Common: Add DRM display helper class and GBM GL context

src/common/drm_display.h

@@ -0,0 +1,38 @@
+#pragma once
+#include "core/types.h"
+#include <array>
+#include <optional>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+class DRMDisplay
+{
+public:
+  DRMDisplay(int card = -1);
+  ~DRMDisplay();
+
+  bool Initialize();
+
+  int GetCardID() const { return m_card_id; }
+  int GetCardFD() const { return m_card_fd; }
+  u32 GetWidth() const { return m_mode->hdisplay; }
+  u32 GetHeight() const { return m_mode->vdisplay; }
+
+  std::optional<u32> AddBuffer(u32 width, u32 height, u32 format, u32 handle, u32 pitch, u32 offset);
+  void RemoveBuffer(u32 fb_id);
+  void PresentBuffer(u32 fb_id, bool wait_for_vsync);
+
+private:
+  enum : u32
+  {
+    MAX_BUFFERS = 5
+  };
+
+  bool TryOpeningCard(int card);
+
+  int m_card_id = 0;
+  int m_card_fd = -1;
+  u32 m_crtc_id = 0;
+  drmModeConnector* m_connector = nullptr;
+  drmModeModeInfo* m_mode = nullptr;
+};