internal static void CheckRectangle(Brush brush, Pen pen, Rect rectangle, int width, int height, [CallerMemberName] string methodName = "unknown") { Application.EnableMSAA = false; MeshBuffer meshBuffer = new MeshBuffer(); MeshList meshList = new MeshList(); BuiltinGeometryRenderer renderer = new BuiltinGeometryRenderer(); byte[] bytes; using (var context = new RenderContextForTest(width, height)) { renderer.OnBeforeRead(); renderer.DrawRectangle(brush, pen, rectangle);//This must be called after the RenderContextForTest is created, for uploading textures to GPU via OpenGL. renderer.OnAfterRead(meshList); //rebuild mesh buffer meshBuffer.Clear(); meshBuffer.Init(); meshBuffer.Append(meshList); //draw mesh buffer to screen context.Clear(); context.DrawMeshes(meshBuffer); bytes = context.GetRenderedRawBytes(); } Util.CheckExpectedImage(bytes, width, height, $"{RootDir}{nameof(DrawRectangle)}\\{methodName}.png"); }