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2D跨域优化系统 - HyperGPU Pro版

异步计算管线与实时着色器编译引擎（整合降级策略）

// ==UserScript==
// @name         2D跨域优化系统 - HyperGPU Pro版
// @namespace    http://tampermonkey.net/
// @version      3.1.2
// @description  异步计算管线与实时着色器编译引擎（整合降级策略）
// @author       KiwiFruit
// @match        *://*/*
// @grant        none
// @license      MIT
// @require      https://cdnjs.cloudflare.com/ajax/libs/threads.js/2.7.0/threads.min.js
// @require      https://cdnjs.cloudflare.com/ajax/libs/queue.js/2.1.2/queue.min.js
// ==/UserScript==

(function() {
    'use strict';
    /* global WorkerPool,PriorityQueue,GPUProfiler,Queue,DataLoader,TextureCompressor */
    // 辅助函数：检测是否为视频页面
    function isVideoPage() {
        return window.location.pathname.includes('/video') ||
               document.querySelector('video') !== null;
    }

    // 增强型智能缓存系统（整合LRU+多维优先级）
    class SmartCache extends Map {
        constructor(maxSize = 1024 * 1024 * 256, maxEntries = 512, config = {}) {
            super();
            this.maxSize = maxSize;
            this.maxEntries = maxEntries;
            this.priorityWeights = {
                frequency: 0.4,
                recency: 0.3,
                size: 0.2,
                distance: 0.1,
                criticality: 0.2
            };
            this.stats = new Map();
            this.lastCleanup = 0;
            this.cleanupInterval = setInterval(() => this.cleanup(), 300000);
        }

        updateStats(id) {
            const now = Date.now();
            const stats = this.stats.get(id) || {
                count: 1,
                lastAccess: now,
                size: 0,
                position: 0
            };

            stats.count++;
            stats.lastAccess = now;
            this.stats.set(id, stats);
        }

        calculatePriority(id, resource) {
            const stats = this.stats.get(id);
            const freqWeight = Math.log(stats.count + 1);
            const timeWeight = Math.exp(-(Date.now() - stats.lastAccess) / 60000);
            const sizeWeight = 1 - (stats.size / this.maxSize);
            const distWeight = 1 - (Math.abs(stats.position - resource.position) / 1000);

            return (
                freqWeight * this.priorityWeights.frequency +
                timeWeight * this.priorityWeights.recency +
                sizeWeight * this.priorityWeights.size +
                distWeight * this.priorityWeights.distance
            );
        }

        evictIfFull() {
            if (this.size >= this.maxEntries) {
                setTimeout(() => {
                    const candidates = Array.from(this.entries())
                        .map(([id, value]) => ({
                            id,
                            priority: this.calculatePriority(id, value)
                        }))
                        .sort((a, b) => a.priority - b.priority);

                    candidates.slice(0, Math.ceil(this.maxEntries * 0.2))
                        .forEach(candidate => {
                            this.delete(candidate.id);
                            this.stats.delete(candidate.id);
                        });
                }, 0);
            }
        }

        set(id, value) {
            this.updateStats(id);
            super.set(id, value);
            this.evictIfFull();
        }

        get(id) {
            this.updateStats(id);
            return super.get(id);
        }

        cleanup() {
            const now = Date.now();
            if (now - this.lastCleanup < 300000) return; // 避免频繁清理
            this.lastCleanup = now;

            for (const [id, stats] of this.stats.entries()) {
                if (now - stats.lastAccess > 3600000) {
                    this.delete(id);
                    this.stats.delete(id);
                }
            }
        }
    }

    // 增强型任务调度器（支持WebGL降级）
    class TaskScheduler {
        constructor(maxWorkers = navigator.hardwareConcurrency - 1) {
            this.gpuSupported = false;
            this.gpuDevice = null;
            this.fallbackMode = 'webgl';
            this.workerPool = new WorkerPool(maxWorkers);
            this.gpuProfiler = new GPUProfiler();
            this.priorityQueue = new PriorityQueue();
        }

        async initGPU() {
            if (!navigator.gpu) {
                this.fallbackMode = 'webgl';
                return false;
            }

            try {
                const adapter = await navigator.gpu.requestAdapter();
                this.gpuDevice = await adapter.requestDevice();
                this.gpuSupported = true;
                return true;
            } catch (error) {
                console.warn('WebGPU初始化失败，降级到WebGL');
                this.fallbackMode = 'webgl';
                return false;
            }
        }

