Initial work

1 files changed, 74 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.OpenGL/Buffer.cs b/Ryujinx.Graphics.OpenGL/Buffer.cs
new file mode 100644
index 00000000..b86719ce
--- /dev/null
+++ b/Ryujinx.Graphics.OpenGL/Buffer.cs
@@ -0,0 +1,74 @@
+using OpenTK.Graphics.OpenGL;
+using Ryujinx.Graphics.GAL;
+using System;
+
+namespace Ryujinx.Graphics.OpenGL
+{
+    class Buffer : IBuffer
+    {
+        public int Handle { get; }
+
+        public Buffer(int size)
+        {
+            Handle = GL.GenBuffer();
+
+            GL.BindBuffer(BufferTarget.CopyWriteBuffer, Handle);
+            GL.BufferData(BufferTarget.CopyWriteBuffer, size, IntPtr.Zero, BufferUsageHint.DynamicDraw);
+        }
+
+        public void CopyTo(IBuffer destination, int srcOffset, int dstOffset, int size)
+        {
+            GL.BindBuffer(BufferTarget.CopyReadBuffer, Handle);
+            GL.BindBuffer(BufferTarget.CopyWriteBuffer, ((Buffer)destination).Handle);
+
+            GL.CopyBufferSubData(
+                BufferTarget.CopyReadBuffer,
+                BufferTarget.CopyWriteBuffer,
+                (IntPtr)srcOffset,
+                (IntPtr)dstOffset,
+                (IntPtr)size);
+        }
+
+        public byte[] GetData(int offset, int size)
+        {
+            GL.BindBuffer(BufferTarget.CopyReadBuffer, Handle);
+
+            byte[] data = new byte[size];
+
+            GL.GetBufferSubData(BufferTarget.CopyReadBuffer, (IntPtr)offset, size, data);
+
+            return data;
+        }
+
+        public void SetData(Span<byte> data)
+        {
+            unsafe
+            {
+                GL.BindBuffer(BufferTarget.CopyWriteBuffer, Handle);
+
+                fixed (byte* ptr = data)
+                {
+                    GL.BufferData(BufferTarget.CopyWriteBuffer, data.Length, (IntPtr)ptr, BufferUsageHint.DynamicDraw);
+                }
+            }
+        }
+
+        public void SetData(int offset, Span<byte> data)
+        {
+            GL.BindBuffer(BufferTarget.CopyWriteBuffer, Handle);
+
+            unsafe
+            {
+                fixed (byte* ptr = data)
+                {
+                    GL.BufferSubData(BufferTarget.CopyWriteBuffer, (IntPtr)offset, data.Length, (IntPtr)ptr);
+                }
+            }
+        }
+
+        public void Dispose()
+        {
+            GL.DeleteBuffer(Handle);
+        }
+    }
+}