1 files changed, 177 insertions, 0 deletions
diff --git a/xbmc/windowing/gbm/GBMUtils.h b/xbmc/windowing/gbm/GBMUtils.h
new file mode 100644
index 0000000..291a93a
--- /dev/null
+++ b/xbmc/windowing/gbm/GBMUtils.h
@@ -0,0 +1,177 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include <memory>
+#include <queue>
+
+#include <gbm.h>
+
+namespace KODI
+{
+namespace WINDOWING
+{
+namespace GBM
+{
+
+/**
+ * @brief A wrapper for gbm c classes to allow OOP and RAII.
+ *
+ */
+class CGBMUtils
+{
+public:
+  CGBMUtils(const CGBMUtils&) = delete;
+  CGBMUtils& operator=(const CGBMUtils&) = delete;
+  CGBMUtils() = default;
+  ~CGBMUtils() = default;
+
+  /**
+   * @brief Create a gbm device for allocating buffers
+   *
+   * @param fd The file descriptor for a backend device
+   * @return true The device creation succeeded
+   * @return false The device creation failed
+   */
+  bool CreateDevice(int fd);
+
+  /**
+   * @brief A wrapper for gbm_device to allow OOP and RAII
+   *
+   */
+  class CGBMDevice
+  {
+  public:
+    CGBMDevice(const CGBMDevice&) = delete;
+    CGBMDevice& operator=(const CGBMDevice&) = delete;
+    explicit CGBMDevice(gbm_device* device);
+    ~CGBMDevice() = default;
+
+    /**
+     * @brief Create a gbm surface
+     *
+     * @param width The width to use for the surface
+     * @param height The height to use for the surface
+     * @param format The format to use for the surface
+     * @param modifiers The modifiers to use for the surface
+     * @param modifiers_count The amount of modifiers in the modifiers param
+     * @return true The surface creation succeeded
+     * @return false The surface creation failed
+     */
+    bool CreateSurface(int width,
+                       int height,
+                       uint32_t format,
+                       const uint64_t* modifiers,
+                       const int modifiers_count);
+
+    /**
+     * @brief Get the underlying gbm_device
+     *
+     * @return gbm_device* A pointer to the underlying gbm_device
+     */
+    gbm_device* Get() const { return m_device; }
+
+    /**
+     * @brief A wrapper for gbm_surface to allow OOP and RAII
+     *
+     */
+    class CGBMSurface
+    {
+    public:
+      CGBMSurface(const CGBMSurface&) = delete;
+      CGBMSurface& operator=(const CGBMSurface&) = delete;
+      explicit CGBMSurface(gbm_surface* surface);
+      ~CGBMSurface() = default;
+
+      /**
+       * @brief Get the underlying gbm_surface
+       *
+       * @return gbm_surface* A pointer to the underlying gbm_surface
+       */
+      gbm_surface* Get() const { return m_surface; }
+
+      /**
+       * @brief A wrapper for gbm_bo to allow OOP and RAII
+       *
+       */
+      class CGBMSurfaceBuffer
+      {
+      public:
+        CGBMSurfaceBuffer(const CGBMSurfaceBuffer&) = delete;
+        CGBMSurfaceBuffer& operator=(const CGBMSurfaceBuffer&) = delete;
+        explicit CGBMSurfaceBuffer(gbm_surface* surface);
+        ~CGBMSurfaceBuffer();
+
+        /**
+         * @brief Get the underlying gbm_bo
+         *
+         * @return gbm_bo* A pointer to the underlying gbm_bo
+         */
+        gbm_bo* Get() const { return m_buffer; }
+
+      private:
+        gbm_surface* m_surface{nullptr};
+        gbm_bo* m_buffer{nullptr};
+      };
+
+      /**
+       * @brief Lock the surface's current front buffer.
+       *
+       * @return CGBMSurfaceBuffer* A pointer to a CGBMSurfaceBuffer object
+       */
+      CGBMSurfaceBuffer* LockFrontBuffer();
+
+    private:
+      gbm_surface* m_surface{nullptr};
+      std::queue<std::unique_ptr<CGBMSurfaceBuffer>> m_buffers;
+    };
+
+    /**
+     * @brief Get the CGBMSurface object
+     *
+     * @return CGBMSurface* A pointer to the CGBMSurface object
+     */
+    CGBMDevice::CGBMSurface* GetSurface() const { return m_surface.get(); }
+
+  private:
+    gbm_device* m_device{nullptr};
+
+    struct CGBMSurfaceDeleter
+    {
+      void operator()(CGBMSurface* p) const
+      {
+        if (p)
+          gbm_surface_destroy(p->Get());
+      }
+    };
+    std::unique_ptr<CGBMSurface, CGBMSurfaceDeleter> m_surface;
+  };
+
+  /**
+   * @brief Get the CGBMDevice object
+   *
+   * @return CGBMDevice* A pointer to the CGBMDevice object
+   */
+  CGBMUtils::CGBMDevice* GetDevice() const { return m_device.get(); }
+
+private:
+  struct CGBMDeviceDeleter
+  {
+    void operator()(CGBMDevice* p) const
+    {
+      if (p)
+        gbm_device_destroy(p->Get());
+    }
+  };
+  std::unique_ptr<CGBMDevice, CGBMDeviceDeleter> m_device;
+};
+
+}
+}
+}