SkiaSharp.SKMatrix.Concat C# (CSharp) Method

        public static void Concat(ref SKMatrix target, SKMatrix first, SKMatrix second)
        {
            SkiaApi.sk_matrix_concat(ref target, ref first, ref second);
        }

        private SKMatrix ReadTransform(string raw)
        {
            var t = SKMatrix.MakeIdentity();

            if (string.IsNullOrWhiteSpace(raw))
            {
                return(t);
            }

            var calls = raw.Trim().Split(new[] { ')' }, StringSplitOptions.RemoveEmptyEntries);

            foreach (var c in calls)
            {
                var args = c.Split(new[] { '(', ',', ' ', '\t', '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
                var nt   = SKMatrix.MakeIdentity();
                switch (args[0])
                {
                case "matrix":
                    if (args.Length == 7)
                    {
                        nt.Values = new float[]
                        {
                            ReadNumber(args[1]), ReadNumber(args[3]), ReadNumber(args[5]),
                            ReadNumber(args[2]), ReadNumber(args[4]), ReadNumber(args[6]),
                            0, 0, 1
                        };
                    }
                    else
                    {
                        LogOrThrow($"Matrices are expected to have 6 elements, this one has {args.Length - 1}");
                    }
                    break;

                case "translate":
                    if (args.Length >= 3)
                    {
                        nt = SKMatrix.MakeTranslation(ReadNumber(args[1]), ReadNumber(args[2]));
                    }
                    else if (args.Length >= 2)
                    {
                        nt = SKMatrix.MakeTranslation(ReadNumber(args[1]), 0);
                    }
                    break;

                case "scale":
                    if (args.Length >= 3)
                    {
                        nt = SKMatrix.MakeScale(ReadNumber(args[1]), ReadNumber(args[2]));
                    }
                    else if (args.Length >= 2)
                    {
                        var sx = ReadNumber(args[1]);
                        nt = SKMatrix.MakeScale(sx, sx);
                    }
                    break;

                case "rotate":
                    var a = ReadNumber(args[1]);
                    if (args.Length >= 4)
                    {
                        var x  = ReadNumber(args[2]);
                        var y  = ReadNumber(args[3]);
                        var t1 = SKMatrix.MakeTranslation(x, y);
                        var t2 = SKMatrix.MakeRotationDegrees(a);
                        var t3 = SKMatrix.MakeTranslation(-x, -y);
                        SKMatrix.Concat(ref nt, ref t1, ref t2);
                        SKMatrix.Concat(ref nt, ref nt, ref t3);
                    }
                    else
                    {
                        nt = SKMatrix.MakeRotationDegrees(a);
                    }
                    break;

                default:
                    LogOrThrow($"Can't transform {args[0]}");
                    break;
                }
                SKMatrix.Concat(ref t, ref t, ref nt);
            }

            return(t);
        }