[Gambas-user] Loading Picture/Image from String/Byte[] data

[Benoît Minisini]

Le 06/01/2018 à 10:54, Patrik Karlsson a écrit :
> Hi there!
> 
> I have been away from Gambas for a while but now I'm looking into a 
> gambas client to a java server.
> The goal is to restore a binary file (image) which is base64 encoded and 
> serialized to json.
> 
> I can load the image in the Gambas Client if I first store the file 
> content and load it as usual,
> but I would like to avoid generating a temp file and read it directly 
> since I already have its content loaded.
> 
> Is it possible to load a Picture/Image from String/Byte[] data that 
> represents a file?
> 
> Option 1 below works, but I would like to use something that does not 
> include generating a file.
> Option 2 is me poking around without any success.
> 
> Public Sub Button1_Click()
> 
>    Dim javaGeneratedBase64EncodedImageFile As String
>    Dim decodedBase64 As String
>    Dim tempImagePath As String = Temp()
>    Dim fileByteArray As Byte[]
>    Dim i As Integer
>    Dim p As Pointer
>    Dim hFile As File
> 
>    javaGeneratedBase64EncodedImageFile = File.Load("/home/pata/base64.txt")
>    decodedBase64 = UnBase64(javaGeneratedBase64EncodedImageFile)
>    fileByteArray = Byte[].FromString(decodedBase64)
>    Print tempImagePath
>    ' option 1
>    File.Save(tempImagePath, decodedBase64)
>    PictureBox1.Picture = Picture.Load(tempImagePath)
> 
>    ' option 2
>    p = VarPtr(decodedBase64)
>    hFile = Open Memory p For Read
> 
>    Close #hFile
>    ' end of option 2
> 
>    For i = 0 To fileByteArray.Length - 1
>      'Print fileByteArray[i]
>    Next
> 
>    Print fileByteArray.Length
>    Print Now
> 
> End
> 

I can add some methods to the Image and/or Picture class for that.

-- 
Benoît Minisini