st

my build of st - simple terminal
git clone git://git.kocotian.pl/st.git
Log | Files | Refs | README | LICENSE

commit ce27e634910e10c470b2dcb2edcd20f05d25343b
parent 9e004846def39ee73eeb06ba9b1be0e389752441
Author: Aurélien Aptel <aurelien.aptel@gmail.com>
Date:   Sat, 16 Oct 2010 17:13:22 +0200

redraw optimization.

Diffstat:
Mst.c | 36++++++++++++++++++++++++------------
1 file changed, 24 insertions(+), 12 deletions(-)

diff --git a/st.c b/st.c @@ -58,6 +58,7 @@ enum { GLYPH_SET=1, GLYPH_DIRTY=2 }; enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 }; enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 }; enum { SCREEN_UPDATE, SCREEN_REDRAW }; +enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 }; typedef struct { char c; /* character code */ @@ -117,8 +118,7 @@ typedef struct { int bufh; /* pixmap height */ int ch; /* char height */ int cw; /* char width */ - int focus; - int vis; /* is visible */ + char state; /* focus, redraw, visible */ } XWindow; typedef struct { @@ -1166,7 +1166,7 @@ tputc(char c) { tnewline(); break; case '\a': - if(!xw.focus) + if(!(xw.state & WIN_FOCUSED)) xseturgency(1); break; case '\033': @@ -1418,7 +1418,7 @@ xdrawcursor(void) { xclear(oldx, oldy, oldx, oldy); /* draw the new one */ - if(!(term.c.state & CURSOR_HIDE) && xw.focus) { + if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) { xdraws(&g.c, g, term.c.x, term.c.y, 1); oldx = term.c.x, oldy = term.c.y; } @@ -1458,7 +1458,7 @@ draw(int redraw_all) { Glyph base, new; char buf[DRAW_BUF_SIZ]; - if(!xw.vis) + if(!(xw.state & WIN_VISIBLE)) return; xclear(0, 0, term.col-1, term.row-1); @@ -1487,27 +1487,36 @@ draw(int redraw_all) { } xdrawcursor(); XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER); - XFlush(xw.dis); } #endif void expose(XEvent *ev) { - draw(SCREEN_REDRAW); + XExposeEvent *e = &ev->xexpose; + if(xw.state & WIN_REDRAW) { + if(!e->count) { + xw.state &= ~WIN_REDRAW; + draw(SCREEN_REDRAW); + } + } else + XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER, + e->width, e->height, e->x, e->y); } void visibility(XEvent *ev) { XVisibilityEvent *e = &ev->xvisibility; - /* XXX if this goes from 0 to 1, need a full redraw for next Expose, - * not just a buf copy */ - xw.vis = e->state != VisibilityFullyObscured; + if(e->state == VisibilityFullyObscured) + xw.state &= ~WIN_VISIBLE; + else if(!(xw.state & WIN_VISIBLE)) + /* need a full redraw for next Expose, not just a buf copy */ + xw.state |= WIN_VISIBLE | WIN_REDRAW; } void unmap(XEvent *ev) { - xw.vis = 0; + xw.state &= ~WIN_VISIBLE; } void @@ -1520,8 +1529,11 @@ xseturgency(int add) { void focus(XEvent *ev) { - if((xw.focus = ev->type == FocusIn)) + if(ev->type == FocusIn) { + xw.state |= WIN_FOCUSED; xseturgency(0); + } else + xw.state &= ~WIN_FOCUSED; draw(SCREEN_UPDATE); }