Resolves #1069

The Matrix spec requires servers to provide thumbnails at (96x96, crop) and (320x240, scale) among others. [1] The avatars in Nheko's global/room profile and room settings are sized 130x130 on normal scaling and 260x260 on 2x scaling like on a HiDPI device. In both cases the avatar is requested as cropped and that way displayed at 96x96, making it look blurry.

This can be solved by requesting scaled avatars rather than cropped where appropriate, and cropping to the requested size afterwards.

HiDPI can be simulated in Qt by setting QT_SCALE_FACTOR=2.

[1] https://spec.matrix.org/v1.3/client-server-api/#thumbnails

This adds functionality for viewing joined rooms and activating rooms.

fixes #875

- If an inline image has specified a height, add parameters to the
  image:// URI.
- Add scaled to the parameters, the images would be cropped otherwise.
- Extract the height from image:// URI and use it for requestSize.
- Use scaledToHeight instead of scaled.

Most noticeable in the goose chooser.

Loren Burkholder authored 4 years ago and Nicolas Werner committed 4 years ago

There was nowhere that an actual pointer was passed, and I wanted to do references for something else.

Fixes some issues with inline images.

Sometimes thumbnails still have the wrong dimensions, as they are scaled
to fit inside a rectange of the reported size in the image. Not sure,
who is wrong there, the media repo or we.

It is a bit of a hack, but it works...

Thanks to red_sky for the feedback!