        async executeGPU(task) {
            if (!this.gpuSupported) return this.fallbackCPU(task);

            const commandEncoder = this.gpuDevice.createCommandEncoder();
            const passEncoder = commandEncoder.beginComputePass();

            passEncoder.dispatchWorkgroups(
                task.workgroups.x,
                task.workgroups.y,
                task.workgroups.z
            );

            passEncoder.end();
            this.gpuDevice.queue.submit([commandEncoder.finish()]);

            return { type: 'gpu', result: 'COMPLETED' };
        }

        async fallbackWebGL(task) {
            if (!this.glContext) {
                this.glContext = initWebGLContext();
            }

            const computeShader = this.glContext.createShader(this.glContext.COMPUTE_SHADER);
            this.glContext.shaderSource(computeShader, task.shaderCode);
            this.glContext.compileShader(computeShader);

            if (!this.glContext.getShaderParameter(computeShader, this.glContext.COMPILE_STATUS)) {
                console.error('WebGL计算着色器编译失败:', this.glContext.getShaderInfoLog(computeShader));
                return this.fallbackCPU(task);
            }

            const program = this.glContext.createProgram();
            this.glContext.attachShader(program, computeShader);
            this.glContext.linkProgram(program);

            this.glContext.useProgram(program);
            this.glContext.bindBufferBase(
                this.glContext.SHADER_STORAGE_BUFFER,
                0,
                task.buffer
            );

            this.glContext.dispatchCompute(
                task.workgroups.x,
                task.workgroups.y,
                task.workgroups.z
            );

            this.glContext.memoryBarrier(this.glContext.ALL_BARRIER_BITS);
            return { type: 'webgl', result: 'COMPLETED' };
        }

        async enqueueTask(task, priority = 'normal') {
            // 针对视频页面提高任务优先级
            if (isVideoPage() && task.type === 'video') {
                priority = 'high';
            }

            this.priorityQueue.add(task, priority);
            const nextTask = this.priorityQueue.getNext();

            try {
                if (nextTask.gpuRequired && this.gpuSupported) {
                    return await this.executeGPU(nextTask);
                }
                return await this.fallbackWebGL(nextTask);
            } catch (error) {
                console.error('任务执行失败:', error);
                return this.fallbackCPU(nextTask);
            }
        }
    }

    // 增强型着色器编译器（支持AOT优化）
    class ShaderCompiler {
        constructor() {
            this.cache = new Map();
            this.worker = new Worker('shader_compiler_worker.js');
            this.worker.onmessage = this.handleMessage.bind(this);
            this.optimizeQueue = new Queue({ concurrency: 2 });
        }

        async compile(source, options = {}) {
            const hash = this.generateHash(source);

            if (this.cache.has(hash)) {
                this.cache.get(hash).usageCount++;
                return this.cache.get(hash).binary;
            }

            try {
                const result = await this.compileInternal(source, options);
                this.cache.set(hash, {
                    binary: result,
                    usageCount: 1,
                    timestamp: Date.now()
                });
                this.optimizeQueue.defer(() => this.optimizeShader(source));
                return result;
            } catch (error) {
                return this.handleCompilationError(source, error);
            }
        }

        async compileInternal(source, options) {
            return new Promise((resolve, reject) => {
                this.worker.postMessage({
                    type: 'compile',
                    source,
                    options,
                    timestamp: Date.now()
                });

                this.worker.onmessage = (event) => {
                    if (event.data.error) {
                        reject(event.data.error);
                    } else {
                        resolve(event.data.binary);
                    }
                };
            });
        }

        async optimizeShader(source) {
            const profile = this.analyzeUsage(source);
            const optimized = this.applyOptimizations(source, profile);

            if (optimized !== source) {
                await this.compile(optimized, { optimized: true });
            }
        }

        analyzeUsage(source) {
            return {
                textureAccess: this.countTextureAccesses(source),
                uniformUsage: this.countUniforms(source),
                arithmetic: this.countOperations(source)
            };
        }

        applyOptimizations(source, profile) {
            let optimized = source;

            if (profile.textureAccess > 1000) {
                optimized = this.optimizeTextureSampling(optimized);
            }

