New daemon architecture
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bleh/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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674
bleh/LICENSE.gplv3
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bleh/LICENSE.gplv3
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GNU GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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Everyone is permitted to copy and distribute verbatim copies
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Preamble
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||||||
|
Corresponding Source conveyed, and Installation Information provided,
|
||||||
|
in accord with this section must be in a format that is publicly
|
||||||
|
documented (and with an implementation available to the public in
|
||||||
|
source code form), and must require no special password or key for
|
||||||
|
unpacking, reading or copying.
|
||||||
|
|
||||||
|
7. Additional Terms.
|
||||||
|
|
||||||
|
"Additional permissions" are terms that supplement the terms of this
|
||||||
|
License by making exceptions from one or more of its conditions.
|
||||||
|
Additional permissions that are applicable to the entire Program shall
|
||||||
|
be treated as though they were included in this License, to the extent
|
||||||
|
that they are valid under applicable law. If additional permissions
|
||||||
|
apply only to part of the Program, that part may be used separately
|
||||||
|
under those permissions, but the entire Program remains governed by
|
||||||
|
this License without regard to the additional permissions.
|
||||||
|
|
||||||
|
When you convey a copy of a covered work, you may at your option
|
||||||
|
remove any additional permissions from that copy, or from any part of
|
||||||
|
it. (Additional permissions may be written to require their own
|
||||||
|
removal in certain cases when you modify the work.) You may place
|
||||||
|
additional permissions on material, added by you to a covered work,
|
||||||
|
for which you have or can give appropriate copyright permission.
|
||||||
|
|
||||||
|
Notwithstanding any other provision of this License, for material you
|
||||||
|
add to a covered work, you may (if authorized by the copyright holders of
|
||||||
|
that material) supplement the terms of this License with terms:
|
||||||
|
|
||||||
|
a) Disclaiming warranty or limiting liability differently from the
|
||||||
|
terms of sections 15 and 16 of this License; or
|
||||||
|
|
||||||
|
b) Requiring preservation of specified reasonable legal notices or
|
||||||
|
author attributions in that material or in the Appropriate Legal
|
||||||
|
Notices displayed by works containing it; or
|
||||||
|
|
||||||
|
c) Prohibiting misrepresentation of the origin of that material, or
|
||||||
|
requiring that modified versions of such material be marked in
|
||||||
|
reasonable ways as different from the original version; or
|
||||||
|
|
||||||
|
d) Limiting the use for publicity purposes of names of licensors or
|
||||||
|
authors of the material; or
|
||||||
|
|
||||||
|
e) Declining to grant rights under trademark law for use of some
|
||||||
|
trade names, trademarks, or service marks; or
|
||||||
|
|
||||||
|
f) Requiring indemnification of licensors and authors of that
|
||||||
|
material by anyone who conveys the material (or modified versions of
|
||||||
|
it) with contractual assumptions of liability to the recipient, for
|
||||||
|
any liability that these contractual assumptions directly impose on
|
||||||
|
those licensors and authors.
|
||||||
|
|
||||||
|
All other non-permissive additional terms are considered "further
|
||||||
|
restrictions" within the meaning of section 10. If the Program as you
|
||||||
|
received it, or any part of it, contains a notice stating that it is
|
||||||
|
governed by this License along with a term that is a further
|
||||||
|
restriction, you may remove that term. If a license document contains
|
||||||
|
a further restriction but permits relicensing or conveying under this
|
||||||
|
License, you may add to a covered work material governed by the terms
|
||||||
|
of that license document, provided that the further restriction does
|
||||||
|
not survive such relicensing or conveying.
|
||||||
|
|
||||||
|
If you add terms to a covered work in accord with this section, you
|
||||||
|
must place, in the relevant source files, a statement of the
|
||||||
|
additional terms that apply to those files, or a notice indicating
|
||||||
|
where to find the applicable terms.
|
||||||
|
|
||||||
|
Additional terms, permissive or non-permissive, may be stated in the
|
||||||
|
form of a separately written license, or stated as exceptions;
|
||||||
|
the above requirements apply either way.
|
||||||
|
|
||||||
|
8. Termination.
|
||||||
|
|
||||||
|
You may not propagate or modify a covered work except as expressly
|
||||||
|
provided under this License. Any attempt otherwise to propagate or
|
||||||
|
modify it is void, and will automatically terminate your rights under
|
||||||
|
this License (including any patent licenses granted under the third
|
||||||
|
paragraph of section 11).
|
||||||
|
|
||||||
|
However, if you cease all violation of this License, then your
|
||||||
|
license from a particular copyright holder is reinstated (a)
|
||||||
|
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
bleh/LICENSE.mit
Normal file
21
bleh/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
bleh/Makefile
Normal file
104
bleh/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
bleh/README.md
Normal file
96
bleh/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.
|
||||||
BIN
bleh/bin/blehd
Executable file
BIN
bleh/bin/blehd
Executable file
Binary file not shown.
