New daemon architecture
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LICENSE
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LICENSE
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Bleh!: Go driver for Cat Thermal Printer MXW01
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Copyright (C) 2025 Ignacio Rivero
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This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
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See LICENSE.gplv3 for details.
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---
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**Portions of this code are adapted from:**
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CatPrinterBLE (C#), Copyright (c) 2025 MaikelChan
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Distributed under the MIT License (see LICENSE.mit for details)
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https://github.com/MaikelChan/CatPrinterBLE
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||||
provisionally, unless and until the copyright holder explicitly and
|
||||
finally terminates your license, and (b) permanently, if the copyright
|
||||
holder fails to notify you of the violation by some reasonable means
|
||||
prior to 60 days after the cessation.
|
||||
|
||||
Moreover, your license from a particular copyright holder is
|
||||
reinstated permanently if the copyright holder notifies you of the
|
||||
violation by some reasonable means, this is the first time you have
|
||||
received notice of violation of this License (for any work) from that
|
||||
copyright holder, and you cure the violation prior to 30 days after
|
||||
your receipt of the notice.
|
||||
|
||||
Termination of your rights under this section does not terminate the
|
||||
licenses of parties who have received copies or rights from you under
|
||||
this License. If your rights have been terminated and not permanently
|
||||
reinstated, you do not qualify to receive new licenses for the same
|
||||
material under section 10.
|
||||
|
||||
9. Acceptance Not Required for Having Copies.
|
||||
|
||||
You are not required to accept this License in order to receive or
|
||||
run a copy of the Program. Ancillary propagation of a covered work
|
||||
occurring solely as a consequence of using peer-to-peer transmission
|
||||
to receive a copy likewise does not require acceptance. However,
|
||||
nothing other than this License grants you permission to propagate or
|
||||
modify any covered work. These actions infringe copyright if you do
|
||||
not accept this License. Therefore, by modifying or propagating a
|
||||
covered work, you indicate your acceptance of this License to do so.
|
||||
|
||||
10. Automatic Licensing of Downstream Recipients.
|
||||
|
||||
Each time you convey a covered work, the recipient automatically
|
||||
receives a license from the original licensors, to run, modify and
|
||||
propagate that work, subject to this License. You are not responsible
|
||||
for enforcing compliance by third parties with this License.
|
||||
|
||||
An "entity transaction" is a transaction transferring control of an
|
||||
organization, or substantially all assets of one, or subdividing an
|
||||
organization, or merging organizations. If propagation of a covered
|
||||
work results from an entity transaction, each party to that
|
||||
transaction who receives a copy of the work also receives whatever
|
||||
licenses to the work the party's predecessor in interest had or could
|
||||
give under the previous paragraph, plus a right to possession of the
|
||||
Corresponding Source of the work from the predecessor in interest, if
|
||||
the predecessor has it or can get it with reasonable efforts.
|
||||
|
||||
You may not impose any further restrictions on the exercise of the
|
||||
rights granted or affirmed under this License. For example, you may
|
||||
not impose a license fee, royalty, or other charge for exercise of
|
||||
rights granted under this License, and you may not initiate litigation
|
||||
(including a cross-claim or counterclaim in a lawsuit) alleging that
|
||||
any patent claim is infringed by making, using, selling, offering for
|
||||
sale, or importing the Program or any portion of it.
|
||||
|
||||
11. Patents.
|
||||
|
||||
A "contributor" is a copyright holder who authorizes use under this
|
||||
License of the Program or a work on which the Program is based. The
|
||||
work thus licensed is called the contributor's "contributor version".
|
||||
|
||||
A contributor's "essential patent claims" are all patent claims
|
||||
owned or controlled by the contributor, whether already acquired or
|
||||
hereafter acquired, that would be infringed by some manner, permitted
|
||||
by this License, of making, using, or selling its contributor version,
|
||||
but do not include claims that would be infringed only as a
|
||||
consequence of further modification of the contributor version. For
|
||||
purposes of this definition, "control" includes the right to grant
|
||||
patent sublicenses in a manner consistent with the requirements of
|
||||
this License.
|
||||
|
||||
Each contributor grants you a non-exclusive, worldwide, royalty-free
|
||||
patent license under the contributor's essential patent claims, to
|
||||
make, use, sell, offer for sale, import and otherwise run, modify and
|
||||
propagate the contents of its contributor version.
|
||||
|
||||
In the following three paragraphs, a "patent license" is any express
|
||||
agreement or commitment, however denominated, not to enforce a patent
|
||||
(such as an express permission to practice a patent or covenant not to
|
||||
sue for patent infringement). To "grant" such a patent license to a
|
||||
party means to make such an agreement or commitment not to enforce a
|
||||
patent against the party.
|
||||
|
||||
If you convey a covered work, knowingly relying on a patent license,
|
||||
and the Corresponding Source of the work is not available for anyone
|
||||
to copy, free of charge and under the terms of this License, through a
|
||||
publicly available network server or other readily accessible means,
|
||||
then you must either (1) cause the Corresponding Source to be so
|
||||
available, or (2) arrange to deprive yourself of the benefit of the
|
||||
patent license for this particular work, or (3) arrange, in a manner
|
||||
consistent with the requirements of this License, to extend the patent
|
||||
license to downstream recipients. "Knowingly relying" means you have
|
||||
actual knowledge that, but for the patent license, your conveying the
|
||||
covered work in a country, or your recipient's use of the covered work
|
||||
in a country, would infringe one or more identifiable patents in that
|
||||
country that you have reason to believe are valid.
|
||||
|
||||
If, pursuant to or in connection with a single transaction or
|
||||
arrangement, you convey, or propagate by procuring conveyance of, a
|
||||
covered work, and grant a patent license to some of the parties
|
||||
receiving the covered work authorizing them to use, propagate, modify
|
||||
or convey a specific copy of the covered work, then the patent license
|
||||
you grant is automatically extended to all recipients of the covered
|
||||
work and works based on it.
|
||||
|
||||
A patent license is "discriminatory" if it does not include within
|
||||
the scope of its coverage, prohibits the exercise of, or is
|
||||
conditioned on the non-exercise of one or more of the rights that are
|
||||
specifically granted under this License. You may not convey a covered
|
||||
work if you are a party to an arrangement with a third party that is
|
||||
in the business of distributing software, under which you make payment
|
||||
to the third party based on the extent of your activity of conveying
|
||||
the work, and under which the third party grants, to any of the
|
||||
parties who would receive the covered work from you, a discriminatory
|
||||
patent license (a) in connection with copies of the covered work
|
||||
conveyed by you (or copies made from those copies), or (b) primarily
|
||||
for and in connection with specific products or compilations that
|
||||
contain the covered work, unless you entered into that arrangement,
|
||||
or that patent license was granted, prior to 28 March 2007.
|
||||
|
||||
Nothing in this License shall be construed as excluding or limiting
|
||||
any implied license or other defenses to infringement that may
|
||||
otherwise be available to you under applicable patent law.
|
||||
|
||||
12. No Surrender of Others' Freedom.
|
||||
|
||||
If conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot convey a
|
||||
covered work so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you may
|
||||
not convey it at all. For example, if you agree to terms that obligate you
|
||||
to collect a royalty for further conveying from those to whom you convey
|
||||
the Program, the only way you could satisfy both those terms and this
|
||||
License would be to refrain entirely from conveying the Program.
|
||||
|
||||
13. Use with the GNU Affero General Public License.
|
||||
|
||||
Notwithstanding any other provision of this License, you have
|
||||
permission to link or combine any covered work with a work licensed
|
||||
under version 3 of the GNU Affero General Public License into a single
|
||||
combined work, and to convey the resulting work. The terms of this
|
||||
License will continue to apply to the part which is the covered work,
|
||||
but the special requirements of the GNU Affero General Public License,
|
||||
section 13, concerning interaction through a network will apply to the
|
||||
combination as such.
|
||||
|
||||
14. Revised Versions of this License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions of
|
||||
the GNU General Public License from time to time. Such new versions will
|
||||
be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Program specifies that a certain numbered version of the GNU General
|
||||
Public License "or any later version" applies to it, you have the
|
||||
option of following the terms and conditions either of that numbered
|
||||
version or of any later version published by the Free Software
|
||||
Foundation. If the Program does not specify a version number of the
|
||||
GNU General Public License, you may choose any version ever published
|
||||
by the Free Software Foundation.
|
||||
|
||||
If the Program specifies that a proxy can decide which future
|
||||
versions of the GNU General Public License can be used, that proxy's
|
||||
public statement of acceptance of a version permanently authorizes you
|
||||
to choose that version for the Program.
|
||||
|
||||
Later license versions may give you additional or different
|
||||
permissions. However, no additional obligations are imposed on any
|
||||
author or copyright holder as a result of your choosing to follow a
|
||||
later version.
|
||||
|
||||
15. Disclaimer of Warranty.
|
||||
|
||||
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
||||
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
||||
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
||||
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
||||
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
||||
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
||||
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. Limitation of Liability.
|
||||
|
||||
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
||||
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
||||
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
||||
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
||||
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
||||
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
||||
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
||||
SUCH DAMAGES.
|
||||
|
||||
17. Interpretation of Sections 15 and 16.
|
||||
|
||||
If the disclaimer of warranty and limitation of liability provided
|
||||
above cannot be given local legal effect according to their terms,
|
||||
reviewing courts shall apply local law that most closely approximates
|
||||
an absolute waiver of all civil liability in connection with the
|
||||
Program, unless a warranty or assumption of liability accompanies a
|
||||
copy of the Program in return for a fee.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Programs
|
||||
|
||||
If you develop a new program, and you want it to be of the greatest
|
||||
possible use to the public, the best way to achieve this is to make it
|
||||
free software which everyone can redistribute and change under these terms.
