Hi everyone,
how can i draw a region (polygon or Ellipse) on a bitmap, copy the region i 
markes and paste it on a othe image or picture box?
thanks,
Ruby

"Ruby Nadler"  wrote in message 
news:FFD5F534-0368-49C8-AF84-88872D1BACB8@microsoft.com...

> Hi everyone,
> how can i draw a region (polygon or Ellipse) on a bitmap, copy the region 
> i
> markes and paste it on a othe image or picture box?


Yes. Create a region and use it as the clipping region when you draw one 
bitmap onto the other.


> thanks,
> Ruby 

Can you show me in a small code, I am new to it.
Thanks

"Michael C" wrote:


> "Ruby Nadler"  wrote in message 
> news:FFD5F534-0368-49C8-AF84-88872D1BACB8@microsoft.com...
> > Hi everyone,
> > how can i draw a region (polygon or Ellipse) on a bitmap, copy the region 
> > i
> > markes and paste it on a othe image or picture box?
> 
> Yes. Create a region and use it as the clipping region when you draw one 
> bitmap onto the other.
> 
> > thanks,
> > Ruby 
> 
> 
> 

"Ruby Nadler"  wrote in message 
news:0BB5B967-E83A-4E3D-AFEE-FA6C93F48A9D@microsoft.com...

> Can you show me in a small code, I am new to it.
> Thanks


Something like this:

   GraphicsPath path = new GraphicsPath(MyPoints);//put your array of points 
in here
   Region region = new Region(path);
   Bitmap bitmap1 = Whatever;//source bitmap
   Bitmap bitmap2 = Whatever;//destination bitmap
   Graphics g = Graphics.FromImage(bitmap2);
   g.SetClip(region);
   g.DrawImage(bitmap1);
   g.Dispose();
   region.Dispose();
   path.Dispose();



>>
>> 

thanks alot, you realy helped

"Michael C" wrote:


> "Ruby Nadler"  wrote in message 
> news:0BB5B967-E83A-4E3D-AFEE-FA6C93F48A9D@microsoft.com...
> > Can you show me in a small code, I am new to it.
> > Thanks
> 
> Something like this:
> 
>    GraphicsPath path = new GraphicsPath(MyPoints);//put your array of points 
> in here
>    Region region = new Region(path);
>    Bitmap bitmap1 = Whatever;//source bitmap
>    Bitmap bitmap2 = Whatever;//destination bitmap
>    Graphics g = Graphics.FromImage(bitmap2);
>    g.SetClip(region);
>    g.DrawImage(bitmap1);
>    g.Dispose();
>    region.Dispose();
>    path.Dispose();
> 
> 
> >>
> >> 
> 
> 
> 

Hi Michael,
i am using vb net not c# so i had to change the code. also what i need to do 
is copy a region from picture box to second picture box.
for Ellipse i changed the code to:

Dim recSource As New Rectangle(rectImage.Left, rectImage.Top, 
rectImage.Width, rectImage.Height) ' the ellips Rectangle

Dim bmpImage As New Bitmap(picImage.Width, picImage.Height) ' picImage 
source picturebox
Dim gImage As Graphics = Graphics.FromImage(bmpImage)

Dim gp As New System.Drawing.Drawing2D.GraphicsPath
Dim rgn As Region

gp.AddEllipse(0, 0, rectImage.Width, rectImage.Height)
rgn = New Region(gp)
gImage.SetClip(gp)
gImage.DrawImage(picImage.Image, 0, 0, recSource, GraphicsUnit.Pixel)

PictureBox1.Size = recSource.Size ' target picturebox
PictureBox1.Image = bmpImage

gImage.Dispose()
gp.Dispose()
rgn.Dispose()

in vb net DrawImage can not has only 1 parameter so i gave it the ellips 
Rectangle.

this works fine. when i try polygon it does not work (instesd of 
gp.AddEllipse i use gp.AddPolygon with array of points i collect from the 
mouse).

any idea?
thanks
"Michael C" wrote:


> "Ruby Nadler"  wrote in message 
> news:0BB5B967-E83A-4E3D-AFEE-FA6C93F48A9D@microsoft.com...
> > Can you show me in a small code, I am new to it.
> > Thanks
> 
> Something like this:
> 
>    GraphicsPath path = new GraphicsPath(MyPoints);//put your array of points 
> in here
>    Region region = new Region(path);
>    Bitmap bitmap1 = Whatever;//source bitmap
>    Bitmap bitmap2 = Whatever;//destination bitmap
>    Graphics g = Graphics.FromImage(bitmap2);
>    g.SetClip(region);
>    g.DrawImage(bitmap1);
>    g.Dispose();
>    region.Dispose();
>    path.Dispose();
> 
> 
> >>
> >> 
> 
> 
> 

"Ruby Nadler"  wrote in message 
news:8A1DDCCC-F049-435A-9F01-B4278D004BB1@microsoft.com...

> in vb net DrawImage can not has only 1 parameter so i gave it the ellips
> Rectangle.


Same in C#, the code I posted originally was air code. For the rect you can 
just use the full rect of the image if you like. You might be able to 
optimise this by finding the smallest possible rect that bounds your path 
but it's not critical to do this.

Michael

THANKS, I'LL TRY

"Michael C" wrote:


> "Ruby Nadler"  wrote in message 
> news:8A1DDCCC-F049-435A-9F01-B4278D004BB1@microsoft.com...
> > in vb net DrawImage can not has only 1 parameter so i gave it the ellips
> > Rectangle.
> 
> Same in C#, the code I posted originally was air code. For the rect you can 
> just use the full rect of the image if you like. You might be able to 
> optimise this by finding the smallest possible rect that bounds your path 
> but it's not critical to do this.
> 
> Michael 
> 
> 
> 

"Ruby Nadler"  wrote in message 
news:8A1DDCCC-F049-435A-9F01-B4278D004BB1@microsoft.com...


> in vb net DrawImage can not has only 1 parameter so i gave it the ellips
> Rectangle.


For reference, it has nothing to do with the language. When you're dealing 
with classes and the methods they expose, their parameter lists are the same 
for all .NET languages. The only differences you might see would be between 
built-in statements that just happen to have the same names in different 
languages, and I can't even come up with an example off the top of my head.