fix(codes): encoding progress follows the work

The QR percentage counted phases and the display froze at 90 % once
encoding ended, so the first opening sat at 90 % while the slow stages
ran. Each 2D symbology now weights its phases by measured cost,
interpolates inside the long ones, and the display splits encode,
pack and runs; a cached code counts its runs from 0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 20 insertions, 1 deletions

diff --git a/source/codes/Pdf417.mc b/source/codes/Pdf417.mc
index a294aa7..c905a2d 100644
--- a/source/codes/Pdf417.mc
+++ b/source/codes/Pdf417.mc
@@ -35,6 +35,8 @@ module Pdf417 {
     const NUMERIC_LATCH = 902;
     const ROW_HEIGHT = 3;
     const QUIET = 2;
+    // Cumulative percent at the end of each phase 0-2 (see Pdf417Job.percent).
+    const PHASE_ENDS = [40, 70, 100];
     const MAX_CODEWORDS = 928;
 
     const KIND_TEXT = 0;
@@ -383,8 +385,25 @@ module Pdf417 {
             level = ecLevel;
         }
 
+        // Progress 0-100: the share of each phase (simulator timings), and
+        // inside the Reed-Solomon and row phases how far they have got.
         function percent() as Number {
-            return _phase == 1 && _words.size() > 0 ? 20 + 60 * _at / _words.size() : _phase * 30;
+            var done = 0;
+            var total = 0;
+            if (_phase == 1) { // data codewords done
+                done = _at;
+                total = _words.size();
+            } else if (_phase == 2) { // rows built
+                done = _at;
+                total = rows;
+            }
+            return Codes.phased(PHASE_ENDS, _phase, done, total);
+        }
+
+        // Packing and runs: about 62 / 7 / 31 % of a whole display job (the
+        // wide matrices make the runs a third).
+        function stageEnds() as Array<Number> {
+            return [62, 69];
         }
 
         function matrix() as Codes.Matrix? {