public static string RenderToFile(BaseTextVObject vObject, float dpi)
{
var fileId = CreateFileId(vObject.GetMD5(dpi));
if (Configuration.FileCache.FileExists(fileId))
{
return(fileId);
}
try
{
var bitmap = GetTextBitmap(vObject, dpi, out fileId);
Configuration.FileCache.WriteToStream(fileId, stream =>
{
bitmap.Save(stream, Common.GetWriterSettings(_fileFormat));
bitmap.Dispose();
});
}
catch (Exception)
{
Configuration.FileCache.RemoveFile(fileId);
throw;
}
return(fileId);
}
private static Bitmap GetTextBitmap(BaseTextVObject vObject, float dpi, Point location, bool extendBitmap, out string id)
{
if (vObject == null)
{
throw new ArgumentNullException("vObject");
}
if (dpi <= 0)
{
throw new ArgumentOutOfRangeException("dpi");
}
var rect = vObject.MeasureText(dpi);
var width = (int)System.Math.Ceiling(rect.Width + (extendBitmap ? location.X * 2 : 0));
var height = (int)System.Math.Ceiling(rect.Height + (extendBitmap ? location.Y * 2 : 0));
if (rect.IsEmpty)
{
throw new InvalidOperationException("TextRenderer cannot write a text bitmap because it is empty");
}
var scale = dpi / vObject.TargetDpi ?? 1;
var colorManagement = vObject.GetColorManagement(true);
var textBitmap = new Bitmap(width, height, ColorManagement.GetPixelFormat(_colorSpace), RgbColor.Transparent)
{
DpiX = dpi / scale,
DpiY = dpi / scale,
ColorProfile = ColorManagement.GetProfile(colorManagement, _colorSpace, true)
};
using (var graphics = textBitmap.GetAdvancedGraphics())
{
graphics.Transform.Translate(-rect.X + location.X, -rect.Y + location.Y);
if (!Utils.EqualsOfFloatNumbers(scale, 1))
{
graphics.Transform.Scale(scale, scale);
}
var angle = vObject.Angle;
var opacity = vObject.Opacity;
var curvedText = vObject as CurvedTextVObject;
if (curvedText != null)
{
curvedText.TextPath.RotateAt(-angle, curvedText.TextPath.GetFirstPoint());
}
vObject.Transform.Update(null, null, null, null, 0);
vObject.Opacity = 1;
vObject.DrawText(graphics, textBitmap, colorManagement);
if (curvedText != null)
{
curvedText.TextPath.RotateAt(angle, curvedText.TextPath.GetFirstPoint());
}
vObject.Transform.Update(null, null, null, null, angle);
vObject.Opacity = opacity;
}
textBitmap.DpiX = dpi;
textBitmap.DpiY = dpi;
id = CreateFileId(vObject.GetMD5(dpi));
return(textBitmap);
}