1252420 - Poor PDF font rendering with integrated Garamond

Status: RESOLVED FIXED

(Firefox :: PDF Viewer, defect, P3)

Description

[Milan Bouchet-Valat]

In the following PDF, fonts are rendered very poorly with pdf.js:
http://federation.ens.fr/ydepot/actua/JOURNE/2006_11_14/BOU06VIV.pdf

On the other hand, on the same system, Evince (poppler) gives very good results. The file uses Garamond, and Evince says the font is integrated. Yet, pdf.js seems to use a different font instead.

This is on Fedora 23, Firefox 44.0.2.

Comment 1

[Jonas Jenwald [:Snuffleupagus]]

We're apparently failing to convert the fonts correctly, leading to them being rejected by OTS (OpenType Sanitiser), which is what causes the font issues.
The following is displayed in the console (using the development version of PDF.js):

> PDF f2a006f72c98f57e71334f8b286e334a [1.2 Corel PDF Engine Version 9.398 / POP90] (PDF.js: 1.4.107 [WebGL]) viewer.js:7135:7
> downloadable font: CFF: Failed validating charstring set 0 (font-family: "g_d0_f1" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: rejected by sanitizer (font-family: "g_d0_f1" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: font load failed (font-family: "g_d0_f1" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> Warning: Failed to load font ""g_d0_f1"": SyntaxError: An invalid or illegal string was specified pdf.js:368:5
> downloadable font: CFF: Failed validating charstring set 0 (font-family: "g_d0_f2" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: rejected by sanitizer (font-family: "g_d0_f2" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: font load failed (font-family: "g_d0_f2" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> Warning: Failed to load font ""g_d0_f2"": SyntaxError: An invalid or illegal string was specified pdf.js:368:5
> Warning: Failed to load font ""g_d0_f3"": SyntaxError: An invalid or illegal string was specified pdf.js:368:5
> downloadable font: CFF: Failed validating charstring set 0 (font-family: "g_d0_f3" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: rejected by sanitizer (font-family: "g_d0_f3" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: font load failed (font-family: "g_d0_f3" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> Warning: Failed to load font ""g_d0_f5"": SyntaxError: An invalid or illegal string was specified pdf.js:368:5
> downloadable font: CFF: Failed validating charstring set 0 (font-family: "g_d0_f5" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: rejected by sanitizer (font-family: "g_d0_f5" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>
> downloadable font: font load failed (font-family: "g_d0_f5" style:normal weight:normal stretch:normal src index:0) source: (invalid URI) <unknown>