Fontforge extract font from pdf pdf#
Fontforge extract font from pdf code#

I know it's incorrect because it says the first glyph ('&') horizontally intersects the second ('˙'), which you can see isn't true when you view the PDF in a PDF reader.

Fontforge extract font from pdf code#

What is the 'ground truth' bounding box positioning for these 10 glyphs, in device space? My current code produces the following, but it's incorrect.

This example PDF I've created has 10 glyphs.

There are many moving parts here, and I've found it's quite hard to debug. that might be considered 'outside' the bounding box in other applications. Each glyph is drawn independently.Īlso, note that I'm defining bounding box as 'the smallest box that can contain all the drawn parts of the glyph.' There's no need to ignore the ascenders/descenders/etc. As such, one nice constraint is that I can assume glyphs aren't drawn together in the same Tj/TJ operator. My specific application is extracting the musical semantics from a vector PDF of sheet music. For my purposes, I need more precise positioning. I realize the PDF FontDescriptor includes a rough bounding box for each embedded font, but that's a composite of all glyphs in the font - i.e., the smallest bounding box that fits all glyphs in the font. This involves keeping track of the CTM, drawing/positioning PDF instructions, etc., but also calculating the boundaries of every specific glyph in 'glyph space' (using the information from the GLYF tables in the embedded fonts). So, if the PDF file that you are trying to extract from does not contain the letter 'P', then that letter will not show up in FontForge.' (You could see an example of this in the image above, the PDF file the font was extracted from did not contain glyphs for all the letters in the english alphabet).I'm trying to calculate the exact bounding box of every text glyph in a vector PDF. Quote from the article: 'Beware though, sometimes when a font is embedded into a PDF it will only contain characters used. Then you would have to edit the Font Info, and save the font as a font file (usally TrueType is best). This will remove all non-used glyphs in the font. Then you'll just need to compact the font using the 'Encoding' menu and selecting 'Compact'.

When you have selected your PDF file, a 'Pick a font' dialogbox will open where you could select wich font to open. We read: Basically you just need to select 'Extract from PDF' in the filter section of the 'Open Font' dialogbox used when opening files. TYPE DESIGN INFORMATION PAGE last updated on Using FontForge to extract fonts from a PDF file