Class StreamSource

Class StreamSource

Der Name: Aspose.Imaging.Sources Versammlung: Aspose.Imaging.dll (25.4.0)

Es handelt sich um eine Stromquelle.

[JsonObject(MemberSerialization.OptIn)]
public sealed class StreamSource : Source

Inheritance

object Source StreamSource

Vererbte Mitglieder

Source.GetStreamContainer() , object.GetType() , object.ToString() , object.Equals(object?) , object.Equals(object?, object?) , object.ReferenceEquals(object?, object?) , object.GetHashCode()

Examples

Dieses Beispiel zeigt die Verwendung von System.IO.Stream, um eine neue Bilddatei zu erstellen (ein JPEG-Typ)

//Creates an instance of JpegOptions and set its various properties
                                                                                                         Aspose.Imaging.ImageOptions.JpegOptions jpegOptions = new Aspose.Imaging.ImageOptions.JpegOptions();

                                                                                                         //Create an instance of System.IO.Stream
                                                                                                         System.IO.Stream stream = new System.IO.FileStream(@"C:\temp\sample.jpeg", System.IO.FileMode.Create);

                                                                                                         //Define the source property for the instance of JpegOptions
                                                                                                         //Second boolean parameter determins if the Stream is disposed once get out of scope
                                                                                                         jpegOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream, true);

                                                                                                         //Creates an instance of Image and call Create method with JpegOptions as parameter to initialize the Image object   
                                                                                                         using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Create(jpegOptions, 500, 500))
                                                                                                         {
                                                                                                             //do some image processing
                                                                                                         }

Dieses Beispiel verwendet die Graphics-Klasse, um primitive Formen auf der Bildoberfläche zu erstellen.Um die Operation zu demonstrieren, schafft das Beispiel ein neues Bild in PNG-Format und zeichnet primitive Formen auf der Bildoberfläche mit den von Graphics-Klasse ausgesprochenen Zeichnen-Methoden

//Creates an instance of FileStream
                                                                                                                                                                                                                                                                using (System.IO.FileStream stream = new System.IO.FileStream(@"C:\temp\output.png", System.IO.FileMode.Create))
                                                                                                                                                                                                                                                                {
                                                                                                                                                                                                                                                                    //Create an instance of PngOptions and set its various properties
                                                                                                                                                                                                                                                                    Aspose.Imaging.ImageOptions.PngOptions pngOptions = new Aspose.Imaging.ImageOptions.PngOptions();

                                                                                                                                                                                                                                                                    //Set the Source for PngOptions
                                                                                                                                                                                                                                                                    pngOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream);

                                                                                                                                                                                                                                                                    //Create an instance of Image 
                                                                                                                                                                                                                                                                    using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Create(pngOptions, 500, 500))
                                                                                                                                                                                                                                                                    {
                                                                                                                                                                                                                                                                        //Create and initialize an instance of Graphics class
                                                                                                                                                                                                                                                                        Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(image);

                                                                                                                                                                                                                                                                        //Clear Graphics surface
                                                                                                                                                                                                                                                                        graphics.Clear(Aspose.Imaging.Color.Wheat);

                                                                                                                                                                                                                                                                        //Draw an Arc by specifying the Pen object having Black color, 
                                                                                                                                                                                                                                                                        //a Rectangle surrounding the Arc, Start Angle and Sweep Angle
                                                                                                                                                                                                                                                                        graphics.DrawArc(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Black, 2), new Aspose.Imaging.Rectangle(200, 200, 100, 200), 0, 300);

                                                                                                                                                                                                                                                                        //Draw a Bezier by specifying the Pen object having Blue color and co-ordinate Points.
                                                                                                                                                                                                                                                                        graphics.DrawBezier(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Blue, 2), new Aspose.Imaging.Point(250, 100), new Aspose.Imaging.Point(300, 30), new Aspose.Imaging.Point(450, 100), new Aspose.Imaging.Point(235, 25));

