ResizeImageModule.psm1
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function Resize-Image { <# .SYNOPSIS Resize-Image resizes an image file. .DESCRIPTION This function uses the native .NET API to resize an image file and save it to a file. It supports the following image formats: BMP, GIF, JPEG, PNG, TIFF .PARAMETER InputFile Type [string] The parameter InputFile is used to define the value of image name or path to resize. .PARAMETER OutputFile Type [string] The parameter OutputFile is used to define the value of output image resize. .PARAMETER Width Type [int32] The parameter Width is used to define the value of new width to image. .PARAMETER Height Type [int32] The parameter Height is used to define the value of new height to image. .PARAMETER ProportionalResize Type [bool] The optional parameter ProportionalResize is used to define if execute proportional resize. .EXAMPLE Resize-Image -InputFile "C:/image.png" -OutputFile "C:/image2.png" -Width 300 -Height 300 .NOTES Author: Ronildo Souza Last Edit: 2018-10-09 Version 1.0.0 - initial release Version 1.0.1 - add proportional resize #> [CmdletBinding()] Param( [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [string]$InputFile, [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [string]$OutputFile, [Parameter(Mandatory = $true)] [int32]$Width, [Parameter(Mandatory = $true)] [int32]$Height, [Parameter(Mandatory = $false)] [bool]$ProportionalResize = $true) # Add assemblies Add-Type -AssemblyName System Add-Type -AssemblyName System.Drawing $image = [System.Drawing.Image]::FromFile((Get-Item $InputFile)) $ratioX = $Width / $image.Width; $ratioY = $Height / $image.Height; $ratio = [System.Math]::Min($ratioX, $ratioY); [int32]$newWidth = If ($ProportionalResize) { $image.Width * $ratio } Else { $Width } [int32]$newHeight = If ($ProportionalResize) { $image.Height * $ratio } Else { $Height } $destImage = New-Object System.Drawing.Bitmap($newWidth, $newHeight) # Draw new image on the empty canvas $graphics = [System.Drawing.Graphics]::FromImage($destImage) $graphics.DrawImage($image, 0, 0, $newWidth, $newHeight) $graphics.Dispose() # Save the image $destImage.Save($OutputFile) } function Resize-ImagesInFolder { <# .SYNOPSIS Resize-ImagesInFolder resizes an image files in folder. .DESCRIPTION This function uses the native .NET API to resize an image file and save it to a file. It supports the following image formats: BMP, GIF, JPEG, PNG, TIFF .PARAMETER Width Type [int32] The parameter Width is used to define the value of new width to image. .PARAMETER Height Type [int32] The parameter Height is used to define the value of new height to image. .PARAMETER FolderPath Type [string] The optional parameter FolderPath is used to define the value of image files folder path. .PARAMETER ProportionalResize Type [bool] The optional parameter ProportionalResize is used to define if execute proportional resize. .EXAMPLE Resize-ImagesInFolder -Width 300 -Height 300 [-FolderPath] .NOTES Author: Ronildo Souza Last Edit: 2018-10-09 Version 1.0.0 - initial release Version 1.0.1 - add proportional resize #> [CmdletBinding()] Param( [Parameter(Mandatory = $true)][int32]$Width, [Parameter(Mandatory = $true)][int32]$Height, [Parameter(Mandatory = $false)] [string]$FolderPath = "", [Parameter(Mandatory = $false)] [bool]$ProportionalResize = $true) $imageList = Get-ChildItem -Path $FolderPath | Where-Object {$_.Extension -in (".png", ".jpg", ".jpeg", ".bmp", ".gif", ".tiff")} if ($imageList.Length -gt 0) { foreach ($image in $imageList) { $pathWindowsTemp = $env:SystemRoot + "\temp\pictures-rim_ps\" $extension = $image.Extension $imageInputFullName = $image.FullName $imageInputBaseName = $image.BaseName $imageOutput = $FolderPath + "\" + $imageInputBaseName + "_RESIZE-RIM_PS" + $extension $imageInput = $pathWindowsTemp + $imageInputBaseName + $extension $imageNameBKP = $FolderPath + "\" + $imageInputBaseName + $extension + ".bkp" # Create temp folder and image file copy New-Item -ItemType Directory -Path $pathWindowsTemp -Force Copy-Item $imageInputFullName $pathWindowsTemp -Force # Create backup image file if (!(Test-Path "$imageNameBKP" -PathType Leaf)) { Rename-Item -Path "$imageInputFullName" -NewName "$imageNameBKP" -Force } # Resize the current image file of loop Resize-Image -InputFile "$imageInput" -OutputFile "$imageOutput" -Width $Width -Height $Height -ProportionalResize $ProportionalResize # "Rename" item with override $Destination = Join-Path -Path $image.Directory.FullName -ChildPath "$imageInputBaseName$extension" Move-Item -Path $imageOutput -Destination $Destination -Force Write-Output $image.Name } Read-Host -Prompt "Success Resize!" Exit-PSHostProcess } else { Write-Error "*** Folder not contain image files! ***" } } Export-ModuleMember -Function Resize-Image, ` Resize-ImagesInFolder |