public static void SaveImage(this IPathCollection shape, params string[] path)
{
shape = shape.Translate(-shape.Bounds.Location) // touch top left
.Translate(new Vector2(10)); // move in from top left
var fullPath = System.IO.Path.GetFullPath(System.IO.Path.Combine("Output", System.IO.Path.Combine(path)));
// pad even amount around shape
int width = (int)(shape.Bounds.Left + shape.Bounds.Right);
int height = (int)(shape.Bounds.Top + shape.Bounds.Bottom);
using (var img = new Image <Rgba32>(width, height))
{
img.Fill(Rgba32.DarkBlue);
foreach (var s in shape)
{
// In ImageSharp.Drawing.Paths there is an extension method that takes in an IShape directly.
img.Fill(Rgba32.HotPink, s, new ImageSharp.GraphicsOptions(true));
}
// img.Draw(Color.LawnGreen, 1, new ShapePath(shape));
// Ensure directory exists
Directory.CreateDirectory(System.IO.Path.GetDirectoryName(fullPath));
img.Save(fullPath);
}
}
public void DrawGlyphToImage(int charCode, System.Drawing.Point location, Image <Rgba32> image)
{
int charIndex = charCode - FirstChar;
IPathCollection paths = glyphPaths[charIndex];
paths = paths.Translate(location.X - renderOffsets[charIndex].X, location.Y - renderOffsets[charIndex].Y);
DrawColoredPaths(image, paths, pathColors?[charIndex]);
}
private static IPathCollection GetGlyphs(string text, Size targetSize, FontFamily fontFamily)
{
Font font = new Font(fontFamily, 100); // size doesn't matter too much as we will be scaling shortly anyway
RendererOptions style = new RendererOptions(font, 72); // again dpi doesn't overlay matter as this code genreates a vector
style.Origin = new System.Numerics.Vector2(targetSize.Width / 2, 0);
// this is the important line, where we render the glyphs to a vector instead of directly to the image
// this allows further vector manipulation (scaling, translating) etc without the expensive pixel operations.
IPathCollection glyphs = TextBuilder.GenerateGlyphs(text, style);
var widthScale = (targetSize.Width / glyphs.Bounds.Width);
var heightScale = (targetSize.Height / glyphs.Bounds.Height);
var minScale = Math.Min(widthScale, heightScale);
// scale so that it will fit exactly in image shape once rendered
glyphs = glyphs.Scale(minScale);
// move the vectorised glyph so that it touchs top and left edges
// could be tweeked to center horizontaly & vertically here
glyphs = glyphs.Translate(-glyphs.Bounds.Location);
//glyphs = glyphs.Translate(0, targetSize.Height * 3);
return(glyphs);
}
/// <summary>
/// Creates a path translated by the supplied postion
/// </summary>
/// <param name="path">The path to translate.</param>
/// <param name="x">The amount to translate along the X axis.</param>
/// <param name="y">The amount to translate along the Y axis.</param>
/// <returns>A <see cref="IPath"/> with a translate transform applied.</returns>
public static IPathCollection Translate(this IPathCollection path, float x, float y)
{
return(path.Translate(new PointF(x, y)));
}