RasterImage.SavePixels

RasterImage.SavePixels method

Saves the pixels.

public void SavePixels(Rectangle rectangle, Color[] pixels)

Parameter	Type	Description
rectangle	Rectangle	The rectangle to save pixels to.
pixels	Color[]	The pixels array.

Examples

The following example fills the central area of a raster image with black pixels using the Aspose.Imaging.RasterImage.SavePixels method.

[C#]

string dir = "c:\\temp\\";

using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.png"))
{
    Aspose.Imaging.RasterImage rasterImage = (Aspose.Imaging.RasterImage)image;

    // The black square
    Color[] pixels = new Color[(rasterImage.Width / 2) * (rasterImage.Height / 2)];
    for (int i = 0; i < pixels.Length; i++)
    {
        pixels[i] = Color.Black;
    }

    // Draw the black square at the center of the image.
    Aspose.Imaging.Rectangle area = new Aspose.Imaging.Rectangle(rasterImage.Width / 4, rasterImage.Height / 4, rasterImage.Width / 2, rasterImage.Height / 2);
    rasterImage.SavePixels(area, pixels);

    rasterImage.Save(dir + "sample.SavePixels.png");
}

This example shows how to Loads Pixel information in an Array of Type Color, manipulates the array and set it back to the image. To perform these operations, this example creates a new Image file (in GIF format) uisng MemoryStream object.

[C#]

//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);
    }   
}

RasterImage.SavePixels

RasterImage.SavePixels method

Examples

See Also