// Rasterizes a single character glyph.
static Glyph ImportGlyph(char character, Face face, Brush brush, StringFormat stringFormat, Bitmap bitmap, System.Drawing.Graphics graphics)
{
string characterString = character.ToString();
uint glyphIndex = face.GetCharIndex(character);
face.LoadGlyph(glyphIndex, LoadFlags.Default, LoadTarget.Normal);
face.Glyph.RenderGlyph(RenderMode.Normal);
// Measure the size of this character.
var width = (int)face.Glyph.Advance.X >> 6;
var height = (int)face.Glyph.Metrics.Height >> 6;
SizeF size = new SizeF(width, height);
int characterWidth = (int)Math.Ceiling(size.Width);
int characterHeight = (int)Math.Ceiling(size.Height);
// Pad to make sure we capture any overhangs (negative ABC spacing, etc.)
int padWidth = characterWidth;
int padHeight = characterHeight / 2;
int bitmapWidth = characterWidth + padWidth * 2;
int bitmapHeight = characterHeight + padHeight * 2;
if (bitmapWidth > MaxGlyphSize || bitmapHeight > MaxGlyphSize)
{
throw new Exception("Excessively large glyph won't fit in my lazily implemented fixed size temp surface.");
}
// Render the character.
graphics.Clear(System.Drawing.Color.Black);
if (face.Glyph.Bitmap.Width > 0 && face.Glyph.Bitmap.Rows > 0)
{
BitmapData data = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, face.Glyph.Bitmap.Width, face.Glyph.Bitmap.Rows),
ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
byte[] gpixelAlphas = new byte[face.Glyph.Bitmap.Width * face.Glyph.Bitmap.Rows];
Marshal.Copy(face.Glyph.Bitmap.Buffer, gpixelAlphas, 0, gpixelAlphas.Length);
for (int j = 0; j < gpixelAlphas.Length; j++)
{
int pixelOffset = (j / data.Width) * data.Stride + (j % data.Width * 4);
Marshal.WriteByte(data.Scan0, pixelOffset + 3, gpixelAlphas [j]);
}
bitmap.UnlockBits(data);
}
// Clone the newly rendered image.
Bitmap glyphBitmap = null;
if (face.Glyph.Bitmap.Width > 0 || face.Glyph.Bitmap.Rows > 0)
{
glyphBitmap = bitmap.Clone(new System.Drawing.Rectangle(0, 0, face.Glyph.Bitmap.Width, face.Glyph.Bitmap.Rows), PixelFormat.Format32bppArgb);
}
else
{
var gHA = face.Glyph.Metrics.HorizontalAdvance >> 6;
var gVA = face.Glyph.Metrics.VerticalAdvance >> 6;
gHA = gHA > 0 ? gHA : gVA;
gVA = gVA > 0 ? gVA : gHA;
glyphBitmap = new Bitmap(gHA, gVA);
}
BitmapUtils.ConvertToGrey(glyphBitmap);
// not sure about this at all
var abc = new ABCFloat();
abc.A = face.Glyph.Metrics.HorizontalBearingX >> 6;
abc.B = face.Glyph.Metrics.Width >> 6;
abc.C = (face.Glyph.Metrics.HorizontalAdvance >> 6) - (abc.A + abc.B);
// Query its ABC spacing.
//float? abc = GetCharacterWidth(character, font, graphics);
// if (glyphBitmap == null)
// Console.WriteLine("null");
// Construct the output Glyph object.
return(new Glyph(character, glyphBitmap)
{
XOffset = -padWidth,
XAdvance = face.Glyph.Metrics.HorizontalAdvance >> 6,
YOffset = -(face.Glyph.Metrics.HorizontalBearingY >> 6),
CharacterWidths = abc
});
}
// Rasterizes a single character glyph.
static Glyph ImportGlyph(char character, Face face, Brush brush, StringFormat stringFormat, Bitmap bitmap, System.Drawing.Graphics graphics)
{
uint glyphIndex = face.GetCharIndex(character);
face.LoadGlyph(glyphIndex, LoadFlags.Default, LoadTarget.Normal);
face.Glyph.RenderGlyph(RenderMode.Normal);
// Render the character.
graphics.Clear(System.Drawing.Color.Black);
if (face.Glyph.Bitmap.Width > 0 && face.Glyph.Bitmap.Rows > 0)
{
BitmapData data = bitmap.LockBits(new System.Drawing.Rectangle(0, 0, face.Glyph.Bitmap.Width, face.Glyph.Bitmap.Rows),
ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
byte[] gpixelAlphas = new byte[face.Glyph.Bitmap.Width * face.Glyph.Bitmap.Rows];
Marshal.Copy(face.Glyph.Bitmap.Buffer, gpixelAlphas, 0, gpixelAlphas.Length);
for (int j = 0; j < gpixelAlphas.Length; j++)
{
int pixelOffset = (j / data.Width) * data.Stride + (j % data.Width * 4);
Marshal.WriteByte(data.Scan0, pixelOffset + 3, gpixelAlphas [j]);
}
bitmap.UnlockBits(data);
}
// Clone the newly rendered image.
Bitmap glyphBitmap = null;
if (face.Glyph.Bitmap.Width > 0 || face.Glyph.Bitmap.Rows > 0)
{
glyphBitmap = bitmap.Clone(new System.Drawing.Rectangle(0, 0, face.Glyph.Bitmap.Width, face.Glyph.Bitmap.Rows), PixelFormat.Format32bppArgb);
}
else
{
var gHA = face.Glyph.Metrics.HorizontalAdvance >> 6;
var gVA = face.Size.Metrics.Height >> 6;
gHA = gHA > 0 ? gHA : gVA;
gVA = gVA > 0 ? gVA : gHA;
glyphBitmap = new Bitmap(gHA, gVA);
}
BitmapUtils.ConvertAlphaToGrey(glyphBitmap);
// not sure about this at all
var abc = new ABCFloat();
abc.A = face.Glyph.Metrics.HorizontalBearingX >> 6;
abc.B = face.Glyph.Metrics.Width >> 6;
abc.C = (face.Glyph.Metrics.HorizontalAdvance >> 6) - (abc.A + abc.B);
// Construct the output Glyph object.
return(new Glyph(character, glyphBitmap)
{
XOffset = -(face.Glyph.Advance.X >> 6),
XAdvance = face.Glyph.Metrics.HorizontalAdvance >> 6,
YOffset = -(face.Glyph.Metrics.HorizontalBearingY >> 6),
CharacterWidths = abc
});
}