Real-world testing (pagetest.sh) showed the printer's actual per-page
line/column capacity didn't match what the A4-geometry math predicted,
and the redundant blank second page was traced to the printer
auto-advancing to a new page once content hits the bottom margin,
with our own unconditional trailing form-feed then ejecting that
already-started blank page on top of it.
Replace PRINTER_CPI/PRINTER_LPI with directly-measured
PRINTER_MAX_LINES/PRINTER_MAX_COLS in printer.conf (read via
pagetest.sh), and have txt2printr.sh skip the trailing form-feed
whenever the print job already reaches that line capacity.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Dot-matrix printers have no hardware page-rotation, so when PRINTER_A4
is enabled in the new printer.conf, txt2printr.sh rotates the ascii art
90 degrees in software before sending it, and photobooth.py caps its
live-preview viewfinder to an A4-landscape character grid (sized from
configurable PRINTER_CPI/PRINTER_LPI) instead of just filling the
terminal, so the preview matches what actually gets printed.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Amir Alexander Abdelbaki