BIN
bleh/bleh.jpg
Normal file
BIN
bleh/bleh.jpg
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 32 KiB |
424
bleh/cmd/blehd/main.go
Normal file
424
bleh/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)
|
||||||
|
}
|
||||||
BIN
bleh/demo.jpg
Normal file
BIN
bleh/demo.jpg
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 115 KiB |
85
bleh/dist/INSTALL.md
vendored
Normal file
85
bleh/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 $USER
|
||||||
|
# then re-login
|
||||||
|
```
|
||||||
|
|
||||||
|
Then run blehd with `--group bleh`.
|
||||||
|
|
||||||
|
## systemd service (recommended)
|
||||||
|
|
||||||
|
Install the unit:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
sudo make install-systemd
|
||||||
|
```
|
||||||
|
|
||||||
|
Enable it:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
sudo systemctl daemon-reload
|
||||||
|
sudo systemctl enable --now blehd.service
|
||||||
|
```
|
||||||
|
|
||||||
|
This will run `blehd` as root, listening on:
|
||||||
|
|
||||||
|
- `/run/bleh/blehd.sock`
|
||||||
|
|
||||||
|
To uninstall:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
sudo make uninstall-systemd
|
||||||
|
```
|
||||||
|
|
||||||
|
## OpenRC service
|
||||||
|
|
||||||
|
Install the init script:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
sudo make install-openrc
|
||||||
|
```
|
||||||
|
|
||||||
|
Enable it:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
sudo rc-update add blehd default
|
||||||
|
sudo rc-service blehd start
|
||||||
|
```
|
||||||
|
|
||||||
|
To uninstall:
|
||||||
|
|
||||||
|
```sh
|
||||||
|
sudo make uninstall-openrc
|
||||||
|
```
|
||||||
17
bleh/dist/openrc/blehd
vendored
Normal file
17
bleh/dist/openrc/blehd
vendored
Normal file
@@ -0,0 +1,17 @@
|
|||||||
|
#!/sbin/openrc-run
|
||||||
|
|
||||||
|
name="blehd"
|
||||||
|
description="Bleh MXW01 privileged helper daemon"
|
||||||
|
|
||||||
|
command="/usr/local/bin/blehd"
|
||||||
|
command_args="--socket /run/bleh/blehd.sock --group bleh"
|
||||||
|
command_background=true
|
||||||
|
pidfile="/run/${name}.pid"
|
||||||
|
|
||||||
|
start_pre() {
|
||||||
|
checkpath -d -m 0755 /run/bleh
|
||||||
|
}
|
||||||
|
|
||||||
|
depend() {
|
||||||
|
after bluetooth
|
||||||
|
}
|
||||||
27
bleh/dist/systemd/blehd-root.service
vendored
Normal file
27
bleh/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
bleh/go.mod
Normal file
19
bleh/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
bleh/internal/imageproc/imageproc.go
Normal file
189
bleh/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
bleh/internal/ipc/jsonl.go
Normal file
55
bleh/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
bleh/internal/ipc/protocol.go
Normal file
22
bleh/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
bleh/internal/mxw01/mxw01.go
Normal file
282
bleh/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
bleh/internal/mxw01/print.go
Normal file
56
bleh/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
|
||||||
|
}
|
||||||
845
bleh/main.go
Normal file
845
bleh/main.go
Normal file
@@ -0,0 +1,845 @@
|
|||||||
|
/*
|
||||||
|
This file is part of Bleh!.
|
||||||
|
|
||||||
|
Bleh! 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.