|
||||
|
||||
To do so, attach the following notices to the program. It is safest
|
||||
to attach them to the start of each source file to most effectively
|
||||
state the exclusion of warranty; and each file should have at least
|
||||
the "copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the program's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
If the program does terminal interaction, make it output a short
|
||||
notice like this when it starts in an interactive mode:
|
||||
|
||||
<program> Copyright (C) <year> <name of author>
|
||||
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||
This is free software, and you are welcome to redistribute it
|
||||
under certain conditions; type `show c' for details.
|
||||
|
||||
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||
parts of the General Public License. Of course, your program's commands
|
||||
might be different; for a GUI interface, you would use an "about box".
|
||||
|
||||
You should also get your employer (if you work as a programmer) or school,
|
||||
if any, to sign a "copyright disclaimer" for the program, if necessary.
|
||||
For more information on this, and how to apply and follow the GNU GPL, see
|
||||
<https://www.gnu.org/licenses/>.
|
||||
|
||||
The GNU General Public License does not permit incorporating your program
|
||||
into proprietary programs. If your program is a subroutine library, you
|
||||
may consider it more useful to permit linking proprietary applications with
|
||||
the library. If this is what you want to do, use the GNU Lesser General
|
||||
Public License instead of this License. But first, please read
|
||||
<https://www.gnu.org/licenses/why-not-lgpl.html>.
|
||||
21
LICENSE.mit
Normal file
21
LICENSE.mit
Normal file
@@ -0,0 +1,21 @@
|
||||
MIT License
|
||||
|
||||
Copyright (c) 2025 MaikelChan
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to deal
|
||||
in the Software without restriction, including without limitation the rights
|
||||
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in all
|
||||
copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
SOFTWARE.
|
||||
104
Makefile
Normal file
104
Makefile
Normal file
@@ -0,0 +1,104 @@
|
||||
PREFIX ?= /usr/local
|
||||
BINDIR ?= $(PREFIX)/bin
|
||||
SYSCONFDIR ?= /etc
|
||||
DESTDIR ?=
|
||||
|
||||
GO ?= go
|
||||
GOFLAGS ?=
|
||||
|
||||
BIN_DIR := bin
|
||||
BLEH := $(BIN_DIR)/bleh
|
||||
BLEHD := $(BIN_DIR)/blehd
|
||||
|
||||
.PHONY: all build clean install uninstall setcap install-systemd uninstall-systemd install-openrc uninstall-openrc
|
||||
|
||||
all: build
|
||||
|
||||
build:
|
||||
@mkdir -p $(BIN_DIR)
|
||||
$(GO) build $(GOFLAGS) -o $(BLEH) ./cmd/bleh
|
||||
$(GO) build $(GOFLAGS) -o $(BLEHD) ./cmd/blehd
|
||||
|
||||
clean:
|
||||
rm -rf $(BIN_DIR)
|
||||
|
||||
# SETCAP:
|
||||
# - auto (default): apply setcap when installing as root and setcap is available
|
||||
# - 1: force setcap (fails if not root / setcap missing)
|
||||
# - 0: never apply setcap
|
||||
SETCAP ?= auto
|
||||
|
||||
install:
|
||||
@test -x $(BLEH) || (echo "Missing $(BLEH). Run: make build"; exit 1)
|
||||
@test -x $(BLEHD) || (echo "Missing $(BLEHD). Run: make build"; exit 1)
|
||||
install -Dm755 $(BLEH) $(DESTDIR)$(BINDIR)/bleh
|
||||
install -Dm755 $(BLEHD) $(DESTDIR)$(BINDIR)/blehd
|
||||
@case "$(SETCAP)" in \
|
||||
auto) \
|
||||
if [ "$$(id -u)" = "0" ] && command -v setcap >/dev/null 2>&1; then \
|
||||
echo "Applying capabilities to blehd (cap_net_raw,cap_net_admin)..."; \
|
||||
setcap cap_net_raw,cap_net_admin=eip $(DESTDIR)$(BINDIR)/blehd; \
|
||||
else \
|
||||
echo "(Skipping setcap: not root or setcap not found; run 'sudo make setcap' if needed)"; \
|
||||
fi \
|
||||
;; \
|
||||
1) \
|
||||
echo "Applying capabilities to blehd (cap_net_raw,cap_net_admin)..."; \
|
||||
setcap cap_net_raw,cap_net_admin=eip $(DESTDIR)$(BINDIR)/blehd \
|
||||
;; \
|
||||
0) \
|
||||
echo "(Skipping setcap: SETCAP=0)" \
|
||||
;; \
|
||||
*) \
|
||||
echo "Unknown SETCAP=$(SETCAP) (use auto|1|0)"; exit 2 \
|
||||
;; \
|
||||
esac
|
||||
@if [ "$$(id -u)" = "0" ]; then \
|
||||
echo "Tip: to install a service: make install-systemd (or install-openrc)"; \
|
||||
fi
|
||||
|
||||
uninstall:
|
||||
rm -f $(DESTDIR)$(BINDIR)/bleh
|
||||
rm -f $(DESTDIR)$(BINDIR)/blehd
|
||||
|
||||
# Give blehd the minimum capabilities it needs so it can run unprivileged.
|
||||
# (Still recommended to run it with a dedicated group for socket access.)
|
||||
setcap: install
|
||||
setcap cap_net_raw,cap_net_admin=eip $(DESTDIR)$(BINDIR)/blehd
|
||||
|
||||
install-systemd:
|
||||
install -Dm644 dist/systemd/blehd-root.service $(DESTDIR)$(SYSCONFDIR)/systemd/system/blehd.service
|
||||
@echo "Installed root unit: $(SYSCONFDIR)/systemd/system/blehd.service"
|
||||
@echo ""
|
||||
@echo "Optional: create 'bleh' group for socket access:"
|
||||
@echo " sudo groupadd -r bleh"
|
||||
@echo " sudo usermod -aG bleh $$USER"
|
||||
@echo " (then re-login)"
|
||||
@echo ""
|
||||
@echo "Now run:"
|
||||
@echo " systemctl daemon-reload"
|
||||
@echo " systemctl enable --now blehd.service"
|
||||
|
||||
uninstall-systemd:
|
||||
systemctl stop blehd.service 2>/dev/null || true
|
||||
systemctl disable blehd.service 2>/dev/null || true
|
||||
rm -f $(DESTDIR)$(SYSCONFDIR)/systemd/system/blehd.service
|
||||
systemctl daemon-reload 2>/dev/null || true
|
||||
@echo "Removed systemd service: $(SYSCONFDIR)/systemd/system/blehd.service"
|
||||
|
||||
install-openrc:
|
||||
install -Dm755 dist/openrc/blehd $(DESTDIR)$(SYSCONFDIR)/init.d/blehd
|
||||
@echo "Installed OpenRC service: $(SYSCONFDIR)/init.d/blehd"
|
||||
@echo ""
|
||||
@echo "Optional: create 'bleh' group for socket access:"
|
||||
@echo " sudo groupadd -r bleh"
|
||||
@echo " sudo usermod -aG bleh $$USER"
|
||||
@echo " (then re-login)"
|
||||
@echo ""
|
||||
@echo "Now run: rc-update add blehd default && rc-service blehd start"
|
||||
|
||||
uninstall-openrc:
|
||||
rc-service blehd stop 2>/dev/null || true
|
||||
rc-update del blehd default 2>/dev/null || true
|
||||
rm -f $(DESTDIR)$(SYSCONFDIR)/init.d/blehd
|
||||
@echo "Removed OpenRC service: $(SYSCONFDIR)/init.d/blehd"
|
||||
96
README.md
Normal file
96
README.md
Normal file
@@ -0,0 +1,96 @@
|
||||
# Bleh!
|
||||
|
||||
<p align=center>
|
||||
<img width=320 src="./demo.jpg"/>
|
||||
</p>
|
||||
|
||||
**Bleh!** is a command-line utility to print images on the MXW01 Bluetooth thermal printer.
|
||||
It supports 1-bit (1bpp) and 4-bit (4bpp) printing, various dithering algorithms, PNG preview output, and direct communication with the printer via BLE.
|
||||
|
||||
## Features
|
||||
|
||||
* Print PNG/JPG images (from file or stdin) in 1bpp or 4bpp mode
|
||||
* Multiple dithering algorithms (Floyd-Steinberg, Bayer, Atkinson, etc.)
|
||||
* Query printer status, battery, version, and more
|
||||
* Output a PNG preview instead of printing (for integration or testing)
|
||||
* Command-line interface with fine-grained options
|
||||
* Works on Linux using BlueZ (via [go-ble/ble](https://github.com/go-ble/ble))
|
||||
|
||||
## Compiling
|
||||
|
||||
On a Linux system:
|
||||
|
||||
```sh
|
||||
make build
|
||||
```
|
||||
|
||||
(or `go build ./...` if you prefer)
|
||||
|
||||
## Running (recommended: root daemon + unprivileged CLI)
|
||||
|
||||
Start the daemon as root:
|
||||
|
||||
```sh
|
||||
sudo ./bin/blehd --socket /run/bleh/blehd.sock --group bleh
|
||||
```
|
||||
|
||||
Then run the CLI as your normal user:
|
||||
|
||||
```sh
|
||||
./bin/bleh -s
|
||||
./bin/bleh -i 100 ./image.png
|
||||
```
|
||||
|
||||
The daemon restricts socket access via the `--group` flag. Add your user to that group:
|
||||
|
||||
```sh
|
||||
sudo groupadd -r bleh
|
||||
sudo usermod -aG bleh $USER
|
||||
# log out and back in
|
||||
```
|
||||
|
||||
For a permanent setup, install the systemd service (see `dist/INSTALL.md`).
