in processing-pipelines/image-v2/watermarker/csharp/Function.cs [90:119]
private static IImageProcessingContext ApplyScalingWaterMarkSimple(IImageProcessingContext processingContext,
Font font,
string text,
Color color,
float padding)
{
Size imgSize = processingContext.GetCurrentSize();
float targetWidth = imgSize.Width - (padding * 2);
float targetHeight = imgSize.Height - (padding * 2);
// measure the text size
FontRectangle size = TextMeasurer.Measure(text, new RendererOptions(font));
//find out how much we need to scale the text to fill the space (up or down)
float scalingFactor = Math.Min(imgSize.Width / size.Width, imgSize.Height / size.Height);
//create a new font
Font scaledFont = new Font(font, scalingFactor * font.Size);
var center = new PointF(imgSize.Width / 2, imgSize.Height / 2);
var textGraphicOptions = new TextGraphicsOptions()
{
TextOptions = {
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center
}
};
return processingContext.DrawText(textGraphicOptions, text, scaledFont, color, center);
}