PDF zoom blurry in Android browser using nc apps

[jcbdg18]

Steps to reproduce

1. Open a pdf file with drawing like technical drawing in it. It happens in all apps (Pdf viewer, Onlyoffice, Reader (ebook reader)
2. Zoom in on Andoid in browser (Chrome/Firefix or other)

Expected behaviour

Text and drawing should shown sharp

Actual behaviour

Text and drawing shows blurry. If i download the file and open it with for example Foxit PDF, it shows correctly

Server configuration

Operating system:
Ubuntu Linux 18.04

Web server:
nginx/1.14.0

Database:
psql (PostgreSQL) 10.6

PHP version:
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
with Zend OPcache v7.2.10-0ubuntu0.18.04.1, Copyright (c) 1999-2018, by Zend Technologies

Nextcloud version: (see Nextcloud admin page)
13.0.5

Updated from an older Nextcloud/ownCloud or fresh install:
fresh install

Where did you install Nextcloud from:
nextcloud.com

Signing status:
No errors have been found.

List of activated apps:
activity files groupfolders sharebymail
admin_audit files_automatedtagging logreader survey_client
admin_notifications files_external lookup_server_connector systemtags
apporder files_pdfviewer mail theming
bruteforcesettings files_reader nextcloud_announcements theming_customcss
carnet files_rightclick notifications twofactor_backupcodes
comments files_sharing oauth2 twofactor_totp
dav files_texteditor onlyoffice updatenotification
defaultlinkopen files_trashbin password_policy user_external
drawio files_versions previewgenerator user_ldap
encryption files_videoplayer provisioning_api workflowengine
federatedfilesharing firstrunwizard registration
federation gallery serverinfo

Nextcloud configuration:

'...', 'passwordsalt' => '...', 'secret' => '...', 'trusted_domains' => array ( 0 => 'mysub.mydomain.com', ), 'datadirectory' => '/local/app/nextcloud/mysub.mydomain.com/data', 'overwrite.cli.url' => 'https://mysub.mydomain.com', 'dbtype' => 'pgsql', 'version' => '13.0.5.2', 'dbname' => '...', 'dbhost' => 'localhost', 'dbport' => '', 'dbtableprefix' => 'oc_', 'dbuser' => '...', 'dbpassword' => '...', 'installed' => true, 'default_language' => 'no', 'check_for_working_htaccess' => true, 'filelocking.enabled' => true, 'onlyoffice' => array ( 'verify_peer_off' => true, ), 'maintenance' => false, 'theme' => '', 'loglevel' => 2, 'lost_password_link' => 'disabled', 'skeletondirectory' => '/local/app/nextcloud/mysub.mydomain.com/skeleton', ); **Are you using external storage, if yes which one:** local/smb/sftp/... NO **Are you using encryption:** yes/no NO **Are you using an external user-backend, if yes which one:** LDAP/ActiveDirectory/Webdav/... NO ### Client configuration **Browser:** Chrome 68..3440.91 **Operating system:** Android version 9 Testet with different Andriod devices and Lower Android versions. The problem is the same on all devices. ### Logs #### Web server error log NO logs concerning this problem #### Nextcloud log (data/nextcloud.log) NO logs concerning this problem #### Browser log NO logs concerning this problem

[nextcloud-bot]

GitMate.io thinks possibly related issues are #101 (No Thumbnails with nextcloud on android-apps), #3460 (Apps cannot be installed using Chrome), #1987 (Warn if apps use the view), and #12294 (blurry buttons).

[jcbdg18]

None of these issues are related to my problem.

[jcbdg18]

Zooming result:

[ChristophWurst]

IMO this is an issue of https://github.com/nextcloud/files_pdfviewer. Please report it there. Thank you for your feedback! ✌️

[jcbdg18]

No, it's not a problem only of pdf viewer, it is a general problem with ALL apps that can show pdf, like onlyoffice, ebook reader, pdf viewer...

[jcbdg18]

Please reopen this issue

[jcbdg18]

Hei. No, it's not a problem only of pdf viewer, it is a general problem with ALL apps that can show pdf, like onlyoffice, ebook reader, pdf viewer.. Von meinem Xperia Smartphone von Sony gesendet

…

---- Christoph Wurst schrieb ---- IMO this is an issue of https://github.com/nextcloud/files_pdfviewer. Please report it there. Thank you for your feedback! ✌️ — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#12666 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/Ao4WZ1DCujUINkjAiBShfcChITz1zVdGks5u0GNBgaJpZM4YywOt>.

[ChristophWurst]

IMO there is nothing the server could fix here. It's up to the apps to handle zooming.

Anyway, reopening.