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#1 Posted : Friday, September 30, 2005 10:16:18 AM(UTC)
basilisk

Groups: Registered
Posts: 2


I'm using the latest version of your .NET tools.

I have an existing TIFF file and I want to draw some text on it and save it.  How do I do this?

TIA

 

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#2 Posted : Sunday, October 2, 2005 4:10:01 PM(UTC)

Amin  
Amin

Groups: Manager, Tech Support
Posts: 353


After loading the image, you can use the CreateLeadDC method to get a
device context that can be used with Windows GDI methods to draw lines,
text, or images on the image.

You can also use the CreateGdiPlusGraphics method to create a GDI+ Graphics object for drawing.

Both methods have examples in the .NET 14 help file, which you can modify to draw text.

Edited by user Tuesday, December 6, 2016 1:38:27 PM(UTC)  | Reason: Not specified

Amin Dodin

Senior Support Engineer
LEAD Technologies, Inc.
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#3 Posted : Monday, October 3, 2005 6:54:19 AM(UTC)
basilisk

Groups: Registered
Posts: 2


I'm using C#.  Are both of the methods you descibed here available to me in this language?

Using the CreateGdiplusGraphics when processing 1000's of images slows everything down quite a bit.  Is this to be expected?

TIA

 
#4 Posted : Tuesday, October 4, 2005 3:56:29 AM(UTC)

Amin  
Amin

Groups: Manager, Tech Support
Posts: 353


Yes they are both available to C# programmers.

Both CreateLeadDC and CreateGdiPlusGraphics methods are part of the
RasterImage class and each of them has a C# example in the help file.

There could be a performance hit when using these functions with large
image dimensions (width and height). If that is the case, you can work
around it by writing the text on a smaller blank image (e.g. filled with white color), then using the
CombineFastCommand class to move the text to the larger image.

Edited by user Tuesday, December 6, 2016 1:39:06 PM(UTC)  | Reason: Not specified

Amin Dodin

Senior Support Engineer
LEAD Technologies, Inc.
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#5 Posted : Wednesday, July 25, 2007 8:12:30 AM(UTC)
cjcervantes

Groups: Registered
Posts: 2


If you found a way of doing this, could you please post how you did it? If you have some code, it would be very helpful. I'm new on this and I would really appreciate it.

Thanks!
 
#6 Posted : Thursday, July 26, 2007 10:57:12 AM(UTC)

GregR  
GregR

Groups: Registered, Tech Support, Administrators
Posts: 766


The solution is as Amin said.  You must use GDI+ functions to draw the text on the image.  To get a GDI+ Graphics object, you must call the RasterImage.CreateGdiPlusGraphics method.  For an example on converting to and from GDI+ images, see the LEADTOOLS .NET help file regarding the CreateGdiPlusGraphics method.  For code on drawing the text, check MSDN.

 

If you have a Document level or higher toolkit, you can use the LEADTOOLS annotation libraries to add text to the image.  For an example, see the LEADTOOLS .NET help file article regarding non-automated annotations.

 
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