¿La mejor manera de imprimir una imagen con otra imagen para crear una marca de agua en ASP.NET?

graphics watermark

Question

¿Nadie sabe? Desea poder sobreponer una imagen con otra imagen como marca de agua, también para hacer grandes lotes. Cualquier tipo de biblioteca existente o una técnica que conozcas sería genial.

Answer 1

Esto responderá a tu pregunta:

http://www.codeproject.com/KB/GDI-plus/watermark.aspx

¡Buena suerte!

Answer 2

He tenido buena suerte con ImageMagick . También tiene una API para .NET .

Answer 3

aquí está mi artículo completo: http://forums.asp.net/p/1323176/2634923.aspx

use el Símbolo del sistema SDK y navegue por la carpeta activa hasta la carpeta que contiene el código fuente siguiente ... luego compile el código usando

vbc.exe watermark.vb /t:exe /out:watermark.exe

esto creará un exe en la carpeta ... el exe acepta dos parámetros: ej.

watermark.exe "c:/source folder" "c:/destination folder"

esto iterará a través de la carpeta principal y todas las subcarpetas. todos los jpegs encontrados se marcarán con una marca de agua con la imagen que especifique en el código y se copiarán en la carpeta de destino. La imagen original permanecerá intacta.

// 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