Bitmap PixelFormat Conversion

[Flix]

Is there some way to convert a Bitmap from one PixelFormat (16bit or with
indexed colors) to another(24bit), without doing per pixel operations?

[Bob Powell [MVP]]

You can convert from any format to 32 or 24 bpp easily. However, converting
to an indexed format from either of those requires the use of per-pixel
operations.

Ideally you'd use LockBits to facillitate these operations

See the GDI+ FAQ for details. It demonstrates LockBits and how to convert
from 32bpp into 1bpp.

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

Ramuseco Limited .NET consulting
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"Flix" <wr***@newsgroup.com> wrote in message
news:43*********************@news.tiscali.it...

Is there some way to convert a Bitmap from one PixelFormat (16bit or with
indexed colors) to another(24bit), without doing per pixel operations?

[Christiaan Nijdam]

Hi Flix,

I found this:

private void button3_Click(object sender, System.EventArgs e)
{
Bitmap b1=new Bitmap("augustinus_16ColorBitmap.bmp");

Bitmap b2=new
Bitmap(b1.Size.Width,b1.Size.Height,System.Drawing .Imaging.PixelFormat.Forma
t24bppRgb);
Graphics g = Graphics.FromImage(b2);
g.DrawImage(b1,new Point(0,0));
g.Dispose();

System.Console.WriteLine("b1.PixelFormat="+ b1.PixelFormat.ToString());
System.Console.WriteLine("b2.PixelFormat="+ b2.PixelFormat.ToString());

this.BackgroundImage=b2;
}

Christiaan.

"Flix" <wr***@newsgroup.com> wrote in message
news:43*********************@news.tiscali.it...

Is there some way to convert a Bitmap from one PixelFormat (16bit or with
indexed colors) to another(24bit), without doing per pixel operations?

[Flix]

Thank you !