Android Question Flip image with SimpleMediaManager

[angel_]

I am using SimpleMediaManager and it works great, how can I flip an image after loading with SetMediaFromFile? I am using a temporary file there is another alternative (for B4A and B4i).

I have this code:

Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
    
    MediaManager.Initialize
End Sub

Private Sub Button1_Click
    MediaManager.SetMediaFromFile(Panel1, File.DirAssets, "img.png", "image/*", Null)
End Sub

Private Sub Button2_Click
    FlipHorizontal
End Sub

Private Sub FlipHorizontal
    Dim bmp As B4XBitmap
    Dim bmp_flip As B4XBitmap
    Dim effect As BitmapCreatorEffects
    
    bmp = Panel1.Snapshot
    
    effect.Initialize
    bmp_flip = effect.FlipHorizontal(bmp)
    
    Dim Out As OutputStream
    Out = File.OpenOutput(xui.DefaultFolder, "TempFlip.png", False)
    bmp_flip.WriteToStream(Out, 100, "PNG")
    Out.Close
    
    MediaManager.SetMediaFromFile(Panel1,xui.DefaultFolder, "TempFlip.png", "image/*", Null)
End Sub

 

[Erel]

Another option is to flip the bitmap and use smm.AddLocalMedia. This will allow you to add it without saving the file. It will however create a permanent media, which means that it will not be cleared from the cache.

 

[angel_]

It works fine but the image is blurry in B4i:

    MediaManager.AddLocalMedia(TempFlip, bmp_flip, "image/*")
    MediaManager.SetMedia(Panel1, TempFlip)

 

[Erel]

It isn't related to SMM. Use the latest version of BitmapCreatorEffects and set ScaleDownImages to False: https://www.b4x.com/android/forum/threads/b4x-bitmapcreator-effects.93608/#content

 

[angel_]

The panel is seen with a white background while the image is loading (there are many), is it possible that this panel is seen with a transparent background?, the color of the panel and smm has already been indicated with a white background

 

[Erel]

Yes, please start a new thread and I'll explain.

 

[angel_]

The panel is seen with a white background while the image is loading (there are many), is it possible that this panel is seen with a transparent background?, the color of the panel and smm has already been indicated with a white background

MediaManager.DefaultLoadingRequest.Extra.Put(MediaManager.REQUEST_BACKGROUND, xui.Color_Transparent)

 

[angel_]

It isn't related to SMM. Use the latest version of BitmapCreatorEffects and set ScaleDownImages to False: https://www.b4x.com/android/forum/threads/b4x-bitmapcreator-effects.93608/#content

I still get the flipped image blurry, I have this code:

    Dim MM As SimpleMediaManager = B4XPages.MainPage.MediaManager
    Dim FlipTemporal As String = "TempFlip.png"
    Dim bmp As B4XBitmap = pnl_img.Snapshot
    Dim bmp_flip As B4XBitmap
    Dim effect As BitmapCreatorEffects
    Dim bmp_scaled As B4XBitmap
    
    effect .Initialize
    effect .ScaleDownImages = False
    bmp_flip = effect .FlipHorizontal(bmp)
    bmp_scaled = bmp_volteado.Resize(bmp_flip.Width * effect .ImageScale, bmp_flip.Height * effect .ImageScale, True)
    
    MM.AddLocalMedia(FlipTemporal, bmp_scaled, "image/*")
    MM.SetMedia(pnl_img, FlipTemporal)

 

[Erel]

Please upload the project, with the B4i code (see your other thread for correct way to create the zip).

 

[angel_]

I was creating the example and it seems to me this error:

B4i line: 99
sm.CustomView.As(WebView).LoadUrl(Media.Media)
expected expression

 

[Erel]

It compiles fine here.
The image is very small - 68x45.

 

[angel_]

It compiles fine here.
The image is very small - 68x45.

Can you try this image (in B4i) ?, I can't upload the whole zip because of the size

 

[Erel]

The image quality is lost when you call Panel.Snapshot as the panel is smaller than the original bitmap.

You should instead access the B4XImageView that was added to the panel:

bmp = Panel1.GetView(0).Tag.As(B4XImageView).Bitmap