/// <summary>
/// Create an anti-inversion transform from the inversion flags.
/// The result is used to correct glyph bitmap on an output to
/// a drawing surface with the specified inversions applied on.
/// </summary>
internal static MatrixTransform CreateAntiInversionTransform(
InvertAxes inversion,
double paragraphWidth,
double lineHeight
)
{
if (inversion == InvertAxes.None)
{
// avoid creating unncessary pressure on GC when anti-transform is not needed.
return(null);
}
double m11 = 1;
double m22 = 1;
double offsetX = 0;
double offsetY = 0;
if ((inversion & InvertAxes.Horizontal) != 0)
{
m11 = -m11;
offsetX = paragraphWidth;
}
if ((inversion & InvertAxes.Vertical) != 0)
{
m22 = -m22;
offsetY = lineHeight;
}
return(new MatrixTransform(m11, 0, 0, m22, offsetX, offsetY));
}
public override void Draw(DrawingContext drawingContext, Point origin, InvertAxes inversion)
{
foreach (var entry in entries)
{
if (entry.Item2 == null)
{
continue;
}
if (entry.Item3 == entry.Item1.Length) // All whitespace, no need to render
{
continue;
}
var textRun = entry.Item1;
var glyphRun = entry.Item2;
var textProps = textRun.Properties;
var newRun = Clone(glyphRun, new Point {
X = origin.X + glyphRun.BaselineOrigin.X,
Y = (int)(origin.Y + glyphRun.GlyphTypeface.Baseline * textProps.FontRenderingEmSize)
});
if (_textFormattingMode != null)
{
_textFormattingMode.SetValue(glyphRun, mode);
}
var box = newRun.ComputeAlignmentBox();
if (textProps.BackgroundBrush != null)
{
drawingContext.DrawRectangle(
textProps.BackgroundBrush, null,
new Rect(origin, box.Size));
}
drawingContext.DrawGlyphRun(textProps.ForegroundBrush, newRun);
if (textProps.TextDecorations != null)
{
foreach (var deco in textProps.TextDecorations)
{
var thickness = Math.Round(glyphRun.GlyphTypeface.UnderlineThickness * textProps.FontRenderingEmSize);
var pos = glyphRun.GlyphTypeface.UnderlinePosition -
glyphRun.GlyphTypeface.Baseline +
glyphRun.GlyphTypeface.Height;
pos = Math.Round(pos * textProps.FontRenderingEmSize) + thickness / 2;
var pen = new Pen(textProps.ForegroundBrush, thickness);
drawingContext.DrawLine(pen,
new Point(newRun.BaselineOrigin.X, newRun.BaselineOrigin.Y + pos),
new Point(newRun.BaselineOrigin.X + box.Width, newRun.BaselineOrigin.Y + pos));
}
}
}
}
public override void Draw(DrawingContext drawingContext, Point origin, InvertAxes inversion)
{
if (drawingContext == null)
{
throw new ArgumentNullException("drawingContext");
}
if ((_statusFlags & StatusFlags.IsDisposed) != 0)
{
throw new ObjectDisposedException(SR.Get(SRID.TextLineHasBeenDisposed));
}
MatrixTransform antiInversion = TextFormatterImp.CreateAntiInversionTransform(
inversion,
_metrics._formatter.IdealToReal(_paragraphWidth, PixelsPerDip),
_metrics._formatter.IdealToReal(_metrics._height, PixelsPerDip)
);
origin = AdjustOffset(origin);
if (antiInversion == null)
{
DrawTextLine(drawingContext, origin, null);
}
else
{
// Apply anti-inversion transform to correct the visual
drawingContext.PushTransform(antiInversion);
try
{
DrawTextLine(drawingContext, origin, antiInversion);
}
finally
{
drawingContext.Pop();
}
}
}
/// <summary>
/// Client to draw the line
/// </summary>
/// <param name="drawingContext">drawing context</param>
/// <param name="origin">drawing origin</param>
/// <param name="inversion">indicate the inversion of the drawing surface</param>
public abstract void Draw(
DrawingContext drawingContext,
Point origin,
InvertAxes inversion
);
/// <summary>
/// Draw line
/// </summary>
/// <param name="drawingContext">drawing context</param>
/// <param name="origin">drawing origin</param>
/// <param name="inversion">indicate the inversion of the drawing surface</param>
public override void Draw(
DrawingContext drawingContext,
Point origin,
InvertAxes inversion
)
{
if (drawingContext == null)
{
throw new ArgumentNullException("drawingContext");
}
if ((_statusFlags & StatusFlags.IsDisposed) != 0)
{
throw new ObjectDisposedException(SR.Get(SRID.TextLineHasBeenDisposed));
}
MatrixTransform antiInversion = TextFormatterImp.CreateAntiInversionTransform(
