I'm looking for the conventer from normal image in C# to AMF3 ByteArray. The image format is JPG, I'm using FluorineFX library to serialize and de-serliazize AMF3 Data.
I need to get image ByteArray in C# from JPG because I'm using this to my flash game, and I don't know how to serialize image to AMF3 ByteArray. There isn't much info on FluorineFX neither AMF3 C# ByteArray.
According to old FluorineFX Documentation if you want to convert image to byte array you need to use byte[] (variable types ending with [] are arrays) or FluorineFx.AMF3.ByteArray.
byte[] Example code:
public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
MemoryStream ms = new MemoryStream();
imageIn.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
return ms.ToArray();
}
public Image byteArrayToImage(byte[] byteArrayIn)
{
MemoryStream ms = new MemoryStream(byteArrayIn);
Image returnImage = Image.FromStream(ms);
return returnImage;
}
Related
I want to upgrade from iTextSharp to iText7.
I cant set the image of PdfButtonField to an System.Drawing.Image in the past.
But now in iText7, the PdfButtonFormField.SetImage(string sImagePah) can only acccept file path.
I create an System.Drawing.Image the fly, How can I set the image the an AcroField in iText7.NET ?
You can use SetValue method and provide Base64-encoded image value there.
Example code to covert System.Drawing.Image to a Base64 string:
public static string ImageToBase64(System.Drawing.Image image)
{
using (MemoryStream ms = new MemoryStream())
{
image.Save(ms, ImageFormat.Png);
byte[] imageBytes = ms.ToArray();
return Convert.ToBase64String(imageBytes);
}
}
Example code to set the image to the form field:
PdfButtonFormField field = ...;
field.SetValue(ImageToBase64(image));
I need to convert a JBIG1 image to another image format, such as JPEG or PNG, but I can't seem to find anything related to this.
This JBIG1 image is received encoded in Base64.
I've tried using System.Drawing in .NET to accomplish this, but a "System.ArgumentException: Parameter is not valid" exception is thrown on calling Image.FromStream() using the JBIG1 byte array data.
See code below:
byte[] binData = ConvertFromBase64StringToArray("BASE64 ENCODED JBIG1 IMAGE GOES HERE");
Image img = binData.ConvertToImage();
img.Save("C:/Images/converted-from-jbig.jpeg", System.Drawing.Imaging.ImageFormat.Jpeg);
Functions used:
public static byte[] ConvertFromBase64StringToArray(string base64String)
{
byte[] data = Convert.FromBase64String(base64String);
using (var stream = new MemoryStream(data, 0, data.Length))
{
data = stream.ToArray();
}
return data;
}
public static Image ConvertToImage(this byte[] byteArrayIn)
{
var ms = new MemoryStream(byteArrayIn);
Image returnImage = Image.FromStream(ms); //exception thrown in this line
return returnImage;
}
Does anyone have any knowledge to share about this topic?
You'll probably need a third party library to work with JBig files. It looks like https://github.com/dlemstra/Magick.NET has support for that.
I have a byte[] of image data (of png type) and I want to convert it into jpeg type image. What would be the best way of doing it in Windows Phone 8?
Try this:
using(var stream = new MemoryStream(bytes))
{
//bytes is byte[] containing the image data
var image = Image.FromStream(stream);
image.Save(File.OpenWrite("MyImage.jpeg", ImageFormat.Jpeg);
}
Is there a way in C# to do this conversion and back?
I have a WPF app which has a Image control. I'm trying to save the image in that control to a SQL Database.
In my Entity Model, the datatype of the picture column in my database is a byte[]. So I found a method to convert a System.Drawing.Image to a byte[] and back. But I haven't found a method to convert from System.Windows.Controls.Image to a byte[].
So that's why I now need to do the above conversion.
If you have a byte array that represents a file that WPF can decode (bmp, jpg, gif, png, tif, ico), you can do the following:
BitmapSource LoadImage(Byte[] imageData)
{
using (MemoryStream ms = new MemoryStream(imageData))
{
var decoder = BitmapDecoder.Create(ms,
BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
return decoder.Frames[0];
}
}
Likewise, to convert it back, you can do the following:
byte[] SaveImage(BitmapSource bitmap)
{
using (MemoryStream ms = new MemoryStream())
{
var encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bitmap));
encoder.Save(ms);
return ms.GetBuffer();
}
}
Well, one is an image and one is a control that shows an image, so I don't think that there's a conversion between the two. But, you could set the Source of the ...Controls.Image to be your ...Drawing.Image.
Edit based on update
Does this do what you need - http://msdn.microsoft.com/en-us/library/ms233764%28VS.100%29.aspx
How can I convert a BITMAP in byte array format to JPEG format using .net 2.0?
What type of byte[] do you mean? The raw file-stream data? In which case, how about something like (using System.Drawing.dll in a client application):
using(Image img = Image.FromFile("foo.bmp"))
{
img.Save("foo.jpg", ImageFormat.Jpeg);
}
Or use FromStream with a new MemoryStream(arr) if you really do have a byte[]:
byte[] raw = ...todo // File.ReadAllBytes("foo.bmp");
using(Image img = Image.FromStream(new MemoryStream(raw)))
{
img.Save("foo.jpg", ImageFormat.Jpeg);
}
If it is just a buffer of raw pixel data, and not a complete image file(including headers etc., such as a JPEG) then you can't use Image.FromStream.
I think what you might be looking for is System.Drawing.Bitmap.LockBits, returning a System.Drawing.Imaging.ImageData; this provides access to reading and writing the image's pixels using a pointer to memory.
public static Bitmap BytesToBitmap(byte[] byteArray)
{
using (MemoryStream ms = new MemoryStream(byteArray))
{
Bitmap img = (Bitmap)Image.FromStream(ms);
return img;
}
}