PDF how define only one character front bold

Question

I develop in php function that create simple pdf. I have text:

Lorem ipsum dolor sit amet.

But I want what character i always be bold.

How can I do this? (maybe in /Differences).

--edit--

%PDF-1.4
(..skipping...)
/F1 9 Tf
0 g 
BT
157 830 Td
(Lorem ) Tj
ET
/F2 9 Tf
0 g
BT
187 830 Td
(i) Tj
ET
/F1 9 Tf
0 g
BT
190 830 Td
(psum) Tj
ET
(..skipping...)
8 0 obj 
<</Type /Font /Encoding /WinAnsiEncoding /Subtype /Type1 /BaseFont /Helvetica >>
endobj
9 0 obj 
<</Type /Font /Encoding /WinAnsiEncoding /Subtype /Type1 /BaseFont /Helvetica-Bold >>
endobj

Hello! Can you please add some code to your question? We can not guess how you're generating the pdf file. — ventiseis, Mar 24 '16 at 08:34
Your guess at `/Differences` suggests you should take another good look at the specifications. `/Differences` is for character encodings only. — Jongware, Mar 24 '16 at 11:23

score 1 · Accepted Answer · answered Mar 24 '16 at 10:16

AFAIK the way you do it (switch between two fonts, regular and bold) is the only way. Except that you don't need to create new text block for each piece of text, just change the font in the current text block as needed:

BT
 0 g 
 /F1 9 Tf
 157 830 Td
 (Lorem ) Tj
 /F2 9 Tf
 187 830 Td
 (i) Tj
 /F1 9 Tf
 190 830 Td
 (psum) Tj
ET

The glyph's visual appearance is coded in "font program" and /Differences can't be used to reference to different font.

If the only character you ever need to show in bold is i then I would consider creating special font where the i is bold, but if you need to output text in such a styled way for any character then it is not practical...

PDF how define only one character front bold

1 Answers1