private void ParseGlyphRunProperties()
{
LayoutDependentGlyphRunProperties glyphRunProperties = null;
Uri uri = FontUri;
if (uri != null)
{
// Indices and UnicodeString cannot both be empty.
if (String.IsNullOrEmpty(UnicodeString) && String.IsNullOrEmpty(Indices))
throw new ArgumentException(SR.Get(SRID.GlyphsUnicodeStringAndIndicesCannotBothBeEmpty));
glyphRunProperties = new LayoutDependentGlyphRunProperties();
if (!uri.IsAbsoluteUri)
{
uri = BindUriHelper.GetResolvedUri(BaseUriHelper.GetBaseUri(this), uri);
}
glyphRunProperties.glyphTypeface = new GlyphTypeface(uri, StyleSimulations);
glyphRunProperties.unicodeString = UnicodeString;
glyphRunProperties.sideways = IsSideways;
glyphRunProperties.deviceFontName = DeviceFontName;
// parse the Indices property
List<ParsedGlyphData> parsedGlyphs;
int glyphCount = ParseGlyphsProperty(
glyphRunProperties.glyphTypeface,
glyphRunProperties.unicodeString,
glyphRunProperties.sideways,
out parsedGlyphs,
out glyphRunProperties.clusterMap);
Debug.Assert(parsedGlyphs.Count == glyphCount);
glyphRunProperties.glyphIndices = new ushort[glyphCount];
glyphRunProperties.advanceWidths = new double[glyphCount];
ParseCaretStops(glyphRunProperties);
// Delay creating glyphOffsets array because in many common cases it will contain only zeroed entries.
glyphRunProperties.glyphOffsets = null;
int i = 0;
glyphRunProperties.fontRenderingSize = FontRenderingEmSize;
glyphRunProperties.bidiLevel = BidiLevel;
double fromEmToMil = glyphRunProperties.fontRenderingSize / EmMultiplier;
foreach (ParsedGlyphData parsedGlyphData in parsedGlyphs)
{
glyphRunProperties.glyphIndices[i] = parsedGlyphData.glyphIndex;
// convert advances and offsets from integers in em space to doubles coordinates in MIL space
glyphRunProperties.advanceWidths[i] = parsedGlyphData.advanceWidth * fromEmToMil;
if (parsedGlyphData.offsetX != 0 || parsedGlyphData.offsetY != 0)
{
// Lazily create glyph offset array. Previous entries will be correctly set to zero
// by the default Point ctor.
if (glyphRunProperties.glyphOffsets == null)
glyphRunProperties.glyphOffsets = new Point[glyphCount];
glyphRunProperties.glyphOffsets[i].X = parsedGlyphData.offsetX * fromEmToMil;
glyphRunProperties.glyphOffsets[i].Y = parsedGlyphData.offsetY * fromEmToMil;
}
++i;
}
}
_glyphRunProperties = glyphRunProperties;
}
private void ParseGlyphRunProperties()
{
LayoutDependentGlyphRunProperties glyphRunProperties = null;
Uri uri = FontUri;
if (uri != null)
{
// Indices and UnicodeString cannot both be empty.
if (String.IsNullOrEmpty(UnicodeString) && String.IsNullOrEmpty(Indices))
{
throw new ArgumentException(SR.Get(SRID.GlyphsUnicodeStringAndIndicesCannotBothBeEmpty));
}
glyphRunProperties = new LayoutDependentGlyphRunProperties(GetDpi().PixelsPerDip);
if (!uri.IsAbsoluteUri)
{
uri = BindUriHelper.GetResolvedUri(BaseUriHelper.GetBaseUri(this), uri);
}
glyphRunProperties.glyphTypeface = new GlyphTypeface(uri, StyleSimulations);
glyphRunProperties.unicodeString = UnicodeString;
glyphRunProperties.sideways = IsSideways;
glyphRunProperties.deviceFontName = DeviceFontName;
// parse the Indices property
List <ParsedGlyphData> parsedGlyphs;
int glyphCount = ParseGlyphsProperty(
glyphRunProperties.glyphTypeface,
glyphRunProperties.unicodeString,
glyphRunProperties.sideways,
out parsedGlyphs,
out glyphRunProperties.clusterMap);
Debug.Assert(parsedGlyphs.Count == glyphCount);
glyphRunProperties.glyphIndices = new ushort[glyphCount];
glyphRunProperties.advanceWidths = new double[glyphCount];
ParseCaretStops(glyphRunProperties);
// Delay creating glyphOffsets array because in many common cases it will contain only zeroed entries.
glyphRunProperties.glyphOffsets = null;
int i = 0;
glyphRunProperties.fontRenderingSize = FontRenderingEmSize;
glyphRunProperties.bidiLevel = BidiLevel;
double fromEmToMil = glyphRunProperties.fontRenderingSize / EmMultiplier;
foreach (ParsedGlyphData parsedGlyphData in parsedGlyphs)
{
glyphRunProperties.glyphIndices[i] = parsedGlyphData.glyphIndex;
// convert advances and offsets from integers in em space to doubles coordinates in MIL space
glyphRunProperties.advanceWidths[i] = parsedGlyphData.advanceWidth * fromEmToMil;
if (parsedGlyphData.offsetX != 0 || parsedGlyphData.offsetY != 0)
{
// Lazily create glyph offset array. Previous entries will be correctly set to zero
// by the default Point ctor.
