Initial work

Ryujinx.Graphics.Gpu/Engine/MethodClear.cs

@@ -0,0 +1,55 @@
+using Ryujinx.Graphics.GAL.Color;
+using Ryujinx.Graphics.Gpu.State;
+
+namespace Ryujinx.Graphics.Gpu.Engine
+{
+    partial class Methods
+    {
+        private void Clear(int argument)
+        {
+            UpdateState();
+
+            bool clearDepth   = (argument & 1) != 0;
+            bool clearStencil = (argument & 2) != 0;
+
+            uint componentMask = (uint)((argument >> 2) & 0xf);
+
+            int index = (argument >> 6) & 0xf;
+
+            if (componentMask != 0)
+            {
+                ClearColors clearColor = _context.State.GetClearColors();
+
+                ColorF color = new ColorF(
+                    clearColor.Red,
+                    clearColor.Green,
+                    clearColor.Blue,
+                    clearColor.Alpha);
+
+                _context.Renderer.GraphicsPipeline.ClearRenderTargetColor(
+                    index,
+                    componentMask,
+                    color);
+            }
+
+            if (clearDepth || clearStencil)
+            {
+                float depthValue   = _context.State.GetClearDepthValue();
+                int   stencilValue = _context.State.GetClearStencilValue();
+
+                int stencilMask = 0;
+
+                if (clearStencil)
+                {
+                    stencilMask = _context.State.GetStencilTestState().FrontMask;
+                }
+
+                _context.Renderer.GraphicsPipeline.ClearRenderTargetDepthStencil(
+                    depthValue,
+                    clearDepth,
+                    stencilValue,
+                    stencilMask);
+            }
+        }
+    }
+}