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Aspose.PSD for .NET 21.11 - Release Notes

KeySummaryCategory
PSDNET-767Exception on adding the existing text layer to a layer groupBug
PSDNET-988IndexOutOfRangeException on TextLayer.UpdateTextBug
PSDNET-989Exported shapes have wrong coordinates in the result fileBug
PSDNET-1002Incorrect export of vector shape on folder exportBug

Public API Changes

Added APIs:

  • None

Removed APIs:

  • None

Usage examples:

PSDNET-767. Exception on adding the existing text layer to a layer group

            string outputPsd = "out_dummy_group.psd";

            var psdOptions = new PsdOptions()
            {
                Source = new StreamSource(new MemoryStream(), true),
                ColorMode = ColorModes.Rgb,
                ChannelsCount = 4,
                ChannelBitsCount = 8,
                CompressionMethod = CompressionMethod.RLE
            };
            using (PsdImage image = (PsdImage)Image.Create(psdOptions, 10, 15))
            {
                var group = image.AddLayerGroup("TestGroup", 0, true);
                var layer = image.AddTextLayer("Text", Rectangle.FromLeftTopRightBottom(-2, 3, 14, 17));
                group.AddLayer(layer);

                image.Save(outputPsd);
            }

PSDNET-988. IndexOutOfRangeException on TextLayer.UpdateText

            string srcFile = "M1TTTT16062021001.psd";
            string fontsFolder = "Fonts";
            string outputPng = "out_M1TTTT16062021001.png";

            FontSettings.SetFontsFolder(fontsFolder);
            FontSettings.UpdateFonts();

            string[] words = new[] { "Mom", "Stacy" };
            string[] fonts = new[] { "Caveat", "Gochi Hand", "Lobster", "Satisfy" };

            using (var image = (PsdImage)Image.Load(srcFile))
            {
                foreach (var layer in image.Layers)
                {
                    var txtLayer = layer as TextLayer;
                    if (txtLayer != null)
                    {
                        for (int w = 0; w < words.Length; w++)
                        {
                            for (int f = 0; f < fonts.Length; f++)
                            {
                                txtLayer.UpdateText(words[w]);
                                foreach (var txtItem in txtLayer.TextData.Items)
                                {
                                    txtItem.Style.FontName = FontSettings.GetAdobeFontName(fonts[f]);
                                }

                                txtLayer.TextData.UpdateLayerData();
                            }
                        }
                    }
                }

                image.Save(outputPng, new PngOptions() { ColorType = PngColorType.TruecolorWithAlpha });
            }

PSDNET-989. Exported shapes have wrong coordinates in the result file

        public void CreatingVectorPathExample()
        {
            string outputPsd = "outputPsd.psd";

            using (var psdImage = (PsdImage)Image.Create(new PsdOptions() { Source = new Sources.StreamSource(new MemoryStream()), }, 500, 500))
            {
                FillLayer layer = FillLayer.CreateInstance(PSD.FileFormats.Psd.Layers.FillSettings.FillType.Color);
                psdImage.AddLayer(layer);

                VectorPath vectorPath = VectorDataProvider.CreateVectorPathForLayer(layer);
                vectorPath.FillColor = Color.IndianRed;
                PathShape shape = new PathShape();
                shape.Points.Add(new BezierKnot(new PointF(50, 150), true));
                shape.Points.Add(new BezierKnot(new PointF(100, 200), true));
                shape.Points.Add(new BezierKnot(new PointF(0, 200), true));
                vectorPath.Shapes.Add(shape);
                VectorDataProvider.UpdateLayerFromVectorPath(layer, vectorPath, true);

                psdImage.Save(outputPsd);
            }
        }
    #region Vector path editor (Here placed classes for edit vector paths).

