v0.3.1: Fix origin override broken by 8f9db32

This now needs to be converted from mm into user units

Author: sameer

Cargo.lock

@@ -1,14 +1,14 @@
 [package]
 name = "svg2gcode-cli"
-version = "0.0.13"
+version = "0.0.14"
 authors = ["Sameer Puri <crates@purisa.me>"]
 edition = "2021"
 description = "Command line interface for svg2gcode"
 repository = "https://github.com/sameer/svg2gcode"
 license = "MIT"
 
 [dependencies]
-svg2gcode = { version = "0.3.0", features = ["serde"] }
+svg2gcode = { version = "0.3.1", features = ["serde"] }
 env_logger = { version = "0", default-features = false, features = [
     "atty",
     "termcolor",

cli/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "svg2gcode"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["Sameer Puri <crates@purisa.me>"]
 edition = "2021"
 description = "Convert paths in SVG files to GCode for a pen plotter, laser engraver, or other machine."

lib/Cargo.toml

@@ -6,8 +6,11 @@ use roxmltree::{Document, Node};
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 use svgtypes::Length;
+use uom::si::f64::Length as UomLength;
+use uom::si::length::{inch, millimeter};
 
 use crate::{turtle::*, Machine};
+use self::units::CSS_DEFAULT_DPI;
 
 #[cfg(feature = "serde")]
 mod length_serde;
@@ -26,7 +29,7 @@ pub struct ConversionConfig {
     pub feedrate: f64,
     /// Dots per inch for pixels, picas, points, etc.
     pub dpi: f64,
-    /// Set the origin point for this conversion
+    /// Set the origin point in millimeters for this conversion
     #[cfg_attr(feature = "serde", serde(default = "zero_origin"))]
     pub origin: [Option<f64>; 2],
 }
@@ -119,7 +122,13 @@ pub fn svg2program<'a, 'input: 'a>(
 
         visitor.terrarium.turtle.inner.bounding_box
     };
-    let origin_transform = match config.origin {
+
+    // Convert from millimeters to user units
+    let origin = config
+        .origin
+        .map(|dim| dim.map(|d| UomLength::new::<millimeter>(d).get::<inch>() * CSS_DEFAULT_DPI));
+
+    let origin_transform = match origin {
         [None, Some(origin_y)] => {
             let bb = bounding_box_generator();
             Transform2D::translation(0., origin_y - bb.min.y)

lib/src/converter/mod.rs

@@ -6,6 +6,11 @@ use crate::Turtle;
 
 use super::ConversionVisitor;
 
+/// The DPI assumed by CSS is 96.
+///
+/// <https://www.w3.org/TR/css3-values/#absolute-lengths>
+pub const CSS_DEFAULT_DPI: f64 = 96.;
+
 /// Used to compute percentages correctly
 ///
 /// <https://www.w3.org/TR/SVG/coords.html#Units>
@@ -47,8 +52,6 @@ impl<'a, T: Turtle> ConversionVisitor<'a, T> {
         use uom::si::f64::Length;
         use uom::si::length::*;
 
-        const CSS_DEFAULT_DPI: f64 = 96.;
-
         match l.unit {
             Cm => Length::new::<centimeter>(l.number).get::<inch>() * CSS_DEFAULT_DPI,
             Mm => Length::new::<millimeter>(l.number).get::<inch>() * CSS_DEFAULT_DPI,

lib/src/converter/units.rs

@@ -34,7 +34,7 @@ impl Settings {
     ///
     /// - Settings version is [`Version::Unknown`].
     /// - There are breaking changes requiring manual intervention. In which case this does a partial update to that point.
-    pub fn try_upgrade(&mut self) -> Result<(), ()> {
+    pub fn try_upgrade(&mut self) -> Result<(), &'static str> {
         loop {
             match self.version {
                 // Compatibility for M2 by default
@@ -46,7 +46,7 @@ impl Settings {
                     self.version = Version::V5;
                 }
                 Version::V5 => break Ok(()),
-                Version::Unknown(_) => break Err(()),
+                Version::Unknown(_) => break Err("cannot upgrade unknown version"),
             }
         }
     }

lib/src/lib.rs

@@ -1,6 +1,6 @@
 [package]
 name = "svg2gcode-web"
-version = "0.0.14"
+version = "0.0.15"
 authors = ["Sameer Puri <crates@purisa.me>"]
 edition = "2021"
 description = "Convert vector graphics to g-code for pen plotters, laser engravers, and other CNC machines"
@@ -10,7 +10,7 @@ license = "MIT"
 
 [dependencies]
 wasm-bindgen = "0.2"
-svg2gcode = { version = "0.3.0", features = ["serde"] }
+svg2gcode = { version = "0.3.1", features = ["serde"] }
 roxmltree = "0.19"
 g-code = "0.4.2"
 codespan-reporting = "0.11"