static Bitmap GenerateOutput(string fontFileName, string phrase, int pixels, int SDF_scale)
{
var bytes = File.ReadAllBytes(fontFileName);
var font = new LunarLabs.Fonts.Font(bytes);
int height = pixels * SDF_scale;
var scale = font.ScaleInPixels(height);
var glyphs = new Dictionary <char, FontGlyph>();
var bitmaps = new Dictionary <char, Bitmap>();
foreach (var ch in phrase)
{
if (glyphs.ContainsKey(ch))
{
continue;
}
var glyph = font.RenderGlyph(ch, scale);
glyphs[ch] = glyph;
bitmaps[ch] = ConvertToBitmap(glyph.Image);
}
int ascent, descent, lineGap;
font.GetFontVMetrics(out ascent, out descent, out lineGap);
int baseLine = height - (int)(ascent * scale);
int minX = int.MaxValue;
int maxX = int.MinValue;
int minY = int.MaxValue;
int maxY = int.MinValue;
var positions = new Point[phrase.Length];
int x = 0;
for (int i = 0; i < phrase.Length; i++)
{
var ch = phrase[i];
var glyph = glyphs[ch];
var next = i < phrase.Length - 1 ? phrase[i + 1] : '\0';
var kerning = font.GetKerning(ch, next, scale);
int y0 = height - baseLine + glyph.yOfs;
int y1 = y0 + glyph.Image.Height;
int x0 = x + glyph.xOfs - kerning;
int x1 = x0 + glyph.Image.Width;
x += glyph.xAdvance;
positions[i] = new Point(x0, y0);
x1 = Math.Max(x, x1);
minX = Math.Min(minX, x0);
maxX = Math.Max(maxX, x1);
minY = Math.Min(minY, y0);
maxY = Math.Max(maxY, y1);
}
int realWidth = (maxX - minX) + 1;
int realHeight = (maxY - minY) + 1;
for (int i = 0; i < phrase.Length; i++)
{
positions[i].X -= minX;
positions[i].Y -= minY;
}
var tempBmp = new GlyphBitmap(realWidth, realHeight);
{
// draw the baseline height in blue color
var ly = height - (baseLine + minY);
//g.DrawLine(new Pen(Color.Blue), 0, ly, realWidth - 1, ly);
// now draw each character
x = 0;
for (int i = 0; i < phrase.Length; i++)
{
var ch = phrase[i];
var glyph = glyphs[ch];
var bmp = bitmaps[ch];
var pos = positions[i];
tempBmp.Draw(glyph.Image, pos.X, pos.Y);
}
}
if (SDF_scale > 1)
{
tempBmp = DistanceFieldUtils.CreateDistanceField(tempBmp, SDF_scale, 16 * SDF_scale);
}
return(ConvertToBitmap(tempBmp));
}
static void Main(string[] args)
{
var dlg = new OpenFileDialog {
Filter = "Font Files (*.ttf)|*.ttf", InitialDirectory = Directory.GetCurrentDirectory()
};
if (dlg.ShowDialog() != DialogResult.OK)
{
return;
}
var fontFileName = dlg.FileName;
Console.WriteLine($"Loading {fontFileName}...");
var bytes = File.ReadAllBytes(fontFileName);
var font = new LunarLabs.Fonts.Font(bytes);
// make this a number larger than 1 to enable SDF output
int SDF_scale = 1;
// here is the desired height in pixels of the output
// the real value might not be exactly this depending on which characters are part of the input text
int height = 64 * SDF_scale;
var scale = font.ScaleInPixels(height);
var phrase = "Hello world";
var glyphs = new Dictionary <char, FontGlyph>();
var bitmaps = new Dictionary <char, Bitmap>();
foreach (var ch in phrase)
{
if (glyphs.ContainsKey(ch))
{
continue;
}
var glyph = font.RenderGlyph(ch, scale);
glyphs[ch] = glyph;
bitmaps[ch] = ConvertToBitmap(glyph.Image);
}
int ascent, descent, lineGap;
font.GetFontVMetrics(out ascent, out descent, out lineGap);
int baseLine = height - (int)(ascent * scale);
int minX = int.MaxValue;
int maxX = int.MinValue;
int minY = int.MaxValue;
int maxY = int.MinValue;
var positions = new Point[phrase.Length];
int x = 0;
for (int i = 0; i < phrase.Length; i++)
{
var ch = phrase[i];
var glyph = glyphs[ch];
var next = i < phrase.Length - 1 ? phrase[i + 1] : '\0';
var kerning = font.GetKerning(ch, next, scale);
int y0 = height - baseLine + glyph.yOfs;
int y1 = y0 + glyph.Image.Height;
int x0 = x + glyph.xOfs - kerning;
int x1 = x0 + glyph.Image.Width;
x += glyph.xAdvance;
positions[i] = new Point(x0, y0);
x1 = Math.Max(x, x1);
minX = Math.Min(minX, x0);
maxX = Math.Max(maxX, x1);
minY = Math.Min(minY, y0);
maxY = Math.Max(maxY, y1);
}
int realWidth = (maxX - minX) + 1;
int realHeight = (maxY - minY) + 1;
for (int i = 0; i < phrase.Length; i++)
{
positions[i].X -= minX;
positions[i].Y -= minY;
}
var tempBmp = new GlyphBitmap(realWidth, realHeight);
{
// draw the baseline height in blue color
var ly = height - (baseLine + minY);
//g.DrawLine(new Pen(Color.Blue), 0, ly, realWidth - 1, ly);
// now draw each character
x = 0;
for (int i = 0; i < phrase.Length; i++)
{
var ch = phrase[i];
var glyph = glyphs[ch];
var bmp = bitmaps[ch];
var pos = positions[i];
tempBmp.Draw(glyph.Image, pos.X, pos.Y);
}
}
if (SDF_scale > 1)
{
tempBmp = DistanceFieldUtils.CreateDistanceField(tempBmp, SDF_scale, 32);
}
var outBmp = ConvertToBitmap(tempBmp);
var outputFileName = "output.png";
Console.WriteLine($"Outputting {outputFileName}...");
outBmp.Save(outputFileName);
}