|
||||||
|
|
||||||
|
Bleh! 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 Foobar. If not, see <https://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
//go:build ignore
|
||||||
|
|
||||||
|
package main
|
||||||
|
|
||||||
|
import (
|
||||||
|
"context"
|
||||||
|
"flag"
|
||||||
|
"fmt"
|
||||||
|
"image"
|
||||||
|
"image/color"
|
||||||
|
_ "image/gif"
|
||||||
|
_ "image/jpeg"
|
||||||
|
_ "image/png"
|
||||||
|
"io"
|
||||||
|
"log"
|
||||||
|
"os"
|
||||||
|
"os/signal"
|
||||||
|
"time"
|
||||||
|
|
||||||
|
"github.com/disintegration/imaging"
|
||||||
|
ble "github.com/go-ble/ble"
|
||||||
|
"github.com/go-ble/ble/linux"
|
||||||
|
dither "github.com/makeworld-the-better-one/dither"
|
||||||
|
)
|
||||||
|
|
||||||
|
const minLines = 86 // firmware refuses to print anything shorter
|
||||||
|
|
||||||
|
var (
|
||||||
|
mainServiceUUID = ble.MustParse("ae30")
|
||||||
|
printCharacteristic = ble.MustParse("ae01")
|
||||||
|
notifyCharacteristic = ble.MustParse("ae02")
|
||||||
|
dataCharacteristic = ble.MustParse("ae03")
|
||||||
|
targetPrinterName = "MXW01"
|
||||||
|
scanTimeout = 10 * time.Second
|
||||||
|
reconnectDelay = 250 * time.Millisecond
|
||||||
|
printCommandHeader = []byte{0x22, 0x21}
|
||||||
|
printCommandFooter = byte(0xFF)
|
||||||
|
intensity int
|
||||||
|
mode string
|
||||||
|
ditherType string
|
||||||
|
getStatus bool
|
||||||
|
getBattery bool
|
||||||
|
getVersion bool
|
||||||
|
getPrintType bool
|
||||||
|
getQueryCount bool
|
||||||
|
ejectPaper uint
|
||||||
|
retractPaper uint
|
||||||
|
outputPath string
|
||||||
|
address string
|
||||||
|
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.Usage = func() {
|
||||||
|
fmt.Fprintf(os.Stderr, "Bleh! Cat Printer Utility for MXW01, version %s\n", version)
|
||||||
|
fmt.Fprintf(os.Stderr, "Usage: %s [options] <image_path or ->\n", os.Args[0])
|
||||||
|
fmt.Fprintln(os.Stderr, `
|
||||||
|
Options:
|
||||||
|
-h, --help Show this help message
|
||||||
|
-a, --address <mac> Connect to printer by MAC address
|
||||||
|
-i, --intensity int Print intensity (0-100) (default 80)
|
||||||
|
-m, --mode string Print mode: 1bpp or 4bpp (default "1bpp")
|
||||||
|
-d, --dither string Dither method: none, floyd, bayer2x2, bayer4x4, bayer8x8, bayer16x16, atkinson, jjn (default "none")
|
||||||
|
-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 uint Eject paper by N lines
|
||||||
|
-R, --retract uint Retract paper by N lines
|
||||||
|
-o, --output <file> Output PNG preview instead of printing.
|
||||||
|
If <file> is "-", writes PNG to stdout.
|
||||||
|
<image_path or -> Path to PNG/JPG to print, or '-' for stdin`)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func parseNotification(data []byte) {
|
||||||
|
// Minimum frame size for header + cmd + reserved + len (2 bytes)
|
||||||
|
if len(data) < 6 {
|
||||||
|
fmt.Printf("Malformed notification (too short), raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
if data[0] != 0x22 || data[1] != 0x21 {
|
||||||
|
fmt.Printf("Invalid notification header, raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
cmd := data[2]
|
||||||
|
dataLen := int(data[4]) | int(data[5])<<8
|
||||||
|
|
||||||
|
switch cmd {
|
||||||
|
case 0xA1: // GetStatus
|
||||||
|
if len(data) < 14 {
|
||||||
|
fmt.Printf("Malformed status notification, raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
battery := data[9]
|
||||||
|
temp := 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"
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fmt.Printf("Status: %v (%s), Battery: %d, Temp: %d\n", statusOk, statusMsg, battery, temp)
|
||||||
|
|
||||||
|
case 0xA3: // EjectPaper
|
||||||
|
fmt.Println("Ejecting paper...")
