PDF Render-Compatibility Sets

PDF files exercising font and encoding edge cases that cause cross-renderer visual differences. Open them in multiple viewers to find where rendering diverges.

multi-encoding.pdf · CID · OPENTYPE · TYPE 3

01WHAT'S IN THE PACK

render-compat-pack.zip contains:

  • cid-font.pdfCIDFontType2 with a large character collection (Adobe-Identity-0). Tests: CID-to-GID mapping, font subsetting, fallback behavior.
  • opentype.pdfEmbedded OpenType font with ligatures, contextual alternates, and CFF outlines. Tests: OpenType feature support, CFF rasterization.
  • type3.pdfType 3 font with custom glyph programs (arbitrary drawing operators). Tests: Type 3 glyph rendering, color-in-glyph support.
  • multi-encoding.pdfSame text rendered in WinAnsi, MacRoman, and a custom encoding. Tests: encoding-table lookup, ToUnicode CMap correctness.
  • README.mdPer-file: which font feature is exercised, known renderer differences observed during creation.

02TARGET RENDERERS

Open each file in these viewers and compare:

pdf.js (Mozilla) Chrome / Edge (Skia/PDFium) Firefox (pdf.js) Adobe Acrobat Reader Evince / Poppler (Linux)

The README documents known differences we observed. Your results may vary by version.

03DOWNLOAD

Download render-compat-pack.zip Generate a PDF with Specific Properties → STATIC CDN · NO GENERATION DELAY · NO ACCOUNT

CID-to-GID mapping errors, missing OpenType ligature support, Type 3 glyph rasterization differences, and encoding-table lookup failures. The README documents specific known differences per file.

No. All fonts are embedded in the PDF files. Differences arise from how each renderer interprets the embedded font data, not from locally installed fonts.

→ All CollectionsBrowse every purpose-classified set. 5 SETS → GeneratorCustom properties on demand. TOOL → Parser StressStructural robustness testing. SET 03