>penguin would shrink the result to fit its screen.
>I declared A5 and Letter paper, media type stationery, and an output bin called face-up.
You can (and should!) define exact dimensions of your screen in `media-size-supported`. It will probably be a non-standard IPP name, that's why you should define that in `media-supported` as `om_NNNmmxYYYmm` or `oe_NNNinxYYYin`
That way you don't need to scale the incoming data, the PC will format it exactly to the dimensions of the screen.
Both PWG Raster and Apple Raster support 1-bit-per-pixel mode (instead of 8-bit-per-pixel you use), that's why the input could be 8 times less in size. Use `print-color-mode-{supported,default}=bi-level` instead of `monochrome` for that. And also tune `urf-supported`'s `W` option, use `W1` for this case.
This is why I like it here. Somebody does irrefutably incredible work outside of their comfort zone, and somebody else goes "yeah actually I was born in that zone. Moulded by it. Here's how to improve it" (in a positive way)
Oh no, I wasn't, and that's definitely not my comfort zone. I mess with the printers and printing stack due to anger, not because I like it.
It's bugs on bugs, with bugs chasing bugs! So little developers, so complex stack with 25 years of technical debt, and little community around because it's not a sexy technology to be involved in.
That's why I have to dive deep and fix my bugs myself if I want to make it work properly as I would like it to. I also ended up making my own print server device, because China did not make a proper one for some reason for all these years.
In Linux it's pretty easy to create such things with cups. A while ago I did a cups backend for my Fujitsu Quaderno A4 [1]. It is super useful to be able to just open any document, in any program that supports printing, and then just "print" it to my device.
Unfortunately printing support seems to go out of fashion, at least in macOS land.
Lately I needed a quick printout of a markdown document. I could have used TextEdit for the raw text, but I wanted the styling too. Learned that neither VSCode, Xcode nor Obsidian can print. (There is a community plugin for Obsidian.)
Very cool. I was expecting to learn about the ins and outs of ink, printheads etc but instead learned "How to build a paper that acts like a printer" which turned out much more entertaining.
Pretty cool work! And it’s nice to see printer discovery works through the standard mDNS!
Regarding the size of the page being sent to the printer, I remember reading that printers used to be postscript interpreters and the result of that program would be the page.
Perhaps that would trade ram for compute, but might be more complex in the end.
I've wanted something like this for a long time to print recipes that I'm about to cook. I don't want my phone in the kitchen getting gunk on it, so I'll usually print on paper, get the gunk on the paper, and then throw it out.
I'm not going to create a recipe PDF and load it on an e-reader. That's too much work. But I will happily press control-P on a recipe web page and select the eink display as the target.
> I was thinking of this, but rendering PDF takes a lot out of a 400KB RAM'd device. It also needs a ton of things to actually work which the ROM can't hold.
PDF is very, very complicated standard which can't be handled properly on tiny MCUs with reasonable performance and spec conformance:
- 4 font formats
- 9 image formats
- blending with transparency
- different colorspaces, each image could use its own on the page
- different dithering algorithms, each image with its own
- the page can have elements from another pages (global elements)
This is only a small part from the top of my head.
Common simple home printers absolutely should not accept regular PDF as an input: thanks to Apple and IETF we now have Apple Raster and PWG Raster for printers, as a part of AirPrint and IPP Everywhere/Mopria driverless printing standards, which are very similar but have slightly different options and headers. It's a simple raster input for printers specifically.
Some companies, such as HP, invented a "raster PDF": PCLm / PCLms. Don't be confused by the name, it's a regular standard-conforming PDF which contain nothing but a full-page JPEG on each page, and don't use any other features. It's created only to be able to open "printed page" (driver output) in a standard PDF viewer on a PC for debugging or business logging needs, but otherwise it's like a regular JPEG with additional per-page metadata.
I was thinking of this, but rendering PDF takes a lot out of a 400KB RAM'd device. It also needs a ton of things to actually work which the ROM can't hold.
