1 files changed, 82 insertions, 0 deletions
diff --git a/src/core/hle/service/nvflinger/buffer_queue.h b/src/core/hle/service/nvflinger/buffer_queue.h
new file mode 100644
index 000000000..5c6719407
--- /dev/null
+++ b/src/core/hle/service/nvflinger/buffer_queue.h
@@ -0,0 +1,82 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+#include <boost/optional.hpp>
+#include "common/swap.h"
+#include "core/hle/kernel/event.h"
+
+namespace CoreTiming {
+struct EventType;
+}
+
+namespace Service {
+namespace NVFlinger {
+
+struct IGBPBuffer {
+    u32_le magic;
+    u32_le width;
+    u32_le height;
+    u32_le stride;
+    u32_le format;
+    u32_le usage;
+    INSERT_PADDING_WORDS(1);
+    u32_le index;
+    INSERT_PADDING_WORDS(3);
+    u32_le gpu_buffer_id;
+    INSERT_PADDING_WORDS(17);
+    u32_le nvmap_handle;
+    u32_le offset;
+    INSERT_PADDING_WORDS(60);
+};
+
+static_assert(sizeof(IGBPBuffer) == 0x16C, "IGBPBuffer has wrong size");
+
+class BufferQueue final {
+public:
+    enum class QueryType {
+        NativeWindowWidth = 0,
+        NativeWindowHeight = 1,
+        NativeWindowFormat = 2,
+    };
+
+    BufferQueue(u32 id, u64 layer_id);
+    ~BufferQueue() = default;
+
+    struct Buffer {
+        enum class Status { Free = 0, Queued = 1, Dequeued = 2, Acquired = 3 };
+
+        u32 slot;
+        Status status = Status::Free;
+        IGBPBuffer igbp_buffer;
+    };
+
+    void SetPreallocatedBuffer(u32 slot, IGBPBuffer& buffer);
+    u32 DequeueBuffer(u32 pixel_format, u32 width, u32 height);
+    const IGBPBuffer& RequestBuffer(u32 slot) const;
+    void QueueBuffer(u32 slot);
+    boost::optional<const Buffer&> AcquireBuffer();
+    void ReleaseBuffer(u32 slot);
+    u32 Query(QueryType type);
+
+    u32 GetId() const {
+        return id;
+    }
+
+    Kernel::SharedPtr<Kernel::Event> GetNativeHandle() const {
+        return native_handle;
+    }
+
+private:
+    u32 id;
+    u64 layer_id;
+
+    std::vector<Buffer> queue;
+    Kernel::SharedPtr<Kernel::Event> native_handle;
+};
+
+} // namespace NVFlinger
+} // namespace Service