public GlyphMetrics[] GetGlyphMetrics(MyScript.IInk.Text.Text text, TextSpan[] spans)
{
var glyphMetrics = new List <GlyphMetrics>();
GetGlyphMetrics(text, spans, glyphMetrics);
return(glyphMetrics.ToArray());
}
public Rectangle[] GetCharacterBoundingBoxes(MyScript.IInk.Text.Text text, TextSpan[] spans)
{
var glyphMetrics = GetGlyphMetrics(text, spans);
Rectangle[] rectangles = new Rectangle[glyphMetrics.Length];
for (int i = 0; i < glyphMetrics.Length; ++i)
{
rectangles[i] = glyphMetrics[i].BoundingBox;
}
return(rectangles);
}
public Rectangle[] GetCharacterBoundingBoxes(MyScript.IInk.Text.Text text, TextSpan[] spans)
{
List <Rectangle> rectangles = new List <Rectangle>();
if (Thread.CurrentThread == Application.Current.Dispatcher.Thread)
{
GetCharacterBoundingBoxes_(text, spans, rectangles, dpiX, dpiY);
}
else
{
Application.Current.Dispatcher.BeginInvoke(new Action(() => { GetCharacterBoundingBoxes_(text, spans, rectangles, dpiX, dpiY); })).Wait();
}
return(rectangles.ToArray());
}
public Rectangle[] GetCharacterBoundingBoxes(MyScript.IInk.Text.Text text, TextSpan[] spans)
{
var glyphMetrics = new List <GlyphMetrics>();
var rectangles = new List <Rectangle>();
GetGlyphMetrics(text, spans, glyphMetrics);
foreach (var metrics in glyphMetrics)
{
rectangles.Add(metrics.BoundingBox);
}
return(rectangles.ToArray());
}
private static void GetCharacterBoundingBoxes_(MyScript.IInk.Text.Text text, TextSpan[] spans, List <Rectangle> rectangles, float dpiX, float dpiY)
{
var firstStyle = spans.First().Style;
var textBlock = new TextBlock();
textBlock.FontFamily = new FontFamily(firstStyle.FontFamily);
textBlock.Padding = new Thickness(0.0);
textBlock.Margin = new Thickness(0.0);
textBlock.TextWrapping = TextWrapping.NoWrap;
textBlock.HorizontalAlignment = HorizontalAlignment.Left;
textBlock.VerticalAlignment = VerticalAlignment.Top;
foreach (var textSpan in spans)
{
var fontFamily = new FontFamily(textSpan.Style.FontFamily);
var fontSize = mm2px(textSpan.Style.FontSize, dpiY);
var fontWeight = FontWeight.FromOpenTypeWeight(textSpan.Style.FontWeight);
var fontStretch = FontStretches.Normal;
var fontStyle = FontStyles.Normal;
if (textSpan.Style.FontStyle.Equals("italic"))
{
fontStyle = FontStyles.Italic;
}
else if (textSpan.Style.FontStyle.Equals("oblique"))
{
fontStyle = FontStyles.Oblique;
}
if (textSpan.Style.FontWeight >= 700)
{
fontWeight = FontWeights.Bold;
}
else if (textSpan.Style.FontWeight >= 400)
{
fontWeight = FontWeights.Normal;
}
else
{
fontWeight = FontWeights.Light;
}
// Process glyph one by one to generate one box per glyph
for (int j = textSpan.BeginPosition; j < textSpan.EndPosition; ++j)
{
var textRun = new Run(text.GetGlyphLabelAt(j));
textRun.FontFamily = fontFamily;
textRun.FontSize = fontSize;
textRun.FontWeight = fontWeight;
textRun.FontStyle = fontStyle;
textRun.FontStretch = fontStretch;
textBlock.Inlines.Add(textRun);
}
}
textBlock.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
textBlock.Arrange(new Rect(textBlock.DesiredSize));
var baseline = (float)textBlock.BaselineOffset;
var d = VisualTreeHelper.GetDrawing(textBlock);
WalkDrawingForText(d, rectangles, baseline, dpiX, dpiY);
}
private void GetGlyphMetrics(MyScript.IInk.Text.Text text, TextSpan[] spans, List <GlyphMetrics> glyphMetrics)
{
// Process glyph one by one to generate one box per glyph
for (int s = 0; s < spans.Length; ++s)
{
var textSpan = spans[s];
var fontKey = FontKeyFromStyle(textSpan.Style);
for (int j = textSpan.BeginPosition; j < textSpan.EndPosition; ++j)
{
var glyphLabel = text.GetGlyphLabelAt(j);
var glyphMetrics_ = GetGlyphMetrics(fontKey, glyphLabel);
glyphMetrics.Add(glyphMetrics_);
}
}
if (glyphMetrics.Count == 0)
{
return;
}
// Draw text to get data for glyphs
FormattedText formattedText;
{
var firstStyle = spans[0].Style;
