Update app.py

app.py

@@ -7,25 +7,29 @@ class PDFTransformer:
         self.doc = fitz.open(pdf_path)
 
     def scale_content_to_fit(self, width, height):
-        # Resize each page's mediabox and cropbox for proportional scaling
         for page in self.doc:
             rect = page.rect
             original_width, original_height = rect.width, rect.height
 
-            # Calculate the scaling factor to fit within the target dimensions while keeping aspect ratio
+            # Determine the scaling factor to maintain aspect ratio
             scale_factor = min(width / original_width, height / original_height)
-            
-            # New dimensions based on scale factor
-            new_width = original_width * scale_factor
-            new_height = original_height * scale_factor
-            
-            # Centering offsets to keep content centered on the new page
-            x_offset = (width - new_width) / 2
-            y_offset = (height - new_height) / 2
 
-            # Set new page dimensions and adjust content placement
-            page.set_mediabox(fitz.Rect(0, 0, width, height))
-            page.set_cropbox(fitz.Rect(x_offset, y_offset, x_offset + new_width, y_offset + new_height))
+            # Calculate scaled width and height based on scale factor
+            scaled_width = original_width * scale_factor
+            scaled_height = original_height * scale_factor
+
+            # Center the content on the new page dimensions
+            x_offset = (width - scaled_width) / 2
+            y_offset = (height - scaled_height) / 2
+
+            # Create a transformation matrix
+            matrix = fitz.Matrix(scale_factor, scale_factor)
+            
+            # Apply transformation to content and reposition
+            page.set_mediabox(fitz.Rect(0, 0, width, height))  # Set page to target dimensions
+            page.set_cropbox(fitz.Rect(0, 0, width, height))    # Ensure cropbox matches the new size
+            page.apply_transform(matrix)                        # Scale the content
+            page.set_cropbox(fitz.Rect(x_offset, y_offset, x_offset + scaled_width, y_offset + scaled_height))
 
     def save_to_pdf(self, output_path):
         self.doc.save(output_path, garbage=4, deflate=True, clean=True)