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Text copy from PDF produces empty output despite visible Tibetan glyphs #20

Description

@10zYmon

Tibetan text in PDF partially non-selectable

File: IE4CZ30842/to_convert/VE1ER1994/0002_Tendel Toepa main indesign file 2013.pdf


Description

Tibetan glyphs correctly in PDF viewers, but selecting and copying any text returns an empty string. A prior attempt to fix this using pdf-cmap-fix-gshape did not resolve the issue.

Problems stemming from how InDesign/Ghostscript handled the Monlam Unicode Tibetan font:
Problem 1 — No ToUnicode CMap on any Tibetan font (critical)
Problem 2 — 504 unique font subsets for one typeface (structural)
Problem 3 — Misleading Japanese CMap name in font identifiers


Sample

Issue pdf file :
0002_Tendel Toepa main indesign file 2013.pdf

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