if (glyphRunProperties.glyphOffsets == null)
{
glyphRunProperties.glyphOffsets = new Point[glyphCount];
}
glyphRunProperties.glyphOffsets[i].X = parsedGlyphData.offsetX * fromEmToMil;
glyphRunProperties.glyphOffsets[i].Y = parsedGlyphData.offsetY * fromEmToMil;
}
++i;
}
}
_glyphRunProperties = glyphRunProperties;
}
private void ParseCaretStops(LayoutDependentGlyphRunProperties glyphRunProperties)
{
string caretStopsString = CaretStops;
if (String.IsNullOrEmpty(caretStopsString))
{
glyphRunProperties.caretStops = null;
return;
}
// Caret stop count should be equal to the number of UTF16 code points in the glyph run plus one.
// Logic below is similar to GlyphRun.CodepointCount property.
int caretStopCount;
if (!String.IsNullOrEmpty(glyphRunProperties.unicodeString))
caretStopCount = glyphRunProperties.unicodeString.Length + 1;
else
{
if (glyphRunProperties.clusterMap != null && glyphRunProperties.clusterMap.Length != 0)
caretStopCount = glyphRunProperties.clusterMap.Length + 1;
else
{
Debug.Assert(glyphRunProperties.glyphIndices != null);
caretStopCount = glyphRunProperties.glyphIndices.Length + 1;
}
}
bool[] caretStops = new bool[caretStopCount];
int i = 0;
foreach (char c in caretStopsString)
{
if (Char.IsWhiteSpace(c))
continue;
int nibble;
if ('0' <= c && c <= '9')
nibble = c - '0';
else if ('a' <= c && c <= 'f')
nibble = c - 'a' + 10;
else if ('A' <= c && c <= 'F')
nibble = c - 'A' + 10;
else
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsContainsHexDigits), "CaretStops");
Debug.Assert(0 <= nibble && nibble <= 15);
if ((nibble & 8) != 0)
{
if (i >= caretStops.Length)
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
caretStops[i] = true;
}
++i;
if ((nibble & 4) != 0)
{
if (i >= caretStops.Length)
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
caretStops[i] = true;
}
++i;
if ((nibble & 2) != 0)
{
if (i >= caretStops.Length)
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
caretStops[i] = true;
}
++i;
if ((nibble & 1) != 0)
{
if (i >= caretStops.Length)
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
caretStops[i] = true;
}
++i;
}
// If the number of entries in the caret stop specification string is less than the number of code points,
// set the remaining caret stop values to true.
while (i < caretStops.Length)
{
caretStops[i++] = true;
}
glyphRunProperties.caretStops = caretStops;
}
private void ParseCaretStops(LayoutDependentGlyphRunProperties glyphRunProperties)
{
string caretStopsString = CaretStops;
if (String.IsNullOrEmpty(caretStopsString))
{
glyphRunProperties.caretStops = null;
return;
}
// Caret stop count should be equal to the number of UTF16 code points in the glyph run plus one.
// Logic below is similar to GlyphRun.CodepointCount property.
int caretStopCount;
if (!String.IsNullOrEmpty(glyphRunProperties.unicodeString))
{
caretStopCount = glyphRunProperties.unicodeString.Length + 1;
}
else
{
if (glyphRunProperties.clusterMap != null && glyphRunProperties.clusterMap.Length != 0)
{
caretStopCount = glyphRunProperties.clusterMap.Length + 1;
}
else
{
Debug.Assert(glyphRunProperties.glyphIndices != null);
caretStopCount = glyphRunProperties.glyphIndices.Length + 1;
}
}
bool[] caretStops = new bool[caretStopCount];
int i = 0;
foreach (char c in caretStopsString)
{
if (Char.IsWhiteSpace(c))
{
continue;
}
int nibble;
if ('0' <= c && c <= '9')
{
nibble = c - '0';
}
else if ('a' <= c && c <= 'f')
{
nibble = c - 'a' + 10;
}
else if ('A' <= c && c <= 'F')
{
nibble = c - 'A' + 10;
}
else
{
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsContainsHexDigits), "CaretStops");
}
Debug.Assert(0 <= nibble && nibble <= 15);
if ((nibble & 8) != 0)
{
if (i >= caretStops.Length)
{
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
}
caretStops[i] = true;
}
++i;
if ((nibble & 4) != 0)
{
if (i >= caretStops.Length)
{
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
}
caretStops[i] = true;
}
++i;
if ((nibble & 2) != 0)
{
if (i >= caretStops.Length)
{
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
}
caretStops[i] = true;
}
++i;
if ((nibble & 1) != 0)
{
if (i >= caretStops.Length)
{
throw new ArgumentException(SR.Get(SRID.GlyphsCaretStopsLengthCorrespondsToUnicodeString), "CaretStops");
}
caretStops[i] = true;
}
++i;
}
// If the number of entries in the caret stop specification string is less than the number of code points,
// set the remaining caret stop values to true.
while (i < caretStops.Length)
{
caretStops[i++] = true;
}
glyphRunProperties.caretStops = caretStops;
}