var firstFontKey = FontKeyFromStyle(firstStyle);
var firstFontTypeFace = new Typeface(firstFontKey.FontFamily, firstFontKey.FontStyle, firstFontKey.FontWeight, firstFontKey.FontStretch);
formattedText = new FormattedText
(
text.Label, System.Globalization.CultureInfo.CurrentCulture,
FlowDirection.LeftToRight, firstFontTypeFace, firstFontKey.FontSize,
Brushes.Black
);
formattedText.TextAlignment = TextAlignment.Left;
for (int s = 0; s < spans.Length; ++s)
{
var textSpan = spans[s];
var charIndex = textSpan.BeginPosition;
var charCount = textSpan.EndPosition - textSpan.BeginPosition;
var fontKey = FontKeyFromStyle(textSpan.Style);
var fontTypeFace = new Typeface(fontKey.FontFamily, fontKey.FontStyle, fontKey.FontWeight, fontKey.FontStretch);
formattedText.SetFontFamily(fontKey.FontFamily, charIndex, charCount);
formattedText.SetFontSize(fontKey.FontSize, charIndex, charCount);
formattedText.SetFontWeight(fontKey.FontWeight, charIndex, charCount);
formattedText.SetFontStretch(fontKey.FontStretch, charIndex, charCount);
formattedText.SetFontStyle(fontKey.FontStyle, charIndex, charCount);
formattedText.SetFontTypeface(fontTypeFace, charIndex, charCount);
}
}
var drawing = new DrawingGroup();
{
var ctx = drawing.Open();
ctx.DrawText(formattedText, new System.Windows.Point(0.0, 0.0));
ctx.Close();
}
// Apply baseline and offsets of glyphs to bounding boxes
float baseline = (float)formattedText.Baseline;
WalkDrawingForText(drawing, glyphMetrics, baseline);
}
public GlyphMetrics[] GetGlyphMetrics(MyScript.IInk.Text.Text text, TextSpan[] spans)
{
CanvasDevice canvasDevice = CanvasDevice.GetSharedDevice();
GlyphMetrics[] glyphMetrics = new GlyphMetrics[text.GlyphCount];
var firstStyle = spans[0].Style;
var firstFontKey = FontKeyFromStyle(firstStyle);
if (text.GlyphCount == 1)
{
glyphMetrics[0] = GetGlyphMetrics(firstFontKey, text.Label, canvasDevice);
}
else
{
var textFormat = new CanvasTextFormat()
{
FontSize = mm2px(firstStyle.FontSize, dpiY),
FontFamily = firstStyle.FontFamily,
FontStyle = firstFontKey.FontStyle,
FontWeight = firstFontKey.FontWeight
};
using (var canvasTextLayout = new CanvasTextLayout(canvasDevice, text.Label, textFormat, 10000, 10000))
{
for (int i = 0; i < spans.Length; ++i)
{
var charIndex = spans[i].BeginPosition;
var charCount = spans[i].EndPosition - spans[i].BeginPosition;
var style = spans[i].Style;
var fontKey = FontKeyFromStyle(style);
canvasTextLayout.SetFontFamily(charIndex, charCount, fontKey.FontFamily);
canvasTextLayout.SetFontSize(charIndex, charCount, fontKey.FontSize);
canvasTextLayout.SetFontWeight(charIndex, charCount, fontKey.FontWeight);
canvasTextLayout.SetFontStyle(charIndex, charCount, fontKey.FontStyle);
}
// Use of TextElementEnumerator to get character indices as in the CanvasTextLayout
var tee = StringInfo.GetTextElementEnumerator(text.Label);
// Use of ClusterMetrics to identify ligatures in the CanvasTextLayout
int cluster = 0;
int clusterStartChar = 0;
var clusterCharCount = canvasTextLayout.ClusterMetrics[cluster].CharacterCount;
for (int i = 0, g = 0; i < text.GlyphCount; ++i)
{
var fontKey = new FontKey(canvasTextLayout.GetFontFamily(i)
, canvasTextLayout.GetFontSize(i)
, canvasTextLayout.GetFontWeight(i)
, canvasTextLayout.GetFontStyle(i));
var glyphLabel = text.GetGlyphLabelAt(i);
var glyphMetrics_ = GetGlyphMetrics(fontKey, glyphLabel, canvasDevice);
// Find cluster associated to element
if (tee.MoveNext())
{
g = tee.ElementIndex;
}
while ((g < clusterStartChar) || (g >= (clusterStartChar + clusterCharCount)))
{
++cluster;
clusterStartChar += clusterCharCount;
clusterCharCount = canvasTextLayout.ClusterMetrics[cluster].CharacterCount;
}
if (g > clusterStartChar)
{
// Ligature with the previous glyph
// The position is not accurate because of glyphs substitution at rendering
// but it makes the illusion.
