Legacy ImageMagick Discussions Archive

From the command line, is there any possible way to play around with transparencies? I would like to be able to dynamically print text on a gif or png, but have the font actually act like a mask that lets the background show through. So the actual opaque part of the image is the negative space around the text.

Something like this: http://www.rubblewebs.co.uk/imagemagick ... adiant.png

You could setup a form and read the input into a variable; then use the variable in the mask. There may be another way to do it but that seems simple to me.

There is a quite a number of techniques you can use. using the background image as a tiled 'fill color', See...
http://www.imagemagick.org/Usage/text/#size

or a white font on a black background as a greyscale mask
http://www.imagemagick.org/Usage/channels/#masks
http://www.imagemagick.org/Usage/channe ... ed_compose

Thank you Anthony. That was perfect. I can't believe I can do this through the command line!

That shows you the power of IM and why it has gained popularity. people only needed to know what it can do, and IM examples filled that need.