st

my build of st - simple terminal
git clone git://git.kocotian.pl/st.git
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commit b3b7ffce5f1cb1d82aa26df976f0316d89d15d7f
parent 0f4dd5035ed920c67133f1a4b8aef5cbd957c7be
Author: Aurélien Aptel <aurelien.aptel@gmail.com>
Date:   Mon, 15 Mar 2010 23:56:38 +0100

double-buffering added using pixmap (finally).

results in a lot of simplification :
	- no more dirty flags (perf are good enough).
	- no more ugly gfx call in emulation functions.
LINESPACE removed from config.h.
BORDER is now handled correctly.
Diffstat:
Mconfig.h | 3+--
Mst.c | 69++++++++++++++++++++++++---------------------------------------------
2 files changed, 25 insertions(+), 47 deletions(-)

diff --git a/config.h b/config.h @@ -3,8 +3,7 @@ #define FONT "6x13" #define BOLDFONT FONT"bold" -#define BORDER 3 -#define LINESPACE 0 /* additional pixel between each line */ +#define BORDER 2 /* Terminal colors */ static const char *colorname[] = { diff --git a/st.c b/st.c @@ -91,6 +91,7 @@ typedef struct { typedef struct { Display* dis; Window win; + Pixmap buf; int scr; int w; /* window width */ int h; /* window height */ @@ -154,7 +155,6 @@ static unsigned long xgetcol(const char *); static void xclear(int, int, int, int); static void xcursor(int); static void xinit(void); -static void xscroll(void); static void expose(XEvent *); static char* kmap(KeySym); @@ -215,7 +215,7 @@ execsh(void) { void xbell(void) { /* visual bell */ - XRectangle r = { 0, 0, xw.w, xw.h }; + XRectangle r = { BORDER, BORDER, xw.w, xw.h }; XSetForeground(xw.dis, dc.gc, dc.col[BellCol]); XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1); /* usleep(30000); */ @@ -350,9 +350,7 @@ void tscroll(void) { Line temp = term.line[term.top]; int i; - /* No dirty flag to set because of xscroll */ - /* X stuff _before_ the line swapping (results in wrong line index) */ - xscroll(); + for(i = term.top; i < term.bot; i++) term.line[i] = term.line[i+1]; memset(temp, 0, sizeof(Glyph) * term.col); @@ -364,7 +362,6 @@ tscrolldown (int n) { int i; Line temp; - /* TODO: set dirty flag or scroll with some X func */ LIMIT(n, 0, term.bot-term.top+1); for(i = 0; i < n; i++) @@ -383,7 +380,6 @@ tscrollup (int n) { Line temp; LIMIT(n, 0, term.bot-term.top+1); - /* TODO: set dirty flag or scroll with some X func */ for(i = 0; i < n; i++) memset(term.line[term.top+i], 0, term.col*sizeof(Glyph)); @@ -467,7 +463,7 @@ void tsetchar(char c) { term.line[term.c.y][term.c.x] = term.c.attr; term.line[term.c.y][term.c.x].c = c; - term.line[term.c.y][term.c.x].state |= GLYPH_SET | GLYPH_DIRTY; + term.line[term.c.y][term.c.x].state |= GLYPH_SET; } void @@ -486,8 +482,6 @@ tclearregion(int x1, int y1, int x2, int y2) { for(y = y1; y <= y2; y++) memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1)); - - xclear(x1, y1, x2, y2); } void @@ -519,13 +513,6 @@ tinsertblank(int n) { } void -tsetlinestate(int n, int state) { - int i; - for(i = 0; i < term.col; i++) - term.line[n][i].state |= state; -} - -void tinsertblankline(int n) { int i; Line blank; @@ -546,8 +533,6 @@ tinsertblankline(int n) { term.line[i-n] = blank; /* blank it */ memset(blank, 0, term.col * sizeof(Glyph)); - tsetlinestate(i, GLYPH_DIRTY); - tsetlinestate(i-n, GLYPH_DIRTY); } } @@ -572,8 +557,6 @@ tdeleteline(int n) { term.line[i+n] = blank; /* blank it */ memset(blank, 0, term.col * sizeof(Glyph)); - tsetlinestate(i, GLYPH_DIRTY); - tsetlinestate(i-n, GLYPH_DIRTY); } } @@ -1037,21 +1020,10 @@ xgetcol(const char *s) { void xclear(int x1, int y1, int x2, int y2) { - XClearArea(xw.dis, xw.win, - x1 * xw.cw, y1 * xw.ch, - (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch, - False); -} - -void -xscroll(void) { - int srcy = (term.top+1) * xw.ch; - int