Simon Schneegans
103 lines
4.8 KiB
JavaScript
103 lines
4.8 KiB
JavaScript
//////////////////////////////////////////////////////////////////////////////////////////
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// ) ( //
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// ( /( ( ( ) ( ( ( ( )\ ) ( ( //
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// )\()) ))\ )( ( ( )\ ) )\))( )\ ( (()/( ( )\))( ( //
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// ((_)\ /((_|()\ )\ ) )\ '(()/( ((_)()((_) )\ ) ((_)))\((_)()\ )\ //
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// | |(_|_))( ((_)_(_/( _((_)) )(_)) _(()((_|_)_(_/( _| |((_)(()((_|(_) //
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// | '_ \ || | '_| ' \)) | ' \()| || | \ V V / | ' \)) _` / _ \ V V (_-< //
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// |_.__/\_,_|_| |_||_| |_|_|_| \_, | \_/\_/|_|_||_|\__,_\___/\_/\_//__/ //
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// |__/ //
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// Copyright (c) 2021 Simon Schneegans //
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// Released under the GPLv3 or later. See LICENSE file for details. //
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//////////////////////////////////////////////////////////////////////////////////////////
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'use strict';
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const GObject = imports.gi.GObject;
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const _ = imports.gettext.domain('burn-my-windows').gettext;
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const ExtensionUtils = imports.misc.extensionUtils;
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const Me = imports.misc.extensionUtils.getCurrentExtension();
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const utils = Me.imports.src.utils;
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const ShaderFactory = Me.imports.src.ShaderFactory.ShaderFactory;
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//////////////////////////////////////////////////////////////////////////////////////////
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// This very simple effect pixelates the window texture and randomly hides pixels until //
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// the entire window is gone. //
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//////////////////////////////////////////////////////////////////////////////////////////
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// The effect class can be used to get some metadata (like the effect's name or supported
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// GNOME Shell versions), to initialize the respective page of the settings dialog, as
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// well as to create the actual shader for the effect.
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var Pixelate = class {
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// The constructor creates a ShaderFactory which will be used by extension.js to create
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// shader instances for this effect. The shaders will be automagically created using the
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// GLSL file in resources/shaders/<nick>.glsl. The callback will be called for each
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// newly created shader instance.
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constructor() {
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this.shaderFactory = new ShaderFactory(this.getNick(), (shader) => {
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// Store uniform locations of newly created shaders.
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shader._uNoise = shader.get_uniform_location('uNoise');
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shader._uPixelSize = shader.get_uniform_location('uPixelSize');
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// Write all uniform values at the start of each animation.
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shader.connect('begin-animation', (shader, settings) => {
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// clang-format off
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shader.set_uniform_float(shader._uNoise, 1, [settings.get_double('pixelate-noise')]);
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shader.set_uniform_float(shader._uPixelSize, 1, [settings.get_int('pixelate-pixel-size')]);
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// clang-format on
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});
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});
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}
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// ---------------------------------------------------------------------------- metadata
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// The effect is available on all GNOME Shell versions supported by this extension.
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getMinShellVersion() {
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return [3, 36];
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}
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// This will be called in various places where a unique identifier for this effect is
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// required. It should match the prefix of the settings keys which store whether the
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// effect is enabled currently (e.g. '*-close-effect'), and its animation time
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// (e.g. '*-animation-time').
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getNick() {
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return 'pixelate';
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}
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// This will be shown in the sidebar of the preferences dialog as well as in the
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// drop-down menus where the user can choose the effect.
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getLabel() {
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return _('Pixelate');
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}
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// -------------------------------------------------------------------- API for prefs.js
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// This is called by the preferences dialog. It loads the settings page for this effect,
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// and binds all properties to the settings.
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getPreferences(dialog) {
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// Add the settings page to the builder.
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dialog.getBuilder().add_from_resource(`/ui/${utils.getGTKString()}/Pixelate.ui`);
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// Bind all properties.
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dialog.bindAdjustment('pixelate-animation-time');
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dialog.bindAdjustment('pixelate-noise');
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dialog.bindAdjustment('pixelate-pixel-size');
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// Finally, return the new settings page.
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return dialog.getBuilder().get_object('pixelate-prefs');
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}
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// ---------------------------------------------------------------- API for extension.js
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// The getActorScale() is called from extension.js to adjust the actor's size during the
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// animation. This is useful if the effect requires drawing something beyond the usual
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// bounds of the actor. This only works for GNOME 3.38+.
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getActorScale(settings) {
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return {x: 1.0, y: 1.0};
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}
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}
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