|
||||
|
||||
## Usage
|
||||
|
||||
```sh
|
||||
bleh [options] <image_path or ->
|
||||
```
|
||||
|
||||
### Options
|
||||
|
||||
| Option | Description |
|
||||
| -------------------- | ----------------------------------------------------------------------------------- |
|
||||
| `-i`, `--intensity` | Print intensity (0-100) (default: 80) |
|
||||
| `-m`, `--mode` | Print mode: 1bpp or 4bpp (default: "1bpp") |
|
||||
| `-d`, `--dither` | Dither method: none, floyd, bayer2x2, bayer4x4, bayer8x8, bayer16x16, atkinson, jjn |
|
||||
| `-s`, `--status` | Query printer status |
|
||||
| `-b`, `--battery` | Query battery level |
|
||||
| `-v`, `--version` | Query printer version |
|
||||
| `-p`, `--printtype` | Query print type |
|
||||
| `-q`, `--querycount` | Query internal counter |
|
||||
| `-E`, `--eject` | Eject paper by N lines |
|
||||
| `-R`, `--retract` | Retract paper by N lines |
|
||||
| `-o`, `--output` | Output PNG preview instead of printing. If value is "-", writes PNG to stdout. |
|
||||
| `<image_path or ->` | Path to PNG/JPG image to print, or "-" for stdin |
|
||||
|
||||
### Example
|
||||
|
||||
```sh
|
||||
bleh -m 4bpp -d floyd ./myimage.png
|
||||
```
|
||||
|
||||
## Requirements
|
||||
|
||||
* Go 1.18+
|
||||
* BlueZ on Linux (for BLE support)
|
||||
* Dependencies listed in `go.mod` (see source)
|
||||
|
||||
## License
|
||||
|
||||
This project is licensed under the terms of the GNU General Public License v3.0 or later.
|
||||
Parts of the code were ported from [CatPrinterBLE](https://github.com/MaikelChan/CatPrinterBLE) and are licensed under the MIT License.
|
||||
See the [`LICENSE`](./LICENSE) file for details.
|
||||
|
||||
> **Disclaimer:**
|
||||
> While a license was only added after the project’s initial commits, the current license applies retroactively to all previous commits of this repository.
|
||||
346
cmd/bleh/main.go
Normal file
346
cmd/bleh/main.go
Normal file
@@ -0,0 +1,346 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"encoding/base64"
|
||||
"encoding/json"
|
||||
"flag"
|
||||
"fmt"
|
||||
"image"
|
||||
"io"
|
||||
"log"
|
||||
"net"
|
||||
"os"
|
||||
"time"
|
||||
|
||||
"bleh/internal/imageproc"
|
||||
"bleh/internal/ipc"
|
||||
"bleh/internal/mxw01"
|
||||
|
||||
"github.com/disintegration/imaging"
|
||||
)
|
||||
|
||||
const defaultSock = "/run/bleh/blehd.sock"
|
||||
|
||||
var (
|
||||
intensity int
|
||||
mode string
|
||||
ditherType string
|
||||
getStatus bool
|
||||
getBattery bool
|
||||
getVersion bool
|
||||
getPrintType bool
|
||||
getQueryCount bool
|
||||
ejectPaper uint
|
||||
retractPaper uint
|
||||
outputPath string
|
||||
address string
|
||||
socketPath string
|
||||
jsonOutput bool
|
||||
version = "dev"
|
||||
)
|
||||
|
||||
func init() {
|
||||
flag.IntVar(&intensity, "intensity", 80, "Print intensity (0-100)")
|
||||
flag.IntVar(&intensity, "i", 80, "Print intensity (0-100)")
|
||||
|
||||
flag.StringVar(&mode, "mode", "1bpp", "Print mode: 1bpp or 4bpp")
|
||||
flag.StringVar(&mode, "m", "1bpp", "Print mode: 1bpp or 4bpp")
|
||||
|
||||
flag.StringVar(&ditherType, "dither", "none", "Dither method: none, floyd, bayer2x2, bayer4x4, bayer8x8, bayer16x16, atkinson, jjn")
|
||||
flag.StringVar(&ditherType, "d", "none", "Dither method: none, floyd, bayer2x2, bayer4x4, bayer8x8, bayer16x16, atkinson, jjn")
|
||||
|
||||
flag.BoolVar(&getStatus, "status", false, "Query printer status")
|
||||
flag.BoolVar(&getStatus, "s", false, "Query printer status")
|
||||
|
||||
flag.BoolVar(&getBattery, "battery", false, "Query battery level")
|
||||
flag.BoolVar(&getBattery, "b", false, "Query battery level")
|
||||
|
||||
flag.BoolVar(&getVersion, "version", false, "Query printer version")
|
||||
flag.BoolVar(&getVersion, "v", false, "Query printer version")
|
||||
|
||||
flag.BoolVar(&getPrintType, "printtype", false, "Query print type")
|
||||
flag.BoolVar(&getPrintType, "p", false, "Query print type")
|
||||
|
||||
flag.BoolVar(&getQueryCount, "querycount", false, "Query internal counter")
|
||||
flag.BoolVar(&getQueryCount, "q", false, "Query internal counter")
|
||||
|
||||
flag.UintVar(&ejectPaper, "eject", 0, "Eject paper by N lines")
|
||||
flag.UintVar(&ejectPaper, "E", 0, "Eject paper by N lines")
|
||||
|
||||
flag.UintVar(&retractPaper, "retract", 0, "Retract paper by N lines")
|
||||
flag.UintVar(&retractPaper, "R", 0, "Retract paper by N lines")
|
||||
|
||||
flag.StringVar(&outputPath, "o", "", "Output PNG preview instead of printing (specify output path)")
|
||||
flag.StringVar(&outputPath, "output", "", "Output PNG preview instead of printing (specify output path)")
|
||||
|
||||
flag.StringVar(&address, "a", "", "Connect to printer by MAC address")
|
||||
flag.StringVar(&address, "address", "", "Connect to printer by MAC address")
|
||||
|
||||
flag.StringVar(&socketPath, "socket", "", "blehd Unix socket path (default: auto-detect)")
|
||||
flag.BoolVar(&jsonOutput, "json", false, "Output machine-readable JSON")
|
||||
}
|
||||
|
||||
func main() {
|
||||
flag.Parse()
|
||||
|
||||
if outputPath != "-" {
|
||||
log.Println("Bleh! Cat Printer Utility for MXW01, version", version)
|
||||
}
|
||||
|
||||
needNotifications := getStatus || getBattery || getVersion || getPrintType || getQueryCount || ejectPaper > 0 || retractPaper > 0
|
||||
needPrinter := needNotifications || (flag.NArg() > 0 && outputPath == "")
|
||||
|
||||
if !needPrinter && outputPath == "" {
|
||||
log.Println("Nothing to do. Use -h for help.")
|
||||
log.Println("Done!")
|
||||
return
|
||||
}
|
||||
|
||||
// Print mode
|
||||
var printMode mxw01.PrintMode
|
||||
switch mode {
|
||||
case "1bpp":
|
||||
printMode = mxw01.Mode1bpp
|
||||
case "4bpp":
|
||||
printMode = mxw01.Mode4bpp
|
||||
default:
|
||||
log.Fatalf("Invalid mode. Use '1bpp' or '4bpp'.")
|
||||
}
|
||||
|
||||
imagePath := flag.Arg(0)
|
||||
var pixels []byte
|
||||
var height int
|
||||
var err error
|
||||
|
||||
if imagePath != "" {
|
||||
img, err := imageproc.DecodeImage(imagePath)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to load image: %v", err)
|
||||
}
|
||||
img = imageproc.PadImageToMinLines(img, mxw01.MinLines)
|
||||
|
||||
switch printMode {
|
||||
case mxw01.Mode1bpp:
|
||||
pixels, height, err = imageproc.LoadImageMonoFromImage(img, ditherType)
|
||||
case mxw01.Mode4bpp:
|
||||
pixels, height, err = imageproc.LoadImage4BitFromImage(img, ditherType)
|
||||
}
|
||||
if err != nil {
|
||||
log.Fatalf("Image conversion error: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
if outputPath != "" {
|
||||
writePreview(printMode, pixels, height)
|
||||
return
|
||||
}
|
||||
|
||||
c, usedSock, err := dialAuto(socketPath)
|
||||
if err != nil {
|
||||
log.Fatalf("Could not connect to blehd: %v\nStart it with: ./blehd --socket %s", err, defaultSock)
|
||||
}
|
||||
_ = usedSock
|
||||
defer c.Close()
|
||||
|
||||
id := 1
|
||||
call := func(method string, params map[string]any) *ipc.Response {
|
||||
req := ipc.Request{ID: fmt.Sprintf("%d", id), Method: method, Params: params}
|
||||
id++
|
||||
if err := ipc.EncodeLine(c, req); err != nil {
|
||||
log.Fatalf("send failed: %v", err)
|
||||
}
|
||||
resp, err := readResp(c)
|
||||
if err != nil {
|
||||
log.Fatalf("read failed: %v", err)
|
||||
}
|
||||
if !resp.OK {
|
||||
log.Fatalf("%s failed: %s", method, resp.Error.Message)
|
||||
}
|
||||
return resp
|
||||
}
|
||||
|
||||
params := map[string]any{}
|
||||
if address != "" {
|
||||
params["address"] = address
|
||||
}
|
||||
|
||||
if needNotifications {
|
||||
if getStatus {
|
||||
resp := call("printer.status.get", params)
|
||||
printResult("printer.status.get", resp.Result)
|
||||
}
|
||||
if getBattery {
|
||||
resp := call("printer.battery.get", params)
|
||||
printResult("printer.battery.get", resp.Result)
|
||||
}
|
||||
if getVersion {
|
||||
resp := call("printer.version.get", params)
|
||||
printResult("printer.version.get", resp.Result)
|
||||
}
|
||||
if getPrintType {
|
||||
resp := call("printer.printtype.get", params)
|
||||
printResult("printer.printtype.get", resp.Result)
|
||||
}
|
||||
if getQueryCount {
|
||||
resp := call("printer.querycount.get", params)
|
||||
printResult("printer.querycount.get", resp.Result)
|
||||
}
|
||||
if ejectPaper > 0 {
|
||||
p := cloneMap(params)
|
||||
p["lines"] = int(ejectPaper)
|
||||
resp := call("paper.eject", p)
|
||||
printResult("paper.eject", resp.Result)
|
||||
}
|
||||
if retractPaper > 0 {
|
||||
p := cloneMap(params)
|
||||
p["lines"] = int(retractPaper)
|
||||
resp := call("paper.retract", p)
|
||||
printResult("paper.retract", resp.Result)
|
||||
}
|
||||
}
|
||||
|
||||
if flag.NArg() > 0 {
|
||||
i := intensity
|
||||
if i < 0 {
|
||||
i = 0
|
||||
}
|
||||
if i > 100 {
|
||||
i = 100
|
||||
}
|
||||
p := cloneMap(params)
|
||||
p["mode"] = mode
|
||||
p["intensity"] = i
|
||||
p["height"] = height
|
||||
p["pixels_b64"] = base64.StdEncoding.EncodeToString(pixels)
|
||||
resp := call("print.start", p)
|
||||
printResult("print.start", resp.Result)
|
||||
}
|
||||
|
||||
log.Println("Done!")
