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Formats delphi

Started by Pillejunior Mar 8, 2004 at 4:09 PM 5 replies 700+ views

Original Post

Mar 8, 2004 at 4:09 PM

Can someone point me to a website or such where i can find information where the .bmp and .jpg formats are explained and how i can use them in delphi to save my drawings to that format. I did use google but it gave a lot of links but not the one i am searching for. thanx in advance

Useless Hacker

Mar 8, 2004 at 4:15 PM

Delphi has support for the bmp format using TBitmap. jpg is supported by the TJPEGImage class, in the JPEG unit. If you are drawing on a TPictureBox for example there are methods for saving to a file. Perhaps you could explain a little more about what you are trying to do?

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iMalc

Mar 9, 2004 at 2:49 AM

Generally in Delphi I find that you don''t do things like that, you find a package that already has those features in it for you. BMP saving should be easy I think.

Pillejunior

Mar 9, 2004 at 2:53 AM

I draw ellipse/rectangels/etc on the canvas from the listview(because i can''t get the backcolor of the picturebox to white do you know how??) and now i want to save those drawings to those 2 formats and load from them again?

Useless Hacker

Mar 9, 2004 at 3:23 AM


var
  bitmap: TBitmap;
begin
  bitmap := TBitmap.Create;
  bitmap.Assign(your_canvas);
  bitmap.SaveToFile(''whatever.bmp'');
  bitmap.Free;
end;

(This code is completely untested)

You can do a similar thing with TJPEGImage.

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Pillejunior

Mar 9, 2004 at 3:26 AM

Thanx i shall try it and tell you if it has worked

Pillejunior

Mar 9, 2004 at 3:39 AM

It seems to work except that it doesn''t take a tcontrolcanvas as input.

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