江晨
096e5af69b
- tools/repair-ico.ps1: 检测并修复 ICO 帧偏移量未计目录长度的损坏模式 - assets/dsh.ico: 已修复（原文件偏移全错，.NET Icon 无法加载） - tools/dsh-app.ps1: 归档加固版托盘脚本（图标加载兜底） - tools/dsh-app.ps1.README.md: 修复记录 + UTF-8 BOM 踩坑
48 lines
2.0 KiB
PowerShell
48 lines
2.0 KiB
PowerShell
# repair-ico.ps1 - Fix broken ICO files whose frame offsets omit the directory size.
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#
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# Background: some generators write ICO frame offsets starting at 0 (not accounting
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# for the 6 + count*16 directory), which makes .NET Framework System.Drawing.Icon
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# throw "The operation completed successfully". This script detects that pattern
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# and adds the directory length to every frame offset.
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#
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# Usage: powershell -NoProfile -ExecutionPolicy Bypass -File repair-ico.ps1 <file.ico> [more.ico ...]
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# Each file is backed up as <file>.bak-<timestamp> before being rewritten.
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param([Parameter(Mandatory=$true, Position=0)][string]$IcoPath)
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Add-Type -AssemblyName System.Drawing
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foreach ($path in @($IcoPath)) {
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$full = (Resolve-Path $path -ErrorAction SilentlyContinue).Path
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if (-not $full -or -not (Test-Path $full)) { Write-Host "SKIP (not found): $path"; continue }
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$bytes = [System.IO.File]::ReadAllBytes($full)
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if ($bytes.Length -lt 22) { Write-Host "SKIP (too small): $path"; continue }
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$count = [BitConverter]::ToUInt16($bytes, 4)
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if ($count -lt 1 -or $count -gt 64) { Write-Host "SKIP (odd frame count $count): $path"; continue }
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$dirLen = 6 + $count * 16
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# Detect the broken pattern: first frame offset is 0 (points at the directory itself)
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$off0 = [BitConverter]::ToUInt32($bytes, 6 + 12)
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if ($off0 -ne 0) { Write-Host "OK (first offset=$off0, no fix needed): $path"; continue }
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$stamp = Get-Date -Format 'yyyyMMdd-HHmmss'
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$bak = "$full.bak-$stamp"
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Copy-Item $full $bak -Force
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$b = [byte[]]$bytes.Clone()
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for ($i = 0; $i -lt $count; $i++) {
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$o = 6 + $i * 16 + 12
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$v = [BitConverter]::ToUInt32($b, $o) + $dirLen
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[BitConverter]::GetBytes($v).CopyTo($b, $o)
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}
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[System.IO.File]::WriteAllBytes($full, $b)
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try {
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$ic = [System.Drawing.Icon]::new($full)
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$ok = "OK $($ic.Width)x$($ic.Height)"
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$ic.Dispose()
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} catch { $ok = "STILL FAILS: $($_.Exception.InnerException.Message)" }
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Write-Host "FIXED: $full (backup $bak) verify: $ok"
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}
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