Store index format and topology in drawcall, to accommodate GL

* D3D11 just latches the state from the input assembler state into the
  drawcall when it's being added. GL stores the state per-draw.

renderdocui/Interop/D3D11PipelineState.cs

@@ -77,14 +77,10 @@ namespace renderdoc
             public class IndexBuffer
             {
                 public ResourceId Buffer;
-                [CustomMarshalAs(CustomUnmanagedType.CustomClass)]
-                public ResourceFormat Format;
                 public UInt32 Offset;
             };
             [CustomMarshalAs(CustomUnmanagedType.CustomClass)]
             public IndexBuffer ibuffer;
-
-            public PrimitiveTopology Topology;
         };
         [CustomMarshalAs(CustomUnmanagedType.CustomClass)]
         public InputAssembler m_IA;

renderdocui/Interop/FetchInfo.cs

@@ -329,6 +329,9 @@ namespace renderdoc
         public UInt32 vertexOffset;
         public UInt32 instanceOffset;
 
+        public UInt32 indexByteWidth;
+        public PrimitiveTopology topology;
+
         public ResourceId context;
 
         public double duration;

renderdocui/Interop/GLPipelineState.cs

@@ -57,18 +57,7 @@ namespace renderdoc
             [CustomMarshalAs(CustomUnmanagedType.TemplatedArray)]
             public VertexBuffer[] vbuffers;
 
-            [StructLayout(LayoutKind.Sequential)]
-            public class IndexBuffer
-            {
-                public ResourceId Buffer;
-                [CustomMarshalAs(CustomUnmanagedType.CustomClass)]
-                public ResourceFormat Format;
-                public UInt32 Offset;
-            };
-            [CustomMarshalAs(CustomUnmanagedType.CustomClass)]
-            public IndexBuffer ibuffer;
-
-            public PrimitiveTopology Topology;
+            public ResourceId ibuffer;
         };
         [CustomMarshalAs(CustomUnmanagedType.CustomClass)]
         public VertexInputs m_VtxIn;