""" カレンダー JPEG ジェネレーター ================================ 出力: YYYY_MM.jpg (1月1ファイル) サイズ: 400×300px (4:3)、白背景、罫線なし 色仕様: 日曜・祝日 → 赤 #FF0000 土曜 → 金 #FFD700 平日 → 黒 #000000 背景 → 白 #FFFFFF 列順: 日・月・火・水・木・金・土 必要ライブラリ (pip でインストール): pip install reportlab pdf2image Pillow ※ pdf2image は poppler-utils も必要 - Ubuntu/Debian: sudo apt install poppler-utils - macOS: brew install poppler - Windows: https://github.com/oschwartz10612/poppler-windows """ import calendar import os from io import BytesIO from reportlab.pdfgen import canvas as rl_canvas from reportlab.pdfbase import pdfmetrics from reportlab.pdfbase.ttfonts import TTFont from reportlab.lib.colors import HexColor from pdf2image import convert_from_bytes # =========================================================== # ★ フォントパスを環境に合わせて変更してください # Windows 例: "C:/Windows/Fonts/msgothic.ttc" # macOS 例: "/System/Library/Fonts/ヒラギノ角ゴシック W3.ttc" # Linux 例: "/usr/share/fonts/opentype/ipafont-gothic/ipag.ttf" # =========================================================== FONT_PATH = "/usr/share/fonts/opentype/ipafont-gothic/ipag.ttf" # =========================================================== # 出力設定 # =========================================================== OUTPUT_DIR = "./output" # 保存先フォルダ JPEG_DPI = 150 # DPI (大きいほど高画質・ファイルサイズ増) JPEG_QUALITY = 95 # JPEG品質 (1〜95) PAGE_W_PT = 400 # ページ幅 (pt ≒ px) PAGE_H_PT = 300 # ページ高さ (pt ≒ px) MARGIN_PT = 14 # 余白 # =========================================================== # 色 # =========================================================== COLOR_BG = HexColor("#FFFFFF") COLOR_TEXT = HexColor("#000000") COLOR_RED = HexColor("#FF0000") COLOR_GOLD = HexColor("#FFD700") # =========================================================== # 祝日 (2026年) ── 必要に応じて追加・修正してください # =========================================================== JP_HOLIDAYS = { (2026, 1, 1), (2026, 1, 12), (2026, 2, 11), (2026, 2, 23), (2026, 3, 20), (2026, 4, 29), (2026, 5, 3), (2026, 5, 4), (2026, 5, 5), (2026, 5, 6), (2026, 7, 20), (2026, 8, 11), (2026, 9, 21), (2026, 9, 23), (2026, 10, 12), (2026, 11, 3), (2026, 11, 23), } MONTH_NAMES_JP = { 1:"1月", 2:"2月", 3:"3月", 4:"4月", 5:"5月", 6:"6月", 7:"7月", 8:"8月", 9:"9月", 10:"10月", 11:"11月", 12:"12月", } DOW_NAMES = ["日", "月", "火", "水", "木", "金", "土"] # ----------------------------------------------------------- # 内部ユーティリティ # ----------------------------------------------------------- def _day_color(year, month, day, col_idx): """col_idx: 0=日曜 … 6=土曜""" if (year, month, day) in JP_HOLIDAYS or col_idx == 0: return COLOR_RED if col_idx == 6: return COLOR_GOLD return COLOR_TEXT def _sun_first_weeks(year, month): """日曜始まりの週リストを返す (空き=0)""" return calendar.Calendar(firstweekday=6).monthdayscalendar(year, month) def _draw_month(c, year, month, x0, y0, w, h): """ReportLab canvas に1か月分を描画する""" header_h = h * 0.15 dow_h = h * 0.11 body_h = h - header_h - dow_h col_w = w / 7.0 weeks = _sun_first_weeks(year, month) row_h = body_h / len(weeks) # ---- タイトル ---- c.setFont("CalFont", header_h * 0.52) c.setFillColor(COLOR_TEXT) c.drawCentredString( x0 + w / 2, y0 + h - header_h * 0.68, f"{year}年　{MONTH_NAMES_JP[month]}" ) # ---- 曜日行 ---- dow_top = y0 + h - header_h c.setFont("CalFont", dow_h * 0.52) for col, name in enumerate(DOW_NAMES): cx = x0 + col_w * col + col_w / 2 cy = dow_top - dow_h * 0.75 c.setFillColor(COLOR_RED if col == 0 else COLOR_GOLD if col == 6 else COLOR_TEXT) c.drawCentredString(cx, cy, name) # ---- 日付グリッド ---- grid_top = dow_top - dow_h c.setFont("CalFont", row_h * 0.50) for row_idx, week in enumerate(weeks): for col_idx, day in enumerate(week): if day == 0: continue cx = x0 + col_w * col_idx + col_w / 2 cy = grid_top - row_h * row_idx - row_h * 0.65 c.setFillColor(_day_color(year, month, day, col_idx)) c.drawCentredString(cx, cy, str(day)) def _render_pdf_bytes(year, month): """1か月分の PDF をメモリ上に生成して bytes で返す""" buf = BytesIO() c = rl_canvas.Canvas(buf, pagesize=(PAGE_W_PT, PAGE_H_PT)) c.setFillColor(COLOR_BG) c.rect(0, 0, PAGE_W_PT, PAGE_H_PT, fill=1, stroke=0) _draw_month(c, year, month, MARGIN_PT, MARGIN_PT, PAGE_W_PT - MARGIN_PT * 2, PAGE_H_PT - MARGIN_PT * 2) c.save() return buf.getvalue() # ----------------------------------------------------------- # 公開 API # ----------------------------------------------------------- def generate_calendar_jpeg(months, output_dir=OUTPUT_DIR, dpi=JPEG_DPI, quality=JPEG_QUALITY): """ 指定した月のカレンダー JPEG を生成する。 Parameters ---------- months : list of (int, int) [(year, month), ...] 例: [(2026, 5), (2026, 6)] output_dir : str 保存先ディレクトリ (存在しなければ自動作成) dpi : int 出力解像度 quality : int JPEG 品質 (1〜95) Returns ------- list of str 生成したファイルパスの一覧 """ # フォント登録 (重複登録はスキップ) if "CalFont" not in pdfmetrics.getRegisteredFontNames(): pdfmetrics.registerFont(TTFont("CalFont", FONT_PATH)) os.makedirs(output_dir, exist_ok=True) saved = [] for year, month in months: pdf_bytes = _render_pdf_bytes(year, month) images = convert_from_bytes(pdf_bytes, dpi=dpi) img = images[0].convert("RGB") filename = f"{year}_{month:02d}.jpg" filepath = os.path.join(output_dir, filename) img.save(filepath, "JPEG", quality=quality) print(f" 保存: {filepath} ({img.width}×{img.height}px)") saved.append(filepath) print(f"✅ {len(saved)}枚 生成完了") return saved # ----------------------------------------------------------- # エントリポイント # ----------------------------------------------------------- if __name__ == "__main__": # ↓ 出力したい月をここに追加するだけ months_to_generate = [ (2026, 5), (2026, 6), # (2026, 7), # (2026, 8), ] generate_calendar_jpeg(months_to_generate)