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Date Posted: 17:52:45 02/13/02 Wed
Author: Michel
Subject: Re: Fax TIFF in Fine Mode
In reply to: glup 's message, "Re: Fax TIFF in Fine Mode" on 08:50:44 02/13/02 Wed


Hi Glup,

>Why does SaveToStream/File draw the image into a new
>canvas that does have another aspect ratio than the
>original?

Some formats don't specify the resolution. I am not sure what you mean by this. A file should be saved in the same resolution it was read. For example, a tiff file should be saved in the same resolution as when it was read.

>I understand that Delphi likes working with pixels, so
>the "rest" should support this. But why should the
>"user" (here developer) care when using a device
>independent graphic about the device aspect ratio and
>the device resolution? This I see as a nice implizit
>task for the component.

I'm still not quite sure I understand you. The resolution (which determines the aspect ratio, if X <> Y ) is important when scanning and printing images. The only case I have seen that XDpi <> YDpi is with low res fax images. What kind of implicite transformation would you see? The only thing I can see is to resize images when they are read or scanned, if XDpi <> YDpi, and force the resolution to be equal. When saving, the original resolutions would be changed though.

Best regards,

Michel

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