[reportlab-users] Incorrect character composition

[Glenn Linderman]

6-7 weeks with no response, for a while I thought the list was dead, but 
now a flurry of messages....

I guess I didn't actually ask a question, but is this, like kerning, 
thought to be too slow to implement, or is it just that the market for 
reportlab simply doesn't include languages that don't have precomposed 
glyphs, or something else?

On 2/21/2015 1:18 PM, Glenn Linderman wrote:
> Hi,
>
> I've suddenly discovered a need to use Unicode characters that do not 
> fall into the category of "precomposed glyphs", instead being forced 
> to use "combining characters" for certain diacritical marks.
>
> However, the combined result from reportlab looks rather stupid 
> compared to the results seen in other programs (browsers, text 
> editors, word processors, etc.).  I even displayed the results in two 
> different PDF viewers, Sumatra and Adobe, before concluding it must be 
> a reportlab thing.
>
> The problem is with the characters called  open o  (upper and lower 
> case), and  open e (at least lower case, the upper case version looks 
> better, but that may be more due to the open E being narrower than due 
> to proper handling) when combined with the combining tilde, and other 
> similar diacriticals.
>
> In my sample at http://nevcal.com/temporary/openo.pdf I've also 
> included a precomposed ã and Õ as well, for comparison of where the 
> tilde should be placed.  Here are the same characters in email... I 
> note that in my email client (Thunderbind) the precomposed tildes are 
> slightly closer to the characters than the combining tilde, but in the 
> reportlab-generated PDF, the lower case combining tildes are far too 
> high, and those over (wider) upper case characters are not centered.  
> Times New Roman font in both this email (unless your client or the 
> mailing list strips the fonts) and the PDF.
>
> Glenn
>
> ɔãɔ̃ÕƆ̃ɛɛ̃Ɛ̃
>
>
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