IIRC, the issue is caused by 'toy' Cairo API usage which does not handle hinting settings and scales the label text down. The mentioned commit introduces proper font setup routine. You can check upsteam bug duplicates for direct references.
IIRC, the issue is caused by 'toy' Cairo API usage which does not handle hinting settings and scales the label text down. The mentioned commit introduces proper font setup routine. You can check upsteam bug duplicates for direct references.