Hello, In what seems like a never ending list of tasks for the PoDoFo 1.0 release, I recently checked-in[1] a rewritten support for querying the "Adobe Glyph List"[2][3], both for text extraction and glyph selection. While text extraction regards fetching the semantic Unicode text, glyph selection is more related to rendering and involves determining the correct index of the glyph to render in the font program. In the so called "simple" fonts (/Type1, /TrueType and /Type3 fonts), this can be not simple at all, and in the case of TrueType fonts the difficulty to write an implementation with the current abstractions in PoDoFo can be "legendary", due to the specification not really providing smart general rules, but basically dictating the internal behavior of Acrobat products, which probably stratified features and compatibility hacks in a incoerent way before the introduction of CID fonts.
It is interesting to observe that the handling of "Adobe Glyph List" in PoDoFo was quite...wrong: the AGL resources in the 0.9.x code[4] are not really the lists supplied by Adobe, and the correct way ligatures are handled in the specification is very different. Only Dominik knows at this point: maybe he copied a wrong implementation from some other project, but either way the specification was probably bypassed and a hacky implementation that seemed to work emerged. I can't really blame anyone for this: it's really work that requires full commitment for days/weeks. Concluding, as said glyph selection is related to rendering but this does not mean that I'm currently using PoDoFo for rendering, as I need the feature in another PDF processing task as part of my duties. Sadly this means that the unit tests and the fixture are not public, similarly to everything related to text extraction, but the message here is that having such features is a demonstration of the maturity of PoDoFo, which could already be used to render basic content (text and several images) quite trivially. As I should be done with PoDoFo features for now, I will resume preparations for the 1.0 release with remaining (trivial) tasks and bug fixing. Stay tuned. Francesco [1] https://github.com/podofo/podofo/commit/e6e22157e3ffe8bbe18541f485009545bd415c48 [2] https://github.com/adobe-type-tools/agl-aglfn/ [3] https://github.com/adobe-type-tools/agl-specification [4] https://github.com/podofo/podofo/blob/0.9.x/src/podofo/doc/PdfDifferenceEncoding.cpp
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