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src/core/hle/service/nvflinger/nvflinger.h

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+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <atomic>
+#include <memory>
+#include <mutex>
+#include <optional>
+#include <string>
+#include <string_view>
+#include <thread>
+#include <vector>
+
+#include "common/common_types.h"
+#include "core/hle/kernel/object.h"
+
+namespace Common {
+class Event;
+} // namespace Common
+
+namespace Core::Timing {
+class CoreTiming;
+struct EventType;
+} // namespace Core::Timing
+
+namespace Kernel {
+class ReadableEvent;
+class WritableEvent;
+} // namespace Kernel
+
+namespace Service::Nvidia {
+class Module;
+} // namespace Service::Nvidia
+
+namespace Service::VI {
+class Display;
+class Layer;
+} // namespace Service::VI
+
+namespace Service::NVFlinger {
+
+class BufferQueue;
+
+class NVFlinger final {
+public:
+    explicit NVFlinger(Core::System& system);
+    ~NVFlinger();
+
+    /// Sets the NVDrv module instance to use to send buffers to the GPU.
+    void SetNVDrvInstance(std::shared_ptr<Nvidia::Module> instance);
+
+    /// Opens the specified display and returns the ID.
+    ///
+    /// If an invalid display name is provided, then an empty optional is returned.
+    [[nodiscard]] std::optional<u64> OpenDisplay(std::string_view name);
+
+    /// Creates a layer on the specified display and returns the layer ID.
+    ///
+    /// If an invalid display ID is specified, then an empty optional is returned.
+    [[nodiscard]] std::optional<u64> CreateLayer(u64 display_id);
+
+    /// Closes a layer on all displays for the given layer ID.
+    void CloseLayer(u64 layer_id);
+
+    /// Finds the buffer queue ID of the specified layer in the specified display.
+    ///
+    /// If an invalid display ID or layer ID is provided, then an empty optional is returned.
+    [[nodiscard]] std::optional<u32> FindBufferQueueId(u64 display_id, u64 layer_id) const;
+
+    /// Gets the vsync event for the specified display.
+    ///
+    /// If an invalid display ID is provided, then nullptr is returned.
+    [[nodiscard]] std::shared_ptr<Kernel::ReadableEvent> FindVsyncEvent(u64 display_id) const;
+
+    /// Obtains a buffer queue identified by the ID.
+    [[nodiscard]] BufferQueue* FindBufferQueue(u32 id);
+
+    /// Performs a composition request to the emulated nvidia GPU and triggers the vsync events when
+    /// finished.
+    void Compose();
+
+    [[nodiscard]] s64 GetNextTicks() const;
+
+private:
+    [[nodiscard]] std::unique_lock<std::mutex> Lock() const {
+        return std::unique_lock{*guard};
+    }
+
+    /// Finds the display identified by the specified ID.
+    [[nodiscard]] VI::Display* FindDisplay(u64 display_id);
+
+    /// Finds the display identified by the specified ID.
+    [[nodiscard]] const VI::Display* FindDisplay(u64 display_id) const;
+
+    /// Finds the layer identified by the specified ID in the desired display.
+    [[nodiscard]] VI::Layer* FindLayer(u64 display_id, u64 layer_id);
+
+    /// Finds the layer identified by the specified ID in the desired display.
+    [[nodiscard]] const VI::Layer* FindLayer(u64 display_id, u64 layer_id) const;
+
+    static void VSyncThread(NVFlinger& nv_flinger);
+
+    void SplitVSync();
+
+    std::shared_ptr<Nvidia::Module> nvdrv;
+
+    std::vector<VI::Display> displays;
+    std::vector<std::unique_ptr<BufferQueue>> buffer_queues;
+
+    /// Id to use for the next layer that is created, this counter is shared among all displays.
+    u64 next_layer_id = 1;
+    /// Id to use for the next buffer queue that is created, this counter is shared among all
+    /// layers.
+    u32 next_buffer_queue_id = 1;
+
+    u32 swap_interval = 1;
+
+    /// Event that handles screen composition.
+    std::shared_ptr<Core::Timing::EventType> composition_event;
+
+    std::shared_ptr<std::mutex> guard;
+
+    Core::System& system;
+
+    std::unique_ptr<std::thread> vsync_thread;
+    std::unique_ptr<Common::Event> wait_event;
+    std::atomic<bool> is_running{};
+};
+
+} // namespace Service::NVFlinger