Re: [Swftools-common] possible rounding issue when using "-s zoom="

[Ben Broadhurst]

Hi Chris,
thanks for the advice - I know that 8 decimal places is overkill, but I 
have tried rounding to a variety of digits; if it rounds up it works, if 
it rounds down it doesn't. Your first suggestion works for example, but 
rounded to 2 digits doesn't as that is rounded down. I am experimenting 
with simply adding a fixed number (0.001) to see if this is enough to 
fix it.

Adding digits to a number doesn't make it smaller btw; 0.431 is bigger 
than 0.43 - it's only when rounding that a number with more digits can 
be smaller than one with less.

Again cheers for the feedback, always appreciated!

ben.


Chris Pugh wrote:
> Did you perchance try,
>
>    pdf2swf -p 1 -s zoom=54.43365479 -s jpegquality=90 -S -z
> page_01.pdf -o page_01.swf
>
>    pdf2swf -p 1 -s zoom=54.4336548 -s jpegquality=90 -S -z page_01.pdf
> -o page_01.swf
>
>    pdf2swf -p 1 -s zoom=54.433655 -s jpegquality=90 -S -z page_01.pdf
> -o page_01.swf
>
>    pdf2swf -p 1 -s zoom=54.43366 -s jpegquality=90 -S -z page_01.pdf
> -o page_01.swf
>
>    pdf2swf -p 1 -s zoom=54.4337 -s jpegquality=90 -S -z page_01.pdf -o
> page_01.swf
>
>    pdf2swf -p 1 -s zoom=54.434 -s jpegquality=90 -S -z page_01.pdf -o
> page_01.swf
>
> ??
>
> Just maybe using .43365478 is rather overdoing the accuracy?  Remember
> that the more decimal places one adds, the smaller, theoretically, the
> number gets.
>
> Regards,
>
>
> Chris.
>
>
> On 3 March 2010 14:00, Ben Broadhurst
> <address@hidden> wrote:
>   
> > Hi all,
> > I am having a minor issue with swfs being sized incorrectly. An example pdf is 
> > here:
> > http://ps1.sk.im/7/8/78826/PDFs/page_01.pdf
> >
> > PDF size info:
> > width/height: 595.22x842 points (209.98x297.04 mm)
> >
> > Our system converts pdfs to 450px wide, so I calculate the "-s zoom=" param 
> > with the formulae (450/widthInPoints)*72, this gives me a dpi of 54.43365478
> >
> > So pdf2swf get run like this:
> > pdf2swf -p 1 -s zoom=54.43365478 -s jpegquality=90 -S -z PDFs/page_01.pdf -o 
> > hiRes/page_01.swf
> >
> > This generates an sdf that is 449 pixels wide. Not a huge difference I know, 
> > but it gives us headaches down the line. This happens in about 7% of PDFs that 
> > I convert, and when it does happen it's always 449 - never 451 which is why I 
> > thought it may be a rounding issue.
> >
> > In case it helps, I get the size info out using pdf2text (www.pdftron.com) 
> > using the command line:
> > pdf2text --pages 1 --pageinfo PDFs/page_01.pdf
> >
> > which spits out:
> > 595.22, 842, 0, 0, 595.22, 842, 0, 0, 595.22, 842, 180
> >
> > which is page    width     height     mw     mh     pw     ph    cropLeft     
> > cropBottom     nw     nh     rotation
> >
> > These dimensions match what I get from Acrobat as well.
> >
> > Sorry for the long email - I have been trying to fix this for what feels like 
> > my entire natural life.
> >
> > Cheers all,
> > ben.
> >
> >
> >
> >
> >
> >     
>
>
>
>