Afterglow v2.0.0

Afterglow v2.0.0 — Stability & Smoothness Hardening

长期运行稳定性大版本，消除崩溃/OOM 风险，改善动画精度。

Changes

• D2D 设备丢失自动恢复 — GPU 驱动重置/显示模式切换后自动重建渲染链，不再黑屏
• 全尺寸图片缓存 LRU 淘汰 — 256MB 上限，浏览大量高分辨率图片不再 OOM
• 抖动动画精度保护 — editModeTime_ fmod 包装，长时间编辑模式不再抖动异常
• 缩略图请求失败清理 — 解码失败的路径可被重试，不再永久卡住
• 删除 4 个渲染器死代码方法 — 减少无用 GPU 开销
• 快速滚动检测灵敏度提升 — 平滑系数 0.6/0.4，~2-3 帧响应
• 窗口图标修复 — 标题栏现在正确显示应用图标

Download

下载 afterglow.exe 即可运行，无需安装。

v1.5.2 — Scan Pipeline Jank Fix

What's Changed

Eliminates the visible stutter/jank during startup scan (blue progress bar phase).

Performance Fixes

• Freeze gallery during scan — no more O(n) full rebuilds every 200 images; gallery data is rebuilt once when scan completes
• Remove intermediate flush — eliminates ~25 O(n log n) sorts on the scan thread
• Scan thread priority lowered to BELOW_NORMAL so rendering thread gets CPU priority
• 60fps throttle replaces 100% CPU spin during scan (~5% CPU usage now)
• Async LoadPersistentThumbs — first frame renders 5-50ms earlier

UX Polish

• Smooth sinusoidal progress bar — silky ease-in-out sweep replaces the old jumpy bar

v1.5.1-tuning

v1.5.1-tuning — Robustness Polish

v1.5.0 性能优化的健壮性打磨，不加新功能，只修复异常安全、线程安全、资源泄漏等隐患。

Fixes

1. ThreadPool 异常安全 — task.fn() 用 try-catch 包裹，memory order 从 relaxed 升级为 acq_rel
2. BackgroundModeGuard RAII — THREAD_MODE_BACKGROUND BEGIN/END 配对用 RAII 替代手动调用
3. Tier 2 解压移到锁外 — ~0.3ms 解压不再持有 cacheMutex_；CompressorGuard/DecompressorGuard 防句柄泄漏
4. Tier 2 LRU 驱逐 — 满时驱逐最旧条目，不再直接拒绝新条目
5. SetViewSize 布局缓存失效 — 窗口 resize 后强制下帧重算，修复 HitTest 点击错位
6. QPF 移到 Initialize — QueryPerformanceFrequency 从每帧调用改为初始化一次
7. 滚动指示器 NaN 防护 — 3 处除零位置加 > 0.01f 守卫
8. RecordFolderVisit 线程安全 — folderProfiles_ 读写加 scanMutex_ 保护
9. LoadFolderProfiles 防御解析 — count 上限 100k + fread 返回值检查

Afterglow v1.5.0 — Unfair Scheduling & Tiered Cache

What's New

借鉴 vivo OriginOS 三大核心技术（不公平调度、双渲染架构、Ledger 内存账本），为 Afterglow 引入 5 项性能优化：

1. 不公平线程调度

Worker 线程根据任务优先级动态设置 OS 线程优先级：可见缩略图解码获得 ABOVE_NORMAL，预取任务降为 BELOW_NORMAL。CPU 繁忙时，可见内容优先调度。

2. 帧预算管理（双渲染架构启发）

内容渲染（缩略图网格）受 12ms 预算约束，Glass 动画覆盖层永远不会被跳过。极端滚动场景下，Tab Bar 等动画始终丝滑。

3. Tier 2 压缩缓存（Ledger 启发）

GPU 缓存驱逐的缩略图不再丢弃，而是压缩到 CPU RAM（XPRESS+Huffman）。再次需要时解压恢复 ~0.3ms，远快于重新磁盘解码 ~5ms。快速来回滚动体验大幅提升。

4. I/O 优先级分层

预取任务进入 THREAD_MODE_BACKGROUND，降低 I/O 和内存优先级，不与可见缩略图争抢磁盘带宽。HDD 用户受益明显。

5. 持久化文件夹访问画像

跨会话记录文件夹访问频率，冷启动时高频相册优先扫描加载。

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Full Changelog: v1.4.0...v1.5.0

Afterglow v1.4.0 — ThreadPool & Architecture Cleanup

What's New

High-Performance ThreadPool

替换所有散装线程管理，统一为自研高性能线程池。

• 3 优先级车道: High / Normal / Low，visible 缩略图走 High 优先解码
• Spin-Yield-Wait 空闲策略: spin 64 次 → _mm_pause yield 256 次 → CV wait，减少 ~90% syscall 开销
• Cache-line 对齐: alignas(64) 防止 false sharing
• 批量提交: SubmitBatch 一次加锁 + notify_all，减少唤醒开销
• 自动线程数: hardware_concurrency() - 1（保留一个核给渲染线程）

