Convert file to TGBRABitmap and back to file
lazarus / 43-Android

----------------------------------------------------------------------
biologic · 2025-08-23 05:55

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 · 2025-08-23 13:07

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 · 2025-08-23 14:00

I have this code for step 1:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i bmploaded:=
true;ImageView1.SetImageBitmap(ImageFileManager1.LoadFromUri(treeUri))
;bmp := TBGRABitmap.Create(ImageView1.GetWidth, ImageView1.GetHeight);
filename:=self.GetFileNameByUri(IntentManager1.GetDataUri(intentData))
;// load jbitmap1 with bitmap from urijBitmap1:=
self.GetBitmapFromUri(treeUri);// jbitmap -> TBGRABitmap // how to do
?  Is this a good method ?

----------------------------------------------------------------------
biologic · 2025-08-23 14:40

Nevermind,

I found a solution in ChapGPT.