|
||||
}
|
||||
|
||||
func writePreview(printMode mxw01.PrintMode, pixels []byte, height int) {
|
||||
var previewImg image.Image
|
||||
switch printMode {
|
||||
case mxw01.Mode1bpp:
|
||||
previewImg = imageproc.RenderPreviewFrom1bpp(pixels, mxw01.LinePixels, height)
|
||||
case mxw01.Mode4bpp:
|
||||
previewImg = imageproc.RenderPreviewFrom4bpp(pixels, mxw01.LinePixels, height)
|
||||
}
|
||||
|
||||
var out io.Writer
|
||||
if outputPath == "-" {
|
||||
out = os.Stdout
|
||||
} else {
|
||||
f, err := os.Create(outputPath)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to create output file: %v", err)
|
||||
}
|
||||
defer f.Close()
|
||||
out = bufio.NewWriter(f)
|
||||
defer func() { _ = out.(*bufio.Writer).Flush() }()
|
||||
}
|
||||
|
||||
if err := imaging.Encode(out, previewImg, imaging.PNG); err != nil {
|
||||
log.Fatalf("Failed to write PNG preview: %v", err)
|
||||
}
|
||||
if outputPath != "-" {
|
||||
log.Printf("Preview PNG written to %s\n", outputPath)
|
||||
}
|
||||
}
|
||||
|
||||
func dial(sock string) (net.Conn, error) {
|
||||
return net.DialTimeout("unix", sock, 2*time.Second)
|
||||
}
|
||||
|
||||
func dialAuto(sock string) (net.Conn, string, error) {
|
||||
if sock != "" {
|
||||
c, err := dial(sock)
|
||||
return c, sock, err
|
||||
}
|
||||
|
||||
candidates := []string{}
|
||||
if xdg := os.Getenv("XDG_RUNTIME_DIR"); xdg != "" {
|
||||
candidates = append(candidates, xdg+"/bleh/blehd.sock")
|
||||
}
|
||||
candidates = append(candidates, defaultSock)
|
||||
|
||||
var lastErr error
|
||||
for _, p := range candidates {
|
||||
c, err := dial(p)
|
||||
if err == nil {
|
||||
return c, p, nil
|
||||
}
|
||||
lastErr = err
|
||||
}
|
||||
if lastErr == nil {
|
||||
lastErr = fmt.Errorf("no socket candidates")
|
||||
}
|
||||
return nil, "", lastErr
|
||||
}
|
||||
|
||||
func readResp(c net.Conn) (*ipc.Response, error) {
|
||||
r := bufio.NewReader(c)
|
||||
line, err := ipc.ReadLine(r)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var resp ipc.Response
|
||||
if err := jsonUnmarshal(line, &resp); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &resp, nil
|
||||
}
|
||||
|
||||
func cloneMap(m map[string]any) map[string]any {
|
||||
out := make(map[string]any, len(m)+1)
|
||||
for k, v := range m {
|
||||
out[k] = v
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
func jsonUnmarshal(b []byte, v any) error {
|
||||
// Small helper to avoid importing encoding/json at top-level with name conflicts.
|
||||
return json.Unmarshal(b, v)
|
||||
}
|
||||
|
||||
func jsonPretty(v any) ([]byte, error) {
|
||||
return json.MarshalIndent(v, "", " ")
|
||||
}
|
||||
|
||||
func printResult(method string, result any) {
|
||||
if result == nil {
|
||||
return
|
||||
}
|
||||
if jsonOutput {
|
||||
b, _ := jsonPretty(result)
|
||||
fmt.Println(string(b))
|
||||
return
|
||||
}
|
||||
|
||||
m, _ := result.(map[string]any)
|
||||
switch method {
|
||||
case "printer.status.get":
|
||||
fmt.Printf("Status: %v (%s), Battery: %v, Temp: %v\n",
|
||||
m["ok"], m["state"], m["battery"], m["temp"])
|
||||
case "printer.battery.get":
|
||||
fmt.Printf("Battery level: %v\n", m["battery"])
|
||||
case "printer.version.get":
|
||||
fmt.Printf("Version: %v, Print type: %v\n", m["version"], m["printType"])
|
||||
case "printer.printtype.get":
|
||||
fmt.Printf("Print type: %v\n", m["printType"])
|
||||
case "printer.querycount.get":
|
||||
fmt.Printf("Query count: %v\n", m["queryCount"])
|
||||
case "paper.eject":
|
||||
fmt.Printf("Ejecting paper (%v lines)...\n", m["eject"])
|
||||
case "paper.retract":
|
||||
fmt.Printf("Retracting paper (%v lines)...\n", m["retract"])
|
||||
case "print.start":
|
||||
fmt.Println("Printed.")
|
||||
default:
|
||||
b, _ := jsonPretty(result)
|
||||
fmt.Println(string(b))
|
||||
}
|
||||
}
|
||||
424
cmd/blehd/main.go
Normal file
424
cmd/blehd/main.go
Normal file
@@ -0,0 +1,424 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"context"
|
||||
"encoding/base64"
|
||||
"encoding/json"
|
||||
"errors"
|
||||
"flag"
|
||||
"fmt"
|
||||
"log"
|
||||
"net"
|
||||
"os"
|
||||
"os/signal"
|
||||
"path/filepath"
|
||||
"strconv"
|
||||
"sync"
|
||||
"syscall"
|
||||
"time"
|
||||
|
||||
"bleh/internal/ipc"
|
||||
"bleh/internal/mxw01"
|
||||
|
||||
ble "github.com/go-ble/ble"
|
||||
"github.com/go-ble/ble/linux"
|
||||
"os/user"
|
||||
)
|
||||
|
||||
const (
|
||||
defaultSock = "/run/bleh/blehd.sock"
|
||||
)
|
||||
|
||||
func autoSocketPath(explicit string) (string, error) {
|
||||
if explicit != "" {
|
||||
return explicit, nil
|
||||
}
|
||||
if xdg := os.Getenv("XDG_RUNTIME_DIR"); xdg != "" {
|
||||
return filepath.Join(xdg, "bleh", "blehd.sock"), nil
|
||||
}
|
||||
return defaultSock, nil
|
||||
}
|
||||
|
||||
var printerMu sync.Mutex
|
||||
|
||||
func main() {
|
||||
var socketPath string
|
||||
var groupName string
|
||||
flag.StringVar(&socketPath, "socket", "", "Unix socket path (default: auto-detect)")
|
||||
flag.StringVar(&groupName, "group", "bleh", "Group name to own the socket")
|
||||
flag.Parse()
|
||||
|
||||
resolvedSock, err := autoSocketPath(socketPath)
|
||||
if err != nil {
|
||||
log.Fatalf("Failed to resolve socket path: %v", err)
|
||||
}
|
||||
socketPath = resolvedSock
|
||||
|
||||
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
|
||||
defer stop()
|
||||
|
||||
// Init BLE device once.
|
||||
d, err := linux.NewDevice()
|
||||
if err != nil {
|
||||
log.Printf("Failed to open BLE device: %v", err)
|
||||
log.Printf("Hint: blehd needs CAP_NET_RAW and CAP_NET_ADMIN. Example:")
|
||||
log.Printf(" sudo setcap cap_net_raw,cap_net_admin=eip $(which blehd)")
|
||||
log.Fatalf("Exiting.")
|
||||
}
|
||||
ble.SetDefaultDevice(d)
|
||||
|
||||
if err := os.MkdirAll(filepath.Dir(socketPath), 0o755); err != nil {
|
||||
log.Fatalf("Failed to create socket dir: %v", err)
|
||||
}
|
||||
// Remove stale socket.
|
||||
_ = os.Remove(socketPath)
|
||||
|
||||
ln, err := net.Listen("unix", socketPath)
|
||||
if err != nil {
|
||||
log.Fatalf("Listen failed: %v", err)
|
||||
}
|
||||
defer ln.Close()
|
||||
|
||||
// Set group ownership + perms.
