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[CLOSED] BGRABitmap Free
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Author
Topic: [CLOSED] BGRABitmap Free (Read 2811 times)
pcurtis
Hero Member
Posts: 951
[CLOSED] BGRABitmap Free
«
on:
January 25, 2022, 05:11:03 pm »
When I do this
Code: Pascal
[Select]
[+]
[-]
procedure
TfrmMain
.
btnOKClick
(
Sender
:
TObject
)
;
var
MyImage
:
TBGRABitmap
;
begin
MyImage
:
=
TBGRABitmap
.
Create
;
MyImage
.
LoadFromFile
(
'1.bmp'
)
;
Image1
.
Picture
.
Bitmap
:
=
MyImage
.
Bitmap
;
MyImage
.
Free
;
end
;
When MyImage is freed the Imagebox shows a black square. With a TBitmap it works fine.
Am I missing something?
«
Last Edit: January 25, 2022, 11:06:17 pm by pcurtis
»
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
Josh
Hero Member
Posts: 1274
Re: BGRABitmap Free
«
Reply #1 on:
January 25, 2022, 06:46:12 pm »
hi try to update image1, before you free MyImage
Code: Pascal
[Select]
[+]
[-]
MyImage
:
=
TBGRABitmap
.
Create
(
'1.bmp'
)
;
// MyImage.LoadFromFile('1.bmp');
Image1
.
Picture
.
Bitmap
:
=
MyImage
.
Bitmap
;
Image1
.
Update
;
MyImage
.
Free
;
Logged
The best way to get accurate information on the forum is to post something wrong and wait for corrections.
pcurtis
Hero Member
Posts: 951
Re: BGRABitmap Free
«
Reply #2 on:
January 25, 2022, 06:59:52 pm »
OK Thanks that works, but with tbitmap I don't need it. Why?
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
winni
Hero Member
Posts: 3197
Re: BGRABitmap Free
«
Reply #3 on:
January 25, 2022, 09:21:37 pm »
Hi!
This is a problem of the widget set.
With linux / gtk2 it is not necessary.
Winni
Logged
pcurtis
Hero Member
Posts: 951
Re: BGRABitmap Free
«
Reply #4 on:
January 25, 2022, 11:05:09 pm »
Enough said.
Built for *nix, pray it works on other OS's.
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
winni
Hero Member
Posts: 3197
Re: [CLOSED] BGRABitmap Free
«
Reply #5 on:
January 25, 2022, 11:26:27 pm »
Hi!
Just do it how it is shown in the tutorials:
https://wiki.freepascal.org/BGRABitmap_tutorial
I pray for nothing.
But that is the correct way to use it:
Code: Pascal
[Select]
[+]
[-]
MyImage
.
Draw
(
Image1
.
Canvas
,
0
,
0
)
;
MyImage
.
free
;
Winni
Logged
pcurtis
Hero Member
Posts: 951
Re: [CLOSED] BGRABitmap Free
«
Reply #6 on:
January 25, 2022, 11:56:59 pm »
So how do you use center, stretch, proportional properties of TImage?
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
winni
Hero Member
Posts: 3197
Re: [CLOSED] BGRABitmap Free
«
Reply #7 on:
January 26, 2022, 12:02:13 am »
Hi!
If your google is broken then use the "search" option of this forum.
Winni
Logged
pcurtis
Hero Member
Posts: 951
Re: [CLOSED] BGRABitmap Free
«
Reply #8 on:
January 26, 2022, 12:17:34 am »
My Google works fine.
Why reinvent the wheel?
Code: Pascal
[Select]
[+]
[-]
Image1
.
Picture
.
Bitmap
:
=
MyImage
.
Bitmap
;
Image1
.
Update
;
Works fine.
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
Josh
Hero Member
Posts: 1274
Re: [CLOSED] BGRABitmap Free
«
Reply #9 on:
January 26, 2022, 05:54:12 pm »
you could use an intermeddiate bitmap to hold the image; should work on all os's. no update should be needed.
Code: Pascal
[Select]
[+]
[-]
var
bmp
:
tbitmap
;
MyImage
:
TBGRABitmap
;
begin
MyImage
:
=
TBGRABitmap
.
Create
;
bmp
:
=
tbitmap
.
Create
;
myimage
.
LoadFromFile
(
'1.bmp'
)
;
bmp
.
SetSize
(
myimage
.
Width
,
myimage
.
Height
)
;
bmp
.
Canvas
.
Draw
(
0
,
0
,
myimage
.
Bitmap
)
;
image1
.
Picture
.
Bitmap
:
=
bmp
;
MyImage
.
Free
;
bmp
.
free
;
end
;
Logged
The best way to get accurate information on the forum is to post something wrong and wait for corrections.
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