I've been seeing the Xteink a lot lately. Should I get an X3 or an X4? I don't really know why I want it, but I have an eInk addiction, so I just need it.
I bought an x4 a month or so ago, zero regrets. It sounds hyperbolic but it’s finally been the thing to actually decouple me from my phone. Whenever I’m out and about, bored, I just slide it out and pick up where I left off reading last. It’s a nicer reading experience on my kobo but the portability and.. frankly charm just can’t be beat.
>penguin would shrink the result to fit its screen. >I declared A5 and Letter paper, media type stationery, and an output bin called face-up.
You can (and should!) define exact dimensions of your screen in `media-size-supported`. It will probably be a non-standard IPP name, that's why you should define that in `media-supported` as `om_NNNmmxYYYmm` or `oe_NNNinxYYYin`
That way you don't need to scale the incoming data, the PC will format it exactly to the dimensions of the screen.
Both PWG Raster and Apple Raster support 1-bit-per-pixel mode (instead of 8-bit-per-pixel you use), that's why the input could be 8 times less in size. Use `print-color-mode-{supported,default}=bi-level` instead of `monochrome` for that. And also tune `urf-supported`'s `W` option, use `W1` for this case.
The screen/dithering could be ass in 1-bit mode, see https://github.com/OpenPrinting/libcupsfilters/pull/160 where I added more dithering options (Linux-only though, Apple seems to abandon their CUPS).
This is why I like it here. Somebody does irrefutably incredible work outside of their comfort zone, and somebody else goes "yeah actually I was born in that zone. Moulded by it. Here's how to improve it" (in a positive way)
Oh no, I wasn't, and that's definitely not my comfort zone. I mess with the printers and printing stack due to anger, not because I like it.
It's bugs on bugs, with bugs chasing bugs! So little developers, so complex stack with 25 years of technical debt, and little community around because it's not a sexy technology to be involved in.
That's why I have to dive deep and fix my bugs myself if I want to make it work properly as I would like it to. I also ended up making my own print server device, because China did not make a proper one for some reason for all these years.
Anger is the only valid emotion when dealing with printers.
That's even cooler
Same feeling when family or friends ask me for help with Micros word about formatting, tables or inserting pictures in the last 25 years….
lovely, this would save me a bunch of memory during transformation and dithering. Will do!
In Linux it's pretty easy to create such things with cups. A while ago I did a cups backend for my Fujitsu Quaderno A4 [1]. It is super useful to be able to just open any document, in any program that supports printing, and then just "print" it to my device.
[1] https://github.com/cristobaltapia/dpt-rp1-cups
> any program that supports printing
Unfortunately printing support seems to go out of fashion, at least in macOS land.
Lately I needed a quick printout of a markdown document. I could have used TextEdit for the raw text, but I wanted the styling too. Learned that neither VSCode, Xcode nor Obsidian can print. (There is a community plugin for Obsidian.)
LOL. TIL you can’t print from VSCode.
Or Obsidian
Very cool. I was expecting to learn about the ins and outs of ink, printheads etc but instead learned "How to build a paper that acts like a printer" which turned out much more entertaining.
glad you liked it!
Pretty cool work! And it’s nice to see printer discovery works through the standard mDNS!
Regarding the size of the page being sent to the printer, I remember reading that printers used to be postscript interpreters and the result of that program would be the page.
Perhaps that would trade ram for compute, but might be more complex in the end.
Good job, but I’m left wanting to know how to build a printer.
If a DIY plotter would do, this site has a long list of different projects
https://mattwidmann.net/notes/pen-plotters/
What if I want a cabinet sized rotating head printer that can print carbonpaper triplets, sounds a machinegun, and has LP0 ON FIRE error message
https://watchbutdonotlearn.github.io
This guy has a project just like that
I'd say it's an eco-friendly printer
There is an open source one https://www.opentools.studio
Nice. I keep wondering if these devices would play nicer with DjVu rather than pdfs and raster formats?
https://djvu.sourceforge.net/
This is amazing!!! It just makes sense. And its just how you would want to use a e reader.
if it looks like a paper, it should act like a paper
You can even fold it, once!
