[Lazarus] PDF generator: please test

[Dmitry Boyarintsev]

On Sun, Apr 10, 2016 at 3:15 AM, Michael Van Canneyt <michael at freepascal.org
> wrote:

It feels like, these two paragraphs:

>
> The user of the API should not have to care what font is used.
> the API should do whatever is necessary to emit correct PDF for the
> current font.
>
> If internally there are different calls needed for different fonts, then
> that is OK, but they should not be exposed to the user, at the best they
> should be made protected.
> (if need be, we can expose them later)
>

contradict to:


> If the currently used font does not contain the necessary glyphs to
> represent
> the text, we will not check it, that is the responsability of the user.


The APIs should either do the font-substitution  (with whatever level  of
control from the user side). (something what graphic APIs are doing for
text rendering)
or should not do them at all (leaving full font-substitution to the user)

Then there should be some cross-platform APIs provided (not necessary part
of PDF package) that would perform font substitution by the (unicode) text
and the desired font (font-size).

Eventually, someone would provide  WriteUTF8TextSmart() function, that
would split the text into parts (by fonts used) and would populate the PDF
accordingly, if PDF library doesn't the font-substitution itself.

For example, rendering a text with mix of latin letters and hieroglyphs,
using Times New Roman font. Typically for hieroglyphs one of system default
CJK fonts are used.

thanks,
Dmitry
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