private unsafe LsErr ExpandGlyphs(
LsGlyphRunInfo *plsglyphrunInfo,
int interWordExpandTo,
int **pplsExpansionLeft,
int **pplsExpansionRight,
LsExpType *plsexptype,
LsExpType interWordExpansionType,
LsExpType interLetterExpansionType
)
{
char* pwch = plsglyphrunInfo->pwch;
ushort* pgmap = plsglyphrunInfo->rggmap;
int cchRun = plsglyphrunInfo->cwch;
int cgiRun = plsglyphrunInfo->cgindex;
int ich = 0;
int igi = pgmap[ich];
int cgi = 0;
while (ich < cchRun)
{
int cch = 1;
while (ich + cch < cchRun && pgmap[ich + cch] == igi)
cch++;
cgi = (ich + cch == cchRun) ? cgiRun - igi : pgmap[ich + cch] - igi;
int i, j;
for (j = 0; j < cch; j++)
{
ushort flags = (ushort)(Classification.CharAttributeOf((int)Classification.GetUnicodeClassUTF16(pwch[ich + j]))).Flags;
if ((flags & ((ushort)CharacterAttributeFlags.CharacterSpace)) != 0)
break;
}
int glyphAdvance = 0;
for (i = 0; i < cgi; i++)
{
glyphAdvance += plsglyphrunInfo->rgduWidth[igi + i];
pplsExpansionLeft[0][igi + i] = 0;
pplsExpansionLeft[1][igi + i] = 0;
pplsExpansionLeft[2][igi + i] = 0;
pplsExpansionRight[0][igi + i] = 0;
pplsExpansionRight[1][igi + i] = 0;
pplsExpansionRight[2][igi + i] = 0;
if (i == cgi - 1)
{
if (cch == 1 && j < cch)
{
int expandedBy = Math.Max(0, interWordExpandTo - glyphAdvance);
pplsExpansionRight[0][igi + i] = expandedBy;
pplsExpansionRight[1][igi + i] = expandedBy * Constants.AcceptableLineStretchability;
pplsExpansionRight[2][igi + i] = FullText.FormatWidth;
plsexptype[igi + i] = interWordExpansionType;
}
else
{
pplsExpansionRight[2][igi + i] = FullText.FormatWidth;
plsexptype[igi + i] = interLetterExpansionType;
}
}
}
ich += cch;
igi += cgi;
}
Invariant.Assert(igi == cgiRun);
return LsErr.None;
}
private unsafe LsErr CompressGlyphs(
LsGlyphRunInfo *plsglyphrunInfo,
int interWordCompressTo,
int **pplsCompressionLeft,
int **pplsCompressionRight
)
{
char* pwch = plsglyphrunInfo->pwch;
ushort* pgmap = plsglyphrunInfo->rggmap;
int cchRun = plsglyphrunInfo->cwch;
int cgiRun = plsglyphrunInfo->cgindex;
int ich = 0;
int igi = pgmap[ich];
int cgi = 0;
while (ich < cchRun)
{
int cch = 1;
while (ich + cch < cchRun && pgmap[ich + cch] == igi)
cch++;
cgi = (ich + cch == cchRun) ? cgiRun - igi : pgmap[ich + cch] - igi;
int i, j;
for (j = 0; j < cch; j++)
{
ushort flags = (ushort)(Classification.CharAttributeOf((int)Classification.GetUnicodeClassUTF16(pwch[ich + j]))).Flags;
if ((flags & ((ushort)CharacterAttributeFlags.CharacterSpace)) != 0)
break;
}
int glyphAdvance = 0;
for (i = 0; i < cgi; i++)
{
glyphAdvance += plsglyphrunInfo->rgduWidth[igi + i];
pplsCompressionLeft[0][igi + i] = 0;
pplsCompressionLeft[1][igi + i] = 0;
pplsCompressionLeft[2][igi + i] = 0;
pplsCompressionRight[0][igi + i] = 0;
pplsCompressionRight[1][igi + i] = 0;
pplsCompressionRight[2][igi + i] = 0;
if ( i == cgi - 1
&& cch == 1
&& j < cch
)
{
pplsCompressionRight[0][igi + i] = Math.Max(0, glyphAdvance - interWordCompressTo);
}
}
ich += cch;
igi += cgi;
}
Invariant.Assert(igi == cgiRun);
return LsErr.None;
}
internal unsafe LsErr GetGlyphExpansionInfoFullMixed(
IntPtr pols, // Line Layout context
LsDevice device, // kind of device
LsTFlow textFlow, // text flow
LsGlyphRunInfo *plsglyphrunInfo, // glyph-based run info
LsNeighborInfo *plsneighborInfoLeft, // left neighbor info
LsNeighborInfo *plsneighborInfoRight, // right neigbor info
int maxPriorityLevel, // maximum priority level
int **pplsexpansionLeft, // [in/out] fill in left expansion amount per priority level on the way out
int **pplsexpansionRight, // [in/out] fill in right expansion amount per priority level on the way out
LsExpType *plsexptype, // [in/out] fill in glyph expansion type for each glyph
int *pduMinInk // [in/out] fill in glyph minimum expansion for exptAddInkContinuous
)
{
LsErr lserr = LsErr.None;
Plsrun plsrun = Plsrun.Undefined;
LSRun lsrun = null;
try
{
Invariant.Assert(maxPriorityLevel == 3);
plsrun = plsglyphrunInfo->plsrun;
lsrun = FullText.StoreFrom(plsrun).GetRun(plsrun);
int em = lsrun.EmSize;
return ExpandGlyphs(
plsglyphrunInfo,
(int)(em * Constants.MaxInterWordExpansionPerEm),
pplsexpansionLeft,
pplsexpansionRight,
plsexptype,
LsExpType.AddWhiteSpace, // inter-word expansion type
((lsrun.BidiLevel & 1) == 0 ? LsExpType.AddWhiteSpace : LsExpType.None)
);
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("GetGlyphExpansionInfoFullMixed", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}
internal unsafe LsErr GetGlyphCompressionInfoFullMixed(
IntPtr pols, // Line Layout context
LsDevice device, // kind of device
LsTFlow textFlow, // text flow
LsGlyphRunInfo *plsglyphrunInfo, // glyph-based run info
LsNeighborInfo *plsneighborInfoLeft, // left neighbor info
LsNeighborInfo *plsneighborInfoRight, // right neigbor info
int maxPriorityLevel, // maximum priority level
int **pplscompressionLeft, // [in/out] fill in left compression amount per priority level on the way out
int **pplscompressionRight // [in/out] fill in right compression amount per priority level on the way out
)
{
LsErr lserr = LsErr.None;
Plsrun plsrun = Plsrun.Undefined;
LSRun lsrun = null;
try
{
Invariant.Assert(maxPriorityLevel == 3);
plsrun = plsglyphrunInfo->plsrun;
lsrun = FullText.StoreFrom(plsrun).GetRun(plsrun);
int em = lsrun.EmSize;
return CompressGlyphs(
plsglyphrunInfo,
(int)(em * Constants.MinInterWordCompressionPerEm),
pplscompressionLeft,
pplscompressionRight
);
}
catch (Exception e)
{
SaveException(e, plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
catch
{
SaveNonCLSException("GetGlyphCompressionInfoFullMixed", plsrun, lsrun);
lserr = LsErr.ClientAbort;
}
return lserr;
}