Create render_images.py

render_images.py

@@ -0,0 +1,88 @@
+import xml.etree.ElementTree as ET
+import cairosvg
+from pathlib import Path
+
+
+def batch_render_kanji(xml_file_path, output_dir="kanji_images_rendered", size=256, bg_color="white"):
+    """
+    Parses a full KanjiVG XML file and renders every kanji to a PNG image
+    with a specified background color.
+
+    Args:
+        xml_file_path (str or Path): Path to the kanjivg XML file.
+        output_dir (str or Path): Directory where the PNG images will be saved.
+        size (int): The width and height of the output PNGs in pixels.
+        bg_color (str): The background color for the image (e.g., 'white', '#FFFFFF').
+                        Set to None for a transparent background.
+    """
+    output_path = Path(output_dir)
+    output_path.mkdir(exist_ok=True)
+    print(f"Output directory set to: {output_path.resolve()}")
+    if bg_color:
+        print(f"Background color set to: '{bg_color}'")
+    else:
+        print("Background is set to transparent.")
+
+    try:
+        print(f"Loading and parsing XML file: {xml_file_path}...")
+        tree = ET.parse(xml_file_path)
+        root = tree.getroot()
+    except ET.ParseError as e:
+        print(f"Fatal Error: Could not parse XML file. Details: {e}")
+        return
+    except FileNotFoundError:
+        print(f"Fatal Error: The file was not found at '{xml_file_path}'")
+        return
+
+    kanji_elements = root.findall('.//kanji')
+    total_kanji = len(kanji_elements)
+    print(f"Found {total_kanji} kanji elements to render.")
+
+    if total_kanji == 0:
+        print("No kanji elements were found. Please check the XML file content.")
+        return
+
+    for i, kanji_element in enumerate(kanji_elements):
+        kanji_id = kanji_element.attrib.get('id', f'unknown_{i}')
+        hex_codepoint = kanji_id.split('_')[-1]
+        
+        g_element = kanji_element.find('{http://kanjivg.tagaini.net}g') or kanji_element.find('g')
+        
+        if g_element is None:
+            print(f"[{i+1}/{total_kanji}] Skipping {kanji_id}: No drawable <g> element found.")
+            continue
+
+        g_string = ET.tostring(g_element, encoding='unicode')
+
+        svg_document = f'''<?xml version="1.0" encoding="UTF-8"?>
+<svg width="{size}px" height="{size}px" viewBox="0 0 109 109" version="1.1" xmlns="http://www.w3.org/2000/svg">
+  <g fill="none" stroke="#000000" stroke-width="3" stroke-linecap="round" stroke-linejoin="round">
+    {g_string}
+  </g>
+</svg>'''
+
+        output_filename = output_path / f"U+{hex_codepoint}.png"
+
+        try:
+            # --- MODIFICATION HERE ---
+            # Added the 'background_color' parameter to the rendering function.
+            cairosvg.svg2png(
+                bytestring=svg_document.encode('utf-8'),
+                write_to=str(output_filename),
+                background_color=bg_color
+            )
+            if (i + 1) % 100 == 0 or i == total_kanji - 1:
+                 print(f"[{i+1}/{total_kanji}] Successfully rendered: {output_filename.name}")
+        except Exception as e:
+            print(f"[{i+1}/{total_kanji}] Failed to render {kanji_id}: {e}")
+
+    print("\nBatch rendering complete.")
+
+
+if __name__ == "__main__":
+    image_directory = "kanji_images"
+    kanjivg_xml_path = "kanjivg-20220427.xml.xml"
+    image_size = 1024 
+    bg_color = "white" 
+
+    batch_render_kanji(kanjivg_xml_path, image_directory, image_size, bg_color)