Added GeometryBinding

GlitchyEngine/src/Renderer/GeometryBinding.bf

@@ -0,0 +1,83 @@
+using System;
+using System.Collections;
+
+namespace GlitchyEngine.Renderer
+{
+	public class GeometryBinding
+	{
+		internal List<VertexBufferBinding> _vertexBuffers = new .() ~ delete _;
+		internal IndexBuffer _indexBuffer;
+		internal VertexLayout _vertexLayout;
+		internal uint32 _indexByteOffset;
+		internal uint32 _indexCount;
+		internal PrimitiveTopology _primitiveTopology;
+
+		public VertexBufferBinding GetVertexBuffer(uint32 slot)
+		{
+			return _vertexBuffers[slot];
+		}
+
+		public IndexBuffer GetIndexBuffer()
+		{
+			return _indexBuffer;
+		}
+		
+		public VertexLayout GetVertexLayout()
+		{
+			return _vertexLayout;
+		}
+
+		[Inline]
+		public uint32 IndexByteOffset => _indexByteOffset;
+
+		[Inline]
+		public uint32 IndexCount => _indexCount;
+
+		[Inline]
+		public PrimitiveTopology PrimitiveTopology => _primitiveTopology;
+
+		public void SetVertexBufferSlot(VertexBufferBinding vertexBufferBinding, uint32 slot)
+		{
+			_vertexBuffers.Add(vertexBufferBinding);
+
+			PlatformSetVertexBuffer(vertexBufferBinding, slot);
+		}
+
+		protected extern void PlatformSetVertexBuffer(VertexBufferBinding vertexBuffer, uint32 slot);
+
+		public void SetVertexLayout(VertexLayout vertexLayout)
+		{
+			_vertexLayout = vertexLayout;
+			PlatformSetVertexLayout(vertexLayout);
+		}
+		
+		protected extern void PlatformSetVertexLayout(VertexLayout layout);
+
+		public void SetPrimitiveTopology(PrimitiveTopology topology)
+		{
+			_primitiveTopology = topology;
+			PlatformSetPrimitiveTopology(topology);
+		}
+
+		protected extern void PlatformSetPrimitiveTopology(PrimitiveTopology topology);
+
+		public void SetIndexBuffer(IndexBuffer indexBuffer, uint32 byteOffset = 0, uint32 indexCount = (.)-1)
+		{
+			_indexBuffer = indexBuffer;
+			_indexByteOffset = byteOffset;
+
+			if(indexCount == (.)-1)
+			{
+				_indexCount = _indexBuffer.IndexCount - (uint32)(_indexByteOffset / _indexBuffer.Format.IndexSize);
+			}
+			else
+			{
+				_indexCount = indexCount;
+			}
+
+			PlatformSetIndexBuffer(indexBuffer);
+		}
+		
+		protected extern void PlatformSetIndexBuffer(IndexBuffer indexBuffer);
+	}
+}