1 files changed, 79 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Gpu/Engine/MethodCopyBuffer.cs b/Ryujinx.Graphics.Gpu/Engine/MethodCopyBuffer.cs
new file mode 100644
index 00000000..19ffb0e3
--- /dev/null
+++ b/Ryujinx.Graphics.Gpu/Engine/MethodCopyBuffer.cs
@@ -0,0 +1,79 @@
+using Ryujinx.Graphics.Gpu.State;
+using Ryujinx.Graphics.Texture;
+using System;
+
+namespace Ryujinx.Graphics.Gpu.Engine
+{
+    partial class Methods
+    {
+        private void CopyBuffer(int argument)
+        {
+            var cbp = _context.State.Get<CopyBufferParams>(MethodOffset.CopyBufferParams);
+
+            var swizzle = _context.State.Get<CopyBufferSwizzle>(MethodOffset.CopyBufferSwizzle);
+
+            bool srcLinear = (argument & (1 << 7)) != 0;
+            bool dstLinear = (argument & (1 << 8)) != 0;
+            bool copy2D    = (argument & (1 << 9)) != 0;
+
+            int size = cbp.XCount;
+
+            if (size == 0)
+            {
+                return;
+            }
+
+            if (copy2D)
+            {
+                // Buffer to texture copy.
+                int srcBpp = swizzle.UnpackSrcComponentsCount() * swizzle.UnpackComponentSize();
+                int dstBpp = swizzle.UnpackDstComponentsCount() * swizzle.UnpackComponentSize();
+
+                var dst = _context.State.Get<CopyBufferTexture>(MethodOffset.CopyBufferDstTexture);
+                var src = _context.State.Get<CopyBufferTexture>(MethodOffset.CopyBufferSrcTexture);
+
+                var srcCalculator = new OffsetCalculator(
+                    src.Width,
+                    src.Height,
+                    cbp.SrcStride,
+                    srcLinear,
+                    src.MemoryLayout.UnpackGobBlocksInY(),
+                    srcBpp);
+
+                var dstCalculator = new OffsetCalculator(
+                    dst.Width,
+                    dst.Height,
+                    cbp.DstStride,
+                    dstLinear,
+                    dst.MemoryLayout.UnpackGobBlocksInY(),
+                    dstBpp);
+
+                ulong srcBaseAddress = _context.MemoryManager.Translate(cbp.SrcAddress.Pack());
+                ulong dstBaseAddress = _context.MemoryManager.Translate(cbp.DstAddress.Pack());
+
+                for (int y = 0; y < cbp.YCount; y++)
+                for (int x = 0; x < cbp.XCount; x++)
+                {
+                    int srcOffset = srcCalculator.GetOffset(src.RegionX + x, src.RegionY + y);
+                    int dstOffset = dstCalculator.GetOffset(dst.RegionX + x, dst.RegionY + y);
+
+                    ulong srcAddress = srcBaseAddress + (ulong)srcOffset;
+                    ulong dstAddress = dstBaseAddress + (ulong)dstOffset;
+
+                    Span<byte> pixel = _context.PhysicalMemory.Read(srcAddress, (ulong)srcBpp);
+
+                    _context.PhysicalMemory.Write(dstAddress, pixel);
+                }
+            }
+            else
+            {
+                // Buffer to buffer copy.
+                _bufferManager.CopyBuffer(cbp.SrcAddress, cbp.DstAddress, (uint)size);
+
+                Span<byte> data = _context.MemoryAccessor.Read(cbp.SrcAddress.Pack(), (uint)size);
+
+                _context.MemoryAccessor.Write(cbp.DstAddress.Pack(), data);
+            }
+        }
+    }
+}
+\ No newline at end of file