Some of the Devnagri Fonts not being rendered properly

Link to PDF file: 2007-01-SB_CMYK.pdf

Configuration:

• Web browser and its version: Chrome (Version 51.0.2704.103 m) and Mozilla Firefox 47.0
• Operating system and its version: Windows 10 Pro
• PDF.js version: 1.5.355
• Is an extension: N/A

Steps to reproduce the problem:

1. Go to https://mozilla.github.io/pdf.js/web/viewer.html
2. Upload the attached PDF (2007-01-SB_CMYK.pdf) file to reproduce the error.

What is the expected behavior? I have attached correct display of the PDF file below which is showing up the text without any issue before being rendered by pdf.js

What went wrong? Some of the text are not being rendered properly. We are using SHREE-DEV Devnagri Fonts which are freely available at http://www.abstractfonts.com/search/shree-dev-0714 download for download. I have included the screenshot of the PDF file which is being rendered incorrectly.

Chrome Error Console Output:

Warning: Failed to load font "g_d0_f2": SyntaxError: Invalid font data in ArrayBuffer. pdf.js:277
Warning: Failed to load font "g_d0_f4": SyntaxError: Invalid font data in ArrayBuffer. pdf.js:277
Warning: Failed to load font "g_d0_f6": SyntaxError: Invalid font data in ArrayBuffer. pdf.js:277
Warning: Failed to load font "g_d0_f10": SyntaxError: Invalid font data in ArrayBuffer. pdf.js:277
Warning: Failed to load font "g_d0_f11": SyntaxError: Invalid font data in ArrayBuffer. pdf.js:277

[Snuffleupagus]

A more complete error message, from the Firefox console:

PDF 94eb7faf31644e43a33f25c9d8e3b37b [1.7 Adobe PDF Library 10.0.1 / Adobe InDesign CS6 (Windows)] (PDF.js: 1.5.355)viewer.js:7880:7
downloadable font: glyf: Bytecode length too high 135 (font-family: "g_d0_f2" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: glyf: Failed to parse glyph 19 (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 specifiedpdf.js:277:5
downloadable font: glyf: Bytecode length too high 166 (font-family: "g_d0_f4" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: glyf: Failed to parse glyph 36 (font-family: "g_d0_f4" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: rejected by sanitizer (font-family: "g_d0_f4" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: font load failed (font-family: "g_d0_f4" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
Warning: Failed to load font ""g_d0_f4"": SyntaxError: An invalid or illegal string was specifiedpdf.js:277:5
downloadable font: glyf: Bytecode length too high 158 (font-family: "g_d0_f6" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: glyf: Failed to parse glyph 36 (font-family: "g_d0_f6" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: rejected by sanitizer (font-family: "g_d0_f6" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: font load failed (font-family: "g_d0_f6" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
Warning: Failed to load font ""g_d0_f6"": SyntaxError: An invalid or illegal string was specifiedpdf.js:277:5
downloadable font: glyf: Bytecode length too high 123 (font-family: "g_d0_f10" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: glyf: Failed to parse glyph 20 (font-family: "g_d0_f10" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: rejected by sanitizer (font-family: "g_d0_f10" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: font load failed (font-family: "g_d0_f10" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
Warning: Failed to load font ""g_d0_f10"": SyntaxError: An invalid or illegal string was specifiedpdf.js:277:5
downloadable font: glyf: Bytecode length too high 182 (font-family: "g_d0_f11" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: glyf: Failed to parse glyph 45 (font-family: "g_d0_f11" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: rejected by sanitizer (font-family: "g_d0_f11" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
downloadable font: font load failed (font-family: "g_d0_f11" style:normal weight:normal stretch:normal src index:0) source: (invalid URI)(unknown)
Warning: Failed to load font ""g_d0_f11"": SyntaxError: An invalid or illegal string was specifiedpdf.js:277:5

The errors thus point to the glyf data validation in OTS, in particular src/glyf.cc#L101-L108.

Interestingly, if we called sanitizeGlyphLocations with hintsValid = false, see src/core/fonts.js#L1644-L1646, this would just fix things. I’m wondering if sanitizeTTPrograms, see src/core/fonts.js#L2084, is somehow failing to detect that the fonts aren’t well formed!?

[ash-recommind]

Done: Created ticket #8960