Baselining Fonts

Knowledge exchange related to the VPE Report Engine and PDF Library

Moderator: IDEAL Software Support

Baselining Fonts

Postby LPF » Tue Sep 15, 2009 2:35 pm

Have had significant issues attempting to baseline a font. Plain Text fonts apparently only return the font's height. I cannot find that the font's Ascent or Descent can be readily determined, as there does not seem to be a VpeGet(hDoc, VPERENDERASCENT). I can approximate the baseline by assigning a percentage of the returned height to the Ascent and the Descent; however, it is an approximation and I would really prefer to be a little more accurate. By another laborious method, I can kludge a baseline reasonably accurately, but my method empirically discovers a baseline and is too slow for production.

I noticed in a forum post a reference from Support to using RTF text to get/use a baseline as the post states that RFT prints on the baseline, but I have been unable to achieve that myself. The post says that at least the Professional version is needed, and I have Enterprise, so I think I fit the requirement. My tests have revealed RTF text printing/previewing from the Upper Left in the same manner as the Plain Text does, not the baseline. What am I missing?

Is there any way to programatically discover/retrieve a VPE/VPERTF font's baseline, ascent, or descent?
Thank you...
LPF
 
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Postby IDEAL Software Support » Tue Sep 15, 2009 3:57 pm

There is no function to determine the baseline, ascent or descent. Text within an RTF object (Rich Text) is always baseline-oriented. Therefore you can use different font sizes within a single RTF object and all the text is oriented at the baseline.

If you need such a function - for whatever reason - you can contact us by e-mail to discuss that in more detail. There is always the option that we make special enhancements to VPE in the background of contractual work.
IDEAL Software Support
 
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