private static void AddPadding(RenderGlyph renderGlyph, int padding)
{
if (padding == 0)
{
return;
}
int width = Math.Max(0, renderGlyph.Bitmap.Width + padding * 2);
int height = Math.Max(0, renderGlyph.Bitmap.Height + padding * 2);
BBitmap result = new BBitmap(width, height);
result.Draw(renderGlyph.Bitmap, padding, padding);
renderGlyph.Info.XOffset += padding;
renderGlyph.Info.YOffset = height;
renderGlyph.Bitmap = result;
}
private static BFont FromFace(Face face, BFontOptions options, Action <RenderGlyph> action = null)
{
char[] singleCharacters = options.Characters.GroupBy(c => c).Select(g => g.First()).Where(c => !char.IsControl(c)).ToArray();
List <RenderGlyph> renderGlyphs = new List <RenderGlyph>();
face.SetCharSize(0, options.Size, 72, 72);
foreach (var character in singleCharacters)
{
face.LoadGlyph(face.GetCharIndex(character), LoadFlags.Default, options.DistanceField > 0 ? LoadTarget.Mono : LoadTarget.Normal);
face.Glyph.RenderGlyph(options.DistanceField > 0 ? RenderMode.Mono : RenderMode.Normal);
BBitmap glyphBitmap = face.Glyph.Metrics.Height != 0 ? BBitmap.FromFTBitmap(face.Glyph.Bitmap) : new BBitmap((int)face.Glyph.Advance.X, 0);
renderGlyphs.Add(new RenderGlyph
{
Bitmap = glyphBitmap,
Info = new BGlyph
{
Character = character,
XOffset = face.Glyph.BitmapLeft,
YOffset = face.Glyph.BitmapTop,
Width = (int)face.Glyph.Metrics.Width,
Height = (int)face.Glyph.Metrics.Height,
XAdvance = (int)face.Glyph.Advance.X,
YAdvance = (int)face.Glyph.Advance.Y
}
});
}
renderGlyphs = renderGlyphs.OrderByDescending(g => g.Info.Height)
.ThenBy(g => g.Info.Character).ToList();
List <BBitmap> pages = new List <BBitmap>();
List <BGlyph> glyphs = new List <BGlyph>();
Point cursor = new Point(0, 0);
int maxHeight = 0;
BBitmap page;
void CreateNewPage()
{
page = new BBitmap(options.PageSize, options.PageSize);
pages.Add(page);
}
CreateNewPage();
foreach (var renderGlyph in renderGlyphs)
{
action?.Invoke(renderGlyph);
if (cursor.X + renderGlyph.Bitmap.Width > options.PageSize)
{
cursor.X = 0;
cursor.Y += maxHeight;
maxHeight = 0;
if (cursor.Y + renderGlyph.Bitmap.Height > options.PageSize)
{
cursor.Y = 0;
CreateNewPage();
}
}
renderGlyph.Info.Page = pages.Count - 1;
renderGlyph.Info.X = cursor.X;
renderGlyph.Info.Y = cursor.Y;
glyphs.Add(renderGlyph.Info);
page.Draw(renderGlyph.Bitmap, cursor.X, cursor.Y);
maxHeight = Math.Max(maxHeight, renderGlyph.Bitmap.Height);
cursor.X += renderGlyph.Bitmap.Width;
}
return(new BFont
{
Glyphs = glyphs.ToArray(),
LineHeight = face.Height,
Pages = pages.ToArray(),
Name = face.FamilyName
});
}