|
||||||
|
|
||||||
|
case 0xA4: // RetractPaper
|
||||||
|
fmt.Println("Retracting paper...")
|
||||||
|
|
||||||
|
case 0xA7: // QueryCount
|
||||||
|
if len(data) < 12 {
|
||||||
|
fmt.Printf("Malformed querycount notification, raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
fmt.Printf("Query count: % X\n", data[6:12])
|
||||||
|
|
||||||
|
case 0xA9: // Print
|
||||||
|
printOk := data[6] == 0
|
||||||
|
fmt.Printf("Print status: %s\n", map[bool]string{true: "Ok", false: "Failure"}[printOk])
|
||||||
|
|
||||||
|
case 0xAA: // PrintComplete
|
||||||
|
fmt.Println("Printing finished.")
|
||||||
|
|
||||||
|
case 0xAB: // BatteryLevel
|
||||||
|
if len(data) < 7 {
|
||||||
|
fmt.Printf("Malformed battery notification, raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
fmt.Printf("Battery level: %d\n", data[6])
|
||||||
|
|
||||||
|
case 0xB0: // GetPrintType
|
||||||
|
if len(data) < 7 {
|
||||||
|
fmt.Printf("Malformed printtype notification, raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
var t string
|
||||||
|
switch data[6] {
|
||||||
|
case 0x01:
|
||||||
|
t = `High pressure`
|
||||||
|
case 0xFF:
|
||||||
|
t = `"Unknown`
|
||||||
|
default:
|
||||||
|
t = `Low pressure`
|
||||||
|
}
|
||||||
|
fmt.Printf("Print type: %s\n", t)
|
||||||
|
|
||||||
|
case 0xB1: // GetVersion
|
||||||
|
// Needs at least header(2)+cmd/res/len(4)+payload(dataLen)+... (we also read data[14])
|
||||||
|
if len(data) < 15 {
|
||||||
|
fmt.Printf("Malformed version notification (too short), raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
if len(data) < 6+dataLen {
|
||||||
|
fmt.Printf("Malformed version notification (bad length), raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
if len(data) < 14+dataLen {
|
||||||
|
fmt.Printf("Malformed version notification, raw: % X\n", data)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
version := string(data[6 : 6+dataLen])
|
||||||
|
var t string
|
||||||
|
switch data[14] {
|
||||||
|
case 0x32:
|
||||||
|
t = `High pressure`
|
||||||
|
case 0x31:
|
||||||
|
t = `Low pressure`
|
||||||
|
default:
|
||||||
|
t = `Unknown`
|
||||||
|
}
|
||||||
|
fmt.Printf("Version: %s, Print type: %s\n", version, t)
|
||||||
|
|
||||||
|
default:
|
||||||
|
fmt.Printf("Received notification for unknown command: 0x%02X\n", cmd)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
const (
|
||||||
|
linePixels = 384
|
||||||
|
bytesPerLine = linePixels / 8
|
||||||
|
)
|
||||||
|
|
||||||
|
// 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
|
||||||
|
}
|
||||||
|
|
||||||
|
// decodeImageFromReader reads and decodes an image from any io.Reader
|
||||||
|
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
|
||||||
|
}
|
||||||
|
|
||||||
|
// loadImageMonoFromImage processes an image.Image to 1bpp packed byte format
|
||||||
|
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(linePixels) / ratio)
|
||||||
|
if height <= 0 {
|
||||||
|
return nil, 0, fmt.Errorf("computed invalid height: %d", height)
|
||||||
|
}
|
||||||
|
img = imaging.Resize(img, 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, (linePixels*height)/8)
|
||||||
|
for y := 0; y < height; y++ {
|
||||||
|
for x := 0; x < linePixels; x++ {
|
||||||
|
gray := color.GrayModel.Convert(img.At(x, y)).(color.Gray)
|
||||||
|
if gray.Y < 128 {
|
||||||
|
idx := (y*linePixels + x) / 8
|
||||||
|
pixels[idx] |= 1 << (x % 8)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return pixels, height, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// loadImage4BitFromImage processes an image.Image to 4bpp packed byte format
|
||||||
|
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(linePixels) / ratio)
|
||||||
|
if height <= 0 {
|
||||||
|
return nil, 0, fmt.Errorf("computed invalid height: %d", height)
|
||||||
|
}
|
||||||
|
