/// <summary>
/// Retrieve the list of faces from the specified font. For example: regular, bold, italic.
/// </summary>
static public string[] GetFaces(Font font)
{
if (font == null || !isPresent)
{
return(null);
}
string[] names = null;
IntPtr lib = IntPtr.Zero;
IntPtr face = IntPtr.Zero;
if (FT_Init_FreeType(out lib) != 0)
{
Debug.LogError("Failed to initialize FreeType");
return(null);
}
string fileName = Application.dataPath.Substring(0, Application.dataPath.Length - "Assets".Length) +
UnityEditor.AssetDatabase.GetAssetPath(font);
if (File.Exists(fileName))
{
if (FT_New_Face(lib, fileName, 0, out face) != 0)
{
Debug.LogError("Unable to use the chosen font (FT_New_Face).");
}
else
{
FT_FaceRec record = (FT_FaceRec)Marshal.PtrToStructure(face, typeof(FT_FaceRec));
names = new string[record.num_faces];
for (int i = 0; i < record.num_faces; i++)
{
IntPtr ptr = IntPtr.Zero;
if (FT_New_Face(lib, fileName, i, out ptr) == 0)
{
string family = Marshal.PtrToStringAnsi(record.family_name);
string style = Marshal.PtrToStringAnsi(record.style_name);
names[i] = family + " - " + style;
FT_Done_Face(ptr);
}
}
}
}
if (face != IntPtr.Zero)
{
FT_Done_Face(face);
}
#if !UNITY_3_5
if (lib != IntPtr.Zero)
{
FT_Done_FreeType(lib);
}
#endif
return(names);
}
public override int GetCharWidth(PDFFont pdfFont, TTFontData data,
char charCode)
{
InitLibrary();
int aint = (int)charCode;
if (data.Widths.IndexOfKey(charCode) >= 0)
{
return(data.Widths[charCode]);
}
LogFontFt cfont = data.LogFont;
cfont.OpenFont();
int awidth = 0;
Monitor.Enter(flag);
try
{
if (data.Widths.IndexOfKey(charCode) >= 0)
{
awidth = data.Widths[charCode];
}
else
{
if (0 == FT.FT_Load_Char(cfont.iface, (uint)charCode, (int)FT.FT_LOAD_NO_SCALE))
{
FT_FaceRec aface = (FT_FaceRec)Marshal.PtrToStructure(cfont.iface, typeof(FT_FaceRec));
FT_GlyphSlotRec aglyph = (FT_GlyphSlotRec)Marshal.PtrToStructure(aface.glyph, typeof(FT_GlyphSlotRec));
ushort width1 = (ushort)(aglyph.linearHoriAdvance >> 16);
ushort width2 = (ushort)(aglyph.linearHoriAdvance & 0x0000FFFF);
double dwidth = width1 + width2 / (double)65535;
awidth = System.Convert.ToInt32(Math.Round(cfont.widthmult * dwidth));
}
data.Widths[charCode] = awidth;
data.Glyphs[charCode] = System.Convert.ToInt32(FT.FT_Get_Char_Index(cfont.iface, charCode));
if (data.FirstLoaded > aint)
{
data.FirstLoaded = aint;
}
if (data.LastLoaded < aint)
{
data.LastLoaded = aint;
}
}
}
finally
{
Monitor.Exit(flag);
}
return(awidth);
}
/// <summary>
/// Creates a new font set.
