private unsafe GlyphRun ComputeUnshapedGlyphRun(
LSRun lsrun, // LSrun used to shape the GlyphRun
LsTFlow textFlow, // flow direction
TextFormatterImp textFormatterImp, // The TextFormatter Implementation
bool originProvided, // flag indicate whether the origin of the run is provided
LSPOINT lsrunOrigin, // physical start of the run
int dupRun, // width of the run
int cchText, // character count
char *pwchText, // characters for display
int *piCharAdvances, // character advance widths,
bool justify
)
{
GlyphRun glyphRun = null;
if (lsrun.Type == Plsrun.Text)
{
Debug.Assert(lsrun.Shapeable != null);
Point runOrigin = new Point();
int nominalX = 0;
int nominalY = 0;
if (originProvided)
{
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
if (textFlow == LsTFlow.lstflowWS)
{
lsrunOrigin.x -= dupRun;
}
if (currentLine.RightToLeft)
{
lsrunOrigin.x = -lsrunOrigin.x;
}
if (textFormatterImp.TextFormattingMode == TextFormattingMode.Display && justify)
{
LSRun.UVToNominalXY(
Draw.LineOrigin,
Draw.VectorToLineOrigin,
currentLine.LSLineUToParagraphU(lsrunOrigin.x),
lsrunOrigin.y + lsrun.BaselineMoveOffset,
currentLine,
out nominalX,
out nominalY
);
}
else
{
runOrigin = LSRun.UVToXY(
Draw.LineOrigin,
Draw.VectorToLineOrigin,
currentLine.LSLineUToParagraphU(lsrunOrigin.x),
lsrunOrigin.y + lsrun.BaselineMoveOffset,
currentLine
);
}
}
char[] charString = new char[cchText];
IList<double> charWidths;
bool isRightToLeft = (lsrun.BidiLevel & 1) != 0;
if (textFormatterImp.TextFormattingMode == TextFormattingMode.Ideal)
{
charWidths = new ThousandthOfEmRealDoubles(textFormatterImp.IdealToReal(lsrun.EmSize), cchText);
for (int i = 0; i < cchText; i++)
{
charString[i] = pwchText[i];
charWidths[i] = textFormatterImp.IdealToReal(piCharAdvances[i]);
}
}
else
{
if (justify)
{
AdjustMetricsForDisplayModeJustifiedText(
pwchText,
piCharAdvances,
cchText,
isRightToLeft,
nominalX,
nominalY,
out runOrigin,
out charWidths
);
}
else
{
charWidths = new List<double>(cchText);
for (int i = 0; i < cchText; i++)
{
charWidths.Add(textFormatterImp.IdealToReal(piCharAdvances[i]));
}
}
for (int i = 0; i < cchText; i++)
{
charString[i] = pwchText[i];
}
}
glyphRun = lsrun.Shapeable.ComputeUnshapedGlyphRun(
runOrigin,
charString,
charWidths
);
}
return glyphRun;
}
public override IEnumerable<IndexedGlyphRun> GetIndexedGlyphRuns()
{
List<IndexedGlyphRun> indexedGlyphRuns = new List<IndexedGlyphRun>(_runs.Length);
// create each GlyphRun at Point(0, 0)
Point start = new Point(0, 0);
int currentCp = _cpFirst;
foreach(SimpleRun run in _runs)
{
if (run.Length > 0 && !run.Ghost)
{
IList<double> displayGlyphAdvances;
if (_settings.TextFormattingMode == TextFormattingMode.Ideal)
{
displayGlyphAdvances = new ThousandthOfEmRealDoubles(run.EmSize, run.NominalAdvances.Length);
for (int i = 0; i < displayGlyphAdvances.Count; i++)
{
// convert ideal glyph advance width to real width for displaying
displayGlyphAdvances[i] = _settings.Formatter.IdealToReal(run.NominalAdvances[i]);
}
}
else
{
displayGlyphAdvances = new List<double>(run.NominalAdvances.Length);
for (int i = 0; i < run.NominalAdvances.Length; i++)
{
// convert ideal glyph advance width to real width for displaying
displayGlyphAdvances.Add(_settings.Formatter.IdealToReal(run.NominalAdvances[i]));
}
}
GlyphTypeface glyphTypeface = run.Typeface.TryGetGlyphTypeface();
Invariant.Assert(glyphTypeface != null);
// this simple run has GlyphRun
GlyphRun glyphRun = glyphTypeface.ComputeUnshapedGlyphRun(
start,
new CharacterBufferRange(run.CharBufferReference, run.Length),
displayGlyphAdvances,
run.EmSize,
run.TextRun.Properties.FontHintingEmSize,
run.Typeface.NullFont,
CultureMapper.GetSpecificCulture(run.TextRun.Properties.CultureInfo),
null, // device font name
_settings.TextFormattingMode
);
if (glyphRun != null)
{
indexedGlyphRuns.Add(
new IndexedGlyphRun(
currentCp,
run.Length,
glyphRun
)
);
}
}
currentCp += run.Length;
}
return indexedGlyphRuns;
}
private unsafe GlyphRun ComputeShapedGlyphRun(
