BorlandTalk.com

Ruby · Guest

Hi,

My application got this global -

Graphics::TBitmap *TempPic;

on my OnClick event for a SpeedButton i have this -

TempPic = new Graphics::TBitmap();
TempPic->PixelFormat = pf24bit;

Now i don't know why, but "TempPic->PixelFormat" stays zero and
don't want to change into pf24bit (which should be 6). even if i
write this -

TempPic->PixelFormat = 6;

or even this -

TempPic->PixelFormat = 1;

and i check the value of "TempPic->PixelFormat", it's still 0!

Why does it not changing to what i ask it to?

Thanks for any help :-)

Ruby

Maynard Philbrook · Guest

becuase you have not yet set the any size to the bitmap.
there for it does not yet exists.
i think after you do a set on the width and Height you may see your
change.

Ruby wrote:

Ananth B. · Guest

Hi Ruby,
You will need to load some data into the picture before u change its
PixelFormat. Maybe thats the problem here ?

--
Hope this helps,

Regards,
Ananth B.

Ruby · Guest

Hi Ananth, thanks, but i don't think that this is the problem.

First, on the same computer (it's using Win-2000) i'm having
another project with the same lines of code exactly, and there
it's working very well, i could not find ANY differents between
this 2 sources, i also looked at the h files, which also looks
exactly the same, i even took the cpp source that is working,
and i Cut-Pasted it to the other project, and it's still not
working...

Second, i don't think that i need to load data into the Bitmap
before i'm setting it's PixelFormat, i just set it's Width and
Height, than it's PixelFormat, for using it as a memory Bitmap
which i drow on and than copy to the form's canvas.

Here is the source again, but i think that the problem is not
here but some place else...

What do you think?

Here is my last code -

#include <vcl.h>
#pragma hdrstop
#include "Animation.h"
#pragma package(smart_init)
#pragma resource "*.dfm"

TForm1 *Form1;

Graphics::TBitmap *TempPic;
int i;

__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
TempPic = new Graphics::TBitmap();

TempPic->Width = 50;
TempPic->Height = 50;
TempPic->PixelFormat = pf24bit; // But it's stays zero...
}

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

"Ananth B." <ananth__b-at-hotmail.com> wrote:

Ruby · Guest

Hi Ananth, are you still here?

I have found the solution! but i still can't understand it...
Maybe you can explain it, or anyone else...

On my project options i had this -

Project->Options->Linker tab->"Use dynamic RTL" = true (checked)

Project->Options->Packages tab->"Build with runtime packages" =
true (checked)

This way i had the problem...

But after i changed it to this -

Project->Options->Linker tab->"Use dynamic RTL" = false
(unchecked)

Project->Options->Packages tab->"Build with runtime packages" =
false (unchecked)

Then suddenly it was OK! Smile

(this is what i also had in the
code that was working)

How do you explain this strange thing?

Ruby.