/// </summary>
/// <param name="family">The font family.</param>
/// <param name="size">Size in pixels.</param>
/// <param name="resolution">Resolution in dpi.</param>
public FontAssetCore(FontFamily family, int size, uint resolution)
{
_family = family;
_resolution = resolution;
FT_FaceRec face = (FT_FaceRec)Marshal.PtrToStructure(_family.Face, typeof(FT_FaceRec));
_charSet = new BitmapCharacterSet(face.num_glyphs)
{
RenderedSize = size,
Width = MAX_WIDTH,
Height = MAX_HEIGHT
};
_charSet.Ascender = _charSet.RenderedSize * face.ascender / face.height;
}
/// <summary>
/// Render the font to a series of OpenGL textures (one per letter)
/// </summary>
/// <param name="fontsize">size of the font</param>
/// <param name="DPI">dots-per-inch setting</param>
public void ftRenderToTexture(int fontsize, uint DPI)
{
font_size = fontsize;
face = (FT_FaceRec)Marshal.PtrToStructure(faceptr, typeof(FT_FaceRec));
Console.WriteLine("Num Faces:" + face.num_faces.ToString());
Console.WriteLine("Num Glyphs:" + face.num_glyphs.ToString());
Console.WriteLine("Num Char Maps:" + face.num_charmaps.ToString());
Console.WriteLine("Font Family:" + face.family_name);
Console.WriteLine("Style Name:" + face.style_name);
Console.WriteLine("Generic:" + face.generic);
Console.WriteLine("Bbox:" + face.bbox);
Console.WriteLine("Glyph:" + face.glyph);
// IConsole.Write("Num Glyphs:", );
//Freetype measures the font size in 1/64th of pixels for accuracy
//so we need to request characters in size*64
FT.FT_Set_Char_Size(faceptr, font_size << 6, font_size << 6, DPI, DPI);
//Provide a reasonably accurate estimate for expected pixel sizes
//when we later on create the bitmaps for the font
FT.FT_Set_Pixel_Sizes(faceptr, (uint)font_size, (uint)font_size);
// Once we have the face loaded and sized we generate opengl textures
// from the glyphs for each printable character
Console.WriteLine("Compiling Font Characters 0..127");
textures = new int[128];
extent_x = new int[128];
offsets = new FTGlyphOffset[128];
list_base = Gl.glGenLists(128);
Gl.glGenTextures(128, textures);
for (int c = 0; c < 128; c++)
{
CompileCharacterToTexture(face, c);
if (c < 127)
{
sChars += ",";
}
}
//Console.WriteLine("Font Compiled:" + sChars);
}
public void OpenFont()
{
if (faceinit)
{
return;
}
Monitor.Enter(FontInfoFt.flag);
try
{
if (FontFaces.IndexOfKey(keyname) >= 0)
{
iface = FontFaces[keyname];
faceinit = true;
}
else
{
FontInfoFt.CheckFreeType(FT.FT_New_Face(ftlibrary, filename, 0, out iface));
FT_FaceRec aface = new FT_FaceRec();
FontInfoFt.CheckFreeType(FT.FT_New_Face(ftlibrary, filename, 0, out iface));
aface = (FT_FaceRec)Marshal.PtrToStructure(iface, typeof(FT_FaceRec));
faceinit = true;
if (type1)
{
kerningfile = System.IO.Path.ChangeExtension(filename, ".afm");
if (File.Exists(kerningfile))
{
FontInfoFt.CheckFreeType(FT.FT_Attach_File(iface, kerningfile));
}
}
// Don't need scale, but this is a scale that returns
// exact widht for pdf if you divide the result
// of Get_Char_Width by 64
FontInfoFt.CheckFreeType(FT.FT_Set_Char_Size(iface, 0, 64 * 100, 720, 720));
FontFaces.Add(keyname, iface);
}
}
finally
{
Monitor.Exit(FontInfoFt.flag);
}
}
public Font(string font, uint size)
{
if (!File.Exists(font))
{
throw new FileNotFoundException("Failed to load font file:" + font);
}
Size = size;
if (Graphics.Instance.GraphicsDevice == null)
{
throw new NullReferenceException("Graphics Device is null.");
}
gd = Graphics.Instance.GraphicsDevice;
IntPtr libptr;
int ret = FT.FT_Init_FreeType(out libptr);
if (ret != 0)
{
throw new Exception("Failed to load FreeType library.");
}
int retb = FT.FT_New_Face(libptr, font, 0, out faceptr);
if (retb != 0)
{
throw new Exception("Failed to create font face.");
}
face = (FT_FaceRec)Marshal.PtrToStructure(faceptr, typeof(FT_FaceRec));
FT.FT_Set_Char_Size(faceptr, (int)size << 6, (int)size << 6, 96, 96);
FT.FT_Set_Pixel_Sizes(faceptr, size, size);
ascender = face.ascender >> 6;
descender = face.descender >> 6;
fontheight = ((face.height >> 6) + descender + ascender) / 4;
yoffset = (int)(Size - ascender);
baseCharacter = CreateChar('i');
}
private bool AddGlyphInternal(uint glyphIndex)
{
// FreeType measures font size in terms Of 1/64ths of a point.
// 1 point = 1/72th of an inch. Resolution is in dots (pixels) per inch.