LSRun lsrun, // ls run
TextFormatterImp textFormatterImp, // The TextFormatter Implementation
bool originProvided, // flag indicate whether the origin of the run is provided
LSPOINT lsrunOrigin, // physical start of the run
int charCount, // characters count
char *pwchText, // characters for the GlyphRun
ushort *puClusterMap, // cluster map
int glyphCount, // glyph count
ushort *puGlyphs, // glyph indices
int *piJustifiedGlyphAdvances, // glyph advances
GlyphOffset *piiGlyphOffsets, // glyph offsets
bool justify
)
{
TextMetrics.FullTextLine currentLine = Draw.CurrentLine;
Point runOrigin = new Point();
int nominalX = 0;
int nominalY = 0;
if (originProvided)
{
if (currentLine.RightToLeft)
{
lsrunOrigin.x = -lsrunOrigin.x;
}
if (textFormatterImp.TextFormattingMode == TextFormattingMode.Display && justify)
{
LSRun.UVToNominalXY(
Draw.LineOrigin,
Draw.VectorToLineOrigin,
currentLine.LSLineUToParagraphU(lsrunOrigin.x),
lsrunOrigin.y + lsrun.BaselineMoveOffset,
currentLine,
out nominalX,
out nominalY
);
}
else
{
runOrigin = LSRun.UVToXY(
Draw.LineOrigin,
Draw.VectorToLineOrigin,
currentLine.LSLineUToParagraphU(lsrunOrigin.x),
lsrunOrigin.y + lsrun.BaselineMoveOffset,
currentLine
);
}
}
char[] charString = new char[charCount];
ushort[] clusterMap = new ushort[charCount];
for (int i = 0; i < charCount; i++)
{
charString[i] = pwchText[i];
clusterMap[i] = puClusterMap[i];
}
ushort[] glyphIndices = new ushort[glyphCount];
IList<double> glyphAdvances;
IList<Point> glyphOffsets;
bool isRightToLeft = (lsrun.BidiLevel & 1) != 0;
if (textFormatterImp.TextFormattingMode == TextFormattingMode.Ideal)
{
glyphAdvances = new ThousandthOfEmRealDoubles(textFormatterImp.IdealToReal(lsrun.EmSize), glyphCount);
glyphOffsets = new ThousandthOfEmRealPoints(textFormatterImp.IdealToReal(lsrun.EmSize), glyphCount);
for (int i = 0; i < glyphCount; i++)
{
glyphIndices[i] = puGlyphs[i];
glyphAdvances[i] = textFormatterImp.IdealToReal(piJustifiedGlyphAdvances[i]);
glyphOffsets[i] = new Point(
textFormatterImp.IdealToReal(piiGlyphOffsets[i].du),
textFormatterImp.IdealToReal(piiGlyphOffsets[i].dv)
);
}
}
else
{
if (justify)
{
AdjustMetricsForDisplayModeJustifiedText(
pwchText,
piJustifiedGlyphAdvances,
glyphCount,
isRightToLeft,
nominalX,
nominalY,
out runOrigin,
out glyphAdvances
);
}
else
{
glyphAdvances = new List<double>(glyphCount);
for (int i = 0; i < glyphCount; i++)
{
glyphAdvances.Add(textFormatterImp.IdealToReal(piJustifiedGlyphAdvances[i]));
}
}
glyphOffsets = new List<Point>(glyphCount);
for (int i = 0; i < glyphCount; i++)
{
glyphIndices[i] = puGlyphs[i];
glyphOffsets.Add(new Point(
textFormatterImp.IdealToReal(piiGlyphOffsets[i].du),
textFormatterImp.IdealToReal(piiGlyphOffsets[i].dv)
));
}
}
#if CHECK_GLYPHS
if ( lsrun._glyphs != null
&& glyphCount <= lsrun._glyphs.Length)
{
for (int i = 0; i < glyphCount; i++)
{
Debug.Assert(glyphIndices[i] == lsrun._glyphs[i], "Corrupted glyphs");
}
}
#endif
GlyphRun glyphRun = lsrun.Shapeable.ComputeShapedGlyphRun(
runOrigin,
charString,
clusterMap,
glyphIndices,
glyphAdvances,
glyphOffsets,
isRightToLeft,
false // no sideway support yet
);
return glyphRun;
}
internal Rect Draw(
DrawingContext drawingContext,
double x,
double y,
bool visiCodePath
)
{
if (Length <= 0 || this.Ghost)
{
return Rect.Empty; // nothing to draw
}
Brush foregroundBrush = TextRun.Properties.ForegroundBrush;
if(visiCodePath && foregroundBrush is SolidColorBrush)
{
Color color = ((SolidColorBrush)foregroundBrush).Color;
foregroundBrush = new SolidColorBrush(Color.FromArgb(
(byte)(color.A>>2), // * 0.25
color.R,
color.G,
color.B
));
}
Rect inkBoundingBox;
IList<double> displayGlyphAdvances;
if (_textFormatterImp.TextFormattingMode == TextFormattingMode.Ideal)
{
displayGlyphAdvances = new ThousandthOfEmRealDoubles(EmSize, NominalAdvances.Length);
for (int i = 0; i < displayGlyphAdvances.Count; i++)
{
// convert ideal glyph advance width to real width for displaying.
