1 files changed, 79 insertions, 0 deletions
diff --git a/Ryujinx.Graphics/Gpu/NsGpuPBEntry.cs b/Ryujinx.Graphics/Gpu/NsGpuPBEntry.cs
new file mode 100644
index 00000000..8063651a
--- /dev/null
+++ b/Ryujinx.Graphics/Gpu/NsGpuPBEntry.cs
@@ -0,0 +1,79 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.IO;
+
+namespace Ryujinx.Graphics.Gpu
+{
+    public struct NsGpuPBEntry
+    {
+        public NsGpuRegister Register { get; private set; }
+
+        public int SubChannel { get; private set; }
+
+        private int[] m_Arguments;
+
+        public ReadOnlyCollection<int> Arguments => Array.AsReadOnly(m_Arguments);
+
+        public NsGpuPBEntry(NsGpuRegister Register, int SubChannel, params int[] Arguments)
+        {
+            this.Register    = Register;
+            this.SubChannel  = SubChannel;
+            this.m_Arguments = Arguments;
+        }
+
+        public static NsGpuPBEntry[] DecodePushBuffer(byte[] Data)
+        {
+            using (MemoryStream MS = new MemoryStream(Data))
+            {
+                BinaryReader Reader = new BinaryReader(MS);
+
+                List<NsGpuPBEntry> GpFifos = new List<NsGpuPBEntry>();
+
+                bool CanRead() => MS.Position + 4 <= MS.Length;
+
+                while (CanRead())
+                {
+                    int Packed = Reader.ReadInt32();
+
+                    int Reg  = (Packed << 2)  & 0x7ffc;
+                    int SubC = (Packed >> 13) & 7;
+                    int Args = (Packed >> 16) & 0x1fff;
+                    int Mode = (Packed >> 29) & 7;
+
+                    if (Mode == 4)
+                    {
+                        //Inline Mode.
+                        GpFifos.Add(new NsGpuPBEntry((NsGpuRegister)Reg, SubC, Args));
+                    }
+                    else
+                    {
+                        //Word mode.
+                        if (Mode == 1)
+                        {
+                            //Sequential Mode.
+                            for (int Index = 0; Index < Args && CanRead(); Index++, Reg += 4)
+                            {
+                                GpFifos.Add(new NsGpuPBEntry((NsGpuRegister)Reg, SubC, Reader.ReadInt32()));
+                            }
+                        }
+                        else
+                        {
+                            //Non-Sequential Mode.
+                            int[] Arguments = new int[Args];
+
+                            for (int Index = 0; Index < Args && CanRead(); Index++)
+                            {
+                                Arguments[Index] = Reader.ReadInt32();
+                            }
+
+                            GpFifos.Add(new NsGpuPBEntry((NsGpuRegister)Reg, SubC, Arguments));
+                        }
+                    }
+                }
+
+                return GpFifos.ToArray();
+            }
+        }
+    }
+}
+\ No newline at end of file