From 19c4367fb8622e9b51fbb9c6c2a54a9531a48405 Mon Sep 17 00:00:00 2001
From: 134 <a134@134deMacBook-Pro.local>
Date: Sat, 4 Jul 2026 19:05:52 +0800
Subject: [PATCH] fix: clip protected person pixels without dropping scale
 target

---
 app/api/canvas/local-edit/route.ts | 32 +++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index 409144035..ef5a0c359 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -1700,15 +1700,29 @@ function filterScaleAdjustStructureComponents(params: {
               : false;
       const protectedPersonOverlapRatio =
         protectedPersonOverlap / Math.max(1, area);
+      const shouldClipProtectedPersonSide =
+        Boolean(protectedPersonMask) &&
+        protectedPersonOverlap > 0 &&
+        touchesProtectedPersonSide;
+      const isProtectedPersonPixel = (pixelX: number, pixelY: number) => {
+        const pixelIndex = pixelY * width + pixelX;
+        if (protectedPersonMask?.[pixelIndex]) return true;
+        if (!shouldClipProtectedPersonSide) return false;
+        if (protectedPersonSide === "right") return pixelX >= width * 0.78;
+        if (protectedPersonSide === "left") return pixelX <= width * 0.22;
+        if (protectedPersonSide === "auto") {
+          return (
+            (touchesRight && pixelX >= width * 0.82) ||
+            (touchesLeft && pixelX <= width * 0.18)
+          );
+        }
+        return false;
+      };
       const likelyProtectedPersonComponent =
         Boolean(protectedPersonMask) &&
         protectedPersonOverlap > 0 &&
-        (protectedPersonOverlapRatio >= 0.012 ||
-          (touchesProtectedPersonSide &&
-            protectedPersonOverlap >= Math.max(6, area * 0.002))) &&
-        (touchesProtectedPersonSide ||
-          componentHeight >= height * 0.16 ||
-          componentWidth >= width * 0.16);
+        touchesProtectedPersonSide &&
+        protectedPersonOverlapRatio >= 0.32;
       const broadTopBackground =
         touchesTop &&
         centerYRatio <= 0.45 &&
@@ -1740,12 +1754,16 @@ function filterScaleAdjustStructureComponents(params: {
         if (fillSurfaceComponent) {
           for (let fillY = minY; fillY <= maxY; fillY += 1) {
             for (let fillX = minX; fillX <= maxX; fillX += 1) {
+              if (isProtectedPersonPixel(fillX, fillY)) continue;
               output[fillY * width + fillX] = 255;
             }
           }
         } else {
           for (let index = 0; index < queueX.length; index += 1) {
-            output[(queueY[index] || 0) * width + (queueX[index] || 0)] = 255;
+            const pixelX = queueX[index] || 0;
+            const pixelY = queueY[index] || 0;
+            if (isProtectedPersonPixel(pixelX, pixelY)) continue;
+            output[pixelY * width + pixelX] = 255;
           }
         }
       }