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Mike_Lowe  
#1 Posted : Friday, May 27, 2005 6:42:00 PM(UTC)
Mike_Lowe

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Joined: 5/27/2005(UTC)
Posts: 4

Hi,

My client requires huge copyright messages to be dynamically displayed across all images posted on their website. How do I overlay text on an image but allowing the image underneath the text to be still visible (i.e. opacity of the text to be reduced) ? I would appreciate if you could show a quick snippet in C#.

Many thanks,
Mike
Dmitry  
#2 Posted : Friday, May 27, 2005 8:58:00 PM(UTC)
Dmitry

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Joined: 8/3/2003(UTC)
Posts: 1,070

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Hello,

You can insert watermarks on your images using the following code snippet:
Code:
// Input text string, offset of text output and source bitmap.
System.String text = "Aurigma Inc.";
System.Drawing.PointF offset = new System.Drawing.PointF(30.0F, 30.0F);
Aurigma.GraphicsMill.Bitmap bitmap = new Aurigma.GraphicsMill.Bitmap(Aurigma.GraphicsMill.RgbColor.Yellow, 
   200, 200, Aurigma.GraphicsMill.PixelFormat.Format24bppRgb);

// Convert bitmap to rgb color space.
bitmap.ColorManagement.ConvertToContinuous(Aurigma.GraphicsMill.ColorSpace.Rgb, false, false);

// Create font instance.
System.Drawing.Font font = new System.Drawing.Font("Arial", 14);
System.Drawing.Graphics graphics = bitmap.GetGdiplusGraphics();
try
{
	// Create solid brush with opacity.
	System.Drawing.SolidBrush brush = new System.Drawing.SolidBrush(Color.FromArgb(0x9F, 0x00, 0x00, 0x00));

	// Draw text string.
	graphics.DrawString(text, font, brush, offset);
}
finally
{
	font.Dispose();
	graphics.Dispose();
}

// Save result bitmap.
bitmap.Save(@"c:/1.png");

If you have some questions, please fill free to contact me.

Edited by user Sunday, December 23, 2007 6:15:11 PM(UTC)  | Reason: Not specified

Sincerely yours,
Dmitry Sevostyanov

UserPostedImage Follow Aurigma on Twitter!
Mike_Lowe  
#3 Posted : Saturday, May 28, 2005 6:51:00 AM(UTC)
Mike_Lowe

Rank: Member

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Joined: 5/27/2005(UTC)
Posts: 4

Thank you for your suggestion.

Mike
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