                                                                                                                                                                                                                                                                        //Draw a Curve by specifying the Pen object having Green color and an array of Points
                                                                                                                                                                                                                                                                        graphics.DrawCurve(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Green, 2), new[] { new Aspose.Imaging.Point(100, 200), new Aspose.Imaging.Point(100, 350), new Aspose.Imaging.Point(200, 450) });

                                                                                                                                                                                                                                                                        //Draw an Ellipse using the Pen object and a surrounding Rectangle
                                                                                                                                                                                                                                                                        graphics.DrawEllipse(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Yellow, 2), new Aspose.Imaging.Rectangle(300, 300, 100, 100));

                                                                                                                                                                                                                                                                        //Draw a Line 
                                                                                                                                                                                                                                                                        graphics.DrawLine(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Violet, 2), new Aspose.Imaging.Point(100, 100), new Aspose.Imaging.Point(200, 200));

                                                                                                                                                                                                                                                                        //Draw a Pie segment
                                                                                                                                                                                                                                                                        graphics.DrawPie(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Silver, 2), new Aspose.Imaging.Rectangle(new Aspose.Imaging.Point(200, 20), new Aspose.Imaging.Size(200, 200)), 0, 45);

                                                                                                                                                                                                                                                                        //Draw a Polygon by specifying the Pen object having Red color and an array of Points
                                                                                                                                                                                                                                                                        graphics.DrawPolygon(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Red, 2), new[] { new Aspose.Imaging.Point(20, 100), new Aspose.Imaging.Point(20, 200), new Aspose.Imaging.Point(220, 20) });

                                                                                                                                                                                                                                                                        //Draw a Rectangle
                                                                                                                                                                                                                                                                        graphics.DrawRectangle(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Orange, 2), new Aspose.Imaging.Rectangle(new Aspose.Imaging.Point(250, 250), new Aspose.Imaging.Size(100, 100)));

                                                                                                                                                                                                                                                                        //Create a SolidBrush object and set its various properties
                                                                                                                                                                                                                                                                        Aspose.Imaging.Brushes.SolidBrush brush = new Aspose.Imaging.Brushes.SolidBrush();
                                                                                                                                                                                                                                                                        brush.Color = Color.Purple;
                                                                                                                                                                                                                                                                        brush.Opacity = 100;

                                                                                                                                                                                                                                                                        //Draw a String using the SolidBrush object and Font, at specific Point
                                                                                                                                                                                                                                                                        graphics.DrawString("This image is created by Aspose.Imaging API", new Aspose.Imaging.Font("Times New Roman", 16), brush, new Aspose.Imaging.PointF(50, 400));

                                                                                                                                                                                                                                                                        // save all changes.
                                                                                                                                                                                                                                                                        image.Save();
                                                                                                                                                                                                                                                                    }
                                                                                                                                                                                                                                                                }

Constructors

StreamSource()

Initialisiert eine neue Instanz der Aspose.Imaging.Sources.StreamSource Klasse.

[JsonConstructor]
public StreamSource()

StreamSource(Stream)

Initialisiert eine neue Instanz der Aspose.Imaging.Sources.StreamSource Klasse.

public StreamSource(Stream stream)

Parameters

stream Stream

Der Strom zu öffnen.

Examples

Dieses Beispiel zeigt, wie Sie Pixel-Informationen in einer Array von Typfarbe laden, die Array manipulieren und wieder auf das Bild setzen.Um diese Operationen durchzuführen, erstellt dieses Beispiel eine neue Bilddatei (in GIF-Format) uisng MemoryStream Objekt.

//Create an instance of MemoryStream
                                                                                                                                                                                                                                                         using (System.IO.MemoryStream stream = new System.IO.MemoryStream())
                                                                                                                                                                                                                                                         {
                                                                                                                                                                                                                                                             //Create an instance of GifOptions and set its various properties including the Source property
                                                                                                                                                                                                                                                             Aspose.Imaging.ImageOptions.GifOptions gifOptions = new Aspose.Imaging.ImageOptions.GifOptions();
                                                                                                                                                                                                                                                             gifOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream);

