import GObject from 'gi://GObject'; import * as utils from '../conveniences/utils.js'; const Shell = await utils.import_in_shell_only('gi://Shell'); const Clutter = await utils.import_in_shell_only('gi://Clutter'); const SHADER_FILENAME = 'derivative.glsl'; const DEFAULT_PARAMS = { operation: 0, width: 0, height: 0 }; export const DerivativeEffect = utils.IS_IN_PREFERENCES ? { default_params: DEFAULT_PARAMS } : new GObject.registerClass({ GTypeName: "DerivativeEffect", Properties: { 'operation': GObject.ParamSpec.int( `operation`, `Operation`, `Operation`, GObject.ParamFlags.READWRITE, 0, 2, 0, ), 'width': GObject.ParamSpec.double( `width`, `Width`, `Width`, GObject.ParamFlags.READWRITE, 0.0, Number.MAX_SAFE_INTEGER, 0.0, ), 'height': GObject.ParamSpec.double( `height`, `Height`, `Height`, GObject.ParamFlags.READWRITE, 0.0, Number.MAX_SAFE_INTEGER, 0.0, ) } }, class DerivativeEffect extends Clutter.ShaderEffect { constructor(params) { super(params); utils.setup_params(this, params); // set shader source this._source = utils.get_shader_source(Shell, SHADER_FILENAME, import.meta.url); if (this._source) this.set_shader_source(this._source); } static get default_params() { return DEFAULT_PARAMS; } get operation() { return this._operation; } set operation(value) { if (this._operation !== value) { this._operation = value; this.set_uniform_value('operation', this._operation); } } get width() { return this._width; } set width(value) { if (this._width !== value) { this._width = value; this.set_uniform_value('width', parseFloat(this._width - 1e-6)); } } get height() { return this._height; } set height(value) { if (this._height !== value) { this._height = value; this.set_uniform_value('height', parseFloat(this._height - 1e-6)); } } vfunc_set_actor(actor) { if (this._actor_connection_size_id) { let old_actor = this.get_actor(); old_actor?.disconnect(this._actor_connection_size_id); } if (actor) { this.width = actor.width; this.height = actor.height; this._actor_connection_size_id = actor.connect('notify::size', _ => { this.width = actor.width; this.height = actor.height; }); } else this._actor_connection_size_id = null; super.vfunc_set_actor(actor); } vfunc_paint_target(paint_node, paint_context) { // force setting nearest-neighbour texture filtering this.get_pipeline().set_layer_filters(0, 9728, 9728); super.vfunc_paint_target(paint_node, paint_context); } });