added DST, EXP, JEF, VP3

rustitch/src/resolve.rs

@@ -0,0 +1,75 @@
+use crate::error::Error;
+use crate::types::{BoundingBox, ResolvedDesign, StitchCommand, StitchSegment};
+
+/// Convert parsed stitch commands into renderable segments with absolute coordinates.
+pub fn resolve(
+    commands: &[StitchCommand],
+    colors: Vec<(u8, u8, u8)>,
+) -> Result<ResolvedDesign, Error> {
+    let mut segments = Vec::new();
+    let mut x: f32 = 0.0;
+    let mut y: f32 = 0.0;
+    let mut color_idx: usize = 0;
+    let mut pen_down = true;
+
+    for cmd in commands {
+        match cmd {
+            StitchCommand::Stitch { dx, dy } => {
+                let nx = x + *dx as f32;
+                let ny = y + *dy as f32;
+                if pen_down {
+                    segments.push(StitchSegment {
+                        x0: x,
+                        y0: y,
+                        x1: nx,
+                        y1: ny,
+                        color_index: color_idx,
+                    });
+                }
+                x = nx;
+                y = ny;
+                pen_down = true;
+            }
+            StitchCommand::Jump { dx, dy } => {
+                x += *dx as f32;
+                y += *dy as f32;
+                pen_down = false;
+            }
+            StitchCommand::Trim => {
+                pen_down = false;
+            }
+            StitchCommand::ColorChange => {
+                color_idx += 1;
+                pen_down = false;
+            }
+            StitchCommand::End => break,
+        }
+    }
+
+    if segments.is_empty() {
+        return Err(Error::EmptyDesign);
+    }
+
+    let mut min_x = f32::MAX;
+    let mut max_x = f32::MIN;
+    let mut min_y = f32::MAX;
+    let mut max_y = f32::MIN;
+
+    for seg in &segments {
+        min_x = min_x.min(seg.x0).min(seg.x1);
+        max_x = max_x.max(seg.x0).max(seg.x1);
+        min_y = min_y.min(seg.y0).min(seg.y1);
+        max_y = max_y.max(seg.y0).max(seg.y1);
+    }
+
+    Ok(ResolvedDesign {
+        segments,
+        colors,
+        bounds: BoundingBox {
+            min_x,
+            max_x,
+            min_y,
+            max_y,
+        },
+    })
+}