img = imaging.Resize(img, 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 := 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 // 0..15, inverted logic
|
||||||
|
idx := (y*width + x) >> 1
|
||||||
|
shift := uint(((x & 1) ^ 1) << 2)
|
||||||
|
pixels[idx] |= level << shift
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return pixels, height, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
// Extend sendImageToPrinter to handle 4-bit mode
|
||||||
|
type PrintMode byte
|
||||||
|
|
||||||
|
const (
|
||||||
|
Mode1bpp PrintMode = 0x00
|
||||||
|
Mode4bpp PrintMode = 0x02
|
||||||
|
)
|
||||||
|
|
||||||
|
func sendImageBufferToPrinter(client ble.Client, dataChr, printChr *ble.Characteristic, pixels []byte, height int, mode PrintMode, intensity byte, attMTU int) error {
|
||||||
|
fmt.Printf("Sending image: %dx%d lines\n", linePixels, height)
|
||||||
|
|
||||||
|
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(6 * time.Millisecond)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
cmd = buildCommand(0xAD, []byte{0x00})
|
||||||
|
if err := client.WriteCharacteristic(printChr, cmd, true); err != nil {
|
||||||
|
return fmt.Errorf("flush failed: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func padImageToMinLines(img image.Image, minLines int) image.Image {
|
||||||
|
bounds := img.Bounds()
|
||||||
|
if bounds.Dy() >= minLines {
|
||||||
|
return img
|
||||||
|
}
|
||||||
|
// Create a new white image
|
||||||
|
dst := imaging.New(bounds.Dx(), minLines, color.White)
|
||||||
|
// Paste the original image at the top
|
||||||
|
dst = imaging.Paste(dst, img, image.Pt(0, 0))
|
||||||
|
return dst
|
||||||
|
}
|
||||||
|
|
||||||
|
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 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
|
||||||
|
}
|
||||||
|
|
||||||
|
func findPrinter(ctx context.Context) (ble.Advertisement, error) {
|
||||||
|
var addr ble.Addr
|
||||||
|
var adv ble.Advertisement
|
||||||
|
|
||||||
|
if address != "" {
|
||||||
|
log.Printf("Connecting directly to MAC address: %s", address)
|
||||||
|
addr = ble.NewAddr(address)
|
||||||
|
fmt.Printf("Using address: %s\n", addr)
|
||||||
|
}
|
||||||
|
|
||||||
|
ctxScan, cancel := context.WithTimeout(ctx, scanTimeout)
|
||||||
|
log.Println("Scanning for printer...")
|
||||||
|
err := ble.Scan(ctxScan, false, func(a ble.Advertisement) {
|
||||||
|
if address != "" {
|
||||||
|
if a.Addr().String() == addr.String() { // Wonder why this works and not direct comparison
|
||||||
|
adv = a
|
||||||
|
cancel()
|
||||||
|
}
|
||||||
|
} else if a.LocalName() == targetPrinterName {
|
||||||
|
adv = a
|
||||||
|
cancel()
|
||||||
|
}
|
||||||
|
}, nil)
|
||||||
|
if err != nil && err != context.Canceled {
|
||||||
|
return nil, fmt.Errorf("scan error, %v", err)
|
||||||
|
}
|
||||||
|
if adv == nil {
|
||||||
|
return nil, fmt.Errorf("printer not found")
|
||||||
|
}
|
||||||
|
log.Println("Found target printer with address:", adv.Addr().String())
|
||||||
|
return adv, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func discoverChars(client ble.Client) (*ble.Characteristic, *ble.Characteristic, *ble.Characteristic, error) {
|
||||||
|
var printChr, notifyChr, dataChr *ble.Characteristic
|
||||||
|
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 dataCharacteristic.String():
|
||||||
|
dataChr = c
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return printChr, notifyChr, dataChr, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func subToNotifs(client ble.Client, notifyChr *ble.Characteristic) error {
|
||||||
|
if notifyChr != nil {
|
||||||
|
_, _ = client.DiscoverDescriptors(nil, notifyChr)
|
||||||
|
err := client.Subscribe(notifyChr, false, func(b []byte) {
|
||||||
|
parseNotification(b)
|
||||||
|
})
|
||||||
|
if err != nil {
|
||||||
|
return fmt.Errorf("%v", err)
|
||||||
|
} else {
|
||||||
|
log.Println("Subscribed to printer notifications.")
