Raveos gnome update

1 files changed, 94 insertions, 0 deletions

diff --git a/raveos-gnome-theme/theme-data/extensions/installed/burn-my-windows@schneegans.github.com/src/ShaderFactory.js b/raveos-gnome-theme/theme-data/extensions/installed/burn-my-windows@schneegans.github.com/src/ShaderFactory.js
new file mode 100644
index 0000000..6056262
--- /dev/null
+++ b/raveos-gnome-theme/theme-data/extensions/installed/burn-my-windows@schneegans.github.com/src/ShaderFactory.js
@@ -0,0 +1,94 @@
+//////////////////////////////////////////////////////////////////////////////////////////
+//          )                                                   (                       //
+//       ( /(   (  (               )    (       (  (  (         )\ )    (  (            //
+//       )\()) ))\ )(   (         (     )\ )    )\))( )\  (    (()/( (  )\))(  (        //
+//      ((_)\ /((_|()\  )\ )      )\  '(()/(   ((_)()((_) )\ )  ((_)))\((_)()\ )\       //
+//      | |(_|_))( ((_)_(_/(    _((_))  )(_))  _(()((_|_)_(_/(  _| |((_)(()((_|(_)      //
+//      | '_ \ || | '_| ' \))  | '  \()| || |  \ V  V / | ' \)) _` / _ \ V  V (_-<      //
+//      |_.__/\_,_|_| |_||_|   |_|_|_|  \_, |   \_/\_/|_|_||_|\__,_\___/\_/\_//__/      //
+//                                 |__/                                                 //
+//////////////////////////////////////////////////////////////////////////////////////////
+
+// SPDX-FileCopyrightText: Simon Schneegans <code@simonschneegans.de>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+'use strict';
+
+import GObject from 'gi://GObject';
+
+import {Shader} from './Shader.js';
+
+//////////////////////////////////////////////////////////////////////////////////////////
+// Each effect of Burn-My-Windows owns an instance of this class. It is used to create  //
+// shaders whenever a new one is required. It tries to re-use old shaders as much as    //
+// possible in order to avoid memory leaks.                                             //
+//////////////////////////////////////////////////////////////////////////////////////////
+
+export default class ShaderFactory {
+
+  // Creates a new ShaderFactory. Requires the nick of the effect and a callback function
+  // which will be called whenever a new shader is created.
+  constructor(nick, setupFunc) {
+    // The _freeShaders array contains previously created shaders which are not currently
+    // in use.
+    this._freeShaders = [];
+
+    // The nick of the effect is required when creating new shaders as it's part of the
+    // GLSL source code file name.
+    this._nick = nick;
+
+    // Store the setup callback.
+    this._setupFunc = setupFunc;
+  }
+
+  // ---------------------------------------------------------------- API for extension.js
+
+  // This is called from extension.js whenever a window is opened or closed. It returns an
+  // instance of the shader class, trying to reuse previously created shaders. If a new
+  // shader instance is required, it calls creates a new one and calls the setupFunc
+  // thereafter.
+  getShader() {
+    let shader;
+
+    // If there are currently no free shaders, we have to create a new one.
+    if (this._freeShaders.length == 0) {
+
+      // Since Shell.GLSLEffect caches the shader source per class (not per instance), we
+      // have to derive a new shader type for each effect. The type name contains the nick
+      // of the effect to make it unique.
+      const typeName = `BurnMyWindowsShader_${this._nick}`;
+
+      // Only try to register the new type once.
+      if (GObject.type_from_name(typeName) == null) {
+        const outerThis = this;
+        GObject.registerClass({GTypeName: typeName}, class ShaderImp extends Shader {
+          // This will actually load the GLSL source code from the resources.
+          _init() {
+            super._init(outerThis._nick);
+          }
+
+          // This can be called to mark this instance to be re-usable.
+          returnToFactory() {
+            outerThis._freeShaders.push(this);
+          }
+        });
+      }
+
+      // Now create a niew instance of the newly registered shader type.
+      // GObject.Object.new is only available with newer versions of GJS.
+      if (GObject.Object.new) {
+        shader = GObject.Object.new(GObject.type_from_name(typeName), {});
+      } else {
+        shader = GObject.Object.newv(GObject.type_from_name(typeName), []);
+      }
+
+      // Call the provided setup callback.
+      this._setupFunc(shader);
+
+    } else {
+      shader = this._freeShaders.pop();
+    }
+
+    return shader;
+  }
+}
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