var prevGlyphMetrics = glyphMetrics[i - 1];
glyphMetrics_.BoundingBox.X = prevGlyphMetrics.BoundingBox.X
+ prevGlyphMetrics.BoundingBox.Width
+ prevGlyphMetrics.RightSideBearing
+ glyphMetrics_.LeftSideBearing;
}
else
{
var charPos = canvasTextLayout.GetCaretPosition(g, false);
glyphMetrics_.BoundingBox.X += px2mm(charPos.X, dpiX);
}
glyphMetrics[i] = glyphMetrics_;
}
}
}
return(glyphMetrics);
}
private static void GetGlyphMetrics_(MyScript.IInk.Text.Text text, TextSpan[] spans, List <GlyphMetrics> glyphMetrics, float dpiX, float dpiY)
{
var drawing = new DrawingGroup();
var ctx = drawing.Open();
float baseline = 0.0f;
int spanCount = 0;
foreach (var textSpan in spans)
{
var fontFamily = new FontFamily(textSpan.Style.FontFamily);
var fontSize = mm2px(textSpan.Style.FontSize, dpiY);
var fontWeight = FontWeight.FromOpenTypeWeight(textSpan.Style.FontWeight);
var fontStretch = FontStretches.Normal;
var fontStyle = FontStyles.Normal;
if (textSpan.Style.FontStyle.Equals("italic"))
{
fontStyle = FontStyles.Italic;
}
else if (textSpan.Style.FontStyle.Equals("oblique"))
{
fontStyle = FontStyles.Oblique;
}
if (textSpan.Style.FontWeight >= 700)
{
fontWeight = FontWeights.Bold;
}
else if (textSpan.Style.FontWeight >= 400)
{
fontWeight = FontWeights.Normal;
}
else
{
fontWeight = FontWeights.Light;
}
var typeFace = new Typeface(fontFamily, fontStyle, fontWeight, fontStretch);
// Process glyph one by one to generate one box per glyph
var label = "";
for (int j = textSpan.BeginPosition; j < textSpan.EndPosition; ++j)
{
var glyphLabel = text.GetGlyphLabelAt(j);
var formattedText = new FormattedText
(
glyphLabel, System.Globalization.CultureInfo.CurrentCulture,
FlowDirection.LeftToRight, typeFace, fontSize, Brushes.Black
);
formattedText.TextAlignment = TextAlignment.Left;
var geometry = formattedText.BuildGeometry(new System.Windows.Point(0.0f, 0.0f));
var rect = geometry.Bounds;
// For glyph without geometry (space)
if (rect.IsEmpty)
{
rect = new Rect(0.0, 0.0, formattedText.Width, formattedText.Height);
}
var rectX = (float)rect.X;
var rectY = (float)rect.Y;
var rectW = (float)rect.Width;
var rectH = (float)rect.Height;
var leftBearing = -(float)(rect.X);
var rightBearing = 0.0f;
var glyphX = px2mm(rectX, dpiX);
var glyphY = px2mm(rectY, dpiY);
var glyphW = px2mm(rectW, dpiX);
var glyphH = px2mm(rectH, dpiY);
var glyphRect = new Rectangle(glyphX, glyphY, glyphW, glyphH);
var glyphLeftBearing = px2mm(leftBearing, dpiX);
var glyphRightBearing = px2mm(rightBearing, dpiX);
glyphMetrics.Add(new GlyphMetrics(glyphRect, glyphLeftBearing, glyphRightBearing));
label += glyphLabel;
}
// Draw current span
{
var formattedText = new FormattedText
(
label, System.Globalization.CultureInfo.CurrentCulture,
FlowDirection.LeftToRight, typeFace, fontSize, Brushes.Black
);
formattedText.TextAlignment = TextAlignment.Left;
if (spanCount == 0)
{
baseline = (float)formattedText.Baseline;
}
ctx.DrawText(formattedText, new System.Windows.Point(0.0, 0.0));
}
++spanCount;
}
ctx.Close();
// Apply baseline and offsets of glyphs to bounding boxes
if (glyphMetrics.Count > 0)
{
WalkDrawingForText(drawing, glyphMetrics, baseline, dpiX, dpiY);
}
}
public GlyphMetrics[] GetGlyphMetrics(MyScript.IInk.Text.Text text, TextSpan[] spans)
