[reportlab-users] Font size, baseline and typography stuff

[Dinu Gherman]

"Robin Becker" <robin at reportlab.com>:


> for what it's worth I have fixed (hopefully) Path.getBounds so it  

> doesn't use the simplistic assumption from the original code.

>

> Testing using some rather extreme paths eg

>

>

>> from reportlab.graphics.shapes import Drawing, _DrawingEditorMixin,  

>> definePath, String, Rect

>> from reportlab.lib.colors import red, blue, green

>>

>> class TPathBounds_002(_DrawingEditorMixin,Drawing):

>> 	def __init__(self,width=400,height=200,*args,**kw):

>> 		Drawing.__init__(self,width,height,*args,**kw)

>> 		self._add(self,definePath([('moveTo',10,100),('curveTo',70,160,160,40,100,100)],strokeWidth=1,strokeColor=red),name='p',validate=None,desc=None)

>> 		sb = self.p.getBounds()

>> 		self._add(self,String(10,self.height-12,'bounds:  

>> '+str(sb),fillColor=blue),name=None,validate=None,desc=None)

>> 		self._add(self,Rect(sb[0],sb[1],sb[2]-sb[0],sb[3]-sb[1],strokeColor=blue,strokeDashArray=(1,1),fillColor=None),name='b',validate=None,desc=None)

>>

>> if __name__=="__main__": #NORUNTESTS

>> 	TPathBounds_002().save(formats=['pdf'],outDir='.',fnRoot=None)

>

> revealed an error in renderPM (caused by the old version of  

> libart_lgpl); the bounds were good, but the _renderPM bpath to vpath  

> conversion left out the extreme point.

>

> It should now be fixed.


Sounds great, except that I didn't have the time yet to trace
your changes in your SVN repository. Isn't there any nicer
overview (with change dates etc) than this:

   http://svn.reportlab.com/svn/public/reportlab/trunk/src/rl_addons/renderPM/

OTOH, I wrote another test, showing single characters' bound-
ding boxes and splitting them into glyphs and showing their
individual bounding boxes, too. See attached script (I'm not
adding a PDF since I remember some tight size limitations on
this list...).

I found that for the TT fonts I checked the boxes seemed more
correct than for the standard Type1 fonts. And I found an
issue with Unicode when trying to display letters with dia-
critical marks.

Robin, maybe you can have a look at that? Or point me to the
list of changes and files I need to download to check myself?

Thanks!

Dinu
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