It's also not effective against rock
Funny. But... paper covers rock.
Jan Ken Po!
I don't understand the purpose. What am I missing?
The author "prints" to the eink display. Why not load say the pdf directly?
I've wanted something like this for a long time to print recipes that I'm about to cook. I don't want my phone in the kitchen getting gunk on it, so I'll usually print on paper, get the gunk on the paper, and then throw it out.
I'm not going to create a recipe PDF and load it on an e-reader. That's too much work. But I will happily press control-P on a recipe web page and select the eink display as the target.
I am no cook, but you my friend are cooking something here
From the 4th line in the article:
> But getting stuff onto it was tedious. I had to join its hotspot and open a little upload website in my browser. Yuck.
Anyway, very creative, I like the idea a lot.
> I was thinking of this, but rendering PDF takes a lot out of a 400KB RAM'd device. It also needs a ton of things to actually work which the ROM can't hold.
> Kindles have a ton of RAM, this one didn't.
It's an e-reader. According to the specs it has native support for PDF.
It's an esp32 MCU, even if it can somehow run the PDF render pipeline, it won't be more ideal than just accept the raw byte stream and display.
I love the concept, but I wonder why he wasn’t printing to PDF. Can this device not render PDFs?
PDF is very, very complicated standard which can't be handled properly on tiny MCUs with reasonable performance and spec conformance:
This is only a small part from the top of my head.Common simple home printers absolutely should not accept regular PDF as an input: thanks to Apple and IETF we now have Apple Raster and PWG Raster for printers, as a part of AirPrint and IPP Everywhere/Mopria driverless printing standards, which are very similar but have slightly different options and headers. It's a simple raster input for printers specifically.
Some companies, such as HP, invented a "raster PDF": PCLm / PCLms. Don't be confused by the name, it's a regular standard-conforming PDF which contain nothing but a full-page JPEG on each page, and don't use any other features. It's created only to be able to open "printed page" (driver output) in a standard PDF viewer on a PC for debugging or business logging needs, but otherwise it's like a regular JPEG with additional per-page metadata.
This thing is an e-reader with 16GB of flash and an SD slot. It has native support for PDF.
https://cdn.shopify.com/s/files/1/0759/9344/8689/files/X3-EN...
check page 3. even I was surprised
First I see GIF and PNG missing.
I was thinking of this, but rendering PDF takes a lot out of a 400KB RAM'd device. It also needs a ton of things to actually work which the ROM can't hold.
Kindles have a ton of RAM, this one didn't.
Probably not. It doesn't appear to have enough ram. I'm not sure the CPU is up to that either.
Very cool. I'll be updating to this fork
Thanks. It's rough around the edges, so PRs are open, and there's a recipe in the repo if you want to build your own apps.
We finally have PADDs from Star Trek!
Wow!! I didn't think of that.
I've been seeing the Xteink a lot lately. Should I get an X3 or an X4? I don't really know why I want it, but I have an eInk addiction, so I just need it.
I've owned all of them and the answer is the X4 Pro IMO. It has a backlight, which is the only thing I really missed on the others.
It's funny that X3 is a successor of X4. Only downside is that X4 has a USB-C port and X3 doesn't
What about the back light? Are they otherwise identical?
X3 isn't backlit, but the battery lasts 7 days. So, it's pretty good for me
I bought an x4 a month or so ago, zero regrets. It sounds hyperbolic but it’s finally been the thing to actually decouple me from my phone. Whenever I’m out and about, bored, I just slide it out and pick up where I left off reading last. It’s a nicer reading experience on my kobo but the portability and.. frankly charm just can’t be beat.
This is a fantastic idea!
Outstanding! This is so...correct.
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