59 lines
1.9 KiB
JavaScript
59 lines
1.9 KiB
JavaScript
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// This code istaken from the blur-my-shell extension
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//'use strict';
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import Clutter from 'gi://Clutter';
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import Shell from 'gi://Shell';
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import GObject from 'gi://GObject';
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import GLib from 'gi://GLib';
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const SHADER_PATH = GLib.filename_from_uri(GLib.uri_resolve_relative(import.meta.url, 'glitch_effect.glsl', GLib.UriFlags.NONE))[0];
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const get_shader_source = _ => {
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try {
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return Shell.get_file_contents_utf8_sync(SHADER_PATH);
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} catch (e) {
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log(`[Coverflow Alt-Tab] error loading shader from ${SHADER_PATH}: ${e}`);
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return null;
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}
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};
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/// New Clutter Shader Effect that simply mixes a color in, the class applies
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/// the GLSL shader programmed into vfunc_get_static_shader_source and applies
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/// it to an Actor.
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///
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/// Clutter Shader Source Code:
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/// https://github.com/GNOME/clutter/blob/master/clutter/clutter-shader-effect.c
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///
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/// GJS Doc:
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/// https://gjs-docs.gnome.org/clutter10~10_api/clutter.shadereffect
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export const GlitchEffect = new GObject.registerClass({
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GTypeName: "CoverflowAltTabGlitchEffect",
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}, class CoverflowAltTabGlitchShader extends Clutter.ShaderEffect {
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_init(params) {
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super._init(params);
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this._timeOffset = Math.random() * 1000000;
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// set shader source
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this._source = get_shader_source();
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if (this._source)
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this.set_shader_source(this._source);
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this.set_enabled(true);
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}
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vfunc_paint_target(paint_node = null, paint_context = null) {
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const time = this._timeOffset + GLib.get_monotonic_time() / GLib.USEC_PER_SEC;
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this.set_uniform_value("time", time);
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this.set_uniform_value("tex", 0);
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if (paint_node && paint_context)
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super.vfunc_paint_target(paint_node, paint_context);
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else if (paint_node)
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super.vfunc_paint_target(paint_node);
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else
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super.vfunc_paint_target();
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this.queue_repaint();
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}
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});
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