displayGlyphAdvances[i] = _textFormatterImp.IdealToReal(NominalAdvances[i]);
}
}
else
{
displayGlyphAdvances = new List<double>(NominalAdvances.Length);
for (int i = 0; i < NominalAdvances.Length; i++)
{
// convert ideal glyph advance width to real width for displaying.
displayGlyphAdvances.Add(_textFormatterImp.IdealToReal(NominalAdvances[i]));
}
}
CharacterBufferRange charBufferRange = new CharacterBufferRange(CharBufferReference, Length);
GlyphTypeface glyphTypeface = Typeface.TryGetGlyphTypeface();
Invariant.Assert(glyphTypeface != null);
GlyphRun glyphRun = glyphTypeface.ComputeUnshapedGlyphRun(
new Point(x, y),
charBufferRange,
displayGlyphAdvances,
EmSize,
TextRun.Properties.FontHintingEmSize,
Typeface.NullFont,
CultureMapper.GetSpecificCulture(TextRun.Properties.CultureInfo),
null, // device font name
_textFormatterImp.TextFormattingMode
);
if (glyphRun != null)
{
inkBoundingBox = glyphRun.ComputeInkBoundingBox();
}
else
{
inkBoundingBox = Rect.Empty;
}
if (!inkBoundingBox.IsEmpty)
{
// glyph run's ink bounding box is relative to its origin
inkBoundingBox.X += glyphRun.BaselineOrigin.X;
inkBoundingBox.Y += glyphRun.BaselineOrigin.Y;
}
if (drawingContext != null)
{
if (glyphRun != null)
{
glyphRun.EmitBackground(drawingContext, TextRun.Properties.BackgroundBrush);
drawingContext.DrawGlyphRun(foregroundBrush, glyphRun);
}
// draw underline here
if (Underline != null)
{
// Determine number of characters to underline. We don't underline trailing spaces
// if the TrimTrailingUnderline flag is set.
int underlineLength = Length;
if (TrimTrailingUnderline)
{
while (underlineLength > 0 && IsSpace(charBufferRange[underlineLength - 1]))
{
--underlineLength;
}
}
// Determine the width of the underline.
double dxUnderline = 0;
for (int i = 0; i < underlineLength; ++i)
{
dxUnderline += _textFormatterImp.IdealToReal(NominalAdvances[i]);
}
// We know only TextDecoration.Underline will be handled in Simple Path.
double offset = -Typeface.UnderlinePosition * EmSize;
double penThickness = Typeface.UnderlineThickness * EmSize;
Point lineOrigin = new Point(x, y + offset);
Rect underlineRect = new Rect(
lineOrigin.X,
lineOrigin.Y - penThickness * 0.5,
dxUnderline,
penThickness
);
// Apply the pair of guidelines: one for baseline and another
// for top edge of undelining line. Both will be snapped to pixel grid.
// Guideline pairing algorithm detects the case when these two
// guidelines happen to be close to one another and provides
// synchronous snapping, so that the gap between baseline and
// undelining line does not depend on the position of text line.
drawingContext.PushGuidelineY2(y, lineOrigin.Y - penThickness * 0.5 - y);
try
{
drawingContext.DrawRectangle(
foregroundBrush,
null, // pen
underlineRect
);
}
finally
{
drawingContext.Pop();
}
// underline pen thickness is always positive in fast path
inkBoundingBox.Union(
underlineRect
);
}
}
return inkBoundingBox;
}
