public byte[] BuildImageRgba(IRichTextBox textBox)
{
var text = textBox.Text;
var layout = textBox.Layout;
var bitmap = new Bitmap(textBox.Size.Width, textBox.Size.Height, PixelFormat.Format32bppRgba);
var graphics = new Graphics(bitmap);
var backgroundColor = text.Style.BackgroundColor;
graphics.Clear(new Color(backgroundColor.R, backgroundColor.G, backgroundColor.B, backgroundColor.A));
foreach (var lspan in layout.LayoutSpans.Concat(layout.ExternalLayoutSpans))
{
if (lspan.EmbeddingImage != null)
{
var etoImage = lspan.EmbeddingImage.ToEto();
graphics.DrawImage(etoImage, lspan.Bounds.MinX, lspan.Bounds.MinY);
}
else
{
var style = lspan.Style;
var rectText = lspan.Text;
var etoFontFamily = fontFamilyCache.GetFontFamily(style.FontFamily);
var etoFont = new Font(etoFontFamily, style.Size, ConvertFontStyle(style.FontDecoration), ConvertFontDecoration(style.FontDecoration));
var etoColor = new Color(style.TextColor.R, style.TextColor.G, style.TextColor.B, style.TextColor.A);
graphics.DrawText(etoFont, etoColor, lspan.Bounds.MinX, lspan.Bounds.MinY, rectText);
}
}
graphics.Flush();
return(FromEtoImage.GetRawData(bitmap));
}
public Size2 MeasureString(string str, IRtSpanStyle style)
{
var etoFontFamily = fontFamilyCache.GetFontFamily(style.FontFamily);
Converters.ToEto(style.FontDecoration, out var etoStyle, out var etoDecoration);
var etoFont = new Font(etoFontFamily, style.Size, etoStyle, etoDecoration);
return(Converters.ToClarity(graphics.MeasureString(etoFont, str)));
}