Method encodeTextToBytes

src/document/forms/form-font.ts:204–225

* Encode text as bytes for use in a PdfString. * * For CID fonts with Identity-H/V encoding, the character codes in the * PDF string are CIDs. With Identity CIDToGIDMap, CID = GID, so the * character code must equal the glyph ID in the font program. * * The encoding pipeline is:

(text: string)

   * For simple fonts, produces single-byte codes.
   */
  encodeTextToBytes(text: string): Uint8Array {
    if (this.isCIDFont) {
      const codePoints = Array.from(text, char => char.codePointAt(0)!);
      const bytes = new Uint8Array(codePoints.length * 2);

      for (let i = 0; i < codePoints.length; i++) {
        // Use CIDFont mapping if available, otherwise fall back to raw code point
        const charCode = this.cidFont
          ? this.cidFont.getCharCodeForUnicode(codePoints[i])
          : codePoints[i];
        bytes[i * 2] = (charCode >> 8) & 0xff;
        bytes[i * 2 + 1] = charCode & 0xff;
      }

      return bytes;
    }

    // Simple font: single-byte encoding
    const codes = this.encodeText(text);

    return new Uint8Array(codes);
  }

  /**
   * Get width of text in points at a given font size.