// Colors: Red,Blue,Purple,#006666
private static IImageProcessingContext DrawWatermark(this IImageProcessingContext context, WatermarkSettings settings)
{
var imgSize = context.GetCurrentSize();
// measure the text size
var size = TextMeasurer.Measure(settings.Text, new RendererOptions(settings.TextFont));
//find out how much we need to scale the text to fill the space (up or down)
var scalingFactor = Math.Min(imgSize.Width / size.Width, imgSize.Height / size.Height) / 3;
//create a new settings.TextFont
var scaledFont = new Font(settings.TextFont, scalingFactor * settings.TextFont.Size);
var center = settings.Position switch
{
WatermarkPosition.Top => new PointF(imgSize.Width / 2, (imgSize.Height / 9)),
WatermarkPosition.TopLeft => new PointF(imgSize.Width / 2, (imgSize.Height / 9)),
WatermarkPosition.TopRight => new PointF(imgSize.Width / 2, (imgSize.Height / 9)),
_ => new PointF(imgSize.Width / 2, imgSize.Height - (imgSize.Height / 9)),
};
var textGraphicOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
};
// Apply Banner
context.DrawBanner(settings)
.DrawText(textGraphicOptions, settings.Text, scaledFont, settings.TextColor, center);
return(context);
}