resizing clipping path

I have a issue with keeping my clipping path in a image, when i resize it.

is this actually posible at all

i figure i shouldt use the GraphicsPath class. and the SetClip method. But can't figure out how to extract and resize the clipping paths from the originale image.

Any suggestions.

It's common use in the Graphical Industries. For instance having a Image of an produkt, you can a clipping path to the image. The image doesn't get clipped, but the path is embedded in the image, for future use. For instance when you want to create a catalog.

And no. I don't know how to get it out and back in. Hence this thread.

The thing i discovered after some testing is :

if i Scale the image by doing this.

Image MyImage = Image.FromFile(inputFile);

BitMap myExportImage = new Bitmap( intNewWidth, intNewHeight);

Graphics myGraph = Graphics.FromImage(myExportImage);

myGraph.DrawImage(MyImage,0,0, intNewWidth, intNewHeight);

myExportImage.Save( outputFileName, System.Drawing.Imaging.ImageFormat.Jpeg);

the image is scaled but the clippingPath is gone.

If i instead do this :

Image MyImage = Image.FromFile(inputFile);

Graphics myGraph = Graphics.FromImage(MyImage);

myGraph.ScaleTransform( intNewWidth,intNewHeight);

MyImage.Save( outputFileName, System.Drawing.Imaging.ImageFormat.Jpeg);

The Image isn't scaled, but the Clipping Path is intact.

Isn't there a way of scaleing an image without using the Bitmap class and the getThumbNail method from the Image-Class

What is the format (file type , extension ) of the inputFile

What happens when you resize the saved Jpeg That is, what happens when you do this:

Tried with your code.. Still no clipping path in the resulting image.

the file Input will be jpeg's and tiff's.

You say that when you save the original file to a JPEG image it has a clipping path I don't understand how that is possible. That's why I asked you to resize that image. Does the original image have a vector clipping path or an embedded Alpha path.

Actually i need both.

But for starters, we need the vector clipping path. For instanced generated with Adobe PhotoShop.

hey Nobugs.

Ok if PhotoShop clipping paths aren't suported in the GDI+. This thread is almost done.

Thanks for the input, and research.

i'll just wait for John and see what he's saying.

I'm surprised that the clipping path was saved in the JPEG that wasn't resized. If this:

doesn't resize and save the clipping path, then you will have to retrieve and save the clipping path programmatically. ImageMagick appears to have good support for clipping paths.