    /// <summary>
    /// The class that provides work between <see cref="Layer"/> and <see cref="VectorPath"/>.
    /// </summary>
    public static class VectorDataProvider
    {
        /// <summary>
        /// Creates the <see cref="VectorPath"/> instance based on resources from input layer.
        /// </summary>
        /// <param name="psdLayer">The psd layer.</param>
        /// <returns>the <see cref="VectorPath"/> instance based on resources from input layer.</returns>
        public static VectorPath CreateVectorPathForLayer(Layer psdLayer)
        {
            ValidateLayer(psdLayer);

            Size imageSize = psdLayer.Container.Size;

            VectorPathDataResource pathResource = FindVectorPathDataResource(psdLayer, true);
            SoCoResource socoResource = FindSoCoResource(psdLayer, true);
            VectorPath vectorPath = new VectorPath(pathResource, imageSize);
            if (socoResource != null)
            {
                vectorPath.FillColor = socoResource.Color;
            }

            return vectorPath;
        }

        /// <summary>
        /// Updates the input layer resources from <see cref="VectorPath"/> instance, or replace by new path resource and updates.
        /// </summary>
        /// <param name="psdLayer">The psd layer.</param>
        /// <param name="vectorPath">The vector path.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        public static void UpdateLayerFromVectorPath(Layer psdLayer, VectorPath vectorPath, bool createIfNotExist = false)
        {
            ValidateLayer(psdLayer);

            VectorPathDataResource pathResource = FindVectorPathDataResource(psdLayer, createIfNotExist);
            VogkResource vogkResource = FindVogkResource(psdLayer, createIfNotExist);
            SoCoResource socoResource = FindSoCoResource(psdLayer, createIfNotExist);

            Size imageSize = psdLayer.Container.Size;
            UpdateResources(pathResource, vogkResource, socoResource, vectorPath, imageSize);

            ReplaceVectorPathDataResourceInLayer(psdLayer, pathResource, vogkResource, socoResource);
        }

        /// <summary>
        /// Removes the vector path data from input layer.
        /// </summary>
        /// <param name="psdLayer">The psd layer.</param>
        public static void RemoveVectorPathDataFromLayer(Layer psdLayer)
        {
            List<LayerResource> oldResources = new List<LayerResource>(psdLayer.Resources);
            List<LayerResource> newResources = new List<LayerResource>();
            for (int i = 0; i < oldResources.Count; i++)
            {
                LayerResource resource = oldResources[i];

                if (resource is VectorPathDataResource || resource is VogkResource || resource is SoCoResource)
                {
                    continue;
                }
                else
                {
                    newResources.Add(resource);
                }
            }

            psdLayer.Resources = newResources.ToArray();
        }

        /// <summary>
        /// Updates resources data from <see cref="VectorPath"/> instance.
        /// </summary>
        /// <param name="pathResource">The path resource.</param>
        /// <param name="vogkResource">The vector origination data resource.</param>
        /// <param name="socoResource">The solid color resource.</param>
        /// <param name="vectorPath">The vector path.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        private static void UpdateResources(VectorPathDataResource pathResource, VogkResource vogkResource, SoCoResource socoResource, VectorPath vectorPath, Size imageSize)
        {
            pathResource.Version = vectorPath.Version;
            pathResource.IsNotLinked = vectorPath.IsNotLinked;
            pathResource.IsDisabled = vectorPath.IsDisabled;
            pathResource.IsInverted = vectorPath.IsInverted;

            List<VectorShapeOriginSettings> originSettings = new List<VectorShapeOriginSettings>();
            List<VectorPathRecord> path = new List<VectorPathRecord>();
            path.Add(new PathFillRuleRecord(null));
            path.Add(new InitialFillRuleRecord(vectorPath.IsFillStartsWithAllPixels));
            for (ushort i = 0; i < vectorPath.Shapes.Count; i++)
            {
                PathShape shape = vectorPath.Shapes[i];
                shape.ShapeIndex = i;
                path.AddRange(shape.ToVectorPathRecords(imageSize));
                originSettings.Add(new VectorShapeOriginSettings() { IsShapeInvalidated = true, OriginIndex = i });
            }

            pathResource.Paths = path.ToArray();
            vogkResource.ShapeOriginSettings = originSettings.ToArray();

            socoResource.Color = vectorPath.FillColor;
        }

        /// <summary>
        /// Replaces resources in layer by updated or new ones.
        /// </summary>
        /// <param name="psdLayer">The psd layer.</param>
        /// <param name="pathResource">The path resource.</param>
        /// <param name="vogkResource">The vector origination data resource.</param>
        /// <param name="socoResource">The solid color resource.</param>
        private static void ReplaceVectorPathDataResourceInLayer(Layer psdLayer, VectorPathDataResource pathResource, VogkResource vogkResource, SoCoResource socoResource)
        {
            bool pathResourceExist = false;
            bool vogkResourceExist = false;
            bool socoResourceExist = false;

