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Date Posted: 08:53:49 08/12/00 Sat
Author: Michel
Subject: Re: Printing at 600 dpi produces small images
In reply to: Larry Griffiths 's message, "Re: Printing at 600 dpi produces small images" on 09:42:33 08/11/00 Fri


Hi Larry,

I have done a change recently that solves this problem without having to change the PrintMode. This is because the printer metrics were only read when the PrintMode property is assigned. So if the resolution is changed on the printer, but the PrintMOde is not changed, the graphics are not scaled properly. Here is the change.

In EnPrint.Pas, TDibGraphicPrinter.Print,

just before the case PrintMode of statement, add:

{ MB Jul 27, 2000 Re-read the printer metrics as changing the orientation
on some printers may change the parameters }
GetPrinterMetrics(FPrinterMetrics);

case PrintMode of
pmOriginalSize :

I think this will solve the problem.

Best regards,

Michel

> > We can print an image at 300 dpi and it is the
> correct
> > size and proportion on the printer (HP 822C). If we
> > change the settings from normal to best, then the dpi
> > becomes 600 and the image printed is about half the
> > size that it should be.
> > This is under the Windows 2000 operating system.
> >
> > Any ideas?
>
> Never mind :)
>
> We found we needed to do GraphicPrinter.PrintMode when
> printer characteristics changed. It looks like it is
> working now...
>
> Larry.

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