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Does GetPixel work with TBGRABitmap?
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Author
Topic: Does GetPixel work with TBGRABitmap? (Read 1243 times)
user5
Sr. Member
Posts: 357
Does GetPixel work with TBGRABitmap?
«
on:
December 17, 2019, 10:59:24 am »
I can't get GetPixel(x,y) to work with TBGRABitmap. The code below keeps coming up with clNone. Can someone show me what I'm doing wrong or show me a simple example of how to use GetPixel with TBGRABitmap? Thanks.
Code: Pascal
[Select]
[+]
[-]
procedure
TForm1
.
Button12Click
(
Sender
:
TObject
)
;
var
mybitmap
:
TBitmap
;
bgra
:
TBGRABitmap
;
tempcolor
:
TColor
;
tempstr
:
string
;
begin
mybitmap
:
=
TBitmap
.
create
;
mybitmap
.
width
:
=
image1
.
width
;
mybitmap
.
height
:
=
image1
.
height
;
mybitmap
.
assign
(
image1
.
picture
.
bitmap
)
;
application
.
processmessages
;
bgra
:
=
TBGRABitmap
.
create
(
mybitmap
.
width
,
mybitmap
.
height
)
;
bgra
.
assign
(
mybitmap
)
;
tempcolor
:
=
bgra
.
GetPixel
(
30
,
30
)
;
tempstr
:
=
ColorToString
(
tempcolor
)
;
edit1
.
text
:
=
tempstr
;
bgra
.
free
;
mybitmap
.
free
;
end
;
Logged
user5
Sr. Member
Posts: 357
Re: Does GetPixel work with TBGRABitmap?
«
Reply #1 on:
December 17, 2019, 01:00:02 pm »
I did some research and testing and found something that works. If anyone is interested the code below works with GetPixel and BGRABitmap. Thanks anyway.
Code: Pascal
[Select]
[+]
[-]
procedure
TForm1
.
Button12Click
(
Sender
:
TObject
)
;
var
mybitmap
:
TBitmap
;
bgra
:
TBGRABitmap
;
tempcolor
:
TColor
;
tempstr
:
string
;
c
:
TBGRAPixel
;
begin
mybitmap
:
=
TBitmap
.
create
;
mybitmap
.
width
:
=
image1
.
width
;
mybitmap
.
height
:
=
image1
.
height
;
mybitmap
.
assign
(
image1
.
picture
.
bitmap
)
;
application
.
processmessages
;
bgra
:
=
TBGRABitmap
.
create
(
mybitmap
.
width
,
mybitmap
.
height
)
;
bgra
.
assign
(
mybitmap
)
;
c
:
=
bgra
.
GetPixel
(
30
,
30
)
;
tempcolor
:
=
BGRAToColor
(
c
)
;
tempstr
:
=
ColorToString
(
tempcolor
)
;
edit1
.
text
:
=
tempstr
;
bgra
.
free
;
mybitmap
.
free
;
end
;
Logged
circular
Hero Member
Posts: 4221
Re: Does GetPixel work with TBGRABitmap?
«
Reply #2 on:
December 19, 2019, 04:53:40 pm »
You can try something like
bgra.GetPixel(30,30).ToColor
Logged
Conscience is the debugger of the mind
winni
Hero Member
Posts: 3197
Re: Does GetPixel work with TBGRABitmap?
«
Reply #3 on:
December 19, 2019, 05:29:10 pm »
@user5
You can simplify your code. Your lines 15 & 16 could be pulled to one line.
From
Code: Pascal
[Select]
[+]
[-]
bgra
:
=
TBGRABitmap
.
create
(
mybitmap
.
width
,
mybitmap
.
height
)
;
bgra
.
assign
(
mybitmap
)
;
To
Code: Pascal
[Select]
[+]
[-]
bgra
:
=
TBGRABitmap
.
create
(
mybitmap
)
;
It creates a TBGRABitmap with height and width of myBitmap and then it make a copy.
Winni
Logged
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) »
Does GetPixel work with TBGRABitmap?
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