            List<LayerResource> resources = new List<LayerResource>(psdLayer.Resources);
            for (int i = 0; i < resources.Count; i++)
            {
                LayerResource resource = resources[i];
                if (resource is VectorPathDataResource)
                {
                    resources[i] = pathResource;
                    pathResourceExist = true;
                }
                else if (resource is VogkResource)
                {
                    resources[i] = vogkResource;
                    vogkResourceExist = true;
                }
                else if (resource is SoCoResource)
                {
                    resources[i] = socoResource;
                    socoResourceExist = true;
                }
            }

            if (!pathResourceExist)
            {
                resources.Add(pathResource);
            }

            if (!vogkResourceExist)
            {
                resources.Add(vogkResource);
            }

            if (!socoResourceExist)
            {
                resources.Add(socoResource);
            }

            psdLayer.Resources = resources.ToArray();
        }

        /// <summary>
        /// Finds the <see cref="VectorPathDataResource"/> resource in input layer resources.
        /// </summary>
        /// <param name="psdLayer">The psd layer.</param>
        /// <param name="createIfNotExist">If resource not exists, then for <see cref="true"/> creates a new resource, otherwise return <see cref="null"/>.</param>
        /// <returns>The <see cref="VectorPathDataResource"/> resource.</returns>
        private static VectorPathDataResource FindVectorPathDataResource(Layer psdLayer, bool createIfNotExist = false)
        {
            VectorPathDataResource pathResource = null;
            foreach (var resource in psdLayer.Resources)
            {
                if (resource is VectorPathDataResource)
                {
                    pathResource = (VectorPathDataResource)resource;
                    break;
                }
            }

            if (createIfNotExist && pathResource == null)
            {
                pathResource = new VmskResource();
            }

            return pathResource;
        }

        /// <summary>
        /// Finds the <see cref="VogkResource"/> resource in input layer resources.
        /// </summary>
        /// <param name="psdLayer">The psd layer.</param>
        /// <param name="createIfNotExist">If resource not exists, then for <see cref="true"/> creates a new resource, otherwise return <see cref="null"/>.</param>
        /// <returns>The <see cref="VogkResource"/> resource.</returns>
        private static VogkResource FindVogkResource(Layer psdLayer, bool createIfNotExist = false)
        {
            VogkResource vogkResource = null;
            foreach (var resource in psdLayer.Resources)
            {
                if (resource is VogkResource)
                {
                    vogkResource = (VogkResource)resource;
                    break;
                }
            }

            if (createIfNotExist && vogkResource == null)
            {
                vogkResource = new VogkResource();
            }

            return vogkResource;
        }

        /// <summary>
        /// Finds the <see cref="SoCoResource"/> resource in input layer resources.
        /// </summary>
        /// <param name="psdLayer">The psd layer.</param>
        /// <param name="createIfNotExist">If resource not exists, then for <see cref="true"/> creates a new resource, otherwise return <see cref="null"/>.</param>
        /// <returns>The <see cref="SoCoResource"/> resource.</returns>
        private static SoCoResource FindSoCoResource(Layer psdLayer, bool createIfNotExist = false)
        {
            SoCoResource socoResource = null;
            foreach (var resource in psdLayer.Resources)
            {
                if (resource is SoCoResource)
                {
                    socoResource = (SoCoResource)resource;
                    break;
                }
            }

            if (createIfNotExist && socoResource == null)
            {
                socoResource = new SoCoResource();
            }

            return socoResource;
        }

        /// <summary>
        /// Validates the layer to work with <see cref="VectorDataProvider"/> class.
        /// </summary>
        /// <param name="layer"></param>
        /// <exception cref="ArgumentNullException"></exception>
        private static void ValidateLayer(Layer layer)
        {
            if (layer == null)
            {
                throw new ArgumentNullException("The layer is NULL.");
            }

            if (layer.Container == null || layer.Container.Size.IsEmpty)
            {
                throw new ArgumentNullException("The layer should have a Container with no empty size.");
            }
        }
    }