            if (profile.uniformUsage > 20) {
                optimized = this.flattenUniforms(optimized);
            }

            return optimized;
        }
    }

    // 增强型资源加载器（支持纹理压缩）
    class ResourceLoader {
        constructor(cache) {
            this.cache = cache;
            this.loader = new DataLoader();
            this.compression = new TextureCompressor();
        }

        async loadTexture(url) {
            if (this.cache.has(url)) {
                return this.cache.get(url);
            }

            const texture = await this.loader.load(url);
            const optimized = this.applyOptimizations(texture);
            this.cache.set(url, optimized);
            return optimized;
        }

        applyOptimizations(texture) {
            const mips = this.generateMipmaps(texture);
            const format = this.selectCompressionFormat(texture);
            return this.convertFormat(texture, format, mips);
        }

        selectCompressionFormat(texture) {
            if (!this.glContext) {
                this.glContext = initWebGLContext();
            }

            if (this.glContext.getExtension('EXT_texture_compression_s3tc')) {
                return this.glContext.COMPRESSED_RGBA_S3TC_DXT1_EXT;
            }
            return this.glContext.RGBA;
        }

        generateMipmaps(texture) {
            return texture;
        }

        convertFormat(texture, format, mips) {
            return texture;
        }
    }

    // WebGL上下文初始化
    function initWebGLContext() {
        const canvas = document.createElement('canvas');
        canvas.style.cssText = `
            position: fixed;
            top: 0;
            left: 0;
            width: 1px;
            height: 1px;
            z-index: -1;
            pointer-events: none;
        `;
        document.body.appendChild(canvas);

        const gl = canvas.getContext('webgl2', {
            antialias: false,
            powerPreference: 'high-performance',
            preserveDrawingBuffer: false
        });

        if (!gl) {
            throw new Error('WebGL2不支持');
        }
        return gl;
    }

    // 性能监控工具
    class PerformanceMonitor {
        constructor() {
            this.metrics = {};
            this.lastUpdate = 0;
            this.visualizerElement = null;
        }

        startVisualizer(frequency = 1000) {
            this.visualizerElement = document.createElement('div');
            this.visualizerElement.style.cssText = `
                position: fixed;
                top: 10px;
                right: 10px;
                background: rgba(0, 0, 0, 0.7);
                color: white;
                padding: 10px;
                border-radius: 5px;
                z-index: 1000;
                font-family: Arial, sans-serif;
                pointer-events: none;
            `;
            document.body.appendChild(this.visualizerElement);

            this.updateInterval = setInterval(() => {
                this.updateMetrics();
                this.renderVisualizer();
            }, frequency);
        }

        updateMetrics() {
            // 更新性能指标逻辑
        }

        renderVisualizer() {
            if (!this.visualizerElement) return;

            let html = '<h3>性能监控</h3>';
            for (const [key, value] of Object.entries(this.metrics)) {
                html += `<div>${key}: ${value}</div>`;
            }
            this.visualizerElement.innerHTML = html;
        }
    }

    // 主系统初始化
    async function initSystem() {
        const cache = new SmartCache();
        const scheduler = new TaskScheduler();
        const shaderCompiler = new ShaderCompiler();
        const resourceLoader = new ResourceLoader(cache);

        // 启动性能监控
        const monitor = new PerformanceMonitor();
        monitor.startVisualizer(1000); // 降低更新频率

        // 根据页面类型调整资源加载策略
        if (!isVideoPage()) {
            await resourceLoader.loadAll([
                'core_math',
                'default_shader',
                'texture_packer'
            ]);
        }

        // 延迟 GPU 初始化
        window.addEventListener('load', async () => {
            await scheduler.initGPU();
        });

        // 返回系统实例
        return {
            cache,
            scheduler,
            shaderCompiler,
            resourceLoader,
            monitor
        };
    }

    // 启动系统
    (async () => {
        try {
            const system = await initSystem();

            // 设置事件监听
            window.addEventListener('resize', () => {
                system.scheduler.enqueueTask({
                    type: 'resize',
                    data: { width: window.innerWidth, height: window.innerHeight }
                }, 'high');
            });

            // 主循环
            function animate() {
                requestAnimationFrame(animate);
                system.monitor.updateMetrics();
                // 添加渲染逻辑...
            }
            animate();

        } catch (error) {
            console.error('系统初始化失败:', error);
        }
    })();
})();