[TYPO3-core] RFC #11177: Feature: New options noRescale and resolutionFactor for getImgResource()

[Franz Koch]

Hi Ries,

> I did read the whole thread and I see what the intention is now.
> 
> If a DPI is specified, how would you specify the width and the height 
> (in inch or cm)
> for images then??
> Currently TYPO3 'supports' only image sizes in pixels. I can imagine 
> that 'some' calculation
> can be done 'assuming' a Screen DPI is 72 or 96 DPI. But maby stefan can 
> explain
> how the calculations work internally?

I think it's calculated based on 72 and the defined image dimensions in 
px. It's not perfect, but as a first step suitable for PDFs etc. 
(although not prepress ready)

> Further...
> A DPI setting makes only sense if you can specify correct width and 
> height for a image (IMHO).

right - and thats one thing I'm not sure about how it could be handled 
best. Typo3 would have to support different measuring units (cm, inch, 
px, % for flexible layouts). And as you mentioned below support for some 
kind of colormanagement would be needed for a perfect solution.

> I have also worked on DB driven catalogs myself but we decided not
> to let anything be rendered by TYPO3 but we used LaTeX and
> a custom extension that utilizes PDFLib for Index creation, page number 
> for odd/even pages etc.

I my case I meant a bit different thing. Not TYPO3 is creating the 
catalog as PDF, but the DTP software based on XML schemes provided by 
TYPO3. That way you can either automize things in your DTP software 
(like Adobe InDesign) or use dynamic content from the XML sheets inside 
your DTP software.

> The mayor problem with TYPO3 as your render engine is that TYPO3 (and 
> the web)
> doesn't support the CMYK color model and you cannot define your
> page very well so using TYPO3 as your typesetter is just bogus and
> will never work really well (but can work if allow for concessions).

Imagemagick allows for different color-profiles and color-conversion - 
although it might not produce the best results. Nowadays you don't 
necessarily need CMYK anmore, as long as your RGB file has a profile 
attached and the PDF document defines a profile.

-- 
kind regards,
Franz Koch

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