public float LineHeight(float sz)
{
var r = (int)Math.Round(sz);
if (r % 2 != 0)
{
r--; //Every 2 pixel sizes
}
GlyphCollection g;
if (!glyphs.TryGetValue(r, out g))
{
Face.SetCharSize(0, r, 0, 96);
g = new GlyphCollection();
g.Font = this;
g.Size = r;
g.LineHeight = (float)Face.Size.Metrics.Height;
g.Ascender = Face.Size.Metrics.Ascender.ToInt32();
glyphs.Add(r, g);
}
return(g.LineHeight);
}
internal unsafe void AddCharacter(GlyphCollection col, uint cp)
{
if (cp == (uint)'\t')
{
var spaceGlyph = col.GetGlyph((uint)' ');
col.glyphs.Add(cp, new GlyphInfo(spaceGlyph.AdvanceX * 4, spaceGlyph.AdvanceY, spaceGlyph.CharIndex, spaceGlyph.Kerning));
}
Face.SetCharSize(0, col.Size, 0, 96);
var c_face = Face;
bool dobold = emulate_bold;
bool doitalics = emulate_italics;
bool dokern = true;
uint index = c_face.GetCharIndex(cp);
if (index == 0)
{
//Glyph does not exist in font
if (cp == (uint)'?')
{
throw new Exception("Font does not have required ASCII character '?'");
}
var fallback = Platform.GetFallbackFace(ren.FT, cp);
if ((index = fallback.GetCharIndex(cp)) != 0)
{
try
{
c_face = fallback;
c_face.SetCharSize(0, col.Size, 0, 96);
dobold = doitalics = dokern = false;
}
catch (Exception)
{
var qmGlyph = col.GetGlyph((uint)'?');
col.glyphs.Add(cp, qmGlyph);
return;
}
}
else
{
var qmGlyph = col.GetGlyph((uint)'?');
col.glyphs.Add(cp, qmGlyph);
return;
}
}
c_face.LoadGlyph(index, LoadFlags.Default | LoadFlags.ForceAutohint, LoadTarget.Normal);
if (dobold)
{
//Automatically determine a strength
var strength = (c_face.UnitsPerEM * c_face.Size.Metrics.ScaleY.Value) / 0x10000;
strength /= 24;
c_face.Glyph.Outline.Embolden(Fixed26Dot6.FromRawValue(strength));
}
if (doitalics)
{
c_face.Glyph.Outline.Transform(new FTMatrix(0x10000, 0x0366A, 0x00000, 0x10000));
}
c_face.Glyph.RenderGlyph(RenderMode.Normal);
if (c_face.Glyph.Bitmap.Width == 0 || c_face.Glyph.Bitmap.Rows == 0)
{
col.glyphs.Add(cp,
new GlyphInfo(
(int)Math.Ceiling((float)c_face.Glyph.Advance.X),
(int)Math.Ceiling((float)c_face.Glyph.Advance.Y),
index,
dokern && Face.HasKerning
)
);
}
else
{
if (c_face.Glyph.Bitmap.PixelMode != PixelMode.Gray)
{
throw new NotImplementedException();
}
if (currentX + c_face.Glyph.Bitmap.Width > TEXTURE_SIZE)
{
currentX = 0;
currentY += lineMax;
lineMax = 0;
}
if (currentY + c_face.Glyph.Bitmap.Rows > TEXTURE_SIZE)
{
currentX = 0;
currentY = 0;
lineMax = 0;
textures.Add(new Texture2D(
TEXTURE_SIZE,
TEXTURE_SIZE,
false,
SurfaceFormat.R8
));
FLLog.Debug("Text", string.Format("{0}@{1}, New Texture", facename, col.Size));
}
lineMax = (int)Math.Max(lineMax, c_face.Glyph.Bitmap.Rows);
var rect = new Rectangle(
currentX,
currentY,
c_face.Glyph.Bitmap.Width,
c_face.Glyph.Bitmap.Rows
);
var tex = textures [textures.Count - 1];
GL.PixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);
//Set
tex.SetData(0, rect, c_face.Glyph.Bitmap.Buffer);
GL.PixelStorei(GL.GL_UNPACK_ALIGNMENT, 4);
currentX += c_face.Glyph.Bitmap.Width;
col.glyphs.Add(
cp,
new GlyphInfo(
tex,
rect,
(int)Math.Ceiling((float)c_face.Glyph.Advance.X),
(int)Math.Ceiling((float)c_face.Glyph.Advance.Y),
(int)Math.Ceiling((float)c_face.Glyph.Metrics.HorizontalAdvance),
c_face.Glyph.BitmapLeft,
c_face.Glyph.BitmapTop,
index,
dokern && Face.HasKerning
)
);
}
}
