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Subject: RE: [cgmo-webcgm] Updated DTD and sample instance


Actually the WebCGM Profile does address font substitution for
interpreters.  See T.26.6.  I agree that implementing a standard font
mapping file requires a change to that table with a reference to the new
Chapter 9.

It also addresses it on the generator side in T.25.4. 

Dave

 


Technical Fellow - Graphics/Digital Data Interchange
Boeing Commercial Airplane
206.544.3560, fax 206.662.3734
david.w.cruikshank@boeing.com

-----Original Message-----
From: Bezaire, Benoit [mailto:bbezaire@ptc.com] 
Sent: Thursday, March 20, 2008 7:34 AM
To: CGM Open WebCGM TC
Subject: RE: [cgmo-webcgm] Updated DTD and sample instance

Dave, not sure if you have email access by now. I wouldn't mind getting
your thoughts on this? 

-----Original Message-----
From: Bezaire, Benoit [mailto:bbezaire@ptc.com]
Sent: Wednesday, March 19, 2008 8:53 AM
To: CGM Open WebCGM TC
Subject: RE: [cgmo-webcgm] Updated DTD and sample instance

I was under the impression the spec allowed a font mapping mechanism,
but it doesn't. The only thing the spec says is that if the font is not
present, the default font should be used.

This, to me, is a user agent feature. If it gets standardize, the
profile would need to change.  

I would be in favor (if doable) to change the profile and help the
situation by, for example:
- allowing a list of font index (instead of one) on text elements, (if
the first font is not available, try the following one, and so on).
- allowing generic font-families: serif, sans-serif, cursive, fantasy,
monospace
- modifying the list of allowed fonts in the profile, i.e., select fonts
that are available on multiple platforms.

Overall, I would try to get rid of the font mapping mechanism instead of
standardizing it. Also I wonder if something that has been around for 17
years should be modified. If users are accustomed to the vendors files,
why change them and possibly risk new font related issues.

Ben

-----Original Message-----
From: Cruikshank, David W [mailto:david.w.cruikshank@boeing.com]
Sent: Tuesday, March 18, 2008 2:14 PM
To: Bezaire, Benoit; CGM Open WebCGM TC
Subject: RE: [cgmo-webcgm] Updated DTD and sample instance


 Every CGM product (viewer and illustrating packages) I've worked with
over the last 17 years has a font mapping mechanism.  This was an
attempt to standardize that file.  Whether my computer (platform
independent)has helvetica, arial, swiss, etc., it allows me to control
the display font that I want to use from what is called out in the CGM
file.  The WebCGM Profile calls out the Adobe 13 fonts.  Included in
that list is 'Helvetica' (case insensitive).  Helvetica is not a font
that Microsoft distributes in windows.  It does distribute Arial.  I do
have Helvetica in my unix box, but I also have Swiss on that box.  I may
want to use it instead.

Font mapping has been around for a long time in the CGM community.

dave


Technical Fellow - Graphics/Digital Data Interchange Boeing Commercial
Airplane 206.544.3560, fax 206.662.3734 david.w.cruikshank@boeing.com

-----Original Message-----
From: Bezaire, Benoit [mailto:bbezaire@ptc.com]
Sent: Monday, March 17, 2008 1:04 PM
To: CGM Open WebCGM TC
Subject: RE: [cgmo-webcgm] Updated DTD and sample instance

I've been thinking about this for a while, and I'm not convinced this
will help interoperability. I'm referring mostly to the font mapping
section.

Are there any restrictions on the content of <cgmFont>?
Are there any restrictions on the content of <displayFont>?

Are the problems mainly when going from Unix to Windows (and vice
versa)?
What's a typical (frequent) scenario?

Ben

-----Original Message-----
From: Cruikshank, David W [mailto:david.w.cruikshank@boeing.com]
Sent: Sunday, March 16, 2008 6:23 PM
To: CGM Open WebCGM TC
Subject: [cgmo-webcgm] Updated DTD and sample instance

I found a problem in the WebCGM configuration DTD, fixed it, and created
sample instance to demonstrate its usage.

The instance is made up using some of the PTC font mapping table and
some Boeing settings for the style properties.

I have not incorporated scaling of the font glyphs in the x and y
direction yet, but will do that at the mapping level.

The font mapping was set up only to be used by viewers.  I could extend
it to cover both import and export, so it could be applied to
illustrating packages (thoughts?)

Thx...Dave
 <<webcgmConfig.dtd>>  <<myconfig.xml>> 

Technical Fellow - Graphics/Digital Data Interchange Boeing Commercial
Airplane 206.544.3560, fax 206.662.3734 david.w.cruikshank@boeing.com


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