--- nono/wx/fontmanager.cpp	2026/04/29 17:05:16	1.1.1.3
+++ nono/wx/fontmanager.cpp	2026/04/29 17:05:27	1.1.1.5
@@ -109,7 +109,7 @@ FontManager::AsciiGlyph(uint8 code, uint
 	const std::vector<uint8> *glyph;
 
 	// ボールドかどうかでテーブルが別
-	if ((attr & TA::Em)) {
+	if ((attr & TA::Bold)) {
 		glyph = &bold_glyph;
 	} else {
 		glyph = &ascii_glyph;
@@ -191,18 +191,29 @@ FontManager::KanjiGlyph(uint16 sjiscode,
 		PANIC("corrupted fontid=%d", (int)fontid);
 	}
 
-	int bytes = (((font_width * 2) + 7) / 8) * font_height;
-	std::vector<uint8> buf(bytes);
+	int stride = ((font_width * 2) + 7) / 8;
+	int bytes = stride * font_height;
+	std::vector<uint8> data(bytes);
 
-	memcpy(&buf[0], base + code * bytes, bytes);
-
-	if (attr == TA::Em) {
-		for (int i = 0; i < bytes; i++) {
-			buf[i] |= buf[i] >> 1;
+	if (__predict_true((attr & TA::Bold) == 0)) {
+		memcpy(&data[0], base + code * bytes, bytes);
+	} else {
+		// ボールドなら1ラインずつ取り出して重ね合わせる
+		const uint8 *s = base + code * bytes;
+		int i = 0;
+		for (int y = 0; y < font_height; y++) {
+			uint64 buf = 0;
+			for (int x = 0; x < stride; x++) {
+				buf = (buf << 8) | *s++;
+			}
+			buf |= buf >> 1;
+			for (int x = stride - 1; x >= 0; x--) {
+				data[i++] = (buf >> (x * 8)) & 0xff;
+			}
 		}
 	}
 
-	return buf;
+	return data;
 }
 
 // フォント種別一覧