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♻️ Merge prefs and extension classes

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This commit is contained in:
Simon Schneegans
2022-01-09 20:41:02 +01:00
parent b726064e65
commit 46887df950
17 changed files with 871 additions and 896 deletions
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src/MatrixEffect.js
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//////////////////////////////////////////////////////////////////////////////////////////
// ) ( //
// ( /( ( ( ) ( ( ( ( )\ ) ( ( //
// )\()) ))\ )( ( ( )\ ) )\))( )\ ( (()/( ( )\))( ( //
// ((_)\ /((_|()\ )\ ) )\ '(()/( ((_)()((_) )\ ) ((_)))\((_)()\ )\ //
// | |(_|_))( ((_)_(_/( _((_)) )(_)) _(()((_|_)_(_/( _| |((_)(()((_|(_) //
// | '_ \ || | '_| ' \)) | ' \()| || | \ V V / | ' \)) _` / _ \ V V (_-< //
// |_.__/\_,_|_| |_||_| |_|_|_| \_, | \_/\_/|_|_||_|\__,_\___/\_/\_//__/ //
// |__/ //
// Copyright (c) 2021 Simon Schneegans //
// Released under the GPLv3 or later. See LICENSE file for details. //
//////////////////////////////////////////////////////////////////////////////////////////
'use strict';
const GObject = imports.gi.GObject;
const ExtensionUtils = imports.misc.extensionUtils;
const Me = imports.misc.extensionUtils.getCurrentExtension();
const utils = Me.imports.src.utils;
//////////////////////////////////////////////////////////////////////////////////////////
// The MatrixShader multiplies a grid of random letters with some gradients which are //
// moving from top to bottom. The speed of the moving gradients is chosen randomly. //
// Also, there is a random delay making the gradients not drop all at the same time. //
// This effect is not available on GNOME 3.3x, due to the limitation described in the //
// documentation of vfunc_paint_target further down in this file. //
//////////////////////////////////////////////////////////////////////////////////////////
let MatrixShader = null;
if (utils.isInShellProcess()) {
const {Clutter, GdkPixbuf, Cogl} = imports.gi;
const shaderSnippets = Me.imports.src.shaderSnippets;
MatrixShader = GObject.registerClass({Properties: {}, Signals: {}},
class MatrixShader extends Clutter.ShaderEffect {
_init(settings) {
super._init({shader_type: Clutter.ShaderType.FRAGMENT_SHADER});
// Load the font texture. As the shader is re-created for each window animation,
// this texture is also re-created each time. This could be improved in the future!
const fontData = GdkPixbuf.Pixbuf.new_from_resource('/img/matrixFont.png');
this._fontTexture = new Clutter.Image();
this._fontTexture.set_data(
fontData.get_pixels(),
fontData.has_alpha ? Cogl.PixelFormat.RGBA_8888 : Cogl.PixelFormat.RGB_888,
fontData.width, fontData.height, fontData.rowstride);
const trailColor =
Clutter.Color.from_string(settings.get_string('matrix-trail-color'))[1];
const tipColor =
Clutter.Color.from_string(settings.get_string('matrix-tip-color'))[1];
// The technique for this effect was inspired by
// https://www.shadertoy.com/view/ldccW4, however the implementation is quite
// different as the letters drop only once and there is no need for a noise texture.
this.set_shader_source(`
// Inject some common shader snippets.
${shaderSnippets.standardUniforms()}
${shaderSnippets.noise()}
uniform sampler2D uFontTexture;
// These may be configurable in the future.
const float EDGE_FADE = 30;
const float FADE_WIDTH = 150;
const float TRAIL_LENGTH = 0.2;
const float FINAL_FADE_START_TIME = 0.8;
const float LETTER_TILES = 16.0;
const float LETTER_SIZE = ${settings.get_int('matrix-scale')};
const float LETTER_FLICKER_SPEED = 2.0;
const float RANDOMNESS = ${settings.get_double('matrix-randomness')};
// This returns a flickering grid of random letters.
float getText(vec2 fragCoord) {
vec2 pixelCoords = fragCoord * vec2(uSizeX, uSizeY);
vec2 uv = mod(pixelCoords.xy, LETTER_SIZE)/LETTER_SIZE;
vec2 block = pixelCoords/LETTER_SIZE - uv;
// Choose random letter.
