static PointF Offset(PointF point, SizeF direction, float distance)
{
return(new PointF()
{
X = point.X + direction.Width * distance,
Y = point.Y + direction.Height * distance,
});
}
static SizeF Flip(SizeF point)
{
return(new SizeF()
{
Width = -point.Height,
Height = point.Width
});
}
public SizeF MeasureString(String text, Font font, int width, StringFormat format)
{
SixLabors.Fonts.FontFamily family = SixLabors.Fonts.SystemFonts.Find(font.Name);
//font.Bold
//font.Italic
//font.Underline
//font.Strikeout
SixLabors.Fonts.Font fo = new SixLabors.Fonts.Font(family, font.Size);
SixLabors.Fonts.RendererOptions ro = new SixLabors.Fonts.RendererOptions(fo);
SixLabors.Primitives.SizeF result = SixLabors.Fonts.TextMeasurer.Measure(text, ro);
return(new System.Drawing.SizeF(result.Width, result.Height));
}
} // End Function Crop
public override System.IO.Stream ResizeImage(
System.IO.Stream inputStream,
System.IO.Stream outputStream,
SaveFormat saveFormat,
float ratio,
System.Drawing.Size?maxSize)
{
SixLabors.ImageSharp.Image <SixLabors.ImageSharp.Rgba32> img =
SixLabors.ImageSharp.Image.Load(inputStream);
SixLabors.Primitives.SizeF oldSizeSize = img.Size();
if (maxSize.HasValue)
{
float ratioX = (float)maxSize.Value.Width / (float)img.Width;
float ratioY = (float)maxSize.Value.Height / (float)img.Width;
ratio = ratioX < ratioY ? ratioX : ratioY;
} // End if (maxSize.HasValue)
SixLabors.Primitives.SizeF newSize = oldSizeSize * ratio;
if (outputStream == null)
{
outputStream = new System.IO.MemoryStream();
}
// Compand: whether to compress or expand individual pixel color values
img.Mutate(x => x.Resize((SixLabors.Primitives.Size)newSize, KnownResamplers.Bicubic, false));
img.Save(outputStream, GetEncoder(saveFormat));
// NO, no seek, if we're respone.OutputStream
if (outputStream.CanSeek)
{
outputStream.Seek(0, System.IO.SeekOrigin.Begin);
}
return(outputStream);
} // End Function ResizeImage
