Public/System/ConvertTo-Image.ps1
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function ConvertTo-Image { [CmdletBinding()] [CmdLetTag()] param ( [parameter(Mandatory,ValueFromPipeline)] [string]$Text, [parameter(Mandatory)] [string]$OutputFile, [int]$Density=1200, [int]$Quality=100, [int]$MaximumSizeBytes, [int]$Width ) begin { $PSCmdlet|Write-PSCmdLetBegin Install-Chocolatey if (!(Get-ChocoPackage imagemagick.app)){ choco install imagemagick.app } $ImageMagick=Get-ChildItem ([System.Environment]::GetFolderPath([System.Environment+SpecialFolder]::ProgramFiles)) "ImageMagick*"|ForEach-Object{ Get-ChildItem $_.FullName magick.exe }|Select-Object -First 1 if (!(Get-ChocoPackage Ghostscript)){ choco install Ghostscript } npm install -g pretty-markdown-pdf|Out-Null } process { $baseName=[System.IO.Path]::GetFileNameWithoutExtension($OutputFile) Push-Location $env:TEMP Remove-Item $baseName -Force -Recurse -ErrorAction SilentlyContinue New-Item $baseName -ItemType Directory Push-Location $baseName $mdFile=".\$baseName.md" Set-Content $mdFile $Text [PSCustomObject]@{ width = $Width margin = "1cm" quality = $Quality omitBackground =$true highlight =$true includeDefaultStyles=$false }|ConvertTo-Json|Set-Content ".\$basename.json" Invoke-Script{pretty-md-pdf -i $mdFile -c ".\$basename.json"} $pdfName=".\$baseName.pdf" do { $jpgName=[guid]::NewGuid() Invoke-Script{& $ImageMagick -density $Density -quality $Quality $pdfName .\$jpgName.jpg } if ($Width){ $bmp=[System.Drawing.Bitmap]::new((Get-Item .\$jpgName.jpg).FullName) if ($bmp.Width -gt $Width){ Invoke-Script{& $ImageMagick .\$jpgName.jpg -resize $Width ".\$jpgName.resized.jpg"} $jpgName="$jpgName.resized" } } Invoke-Script{& $ImageMagick .\$jpgName.jpg -flatten -fuzz 1% -trim +repage ".\$jpgName.trim.jpg" } $jpgName="$jpgName.trim" Invoke-Script{ & $ImageMagick ".\$jpgName.jpg" -border 2%x2% $OutputFile } $Density=0.9*$Density $Quality=0.9*$Quality } until (!$MaximumSizeBytes -or (([System.IO.File]::ReadAllBytes($OutputFile)).Length -lt $MaximumSizeBytes)) Pop-Location Pop-Location } end { } } |