Update app.py

app.py

@@ -4,10 +4,25 @@ from pdf2image import convert_from_path
 from PIL import Image
 import img2pdf
 import os
+import shutil
+import PyPDF2
+
+def get_pdf_page_sizes(pdf_path):
+    sizes = []
+    with open(pdf_path, "rb") as f:
+        reader = PyPDF2.PdfReader(f)
+        for i, page in enumerate(reader.pages):
+            mediabox = page.mediabox
+            width_pt = float(mediabox.width)
+            height_pt = float(mediabox.height)
+            # 1ポイント = 1/72インチ
+            width_mm = width_pt * 25.4 / 72
+            height_mm = height_pt * 25.4 / 72
+            sizes.append(f"Page {i+1}: {width_pt:.1f}pt x {height_pt:.1f}pt  (~{width_mm:.1f}mm x {height_mm:.1f}mm)")
+    return "\n".join(sizes)
 
-def downscale_pdf(pdf_file, dpi=150, max_width=1500):
-    import shutil
 
+def downscale_pdf(pdf_file, dpi=150, max_width=1500):
     with tempfile.TemporaryDirectory() as tmpdir:
         # ステップ 1: PDF → 画像
         images = convert_from_path(pdf_file.name, dpi=dpi, output_folder=tmpdir)
@@ -39,7 +54,11 @@ def downscale_pdf(pdf_file, dpi=150, max_width=1500):
             shutil.copyfileobj(src, result_file)
         result_file.close()
 
-    return result_file.name
+    # サイズ情報を取得
+    page_sizes_info = get_pdf_page_sizes(result_file.name)
+
+    return result_file.name, page_sizes_info
+
 
 with gr.Blocks() as demo:
     gr.Markdown("# PDF 解像度ダウンサイザー\nPDFのページ画像を縮小して容量を減らします。")
@@ -52,11 +71,12 @@ with gr.Blocks() as demo:
 
         with gr.Column():
             pdf_output = gr.File(label="出力PDF")
+            size_output = gr.Textbox(label="ページサイズ情報", lines=10)
 
     convert_button.click(
         fn=downscale_pdf,
         inputs=[pdf_input, dpi_input, width_input],
-        outputs=pdf_output
+        outputs=[pdf_output, size_output]
     )
 
 demo.launch()