Fontlab 5: How to 'Update [kern] feature' in all open fonts?

Ramiro Espinoza

Hi there,

Does anyone know a Python command to 'Update [kern] feature' in all open fonts?

Thanks in advance.

Jameson R Spires

<div>from FL import Feature, fl

# loop through open fonts
for ifont in range(len(fl)):
	font = fl[ifont]

	# generate 'kern' feature value
	kern_feature_value = font.MakeKernFeature().value
	# create 'kern' FontLab feature
	kern_feature = Feature('kern', kern_feature_value)

	# check for 'kern' feature index in current font if it already exists
	kern_feature_i = None
	for i, feature in enumerate(font.features):
		if feature.tag == 'kern':
			kern_feature_i = i
			break

	# delete current 'kern' feature if it exists
	if kern_feature_i:
		del font.features[kern_feature_i]

	# add 'kern' feature to font features
	font.features.append(kern_feature)

	fl.UpdateFont(ifont)<br></div>

This should work.

Malcolm Wooden

If you are updating, saving and closing vfb files you can use this call command but you will need to click OK in the dialog for each font.

for i in range(len(fl)-1,-1,-1):<br>&nbsp;&nbsp;&nbsp; fl.CallCommand(33934)<br>&nbsp;&nbsp;&nbsp; fl.Save(fl.font.file_name)<br>&nbsp;&nbsp;&nbsp; fl.Close(fl.ifont)<br><br>

Else you can do this which is similar to Jameson's above but works backwards through the list of opened fonts as each is saved and closed.

<div>for ifont in range(len(fl)-1,-1,-1):<br>&nbsp;&nbsp;&nbsp; f = fl[ifont]<br>&nbsp;&nbsp;&nbsp; print f.full_name + "\n"<br><br>&nbsp;&nbsp;&nbsp; for i in range(len(f.features)-1,-1,-1):<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; if f.features[i].tag == 'kern':<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; del f.features[i]<br><br>&nbsp;&nbsp;&nbsp; f.features.append(Feature('kern', f.MakeKernFeature().value))<br><br>&nbsp;&nbsp;&nbsp; fl.UpdateFont(ifont)<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; fl.Save(f.file_name)<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; fl.Close(ifont)<br><br></div><br>

Ramiro Espinoza

Thanks!