Encoding [][][][] characters

[fdutey]

Hi,

I've been following the watermark tutorial to check how to use the library (need to add some text on top of an image). Tried couple of other examples found here and there as well and with none of them am I able to display a text that is not those squares you get when your encoding is messed up.

I didn't find any place in the doc on how to specify the encoding. Is there any magic trick I missed?

Thanks for your help

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Environment: docker ruby:3.1.2-alpine3.15 + vips APK / Rails 7.0.5.1

[jcupitt]

Hi @fdutey,

It should work, I would guess the fonts are missing, or fc cannot find them.

For example, on this system (ubuntu 23.04) with this program:

#!/usr/bin/ruby

require 'vips'

im = Vips::Image.new_from_file ARGV[0], access: :sequential

text = Vips::Image.text ARGV[2], dpi: 600, rgba: true  
text = text.rotate 45 
text = (text * [1, 1, 1, 0.3]).cast(:uchar)
text = text.embed 100, 100, text.width + 200, text.height + 200
text = text.replicate 1 + im.width / text.width, 1 + im.height / text.height
text = text.crop 0, 0, im.width, im.height

im = im.composite(text, "over") 
im.write_to_file ARGV[1]

I can run:

./watermark.rb ~/pics/nina.jpg x.jpg '<span color="red">Hello</span> <i>world!</i> 😃😂🫠'

To make:

[jcupitt]

To debug fontconfig issues, you can use fc-list to show all current fonts, fc-cache to rebuild the font cache, and run progs with (for example):

FC_DEBUG=1 ./watermark.rb ~/pics/nina.jpg x.jpg '<span color="red">Hello</span> <i>world!</i> 😃😂🫠'

To show a crazy amount of debugging information around font file selection.

[fdutey]

im using an alpine so there was no font installed, problem solved, thank you so much ;)