Graphics -> Bitmap

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David Thielen - 26 Jun 2006 05:34 GMT

Hi;

If I have a Graphics object and want to get a Bitmap object that is what is
drawn in the Graphics object - how do I do that?

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thanks - dave
david_at_windward_dot_net
http://www.windwardreports.com

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"Peter Huang" [MSFT] - 26 Jun 2006 07:59 GMT

Hi

I think we need to create a graphics from the Bitmap, so the following
drawing will be on the Bitmap.
Create from an Image Object
http://msdn2.microsoft.com/en-us/library/5y289054.aspx

If you means an existing graphics, I think you have to P/Invoke the BitBlt
GDI function.
Here is a link for your reference.

Screen Capturing a Form in .NET - Using GDI and GDI+
http://www.c-sharpcorner.com/Graphics/ScreenCaptFormMG.asp

Best regards,

Peter Huang

Microsoft Online Community Support
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David Thielen - 26 Jun 2006 16:59 GMT

That's what I was afraid of - thanks. (I dislike P-Invoke because we're all
supposed to be 100% managed code.)

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thanks - dave
david_at_windward_dot_net
http://www.windwardreports.com

> Hi
>
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> ==================================================
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Ben Voigt - 26 Jun 2006 18:34 GMT

> That's what I was afraid of - thanks. (I dislike P-Invoke because we're
> all
> supposed to be 100% managed code.)

Don't know why you'd need P/Invoke here. Do you know where the Graphics
object came from? If it's from an exposed window onscreen, use the
CopyFromScreen method to get it into a Bitmap. If it's from another Image
(Bitmap/Icon/Metafile, etc) you can use that Image directly or use
DrawImage. If the Graphics object is to an obscured window (another window
overlaps it) or a DirectX surface, then BitBlt isn't going to get you the
data either, because it isn't in any GDI buffer.

>> Hi
>>
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>> This posting is provided "AS IS" with no warranties, and confers no
>> rights.

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David Thielen - 26 Jun 2006 18:41 GMT

It's from a J# (not .NET) Graphics2D object. The only way to get the bitmap
is it will give me a .NET Graphics object.

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thanks - dave
david_at_windward_dot_net
http://www.windwardreports.com

> > That's what I was afraid of - thanks. (I dislike P-Invoke because we're
> > all
[quoted text clipped - 34 lines]
> >> This posting is provided "AS IS" with no warranties, and confers no
> >> rights.

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Graphics -> Bitmap

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