[TYPO3-core] RFC #8070: Feature: CSS styled content / scalable rendering of images

[Martin Kutschker]

Franz Koch schrieb:
> Hey guys,
> 
>>> But the change should be easy. Anyway, to be forward compatible I advise
>>> not to use any boolean switches like useEM, but something like
>>> "dimUnit", "dimensionUnit" or simply "unit". The possible values are
>>> "px" (the default), "em" and "ex".
>>
>> That would be a good thing, agreed.
> 
> I'd like to see typo3 beeing able to use any dimension unit for any size
> value, like:
> 
> width = 50%
> space = 1em|1em
> 
> so a parser determing the unit and calculate the rest based on it.

For the space there is nothing to calculate for TYPO3, right? I has just
to apply it to the style attribute (instead of adding blindly "px" to
integer). As em is based on the font size there is no point in
calculating a pixel width from an em value on the server side.

I still don't know what should happen when you use a % value for the
image with. For em (and ex) it's clear that ou need a scaling factor in
respect to the original image (which BTW may vary based on the DPI of
the image; and mind that the horizontal and vertical resulution may be
different too).

So what should TYPO3 now do? Simple solution: don't scale the image at
all. But this probably means that it will send happily the 5MB file of
digital photographies.

> yes - using % for image scaling would really be something nice. Much
> better than the em-concept that doesn't convince me at all.

I had no time to look at the mentioned site, but em/ex are nice as they
scale with the font. If you have a style sheet selector that changes the
font size then the image will scale with that.

OK, let's move the discussion to the rendering group.

Masi