mirror of https://github.com/tmux/tmux.git
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.
Nicholas Marriott
parent
1e5cb8d2e4
commit
c64cf68244
4
CHANGES
4
CHANGES
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@ -1,5 +1,7 @@
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21 November 2007
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* Create every line as zero length and only expand it as data is written,
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rather than creating at full size immediately.
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* Make command output (eg list-keys) go to a scrollable window similar to
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scroll mode.
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* Redo screen redrawing so it is a) readable b) split into utility functions
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@ -247,4 +249,4 @@
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(including mutt, emacs). No status bar yet and no key remapping or other
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customisation.
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$Id: CHANGES,v 1.79 2007-11-21 19:44:04 nicm Exp $
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$Id: CHANGES,v 1.80 2007-11-21 22:20:44 nicm Exp $
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@ -1,4 +1,4 @@
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/* $Id: cmd-list-windows.c,v 1.10 2007-11-21 13:11:41 nicm Exp $ */
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/* $Id: cmd-list-windows.c,v 1.11 2007-11-21 22:20:44 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -42,15 +42,28 @@ const struct cmd_entry cmd_list_windows_entry = {
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void
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cmd_list_windows_exec(unused void *ptr, struct cmd_ctx *ctx)
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{
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struct winlink *wl;
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struct window *w;
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struct winlink *wl;
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struct window *w;
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u_int i, sy;
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unsigned long long size;
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RB_FOREACH(wl, winlinks, &ctx->session->windows) {
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w = wl->window;
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ctx->print(ctx, "%d: %s \"%s\" (%s) [%ux%u] [history %u]",
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sy = w->screen.hsize + w->screen.dy;
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size = sizeof *w;
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for (i = 0; i < sy; i++)
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size += 4 + w->screen.grid_size[i] * 3;
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size += sy * (sizeof *w->screen.grid_data);
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size += sy * (sizeof *w->screen.grid_attr);
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size += sy * (sizeof *w->screen.grid_colr);
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size += sy * (sizeof *w->screen.grid_size);
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ctx->print(ctx,
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"%d: %s \"%s\" (%s) [%ux%u] [history %u] [%llu bytes]",
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wl->idx, w->name, w->screen.title, ttyname(w->fd),
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screen_size_x(&w->screen), screen_size_y(&w->screen),
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w->screen.hsize);
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w->screen.hsize, size);
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}
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if (ctx->cmdclient != NULL)
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@ -1,4 +1,4 @@
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/* $Id: screen-display.c,v 1.4 2007-11-21 21:28:58 nicm Exp $ */
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/* $Id: screen-display.c,v 1.5 2007-11-21 22:20:44 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -139,9 +139,7 @@ screen_display_cursor_set(struct screen *s, u_char ch)
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px = screen_x(s, s->cx);
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py = screen_y(s, s->cy);
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s->grid_data[py][px] = ch;
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s->grid_attr[py][px] = s->attr;
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s->grid_colr[py][px] = s->colr;
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screen_set_cell(s, px, py, ch, s->attr, s->colr);
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}
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/* Move cursor up and scroll if necessary. */
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@ -405,11 +403,15 @@ screen_display_insert_characters(struct screen *s, u_int px, u_int py, u_int nx)
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py = screen_y(s, py);
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/* XXX Cheat and make the line a full line. */
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if (s->grid_size[py] < screen_size_x(s))
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screen_expand_line(s, py, screen_size_x(s));
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/*
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* Inserting a range of nx at px.
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*
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* - Move sx - (px + nx) from px to px + nx.
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* - Clear the range at px.
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* - Clear the range at px to px + nx.
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*/
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if (px + nx != screen_last_x(s)) {
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@ -418,6 +420,7 @@ screen_display_insert_characters(struct screen *s, u_int px, u_int py, u_int nx)
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memmove(&s->grid_attr[py][px + nx], &s->grid_attr[py][px], mx);
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memmove(&s->grid_colr[py][px + nx], &s->grid_colr[py][px], mx);
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}
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memset(&s->grid_data[py][px], SCREEN_DEFDATA, nx);
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memset(&s->grid_attr[py][px], SCREEN_DEFATTR, nx);
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memset(&s->grid_colr[py][px], SCREEN_DEFCOLR, nx);
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@ -437,11 +440,15 @@ screen_display_delete_characters(struct screen *s, u_int px, u_int py, u_int nx)
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py = screen_y(s, py);
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/* XXX Cheat and make the line a full line. */
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if (s->grid_size[py] < screen_size_x(s))
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screen_expand_line(s, py, screen_size_x(s));
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/*
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* Deleting the range from px to px + nx.
