private void EnsureTypographyList(TypographyHandler typographyHandler)
{
if (!needRefreshTypographyList)
{
return;
}
textLayout.DrawToTextRenderer(typographyHandler, 0, 0);
TypographyOptions = typographyHandler.TypographyOptions;
TypographyFeatureInfo previousOption = CurrentTypographyOption;
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("TypographyOptions"));
}
if (TypographyOptions.Contains(previousOption))
{
CurrentTypographyOption = previousOption;
}
else
{
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.None);
}
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs("CurrentTypographyOption"));
}
needRefreshTypographyList = false;
}
public TypographyExample()
{
DataContext = this;
this.InitializeComponent();
TypographyOptions = new List <TypographyFeatureInfo>();
if (ThumbnailGenerator.IsDrawingThumbnail)
{
fontPicker.SelectFont("Gabriola");
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.StylisticSet2);
}
else
{
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.Kerning);
}
HighlightTypographyAffectedGlyphs = true;
}
public void DrawGlyphRun(
Vector2 position,
CanvasFontFace fontFace,
float fontSize,
CanvasGlyph[] glyphs,
bool isSideways,
uint bidiLevel,
object brush,
CanvasTextMeasuringMode measuringMode,
string locale,
string textString,
int[] clusterMapIndices,
uint textPosition,
CanvasGlyphOrientation glyphOrientation)
{
var script = GetScript(textPosition);
if (CurrentMode == Mode.BuildTypographyList)
{
CanvasTypographyFeatureName[] features = fontFace.GetSupportedTypographicFeatureNames(script);
foreach (var featureName in features)
{
TypographyFeatureInfo featureInfo = new TypographyFeatureInfo(featureName);
if (!TypographyOptions.Contains(featureInfo))
{
TypographyOptions.Add(featureInfo);
}
}
}
else
{
if (glyphs == null || glyphs.Length == 0)
{
return;
}
//
// This demo handles only simple Latin text with no diacritical
// markers or ligatures, so we can make assumptions about the
// mapping of text positions to glyph indices. This works fine for
// the sake of this example.
//
// In general, apps should use the cluster map to map text
// positions to glyphs while knowing that glyph substitution can happen
// for reasons besides typography.
//
uint[] codePoints = new uint[glyphs.Length];
for (int i = 0; i < glyphs.Length; i++)
{
int glyphTextPosition = 0;
for (int j = 0; j < clusterMapIndices.Length; j++)
{
if (clusterMapIndices[j] == i)
{
glyphTextPosition = j;
break;
}
}
codePoints[i] = textString[glyphTextPosition];
}
int[] nominalGlyphIndices = fontFace.GetGlyphIndices(codePoints);
CanvasGlyph[] unsubstitutedGlyphs = new CanvasGlyph[glyphs.Length];
for (int i = 0; i < glyphs.Length; i++)
{
unsubstitutedGlyphs[i] = glyphs[i];
unsubstitutedGlyphs[i].Index = nominalGlyphIndices[i];
}
bool[] eligible = fontFace.GetTypographicFeatureGlyphSupport(script, FeatureToHighlight, unsubstitutedGlyphs);
var highlightBrush = new CanvasSolidColorBrush(currentDrawingSession, Colors.Yellow);
for (int i = 0; i < glyphs.Length; ++i)
{
if (eligible[i])
{
CanvasGlyph[] singleGlyph = new CanvasGlyph[1];
singleGlyph[0] = glyphs[i];
currentDrawingSession.DrawGlyphRun(
position,
fontFace,
fontSize,
singleGlyph,
isSideways,
bidiLevel,
highlightBrush);
}
position.X += glyphs[i].Advance;
}
}
}
public void DrawGlyphRun(
Vector2 position,
CanvasFontFace fontFace,
float fontSize,
CanvasGlyph[] glyphs,
bool isSideways,
uint bidiLevel,
object brush,
CanvasTextMeasuringMode measuringMode,
string locale,
string textString,
int[] clusterMapIndices,
uint textPosition,
CanvasGlyphOrientation glyphOrientation)
{
var script = GetScript(textPosition);
if (CurrentMode == Mode.BuildTypographyList)
{
CanvasTypographyFeatureName[] features = fontFace.GetSupportedTypographicFeatureNames(script);
foreach (var featureName in features)
{
TypographyFeatureInfo featureInfo = new TypographyFeatureInfo(featureName);
if (!TypographyOptions.Contains(featureInfo))
{
TypographyOptions.Add(featureInfo);
}
}
}
else
{
if (glyphs == null || glyphs.Length == 0)
return;
//
// This demo handles only simple Latin text with no diacritical
// markers or ligatures, so we can make assumptions about the
// mapping of text positions to glyph indices. This works fine for
// the sake of this example.
//
// In general, apps should use the cluster map to map text
// positions to glyphs while knowing that glyph substitution can happen
// for reasons besides typography.
//
uint[] codePoints = new uint[glyphs.Length];
for (int i = 0; i < glyphs.Length; i++)
{
int glyphTextPosition = 0;
for (int j=0; j<clusterMapIndices.Length; j++)
{
if (clusterMapIndices[j] == i)
{
glyphTextPosition = j;
break;
}
}
codePoints[i] = textString[glyphTextPosition];
}
int[] nominalGlyphIndices = fontFace.GetGlyphIndices(codePoints);
CanvasGlyph[] unsubstitutedGlyphs = new CanvasGlyph[glyphs.Length];
for (int i = 0; i < glyphs.Length; i++)
{
unsubstitutedGlyphs[i] = glyphs[i];
unsubstitutedGlyphs[i].Index = nominalGlyphIndices[i];
}
bool[] eligible = fontFace.GetTypographicFeatureGlyphSupport(script, FeatureToHighlight, unsubstitutedGlyphs);
var highlightBrush = new CanvasSolidColorBrush(currentDrawingSession, Colors.Yellow);
for (int i = 0; i < glyphs.Length; ++i)
{
if (eligible[i])
{
CanvasGlyph[] singleGlyph = new CanvasGlyph[1];
singleGlyph[0] = glyphs[i];
currentDrawingSession.DrawGlyphRun(
position,
fontFace,
fontSize,
singleGlyph,
isSideways,
bidiLevel,
highlightBrush);
}
position.X += glyphs[i].Advance;
}
}
}
private void EnsureTypographyList(TypographyHandler typographyHandler)
{
if (!needRefreshTypographyList)
return;
textLayout.DrawToTextRenderer(typographyHandler, 0, 0);
TypographyOptions = typographyHandler.TypographyOptions;
TypographyFeatureInfo previousOption = CurrentTypographyOption;
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("TypographyOptions"));
if (TypographyOptions.Contains(previousOption))
CurrentTypographyOption = previousOption;
else
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.None);
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs("CurrentTypographyOption"));
needRefreshTypographyList = false;
}
public TypographyExample()
{
DataContext = this;
this.InitializeComponent();
TypographyOptions = new List<TypographyFeatureInfo>();
if (ThumbnailGenerator.IsDrawingThumbnail)
{
fontPicker.SelectFont("Gabriola");
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.StylisticSet2);
}
else
{
CurrentTypographyOption = new TypographyFeatureInfo(CanvasTypographyFeatureName.Kerning);
}
HighlightTypographyAffectedGlyphs = true;
}
