[emacs-bidi] understanding Emacs' display engine

[Kenichi Handa]

This is a supplemental note to Eli's mail.

From the experience of my previous patch for basic bidi
support, I think you should at first understand the function
display_line (in xdisp.c) and these important functions
called from it:
        get_next_display_element,
        set_iterator_to_next
        PRODUCE_GLYPHS
The last one is an macro, and on X, actually,
x_produce_glyphs is called.

Next, move_it_XXXX (in xdisp.c) are also important.

And, at last, the actual code that draw strings on X window
starts from x_draw_glyphs and jump macros placed before
that.

I think dispnew.c is not that important, at least, for
starters.


---
Ken'ichi HANDA
address@hidden