Making a simple transparent rectangle.

[The Transporter]

Hello,

I'm trying to make a simple transparent square using:

Code: Select all

convert -size 200x200 xc:none -fill '#0008' square.png

But if doesn't work.

I've read on the forum that I need to use dstOut but I don't find any example.

Can you provide a simple example who draws a square or a rectangle filled with a color and where we can set a transparency ?

Thanks alot!

[Bonzo]

Not sure what you mean as you want a transparent rectange filled with colour - that is what you created with your code.

Do you want a rectangle that is colored but you can set the opacity ?
Try this using the RGB alpha setting.

Code: Select all

convert -size 200x200 xc:rgba(255, 0, 0, 0.4) square.png

[fmw42]

convert -size 200x200 xc:rgba(255, 0, 0, 0.4) square.png

This might need quotes so that the spaces are not interpretted

convert -size 200x200 xc:"rgba(255, 0, 0, 0.4)" square.png

[anthony]

You did not mention your IM version number.

Some of the recent IM releases had PNG problems
use png32:square.png if the direct to png approach is not working (you get opaque or fully-transparent).
Upgrade if you are not sure.