|
||||
if err := setSocketPerms(socketPath, groupName); err != nil {
|
||||
log.Printf("Warning: failed to set socket permissions: %v", err)
|
||||
log.Printf("Hint: if running unprivileged, prefer an XDG runtime socket (set $XDG_RUNTIME_DIR)")
|
||||
}
|
||||
|
||||
log.Printf("blehd listening on %s", socketPath)
|
||||
|
||||
go func() {
|
||||
<-ctx.Done()
|
||||
_ = ln.Close()
|
||||
_ = os.Remove(socketPath)
|
||||
}()
|
||||
|
||||
for {
|
||||
c, err := ln.Accept()
|
||||
if err != nil {
|
||||
if errors.Is(err, net.ErrClosed) || ctx.Err() != nil {
|
||||
return
|
||||
}
|
||||
log.Printf("accept error: %v", err)
|
||||
continue
|
||||
}
|
||||
go handleConn(ctx, c)
|
||||
}
|
||||
}
|
||||
|
||||
func setSocketPerms(path, group string) error {
|
||||
grp, err := user.LookupGroup(group)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
gid, err := strconv.Atoi(grp.Gid)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
// Keep uid unchanged, set gid.
|
||||
if err := os.Chown(path, -1, gid); err != nil {
|
||||
return err
|
||||
}
|
||||
return os.Chmod(path, 0o660)
|
||||
}
|
||||
|
||||
func handleConn(ctx context.Context, c net.Conn) {
|
||||
defer c.Close()
|
||||
r := bufio.NewReader(c)
|
||||
w := bufio.NewWriter(c)
|
||||
defer w.Flush()
|
||||
|
||||
for {
|
||||
line, err := ipc.ReadLine(r)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
req, err := ipc.DecodeRequestLine(line)
|
||||
if err != nil {
|
||||
_ = ipc.EncodeLine(w, ipc.Response{OK: false, Error: &ipc.Error{Code: "EBADJSON", Message: err.Error()}})
|
||||
_ = w.Flush()
|
||||
continue
|
||||
}
|
||||
|
||||
resp := dispatch(ctx, req)
|
||||
_ = ipc.EncodeLine(w, resp)
|
||||
_ = w.Flush()
|
||||
}
|
||||
}
|
||||
|
||||
func dispatch(ctx context.Context, req *ipc.Request) ipc.Response {
|
||||
if req.ID == "" {
|
||||
req.ID = "-"
|
||||
}
|
||||
method := req.Method
|
||||
|
||||
// Serialize access to the printer to avoid concurrent BLE sessions stomping each other.
|
||||
// (This can be relaxed later if the printer/stack supports it reliably.)
|
||||
printerMu.Lock()
|
||||
defer printerMu.Unlock()
|
||||
|
||||
switch method {
|
||||
case "printer.status.get":
|
||||
st, err := doQuery(ctx, req.Params, 0xA1)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
s, err := mxw01.DecodeStatusNotification(st)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, s)
|
||||
|
||||
case "printer.battery.get":
|
||||
b, err := doQuery(ctx, req.Params, 0xAB)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
pct, err := mxw01.DecodeBatteryNotification(b)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, map[string]any{"battery": pct})
|
||||
|
||||
case "printer.version.get":
|
||||
b, err := doQuery(ctx, req.Params, 0xB1)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
v, err := mxw01.DecodeVersionNotification(b)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, v)
|
||||
|
||||
case "printer.printtype.get":
|
||||
b, err := doQuery(ctx, req.Params, 0xB0)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
t, err := mxw01.DecodePrintTypeNotification(b)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, map[string]any{"printType": t})
|
||||
|
||||
case "printer.querycount.get":
|
||||
b, err := doQuery(ctx, req.Params, 0xA7)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
qc, err := mxw01.DecodeQueryCountNotification(b)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, map[string]any{"queryCount": fmt.Sprintf("% X", qc)})
|
||||
|
||||
case "paper.eject":
|
||||
lines, _ := getInt(req.Params, "lines")
|
||||
err := doLineCommand(ctx, req.Params, 0xA3, uint(lines))
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, map[string]any{"eject": lines})
|
||||
|
||||
case "paper.retract":
|
||||
lines, _ := getInt(req.Params, "lines")
|
||||
err := doLineCommand(ctx, req.Params, 0xA4, uint(lines))
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, map[string]any{"retract": lines})
|
||||
|
||||
case "print.start":
|
||||
err := doPrint(ctx, req.Params)
|
||||
if err != nil {
|
||||
return fail(req.ID, err)
|
||||
}
|
||||
return ok(req.ID, map[string]any{"printed": true})
|
||||
|
||||
default:
|
||||
return ipc.Response{ID: req.ID, OK: false, Error: &ipc.Error{Code: "ENOIMPL", Message: "unknown method"}}
|
||||
}
|
||||
}
|
||||
|
||||
func ok(id string, result any) ipc.Response {
|
||||
return ipc.Response{ID: id, OK: true, Result: result}
|
||||
}
|
||||
|
||||
func fail(id string, err error) ipc.Response {
|
||||
return ipc.Response{ID: id, OK: false, Error: &ipc.Error{Code: "EFAIL", Message: err.Error()}}
|
||||
}
|
||||
|
||||
func getString(m map[string]any, key string) (string, bool) {
|
||||
v, ok := m[key]
|
||||
if !ok {
|
||||
return "", false
|
||||
}
|
||||
s, ok := v.(string)
|
||||
return s, ok
|
||||
}
|
||||
|
||||
func getInt(m map[string]any, key string) (int, bool) {
|
||||
v, ok := m[key]
|
||||
if !ok {
|
||||
return 0, false
|
||||
}
|
||||
switch t := v.(type) {
|
||||
case float64:
|
||||
return int(t), true
|
||||
case int:
|
||||
return t, true
|
||||
case json.Number:
|
||||
i, err := t.Int64()
|
||||
return int(i), err == nil
|
||||
default:
|
||||
return 0, false
|
||||
}
|
||||
}
|
||||
|
||||
func doQuery(ctx context.Context, params map[string]any, cmd byte) ([]byte, error) {
|
||||
addr, _ := getString(params, "address")
|
||||
|
||||
cctx, cancel := context.WithTimeout(ctx, 15*time.Second)
|
||||
defer cancel()
|
||||
|
||||
adv, err := mxw01.FindPrinter(cctx, addr)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
client, err := ble.Dial(cctx, adv.Addr())
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer client.CancelConnection()
|
||||
|
||||
mtu, err := client.ExchangeMTU(100)
|
||||
if err == nil {
|
||||
_ = mtu
|
||||
}
|
||||
|
||||
printChr, notifyChr, _, err := mxw01.DiscoverChars(client)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if notifyChr == nil {
|
||||
return nil, fmt.Errorf("missing notification characteristic")
|
||||
}
|
||||
|
||||
notifs := make(chan []byte, 8)
|
||||
_, _ = client.DiscoverDescriptors(nil, notifyChr)
|
||||
err = client.Subscribe(notifyChr, false, func(b []byte) {
|
||||
select {
|
||||
case notifs <- append([]byte{}, b...):
|
||||
default:
|
||||
}
|
||||
})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := mxw01.SendSimpleCommand(client, printChr, cmd); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
deadline := time.NewTimer(2 * time.Second)
|
||||
defer deadline.Stop()
|
||||
for {
|
||||
select {
|
||||
case b := <-notifs:
|
||||
c, _, perr := mxw01.ParseNotification(b)
|
||||
if perr == nil && c == cmd {
|
||||
return b, nil
|
||||
}
|
||||
case <-deadline.C:
|
||||
return nil, fmt.Errorf("timeout waiting for notification 0x%02X", cmd)
|
||||
case <-cctx.Done():
|
||||
return nil, cctx.Err()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func doLineCommand(ctx context.Context, params map[string]any, cmd byte, lines uint) error {
|
||||
addr, _ := getString(params, "address")
|
||||
|
||||
cctx, cancel := context.WithTimeout(ctx, 15*time.Second)
|
||||
defer cancel()
|
||||
|
||||
adv, err := mxw01.FindPrinter(cctx, addr)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
client, err := ble.Dial(cctx, adv.Addr())
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer client.CancelConnection()
|
||||
|
||||
printChr, _, _, err := mxw01.DiscoverChars(client)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return mxw01.SendLineCommand(client, printChr, cmd, lines)
|
||||
}
|
||||
|
||||
func doPrint(ctx context.Context, params map[string]any) error {
|
||||
addr, _ := getString(params, "address")
|
||||
modeStr, _ := getString(params, "mode")
|
||||
intensity, _ := getInt(params, "intensity")
|
||||
height, _ := getInt(params, "height")
|
||||
pixelsB64, _ := getString(params, "pixels_b64")
|
||||
|
||||
if height <= 0 {
|
||||
return fmt.Errorf("invalid height")
|
||||
}
|
||||
pixels, err := base64.StdEncoding.DecodeString(pixelsB64)
|
||||
if err != nil {
|
||||
return fmt.Errorf("decode pixels: %v", err)
|
||||
}
|
||||
|
||||
pm := mxw01.Mode1bpp
|
||||
switch modeStr {
|
||||
case "1bpp":
|
||||
pm = mxw01.Mode1bpp
|
||||
case "4bpp":
|
||||
pm = mxw01.Mode4bpp
|
||||
default:
|
||||
return fmt.Errorf("invalid mode")
|
||||
}
|
||||
if intensity < 0 {
|
||||
intensity = 0
|
||||
}
|
||||
if intensity > 100 {
|
||||
intensity = 100
|
||||
}
|
||||
|
||||
cctx, cancel := context.WithTimeout(ctx, 60*time.Second)
|
||||
defer cancel()
|
||||
|
||||
adv, err := mxw01.FindPrinter(cctx, addr)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
client, err := ble.Dial(cctx, adv.Addr())
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer client.CancelConnection()
|
||||
|
||||
mtu, err := client.ExchangeMTU(100)
|
||||
if err != nil {
|
||||
mtu = 23
|
||||
}
|
||||
|
||||
printChr, _, dataChr, err := mxw01.DiscoverChars(client)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if printChr == nil || dataChr == nil {
|
||||
return fmt.Errorf("missing required characteristics")
|
||||
}
|
||||
|
||||
return mxw01.SendImageBufferToPrinter(client, dataChr, printChr, pixels, height, pm, byte(intensity), mtu)
|
||||
}
|
||||
85
dist/INSTALL.md
vendored
Normal file
85
dist/INSTALL.md
vendored
Normal file
@@ -0,0 +1,85 @@
|
||||
# bleh / blehd install notes
|
||||
|
||||
## Recommended model
|
||||
|
||||
- `bleh` is unprivileged.
