iOS Question (Solved) Flip horizontal ImageView - LLCamera

f0raster0 · Apr 27, 2025

Hi Team

How can I flip the image so that it appears the same as when taking a picture with the front camera?
I'm using this example:

LLCamera - Low level camera access

iMedia library v1.10 includes a new type of object named LLCamera. LLCamera provides low level camera access, similar to B4A Camera library. If you just want to allow the user to take a picture then it will probably be better to use Camera instead of LLCamera. LLCamera allows you to embed the...

www.b4x.com

B4X:

Private Sub llc_PictureTaken (Data() As Byte)
    If Data.Length = 0 Then Return
    Dim In As InputStream
    In.InitializeFromBytesArray(Data, 0, Data.Length)
    Dim bmp As Bitmap
    bmp.Initialize2(In)
    In.Close
    ImageView1.Bitmap = bmp
    Log("Image size: " & bmp.Width & "x" & bmp.Height)
End Sub

Thank you in advance

f0raster0 · Apr 27, 2025

Using BitmapCreatorEfects link library here
it flip and matches phone camera preview , but the image is now rotated vertically

B4X:

Private Sub llc_PictureTaken(Data() As Byte) ' OK flip matches phone camera preview, but the image is now rotated vertically
    If Data.Length = 0 Then Return

    Dim In As InputStream
    In.InitializeFromBytesArray(Data, 0, Data.Length)
    Dim bmp As Bitmap
    bmp.Initialize2(In)
    In.Close

    Log("Image size: " & bmp.Width & "x" & bmp.Height)
    
    If bmCEf.IsInitialized = False Then
        bmCEf.Initialize
    End If

    Dim flippedBmp As B4XBitmap = bmCEf.FlipHorizontal(bmp)
    If flippedBmp.IsInitialized Then
        ImageView1.Bitmap = flippedBmp
        Log("Flipped image set...

hatzisn · Apr 27, 2025

How about BitmapCreatorEffects?

f0raster0 · Apr 27, 2025

Using BitmapCreatorEfects link library here
it flip and matches phone camera preview , but the image is now rotated vertically

B4X:

Private Sub llc_PictureTaken(Data() As Byte) ' OK flip matches phone camera preview, but the image is now rotated vertically
    If Data.Length = 0 Then Return

    Dim In As InputStream
    In.InitializeFromBytesArray(Data, 0, Data.Length)
    Dim bmp As Bitmap
    bmp.Initialize2(In)
    In.Close

    Log("Image size: " & bmp.Width & "x" & bmp.Height)
    
    If bmCEf.IsInitialized = False Then
        bmCEf.Initialize
    End If

    Dim flippedBmp As B4XBitmap = bmCEf.FlipHorizontal(bmp)
    If flippedBmp.IsInitialized Then
        ImageView1.Bitmap = flippedBmp
        Log("Flipped image set successfully.")
    Else
        Log("Failed to flip image.")
    End If
End Sub

hatzisn · Apr 27, 2025

f0raster0 said:

Using BitmapCreatorEfects link library here
it flip and matches phone camera preview , but the image is now rotated vertically

B4X:

Private Sub llc_PictureTaken(Data() As Byte) ' OK flip matches phone camera preview, but the image is now rotated vertically
    If Data.Length = 0 Then Return

    Dim In As InputStream
    In.InitializeFromBytesArray(Data, 0, Data.Length)
    Dim bmp As Bitmap
    bmp.Initialize2(In)
    In.Close

    Log("Image size: " & bmp.Width & "x" & bmp.Height)
   
    If bmCEf.IsInitialized = False Then
        bmCEf.Initialize
    End If

    Dim flippedBmp As B4XBitmap = bmCEf.FlipHorizontal(bmp)
    If flippedBmp.IsInitialized Then
        ImageView1.Bitmap = flippedBmp
        Log("Flipped image set successfully.")
    Else
        Log("Failed to flip image.")
    End If
End Sub

Sorry I pressed the upvote button accidentally in the phone. I cannot understand what might be wrong... Maybe @Erel would be the most suitable to answer this.

f0raster0 · Apr 27, 2025

hatzisn said:
Sorry I pressed the upvote button accidentally in the phone. I cannot understand what might be wrong... Maybe @Erel would be the most suitable to answer this.

thanks, yes your iddea about the library BitMapCreatorEffects helped me to solve the issue about flipping the camera..then solved that question.
Topic solved.

iOS Question (Solved) Flip horizontal ImageView - LLCamera

f0raster0

Well-Known Member

LLCamera - Low level camera access

f0raster0

hatzisn

Expert

f0raster0

Well-Known Member

hatzisn

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f0raster0

Well-Known Member

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