vulkan-wsi-layer/wsi/wayland/present_wait_wayland.hpp

/*
 * Copyright (c) 2025 Arm Limited.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
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 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/**
 * @file present_wait_wayland.hpp
 *
 * @brief Contains the base class declaration for the VK_KHR_present_wait extension.
 */

#pragma once

#include <wsi/extensions/present_wait.hpp>
#include <wayland-client.h>

namespace wsi
{

namespace wayland
{

/**
 * @brief Present wait extension class
 *
 * This class defines the present wait extension
 * implementation.
 */
class wsi_ext_present_wait_wayland : public wsi::wsi_ext_present_wait
{
public:
   /**
    * @brief Constructs present ID class.
    *
    * @param present_id_extension Present ID extension that this class will use to query
    * the last delivered present ID for the swapchain. This extension pointer must outlive
    * this class.
    */
   wsi_ext_present_wait_wayland(wsi_ext_present_id &present_id_extension);

   /**
    * @brief Set the wayland dispatch object.
    *
    * @param m_display The Wayland display object
    * @param m_queue The Wayland queue object.
    */
   void set_wayland_dispatcher(wl_display *m_display, struct wl_event_queue *m_queue);

private:
   /**
    * @brief Backend specific implementation that will wait for the present ID to
    *        be updated.
    * @param present_id Present ID value to wait for.
    * @param timeout_in_ns Timeout in nanoseconds.
    * @return VK_SUCCESS if present ID value was updated to be above or equal to the requested wait value.
    *         Other error codes otherwise.
    */
   VkResult wait_for_update(uint64_t present_id, uint64_t timeout_in_ns) override;

private:
   /**
    * @brief Wayland display object.
    */
   wl_display *m_display{};

   /**
    * @brief Wayland queue object.
    */
   struct wl_event_queue *m_queue{};
};

} /* namespace wayland */
} /* namespace wsi */