Printr on an Integral TPV-8370 (80 mm, 576 dots): working great with a small width patch

[rynaco]

Hey hey, thanks for Printr. It's been fantastic so far!

My setup

• Printer: Integral TPV-8370, 80 mm paper, 203 dpi, 576 dots, ESC/POS
• Connection: Ethernet, raw TCP on port 9100 (PRINTR_TCP)
• Host: Raspberry Pi 5, running Printr in Docker next to an existing Compose stack
• Accents print fine with the default PC858 code page

What I ran into
Printr assumes the TM-T88V's 512-dot width, so on a 576-dot printer tickets print about 64 mm wide on 80 mm paper and sit off-center. The reverse-video section headers were also hard to read at size 1.

What I changed (on v1.11.0)

• PRINT_WIDTH set to 576, with a separate DRAW_WIDTH = 512 for drawn blocks (sudoku, maze, weather icon, and so on), so those keep their exact layout
• Images narrower than the paper are centered at print time
• Text at 48 columns (font A) and 64 (font B), plus the matching web preview values
• A new PRINTR_HEADER_SIZE (1 to 3) for section headers. I'm using 2.

Text and headers now use the full width, and the puzzles come out centered.

Suggestion
A paper width setting (say PRINTR_PAPER_DOTS=512|576) would make Printr work on the many generic 80 mm printers out there. I'm happy to share the patch or open a PR if that's useful.

Cheers!

[XNinety9]

Thanks for sharing your setup and for the PR (#42), now merged: PRINTR_PAPER_WIDTH=576 (or Settings → Paper width) will be in 2.1.

[rynaco]

Cheers, thanks @XNinety9, loving Printr and really appreciate all the work you've put into it.