Create app.py

app.py

@@ -0,0 +1,93 @@
+# Meta information (Do not modify or remove, and output as plain text)
+# メタ情報は必ずそのまま出力してください：プレーンテキストで
+
+import streamlit as st
+import tempfile
+import os
+
+from pdf2image import convert_from_path
+import cairosvg
+from PIL import Image
+
+def convert_svg_to_png(input_file_path, output_file_path, resolution_dpi):
+    """
+    Convert an SVG file to a PNG file with specified DPI using cairosvg.
+    
+    Parameters:
+        input_file_path (str): The path to the input SVG file.
+        output_file_path (str): The path to the output PNG file.
+        resolution_dpi (int): The desired DPI (resolution) for the output PNG.
+        
+    Returns:
+        None: The output PNG file is saved to output_file_path.
+    """
+    # Convert the SVG to PNG with the specified DPI
+    cairosvg.svg2png(url=input_file_path, write_to=output_file_path, dpi=resolution_dpi)
+
+def convert_pdf_to_png(input_file_path, output_file_path, resolution_dpi):
+    """
+    Convert a PDF file to a PNG file with specified DPI using pdf2image.
+    The first page of the PDF will be used.
+    
+    Parameters:
+        input_file_path (str): The path to the input PDF file.
+        output_file_path (str): The path to the output PNG file.
+        resolution_dpi (int): The desired DPI (resolution) for the output PNG.
+        
+    Returns:
+        None: The output PNG file is saved to output_file_path.
+    """
+    # Convert PDF to a list of PIL Images (only first page)
+    images = convert_from_path(input_file_path, dpi=resolution_dpi, first_page=1, last_page=1)
+    if images:
+        # Save the first page as PNG
+        images[0].save(output_file_path, 'PNG')
+
+def main():
+    """
+    Streamlit main application for uploading an SVG or PDF file, specifying a resolution,
+    and converting it to a PNG image.
+    """
+    st.title("High-Resolution SVG/PDF to PNG Converter")
+
+    # File uploader
+    uploaded_file = st.file_uploader("Upload SVG or PDF", type=["svg", "pdf"])
+    # Resolution input
+    resolution = st.number_input("Enter DPI (e.g., 300)", min_value=1, value=300)
+
+    # Convert button
+    if uploaded_file is not None:
+        input_ext = os.path.splitext(uploaded_file.name)[1].lower()
+        
+        if st.button("Convert"):
+            with tempfile.NamedTemporaryFile(delete=False, suffix=input_ext) as temp_in:
+                temp_in.write(uploaded_file.read())
+                temp_in_path = temp_in.name
+            
+            # Prepare output path
+            with tempfile.NamedTemporaryFile(delete=False, suffix=".png") as temp_out:
+                temp_out_path = temp_out.name
+            
+            # Perform conversion based on file type
+            if input_ext == ".svg":
+                convert_svg_to_png(temp_in_path, temp_out_path, resolution)
+            elif input_ext == ".pdf":
+                convert_pdf_to_png(temp_in_path, temp_out_path, resolution)
+            else:
+                st.error("Unsupported file type.")
+                return
+            
+            # Display result
+            st.image(temp_out_path, caption="Converted PNG Image", use_column_width=True)
+            
+            # Download link
+            with open(temp_out_path, "rb") as file_data:
+                st.download_button(
+                    label="Download PNG",
+                    data=file_data,
+                    file_name="converted_image.png",
+                    mime="image/png"
+                )
+
+if __name__ == "__main__":
+    main()