    /// <summary>
    /// The Bezier curve knot, it contains one anchor point and two control points.
    /// </summary>
    public class BezierKnot
    {
        /// <summary>
        /// Image to path point ratio.
        /// </summary>
        private const int ImgToPsdRatio = 256 * 65535;

        /// <summary>
        /// Initializes a new instance of the <see cref="BezierKnot" /> class.
        /// </summary>
        /// <param name="anchorPoint">The anchor point.</param>
        /// <param name="controlPoint1">The first control point.</param>
        /// <param name="controlPoint2">THe second control point.</param>
        /// <param name="isLinked">The value indicating whether this knot is linked.</param>
        public BezierKnot(PointF anchorPoint, PointF controlPoint1, PointF controlPoint2, bool isLinked)
        {
            this.AnchorPoint = anchorPoint;
            this.ControlPoint1 = controlPoint1;
            this.ControlPoint2 = controlPoint2;
            this.IsLinked = isLinked;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="BezierKnot" /> class based on <see cref="BezierKnotRecord"/>.
        /// </summary>
        /// <param name="bezierKnotRecord">The <see cref="BezierKnotRecord"/>.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        public BezierKnot(BezierKnotRecord bezierKnotRecord, Size imageSize)
        {
            this.IsLinked = bezierKnotRecord.IsLinked;
            this.ControlPoint1 = ResourcePointToPointF(bezierKnotRecord.Points[0], imageSize);
            this.AnchorPoint = ResourcePointToPointF(bezierKnotRecord.Points[1], imageSize);
            this.ControlPoint2 = ResourcePointToPointF(bezierKnotRecord.Points[2], imageSize);
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="BezierKnot" /> class.
        /// </summary>
        /// <param name="anchorPoint">The point to be anchor and control points.</param>
        /// <param name="isLinked">The value indicating whether this knot is linked.</param>
        public BezierKnot(PointF anchorPoint, bool isLinked)
        : this(anchorPoint, anchorPoint, anchorPoint, isLinked)
        {
        }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is linked.
        /// </summary>
        public bool IsLinked { get; set; }

        /// <summary>
        /// Gets or sets the first control point.
        /// </summary>
        public PointF ControlPoint1 { get; set; }

        /// <summary>
        /// Gets or sets the anchor point.
        /// </summary>
        public PointF AnchorPoint { get; set; }

        /// <summary>
        /// Gets or sets the second control point.
        /// </summary>
        public PointF ControlPoint2 { get; set; }

        /// <summary>
        /// Creates the instance of <see cref="BezierKnotRecord"/> based on this instance.
        /// </summary>
        /// <param name="isClosed">Indicating whether this knot is in closed shape.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        /// <returns>The instance of <see cref="BezierKnotRecord"/> based on this instance.</returns>
        public BezierKnotRecord ToBezierKnotRecord(bool isClosed, Size imageSize)
        {
            BezierKnotRecord record = new BezierKnotRecord();
            record.Points = new Point[]
            {
                    PointFToResourcePoint(this.ControlPoint1, imageSize),
                    PointFToResourcePoint(this.AnchorPoint, imageSize),
                    PointFToResourcePoint(this.ControlPoint2, imageSize),
            };
            record.IsLinked = this.IsLinked;
            record.IsClosed = isClosed;

            return record;
        }

        /// <summary>
        /// Shifts this knot points by input values.
        /// </summary>
        /// <param name="xOffset">The x offset.</param>
        /// <param name="yOffset">The y offset.</param>
        public void Shift(float xOffset, float yOffset)
        {
            this.ControlPoint1 = new PointF(this.ControlPoint1.X + xOffset, this.ControlPoint1.Y + yOffset);
            this.AnchorPoint = new PointF(this.AnchorPoint.X + xOffset, this.AnchorPoint.Y + yOffset);
            this.ControlPoint2 = new PointF(this.ControlPoint2.X + xOffset, this.ControlPoint2.Y + yOffset);
        }

