summaryrefslogtreecommitdiffstats
path: root/src/gui/text/qfontengine_ft.cpp
diff options
context:
space:
mode:
authorKonstantin Ritt <ritt.ks@gmail.com>2014-03-03 03:01:14 +0200
committerThe Qt Project <gerrit-noreply@qt-project.org>2014-03-03 11:11:24 +0100
commitaf74201edbb9dc344419ed3f8ebc35f8e8f05617 (patch)
tree3042ca9a1dc7c319bd60e0346a6a427320e721dc /src/gui/text/qfontengine_ft.cpp
parent78d115f8f28a7e3f15c0280e8d87d7041ecff793 (diff)
Introduce QFontEngine::glyphIndex(uint)
...an optimized drop-in replacement for the code like this: `stringToCMap(&uc, 1, &g, &numGlyphs, QFontEngine::GlyphIndicesOnly)` (aka "get the glyph index for exactly one Unicode character"). Change-Id: I22babf49f7cf28892d27533a5ac51ad449779f75 Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Diffstat (limited to 'src/gui/text/qfontengine_ft.cpp')
-rw-r--r--src/gui/text/qfontengine_ft.cpp30
1 files changed, 30 insertions, 0 deletions
diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp
index 140bf16394..b50c8fd95a 100644
--- a/src/gui/text/qfontengine_ft.cpp
+++ b/src/gui/text/qfontengine_ft.cpp
@@ -1525,6 +1525,36 @@ void QFontEngineFT::addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int
unlockFace();
}
+glyph_t QFontEngineFT::glyphIndex(uint ucs4) const
+{
+ glyph_t glyph = ucs4 < QFreetypeFace::cmapCacheSize ? freetype->cmapCache[ucs4] : 0;
+ if (glyph == 0) {
+ FT_Face face = freetype->face;
+ glyph = FT_Get_Char_Index(face, ucs4);
+ if (glyph == 0) {
+ // Certain fonts don't have no-break space and tab,
+ // while we usually want to render them as space
+ if (ucs4 == QChar::Nbsp || ucs4 == QChar::Tabulation) {
+ glyph = FT_Get_Char_Index(face, QChar::Space);
+ } else if (freetype->symbol_map) {
+ // Symbol fonts can have more than one CMAPs, FreeType should take the
+ // correct one for us by default, so we always try FT_Get_Char_Index
+ // first. If it didn't work (returns 0), we will explicitly set the
+ // CMAP to symbol font one and try again. symbol_map is not always the
+ // correct one because in certain fonts like Wingdings symbol_map only
+ // contains PUA codepoints instead of the common ones.
+ FT_Set_Charmap(face, freetype->symbol_map);
+ glyph = FT_Get_Char_Index(face, ucs4);
+ FT_Set_Charmap(face, freetype->unicode_map);
+ }
+ }
+ if (ucs4 < QFreetypeFace::cmapCacheSize)
+ freetype->cmapCache[ucs4] = glyph;
+ }
+
+ return glyph;
+}
+
bool QFontEngineFT::stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
QFontEngine::ShaperFlags flags) const
{