internal sealed override unsafe void GetAdvanceWidthsUnshaped(
char *characterString,
int characterLength,
double scalingFactor,
int *advanceWidthsUnshaped
)
{
if (!IsShapingRequired)
{
if ((_shapeTypeface != null) &&
(_shapeTypeface.DeviceFont != null))
{
// Use device font to compute advance widths
_shapeTypeface.DeviceFont.GetAdvanceWidths(
characterString,
characterLength,
_emSize * scalingFactor,
advanceWidthsUnshaped
);
}
else
{
bool nullFont;
GlyphTypeface glyphTypeface = GetGlyphTypeface(out nullFont);
Invariant.Assert(glyphTypeface != null);
glyphTypeface.GetAdvanceWidthsUnshaped(
characterString,
characterLength,
_emSize,
(float)_properties.PixelsPerDip,
scalingFactor,
advanceWidthsUnshaped,
nullFont,
_textFormattingMode,
_isSideways
);
}
}
else
{
GlyphTypeface glyphTypeface = _shapeTypeface.GlyphTypeface;
Invariant.Assert(glyphTypeface != null);
Invariant.Assert(characterLength > 0);
CharacterBufferRange newBuffer = new CharacterBufferRange(characterString, characterLength);
MS.Internal.Text.TextInterface.GlyphMetrics[] glyphMetrics = BufferCache.GetGlyphMetrics(characterLength);
glyphTypeface.GetGlyphMetricsOptimized(newBuffer,
_emSize,
(float)_properties.PixelsPerDip,
_textFormattingMode,
_isSideways,
glyphMetrics
);
if (_textFormattingMode == TextFormattingMode.Display &&
TextFormatterContext.IsSpecialCharacter(*characterString))
{
// (DDVSO 92892) If the run starts with a special character (in
// the LineServices sense), we apply display-mode rounding now,
// as we won't get another chance. This assumes that the characters
// in a run are either all special or all non-special; that assumption
// is valid in the current LS implementation.
double designToEm = _emSize / glyphTypeface.DesignEmHeight;
double pixelsPerDip = _properties.PixelsPerDip;
for (int i = 0; i < characterLength; i++)
{
advanceWidthsUnshaped[i] = (int)Math.Round(TextFormatterImp.RoundDipForDisplayMode(glyphMetrics[i].AdvanceWidth * designToEm, pixelsPerDip) * scalingFactor);
}
}
else
{
// For the normal case, rounding is applied later on when LS
// invokes the callback GetGlyphPositions, so that adjustments
// due to justification and shaping are taken into account.
double designToEm = _emSize * scalingFactor / glyphTypeface.DesignEmHeight;
for (int i = 0; i < characterLength; i++)
{
advanceWidthsUnshaped[i] = (int)Math.Round(glyphMetrics[i].AdvanceWidth * designToEm);
}
}
BufferCache.ReleaseGlyphMetrics(glyphMetrics);
}
}
internal sealed override unsafe void GetAdvanceWidthsUnshaped(
char *characterString,
int characterLength,
double scalingFactor,
int *advanceWidthsUnshaped
)
{
if (!IsShapingRequired)
{
if ((_shapeTypeface != null) &&
(_shapeTypeface.DeviceFont != null))
{
// Use device font to compute advance widths
_shapeTypeface.DeviceFont.GetAdvanceWidths(
characterString,
characterLength,
_emSize * scalingFactor,
advanceWidthsUnshaped
);
}
else
{
bool nullFont;
GlyphTypeface glyphTypeface = GetGlyphTypeface(out nullFont);
Invariant.Assert(glyphTypeface != null);
glyphTypeface.GetAdvanceWidthsUnshaped(
characterString,
characterLength,
_emSize,
scalingFactor,
advanceWidthsUnshaped,
nullFont,
_textFormattingMode,
_isSideways
);
}
}
else
{
GlyphTypeface glyphTypeface = _shapeTypeface.GlyphTypeface;
Invariant.Assert(glyphTypeface != null);
Invariant.Assert(characterLength > 0);
CharacterBufferRange newBuffer = new CharacterBufferRange(characterString, characterLength);
MS.Internal.Text.TextInterface.GlyphMetrics[] glyphMetrics = BufferCache.GetGlyphMetrics(characterLength);
glyphTypeface.GetGlyphMetricsOptimized(newBuffer,
_emSize,
_textFormattingMode,
_isSideways,
glyphMetrics
);
double designToEm = _emSize * scalingFactor / glyphTypeface.DesignEmHeight;
for (int i = 0; i < characterLength; i++)
{
advanceWidthsUnshaped[i] = (int)Math.Round(glyphMetrics[i].AdvanceWidth * designToEm);
}
BufferCache.ReleaseGlyphMetrics(glyphMetrics);
}
}