        /// <summary>
        /// Converts point values from resource to normal.
        /// </summary>
        /// <param name="point">The point with values from resource.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        /// <returns>The converted to normal point.</returns>
        private static PointF ResourcePointToPointF(Point point, Size imageSize)
        {
            return new PointF(point.Y / (ImgToPsdRatio / imageSize.Width), point.X / (ImgToPsdRatio / imageSize.Height));
        }

        /// <summary>
        /// Converts normal point values to resource point.
        /// </summary>
        /// <param name="point">The point.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        /// <returns>The point with values for resource.</returns>
        private static Point PointFToResourcePoint(PointF point, Size imageSize)
        {
            return new Point((int)Math.Round(point.Y * (ImgToPsdRatio / imageSize.Height)), (int)Math.Round(point.X * (ImgToPsdRatio / imageSize.Width)));
        }
    }

    /// <summary>
    /// The figure from the knots of the Bezier curve.
    /// </summary>
    public class PathShape
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="PathShape" /> class.
        /// </summary>
        public PathShape()
        {
            this.Points = new List<BezierKnot>();
            this.PathOperations = PathOperations.CombineShapes;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="PathShape" /> class based on <see cref="VectorPathRecord"/>'s.
        /// </summary>
        /// <param name="lengthRecord">The length record.</param>
        /// <param name="bezierKnotRecords">The bezier knot records.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        public PathShape(LengthRecord lengthRecord, List<BezierKnotRecord> bezierKnotRecords, Size imageSize)
        : this()
        {
            this.IsClosed = lengthRecord.IsClosed;
            this.PathOperations = lengthRecord.PathOperations;
            this.ShapeIndex = lengthRecord.ShapeIndex;
            this.InitFromResources(bezierKnotRecords, imageSize);
        }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is closed.
        /// </summary>
        /// <value>
        ///   <c>true</c> if this instance is closed; otherwise, <c>false</c>.
        /// </value>
        public bool IsClosed { get; set; }

        /// <summary>
        /// Gets or sets the path operations (Boolean operations).
        /// </summary>
        public PathOperations PathOperations { get; set; }

        /// <summary>
        /// Gets or sets the index of current path shape in layer.
        /// </summary>
        public ushort ShapeIndex { get; set; }

        /// <summary>
        /// Gets the points of the Bezier curve.
        /// </summary>
        public List<BezierKnot> Points { get; private set; }

        /// <summary>
        /// Creates the <see cref="VectorPathRecord"/> records based on this instance.
        /// </summary>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        /// <returns>Returns one <see cref="LengthRecord"/> and <see cref="BezierKnotRecord"/> for each point in this instance.</returns>
        public IEnumerable<VectorPathRecord> ToVectorPathRecords(Size imageSize)
        {
            List<VectorPathRecord> shapeRecords = new List<VectorPathRecord>();

            LengthRecord lengthRecord = new LengthRecord();
            lengthRecord.IsClosed = this.IsClosed;
            lengthRecord.BezierKnotRecordsCount = this.Points.Count;
            lengthRecord.PathOperations = this.PathOperations;
            lengthRecord.ShapeIndex = this.ShapeIndex;
            shapeRecords.Add(lengthRecord);

            foreach (var bezierKnot in this.Points)
            {
                shapeRecords.Add(bezierKnot.ToBezierKnotRecord(this.IsClosed, imageSize));
            }

            return shapeRecords;
        }

        /// <summary>
        /// Initializes a values based on input records.
        /// </summary>
        /// <param name="bezierKnotRecords">The bezier knot records.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        private void InitFromResources(IEnumerable<BezierKnotRecord> bezierKnotRecords, Size imageSize)
        {
            List<BezierKnot> newPoints = new List<BezierKnot>();

            foreach (var record in bezierKnotRecords)
            {
                newPoints.Add(new BezierKnot(record, imageSize));
            }

            this.Points = newPoints;
        }
    }

    /// <summary>
    /// The class that contains vector paths.
    /// </summary>
    public class VectorPath
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="VectorPath" /> class based on <see cref="VectorPathDataResource"/>.
        /// </summary>
        /// <param name="vectorPathDataResource">The vector path data resource.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        public VectorPath(VectorPathDataResource vectorPathDataResource, Size imageSize)
        {
            this.InitFromResource(vectorPathDataResource, imageSize);
        }

