Re: [Gimp-user] Export picture

[Liam R E Quin <liam holoweb net>]

On Sun, 2019-09-15 at 00:51 +0000, efornwalt aol com wrote:
> Liam, thank you so much for your response.  I've got a single square
> picture, which I've tried to crop to an oval with feathered edges.  

You can't actually crop an image to anything other than a rectangle -
all the common bitmp image formats (JPEG, PNG, GIF, etc) only support
rectangular images.

The way you make an oval image is to add transparency and make the
"corners" transparent.


> In GIMP the square part is red, the oval picture has a dotted moving
> line.
The dotted moving line is probably an active selection - it's not part
of the image.

>   When I "export as" to use the picture in Print Shop 4, I do get a
> PNG file but the square is black with a white oval where the picture
> should be.  I don't understand what exactly transparency is used for,
> but it wouldn't seem like I need it.
If you want to get an oval picture you need transparency.

So, the steps are,
(1) open the square image
(2) open the Layers dialogue (control-l, that is,lower-case L)
(3) right-click on the backgroudn layer and Add Alpha Channel
(4) use the oval/ellipse tool (you can press "e" to get it) to select
the oval shape.
(5) use select->feather to feather the edges of the oval selection
(6) invert the eslection (select->invert)
now you have the "corners" of the square selected.
(7) cut (control-x)
Now yo ushould see a checker-board in the corners
(8) file->export as PNG
DO NOT USE JPEG as it does not support transparent pixels


Hope this helps.

slave ankh (liam)


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