GDI+ Graphics Dump

  • Thread starter Thread starter mark.milley
  • Start date Start date
M

mark.milley

Hi all -

I'm a complete noob when it comes to using the system.drawing
namespace.

I'd like to draw a control to an image instead of on screen (the object
shouldn't appear on screen at all). Any ideas?

I was trying to use control.createGraphics, but it doesn't appear to
have any options to save the data to a different surface...

Is there any way to use the graphics object to draw to multiple
surfaces simultaneously?

Thanks,

-Mark
 
Hi all -

I'm a complete noob when it comes to using the system.drawing
namespace.

I'd like to draw a control to an image instead of on screen (the object
shouldn't appear on screen at all). Any ideas?

I was trying to use control.createGraphics, but it doesn't appear to
have any options to save the data to a different surface...

Is there any way to use the graphics object to draw to multiple
surfaces simultaneously?

Thanks,

-Mark
Click to expand...

"I'd like to draw a control to an image instead of on screen"

What does that mean?
 
"I'd like to draw a control to an image instead of on screen"

What does that mean?
Click to expand...

Instead of drawing it to the form surface (or simultaneously), I'd like
the control to paint itself onto a blank canvas in memory, so I can
save that as an image.

In this case, my end goal is to save a thumbnail of a web page *WITHOUT
SHOWING IT ON SCREEN*. However, this same technique could be used to
save a frame of a video, or anything else, for that matter.

-M
 
Instead of drawing it to the form surface (or simultaneously), I'd like
the control to paint itself onto a blank canvas in memory, so I can
save that as an image.

In this case, my end goal is to save a thumbnail of a web page *WITHOUT
SHOWING IT ON SCREEN*. However, this same technique could be used to
save a frame of a video, or anything else, for that matter.

-M
Click to expand...
Ah, ok...

Do a search on drawing to a bitmap.

http://www.samspublishing.com/articles/article.asp?p=29477&seqNum=8&rl=1

Chris
 
Do a search on drawing to a bitmap.

No, I know how to draw to a bitmap. I'm trying to get (essentially) a
screenshot of a control without that control ever appearing on screen.

I can draw a bitmap.

I can get a screenshot if it's on screen.

What I can't do (yet) is have the control, without drawing itself to
the screen, draw itself to an image instead--(or some other technique
that would have the same result).

I've tried putting the control on an offscreen form and trying to
bitblt that, but it's not working.
 
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