// Locking is also required here to avoid accessing to texture when handling glyphs (can lead to AccessViolationException)
lock (_syncObj)
{
float pointSize = 64.0f * _charSet.RenderedSize * 72.0f / _resolution;
FT.FT_Set_Char_Size(_family.Face, (int)pointSize, 0, _resolution, 0);
// Font does not contain that glyph, the 'missing' glyph will be shown instead
if (glyphIndex == 0 && _charSet.GetCharacter(0) != null)
{
return(false);
}
// Load the glyph for the current character.
if (FT.FT_Load_Glyph(_family.Face, glyphIndex, FT.FT_LOAD_DEFAULT) != 0)
{
return(false);
}
FT_FaceRec face = (FT_FaceRec)Marshal.PtrToStructure(_family.Face, typeof(FT_FaceRec));
IntPtr glyphPtr;
// Load the glyph data into our local array.
if (FT.FT_Get_Glyph(face.glyph, out glyphPtr) != 0)
{
return(false);
}
// Convert the glyph to bitmap form.
if (FT.FT_Glyph_To_Bitmap(ref glyphPtr, FT_Render_Mode.FT_RENDER_MODE_NORMAL, IntPtr.Zero, 1) != 0)
{
return(false);
}
// Get the structure fron the intPtr
FT_BitmapGlyph glyph = (FT_BitmapGlyph)Marshal.PtrToStructure(glyphPtr, typeof(FT_BitmapGlyph));
// Width/height of char
int cwidth = glyph.bitmap.width;
int cheight = glyph.bitmap.rows;
// Width/height of char including padding
int pwidth = cwidth + 3 * PAD;
int pheight = cheight + 3 * PAD;
// Check glyph index is in the character set range.
if (!_charSet.IsInRange(glyphIndex))
{
return(false);
}
// Check glyph fits in our texture
if (_currentX + pwidth > MAX_WIDTH)
{
_currentX = 0;
_currentY += _rowHeight;
_rowHeight = 0;
}
if (_currentY + pheight > MAX_HEIGHT)
{
return(false);
}
// Create and store a BitmapCharacter for this glyph
_charSet.SetCharacter(glyphIndex, CreateCharacter(glyph));
// Copy the glyph bitmap to our local array
Byte[] bitmapBuffer = new Byte[cwidth * cheight];
if (glyph.bitmap.buffer != IntPtr.Zero)
{
Marshal.Copy(glyph.bitmap.buffer, bitmapBuffer, 0, cwidth * cheight);
}
// Write glyph bitmap to our texture
WriteGlyphToTexture(glyph, pwidth, pheight, bitmapBuffer);
_currentX += pwidth;
_rowHeight = Math.Max(_rowHeight, pheight);
// Free the glyph
FT.FT_Done_Glyph(glyphPtr);
}
return(true);
}
/// <summary>
/// Create a bitmap font from the specified dynamic font.
/// </summary>
static public bool CreateFont(Font ttf, int size, int faceIndex, bool kerning, string characters, int padding, out BMFont font, out Texture2D tex)
{
font = null;
tex = null;
if (ttf == null || !isPresent)
{
return(false);
}
IntPtr lib = IntPtr.Zero;
IntPtr face = IntPtr.Zero;
if (FT_Init_FreeType(out lib) != 0)
{
Debug.LogError("Failed to initialize FreeType");
return(false);
}
string fileName = Application.dataPath.Substring(0, Application.dataPath.Length - "Assets".Length) +
UnityEditor.AssetDatabase.GetAssetPath(ttf);
if (!File.Exists(fileName))
{
Debug.LogError("Unable to use the chosen font.");
}
else if (FT_New_Face(lib, fileName, faceIndex, out face) != 0)
{
Debug.LogError("Unable to use the chosen font (FT_New_Face).");
}
else
{
font = new BMFont();
font.charSize = size;
Color32 white = Color.white;
List <int> entries = new List <int>();
List <Texture2D> textures = new List <Texture2D>();
FT_FaceRec faceRec = (FT_FaceRec)Marshal.PtrToStructure(face, typeof(FT_FaceRec));
FT_Set_Pixel_Sizes(face, 0, (uint)size);
// Calculate the baseline value that would let the printed font be centered vertically
//int ascender = (faceRec.met.ascender >> 6);
