From c38003a3824d1cd98d63cd0811fc7f24adf96a4f Mon Sep 17 00:00:00 2001
From: 134 <a134@134deMacBook-Pro.local>
Date: Thu, 2 Jul 2026 22:40:04 +0800
Subject: [PATCH] fix: allow scale shrink footprint tolerance

---
 lib/canvas/generate-image.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/canvas/generate-image.ts b/lib/canvas/generate-image.ts
index 6e54cc6d0..2c0017cfd 100644
--- a/lib/canvas/generate-image.ts
+++ b/lib/canvas/generate-image.ts
@@ -186,6 +186,7 @@ const SCALE_ADJUST_FALLBACK_MASK_LUMA_GAP = 18;
 const SCALE_ADJUST_FALLBACK_INPAINT_ITERATIONS = 180;
 const SCALE_ADJUST_SHRINK_OUTSIDE_FOOTPRINT_MAX_RATIO = 0.72;
 const SCALE_ADJUST_SHRINK_MIN_SOURCE_OUTSIDE_PIXELS = 60;
+const SCALE_ADJUST_SHRINK_TARGET_FOOTPRINT_MARGIN = 0.018;
 
 const SUPPORTED_CANVAS_PROVIDER_TYPES = new Set([
   "gemini",
@@ -916,7 +917,10 @@ async function getScaleAdjustFootprintChangeStats(params: {
     });
     const targetBox = rectToPixelBox({
       height: sourceHeight,
-      region: targetRegion,
+      region: expandCanvasRegion(
+        targetRegion,
+        SCALE_ADJUST_SHRINK_TARGET_FOOTPRINT_MARGIN
+      ),
       width: sourceWidth,
     });
     const sourceMask = buildScaleAdjustFallbackSubjectMask({