|
||||
- `blehd` runs as **root** (recommended). It owns the BLE device, and exposes a Unix socket for `bleh` to use.
|
||||
- Access to that socket can be restricted with `--group` (recommended).
|
||||
|
||||
## Build
|
||||
|
||||
```sh
|
||||
make build
|
||||
```
|
||||
|
||||
## Install (system)
|
||||
|
||||
```sh
|
||||
sudo make install PREFIX=/usr/local
|
||||
```
|
||||
|
||||
By default (`SETCAP=auto`), `make install` will apply capabilities to `blehd` when run as root.
|
||||
|
||||
If you plan to run `blehd` as a **root system service** (recommended), you can skip capabilities:
|
||||
|
||||
```sh
|
||||
sudo make install SETCAP=0
|
||||
```
|
||||
|
||||
## Group access (optional)
|
||||
|
||||
If you want group-based access to the socket:
|
||||
|
||||
```sh
|
||||
sudo groupadd -r bleh || true
|
||||
sudo usermod -aG bleh $USER
|
||||
# then re-login
|
||||
```
|
||||
|
||||
Then run blehd with `--group bleh`.
|
||||
|
||||
## systemd service (recommended)
|
||||
|
||||
Install the unit:
|
||||
|
||||
```sh
|
||||
sudo make install-systemd
|
||||
```
|
||||
|
||||
Enable it:
|
||||
|
||||
```sh
|
||||
sudo systemctl daemon-reload
|
||||
sudo systemctl enable --now blehd.service
|
||||
```
|
||||
|
||||
This will run `blehd` as root, listening on:
|
||||
|
||||
- `/run/bleh/blehd.sock`
|
||||
|
||||
To uninstall:
|
||||
|
||||
```sh
|
||||
sudo make uninstall-systemd
|
||||
```
|
||||
|
||||
## OpenRC service
|
||||
|
||||
Install the init script:
|
||||
|
||||
```sh
|
||||
sudo make install-openrc
|
||||
```
|
||||
|
||||
Enable it:
|
||||
|
||||
```sh
|
||||
sudo rc-update add blehd default
|
||||
sudo rc-service blehd start
|
||||
```
|
||||
|
||||
To uninstall:
|
||||
|
||||
```sh
|
||||
sudo make uninstall-openrc
|
||||
```
|
||||
17
dist/openrc/blehd
vendored
Normal file
17
dist/openrc/blehd
vendored
Normal file
@@ -0,0 +1,17 @@
|
||||
#!/sbin/openrc-run
|
||||
|
||||
name="blehd"
|
||||
description="Bleh MXW01 privileged helper daemon"
|
||||
|
||||
command="/usr/local/bin/blehd"
|
||||
command_args="--socket /run/bleh/blehd.sock --group bleh"
|
||||
command_background=true
|
||||
pidfile="/run/${name}.pid"
|
||||
|
||||
start_pre() {
|
||||
checkpath -d -m 0755 /run/bleh
|
||||
}
|
||||
|
||||
depend() {
|
||||
after bluetooth
|
||||
}
|
||||
27
dist/systemd/blehd-root.service
vendored
Normal file
27
dist/systemd/blehd-root.service
vendored
Normal file
@@ -0,0 +1,27 @@
|
||||
[Unit]
|
||||
Description=Bleh MXW01 helper daemon (root)
|
||||
After=network.target
|
||||
|
||||
[Service]
|
||||
Type=simple
|
||||
ExecStart=/usr/local/bin/blehd --socket /run/bleh/blehd.sock --group bleh
|
||||
Restart=on-failure
|
||||
RestartSec=1
|
||||
|
||||
RuntimeDirectory=bleh
|
||||
RuntimeDirectoryMode=0755
|
||||
|
||||
# Hardening (still useful even as root)
|
||||
NoNewPrivileges=true
|
||||
PrivateTmp=true
|
||||
ProtectSystem=strict
|
||||
ProtectHome=true
|
||||
ProtectKernelTunables=true
|
||||
ProtectKernelModules=true
|
||||
ProtectControlGroups=true
|
||||
RestrictSUIDSGID=true
|
||||
LockPersonality=true
|
||||
MemoryDenyWriteExecute=true
|
||||
|
||||
[Install]
|
||||
WantedBy=multi-user.target
|
||||
19
go.mod
Normal file
19
go.mod
Normal file
@@ -0,0 +1,19 @@
|
||||
module bleh
|
||||
|
||||
go 1.22
|
||||
|
||||
require (
|
||||
github.com/disintegration/imaging v1.6.2
|
||||
github.com/go-ble/ble v0.0.0-20240122180141-8c5522f54333
|
||||
github.com/makeworld-the-better-one/dither v1.0.0
|
||||
)
|
||||
|
||||
require (
|
||||
github.com/mattn/go-colorable v0.1.6 // indirect
|
||||
github.com/mattn/go-isatty v0.0.12 // indirect
|
||||
github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect
|
||||
github.com/mgutz/logxi v0.0.0-20161027140823-aebf8a7d67ab // indirect
|
||||
github.com/pkg/errors v0.8.1 // indirect
|
||||
golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 // indirect
|
||||
golang.org/x/sys v0.0.0-20211204120058-94396e421777 // indirect
|
||||
)
|
||||
189
internal/imageproc/imageproc.go
Normal file
189
internal/imageproc/imageproc.go
Normal file
@@ -0,0 +1,189 @@
|
||||
package imageproc
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"image"
|
||||
"image/color"
|
||||
_ "image/gif"
|
||||
_ "image/jpeg"
|
||||
_ "image/png"
|
||||
"io"
|
||||
"os"
|
||||
|
||||
"github.com/disintegration/imaging"
|
||||
dither "github.com/makeworld-the-better-one/dither"
|
||||
|
||||
"bleh/internal/mxw01"
|
||||
)
|
||||
|
||||
// DecodeImage loads an image from a given path or stdin ("-").
|
||||
func DecodeImage(path string) (image.Image, error) {
|
||||
if path == "-" {
|
||||
return DecodeImageFromReader(os.Stdin)
|
||||
}
|
||||
img, err := imaging.Open(path, imaging.AutoOrientation(true))
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to open image %q: %v", path, err)
|
||||
}
|
||||
return img, nil
|
||||
}
|
||||
|
||||
func DecodeImageFromReader(r io.Reader) (image.Image, error) {
|
||||
img, _, err := image.Decode(r)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("decode error: %v", err)
|
||||
}
|
||||
return img, nil
|
||||
}
|
||||
|
||||
func PadImageToMinLines(img image.Image, minLines int) image.Image {
|
||||
bounds := img.Bounds()
|
||||
if bounds.Dy() >= minLines {
|
||||
return img
|
||||
}
|
||||
dst := imaging.New(bounds.Dx(), minLines, color.White)
|
||||
dst = imaging.Paste(dst, img, image.Pt(0, 0))
|
||||
return dst
|
||||
}
|
||||
|
||||
func LoadImageMonoFromImage(img image.Image, ditherType string) ([]byte, int, error) {
|
||||
b := img.Bounds()
|
||||
if b.Dx() <= 0 || b.Dy() <= 0 {
|
||||
return nil, 0, fmt.Errorf("invalid image bounds: %v", b)
|
||||
}
|
||||
ratio := float64(b.Dx()) / float64(b.Dy())
|
||||
height := int(float64(mxw01.LinePixels) / ratio)
|
||||
if height <= 0 {
|
||||
return nil, 0, fmt.Errorf("computed invalid height: %d", height)
|
||||
}
|
||||
|
||||
img = imaging.Resize(img, mxw01.LinePixels, height, imaging.Lanczos)
|
||||
img = imaging.Grayscale(img)
|
||||
|
||||
if ditherType != "none" {
|
||||
palette := []color.Color{color.Black, color.White}
|
||||
d := dither.NewDitherer(palette)
|
||||
switch ditherType {
|
||||
case "floyd":
|
||||
d.Matrix = dither.FloydSteinberg
|
||||
case "bayer2x2":
|
||||
d.Mapper = dither.Bayer(2, 2, 1.0)
|
||||
case "bayer4x4":
|
||||
d.Mapper = dither.Bayer(4, 4, 1.0)
|
||||
case "bayer8x8":
|
||||
d.Mapper = dither.Bayer(8, 8, 1.0)
|
||||
case "bayer16x16":
|
||||
d.Mapper = dither.Bayer(16, 16, 1.0)
|
||||
case "atkinson":
|
||||
d.Matrix = dither.Atkinson
|
||||
case "jjn":
|
||||
d.Matrix = dither.JarvisJudiceNinke
|
||||
default:
|
||||
return nil, 0, fmt.Errorf("unknown dither type: %s", ditherType)
|
||||
}
|
||||
img = d.DitherCopy(img)
|
||||
} else {
|
||||
img = imaging.AdjustContrast(img, 10)
|
||||
}
|
||||
|
||||
pixels := make([]byte, (mxw01.LinePixels*height)/8)
|
||||
for y := 0; y < height; y++ {
|
||||
for x := 0; x < mxw01.LinePixels; x++ {
|
||||
gray := color.GrayModel.Convert(img.At(x, y)).(color.Gray)
|
||||
if gray.Y < 128 {
|
||||
idx := (y*mxw01.LinePixels + x) / 8
|
||||
pixels[idx] |= 1 << (x % 8)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return pixels, height, nil
|
||||
}
|
||||
|
||||
func LoadImage4BitFromImage(img image.Image, ditherType string) ([]byte, int, error) {
|
||||
b := img.Bounds()
|
||||
if b.Dx() <= 0 || b.Dy() <= 0 {
|
||||
return nil, 0, fmt.Errorf("invalid image bounds: %v", b)
|
||||
}
|
||||
ratio := float64(b.Dx()) / float64(b.Dy())
|
||||
height := int(float64(mxw01.LinePixels) / ratio)
|
||||
if height <= 0 {
|
||||
return nil, 0, fmt.Errorf("computed invalid height: %d", height)
|
||||
}
|
||||
|
||||
