Documents for Imaging .NET Edition
Features / Load Image
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    Load Image
    In This Topic

    GcImaging allows you to load images using Load method of the GcBitmap class. You can load images from file, stream, and byte arrays.

    Purpose Method
    Load image from a file Load (string, System.Drawing.Rectangle?)
    Load image from a stream Load (System.IO.Stream, System.Drawing.Rectangle?)
    Load image from a byte array Load (byte[], System.Drawing.Rectangle?)

    Load Image from File

    To load an image from file, get the image path, store it in a variable and load the file in GcBitmap object using the Load method with the variable as its parameter.

    C#
    Copy Code
    public void LoadSaveFile()
    {
        //Get the image path
        var origImagePath = Path.Combine("Resources", "Images",
                            "color-woman-postits.jpg");
    
        //Initialize GcBitmap
        GcBitmap fileBmp = new GcBitmap();
    
        //Load image from file
        fileBmp.Load(origImagePath);
    
        //Add title to image
        using (var g = fileBmp.CreateGraphics())
        {
            var rc = new RectangleF(512, 0, 100, 100);
    
            var tf = new TextFormat
            {
                Font = Font.FromFile(Path.Combine("Resources", "Fonts",
                                     "times.ttf")),
                FontSize = 40
            };
            g.DrawString("Hello World!", tf, rc, TextAlignment.Center,
                          ParagraphAlignment.Center, false);
        }
    
        //Save image to file
        fileBmp.SaveAsJpeg("color-woman-postits-file.jpg");
    }
    
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    Load Image from Stream

    To load an image from stream, instantiate the FileStream class to read the image in the stream and load the file in GcBitmap object using the Load method with FileStream object as its parameter.

    C#
    Copy Code
    public void LoadSaveStream()
    {
        //Get the image path
        var origImagePath = Path.Combine("Resources", "Images",
                            "color-woman-postits.jpg");
    
        //Initialize GcBitmap
        GcBitmap streamBmp = new GcBitmap();
    
        //Load image from stream
        FileStream stm = new FileStream(origImagePath, FileMode.Open);
        streamBmp.Load(stm);
        stm.Close();
    
        //Add title to image
        using (var g = streamBmp.CreateGraphics())
        {
            var rc = new RectangleF(512, 0, 100, 100);
    
            var tf = new TextFormat
            {
                Font = Font.FromFile(Path.Combine("Resources", "Fonts",
                                     "times.ttf")),
                FontSize = 40
            };
            g.DrawString("Hello World!", tf, rc, TextAlignment.Center,
                    ParagraphAlignment.Center, false);
        }
    
        //Save GcBitmap to stream                       
        MemoryStream outStream = new MemoryStream();
        streamBmp.SaveAsJpeg(outStream);
    }
    
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    Load Image from Byte Array

    To load an image from byte array, you need to read all the bytes of an image using the ReadAllBytes method and load the created byte array in GcBitmap using the Load method.

    C#
    Copy Code
    public void LoadSaveByteArray()
    {
        //Get the image path
        var origImagePath = Path.Combine("Resources", "Images",
                            "color-woman-postits.jpg");
    
        //Initialize GcBitmap
        GcBitmap byteArrayBmp = new GcBitmap();
    
        //Load image from byte array            
        byte[] imgArray = File.ReadAllBytes(origImagePath);
        byteArrayBmp.Load(imgArray);
    
        //Add title to image
        using (var g = byteArrayBmp.CreateGraphics())
        {
            var rc = new RectangleF(512, 0, 100, 100);
    
            var tf = new TextFormat
            {
                Font = Font.FromFile(Path.Combine("Resources", "Fonts",
                                    "times.ttf")),
                FontSize = 40
            };
            g.DrawString("Hello World!", tf, rc, TextAlignment.Center,
                        ParagraphAlignment.Center, false);
        }
    
        //Save image to file
        byteArrayBmp.SaveAsJpeg("color-woman-postits-byteArray.jpg");
    }
    
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