public override void Init()
{
var width = RenderContext.Current.ScreenPixelSize.X;
var height = RenderContext.Current.ScreenPixelSize.Y;
GBuffer = new FrameBuffer(width, height);
GBuffer.ObjectLabel = nameof(GBuffer);
//GBuffer.InitNormal();
// R11fG11fB10f --> rgba16f
// Warning: R11fG11fB10f has no sign bit!
GPosition = new RendererTexture(nameof(GPosition), TextureTarget.Texture2D, 0, PixelInternalFormat.Rgb16f, width, height, 0, PixelFormat.Rgb, PixelType.Float, IntPtr.Zero);
GPosition.SetNearestFilter();
GBuffer.DestinationTextures.Add(GPosition);
GBuffer.BindTexture(GPosition, FramebufferAttachment.ColorAttachment0);
GNormal = new RendererTexture(nameof(GNormal), TextureTarget.Texture2D, 0, PixelInternalFormat.Rgb16f, width, height, 0, PixelFormat.Rgb, PixelType.Float, IntPtr.Zero);
GNormal.SetNearestFilter();
GBuffer.DestinationTextures.Add(GNormal);
GBuffer.BindTexture(GNormal, FramebufferAttachment.ColorAttachment1);
GAlbedoSpec = new RendererTexture(nameof(GAlbedoSpec), TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
GAlbedoSpec.SetNearestFilter();
GBuffer.DestinationTextures.Add(GAlbedoSpec);
GBuffer.BindTexture(GAlbedoSpec, FramebufferAttachment.ColorAttachment2);
GMaterial = new RendererTexture(nameof(GMaterial), TextureTarget.Texture2D, 0, PixelInternalFormat.R11fG11fB10f, width, height, 0, PixelFormat.Rgb, PixelType.Float, IntPtr.Zero);
GMaterial.SetNearestFilter();
GBuffer.DestinationTextures.Add(GMaterial);
GBuffer.BindTexture(GMaterial, FramebufferAttachment.ColorAttachment3);
GL.DrawBuffers(4, new DrawBuffersEnum[]
{
DrawBuffersEnum.ColorAttachment0,
DrawBuffersEnum.ColorAttachment1,
DrawBuffersEnum.ColorAttachment2,
DrawBuffersEnum.ColorAttachment3,
});
// var rboDepth = new RenderBuffer(gBuffer, RenderbufferStorage.DepthComponent, FramebufferAttachment.DepthAttachment);
// rboDepth.ObjectLabel = nameof(rboDepth);
// Attach default Forward Depth Buffer to this Framebuffer, so both share the same depth informations.
var fwPipe = RenderContext.Current.GetPipeline <ForwardRenderPipeline>();
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, fwPipe.FrameBuffer.RenderBuffer.Handle);
GBuffer.Check();
_DefLightShader = new RendererShader("Shaders/deferred-shading.vert", "Shaders/deferred-shading.frag", null, false);
if (Renderer.Current.UseShadows)
{
_DefLightShader.SetDefine("USE_SHADOW");
}
_DefLightShader.Compile();
_DefLightShader.SetInt("gPosition", 0);
_DefLightShader.SetInt("gNormal", 1);
_DefLightShader.SetInt("gAlbedoSpec", 2);
_DefLightShader.SetInt("gMaterial", 3);
vbo = new VertexBufferObject();
vbo.Create();
vbo.Bind();
var layout = VertexLayoutDefinition.CreateDefinitionFromVertexStruct <VertexDataPos2UV>();
vao = new VertexArrayObject(layout.BindToShader(_DefLightShader), vbo);
vao.Create();
vao.SetData(BufferData.Create(_vertices));
}