1 files changed, 133 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Gpu/Engine/MethodDraw.cs b/Ryujinx.Graphics.Gpu/Engine/MethodDraw.cs
new file mode 100644
index 00000000..dd360113
--- /dev/null
+++ b/Ryujinx.Graphics.Gpu/Engine/MethodDraw.cs
@@ -0,0 +1,133 @@
+using Ryujinx.Graphics.Gpu.State;
+using Ryujinx.Graphics.Gpu.Image;
+
+namespace Ryujinx.Graphics.Gpu.Engine
+{
+    partial class Methods
+    {
+        private bool _drawIndexed;
+
+        private int _firstIndex;
+        private int _indexCount;
+
+        private bool _instancedHasState;
+        private bool _instancedIndexed;
+
+        private int _instancedFirstIndex;
+        private int _instancedFirstVertex;
+        private int _instancedFirstInstance;
+        private int _instancedIndexCount;
+        private int _instancedDrawStateFirst;
+        private int _instancedDrawStateCount;
+
+        private int _instanceIndex;
+
+        public PrimitiveType PrimitiveType { get; private set; }
+
+        private void DrawEnd(int argument)
+        {
+            UpdateState();
+
+            bool instanced = _vsUsesInstanceId || _isAnyVbInstanced;
+
+            if (instanced)
+            {
+                if (!_instancedHasState)
+                {
+                    _instancedHasState = true;
+
+                    _instancedIndexed = _drawIndexed;
+
+                    _instancedFirstIndex    = _firstIndex;
+                    _instancedFirstVertex   = _context.State.GetBaseVertex();
+                    _instancedFirstInstance = _context.State.GetBaseInstance();
+
+                    _instancedIndexCount = _indexCount;
+
+                    VertexBufferDrawState drawState = _context.State.GetVertexBufferDrawState();
+
+                    _instancedDrawStateFirst = drawState.First;
+                    _instancedDrawStateCount = drawState.Count;
+                }
+
+                return;
+            }
+
+            int firstInstance = _context.State.GetBaseInstance();
+
+            if (_drawIndexed)
+            {
+                _drawIndexed = false;
+
+                int firstVertex = _context.State.GetBaseVertex();
+
+                _context.Renderer.GraphicsPipeline.DrawIndexed(
+                    _indexCount,
+                    1,
+                    _firstIndex,
+                    firstVertex,
+                    firstInstance);
+            }
+            else
+            {
+                VertexBufferDrawState drawState = _context.State.GetVertexBufferDrawState();
+
+                _context.Renderer.GraphicsPipeline.Draw(
+                    drawState.Count,
+                    1,
+                    drawState.First,
+                    firstInstance);
+            }
+        }
+
+        private void DrawBegin(int argument)
+        {
+            PrimitiveType type = (PrimitiveType)(argument & 0xffff);
+
+            _context.Renderer.GraphicsPipeline.SetPrimitiveTopology(type.Convert());
+
+            PrimitiveType = type;
+
+            if ((argument & (1 << 26)) != 0)
+            {
+                _instanceIndex++;
+            }
+            else if ((argument & (1 << 27)) == 0)
+            {
+                _instanceIndex = 0;
+            }
+        }
+
+        private void SetIndexCount(int argument)
+        {
+            _drawIndexed = true;
+        }
+
+        public void PerformDeferredDraws()
+        {
+            // Perform any pending instanced draw.
+            if (_instancedHasState)
+            {
+                _instancedHasState = false;
+
+                if (_instancedIndexed)
+                {
+                    _context.Renderer.GraphicsPipeline.DrawIndexed(
+                        _instancedIndexCount,
+                        _instanceIndex + 1,
+                        _instancedFirstIndex,
+                        _instancedFirstVertex,
+                        _instancedFirstInstance);
+                }
+                else
+                {
+                    _context.Renderer.GraphicsPipeline.Draw(
+                        _instancedDrawStateCount,
+                        _instanceIndex + 1,
+                        _instancedDrawStateFirst,
+                        _instancedFirstInstance);
+                }
+            }
+        }
+    }
+}
+\ No newline at end of file