                                                                                                                                                                                                                                                             //Create an instance of Image
                                                                                                                                                                                                                                                             using (Aspose.Imaging.RasterImage image = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Create(gifOptions, 500, 500))
                                                                                                                                                                                                                                                             {
                                                                                                                                                                                                                                                                 //Get the pixels of image by specifying the area as image boundary
                                                                                                                                                                                                                                                                 Aspose.Imaging.Color[] pixels = image.LoadPixels(image.Bounds);

                                                                                                                                                                                                                                                                 //Loop over the Array and sets color of alrenative indexed pixel
                                                                                                                                                                                                                                                                 for (int index = 0; index < pixels.Length; index++)
                                                                                                                                                                                                                                                                 {
                                                                                                                                                                                                                                                                     if (index % 2 == 0)
                                                                                                                                                                                                                                                                     {
                                                                                                                                                                                                                                                                         //Set the indexed pixel color to yellow
                                                                                                                                                                                                                                                                         pixels[index] = Aspose.Imaging.Color.Yellow;
                                                                                                                                                                                                                                                                     }
                                                                                                                                                                                                                                                                     else
                                                                                                                                                                                                                                                                     {
                                                                                                                                                                                                                                                                         //Set the indexed pixel color to blue
                                                                                                                                                                                                                                                                         pixels[index] = Aspose.Imaging.Color.Blue;
                                                                                                                                                                                                                                                                     }
                                                                                                                                                                                                                                                                 }

                                                                                                                                                                                                                                                                 //Apply the pixel changes to the image
                                                                                                                                                                                                                                                                 image.SavePixels(image.Bounds, pixels);

                                                                                                                                                                                                                                                                 // save all changes.
                                                                                                                                                                                                                                                                 image.Save();
                                                                                                                                                                                                                                                             }

                                                                                                                                                                                                                                                             // Write MemoryStream to File
                                                                                                                                                                                                                                                             using (System.IO.FileStream fileStream = new System.IO.FileStream(@"C:\temp\output.gif", System.IO.FileMode.Create))
                                                                                                                                                                                                                                                             {
                                                                                                                                                                                                                                                                 stream.WriteTo(fileStream);
                                                                                                                                                                                                                                                             }   
                                                                                                                                                                                                                                                         }

StreamSource(Stream und Bool)

Initialisiert eine neue Instanz der Aspose.Imaging.Sources.StreamSource Klasse.

public StreamSource(Stream stream, bool disposeStream)

Parameters

stream Stream

Der Strom zu öffnen.

disposeStream bool

Wenn Sie auf “richtig” festgelegt sind, wird der Strom abgeschafft.

Examples

Dieses Beispiel zeigt die Verwendung von System.IO.Stream, um eine neue Bilddatei zu erstellen (ein JPEG-Typ)

//Creates an instance of JpegOptions and set its various properties
                                                                                                         Aspose.Imaging.ImageOptions.JpegOptions jpegOptions = new Aspose.Imaging.ImageOptions.JpegOptions();

                                                                                                         //Create an instance of System.IO.Stream
                                                                                                         System.IO.Stream stream = new System.IO.FileStream(@"C:\temp\sample.jpeg", System.IO.FileMode.Create);

                                                                                                         //Define the source property for the instance of JpegOptions
                                                                                                         //Second boolean parameter determins if the Stream is disposed once get out of scope
                                                                                                         jpegOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream, true);

                                                                                                         //Creates an instance of Image and call Create method with JpegOptions as parameter to initialize the Image object   
                                                                                                         using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Create(jpegOptions, 500, 500))
                                                                                                         {
                                                                                                             //do some image processing
                                                                                                         }

Properties

DisposeStream

Er erhält einen Wert, der darauf hindeutet, ob der Strom jedes Mal gelöscht werden sollte, wenn der Container gelöscht wird.

public bool DisposeStream { get; }

Eigentumswert

bool

Stream

Er bekommt den Strom.

public Stream Stream { get; }

Eigentumswert

Stream

Methods

GetStreamContainer()

Geben Sie den Stromcontainer.

public override StreamContainer GetStreamContainer()

Returns

StreamContainer

Der Strom Container.

Remarks

Verwenden Sie mit Vorsicht. Sie müssen den Strombehälter nach der Rücknahme loswerden.

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