Creates a layer surface from a given GLSL fragment shader.
Can be used to create a simple overlay for a wayland compositor, a status bar, or a wallpaper.
- A wayland compositor supporting
wlr-layer-shell-unstable-v1
glshell FRAGMENT [OPTIONS]
FRAGMENT path to the fragment shader
-w, --width <width> set the width of the overlay
default: image width
-h, --height <height> set the height of the overlay
default: image height
-m, --margin <margin> set the margin of the overlay
default: 0
-a, --anchor <anchor>:<anchor> set the anchors of the overlay
(top|middle|bottom):(left|middle|right)
default: none (full screen)
-r, --reserve reserve space for the overlay
default: false
-l, --layer <layer> set the layer of the overlay
(background|bottom|top|overlay)
default: overlay
-o, --output <output> set the output of the overlay
default: NULL
glshell example/mandelbrot.frag -l background
glshell example/mandelbrot.frag -h 300 -m 10 -a top:middle -r -l bottom
The shader is provided with the following uniforms:
uniform vec2 u_resolution; // the resolution of the overlay
uniform vec2 u_time; // the time since the overlay was created in seconds
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