Render basic geometry

Added GraphicsContext, SwapChain, Buffer, VertexBuffer, IndexBuffer and a basic DX11 implementation.

GlitchyEngine/src/Renderer/GraphicsContext.bf

@@ -0,0 +1,80 @@
+using GlitchyEngine.Math;
+
+namespace GlitchyEngine.Renderer
+{
+	public class RenderTarget;
+
+	//public abstract class GraphicsContext
+	public class GraphicsContext
+	{
+		//public abstract SwapChain SwapChain {get;}
+		public extern SwapChain SwapChain {get;}
+		
+		/**
+		 * The maximum number of simultaneous rendertargets supported. 
+		 */
+		//public static extern uint32 MaxRenderTargetCount();
+
+		//public abstract void Init();
+		public extern void Init();
+		
+		/**
+		 * Sets a rendertarget.
+		 * @param renderTarget The render target.
+		 * @param slot The slot to which the rendertarget will be bound.
+		 * @remarks When @RenderTarget is null the backbuffer will be bound.
+		 * 			@BindRenderTargets has to be called in order to bind the rendertargets.
+		 */
+		//public abstract void SetRenderTarget(RenderTarget renderTarget, int slot = 0);
+		public extern void SetRenderTarget(RenderTarget renderTarget, int slot = 0);
+
+		/**
+		 * Binds all.
+		 * @param renderTarget The render target.
+		 * @param slot The slot to which the rendertarget will be bound.
+		 * @remarks When @RenderTarget is null the backbuffer will be bound.
+		 */
+		//public abstract void BindRenderTargets(); // Todo: maybe do this automatically when a drawcall is issued
+		public extern void BindRenderTargets(); // Todo: maybe do this automatically when a drawcall is issued
+
+		/**
+		 * Sets all elements in the given render target to one value.
+		 * @param renderTarget The render target.
+		 * @param color The color to clear the render target with.
+		 * @remarks When @renderTarget is null the backbuffer will be cleared.
+		 */
+		//public abstract void ClearRenderTarget(RenderTarget renderTarget, ColorRGBA color);
+		public extern void ClearRenderTarget(RenderTarget renderTarget, ColorRGBA color);
+
+		//public abstract void SetViewport(Viewport viewport);
+
+		/**
+		 * Binds a VertexBuffer to the pipeline.
+		 * @param buffer The vertex buffer to bind.
+		 * 			Note: the buffer has to have BindFlags.Vertex!
+		 * @param slot The slot the vertex buffer will be bound to.
+		 * @param offset The offset in bytes from the start of the buffer.
+		 * @param stride The stride of the 
+		 */
+		public extern void SetVertexBuffer(uint32 slot, Buffer buffer, uint32 stride, uint32 offset = 0);
+
+		/**
+		 * Binds a VertexBuffer to the pipeline.
+		 */
+		public void SetVertexBuffer(uint32 slot, VertexBufferBinding binding)
+		{
+			SetVertexBuffer(slot, binding.Buffer, binding.Stride, binding.Offset);
+		}
+
+		public extern void Draw(uint32 vertexCount, uint32 startVertexIndex = 0);
+
+		public extern void DrawIndexed(uint32 indexCount, uint32 startIndexLocation = 0, int32 vertexOffset = 0);
+		
+		public void SetIndexBuffer(IndexBuffer indexBuffer, uint32 byteOffset = 0)
+		{
+			SetIndexBuffer(indexBuffer, indexBuffer.Format, byteOffset);
+		}
+
+		public extern void SetIndexBuffer(Buffer buffer, IndexFormat indexFormat = .Index16Bit, uint32 byteOffset = 0);
+	}
+}