dsty = term.top * xw.ch; - int height = (term.bot-term.top) * xw.ch; - - xcursor(CURSOR_HIDE); - XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty); - xclear(0, term.bot, term.col-1, term.bot); + XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]); + XFillRectangle(xw.dis, xw.buf, dc.gc, + x1 * xw.cw, y1 * xw.ch, + (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch); } void @@ -1073,7 +1045,7 @@ xinit(void) { /* XXX: Assuming same size for bold font */ xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing; - xw.ch = dc.font->ascent + dc.font->descent + LINESPACE; + xw.ch = dc.font->ascent + dc.font->descent; /* colors */ for(i = 0; i < LEN(colorname); i++) @@ -1085,11 +1057,11 @@ xinit(void) { /* windows */ xw.h = term.row * xw.ch; xw.w = term.col * xw.cw; - /* XXX: this BORDER is useless after the first resize, handle it in xdraws() */ xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0, - xw.w, xw.h, BORDER, + xw.w + 2*BORDER, xw.h + 2*BORDER, 0, dc.col[DefaultBG], dc.col[DefaultBG]); + xw.buf = XCreatePixmap(xw.dis, xw.win, xw.w, xw.h, XDefaultDepth(xw.dis, xw.scr)); /* gc */ dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL); XMapWindow(xw.dis, xw.win); @@ -1097,11 +1069,13 @@ xinit(void) { chint.res_name = TNAME, chint.res_class = TNAME; wmhint.input = 1, wmhint.flags = InputHint; shint.height_inc = xw.ch, shint.width_inc = xw.cw; - shint.height = xw.h, shint.width = xw.w; + shint.height = xw.h + 2*BORDER, shint.width = xw.w + 2*BORDER; shint.flags = PSize | PResizeInc; XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint); XStoreName(xw.dis, xw.win, TNAME); + XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.w, xw.h); XSync(xw.dis, 0); + } void @@ -1123,10 +1097,10 @@ xdraws(char *s, Glyph base, int x, int y, int len) { s[i] = gfx[s[i]]; XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid); - XDrawImageString(xw.dis, xw.win, dc.gc, winx, winy, s, len); + XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len); if(base.mode & ATTR_UNDERLINE) - XDrawLine(xw.dis, xw.win, dc.gc, winx, winy+1, winx+width-1, winy+1); + XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1); } void @@ -1163,7 +1137,7 @@ xdrawc(int x, int y, Glyph g) { XSetBackground(xw.dis, dc.gc, dc.col[g.bg]); XSetForeground(xw.dis, dc.gc, dc.col[g.fg]); XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid); - XDrawImageString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1); + XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1); } void @@ -1178,6 +1152,8 @@ draw_(int dummy) { if(!term.hidec) xcursor(CURSOR_DRAW); + XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.w, xw.h, BORDER, BORDER); + XFlush(xw.dis); } #endif @@ -1187,7 +1163,6 @@ draw(int redraw_all) { Glyph base, new; char buf[DRAW_BUF_SIZ]; - /* XXX: optimize with GLYPH_DIRTY hint */ for(y = 0; y < term.row; y++) { base = term.line[y][0]; i = ox = 0; @@ -1206,6 +1181,8 @@ draw(int redraw_all) { xdraws(buf, base, ox, y, i); } xcursor(term.hidec ? CURSOR_HIDE : CURSOR_DRAW); + XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.w, xw.h, BORDER, BORDER); + XFlush(xw.dis); } void @@ -1273,6 +1250,8 @@ resize(XEvent *e) { ttyresize(col, row); xw.w = e->xconfigure.width; xw.h = e->xconfigure.height; + XFreePixmap(xw.dis, xw.buf); + xw.buf = XCreatePixmap(xw.dis, xw.win, xw.w, xw.h, XDefaultDepth(xw.dis, xw.scr)); draw(SCREEN_REDRAW); } } @@ -1285,7 +1264,7 @@ run(void) { running = 1; XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask); - XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* fix resize bug in wmii (?) */ + XResizeWindow(xw.dis, xw.win, xw.w+2*BORDER, xw.h+2*BORDER); /* fix resize bug in wmii (?) */ while(running) { FD_ZERO(&rfd);