🚚 Move effect sources to separate directory

2023-01-29 12:42:06 +01:00
parent 764b8b9ffa
commit 6904762590
24 changed files with 43 additions and 43 deletions
@@ -0,0 +1,138 @@
+//////////////////////////////////////////////////////////////////////////////////////////
+//          )                                                   (                       //
+//       ( /(   (  (               )    (       (  (  (         )\ )    (  (            //
+//       )\()) ))\ )(   (         (     )\ )    )\))( )\  (    (()/( (  )\))(  (        //
+//      ((_)\ /((_|()\  )\ )      )\  '(()/(   ((_)()((_) )\ )  ((_)))\((_)()\ )\       //
+//      | |(_|_))( ((_)_(_/(    _((_))  )(_))  _(()((_|_)_(_/(  _| |((_)(()((_|(_)      //
+//      | '_ \ || | '_| ' \))  | '  \()| || |  \ V  V / | ' \)) _` / _ \ V  V (_-<      //
+//      |_.__/\_,_|_| |_||_|   |_|_|_|  \_, |   \_/\_/|_|_||_|\__,_\___/\_/\_//__/      //
+//                                 |__/                                                 //
+//////////////////////////////////////////////////////////////////////////////////////////
+
+// SPDX-FileCopyrightText: Simon Schneegans <code@simonschneegans.de>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+'use strict';
+
+const GObject = imports.gi.GObject;
+
+const _ = imports.gettext.domain('burn-my-windows').gettext;
+
+const ExtensionUtils = imports.misc.extensionUtils;
+const Me             = imports.misc.extensionUtils.getCurrentExtension();
+const utils          = Me.imports.src.utils;
+const ShaderFactory  = Me.imports.src.ShaderFactory.ShaderFactory;
+
+//////////////////////////////////////////////////////////////////////////////////////////
+// The Matrix shader 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.                       //
+//////////////////////////////////////////////////////////////////////////////////////////
+
+// The effect class can be used to get some metadata (like the effect's name or supported
+// GNOME Shell versions), to initialize the respective page of the settings dialog, as
+// well as to create the actual shader for the effect.
+var Matrix = class {
+
+  // The constructor creates a ShaderFactory which will be used by extension.js to create
+  // shader instances for this effect. The shaders will be automagically created using the
+  // GLSL file in resources/shaders/<nick>.glsl. The callback will be called for each
+  // newly created shader instance.
+  constructor() {
+    this.shaderFactory = new ShaderFactory(this.getNick(), (shader) => {
+      // We import these modules in this function as they are not available in the
+      // preferences process. This callback is only called within GNOME Shell's process.
+      const {Clutter, GdkPixbuf, Cogl} = imports.gi;
+
+      // Create the texture in the first call.
+      if (!this._fontTexture) {
+        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);
+      }
+
+      // Store uniform locations of newly created shaders.
+      shader._uFontTexture = shader.get_uniform_location('uFontTexture');
+      shader._uTrailColor  = shader.get_uniform_location('uTrailColor');
+      shader._uTipColor    = shader.get_uniform_location('uTipColor');
+      shader._uLetterSize  = shader.get_uniform_location('uLetterSize');
+      shader._uRandomness  = shader.get_uniform_location('uRandomness');
+      shader._uOverShoot   = shader.get_uniform_location('uOverShoot');
+
+      // Write all uniform values at the start of each animation.
+      shader.connect('begin-animation', (shader, settings) => {
+        const c1 =
+          Clutter.Color.from_string(settings.get_string('matrix-trail-color'))[1];
+        const c2 = Clutter.Color.from_string(settings.get_string('matrix-tip-color'))[1];
+
+        // clang-format off
+        shader.set_uniform_float(shader._uTrailColor, 3, [c1.red / 255, c1.green / 255, c1.blue / 255]);
+        shader.set_uniform_float(shader._uTipColor,   3, [c2.red / 255, c2.green / 255, c2.blue / 255]);
+        shader.set_uniform_float(shader._uLetterSize, 1, [settings.get_int('matrix-scale')]);
+        shader.set_uniform_float(shader._uRandomness, 1, [settings.get_double('matrix-randomness')]);
+        shader.set_uniform_float(shader._uOverShoot,  1, [settings.get_double('matrix-overshoot')]);
+        // clang-format on
+      });
+
+      // This is required 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
+      shader.connect('update-animation', (shader) => {
+        const pipeline = shader.get_pipeline();
+
+        // Bind the font texture.
+        pipeline.set_layer_texture(1, this._fontTexture.get_texture());
+        pipeline.set_uniform_1i(shader._uFontTexture, 1);
+      });
+    });
+  }
+
+  // ---------------------------------------------------------------------------- metadata
+
+  // This effect is only available on GNOME Shell 40+.
+  getMinShellVersion() {
+    return [40, 0];
+  }
+
+  // This will be called in various places where a unique identifier for this effect is
+  // required. It should match the prefix of the settings keys which store whether the
+  // effect is enabled currently (e.g. '*-enable-effect'), and its animation time
+  // (e.g. '*-animation-time').
+  getNick() {
+    return 'matrix';
+  }
+
+  // This will be shown in the sidebar of the preferences dialog as well as in the
+  // drop-down menus where the user can choose the effect.
+  getLabel() {
+    return _('Matrix');
+  }
+
+  // -------------------------------------------------------------------- API for prefs.js
+
+  // This is called by the preferences dialog whenever a new effect profile is loaded. It
+  // binds all user interface elements to the respective settings keys of the profile.
+  bindPreferences(dialog) {
+    dialog.bindAdjustment('matrix-animation-time');
+    dialog.bindAdjustment('matrix-scale');
+    dialog.bindAdjustment('matrix-randomness');
+    dialog.bindAdjustment('matrix-overshoot');
+    dialog.bindColorButton('matrix-trail-color');
+    dialog.bindColorButton('matrix-tip-color');
+  }
+
+  // ---------------------------------------------------------------- API for extension.js
+
+  // The getActorScale() is called from extension.js to adjust the actor's size during the
+  // animation. This is useful if the effect requires drawing something beyond the usual
+  // bounds of the actor. This only works for GNOME 3.38+.
+  getActorScale(settings) {
+    return {x: 1.0, y: 1.0 + settings.get_double('matrix-overshoot')};
+  }
+}