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
return fmt.Errorf("missing notification characteristic")
|
||||||
|
}
|
||||||
|
return nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func loadAndProcessImage(imagePath string, printMode PrintMode, ditherType string) ([]byte, int, error) {
|
||||||
|
img, err := decodeImage(imagePath)
|
||||||
|
if err != nil {
|
||||||
|
return nil, 0, fmt.Errorf("image load error: %v", err)
|
||||||
|
}
|
||||||
|
img = padImageToMinLines(img, minLines)
|
||||||
|
var pixels []byte
|
||||||
|
var height int
|
||||||
|
|
||||||
|
// Convert image to the desired format
|
||||||
|
switch printMode {
|
||||||
|
case Mode1bpp:
|
||||||
|
pixels, height, err = loadImageMonoFromImage(img, ditherType)
|
||||||
|
case Mode4bpp:
|
||||||
|
pixels, height, err = loadImage4BitFromImage(img, ditherType)
|
||||||
|
}
|
||||||
|
if err != nil {
|
||||||
|
return nil, 0, fmt.Errorf("image conversion error: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
return pixels, height, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
func loadPrinter(ctx context.Context) (ble.Client, *ble.Characteristic, *ble.Characteristic, *ble.Characteristic, int, error) {
|
||||||
|
// Find printer
|
||||||
|
adv, err := findPrinter(ctx)
|
||||||
|
if err != nil {
|
||||||
|
return nil, nil, nil, nil, 0, fmt.Errorf("failed to find printer: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Connect to printer
|
||||||
|
log.Println("Connecting...")
|
||||||
|
client, err := ble.Dial(ctx, adv.Addr())
|
||||||
|
if err != nil {
|
||||||
|
return nil, nil, nil, nil, 0, fmt.Errorf("connect failed: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Negotiate large MTU if possible
|
||||||
|
mtu, err := client.ExchangeMTU(100)
|
||||||
|
if err != nil {
|
||||||
|
log.Printf("MTU negotiation failed: %v", err)
|
||||||
|
mtu = 23 // default ATT MTU
|
||||||
|
} else {
|
||||||
|
log.Printf("Negotiated ATT MTU: %d", mtu)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Discover services and characteristics
|
||||||
|
printChr, notifyChr, dataChr, err := discoverChars(client)
|
||||||
|
if err != nil {
|
||||||
|
client.CancelConnection()
|
||||||
|
return nil, nil, nil, nil, 0, fmt.Errorf("characteristic discovery failed: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
return client, printChr, notifyChr, dataChr, mtu, nil
|
||||||
|
}
|
||||||
|
|
||||||
|
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
|
||||||
|
}
|
||||||
|
|
||||||
|
// Get print mode
|
||||||
|
var printMode PrintMode
|
||||||
|
switch mode {
|
||||||
|
case "1bpp":
|
||||||
|
printMode = Mode1bpp
|
||||||
|
case "4bpp":
|
||||||
|
printMode = Mode4bpp
|
||||||
|
default:
|
||||||
|
fmt.Println("Invalid mode. Use '1bpp' or '4bpp'.")
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
// Get image path
|
||||||
|
imagePath := flag.Arg(0)
|
||||||
|
|
||||||
|
pixels, height, err := []byte(nil), int(0), error(nil)
|
||||||
|
|
||||||
|
if imagePath != "" {
|
||||||
|
pixels, height, err = loadAndProcessImage(imagePath, printMode, ditherType)
|
||||||
|
if err != nil {
|
||||||
|
log.Fatalf("Failed to load and process image: %v", err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if outputPath != "" {
|
||||||
|
var previewImg image.Image
|
||||||
|
switch printMode {
|
||||||
|
case Mode1bpp:
|
||||||
|
previewImg = renderPreviewFrom1bpp(pixels, linePixels, height)
|
||||||
|
case Mode4bpp:
|
||||||
|
previewImg = renderPreviewFrom4bpp(pixels, 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 = f
|
||||||
|
}
|
||||||
|
err = imaging.Encode(out, previewImg, imaging.PNG)
|
||||||
|
if err != nil {
|
||||||
|
log.Fatalf("Failed to write PNG preview: %v", err)
|
||||||
|
}
|
||||||
|
if outputPath != "-" {
|
||||||
|
log.Printf("Preview PNG written to %s\n", outputPath)
|
||||||
|
}
|
||||||
|
return
|
||||||
|
}
|
||||||
|
|
||||||
|
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
|
||||||
|
defer stop()
|
||||||
|
|
||||||
|
if needPrinter {
|
||||||
|
// Initialize BLE device once. Re-initializing can fail with "device busy" on some stacks.
