Justin Garza
102 lines
4.9 KiB
JavaScript
102 lines
4.9 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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//////////////////////////////////////////////////////////////////////////////////////////
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// SPDX-FileCopyrightText: Simon Schneegans <code@simonschneegans.de>
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// SPDX-License-Identifier: GPL-3.0-or-later
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'use strict';
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import * as utils from '../utils.js';
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// We import the ShaderFactory only in the Shell process as it is not required in the
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// preferences process. The preferences process does not create any shader instances, it
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// only uses the static metadata of the effect.
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const ShaderFactory = await utils.importInShellOnly('./ShaderFactory.js');
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const _ = await utils.importGettext();
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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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export default class Effect {
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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(Effect.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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static 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. '*-enable-effect'), and its animation time
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// (e.g. '*-animation-time').
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static 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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static getLabel() {
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return _('Pixelate');
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}
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// this can be used for searching, and helping people find the effect they are looking
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// for
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static description =
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'The Pixelate effect transforms the window into a pixelated mosaic, gradually obscuring it by increasing pixel size and randomly hiding pixels until the window fully disappears. This effect offers a playful, retro-inspired transition.';
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// -------------------------------------------------------------------- API for prefs.js
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// This is called by the preferences dialog whenever a new effect profile is loaded. It
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// binds all user interface elements to the respective settings keys of the profile.
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static bindPreferences(dialog) {
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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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}
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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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static getActorScale(settings, forOpening, actor) {
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return {x: 1.0, y: 1.0};
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}
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}
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