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Tsoding Build Status

Boomer

Zoomer application for Linux.

This fork's changes

Scrolling direction is reversed. I find it easier to scroll towards me, and there's also the nice semantic effect of feeling like I'm pulling the screen towards me.

Right click does almost the same thing as 0: it keeps the same position, instead or resetting it.

w, however, is equivalent to 0.

Middle click closes boomer. e does as well.

Flashlight moved to g.

The biggest, and most important change, is how the zooming happens.

In upstream, the more you zoom in, the more effort it takes to zoom in further. I'm guessing that either Tsoding didn't mind that behavior, or made it that way to avoid accidental overscrolling.

In this fork, instead of adding velocity flatly any time you scroll to zoom, the velocity is multiplied by the current scale. This results in that the effort you need to put in to scroll doesn't change depending on your current zoom level.

You get reasonably okay keyboard support. a, s, d, f, h, j, k, l move the camera to 8 different directions; x and v zoom out / in, relative to (unfortunately) your mouse cursor. These moving and zooming hotkeys still play by the new velocity rules nicely.

Dependencies

Debian

$ sudo apt-get install libgl1-mesa-dev libx11-dev libxext-dev libxrandr-dev

Quick Start

$ nimble build
$ ./boomer --help
$ ./boomer          # to just start using

Developer Capabilities

For additional Developer Capabilities compile the application with the following flags:

$ nimble build -d:developer

This will enable reloading the shaders with Ctrl+R. The shader files (frag.glsl and vert.glsl) should be located in the same folder as boomer.nim for this feature to work. If the shader files not found the program won't even start.

Keep in mind that the developer build is not suitable for day-to-day usage because it creates the external dependency on the shader files. Compiling the program without -d:developer "bakes" the shaders into the executable and eliminates the dependency.

Controls

Control Description
0 or w Reset the application state (position, scale, velocity, etc).
d or Right click Reset the application state, excluding position.
q or ESC or Middle click or e Quit the application.
r Reload configuration.
Ctrl + r Reload the shaders (only for Developer mode)
g Toggle flashlight effect.
Drag with left mouse button Move the image around.
Scroll wheel or =/- Zoom in/out.
Ctrl + Scroll wheel Change the radious of the flaslight.

Configuration

Configuration file is located at $HOME/.config/boomer/config and has roughly the following format:

<param-1> = <value-1>
<param-2> = <value-2>
# comment
<param-3> = <value-3>

You can generate a new config at $HOME/.config/boomer/config with $ boomer --new-config.

Supported parameters:

Name Description
min_scale The smallest it can get when zooming out
scroll_speed How quickly you can zoom in/out by scrolling
drag_friction How quickly the movement slows down after dragging
scale_friction How quickly the zoom slows down after scrolling

Experimental Features Compilation Flags

Experimental or unstable features can be enabled by passing the following flags to nimble build command:

Flag Description
-d:live Live image update. See issue #26.
-d:mitshm Enables faster Live image update using MIT-SHM X11 extension. Should be used along with -d:live to have an effect
-d:select Application lets the user to click on te window to "track" and it will track that specific window instead of the whole screen.

NixOS Overlay

$ git clone git://github.com/tsoding/boomer.git /path/to/boomer
$ mkdir -p ~/.config/nixpkgs/overlays
$ cd ~/.config/nixpkgs/overlays
$ ln -s /path/to/boomer/overlay/ boomer
$ nix-env -iA nixos.boomer

References

Support

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