Brightness / Contrast plugin

[camillevilla]

We want to use this as an opportunity for testing out plugin architecture.

• Not in projectmirador/mirador repo

[jvine]

• add "Adjust image" option to the window menu, in the section below view/thumbnails
• on select, close the menu and open the "Adjust image" toolbar
• toolbar is horizontal above the mobile breakpoint; vertical below it
  • note that we may want a configuration option to set the default orientation for the toolbar - manuscripts with vertical text will prefer a vertical toolbar that doesn't cut off the first character of each column
• toolbar has its own close button
• icon tooltips appear below or to the left, depending on the orientation of the toolbar
• toolbar pattern is meant be used for other tools & plugins as well - annotations, ruler, etc.

The illustrated set of icons represents what's implemented in Mirador2:

Partial implementation with Brightness/Contrast alone would look like so:

Tooltip	Icon (MUI name)
Adjust image (menu option)	tune
Brightness	brightness_5
Contrast	custom (ask @jvine for this one)
Greyscale	tonality (different from mockups)
Invert colors	invert_colors
Rotate right	rotate_right
Rotate left	rotate_left
Flip horizontal	compare_arrows
Flip vertical	compare_arrows rotated
Revert image	refresh
Close toolbar	close

[mejackreed]

I started working on this https://github.com/mejackreed/mirador-image-tools however, I think its blocked until we can resolve the "Where does the PluginHook thing happen for all the things?" question.

[mejackreed]

Ok so updates.. I've moved the repo here: https://github.com/projectmirador/mirador-image-tools

Will start creating spin off tickets there and here to move work/plugins forward.

[mejackreed]

Check it out here: https://drive.google.com/file/d/1_OsPPJsKm7ufpCbwLaNnRye4mE0nrDVt/view?usp=sharing

[mejackreed]

Closing this issue as "done for now" as a proof of concept of the plugin and plugin system has been completed.