Why EDID is not trustworthy for DPI

Nicolas Mailhot nicolas.mailhot at laposte.net
Thu Oct 6 11:13:21 UTC 2011

Le Mer 5 octobre 2011 23:35, Matthew Garrett a écrit :

> This... works badly. Really. Open gimp and add some text. Now double the
> size of the font. Save the image and open it in image viewer, and zoom
> out so the text is half the size. It doesn't look the same as your
> original text.
> Rendering fonts (and even SVGs) well requires you to know the scale that
> you're rendering to. More pixels mean you can add more detail. If you
> shrink that then the additional detail is still there, getting in the
> way of the actually important information. Doing this properly requires
> that the original object renderer be part of the scaling process, and
> doing that on the fly with reasonable performance just isn't part of our
> rendering stack at the moment.

Which is exactly why forcing 96dpi on displays which have very different pixel
densities *today* is not a good idea at all.

Nicolas Mailhot

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