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*
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* - Move sx - (px + nx) from px + nx to px.
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* - Clear the range from the last x - (rx - lx) to the last x.
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* - Clear the range from sx - nx to sx.
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*/
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if (px + nx != screen_last_x(s)) {
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137
screen.c
137
screen.c
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@ -1,4 +1,4 @@
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/* $Id: screen.c,v 1.34 2007-11-21 21:28:58 nicm Exp $ */
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/* $Id: screen.c,v 1.35 2007-11-21 22:20:44 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -110,7 +110,7 @@ screen_create(struct screen *s, u_int dx, u_int dy)
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void
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screen_resize(struct screen *s, u_int sx, u_int sy)
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{
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u_int i, ox, oy, ny, my;
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u_int ox, oy, ny, my;
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if (sx < 1)
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sx = 1;
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@ -126,23 +126,6 @@ screen_resize(struct screen *s, u_int sx, u_int sy)
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* X dimension.
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*/
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if (sx != ox) {
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/* Resize on-screen lines. */
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for (i = s->hsize; i < s->hsize + oy; i++) {
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if (sx > s->grid_size[i]) {
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s->grid_data[i] =
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xrealloc(s->grid_data[i], sx, 1);
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s->grid_attr[i] =
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xrealloc(s->grid_attr[i], sx, 1);
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s->grid_colr[i] =
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xrealloc(s->grid_colr[i], sx, 1);
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s->grid_size[i] = sx;
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}
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if (sx > ox) {
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screen_fill_cells(s, ox, i, sx - ox,
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SCREEN_DEFDATA, SCREEN_DEFATTR,
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SCREEN_DEFCOLR);
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}
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}
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if (s->cx >= sx)
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s->cx = sx - 1;
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s->dx = sx;
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@ -201,6 +184,56 @@ screen_resize(struct screen *s, u_int sx, u_int sy)
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s->rlower = s->dy - 1;
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}
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/* Expand line. */
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void
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screen_expand_line(struct screen *s, u_int py, u_int nx)
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{
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u_int ox;
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ox = s->grid_size[py];
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s->grid_size[py] = nx;
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s->grid_data[py] = xrealloc(s->grid_data[py], 1, nx);
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memset(&s->grid_data[py][ox], SCREEN_DEFDATA, nx - ox);
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s->grid_attr[py] = xrealloc(s->grid_attr[py], 1, nx);
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memset(&s->grid_attr[py][ox], SCREEN_DEFATTR, nx - ox);
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s->grid_colr[py] = xrealloc(s->grid_colr[py], 1, nx);
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memset(&s->grid_colr[py][ox], SCREEN_DEFCOLR, nx - ox);
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}
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/* Get cell. */
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void
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screen_get_cell(struct screen *s,
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u_int cx, u_int cy, u_char *data, u_char *attr, u_char *colr)
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{
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if (cx >= s->grid_size[cy]) {
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*data = SCREEN_DEFDATA;
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*attr = SCREEN_DEFATTR;
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*colr = SCREEN_DEFCOLR;
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} else {
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*data = s->grid_data[cy][cx];
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*attr = s->grid_attr[cy][cx];
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*colr = s->grid_colr[cy][cx];
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}
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}
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/* Set a cell. */
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void
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screen_set_cell(struct screen *s,
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u_int cx, u_int cy, u_char data, u_char attr, u_char colr)
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{
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if (cx >= s->grid_size[cy]) {
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if (data == SCREEN_DEFDATA &&
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attr == SCREEN_DEFATTR && colr == SCREEN_DEFCOLR)
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return;
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screen_expand_line(s, cy, cx + 1);
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}
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s->grid_data[cy][cx] = data;
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s->grid_attr[cy][cx] = attr;
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s->grid_colr[cy][cx] = colr;
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}
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/* Destroy a screen. */
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void
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screen_destroy(struct screen *s)
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@ -235,6 +268,20 @@ screen_draw_start(struct screen_draw_ctx *ctx,
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input_store_zero(b, CODE_CURSOROFF);
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}
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/* Get cell data during drawing. */
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void
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screen_draw_get_cell(struct screen_draw_ctx *ctx,
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u_int px, u_int py, u_char *data, u_char *attr, u_char *colr)
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{
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struct screen *s = ctx->s;
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u_int cx, cy;
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cx = ctx->ox + px;
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cy = screen_y(s, py) - ctx->oy;
