Keisuke,
Thanks for the helpful response. I had not thought about scaling the image
manually. It took awhile, but I finally got the math right…. It works!!
> is there a reason why your image is scaled on screen?
If I understand the question, a user is manually cropping the image
using a marque tool and so needs to see the whole image at once without
scrolling.
> the scaling factor of a proportional image depends on its orientation and the
> type of scaling you apply (e.g. xMidYMid):
>
> c.f.
> https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/preserveAspectRatio
>
> <https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/preserveAspectRatio>
Thanks for the link. While I did not understand it very well, it did
remind me that the math is different depending on which is larger on the
original picture, width or height.
> unlike resampling with CREATE THUMBNAIL,
> scaling with TRANSFORM PICTURE does not reduce the image quality.
> the result is the same as letting the form object do the scaling,
> except you have control over the ratio.
Yep. The results are great.
Thanks again,
John
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