add indirect draw command struct

Updates RasterizerState and BlendFactor for the ABI changes introduced in [this PR](MoonsideGames/Refresh#27).

Reviewed-on: MoonsideGames/RefreshCS#4
Co-authored-by: TheSpydog <thespydog@noreply.example.org>
Co-committed-by: TheSpydog <thespydog@noreply.example.org>

src/Refresh.cs

@@ -250,11 +250,7 @@ namespace RefreshCS
 			OneMinusDestinationAlpha,
 			ConstantColor,
 			OneMinusConstantColor,
-			SourceAlphaSaturate,
+			SourceAlphaSaturate
-			SourceOneColor,
-			OneMinusSourceOneColor,
-			SourceOneAlpha,
-			OneMinusSourceOneAlpha
 		}
 
 		[Flags]
@@ -371,6 +367,15 @@ namespace RefreshCS
 			public uint level;
 		}
 
+		[StructLayout(LayoutKind.Sequential)]
+		public struct IndirectDrawCommand
+		{
+			public uint vertexCount;
+			public uint instanceCount;
+			public uint firstVertex;
+			public uint firstInstance;
+		}
+
 		[StructLayout(LayoutKind.Sequential)]
 		public struct SamplerStateCreateInfo
 		{
@@ -484,7 +489,6 @@ namespace RefreshCS
 		[StructLayout(LayoutKind.Sequential)]
 		public struct RasterizerState
 		{
-			public byte depthClampEnable;
 			public FillMode fillMode;
 			public CullMode cullMode;
 			public FrontFace frontFace;