Il modo migliore per timbrare un'immagine con un'altra immagine per creare una filigrana in ASP.NET?
Domanda
Qualcuno lo sa? Vuoi essere in grado di timbrare al volo un'immagine con un'altra immagine come filigrana, anche per fare grandi lotti. Qualsiasi tipo di libreria esistente o una tecnica che conosci sarebbe fantastica.
Soluzione
Questo risponderà alla tua domanda:
http://www.codeproject.com/KB/GDI-plus/ watermark.aspx
Buona fortuna!
Altri suggerimenti
Ho avuto fortuna con ImageMagick . Ha anche una API per .NET .
ecco il mio articolo completo: http://forums.asp.net/p /1323176/2634923.aspx
usa il prompt dei comandi dell'SDK e naviga nella cartella attiva fino alla cartella contenente il codice sorgente sottostante ... quindi compila il codice usando
vbc.exe watermark.vb /t:exe /out:watermark.exe
questo creerà un exe nella cartella .. l'exe accetta due parametri: es.
watermark.exe "c:\source folder" "c:\destination folder"
questo eseguirà l'iterazione attraverso la cartella principale e tutte sottocartelle. tutti i jpeg trovati verranno filigranati con l'immagine specificata nel codice e copiati nella cartella di destinazione. L'immagine originale rimarrà intatta.
// watermark.vb -
Imports System
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Imports System.IO
Namespace WatermarkManager
Class Watermark
Shared sourceDirectory As String = "", destinationDirectory As String = ""
Overloads Shared Sub Main(ByVal args() As String)
'See if an argument was passed from the command line
If args.Length = 2 Then
sourceDirectory = args(0)
destinationDirectory = args(1)
' make sure sourceFolder is legit
If Directory.Exists(sourceDirectory) = False
TerminateExe("Invalid source folder. Folder does not exist.")
Exit Sub
End If
' try and create destination folder
Try
Directory.CreateDirectory(destinationDirectory)
Catch
TerminateExe("Error creating destination folder. Invalid path cannot be created.")
Exit Sub
End Try
' start the magic
CreateHierarchy(sourceDirectory,destinationDirectory)
ElseIf args.Length = 1
If args(0) = "/?"
DisplayHelp()
Else
TerminateExe("expected: watermark.exe [source path] [destination path]")
End If
Exit Sub
Else
TerminateExe("expected: watermark.exe [source path] [destination path]")
Exit Sub
End If
TerminateExe()
End Sub
Shared Sub CreateHierarchy(ByVal sourceDirectory As String, ByVal destinationDirectory As String)
Dim tmpSourceDirectory As String = sourceDirectory
' copy directory hierarchy to destination folder
For Each Item As String In Directory.GetDirectories(sourceDirectory)
Directory.CreateDirectory(destinationDirectory + Item.SubString(Item.LastIndexOf("\")))
If hasSubDirectories(Item)
CreateSubDirectories(Item)
End If
Next
' reset destinationDirectory
destinationDirectory = tmpSourceDirectory
' now that folder structure is set up, let's iterate through files
For Each Item As String In Directory.GetDirectories(sourceDirectory)
SearchDirectory(Item)
Next
End Sub
Shared Function hasSubDirectories(ByVal path As String) As Boolean
Dim subdirs() As String = Directory.GetDirectories(path)
If subdirs.Length > 0
Return True
End If
Return False
End Function
Shared Sub CheckFiles(ByVal path As String)
For Each f As String In Directory.GetFiles(path)
If f.SubString(f.Length-3).ToLower = "jpg"
WatermarkImage(f)
End If
Next
End Sub
Shared Sub WatermarkImage(ByVal f As String)
Dim img As System.Drawing.Image = System.Drawing.Image.FromFile(f)
Dim graphic As Graphics
Dim indexedImage As New Bitmap(img)
graphic = Graphics.FromImage(indexedImage)
graphic.DrawImage(img, 0, 0, img.Width, img.Height)
img = indexedImage
graphic.SmoothingMode = SmoothingMode.AntiAlias
graphic.InterpolationMode = InterpolationMode.HighQualityBicubic
Dim x As Integer, y As Integer
Dim source As New Bitmap("c:\watermark.png")
Dim logo As New Bitmap(source, CInt(img.Width / 3), CInt(img.Width / 3))
source.Dispose()
x = img.Width - logo.Width
y = img.Height - logo.Height
graphic.DrawImage(logo, New Point(x,y))
logo.Dispose()
img.Save(destinationDirectory+f.SubString(f.LastIndexOf("\")), ImageFormat.Jpeg)
indexedImage.Dispose()
img.Dispose()
graphic.Dispose()
Console.WriteLine("successfully watermarked " + f.SubString(f.LastIndexOf("\")+1))
Console.WriteLine("saved to: " + vbCrLf + destinationDirectory + vbCrLf)
End Sub
Shared Sub SearchDirectory(ByVal path As String)
destinationDirectory = destinationDirectory + path.SubString(path.LastIndexOf("\"))
CheckFiles(path)
For Each Item As String In Directory.GetDirectories(path)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
CheckFiles(Item)
If hasSubDirectories(Item)
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
SearchDirectory(Item)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
End If
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
Next
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
End Sub
Shared Sub CreateSubDirectories(ByVal path As String)
destinationDirectory = destinationDirectory + path.SubString(path.LastIndexOf("\"))
For Each Item As String In Directory.GetDirectories(path)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
Directory.CreateDirectory(destinationDirectory)
Console.WriteLine(vbCrlf + "created: " + vbCrlf + destinationDirectory)
If hasSubDirectories(Item)
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
CreateSubDirectories(Item)
destinationDirectory += Item.SubString(Item.LastIndexOf("\"))
End If
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
Next
destinationDirectory = destinationDirectory.SubString(0,destinationDirectory.LastIndexOf("\"))
End Sub
Shared Sub TerminateExe(ByVal Optional msg As String = "")
If msg ""
Console.WriteLine(vbCrLf + "AN ERROR HAS OCCURRED //" + vbCrLf + msg)
End If
Console.WriteLine(vbCrLf + "Press [enter] to close...")
'Console.Read()
End Sub
Shared Sub DisplayHelp()
Console.WriteLine("watermark.exe accepts two parameters:" + vbCrLf + " - [source folder]")
Console.WriteLine(" - [destination folder]")
Console.WriteLine("ex." + vbCrLf + "watermark.exe ""c:\web_projects\dclr source"" ""d:\new_dclr\copy1 dest""")
Console.WriteLine(vbCrLf + "Press [enter] to close...")
Console.Read()
End Sub
End Class
End Namespace