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optimize QFont::lastResortFont()

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Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
This commit is contained in:
Ivailo Monev 2019-12-26 21:19:00 +00:00
parent 47a2cf587e
commit edb9f7c9c9
1 changed files with 19 additions and 28 deletions
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47
src/gui/text/qfont_x11.cpp
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@ -245,14 +245,7 @@ QString QFont::defaultFamily() const
}
}
/*
Returns a last resort raw font name for the font matching algorithm.
This is used if even the last resort family is not available. It
returns \e something, almost no matter what. The current
implementation tries a wide variety of common fonts, returning the
first one it finds. The implementation may change at any time.
*/
static const char * const tryFonts[] = {
static const char* LastResortFontsTbl[] = {
"-*-helvetica-medium-r-*-*-*-120-*-*-*-*-*-*",
"-*-courier-medium-r-*-*-*-120-*-*-*-*-*-*",
"-*-times-medium-r-*-*-*-120-*-*-*-*-*-*",
@ -271,37 +264,35 @@ static const char * const tryFonts[] = {
"8x13",
"9x15",
"fixed",
0
};
static const qint16 LastResortFontsTblSize = 18;
// Returns true if the font exists, false otherwise
static bool fontExists(const QString &fontName)
{
int count;
char **fontNames = XListFonts(QX11Info::display(), (char*)fontName.toLatin1().constData(), 32768, &count);
if (fontNames) XFreeFontNames(fontNames);
return count != 0;
}
/*
Returns a last resort raw font name for the font matching algorithm.
This is used if even the last resort family is not available. It
returns \e something, almost no matter what. The current
implementation tries a wide variety of common fonts, returning the
first one it finds. The implementation may change at any time.
*/
QString QFont::lastResortFont() const
{
static QString last;
// already found
if (! last.isNull())
if (!last.isNull())
return last;
int i = 0;
const char* f;
for (qint16 i = 0; i < LastResortFontsTblSize; i++) {
int count;
char **fontNames = XListFonts(QX11Info::display(), LastResortFontsTbl[i], SHRT_MAX, &count);
if (fontNames) {
XFreeFontNames(fontNames);
}
while ((f = tryFonts[i])) {
last = QString::fromLatin1(f);
if (fontExists(last))
if (count != 0) {
last = QString::fromLatin1(LastResortFontsTbl[i]);
return last;
i++;
}
}
#if defined(CHECK_NULL)