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Switch to persistent printer with queue

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This commit is contained in:
Joscha 2025-02-27 01:28:08 +01:00
parent 0ea4cf1d22
commit 6555e9c0bd
14 changed files with 221 additions and 76 deletions
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38
showbits-thermal-printer/src/printer.rs
View file

@ -1,5 +1,6 @@
use std::path::PathBuf;
use anyhow::Context;
use escpos::{
driver::FileDriver,
printer::Printer as EPrinter,
@ -7,8 +8,7 @@ use escpos::{
utils::{GS, PageCode, Protocol},
};
use image::{Rgba, RgbaImage};
use showbits_common::{Tree, color};
use taffy::{AvailableSpace, NodeId, Size};
use showbits_common::color;
pub struct Printer {
printer: Option<EPrinter<FileDriver>>,
@ -44,7 +44,9 @@ impl Printer {
export_path: Option<PathBuf>,
) -> anyhow::Result<Self> {
let printer = if let Some(path) = printer_path {
let driver = FileDriver::open(&path)?;
let driver = FileDriver::open(&path)
.with_context(|| format!("At {}", path.display()))
.context("Failed to open printer driver")?;
let protocol = Protocol::default();
let mut options = PrinterOptions::default();
options.page_code(Some(Self::PAGE_CODE));
@ -59,34 +61,16 @@ impl Printer {
})
}
pub fn feed(&mut self) -> anyhow::Result<()> {
if let Some(printer) = &mut self.printer {
printer.init()?.feeds(3)?.print()?;
}
Ok(())
}
pub fn print_tree<C>(
&mut self,
tree: &mut Tree<C>,
ctx: &mut C,
root: NodeId,
) -> anyhow::Result<()> {
let available = Size {
width: AvailableSpace::Definite(Self::WIDTH as f32),
// TODO Maybe MinContent? If not, why not?
height: AvailableSpace::MaxContent,
};
let image = tree.render(ctx, root, available)?;
pub fn print_image(&mut self, image: &RgbaImage) -> anyhow::Result<()> {
if let Some(path) = &self.export_path {
image.save(path)?;
image
.save(path)
.with_context(|| format!("At {}", path.display()))
.context("Failed to export to-be-printed image")?;
}
if let Some(printer) = &mut self.printer {
Self::print_image_to_printer(printer, &image)?;
Self::print_image_to_printer(printer, image).context("Failed to print image")?;
}
Ok(())