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Improve speed of drw_text when provided with large strings 

Calculates len & ew in drw_font_getexts loop by incrementing instead of
decrementing; as such avoids proportional increase in time spent in loop
based on provided strings size.
This commit is contained in:
Miles Alan 2021-08-09 18:24:14 +02:00 committed by Hiltjo Posthuma
parent 138b405f0c
commit 716233534b
1 changed files with 5 additions and 2 deletions
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7
drw.c
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@ -310,8 +310,11 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
if (utf8strlen) {
drw_font_getexts(usedfont, utf8str, utf8strlen, &ew, NULL);
/* shorten text if necessary */
for (len = MIN(utf8strlen, sizeof(buf) - 1); len && ew > w; len--)
drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
if (ew > w)
for (ew = 0, len = 0; ew < w - lpad * 2 && len < MIN(utf8strlen, sizeof(buf) - 1); len++)
drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
else
len = MIN(utf8strlen, sizeof(buf) - 1);
if (len) {
memcpy(buf, utf8str, len);