Wrapper which adapts a fonts' geometry to score sheet coordinates.
"glyphText" and "fontName" are for identification.
"alternative" is another GlyphWrapper, iff font loadsing fails.
"stdSizeFactor" is the factor "fontParameter/lineDist", used
to install a font in a given situation.
"xAdjustByLineDist" must be added to the x position when calling the "gr.drawString()",
"stdSize_hotSpotMinusBaseLine_byLineDist" is the same for the y-position.
These both apply to the standard magnification ("logicalSize==0" of the
staff's element). In all other cases both values will be proportionally multiplied.
The "stdSizeFactor" is used in case of "logicalSize==0".
Otherwise the map "overrideSizeFactors" MAY define own size factors for the
other cases explicitly. If not, the normal calulation "params.resolveSizeFactor()"
is applied.
Overriding own size factors may be more adequate for the appearance of the
finally drawn glyph, e.g. in case of Clef Symbols.
The sub-class
GenericGlyphWrapper
simply supplies field values for all these
parameters.