Init()
+{
+  if (!OpenFramebuffer())
+    return false;
+
+  return true;
+}
+
+bool PlatformFBDev::OpenFramebuffer()
+{
+  m_fb_fd = open("/dev/fb0", O_RDWR);
+  if (m_fb_fd < 0)
+  {
+    std::fprintf(stderr, "open(/dev/fb0) failed\n");
+    return false;
+  }
+
+  return true;
+}
+
+void PlatformFBDev::SetTitle(const std::string& string)
+{
+  std::fprintf(stdout, "%s\n", string.c_str());
+}
+
+void PlatformFBDev::MainLoop()
+{
+  while (IsRunning())
+  {
+    UpdateRunningFlag();
+    Core::HostDispatchJobs();
+
+    // TODO: Is this sleep appropriate?
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+}
+
+WindowSystemInfo PlatformFBDev::GetWindowSystemInfo() const
+{
+  WindowSystemInfo wsi;
+  wsi.type = WindowSystemType::FBDev;
+  wsi.display_connection = nullptr;  // EGL_DEFAULT_DISPLAY
+  wsi.render_surface = nullptr;
+  return wsi;
+}
+}  // namespace
+
+std::unique_ptr<Platform> Platform::CreateFBDevPlatform()
+{
+  return std::make_unique<PlatformFBDev>();
+}