Spire.Presentation 8.10.2 では形状内のテキストの位置情報を取得する機能が追加されました

Presentation ppt = new Presentation();
 ppt.LoadFromFile(inputFile);
 StringBuilder sb = new StringBuilder();
 ISlide slide = ppt.Slides[0];
 for (int i = 0; i < slide.Shapes.Count; i++)
 {
     IShape shape = slide.Shapes[i];
     if (shape is IAutoShape)
     {
         IAutoShape autoshape = slide.Shapes[i] as IAutoShape;
         string text = autoshape.TextFrame.Text;
         //obtain the text position information
         PointF point = autoshape.TextFrame.GetTextLocation();
         sb.AppendLine("Shape " + i + "：" + text + "\r\n" + "location：" + point.ToString());
     }
 }
 File.AppendAllText(outputFile, sb.ToString());
 ppt.Dispose();

Presentation ppt = new Presentation();
ppt.LoadFromFile(inputFile);
ISlide slide = ppt.Slides[0];
IAutoShape autoshape = slide.Shapes[0] as IAutoShape;
IList lines = autoshape.TextFrame.GetLayoutLines();
for (int i = 0; i < lines.Count; i++)
{
   float ascent= lines[i].Ascent;
   float descent = lines[i].Descent;
}

Presentation ppt = new Presentation();
ppt.LoadFromFile("FreeForm.pptx");
ISlide slide = ppt.Slides[0];
int num = 0;
foreach (IShape shape in slide.Shapes)
{
    byte[] svgByte = shape.SaveAsSvg();
    FileStream fs = new FileStream("shape_" + num + ".svg",FileMode.Create);
    fs.Write(svgByte, 0, svgByte.Length);
    fs.Close();
    num++;
}