Implement GPU scissors (#1058)

* Implement GPU scissors

* Remove unused using

* Add missing changes for Clear

Ryujinx.Graphics.Gpu/State/GpuStateTable.cs

@@ -57,6 +57,7 @@ namespace Ryujinx.Graphics.Gpu.State
             new TableItem(MethodOffset.ViewportExtents,        typeof(ViewportExtents),       8),
             new TableItem(MethodOffset.VertexBufferDrawState,  typeof(VertexBufferDrawState), 1),
             new TableItem(MethodOffset.DepthBiasState,         typeof(DepthBiasState),        1),
+            new TableItem(MethodOffset.ScissorState,           typeof(ScissorState),          8),
             new TableItem(MethodOffset.StencilBackMasks,       typeof(StencilBackMasks),      1),
             new TableItem(MethodOffset.RtDepthStencilState,    typeof(RtDepthStencilState),   1),
             new TableItem(MethodOffset.VertexAttribState,      typeof(VertexAttribState),     16),

Ryujinx.Graphics.Gpu/State/MethodOffset.cs

@@ -33,6 +33,7 @@ namespace Ryujinx.Graphics.Gpu.State
         ClearStencilValue               = 0x368,
         DepthBiasState                  = 0x370,
         TextureBarrier                  = 0x378,
+        ScissorState                    = 0x380,
         StencilBackMasks                = 0x3d5,
         InvalidateTextures              = 0x3dd,
         TextureBarrierTiled             = 0x3df,

Ryujinx.Graphics.Gpu/State/ScissorState.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.Graphics.Gpu.State
+{
+    struct ScissorState
+    {
+        public Boolean32 Enable;
+        public ushort X1;
+        public ushort X2;
+        public ushort Y1;
+        public ushort Y2;
+        public uint Padding;
+    }
+}