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Cut memory consumption by only allocating lines when there is actually data on them, and only as much as the right-most data. Everything else is filled in at runtime.

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This commit is contained in:
Nicholas Marriott
2007-11-21 22:20:44 +00:00
parent 1e5cb8d2e4
commit c64cf68244
5 changed files with 123 additions and 68 deletions
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19
screen-display.c
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@ -1,4 +1,4 @@
/* $Id: screen-display.c,v 1.4 2007-11-21 21:28:58 nicm Exp $ */
/* $Id: screen-display.c,v 1.5 2007-11-21 22:20:44 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@ -139,9 +139,7 @@ screen_display_cursor_set(struct screen *s, u_char ch)
px = screen_x(s, s->cx);
py = screen_y(s, s->cy);
s->grid_data[py][px] = ch;
s->grid_attr[py][px] = s->attr;
s->grid_colr[py][px] = s->colr;
screen_set_cell(s, px, py, ch, s->attr, s->colr);
}
/* Move cursor up and scroll if necessary. */
@ -405,11 +403,15 @@ screen_display_insert_characters(struct screen *s, u_int px, u_int py, u_int nx)
py = screen_y(s, py);
/* XXX Cheat and make the line a full line. */
if (s->grid_size[py] < screen_size_x(s))
screen_expand_line(s, py, screen_size_x(s));
/*
* Inserting a range of nx at px.
*
* - Move sx - (px + nx) from px to px + nx.
* - Clear the range at px.
* - Clear the range at px to px + nx.
*/
if (px + nx != screen_last_x(s)) {
@ -418,6 +420,7 @@ screen_display_insert_characters(struct screen *s, u_int px, u_int py, u_int nx)
memmove(&s->grid_attr[py][px + nx], &s->grid_attr[py][px], mx);
memmove(&s->grid_colr[py][px + nx], &s->grid_colr[py][px], mx);
}
memset(&s->grid_data[py][px], SCREEN_DEFDATA, nx);
memset(&s->grid_attr[py][px], SCREEN_DEFATTR, nx);
memset(&s->grid_colr[py][px], SCREEN_DEFCOLR, nx);
@ -437,11 +440,15 @@ screen_display_delete_characters(struct screen *s, u_int px, u_int py, u_int nx)
py = screen_y(s, py);
/* XXX Cheat and make the line a full line. */
if (s->grid_size[py] < screen_size_x(s))
screen_expand_line(s, py, screen_size_x(s));
/*
* Deleting the range from px to px + nx.
*
* - Move sx - (px + nx) from px + nx to px.
* - Clear the range from the last x - (rx - lx) to the last x.
* - Clear the range from sx - nx to sx.
*/
if (px + nx != screen_last_x(s)) {