{
CanvasDevice canvasDevice = CanvasDevice.GetSharedDevice();
GlyphMetrics[] glyphMetrics = new GlyphMetrics[text.GlyphCount];
var firstStyle = spans[0].Style;
var firstFontKey = FontKeyFromStyle(firstStyle);
if (text.GlyphCount == 1)
{
glyphMetrics[0] = GetGlyphMetrics(firstFontKey, text.Label, canvasDevice);
}
else
{
var textFormat = new CanvasTextFormat()
{
FontSize = firstFontKey.FontSize,
FontFamily = firstFontKey.FontFamily,
FontStyle = firstFontKey.FontStyle,
FontWeight = firstFontKey.FontWeight,
WordWrapping = CanvasWordWrapping.NoWrap,
Options = UseColorFont ? CanvasDrawTextOptions.EnableColorFont : CanvasDrawTextOptions.Default
};
using (var canvasTextLayout = new CanvasTextLayout(canvasDevice, text.Label, textFormat, 0.0f, 0.0f))
{
for (int i = 0; i < spans.Length; ++i)
{
var charIndex = text.GetGlyphBeginAt(spans[i].BeginPosition);
var charCount = text.GetGlyphEndAt(spans[i].EndPosition - 1) - charIndex;
var style = spans[i].Style;
var fontKey = FontKeyFromStyle(style);
canvasTextLayout.SetFontFamily(charIndex, charCount, fontKey.FontFamily);
canvasTextLayout.SetFontSize(charIndex, charCount, fontKey.FontSize);
canvasTextLayout.SetFontWeight(charIndex, charCount, fontKey.FontWeight);
canvasTextLayout.SetFontStyle(charIndex, charCount, fontKey.FontStyle);
}
for (int i = 0; i < text.GlyphCount; ++i)
{
var glyphLabel = text.GetGlyphLabelAt(i);
var glyphCharStart = text.GetGlyphBeginAt(i);
var glyphCharEnd = text.GetGlyphEndAt(i);
var glyphFontKey = new FontKey(canvasTextLayout.GetFontFamily(glyphCharStart)
, canvasTextLayout.GetFontSize(glyphCharStart)
, canvasTextLayout.GetFontWeight(glyphCharStart)
, canvasTextLayout.GetFontStyle(glyphCharStart));
var glyphMetrics_ = GetGlyphMetrics(glyphFontKey, glyphLabel, canvasDevice);
// Find cluster associated to element
// (Use of ClusterMetrics to identify ligatures in the CanvasTextLayout)
int cluster = -1;
int clusterCharStart = 0;
if (canvasTextLayout.ClusterMetrics != null)
{
for (int c = 0; c < canvasTextLayout.ClusterMetrics.Length; ++c)
{
var clusterCharCount = canvasTextLayout.ClusterMetrics[c].CharacterCount;
if ((glyphCharStart >= clusterCharStart) && (glyphCharStart < (clusterCharStart + clusterCharCount)))
{
cluster = c;
break;
}
clusterCharStart += clusterCharCount;
}
}
if ((i > 0) && (cluster >= 0) && (glyphCharStart > clusterCharStart))
{
// Ligature with the previous glyph
// The position is not accurate because of glyphs substitution at rendering
// but it makes the illusion.
var prevGlyphMetrics = glyphMetrics[i - 1];
glyphMetrics_.BoundingBox.X = prevGlyphMetrics.BoundingBox.X
+ prevGlyphMetrics.BoundingBox.Width
+ prevGlyphMetrics.RightSideBearing
+ glyphMetrics_.LeftSideBearing;
}
else
{
float glyphX = 0.0f;
var charRegions = canvasTextLayout.GetCharacterRegions(glyphCharStart, glyphCharEnd - glyphCharStart);
if ((charRegions != null) && (charRegions.Length > 0))
{
glyphX = (float)charRegions[0].LayoutBounds.X;
}
else
{
var glyphPos = canvasTextLayout.GetCaretPosition(glyphCharStart, false);
glyphX = (float)glyphPos.X;
}
glyphMetrics_.BoundingBox.X += px2mm(glyphX, dpiX);
}
glyphMetrics[i] = glyphMetrics_;
}
}
}
return(glyphMetrics);
}