|
||||||
|
d, err := linux.NewDevice()
|
||||||
|
if err != nil {
|
||||||
|
log.Fatalf("Failed to open BLE device: %v", err)
|
||||||
|
}
|
||||||
|
ble.SetDefaultDevice(d)
|
||||||
|
|
||||||
|
// Phase 1: query/eject/retract
|
||||||
|
if needNotifications {
|
||||||
|
client, printChr, notifyChr, _, _, err := loadPrinter(ctx)
|
||||||
|
if err != nil {
|
||||||
|
log.Fatalf("Failed to load printer: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Subscribe to notifications
|
||||||
|
err = subToNotifs(client, notifyChr)
|
||||||
|
if err != nil {
|
||||||
|
client.CancelConnection()
|
||||||
|
log.Fatalf("Failed to subscribe to notifications: %v", err)
|
||||||
|
}
|
||||||
|
|
||||||
|
// TODO: check if the firmware allows more than one command at a time.
|
||||||
|
// For now we run query commands, disconnect, then reconnect for printing.
|
||||||
|
sendOrLog := func(err error, what string) {
|
||||||
|
if err != nil {
|
||||||
|
log.Printf("%s failed: %v", what, err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if getStatus {
|
||||||
|
sendOrLog(sendSimpleCommand(client, printChr, 0xA1), "status")
|
||||||
|
}
|
||||||
|
if getBattery {
|
||||||
|
sendOrLog(sendSimpleCommand(client, printChr, 0xAB), "battery")
|
||||||
|
}
|
||||||
|
if getVersion {
|
||||||
|
sendOrLog(sendSimpleCommand(client, printChr, 0xB1), "version")
|
||||||
|
}
|
||||||
|
if getPrintType {
|
||||||
|
sendOrLog(sendSimpleCommand(client, printChr, 0xB0), "printtype")
|
||||||
|
}
|
||||||
|
if getQueryCount {
|
||||||
|
sendOrLog(sendSimpleCommand(client, printChr, 0xA7), "querycount")
|
||||||
|
}
|
||||||
|
if ejectPaper > 0 {
|
||||||
|
sendOrLog(sendLineCommand(client, printChr, 0xA3, ejectPaper), "eject")
|
||||||
|
}
|
||||||
|
if retractPaper > 0 {
|
||||||
|
sendOrLog(sendLineCommand(client, printChr, 0xA4, retractPaper), "retract")
|
||||||
|
}
|
||||||
|
log.Println("Waiting for notifications...")
|
||||||
|
time.Sleep(2 * time.Second)
|
||||||
|
client.CancelConnection()
|
||||||
|
// Give BlueZ a moment to release resources before reconnecting.
|
||||||
|
time.Sleep(reconnectDelay)
|
||||||
|
|
||||||
|
if flag.NArg() < 1 {
|
||||||
|
return // no image to print
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Phase 2: print
|
||||||
|
client, printChr, _, dataChr, attMTU, err := loadPrinter(ctx)
|
||||||
|
if err != nil {
|
||||||
|
log.Fatalf("Failed to load printer: %v", err)
|
||||||
|
}
|
||||||
|
defer client.CancelConnection()
|
||||||
|
|
||||||
|
if printChr == nil {
|
||||||
|
log.Fatalf("Missing required print characteristic")
|
||||||
|
}
|
||||||
|
|
||||||
|
i := max(intensity, 0)
|
||||||
|
i = min(i, 100)
|
||||||
|
intensityByte := byte(i)
|
||||||
|
|
||||||
|
if dataChr == nil {
|
||||||
|
log.Fatalf("Missing required data characteristic")
|
||||||
|
}
|
||||||
|
|
||||||
|
err = sendImageBufferToPrinter(client, dataChr, printChr, pixels, height, printMode, intensityByte, attMTU)
|
||||||
|
if err != nil {
|
||||||
|
log.Fatalf("Failed to print image: %v", err)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
log.Println("Done!")
|
||||||
|
}
|
||||||
|
|
||||||
|
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 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
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user