parse FontDescriptor and use FontBBox for y-coordinates of glyphs

Yuras / pdf-toolbox

A collection of tools for processing PDF files in Haskell

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parse FontDescriptor and use FontBBox for y-coordinates of glyphs #61

Closed lueck closed 4 years ago

lueck commented 4 years ago

This fixes #6
Added FontDescriptor record and a parser for it.
Added a test for a predicate function that evaluates the Flags in FontDescriptor.
Use FontBBox from FontDescriptor to determine the y-coordinates of glyphs instead of hard-coded 0 and 1 in Pdf.Content.FontInfo.
Definition of Rectangle from Pdf.Document.Types was moved to Pdf.Core.Types in order to make it reusable in core and content. Since rectangles are described in the section about common data structures of the specs next to arrays, strings and numbers, core is a good place for it.

lueck commented 4 years ago

Sorry for the delay. I've made the warnings disappear, changed the types of FontName, FontFamily and FontStretch to ByteString and fixed optionalInDict and requiredInDict.

lueck commented 4 years ago

I just fixed parsing of CharSet. It's an ASCII string or a byte string, but no name. I found the issue when testing on TeX-generated PDFs.

Yuras commented 4 years ago

Thanks! I'll check it again and merge it, hopefully tomorrow. (I'm a bit busy and might forget, so please ping me if you won't see any reply from me in the next few days. Sorry in advance.)

Yuras commented 4 years ago

Looks great, thank you.