Convert file to TGBRABitmap and back to file

[biologic]

These are the steps I want to do :

Load button
__________
file (uri) ----> jBitmap ----> TBGRABitmap

Convert button
____________
---> do pixels change to gray/sepia on TBGRABitmap pixels

Save button
__________
----> jBitmap ----> file (png or other format)

How to do this ?

[biologic]

I will do step 1.

How do I load a a file in a jBitmap ?

This file is identified with a treeUri, from a loadfile dialog.

Thanks.

[biologic]

I have this code for step 1:

Code: Pascal  [Select][+][-]

1. bmploaded:=true;
2. ImageView1.SetImageBitmap(ImageFileManager1.LoadFromUri(treeUri));
3. bmp := TBGRABitmap.Create(ImageView1.GetWidth, ImageView1.GetHeight);
4. filename:=self.GetFileNameByUri(IntentManager1.GetDataUri(intentData));
5. // load jbitmap1 with bitmap from uri
6. jBitmap1:= self.GetBitmapFromUri(treeUri);
7. // jbitmap -> TBGRABitmap // how to do ?
8.  

Is this a good method ?

[biologic]

Nevermind,

I found a solution in ChapGPT.