Call for help - understanding how to debug sw module

[Chris Sherlock]

No probs, good pointer I think I can work with that :-)

Chris

On Friday, January 29, 2016, Tomaž Vajngerl <quikee at gmail.com> wrote:

> Hi,
>
> On Thu, Jan 28, 2016 at 9:52 AM, Chris Sherlock
> <chris.sherlock79 at gmail.com <javascript:;>> wrote:
> > I did a calculation from http://www.sven.de/dpi and apparently I have a
> pixel density of 267.02 PPI.
> >
> > Wondering if this is skewing the calculations.
>
> OS usually doesn't tell the correct monitor DPI to the application but
> usually just reports 96 DPI (if no scaling is applied). In windows you
> can change the scale levels - 100%, 125%, 150%, 200%,... which just
> adjusts what DPI is reported to the application (100% - 96DPI, 125% -
> 120DPI, 150% - 144 DPI, 200% - 192DPI...) so the application can scale
> accordingly (at least fonts). I'm not sure how OSX does this.
>
> You should check what DPI is actually reported to LO - OutputDevice
> has mnDPIX and mnDPIY - check where they are set and to what value.
> DPI influences how pixels are converted to and from actual units (mm,
> inch, twips,..) It could be that we transform between units just too
> much and the error accumulates if the DPI is set to a weird value.
> Tracking this down could be tricky.
>
> > Chris
>
> Regards, Tomaž
>
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