ImagePipeline 重构

• 5 个散装线程（1 load + 4 thumbnail workers）→ 1 个统一线程池
• 3 个 mutex（requestMutex_ / visibleMutex_ / queueMutex_）→ 1 个 cacheMutex_
• readyQueue: vector::erase(begin, begin+n) O(n) → deque::pop_front() O(1)
• 消除嵌套锁（requestMutex_ → visibleMutex_）死锁风险

Architecture Cleanup

删除 19 个从未使用的空壳文件（-905 行）：

• D3D12Renderer（D2D 底层已走 D3D11 硬件加速，D3D12 对 2D 查看器无收益）
• TextureManager / MipMapGenerator.cpp / Viewport.cpp（真实代码在 Direct2DRenderer.cpp）
• image_processing 全模块（FilterPipeline, ColorCorrection, SharpenEngine, BatchProcessor, RAWDecoder）
• MainWindow / MetadataPanel（孤儿 UI 空壳）
• CacheManager::TextureCache 类声明
• 去掉 d3d12 链接依赖

Glass Folder Header

文件夹详情页标题从不透明覆盖改为 Liquid Glass 毛玻璃渲染。

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Full Changelog: v1.3.0...v1.4.0

Afterglow v1.3.0 — Album Management & Transition Perf

Album Edit Mode (iOS Jiggle Management)

• Glass 编辑/完成 toggle at top-right of Albums tab
• Per-card sin-wave jiggle: sin(2π × 5Hz × t + φᵢ) × 1.5° with random phase offset, zero spring overhead
• Red − delete badge on every album — spring pop-in (stiffness=600, damping=25)
• Delete flow: badge tap → spring shrink 1→0 (400/30) → RemoveAlbumFolder in-memory surgery → no rescan
• + add card at grid end → folder dialog → StartFullScan
• Escape / tab switch auto-exits edit mode

Zero-Rescan Delete Architecture

hiddenAlbumPaths_.push_back(path) → SaveHiddenAlbums()
lock(scanMutex_) { scannedResults_.erase(remove_if(parent == path)) }  // O(n) single-pass
SetImagesGrouped(results)  // rebuilds Photos + Albums in one call
SaveScanCache(results)     // binary persist, single fwrite

• FilterHiddenAlbums: unordered_set<wstring> construction O(k), per-image lookup O(1), total O(n+k)
• Hidden albums survive rescans and restarts via %LocalAppData%/UltraImageViewer/hidden_albums.txt

Folder Transition Stutter Fix

Root cause: RequestThumbnail performs synchronous ID2D1DeviceContext::CreateBitmap (GPU upload) from persistent cache — up to 200 per frame. During folder-enter transition, RenderFolderDetail hits this path for every visible + prefetch cell on the first frame, causing 30-50ms frame spikes.

Solution — three-part pipeline deconfliction:

1. Fast-scroll override during transition: isFastScrolling_ = true while folderTransitionActive_ — both RenderAlbumsTab and RenderFolderDetail → RenderImageGrid use GetCachedThumbnail only (hash lookup, no GPU work)
2. Album cover fast-path: RenderAlbumsTab now gates RequestThumbnail vs GetCachedThumbnail on isFastScrolling_ — covers are already in memory cache so display is unaffected
3. Decode pre-warming: EnterFolderDetail submits first 40 thumbnail requests before the spring animation starts — worker threads decode in parallel during the ~300ms slide, thumbnails land in readyQueue_ and get flushed on the first steady-state frame

Result: transition frames drop from ~40ms to <4ms. Thumbnails appear instantly when the slide animation completes.

Text Overflow Fix

• albumTitleFormat_ configured with DWRITE_WORD_WRAPPING_NO_WRAP + DWRITE_TRIMMING_GRANULARITY_CHARACTER
• Long album names truncated with ellipsis glyph at card boundary — photo count always visible

Build

• Executable: afterglow.exe (x64, Release, /O2 /GL /LTCG)

Afterglow v1.1.0 — Albums & Smart Filter

What's New

Smart Image Filtering

• Images smaller than 100KB are automatically filtered out (icons, favicons, UI assets)
• Common asset directories are skipped during scanning (icons, thumbnails, sprites, etc.)

iOS-Style Tab Navigation

• Bottom tab bar with Photos and Albums tabs
• Independent scroll state per tab

Albums View

• Folder-based album cards with cover images
• Responsive grid layout — adapts columns to screen width
• Click any album to enter its folder gallery

UI Improvements

• Rounded corner thumbnails and album cards
• Modern spacing and typography
• Fixed header overlay (content scrolls behind headers)
• Pill-shaped back button in folder detail view

Bug Fixes

• Fixed album card click opening viewer instead of folder detail
• Fixed scrolling content overlapping header elements

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Full Changelog: v1.0.0...v1.1.0

Afterglow v1.0.0

Afterglow v1.0.0

The light that lingers after the moment has passed.

Features

• Gallery view with automatic year/month grouping
• Ctrl+D to curate album folders — multiple folders merged into one timeline
• Ctrl+O to open image files
• Drag & drop support
• Direct2D hardware-accelerated rendering with spring animations
• Background async scanning, lazy thumbnail loading
• Album folder list persisted across sessions

Formats

JPG / PNG / BMP / GIF / TIFF / WebP / HEIC / AVIF / ICO / JXR

Download

Grab Afterglow.exe below. Portable — no installation needed.