Hello,

I have a short array

short[] RawData;

filled with medical image data. Each pixel is represented by a short
value, which must be windowed
by special settings. As I cannot use PixelFormat.Format16bppGrayScale
in GDI+, I tried to use the
PixelFormat.Format16bppRgb555, because I really need to draw into this
image and it would be an advantage to use the Graphics class functions
to draw into it.

The question now is that I want to keep the image data in my rawdata
array and I don't want to copy the data into the bitmap. I really want
to have let's say just a reference and all drawings I perform in the
Graphics canvas should be reflected to the rawdata as well.

Is there a way to do this? I tried following but I don't know if this
will work at all:

public Bitmap AsBitmap
{
get
{
MemoryStream m = new MemoryStream();

Bitmap BMP = new Bitmap(512, 512,
PixelFormat.Format16bppRgb555);
BitmapData Data = BMP.LockBits(new Rectangle(0, 0, 512,
512), ImageLockMode.ReadWrite, PixelFormat.Format16bppRgb555);

unsafe
{
fixed (short* p = &RawData[0])
{
short* ptr = p;

try
{
ptr = (short*)Data.Scan0.ToPointer();
}
catch (Exception E)
{
MessageBox.Show(E.Message);
}
}
}

BMP.UnlockBits(Data);

Graphics g = Graphics.FromImage(BMP);

g.DrawLine(new Pen(Color.White), 0, 0, 100, 100);
return BMP;
}
}


Thanks for your help
Martin

ALL of the 16 bpp formats are damaged and unusable. They were included in
the final cut of GDI+ by mistake.

Sorry.

--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

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"msedi" <msedi (AT) freenet (DOT) de> wrote