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screen_get_cell(s, cx, cy, data, attr, colr);
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}
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/* Finalise drawing. */
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void
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screen_draw_stop(struct screen_draw_ctx *ctx)
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@ -254,28 +301,6 @@ screen_draw_stop(struct screen_draw_ctx *ctx)
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input_store_zero(b, CODE_CURSORON);
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}
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/* Get cell data. */
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void
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screen_draw_get_cell(struct screen_draw_ctx *ctx,
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u_int px, u_int py, u_char *data, u_char *attr, u_char *colr)
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{
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struct screen *s = ctx->s;
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u_int cx, cy;
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cx = ctx->ox + px;
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cy = screen_y(s, py) - ctx->oy;
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if (cx >= s->grid_size[cy]) {
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*data = SCREEN_DEFDATA;
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*attr = SCREEN_DEFATTR;
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*colr = SCREEN_DEFCOLR;
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} else {
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*data = s->grid_data[cy][cx];
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*attr = s->grid_attr[cy][cx];
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*colr = s->grid_colr[cy][cx];
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}
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}
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/* Move cursor. */
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void
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screen_draw_move(struct screen_draw_ctx *ctx, u_int px, u_int py)
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@ -372,16 +397,13 @@ screen_make_lines(struct screen *s, u_int py, u_int ny)
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u_int i;
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for (i = py; i < py + ny; i++) {
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s->grid_data[i] = xmalloc(s->dx);
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s->grid_attr[i] = xmalloc(s->dx);
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s->grid_colr[i] = xmalloc(s->dx);
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s->grid_size[i] = s->dx;
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s->grid_data[i] = NULL;
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s->grid_attr[i] = NULL;
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s->grid_colr[i] = NULL;
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s->grid_size[i] = 0;
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}
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screen_fill_lines(
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s, py, ny, SCREEN_DEFDATA, SCREEN_DEFATTR, SCREEN_DEFCOLR);
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}
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/* Free a range of ny lines at py. */
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void
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screen_free_lines(struct screen *s, u_int py, u_int ny)
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@ -389,9 +411,15 @@ screen_free_lines(struct screen *s, u_int py, u_int ny)
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u_int i;
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for (i = py; i < py + ny; i++) {
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xfree(s->grid_data[i]);
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xfree(s->grid_attr[i]);
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xfree(s->grid_colr[i]);
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if (s->grid_data[i] != NULL)
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xfree(s->grid_data[i]);
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s->grid_data[i] = NULL;
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if (s->grid_attr[i] != NULL)
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xfree(s->grid_attr[i]);
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s->grid_attr[i] = NULL;
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if (s->grid_colr[i] != NULL)
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xfree(s->grid_colr[i]);
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s->grid_colr[i] = NULL;
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s->grid_size[i] = 0;
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}
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}
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@ -426,7 +454,8 @@ void
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screen_fill_cells(struct screen *s,
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u_int px, u_int py, u_int nx, u_char data, u_char attr, u_char colr)
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{
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memset(&s->grid_data[py][px], data, nx);
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memset(&s->grid_attr[py][px], attr, nx);
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memset(&s->grid_colr[py][px], colr, nx);
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u_int i;
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for (i = px; i < px + nx; i++)
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screen_set_cell(s, i, py, data, attr, colr);
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}
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8
tmux.h
8
tmux.h
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@ -1,4 +1,4 @@
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/* $Id: tmux.h,v 1.91 2007-11-21 20:04:37 nicm Exp $ */
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/* $Id: tmux.h,v 1.92 2007-11-21 22:20:44 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -61,7 +61,7 @@ extern char *__progname;
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#define TTY_NAME_MAX 32
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#endif
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#define MAXTITLELEN 192
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#define MAXTITLELEN 128
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/* Fatal errors. */
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#define fatal(msg) log_fatal("%s: %s", __func__, msg);
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@ -764,6 +764,10 @@ u_char screen_stringcolour(const char *);
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void screen_create(struct screen *, u_int, u_int);
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void screen_destroy(struct screen *);
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void screen_resize(struct screen *, u_int, u_int);
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void screen_expand_line(struct screen *, u_int, u_int);
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void screen_get_cell(
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struct screen *, u_int, u_int, u_char *, u_char *, u_char *);
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void screen_set_cell(struct screen *, u_int, u_int, u_char, u_char, u_char);
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void screen_draw_start(struct screen_draw_ctx *,
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struct screen *, struct buffer *, u_int, u_int);
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void screen_draw_stop(struct screen_draw_ctx *);
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