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Date Posted: 21:30:28 01/12/03 Sun
Author: Michel
Subject: Re: GetDIB failed on XP
In reply to: Paul Mead 's message, "Re: GetDIB failed on XP" on 16:37:45 01/10/03 Fri

Hi Paul,

Do you think you would be able to create a simple project that can reproduce the error?

Best regards,


>Hi Micheal
>I had this problem earlier and used your suggestions
>to fix. GlobalAlloc instaed of GetMem at the one
>location in EnDiGrph.pas. This appeared to fix the
>problem, but now it is surfacing again on one New XP
>machine. GetDIB error. Funny this time it appears
>almost as a memory leak. Restart our program and it is
>good for a while than boom, restart and we are good
>for a while again.
>>Hi Ed,
>>I will email you directly a revised EnDiGrph.Pas. It
>>has been reported to me that memory obtained with the
>>VCLs GetMem causes failure on some graphic windows API
>>Let me know if this solves the problem on XP. You will
>>see new calls to AllocMem instead of GetMem.
>>Best regards,
>>>I have a program that creates multiple bitmaps and
>>>saves them as tif files. It works fine on my Windows
>>>2000 box all the time, but when I tried it on XP, I
>>>sometimes get an error "GetDIB failed" (Maybe 50% of
>>>the time). It gets the error when it tries to read
>>>the bitmap I just saved to a file. I have included
>>>sample code for you below. Just drop a
>>>on a form with a button. When the button is pressed,
>>>it should create 6 tiff image files.
>>>procedure TForm1.Button1Click(Sender: TObject);
>>> Index : Integer;
>>> ImageBitmap : TBitmap;
>>> ImageScrollBox1.Clear;
>>> ImageBitmap := TBitmap.Create;
>>> try
>>> With ImageBitmap do
>>> begin
>>> Monochrome := True;
>>> Width := Round(300 * 8.5);
>>> Height := 300 * 11;
>>> Canvas.Font.Size := 24;
>>> end;
>>> For Index := 1 to 6 do
>>> begin
>>> With ImageBitmap do
>>> begin
>>> Canvas.FillRect(Rect(100, 100, 800, 150));
>>> Canvas.TextOut(100, 100, 'Test Image #' +
>>> SaveToFile('Temp.bmp');
>>> Application.ProcessMessages;
>>> end;
>>> ImageScrollBox1.LoadFromFile('Temp.bmp', 1);
>>> ImageScrollBox1.SaveToFile('Image' +
>>>IntToStr(Index) + '.tif');
>>> DeleteFile('Temp.bmp');
>>> end;
>>> finally
>>> ImageBitmap.Free;
>>> end;

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