Android Question Save only the image inside the panel?!

[Matteo Granatiero]

I need to save the image that appears only inside the panel as in the image. Thanks in advance

 

[Erel]

Is this a transparent panel?

 

[Star-Dust]

Try this:

Sub Crop_Image(V As B4XView, left As Int, top As Int, width As Int, height As Int) As Bitmap
    Dim Btm As Bitmap = V.Snapshot
    Dim Canv As Canvas
    Dim MyBitmap As Bitmap
  
    MyBitmap.InitializeMutable(width,height)
    Canv.Initialize2(MyBitmap)
  
    Dim R As Rect
    R.Initialize(left,top,width,height)
    Dim R2 As TextReader
    R2.Initialize(0,0,width,height)
    Canv.DrawBitmap(Btm,R,R2)
  
    Return Canv.Bitmap
End Sub

This code imports the background image of the view and cuts the square indicated by the coordinates (left, top, width, height) and returns the resulting bitmap

 

[Erel]

Why not:

Sub Crop_Image(V As B4XView, left As Int, top As Int, width As Int, height As Int) As Bitmap
Return V.Snapshot.Crop(left, top, width, height)
End Sub

 

[Matteo Granatiero]

Try this:

Sub Crop_Image(V As B4XView, left As Int, top As Int, width As Int, height As Int) As Bitmap
    Dim Btm As Bitmap = V.Snapshot
    Dim Canv As Canvas
    Dim MyBitmap As Bitmap
 
    MyBitmap.InitializeMutable(width,height)
    Canv.Initialize2(MyBitmap)
 
    Dim R As Rect
    R.Initialize(left,top,width,height)
    Dim R2 As TextReader
    R2.Initialize(0,0,width,height)
    Canv.DrawBitmap(Btm,R,R2)
 
    Return Canv.Bitmap
End Sub

This code imports the background image of the view and cuts the square indicated by the coordinates (left, top, width, height) and returns the resulting bitmap

if I wanted to do this kind of clipping?

 

[Matteo Granatiero]

Why not:

Sub Crop_Image(V As B4XView, left As Int, top As Int, width As Int, height As Int) As Bitmap
Return V.Snapshot.Crop(left, top, width, height)
End Sub

if I wanted to do this kind of clipping?

 

[Star-Dust]

Use the Path to select the part and cut out with canvas.

Is the figure cut out manually or do you have pre-established shapes?

 

[Matteo Granatiero]

Use the Path to select the part and cut out with canvas.

Is the figure cut out manually or do you have pre-established shapes?

pre-established shapes! can you make me an example directly? because I really can not do it
I enclose the pre-established form

 

[Star-Dust]

pre-established shapes! can you make me an example directly? because I really can not do it
I enclose the pre-established form

I'm off-site I'm sorry I can not now

 

[Matteo Granatiero]

I'm off-site I'm sorry I can not now

even in the day if you can. thank you so much

 

[Star-Dust]

First example: Freehand image cropping.

Sub ButtonCut_Click
    Dim Canv As Canvas
    
    Canv.Initialize(PanelMain)
    Canv.DrawColor(Colors.Transparent)
    
    Dim P As Path
    P.Initialize(Point(0).X,Point(0).Y)
    
    For i=1 To Point.Length-1
        P.LineTo(Point(i).X,Point(i).Y)
    Next
    Canv.ClipPath(P)
    
    Dim r As Rect
    r.Initialize(0,0,PanelMain.Width,PanelMain.Height)
    Canv.DrawBitmap(LoadBitmap(File.DirAssets,"cavallo_0.jpg"),Null,r)
End Sub

 

[Matteo Granatiero]

First example: Freehand image cropping.
View attachment 67180

Sub ButtonCut_Click
    Dim Canv As Canvas
  
    Canv.Initialize(PanelMain)
    Canv.DrawColor(Colors.Transparent)
  
    Dim P As Path
    P.Initialize(Point(0).X,Point(0).Y)
  
    For i=1 To Point.Length-1
        P.LineTo(Point(i).X,Point(i).Y)
    Next
    Canv.ClipPath(P)
  
    Dim r As Rect
    r.Initialize(0,0,PanelMain.Width,PanelMain.Height)
    Canv.DrawBitmap(LoadBitmap(File.DirAssets,"cavallo_0.jpg"),Null,r)
End Sub

my problem is not the clipping with the fingers, but the cropping through a pre-set image as in the example I want to cut out only what is inside the t-shirt

 

[Star-Dust]

my problem is not the clipping with the fingers, but the cropping through a pre-set image as in the example I want to cut out only what is inside the t-shirt

Yes, I understand, but in the meantime I have to do my job too.
You work too

This was easier to do. I'll have the rest when I can. Please note that the exterior of the preset images must have a black background (or any other color you have set)
As soon as I can tyi, I'll set an example for lunch now

 

[Matteo Granatiero]

Yes, I understand, but in the meantime I have to do my job too.
You work too

This was easier to do. I'll have the rest when I can. Please note that the exterior of the preset images must have a black background (or any other color you have set)
As soon as I can tyi, I'll set an example for lunch now

yes, obviously the t shirt will have only the transparent inside and the rest outside with a dark background. Okay, I'm waiting for your example in the day. Thanks so much

 

[Star-Dust]

See this example. I will not give you any more help because I have seen that this question you have asked many times in the forum. (Here1 and Here2)

Be satisfied with this.

 

[Matteo Granatiero]

See this example. I will not give you any more help because I have seen that this question you have asked many times in the forum. (Here1 and Here2)

Be satisfied with this.

View attachment 67189

Thaaaaankssssss

 

[Star-Dust]

The best thing would be to recharge the points of the path from the frame and apply it to the photo.

To do this you have to create an algorithm that from the frame image you earn points, in itself it is not impossible and I have got at least 2 interesting ideas, but ... they would take time and if I did an algorithm like that I would keep it for myself .