Re: [cc65] tgi_outtext, no more questions, hopefully :)

Hi Fatih,

> Well, you're technically right, even though Atari fonts are not typographically
> correct, one can assume that the last row is the descender. Should I change
> it?

While adjusting the Apple2 driver to the specs outlined here I had the
same idea, but now I think we rather need to strictly adhere to Uz'
definition:

"Then lets define that pixel fonts have their baseline at the bottom
pixel line of the bitmapped characters. This will be different for
vector fonts, but I see pixel fonts as something that should be simple
by design."

The rationale (beside the simplicity):

The TGI kernel is supposed to take care of clipping.

Let's presume a 320x200 pixel screensize and a 8 pixel font height.
Then for a horizonal text without magnification the TGI kernel will
make sure that the y position will be [7..199]. And for a vertical
text without magnification it will make sure that the x position will
be [7..319].

This means that the TGI kernel clipping presumes that the font extends
only to the top (or left) from the drawing position - and the driver
needs to work according to that presumtion in order to have the
clipping work correctly.

Best, Oliver
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