Lossless PDF scaling
Lossless PDF scaling
- Subject: Lossless PDF scaling
- From: Kirk Kerekes <email@hidden>
- Date: Thu, 2 May 2002 22:56:07 -0500
Explanation by example:
I have a pdf image composed as a 11x17 inch page, in an NSData.
I want to programatically convert it into a pdf image that is internally
scaled, losslessly, to a 8.5x11 page.
"Losslessly" means that a 72dpi bitmap embedded in the original 11x17 image
will draw as a 144dpi bitmap in the 8.5x11 image. It means that all of the
non-bitmap drawing operations in the pdf will be appropriately scaled to
fit in the new page size, and will continue to be "resolution independent"
.
I have tried every juggle with NSImage and NSImageRep and NSPDFImageRep et
al that I can think of. I currently get (relative to the above example)
one of the following results:
1) a 72dpi bitmap of the entire page, scaled or unscaled.
2) a 144dpi bitmap of the entire page, scaled.
3) The original pdf, at the original size.
4) Various interesting reports from the Console crash log.
I have tried many things that, based on the documentation, ought to work.
But if they did, you wouldn't be reading this now.
I know it can be done, because I can take the 11x17 pdf, drop it onto
Preview, do a print-to-Preview, and what comes out is exactly what I want
to get.
Wisdom, anyone?
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