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Bring in some of my scroll-optimisation stuff from the old Mac port.

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This introduces a new front-end function, do_scroll(), which is expected to
scroll a part of the physical display and cause repaint events for any
areas that couldn't be scrolled (e.g. because they were hidden).
scroll_display() is a wrapper around this which also updates disptext to
match.

Currently, scroll_display is only used in response to user scrollback requests
(via term_scroll()), but extending scroll() to use it as well should be
easy.

All of this is conditional on the front end's defining OPTIMISE_SCROLL, since
only the Mac front end currently implements do_scroll().

[originally from svn r2242]
This commit is contained in:
Ben Harris
2002-11-23 13:07:29 +00:00
parent d923ad791e
commit 03aa22be3c
3 changed files with 43 additions and 0 deletions
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putty.h
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@ -405,6 +405,9 @@ void request_resize(void *frontend, int, int);
void do_text(Context, int, int, char *, int, unsigned long, int);
void do_cursor(Context, int, int, char *, int, unsigned long, int);
int char_width(Context ctx, int uc);
#ifdef OPTIMISE_SCROLL
void do_scroll(void *, int, int, int);
#endif
void set_title(void *frontend, char *);
void set_icon(void *frontend, char *);
void set_sbar(void *frontend, int, int, int);