From e0adb40880f50b595db4fc83e31b0dc50d662b2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexis=20M=C3=A9taireau?= <alexis@notmyidea.org>
Date: Fri, 4 Apr 2025 13:34:27 +0200
Subject: [PATCH] Place multiple labels per page

---
 main.rs | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/main.rs b/main.rs
index 9fa119f..7d38122 100644
--- a/main.rs
+++ b/main.rs
@@ -18,7 +18,8 @@ const A4_HEIGHT: f32 = 297.0;
 // Configuration for the label
 const DPI: f32 = 300.0;
 const MM_TO_PX: f32 = DPI / 25.4;
-const LABEL_WIDTH: f32 = 220.0 * MM_TO_PX;
+const PX_TO_PT: f32 = 0.75;
+const LABEL_WIDTH: f32 = 210.0 * MM_TO_PX;
 const LABEL_HEIGHT: f32 = 16.0 * MM_TO_PX;
 
 // Elements positionning
@@ -181,7 +182,7 @@ fn combine_labels(
     // Group labels by page
     for chunk in labels.chunks(labels_per_page) {
         let mut page_contents = Vec::new();
-        let mut y_position = A4_HEIGHT - LABEL_HEIGHT;
+        let mut y_position = 0.0;
 
         for label in chunk {
             let pixels = label.clone().into_raw();
@@ -197,13 +198,17 @@ fn combine_labels(
             page_contents.push(Op::UseXobject {
                 id: image_id,
                 transform: XObjectTransform {
-                    translate_y: Some(printpdf::Pt(y_position)),
-                    ..Default::default()
+                    translate_x: None,
+                    translate_y: Some(printpdf::Px(y_position as usize).into_pt(DPI)),
+                    rotate: None,
+                    scale_x: None,
+                    scale_y: None,
+                    dpi: None,
                 },
             });
 
             // Move y position up for next label
-            y_position -= LABEL_HEIGHT;
+            y_position += LABEL_HEIGHT;
         }
 
         // Create page and add to pages list