inversion,
_metrics._formatter.IdealToReal(_paragraphWidth),
_metrics._formatter.IdealToReal(_metrics._height)
);
if (antiInversion == null)
{
DrawTextLine(drawingContext, origin, null);
}
else
{
// Apply anti-inversion transform to correct the visual
drawingContext.PushTransform(antiInversion);
try
{
DrawTextLine(drawingContext, origin, antiInversion);
}
finally
{
drawingContext.Pop();
}
}
}
/// <summary>
/// Client to draw the line
/// </summary>
/// <param name="drawingContext">drawing context</param>
/// <param name="origin">drawing origin</param>
/// <param name="inversion">indicate the inversion of the drawing surface</param>
public abstract void Draw(
DrawingContext drawingContext,
Point origin,
InvertAxes inversion
);
/// <summary>
/// Draw line
/// </summary>
/// <param name="drawingContext">drawing context</param>
/// <param name="origin">drawing origin</param>
/// <param name="inversion">indicate the inversion of the drawing surface</param>
public override void Draw(
DrawingContext drawingContext,
Point origin,
InvertAxes inversion
)
{
if (drawingContext == null)
{
throw new ArgumentNullException("drawingContext");
}
MatrixTransform antiInversion = TextFormatterImp.CreateAntiInversionTransform(
inversion,
_paragraphWidth,
_height
);
if (antiInversion == null)
{
DrawTextLine(drawingContext, origin);
}
else
{
// Apply anti-inversion transform to correct the visual
drawingContext.PushTransform(antiInversion);
try
{
DrawTextLine(drawingContext, origin);
}
finally
{
drawingContext.Pop();
}
}
}
/// <summary>
/// Create an anti-inversion transform from the inversion flags.
/// The result is used to correct glyph bitmap on an output to
/// a drawing surface with the specified inversions applied on.
/// </summary>
internal static MatrixTransform CreateAntiInversionTransform(
InvertAxes inversion,
double paragraphWidth,
double lineHeight
)
{
if (inversion == InvertAxes.None)
{
// avoid creating unncessary pressure on GC when anti-transform is not needed.
return null;
}
double m11 = 1;
double m22 = 1;
double offsetX = 0;
double offsetY = 0;
if ((inversion & InvertAxes.Horizontal) != 0)
{
m11 = -m11;
offsetX = paragraphWidth;
}
if ((inversion & InvertAxes.Vertical) != 0)
{
m22 = -m22;
offsetY = lineHeight;
}
return new MatrixTransform(m11, 0, 0, m22, offsetX, offsetY);
}
public abstract void Draw(System.Windows.Media.DrawingContext drawingContext, System.Windows.Point origin, InvertAxes inversion);
public abstract void Draw(System.Windows.Media.DrawingContext drawingContext, System.Windows.Point origin, InvertAxes inversion);
public override void Draw(DrawingContext drawingContext, Point origin, InvertAxes inversion) {
foreach (var entry in entries) {
if (entry.Item2 == null)
continue;
if (entry.Item3 == entry.Item1.Length) // All whitespace, no need to render
continue;
var textRun = entry.Item1;
var glyphRun = entry.Item2;
var textProps = textRun.Properties;
var newRun = Clone(glyphRun, new Point {
X = origin.X + glyphRun.BaselineOrigin.X,
Y = (int)(origin.Y + glyphRun.GlyphTypeface.Baseline * textProps.FontRenderingEmSize)
});
if (_textFormattingMode != null)
_textFormattingMode.SetValue(glyphRun, mode);
var box = newRun.ComputeAlignmentBox();
if (textProps.BackgroundBrush != null) {
drawingContext.DrawRectangle(
textProps.BackgroundBrush, null,
new Rect(origin, box.Size));
}
drawingContext.DrawGlyphRun(textProps.ForegroundBrush, newRun);
if (textProps.TextDecorations != null)
foreach (var deco in textProps.TextDecorations) {
var thickness = Math.Round(glyphRun.GlyphTypeface.UnderlineThickness * textProps.FontRenderingEmSize);
var pos = glyphRun.GlyphTypeface.UnderlinePosition -
glyphRun.GlyphTypeface.Baseline +
glyphRun.GlyphTypeface.Height;
pos = Math.Round(pos * textProps.FontRenderingEmSize) + thickness / 2;
var pen = new Pen(textProps.ForegroundBrush, thickness);
drawingContext.DrawLine(pen,
new Point(newRun.BaselineOrigin.X, newRun.BaselineOrigin.Y + pos),
new Point(newRun.BaselineOrigin.X + box.Width, newRun.BaselineOrigin.Y + pos));
}
}
}
