I've a pending patch to "fix" the drawing issues with Qt4.7 we have when fonts
support kerning.
Until we provide a proper solution - not likely in LyX 2.0.0 - I propose to
paint every character separately.
Stephan
Index: src/LyXRC.h
===================================================================
--- src/LyXRC.h (Revision 37639)
+++ src/LyXRC.h (Arbeitskopie)
@@ -79,6 +79,7 @@
RC_EXAMPLEPATH,
RC_EXPORT_OVERWRITE,
RC_FONT_ENCODING,
+ RC_FORCE_PAINT_SINGLE_CHAR,
RC_FILEFORMAT,
RC_FORWARD_SEARCH_DVI,
RC_FORWARD_SEARCH_PDF,
@@ -527,6 +528,8 @@
};
///
ScrollWheelZoom scroll_wheel_zoom;
+ ///
+ bool force_paint_single_char;
};
Index: src/LyXRC.cpp
===================================================================
--- src/LyXRC.cpp (Revision 37639)
+++ src/LyXRC.cpp (Arbeitskopie)
@@ -99,6 +99,7 @@
{ "\\example_path", LyXRC::RC_EXAMPLEPATH },
{ "\\export_overwrite", LyXRC::RC_EXPORT_OVERWRITE },
{ "\\font_encoding", LyXRC::RC_FONT_ENCODING },
+ { "\\force_paint_single_char", LyXRC::RC_FORCE_PAINT_SINGLE_CHAR },
{ "\\format", LyXRC::RC_FILEFORMAT },
{ "\\forward_search_dvi", LyXRC::RC_FORWARD_SEARCH_DVI },
{ "\\forward_search_pdf", LyXRC::RC_FORWARD_SEARCH_PDF },
@@ -422,6 +423,9 @@
if (!lexrc.isOK())
return ReadError;
+ // default for current rowpainter capabilities
+ force_paint_single_char = true;
+
// format prior to 2.0 and introduction of format tag
unsigned int format = 0;
@@ -523,6 +527,10 @@
lexrc >> fontenc;
break;
+ case RC_FORCE_PAINT_SINGLE_CHAR:
+ lexrc >> force_paint_single_char;
+ break;
+
case RC_PRINTER:
lexrc >> printer;
break;
@@ -2180,6 +2188,14 @@
if (tag != RC_LAST)
break;
+ case RC_FORCE_PAINT_SINGLE_CHAR:
+ if (ignore_system_lyxrc ||
+ force_paint_single_char !=
system_lyxrc.force_paint_single_char) {
+ os << "\\force_paint_single_char \"" <<
force_paint_single_char << "\"\n";
+ }
+ if (tag != RC_LAST)
+ break;
+
os << "\n#\n"
<< "# FILE SECTION ######################################\n"
<< "#\n\n";
@@ -2880,6 +2896,7 @@
case LyXRC::RC_ESC_CHARS:
case LyXRC::RC_EXAMPLEPATH:
case LyXRC::RC_FONT_ENCODING:
+ case LyXRC::RC_FORCE_PAINT_SINGLE_CHAR:
case LyXRC::RC_FILEFORMAT:
case LyXRC::RC_GROUP_LAYOUTS:
case LyXRC::RC_HUNSPELLDIR_PATH:
@@ -3122,6 +3139,10 @@
str = _("The font encoding used for the LaTeX2e fontenc
package. T1 is highly recommended for non-English languages.");
break;
+ case RC_FORCE_PAINT_SINGLE_CHAR:
+ str = _("Disable any kerning and ligatures for text drawing on
screen.");
+ break;
+
case RC_FILEFORMAT:
break;
Index: src/rowpainter.cpp
===================================================================
--- src/rowpainter.cpp (Revision 37639)
+++ src/rowpainter.cpp (Arbeitskopie)
@@ -261,9 +261,9 @@
// Maybe a more general fix would be draw character by character
// for some predefined fonts on some platform. In arabic and
// Hebrew we already do paint this way.
- if (prev_char == 'f')
+ if (prev_char == 'f' || lyxrc.force_paint_single_char)
break;
-
+
pos = bidi_.vis2log(vpos);
if (pos < font_span.first || pos > font_span.last)
break;
Index: src/frontends/qt4/GuiApplication.cpp
===================================================================
--- src/frontends/qt4/GuiApplication.cpp (Revision 37639)
+++ src/frontends/qt4/GuiApplication.cpp (Arbeitskopie)
@@ -1839,6 +1839,13 @@
if (d->global_menubar_)
d->global_menubar_->releaseKeyboard();
+#if QT_VERSION < 0x040700
+ // the option to disable kerning in rowpainter
+ // is needed only with Qt4.7.0 or better
+ lyxrc.force_paint_single_char = false;
+ system_lyxrc.force_paint_single_char = false;
+#endif
+
// create new view
int id = view_id;
while (d->views_.find(id) != d->views_.end())
