Re: redisplay system of emacs

[alin.s]

An improvement in redisplay for X can be done by defining in the edit area of
every window a subwindow for every character. For a window of geometry
200x70 of characters, it would be 1400 windows registered in X-server.

The advantage is that redisplay would work automatically; every character
has associated its own expose event; the event PointerMotionMask would
simply signify LeaveWindow and EnterWindow; so it will always be able to be
captured without resource consuming.

To say more, in order to clear a character it would require no computation,
but only a simply call of XClearWindow().

Every window could have its own font.

And to say more, an image of high dimension will be divided in many
subwindows, and emacs will be able to display images normally, not as a huge
glyph.

And finally, because this structure is identical to the geometry of the
console, the code for X and console can be unified in many places.

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