PdfPreview not showing fonts on linux

[zigapk]

Describe the bug
When using PdfPreview on linux, all the text is missing in some pdf files. However, some other features features like lines remain visible. For example:

• This file works fine.
• Latex pdf sample is missing all the text.

I suspect this is an issue with missing font files, but can't find any documentation regarding this issue.

The same files work fine on web.

To Reproduce
Code snippet to reproduce the behavior:

final ByteData doc = await rootBundle.load('assets/asdf.pdf');
PdfPreview(
    build: (context) => doc.buffer.asUint8List(),
),

Expected behavior
All text should be visible. If there is a font missing, I'd expect to receive some kind of error or warning message.

Screenshots

Flutter Doctor

[✓] Flutter (Channel dev, 2.1.0-12.1.pre, on Linux, locale en_US.UTF-8)
    • Flutter version 2.1.0-12.1.pre at /opt/flutter
    • Framework revision 8264cb3e8a (3 weeks ago), 2021-03-10 12:37:57 -0800
    • Engine revision 711ab3fda0
    • Dart version 2.13.0 (build 2.13.0-116.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /home/zigapk/Android/Sdk
    • Platform android-30, build-tools 30.0.3
    • Java binary at: /opt/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • CHROME_EXECUTABLE = google-chrome-stable

[✓] Linux toolchain - develop for Linux desktop
    • Ubuntu clang version 11.0.0-2
    • cmake version 3.16.3
    • ninja version 1.10.0
    • pkg-config version 0.29.2

[✓] Android Studio (version 4.1)
    • Android Studio at /opt/android-studio
    • Flutter plugin version 54.1.1
    • Dart plugin version 201.9335
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] IntelliJ IDEA Ultimate Edition (version 2020.3)
    • IntelliJ at /opt/idea
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.54.3)
    • VS Code at /usr/share/code
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (2 available)
    • Linux (desktop) • linux  • linux-x64      • Linux
    • Chrome (web)    • chrome • web-javascript • Google Chrome 89.0.4389.90

• No issues found!

Desktop:

• iOS
• Android
• Browser
• Windows
• Linux

Tested on Ubuntu 20.10 and Arch Linux.

[DavBfr]

On Linux and Windows, it's using Google's Pdfium library, maybe an issue there.

[Y0ngg4n]

@DavBfr I see you did commented on the Google Pdfium Library and it did worked for mara004. Do you already worked out why this happens?

[DavBfr]

No, I don't understand what's wrong. Maybe some incompatibilities with the way Flutter configures the environment.
Let me know if you find more information.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days

[github-actions]

Closing this stale issue because it has no activity.