Class StreamSource
Class StreamSource
Namn på plats: Aspose.Imaging.Sources Församling: Aspose.Imaging.dll (25.4.0)
Det representerar en strömkälla.
[JsonObject(MemberSerialization.OptIn)]
public sealed class StreamSource : SourceInheritance
object ← Source ← StreamSource
Arvsmedlemmar
Source.GetStreamContainer() , object.GetType() , object.ToString() , object.Equals(object?) , object.Equals(object?, object?) , object.ReferenceEquals(object?, object?) , object.GetHashCode()
Examples
Detta exempel visar hur System.IO.Stream används för att skapa en ny bildfil (en 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
}Detta exempel använder Graphics-klassen för att skapa primitiva former på bildytan. För att demonstrera operationen skapar exemplet en ny bild i PNG-format och dra primitiva former på bildytan med hjälp av ritningsmetoder som exponeras av Graphics-klassen.
//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()
Initialiserar en ny instans av Aspose.Imaging.Sources.StreamSource klass.
[JsonConstructor]
public StreamSource()StreamSource(Stream)
Initialiserar en ny instans av Aspose.Imaging.Sources.StreamSource klass.
public StreamSource(Stream stream)Parameters
stream Stream
Strömmen att öppna.
Examples
Detta exempel visar hur du laddar Pixel-information i en Array av Typfärg, manipulerar array och sätter den tillbaka till bilden. För att utföra dessa operationer skapar detta exempel en ny Bildfil (i 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 och bool)
Initialiserar en ny instans av Aspose.Imaging.Sources.StreamSource klass.
public StreamSource(Stream stream, bool disposeStream)Parameters
stream Stream
Strömmen att öppna.
disposeStream bool
Om du ställer in “true” kommer strömmen att raderas.
Examples
Detta exempel visar hur System.IO.Stream används för att skapa en ny bildfil (en 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
Det får ett värde som anger om strömmen ska avlägsnas när behållaren avlägsnas.
public bool DisposeStream { get; }Fastighetsvärde
Stream
får strömmen.
public Stream Stream { get; }Fastighetsvärde
Methods
GetStreamContainer()
Hämta strömkontakten.
public override StreamContainer GetStreamContainer()Returns
och flödet container.
Remarks
Använd med försiktighet. Du kommer att behöva avlägsna strömkontakten efter återvinning.
