在DrawingImage中绘制格式的文本 [英] Draw formatted text within a DrawingImage

问题描述

我正在尝试在XAML中将某些格式的文本作为图形的一部分。这可能吗？

I'm trying to include some formatted text as part of a drawing in XAML. Is this possible? How is it done?

示例：

<DrawingImage>
    <DrawingImage.Drawing>
      <!-- Can text be drawn here? -->
    </DrawingImage.Drawing>
</DrawingImage>

推荐答案

是。使用 GlyphRunDrawing 作为DrawingGroup的一部分，或者作为绘图本身，这就是您的DrawingImage的来源。可以在Xaml中以及后面的代码中构造GlyphRun：

Yes. Use a GlyphRunDrawing as part of the DrawingGroup or as the Drawing itself, that is the source of your DrawingImage. To construct the GlyphRun in Xaml is possible, and also in code behind:

Typeface typeface = new Typeface(FontFamily, FontStyle, FontWeight, FontStretches.Normal);
if (!typeface.TryGetGlyphTypeface(out _glyphTypeface))
    return;

_glyphIndexes = new ushort[text.Length];
_advanceWidths = new double[text.Length];

double textWidth = 0;
for (int ix = 0; ix < text.Length; ix++)
{
    ushort glyphIndex = _glyphTypeface.CharacterToGlyphMap[text[ix]];
    _glyphIndexes[ix] = glyphIndex;

    double width = _glyphTypeface.AdvanceWidths[glyphIndex] * FontSize;
   _advanceWidths[ix] = width;

   textWidth += width;
   double textHeight = _glyphTypeface.Height * FontSize;
}

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