        /// <summary>
        /// Gets or sets a value indicating whether is fill starts with all pixels.
        /// </summary>
        /// <value>
        /// The is fill starts with all pixels.
        /// </value>
        public bool IsFillStartsWithAllPixels { get; set; }

        /// <summary>
        /// Gets the vector shapes.
        /// </summary>
        public List<PathShape> Shapes { get; private set; }

        /// <summary>
        /// Gets or sets the vector path fill color.
        /// </summary>
        public Color FillColor { get; set; }

        /// <summary>
        /// Gets or sets the version.
        /// </summary>
        /// <value>
        /// The version.
        /// </value>
        public int Version { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is disabled.
        /// </summary>
        /// <value>
        ///   <c>true</c> if this instance is disabled; otherwise, <c>false</c>.
        /// </value>
        public bool IsDisabled { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is not linked.
        /// </summary>
        /// <value>
        ///   <c>true</c> if this instance is not linked; otherwise, <c>false</c>.
        /// </value>
        public bool IsNotLinked { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is inverted.
        /// </summary>
        /// <value>
        ///   <c>true</c> if this instance is inverted; otherwise, <c>false</c>.
        /// </value>
        public bool IsInverted { get; set; }

        /// <summary>
        /// Initializes a values based on input <see cref="VectorPathDataResource"/> resource.
        /// </summary>
        /// <param name="resource">The vector path data resource.</param>
        /// <param name="imageSize">The image size to correct converting point coordinates.</param>
        private void InitFromResource(VectorPathDataResource resource, Size imageSize)
        {
            List<PathShape> newShapes = new List<PathShape>();
            InitialFillRuleRecord initialFillRuleRecord = null;
            LengthRecord lengthRecord = null;
            List<BezierKnotRecord> bezierKnotRecords = new List<BezierKnotRecord>();

            foreach (var pathRecord in resource.Paths)
            {
                if (pathRecord is LengthRecord)
                {
                    if (bezierKnotRecords.Count > 0)
                    {
                        newShapes.Add(new PathShape(lengthRecord, bezierKnotRecords, imageSize));
                        lengthRecord = null;
                        bezierKnotRecords.Clear();
                    }

                    lengthRecord = (LengthRecord)pathRecord;
                }
                else if (pathRecord is BezierKnotRecord)
                {
                    bezierKnotRecords.Add((BezierKnotRecord)pathRecord);
                }
                else if (pathRecord is InitialFillRuleRecord)
                {
                    initialFillRuleRecord = (InitialFillRuleRecord)pathRecord;
                }
            }

            if (bezierKnotRecords.Count > 0)
            {
                newShapes.Add(new PathShape(lengthRecord, bezierKnotRecords, imageSize));
                lengthRecord = null;
                bezierKnotRecords.Clear();
            }

            this.IsFillStartsWithAllPixels = initialFillRuleRecord != null ? initialFillRuleRecord.IsFillStartsWithAllPixels : false;
            this.Shapes = newShapes;

            this.Version = resource.Version;
            this.IsNotLinked = resource.IsNotLinked;
            this.IsDisabled = resource.IsDisabled;
            this.IsInverted = resource.IsInverted;
        }
    }

    #endregion

PSDNET-1002. Incorrect export of vector shape on folder export

            string srcFile = "psdnet1002.psd";
            string outputPng = "output.png";

            using (var image = (PsdImage)Image.Load(srcFile))
            {
                image.Layers[4].Save(outputPng, new PngOptions() { ColorType = PngColorType.TruecolorWithAlpha });
            }