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Re: Resolution Independent View?
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Re: Resolution Independent View?


  • Subject: Re: Resolution Independent View?
  • From: Chunk 1978 <email@hidden>
  • Date: Wed, 13 May 2009 04:28:11 -0400

i suppose i could still try to do what i'm attempting by being
slightly larger, but were your results on different screens
drastically different in most cases?

On Wed, May 13, 2009 at 4:12 AM, Gerriet M. Denkmann
<email@hidden> wrote:
>
> On 12 May 2009, at 16:33, Alastair Houghton <email@hidden>
> wrote:
>>
>> If, however, you really want the display to physically show a 5cm x
>> 5cm block, you can obtain the screen's actual dimensions in
>> millimeters from CGDisplayScreenSize() and then use those numbers in
>> conjunction with the pixel dimensions to calculate a suitable transform.
>
> I just tried this on a white MacBook (1280 x 800 pixels).
> I was told that my screen is 290 x 190 mm.
> The I took a ruler and measured it and got: 286.208 x 178.88 (actually I
> measured 286 x 179, but I doctored the numbers to make them look better and
> produce square pixels 0.2236 mm wide).
>
> I tried this before on different screens and always got answers which were
> wrong and very boldly rounded to some centimeter.
>
> So CGDisplayScreenSize does not return the actual screen size but the size
> to be displayed in promotional brochures - as clearly indicated by the
> function name (which is NOT CGActualScreenSize for a reason).
>
> Kind regards,
>
> Gerriet.
>
>
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