Update app.py

app.py

@@ -5,7 +5,7 @@ import img2pdf
 import tempfile
 import os
 
-def downscale_pdf(pdf_file, max_width=3000, dpi=150):
+def downscale_pdf(pdf_file, max_width=3000, target_dpi=150):
     with tempfile.TemporaryDirectory() as tmpdir:
         # ステップ 1: PDF → 画像
         images = convert_from_path(pdf_file.name, dpi=300, fmt='jpeg', output_folder=tmpdir)
@@ -13,8 +13,7 @@ def downscale_pdf(pdf_file, max_width=3000, dpi=150):
         downscaled_images = []
         for i, img in enumerate(images):
             w, h = img.size
-            total_px = w * h
-            print(f"Original Page {i+1}: {w}x{h} = {total_px}")
+            print(f"Original Page {i+1}: {w}x{h} = {w * h} px")
 
             # サイズ制限
             if w > max_width:
@@ -22,16 +21,20 @@ def downscale_pdf(pdf_file, max_width=3000, dpi=150):
                 new_w = int(w * ratio)
                 new_h = int(h * ratio)
                 img = img.resize((new_w, new_h), Image.LANCZOS)
-                print(f"Downscaled Page {i+1}: {new_w}x{new_h} = {new_w * new_h}")
-            
+                print(f"Downscaled Page {i+1}: {new_w}x{new_h} = {new_w * new_h} px")
+            else:
+                new_w, new_h = w, h
+                print(f"Page {i+1}: サイズ変更なし")
+
             tmp_image_path = os.path.join(tmpdir, f"page_{i+1}.jpg")
-            img.save(tmp_image_path, "JPEG", quality=95)
+            img.save(tmp_image_path, "JPEG", quality=90)
             downscaled_images.append(tmp_image_path)
 
         # ステップ 2: 画像 → PDF
         output_pdf_path = os.path.join(tmpdir, "downscaled.pdf")
         with open(output_pdf_path, "wb") as f:
-            f.write(img2pdf.convert(downscaled_images))
+            # ✅ DPIを指定してPDF内の実寸を制御
+            f.write(img2pdf.convert(downscaled_images, dpi=target_dpi))
 
         # ✅ Gradio返却用に一時ファイルにコピー
         final_pdf_file = tempfile.NamedTemporaryFile(delete=False, suffix=".pdf")