README: Cleanup outdated installation methods

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Sophie Herold 2023-11-28 21:41:23 +01:00
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# Image Viewer (Loupe)
An image viewer application written with GTK 4, Libadwaita and Rust.
<a href='https://flathub.org/apps/org.gnome.Loupe'><img width='240' alt='Download on Flathub' src='https://dl.flathub.org/assets/badges/flathub-badge-en.png'/></a>
![Image Viewer Screenshot](https://static.gnome.org/appdata/gnome-45/loupe/loupe-main.png)
GNOME's default image viewer providing
## Installing
The latest version from the main branch is available from the build artifacts.
Download bundle for:
* [x86_64](https://gitlab.gnome.org/api/v4/projects/13923/jobs/artifacts/main/raw/org.gnome.Loupe.Devel.flatpak?job=flatpak) (Average desktop or laptop PC)
* [aarch64](https://gitlab.gnome.org/api/v4/projects/13923/jobs/artifacts/main/raw/org.gnome.Loupe.Devel.flatpak?job=flatpak@aarch64) (Average phone, tablet, or Apple Silicon devices)
Bundles will not be automatically updated after installation.
## Features
- Fast GPU accelerated image rendering with tiled rendering for SVGs
- Fast GPU-accelerated image rendering with tiled rendering for SVGs
- Extendable and sandboxed image decoding
- Support for more than 15 image formats by default
- Extensive support for touchpad and touchscreen gestures
- Accessible presentation of the most important metadata
- Sleek but powerful interface developed in conjunction with GNOME Human Interface Guidelines
## Supported Formats
![Image Viewer Screenshot](https://static.gnome.org/appdata/gnome-45/loupe/loupe-main.png)
## Supported Image Formats
Image Viewer uses [glycin](https://gitlab.gnome.org/sophie-h/glycin) for loading images. You can check [glycin's README](https://gitlab.gnome.org/sophie-h/glycin#supported-image-formats) for more details about the formats supported by the default loaders. However, glycin supports adding loaders for additional formats. Therefore, the supported formats on your system may vary and might be changed by installing or removing glycin loaders.
## Building
### GNOME Builder
GNOME Builder is the environment used for developing this application. It can use Flatpak manifests to create a consistent building and running environment cross-distro. Thus, it is highly
recommended you use it.
1. Download [GNOME Builder](https://flathub.org/apps/details/org.gnome.Builder).
2. In Builder, click the "Clone Repository" button at the bottom, using `git@ssh.gitlab.gnome.org:GNOME/loupe.git`
or `https://gitlab.gnome.org/GNOME/loupe.git` as the URL.
3. Click the build button at the top once the project is loaded.
## Installation
Depending on how you want it installed instructions can differ. If you
used GNOME Builder to build it, clicking the bar at the top window will
open a submenu with "Export Bundle". This will create a flatpak bundle,
which can be installed on any system that supports flatpak.
**In order for the Image Viewer flatpak to be able to read the directory images are installed in, you must install a bundle.**
Once you have a bundle installed, development builds will work properly.
## Contributing
- [Code Documentation](https://gnome.pages.gitlab.gnome.org/loupe/doc/loupe/)
Contributions of all kinds are very welcome. Check the
### Conduct
- [Welcome to GNOME: Loupe](https://teams.pages.gitlab.gnome.org/Websites/welcome.gnome.org/app/Loupe/)
Image Viewer operates under the GNOME Code Of Conduct. See the full
text of the Code Of Conduct [here](CODE_OF_CONDUCT.md).
pages for more information. If you are manually building Loupe on your system with Builder, make sure that you also have installed the [nightly version](https://teams.pages.gitlab.gnome.org/Websites/welcome.gnome.org/app/Loupe/#installing-a-nightly-build) for all features to work.
Documentation of Loupe's code is available online:
- [Loupe Code Documentation](https://gnome.pages.gitlab.gnome.org/loupe/doc/loupe/)
### Code of Conduct
When interacting with the project, the [GNOME Code Of Conduct](https://conduct.gnome.org/) applies.