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Speeding up the drawing, then all characters are known.

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This commit is contained in:
Christoph Lohmann 2012-12-29 15:03:03 +01:00
parent 9c44229c62
commit addc848345
1 changed files with 103 additions and 81 deletions
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96
st.c
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@ -437,7 +437,7 @@ typedef struct {
*/
static Fontcache frc[256];
static int frccur = 0, frclen = 0;
static int frccur = -1, frclen = 0;
ssize_t
xwrite(int fd, char *s, size_t len) {
@ -2410,7 +2410,7 @@ xunloadfonts(void)
ip = LEN(frc) - 1;
XftFontClose(xw.dpy, frc[ip].font);
}
frccur = 0;
frccur = -1;
frclen = 0;
XftFontClose(xw.dpy, dc.font.match);
@ -2532,11 +2532,12 @@ xinit(void) {
void
xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
int winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
width = charlen * xw.cw, u8clen, xp, i, frp, frcflags;
width = charlen * xw.cw, xp, i;
int frp, frcflags;
int u8fl, u8fblen, u8cblen, doesexist;
char *u8c, *u8fs;
long u8char;
char *u8c;
Font *font = &dc.font;
XftFont *sfont;
FcResult fcres;
FcPattern *fcpattern, *fontpattern;
FcFontSet *fcsets[] = { NULL };
@ -2608,11 +2609,6 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
bg = temp;
}
/* Width of the whole string that should be printed. */
XftTextExtentsUtf8(xw.dpy, font->match, (FcChar8 *)s, bytelen,
&extents);
width = extents.xOff;
/* Intelligent cleaning up of the borders. */
if(x == 0) {
xclear(0, (y == 0)? 0 : winy, borderpx,
@ -2630,24 +2626,49 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
/* Clean up the region we want to draw to. */
XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
/*
* Step through all UTF-8 characters one by one and search in the font
* cache ring buffer, whether there was some font found to display the
* unicode value of that UTF-8 character.
*/
fcsets[0] = font->set;
for (xp = winx; bytelen > 0;) {
u8c = s;
u8clen = utf8decode(s, &u8char);
s += u8clen;
bytelen -= u8clen;
sfont = font->match;
/*
* Only check the font cache or load new fonts, if the
* characters is not represented in main font.
* Search for the range in the to be printed string of glyphs
* that are in the main font. Then print that range. If
* some glyph is found that is not in the font, do the
* fallback dance.
*/
if (!XftCharExists(xw.dpy, font->match, u8char)) {
u8fs = s;
u8fblen = 0;
u8fl = 0;
for (;;) {
u8c = s;
u8cblen = utf8decode(s, &u8char);
s += u8cblen;
bytelen -= u8cblen;
doesexist = XftCharIndex(xw.dpy, font->match, u8char);
if (!doesexist || bytelen <= 0) {
if (bytelen <= 0) {
if (doesexist) {
u8fl++;
u8fblen += u8cblen;
}
}
if (u8fl > 0) {
XftDrawStringUtf8(xw.draw, fg,
font->match, xp,
winy + font->ascent,
(FcChar8 *)u8fs,
u8fblen);
xp += font->width * u8fl;
}
break;
}
u8fl++;
u8fblen += u8cblen;
}
if (doesexist)
break;
frp = frccur;
/* Search the font cache. */
for (i = 0; i < frclen; i++, frp--) {
@ -2659,6 +2680,8 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
break;
}
}
/* Nothing was found. */
if (i >= frclen) {
/*
* Nothing was found in the cache. Now use
@ -2681,19 +2704,19 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
fontpattern = FcFontSetMatch(0, fcsets,
FcTrue, fcpattern, &fcres);
frccur++;
frclen++;
if (frccur >= LEN(frc))
frccur = 0;
if (frclen >= LEN(frc)) {
frclen = LEN(frc);
XftFontClose(xw.dpy, frc[frccur].font);
}
/*
* Overwrite or create the new cache entry
* entry.
*/
frccur++;
frclen++;
if (frccur >= LEN(frc))
frccur = 0;
if (frclen > LEN(frc)) {
frclen = LEN(frc);
XftFontClose(xw.dpy, frc[frccur].font);
}
frc[frccur].font = XftFontOpenPattern(xw.dpy,
fontpattern);
frc[frccur].c = u8char;
@ -2704,11 +2727,10 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
frp = frccur;
}
sfont = frc[frp].font;
}
XftDrawStringUtf8(xw.draw, fg, sfont, xp, winy + sfont->ascent,
(FcChar8 *)u8c, u8clen);
XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
xp, winy + frc[frp].font->ascent,
(FcChar8 *)u8c, u8cblen);
xp += font->width;
}