img = imaging.Resize(img, mxw01.LinePixels, height, imaging.Lanczos)
|
||||
img = imaging.Grayscale(img)
|
||||
|
||||
palette := make([]color.Color, 16)
|
||||
for i := 0; i < 16; i++ {
|
||||
v := uint8(i * 17)
|
||||
palette[i] = color.Gray{Y: 255 - v}
|
||||
}
|
||||
|
||||
if ditherType != "none" {
|
||||
d := dither.NewDitherer(palette)
|
||||
switch ditherType {
|
||||
case "floyd":
|
||||
d.Matrix = dither.FloydSteinberg
|
||||
case "bayer2x2":
|
||||
d.Mapper = dither.Bayer(2, 2, 0.2)
|
||||
case "bayer4x4":
|
||||
d.Mapper = dither.Bayer(4, 4, 0.2)
|
||||
case "bayer8x8":
|
||||
d.Mapper = dither.Bayer(8, 8, 0.2)
|
||||
case "bayer16x16":
|
||||
d.Mapper = dither.Bayer(16, 16, 0.2)
|
||||
case "atkinson":
|
||||
d.Matrix = dither.Atkinson
|
||||
case "jjn":
|
||||
d.Matrix = dither.JarvisJudiceNinke
|
||||
default:
|
||||
return nil, 0, fmt.Errorf("unknown dither type: %s", ditherType)
|
||||
}
|
||||
img = d.DitherCopy(img)
|
||||
}
|
||||
|
||||
width := mxw01.LinePixels
|
||||
pixels := make([]byte, (width*height)/2)
|
||||
for y := 0; y < height; y++ {
|
||||
for x := 0; x < width; x++ {
|
||||
gray := color.GrayModel.Convert(img.At(x, y)).(color.Gray)
|
||||
level := (255 - gray.Y) >> 4
|
||||
idx := (y*width + x) >> 1
|
||||
shift := uint(((x & 1) ^ 1) << 2)
|
||||
pixels[idx] |= byte(level) << shift
|
||||
}
|
||||
}
|
||||
|
||||
return pixels, height, nil
|
||||
}
|
||||
|
||||
func RenderPreviewFrom1bpp(pixels []byte, width, height int) image.Image {
|
||||
img := image.NewGray(image.Rect(0, 0, width, height))
|
||||
for y := 0; y < height; y++ {
|
||||
for x := 0; x < width; x++ {
|
||||
idx := (y*width + x) / 8
|
||||
bit := uint(x % 8)
|
||||
if pixels[idx]&(1<<bit) != 0 {
|
||||
img.SetGray(x, y, color.Gray{Y: 0})
|
||||
} else {
|
||||
img.SetGray(x, y, color.Gray{Y: 255})
|
||||
}
|
||||
}
|
||||
}
|
||||
return img
|
||||
}
|
||||
|
||||
func RenderPreviewFrom4bpp(pixels []byte, width, height int) image.Image {
|
||||
img := image.NewGray(image.Rect(0, 0, width, height))
|
||||
for y := 0; y < height; y++ {
|
||||
for x := 0; x < width; x++ {
|
||||
idx := (y*width + x) >> 1
|
||||
shift := uint(((x & 1) ^ 1) << 2)
|
||||
val := (pixels[idx] >> shift) & 0x0F
|
||||
gray := 255 - val*17
|
||||
img.SetGray(x, y, color.Gray{Y: gray})
|
||||
}
|
||||
}
|
||||
return img
|
||||
}
|
||||
55
internal/ipc/jsonl.go
Normal file
55
internal/ipc/jsonl.go
Normal file
@@ -0,0 +1,55 @@
|
||||
package ipc
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"bytes"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
)
|
||||
|
||||
const (
|
||||
// MaxLineBytes is the maximum size of a single JSON line accepted by the JSONL protocol.
|
||||
// 1 MiB is enough for fairly large base64 pixel payloads while keeping memory bounded.
|
||||
MaxLineBytes = 1 << 20
|
||||
)
|
||||
|
||||
// ReadLine reads a single '\n'-terminated line from r with a hard size limit.
|
||||
func ReadLine(r *bufio.Reader) ([]byte, error) {
|
||||
var buf bytes.Buffer
|
||||
for {
|
||||
chunk, isPrefix, err := r.ReadLine()
|
||||
if err != nil {
|
||||
if err == io.EOF && buf.Len() > 0 {
|
||||
return buf.Bytes(), nil
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
buf.Write(chunk)
|
||||
if buf.Len() > MaxLineBytes {
|
||||
return nil, fmt.Errorf("jsonl line too large (> %d bytes)", MaxLineBytes)
|
||||
}
|
||||
if !isPrefix {
|
||||
break
|
||||
}
|
||||
}
|
||||
return buf.Bytes(), nil
|
||||
}
|
||||
|
||||
func EncodeLine(w io.Writer, v any) error {
|
||||
b, err := json.Marshal(v)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
b = append(b, '\n')
|
||||
_, err = w.Write(b)
|
||||
return err
|
||||
}
|
||||
|
||||
func DecodeRequestLine(line []byte) (*Request, error) {
|
||||
var req Request
|
||||
if err := json.Unmarshal(line, &req); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &req, nil
|
||||
}
|
||||
22
internal/ipc/protocol.go
Normal file
22
internal/ipc/protocol.go
Normal file
@@ -0,0 +1,22 @@
|
||||
package ipc
|
||||
|
||||
// JSONL request/response protocol shared by bleh and blehd.
|
||||
|
||||
type Request struct {
|
||||
ID string `json:"id"`
|
||||
Method string `json:"method"`
|
||||
Params map[string]any `json:"params,omitempty"`
|
||||
}
|
||||
|
||||
type Error struct {
|
||||
Code string `json:"code"`
|
||||
Message string `json:"message"`
|
||||
}
|
||||
|
||||
type Response struct {
|
||||
ID string `json:"id,omitempty"`
|
||||
OK bool `json:"ok"`
|
||||
Result any `json:"result,omitempty"`
|
||||
Error *Error `json:"error,omitempty"`
|
||||
Event string `json:"event,omitempty"`
|
||||
}
|
||||
282
internal/mxw01/mxw01.go
Normal file
282
internal/mxw01/mxw01.go
Normal file
@@ -0,0 +1,282 @@
|
||||
package mxw01
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
"time"
|
||||
|
||||
ble "github.com/go-ble/ble"
|
||||
)
|
||||
|
||||
var (
|
||||
MainServiceUUID = ble.MustParse("ae30")
|
||||
PrintCharacteristic = ble.MustParse("ae01")
|
||||
NotifyCharacteristic = ble.MustParse("ae02")
|
||||
DatCharacteristic = ble.MustParse("ae03")
|
||||
TargetPrinterName = "MXW01"
|
||||
ScanTimeout = 10 * time.Second
|
||||
PrintCommandHeader = []byte{0x22, 0x21}
|
||||
PrintCommandFooter = byte(0xFF)
|
||||
)
|
||||
|
||||
type PrintMode byte
|
||||
|
||||
const (
|
||||
Mode1bpp PrintMode = 0x00
|
||||
Mode4bpp PrintMode = 0x02
|
||||
)
|
||||
|
||||
const (
|
||||
LinePixels = 384
|
||||
MinLines = 86 // firmware refuses to print anything shorter
|
||||
DefaultSleep = 6 * time.Millisecond
|
||||
)
|
||||
|
||||
type Status struct {
|
||||
OK bool `json:"ok"`
|
||||
State string `json:"state"`
|
||||
BatteryPct int `json:"battery"`
|
||||
TempC int `json:"temp"`
|
||||
}
|
||||
|
||||
type Version struct {
|
||||
Version string `json:"version"`
|
||||
PrintType string `json:"printType"`
|
||||
}
|
||||
|
||||
func FindPrinter(ctx context.Context, address string) (ble.Advertisement, error) {
|
||||
var addr ble.Addr
|
||||
var adv ble.Advertisement
|
||||
|
||||
if address != "" {
|
||||
addr = ble.NewAddr(address)
|
||||
}
|
||||
|
||||
ctxScan, cancel := context.WithTimeout(ctx, ScanTimeout)
|
||||
defer cancel()
|
||||
|
||||
err := ble.Scan(ctxScan, false, func(a ble.Advertisement) {
|
||||
if address != "" {
|
||||
if a.Addr().String() == addr.String() {
|
||||
adv = a
|
||||
cancel()
|
||||
}
|
||||
return
|
||||
}
|
||||
if a.LocalName() == TargetPrinterName {
|
||||
adv = a
|
||||
cancel()
|
||||
}
|
||||
}, nil)
|
||||
if err != nil && !errors.Is(err, context.Canceled) {
|
||||
return nil, fmt.Errorf("scan error: %w", err)
|
||||
}
|
||||
if adv == nil {
|
||||
return nil, fmt.Errorf("printer not found")
|
||||
}
|
||||
return adv, nil
|
||||
}
|
||||
|
||||
func DiscoverChars(client ble.Client) (printChr, notifyChr, dataChr *ble.Characteristic, err error) {
|
||||
services, err := client.DiscoverServices([]ble.UUID{MainServiceUUID})
|
||||
if err != nil || len(services) == 0 {
|
||||
return nil, nil, nil, fmt.Errorf("service discovery failed: %v", err)
|
||||
}
|
||||
svc := services[0]
|
||||
chars, err := client.DiscoverCharacteristics(nil, svc)
|
||||
if err != nil {
|
||||
return nil, nil, nil, fmt.Errorf("characteristic discovery failed: %v", err)
|
||||
}
|
||||
for _, c := range chars {
|
||||
switch c.UUID.String() {
|
||||
case PrintCharacteristic.String():
|
||||
printChr = c
|
||||
case NotifyCharacteristic.String():
|
||||
notifyChr = c
|
||||
case DatCharacteristic.String():
|
||||
dataChr = c
|
||||
}
|
||||
}
|
||||
return printChr, notifyChr, dataChr, nil
|
||||
}
|
||||
|
||||
func BuildCommand(cmdId byte, payload []byte) []byte {
|
||||
cmd := append([]byte{}, PrintCommandHeader...)
