76 lines
3.0 KiB
Markdown
76 lines
3.0 KiB
Markdown
# Bleh!
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<p align=center>
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<img src="./bleh.jpg"/>
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</p>
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**Bleh!** is a command-line utility to print images on the MXW01 Bluetooth thermal printer.
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It supports 1-bit (1bpp) and 4-bit (4bpp) printing, various dithering algorithms, PNG preview output, and direct communication with the printer via BLE.
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## Features
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* Print PNG/JPG images (from file or stdin) in 1bpp or 4bpp mode
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* Multiple dithering algorithms (Floyd-Steinberg, Bayer, Atkinson, etc.)
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* Query printer status, battery, version, and more
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* Output a PNG preview instead of printing (for integration or testing)
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* Command-line interface with fine-grained options
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* Works on Linux using BlueZ (via [go-ble/ble](https://github.com/go-ble/ble))
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## Compiling
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On a Linux system, run:
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```sh
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go get bleh
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```
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Then:
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```
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go build
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```
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## Usage
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```sh
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bleh [options] <image_path or ->
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```
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### Options
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| Option | Description |
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| -------------------- | ----------------------------------------------------------------------------------- |
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| `-i`, `--intensity` | Print intensity (0-100) (default: 80) |
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| `-m`, `--mode` | Print mode: 1bpp or 4bpp (default: "1bpp") |
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| `-d`, `--dither` | Dither method: none, floyd, bayer2x2, bayer4x4, bayer8x8, bayer16x16, atkinson, jjn |
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| `-s`, `--status` | Query printer status |
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| `-b`, `--battery` | Query battery level |
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| `-v`, `--version` | Query printer version |
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| `-p`, `--printtype` | Query print type |
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| `-q`, `--querycount` | Query internal counter |
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| `-E`, `--eject` | Eject paper by N lines |
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| `-R`, `--retract` | Retract paper by N lines |
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| `-o`, `--output` | Output PNG preview instead of printing. If value is "-", writes PNG to stdout. |
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| `<image_path or ->` | Path to PNG/JPG image to print, or "-" for stdin |
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### Example
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```sh
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bleh -m 4bpp -d floyd ./myimage.png
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```
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## Requirements
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* Go 1.18+
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* BlueZ on Linux (for BLE support)
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* Dependencies listed in `go.mod` (see source)
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## License
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This project is licensed under the terms of the GNU General Public License v3.0 or later.
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Parts of the code were ported from [CatPrinterBLE](https://github.com/MaikelChan/CatPrinterBLE) and are licensed under the MIT License.
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See the [`LICENSE`](./LICENSE) file for details.
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> **Disclaimer:**
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> While a license was only added after the project’s initial commits, the current license applies retroactively to all previous commits of this repository.
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