Update app/core/shadowGenerator.js

app/core/shadowGenerator.js

@@ -65,16 +65,27 @@ async function generateShadow(imageBuffer, options = {}) {
         }
     }
 
-    // ---------------- Final canvas size = original size + padding ----------------
-    const canvasW = scaledW + extraLeft + extraRight;
-    const canvasH = scaledH + extraTop + extraBottom;
+    // // ---------------- Final canvas size = original size + padding ----------------
+    // const canvasW = scaledW + extraLeft + extraRight;
+    // const canvasH = scaledH + extraTop + extraBottom;
+    // const canvas = createCanvas(canvasW, canvasH);
+    // const ctx = canvas.getContext('2d');
+    // ctx.clearRect(0, 0, canvasW, canvasH);
+
+    // // ---------------- Base position ----------------
+    // const baseX = extraLeft + scaledW / 2;  // center of object
+    // const baseY = extraTop + scaledH;       // bottom of object
+    const safePad = Math.max(blur * 4, 300); // ensures enough room for long shadows
+
+    const canvasW = scaledW + safePad * 2;
+    const canvasH = scaledH + safePad * 2;
     const canvas = createCanvas(canvasW, canvasH);
     const ctx = canvas.getContext('2d');
     ctx.clearRect(0, 0, canvasW, canvasH);
 
-    // ---------------- Base position ----------------
-    const baseX = extraLeft + scaledW / 2;  // center of object
-    const baseY = extraTop + scaledH;       // bottom of object
+    // Position the image at the center-bottom area (natural shadow placement)
+    const baseX = canvasW / 2;
+    const baseY = canvasH / 2 + scaledH / 2;
 
     // ---------------- Draw shadow ----------------
     switch (type) {