uv += floor(hash2D(floor(hash2D(block)*vec2(12.9898,78.233) + LETTER_FLICKER_SPEED*uTime + 42.254))*LETTER_TILES);
return texture2D(uFontTexture, uv/LETTER_TILES).r;
}
// This returns two values: The first are gradients for the "raindrops" which move
// from top to bottom. This is used for fading the letters. The second value is set
// to one below each drop and to zero above it. This second value is used for fading
// the window texture.
vec2 getRain(vec2 fragCoord) {
vec2 coords = fragCoord * vec2(uSizeX, uSizeY);
coords.x -= mod(coords.x, LETTER_SIZE);
float delay = fract(sin(coords.x)*78.233) * mix(0.0, 1.0, RANDOMNESS);
float speed = fract(cos(coords.x)*12.989) * mix(0.0, 0.3, RANDOMNESS) + 1.5;
float distToDrop = (uProgress*2-delay)*speed - fragCoord.y;
float rainAlpha = distToDrop >= 0 ? exp(-distToDrop/TRAIL_LENGTH) : 0;
float windowAlpha = 1 - clamp(uSizeY*distToDrop, 0, FADE_WIDTH) / FADE_WIDTH;
return vec2(rainAlpha, windowAlpha);
}
void main() {
// Get a cool matrix effect. See comments for those methods above.
vec2 rain = getRain(cogl_tex_coord_in[0].st);
float text = getText(cogl_tex_coord_in[0].st);
// Get the window texture and fade it according to the effect mask.
cogl_color_out = texture2D(uTexture, cogl_tex_coord_in[0].st) * rain.y;
// This is used to fade out the remaining trails in the end.
float finalFade = 1-clamp((uProgress-FINAL_FADE_START_TIME)/
(1-FINAL_FADE_START_TIME), 0, 1);
float rainAlpha = finalFade * rain.x;
// Fade at window borders.
vec2 pos = cogl_tex_coord_in[0].st * vec2(uSizeX, uSizeY);
rainAlpha *= clamp(pos.x / EDGE_FADE, 0, 1);
rainAlpha *= clamp(pos.y / EDGE_FADE, 0, 1);
rainAlpha *= clamp((uSizeX - pos.x) / EDGE_FADE, 0, 1);
rainAlpha *= clamp((uSizeY - pos.y) / EDGE_FADE, 0, 1);
// Add the matrix effect to the window.
vec3 trailColor = vec3(${trailColor.red / 255},
${trailColor.green / 255},
${trailColor.blue / 255});
vec3 tipColor = vec3(${tipColor.red / 255},
${tipColor.green / 255},
${tipColor.blue / 255});
cogl_color_out.rgb += mix(trailColor, tipColor, min(1, pow(rainAlpha+0.1, 4))) * rainAlpha * text;
// These are pretty useful for understanding how this works.
// cogl_color_out = vec4(vec3(text), 1);
// cogl_color_out = vec4(vec3(rain.x), 1);
// cogl_color_out = vec4(vec3(rain.y), 1);
}
`);
};
// This is overridden to bind the font texture for drawing. Sadly, this seems to be
// impossible under GNOME 3.3x as this.get_pipeline() is not available. It was called
// get_target() back then but this is not wrapped in GJS.
// https://gitlab.gnome.org/GNOME/mutter/-/blob/gnome-3-36/clutter/clutter/clutter-offscreen-effect.c#L598
vfunc_paint_target(node, paint_context) {
const pipeline = this.get_pipeline();
pipeline.set_layer_texture(1, this._fontTexture.get_texture());
this.set_uniform_value('uFontTexture', 1);
super.vfunc_paint_target(node, paint_context);
}
});
}
var MatrixEffect = class MatrixEffect {
// ---------------------------------------------------------------------- static methods
static getMinShellVersion() {
return [40, 0];
}
static getSettingsPrefix() {
return 'matrix';
}
static getLabel() {
return 'Matrix';
}
static initPreferences(dialog) {
dialog.getBuilder().add_from_resource('/ui/gtk4/matrixPage.ui');
// Bind all properties.
dialog.bindAdjustment('matrix-animation-time');
dialog.bindAdjustment('matrix-scale');
dialog.bindAdjustment('matrix-randomness');
dialog.bindColorButton('matrix-trail-color');
dialog.bindColorButton('matrix-tip-color');
const stack = dialog.getBuilder().get_object('main-stack');
stack.add_titled(dialog.getBuilder().get_object('matrix-prefs'), 'matrix', 'Matrix');
}
static createShader(settings) {
return new MatrixShader(settings);
}
}