# Port Upstream PRs #1311, #1322 + Verify #1329

**Date:** 2026-03-08
**Task:** Port two upstream PRs and verify alignment of a previously-ported PR that was recently merged.

## Changes Made

### PR #1311 -- Fix inter-word spacing rounding error (UNMERGED, ported as mod feature)

Replaced `getSpaceKernAdjust()` with `getSpaceAdvance()` which combines space glyph advance and flanking kern values into a single fixed-point sum before pixel snapping, fixing +/-1 px rounding drift in inter-word spacing.

**Files modified:**
- `lib/GfxRenderer/GfxRenderer.h` -- replaced declaration
- `lib/GfxRenderer/GfxRenderer.cpp` -- replaced implementation (single-snap pattern)
- `lib/Epub/Epub/ParsedText.h` -- removed `spaceWidth` parameter from 3 internal functions
- `lib/Epub/Epub/ParsedText.cpp` -- updated all 4 call sites to use `getSpaceAdvance()`

### PR #1322 -- Early exit on fillUncompressedSizes (MERGED, ported for immediate use)

Added `targetCount` variable and early `break` when all ZIP central-directory targets are matched.

**Files modified:**
- `lib/ZipFile/ZipFile.cpp` -- 5-line addition

### PR #1329 -- Reader utils refactor (MERGED, verification only)

Confirmed our existing port matches the upstream merged version (commit `cd508d2`) line-for-line. No code changes needed.

### Tracking documentation updated

- `mod/docs/upstream-sync.md` -- added #1311, #1322; updated #1329 status to MERGED
- `mod/prs/MERGED.md` -- added detailed entries for #1311 and #1322; updated #1329 author and status

## Build Result

SUCCESS -- zero compiler errors/warnings from our changes. Only pre-existing i18n translation warnings.

## Follow-up Items

- #1311: Will be dropped during next sync if/when merged upstream
- #1322: Will be dropped during next sync (already merged upstream)
- #1329: Will be dropped during next sync (already merged upstream)
- Hardware testing recommended: verify text layout rendering after spacing fix (#1311)