tree 77ef0df93d30fc4b93f6556f1e76f1a4587fd219
parent ad52ff40390a1f37df29f0876d624809c56728a5
author Lei Zhang <thestig@chromium.org> 1632337304 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1632337304 +0000

Generate Type 42 fonts in CFX_PSRenderer.

Add basic conversion code to generate Type 42 fonts from TrueType fonts.
The font data is encoded as ASCIIHex strings with the appropriate font
dictionary entries. Since a Type 42 font can only have 256 glyphs,
TrueType fonts are split into multiple Type 42 fonts, and then combined
together into a Type 0 composite font.

This does not yet handle the case where the TrueType font data is larger
than 64K in size. The ASCIIHex strings have to be split along font table
boundaries in that case. This also does not generate CID fonts with more
advanced encoding.

Bug: chromium:1232526
Change-Id: If176bbc1338b7a7290c1c18f8b5b6e46dadda223
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/85330
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>