|
||||
cmd = append(cmd, cmdId)
|
||||
cmd = append(cmd, 0x00) // reserved
|
||||
cmd = append(cmd, byte(len(payload)&0xFF), byte(len(payload)>>8))
|
||||
cmd = append(cmd, payload...)
|
||||
cmd = append(cmd, CalculateCRC8(payload))
|
||||
cmd = append(cmd, PrintCommandFooter)
|
||||
return cmd
|
||||
}
|
||||
|
||||
func SendSimpleCommand(client ble.Client, printChr *ble.Characteristic, cmdId byte) error {
|
||||
cmd := BuildCommand(cmdId, []byte{0x00})
|
||||
return client.WriteCharacteristic(printChr, cmd, true)
|
||||
}
|
||||
|
||||
func SendLineCommand(client ble.Client, printChr *ble.Characteristic, cmdId byte, lines uint) error {
|
||||
param := []byte{byte(lines & 0xFF), byte(lines >> 8)}
|
||||
cmd := BuildCommand(cmdId, param)
|
||||
return client.WriteCharacteristic(printChr, cmd, true)
|
||||
}
|
||||
|
||||
func ParseNotification(data []byte) (cmd byte, payloadLen int, err error) {
|
||||
if len(data) < 6 {
|
||||
return 0, 0, fmt.Errorf("malformed notification (too short)")
|
||||
}
|
||||
if data[0] != 0x22 || data[1] != 0x21 {
|
||||
return 0, 0, fmt.Errorf("invalid notification header")
|
||||
}
|
||||
cmd = data[2]
|
||||
payloadLen = int(data[4]) | int(data[5])<<8
|
||||
return cmd, payloadLen, nil
|
||||
}
|
||||
|
||||
func DecodeStatusNotification(data []byte) (*Status, error) {
|
||||
_, _, err := ParseNotification(data)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(data) < 14 {
|
||||
return nil, fmt.Errorf("malformed status notification")
|
||||
}
|
||||
battery := int(data[9])
|
||||
temp := int(data[10])
|
||||
statusOk := data[12] == 0
|
||||
statusCode := data[6]
|
||||
errCode := data[13]
|
||||
|
||||
statusMsg := "Unknown"
|
||||
if statusOk {
|
||||
switch statusCode {
|
||||
case 0x0:
|
||||
statusMsg = "Standby"
|
||||
case 0x1:
|
||||
statusMsg = "Printing"
|
||||
case 0x2:
|
||||
statusMsg = "Feeding paper"
|
||||
case 0x3:
|
||||
statusMsg = "Ejecting paper"
|
||||
}
|
||||
} else {
|
||||
switch errCode {
|
||||
case 0x1, 0x9:
|
||||
statusMsg = "No paper"
|
||||
case 0x4:
|
||||
statusMsg = "Overheated"
|
||||
case 0x8:
|
||||
statusMsg = "Low battery"
|
||||
}
|
||||
}
|
||||
|
||||
return &Status{OK: statusOk, State: statusMsg, BatteryPct: battery, TempC: temp}, nil
|
||||
}
|
||||
|
||||
func DecodeBatteryNotification(data []byte) (int, error) {
|
||||
_, _, err := ParseNotification(data)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
if len(data) < 7 {
|
||||
return 0, fmt.Errorf("malformed battery notification")
|
||||
}
|
||||
return int(data[6]), nil
|
||||
}
|
||||
|
||||
func DecodePrintTypeNotification(data []byte) (string, error) {
|
||||
_, _, err := ParseNotification(data)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
if len(data) < 7 {
|
||||
return "", fmt.Errorf("malformed printtype notification")
|
||||
}
|
||||
switch data[6] {
|
||||
case 0x01:
|
||||
return "High pressure", nil
|
||||
case 0xFF:
|
||||
return "Unknown", nil
|
||||
default:
|
||||
return "Low pressure", nil
|
||||
}
|
||||
}
|
||||
|
||||
func DecodeVersionNotification(data []byte) (*Version, error) {
|
||||
_, dataLen, err := ParseNotification(data)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(data) < 15 {
|
||||
return nil, fmt.Errorf("malformed version notification (too short)")
|
||||
}
|
||||
if len(data) < 14+dataLen {
|
||||
return nil, fmt.Errorf("malformed version notification")
|
||||
}
|
||||
ver := string(data[6 : 6+dataLen])
|
||||
pt := "Unknown"
|
||||
switch data[14] {
|
||||
case 0x32:
|
||||
pt = "High pressure"
|
||||
case 0x31:
|
||||
pt = "Low pressure"
|
||||
}
|
||||
return &Version{Version: ver, PrintType: pt}, nil
|
||||
}
|
||||
|
||||
func DecodeQueryCountNotification(data []byte) ([]byte, error) {
|
||||
_, _, err := ParseNotification(data)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if len(data) < 12 {
|
||||
return nil, fmt.Errorf("malformed querycount notification")
|
||||
}
|
||||
out := make([]byte, 6)
|
||||
copy(out, data[6:12])
|
||||
return out, nil
|
||||
}
|
||||
|
||||
func CalculateCRC8(data []byte) byte {
|
||||
table := [256]byte{
|
||||
0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15,
|
||||
0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d,
|
||||
0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65,
|
||||
0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d,
|
||||
0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5,
|
||||
0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd,
|
||||
0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85,
|
||||
0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd,
|
||||
0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2,
|
||||
0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea,
|
||||
0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2,
|
||||
0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a,
|
||||
0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32,
|
||||
0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a,
|
||||
0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42,
|
||||
0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a,
|
||||
0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c,
|
||||
0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4,
|
||||
0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec,
|
||||
0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4,
|
||||
0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c,
|
||||
0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44,
|
||||
0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c,
|
||||
0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34,
|
||||
0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b,
|
||||
0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d, 0x64, 0x63,
|
||||
0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b,
|
||||
0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13,
|
||||
0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb,
|
||||
0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83,
|
||||
0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb,
|
||||
0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3,
|
||||
}
|
||||
crc := byte(0)
|
||||
for _, b := range data {
|
||||
crc = table[crc^b]
|
||||
}
|
||||
return crc
|
||||
}
|
||||
56
internal/mxw01/print.go
Normal file
56
internal/mxw01/print.go
Normal file
@@ -0,0 +1,56 @@
|
||||
package mxw01
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"time"
|
||||
|
||||
ble "github.com/go-ble/ble"
|
||||
)
|
||||
|
||||
func SendImageBufferToPrinter(client ble.Client, dataChr, printChr *ble.Characteristic, pixels []byte, height int, mode PrintMode, intensity byte, attMTU int) error {
|
||||
cmd := BuildCommand(0xA2, []byte{intensity})
|
||||
if err := client.WriteCharacteristic(printChr, cmd, true); err != nil {
|
||||
return fmt.Errorf("intensity set failed: %v", err)
|
||||
}
|
||||
|
||||
param := []byte{byte(height & 0xFF), byte(height >> 8), 0x30, byte(mode)}
|
||||
cmd = BuildCommand(0xA9, param)
|
||||
if err := client.WriteCharacteristic(printChr, cmd, true); err != nil {
|
||||
return fmt.Errorf("print command failed: %v", err)
|
||||
}
|
||||
|
||||
bytesPerLine := LinePixels / 8
|
||||
if mode == Mode4bpp {
|
||||
bytesPerLine = LinePixels / 2
|
||||
}
|
||||
|
||||
// ATT_MTU includes 3 bytes of ATT overhead for Write Command/Request.
|
||||
payloadMTU := 20
|
||||
if attMTU > 3 {
|
||||
payloadMTU = attMTU - 3
|
||||
}
|
||||
if payloadMTU < 1 {
|
||||
payloadMTU = 1
|
||||
}
|
||||
|
||||
for y := 0; y < height; y++ {
|
||||
slice := pixels[y*bytesPerLine : (y+1)*bytesPerLine]
|
||||
for offset := 0; offset < len(slice); offset += payloadMTU {
|
||||
end := offset + payloadMTU
|
||||
if end > len(slice) {
|
||||
end = len(slice)
|
||||
}
|
||||
chunk := slice[offset:end]
|
||||
if err := client.WriteCharacteristic(dataChr, chunk, true); err != nil {
|
||||
return fmt.Errorf("line %d chunk write failed: %v", y, err)
|
||||
}
|
||||
time.Sleep(DefaultSleep)
|
||||
}
|
||||
}
|
||||
|
||||
cmd = BuildCommand(0xAD, []byte{0x00})
|
||||
if err := client.WriteCharacteristic(printChr, cmd, true); err != nil {
|
||||
return fmt.Errorf("flush failed: %v", err)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
Reference in New Issue
Block a user