Class StreamSource

Class StreamSource

Název místa: Aspose.Imaging.Sources Shromáždění: Aspose.Imaging.dll (25.4.0)

Jedná se o zdroj toku.

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

Inheritance

object Source StreamSource

Dědiční členové

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

Examples

Tento příklad ukazuje používání systému System.IO.Stream k vytvoření nového souboru snímku (typ JPEG)

//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
                                                                                                         }

Tento příklad používá třídu Graphics k vytvoření primitivních tvarů na povrchu obrazu. k demonstraci operace, příklad vytváří nový obrázek ve formátu PNG a kreslí primitivní tvary na povrchu obrazu pomocí metody kreslení vystavených třídou Graphics

//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()

Začíná nový příklad třídy Aspose.Imaging.Sources.StreamSource.

[JsonConstructor]
public StreamSource()

StreamSource(Stream)

Začíná nový příklad třídy Aspose.Imaging.Sources.StreamSource.

public StreamSource(Stream stream)

Parameters

stream Stream

Průtok se otevře.

Examples

Tento příklad ukazuje, jak načítat informace Pixel v Array typu barvy, manipulovat array a nastavit ji zpět na obrázek. k provedení těchto operací, tento příklad vytváří nový soubor obrazu (v formátu GIF) uisng Objekt MemoryStream.

//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(Přívěs, bool)

Začíná nový příklad třídy Aspose.Imaging.Sources.StreamSource.

public StreamSource(Stream stream, bool disposeStream)

Parameters

stream Stream

Průtok se otevře.

disposeStream bool

Pokud je nastaven na “pravdivý”, proud bude vymazán.

Examples

Tento příklad ukazuje používání systému System.IO.Stream k vytvoření nového souboru snímku (typ JPEG)

//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

Obdrží hodnotu, která naznačuje, zda by proud měl být vypuštěn pokaždé, když je kontejner vypuštěn.

public bool DisposeStream { get; }

Hodnota nemovitosti

bool

Stream

Dostane proud.

public Stream Stream { get; }

Hodnota nemovitosti

Stream

Methods

GetStreamContainer()

Dostanete proudový kontejner.

public override StreamContainer GetStreamContainer()

Returns

StreamContainer

Přechodový kontejner.

Remarks

Použijte s opatrností. budete muset rozložit proudový kontejner po převzet.

 Čeština