//int descender = (faceRec.descender >> 6);
//int baseline = ((ascender - descender) >> 1);
//if ((baseline & 1) == 1) --baseline;
//Debug.Log(ascender + " " + descender + " " + baseline);
// Space character is not renderable
FT_Load_Glyph(face, FT_Get_Char_Index(face, 32), FT_LOAD_DEFAULT);
FT_GlyphSlotRec space = (FT_GlyphSlotRec)Marshal.PtrToStructure(faceRec.glyph, typeof(FT_GlyphSlotRec));
// Space is not visible and doesn't have a texture
BMGlyph spaceGlyph = font.GetGlyph(32, true);
spaceGlyph.offsetX = 0;
spaceGlyph.offsetY = 0;
spaceGlyph.advance = (space.metrics.horiAdvance >> 6);
spaceGlyph.channel = 15;
spaceGlyph.x = 0;
spaceGlyph.y = 0;
spaceGlyph.width = 0;
spaceGlyph.height = 0;
// Save kerning information
if (kerning)
{
for (int b = 0; b < characters.Length; ++b)
{
uint ch2 = characters[b];
if (ch2 == 32)
{
continue;
}
FT_Vector vec;
if (FT_Get_Kerning(face, ch2, 32, 0, out vec) != 0)
{
continue;
}
int offset = (vec.x >> 6);
if (offset != 0)
{
spaceGlyph.SetKerning((int)ch2, offset);
}
}
}
// Run through all requested characters
foreach (char ch in characters)
{
uint charIndex = FT_Get_Char_Index(face, (uint)ch);
FT_Load_Glyph(face, charIndex, FT_LOAD_DEFAULT);
FT_GlyphSlotRec glyph = (FT_GlyphSlotRec)Marshal.PtrToStructure(faceRec.glyph, typeof(FT_GlyphSlotRec));
FT_Render_Glyph(ref glyph, FT_Render_Mode.FT_RENDER_MODE_NORMAL);
if (glyph.bitmap.width > 0 && glyph.bitmap.rows > 0)
{
byte[] buffer = new byte[glyph.bitmap.width * glyph.bitmap.rows];
Marshal.Copy(glyph.bitmap.buffer, buffer, 0, buffer.Length);
Texture2D texture = new Texture2D(glyph.bitmap.width, glyph.bitmap.rows, UnityEngine.TextureFormat.ARGB32, false);
Color32[] colors = new Color32[buffer.Length];
for (int i = 0, y = 0; y < glyph.bitmap.rows; ++y)
{
for (int x = 0; x < glyph.bitmap.width; ++x)
{
white.a = buffer[i++];
colors[x + glyph.bitmap.width * (glyph.bitmap.rows - y - 1)] = white;
}
}
// Save the texture
texture.SetPixels32(colors);
texture.Apply();
textures.Add(texture);
entries.Add(ch);
// Record the metrics
BMGlyph bmg = font.GetGlyph(ch, true);
bmg.offsetX = (glyph.metrics.horiBearingX >> 6);
bmg.offsetY = -(glyph.metrics.horiBearingY >> 6);
bmg.advance = (glyph.metrics.horiAdvance >> 6);
bmg.channel = 15;
// Save kerning information
if (kerning)
{
for (int b = 0; b < characters.Length; ++b)
{
uint ch2 = characters[b];
if (ch2 == ch)
{
continue;
}
FT_Vector vec;
if (FT_Get_Kerning(face, ch2, ch, 0, out vec) != 0)
{
continue;
}
int offset = (vec.x >> 6);
if (offset != 0)
{
bmg.SetKerning((int)ch2, offset);
}
}
}
}
}
// Create a packed texture with all the characters
tex = new Texture2D(32, 32, TextureFormat.ARGB32, false);
Rect[] rects = tex.PackTextures(textures.ToArray(), padding);
// Make the RGB channel pure white
Color32[] cols = tex.GetPixels32();
for (int i = 0, imax = cols.Length; i < imax; ++i)
{
Color32 c = cols[i];
c.r = 255;
c.g = 255;
c.b = 255;
cols[i] = c;
}
tex.SetPixels32(cols);
tex.Apply();
font.texWidth = tex.width;
font.texHeight = tex.height;
int min = int.MaxValue;
int max = int.MinValue;
// Other glyphs are visible and need to be added
for (int i = 0, imax = entries.Count; i < imax; ++i)
{
// Destroy the texture now that it's a part of an atlas
UnityEngine.Object.DestroyImmediate(textures[i]);
textures[i] = null;
Rect rect = rects[i];
// Set the texture coordinates
BMGlyph glyph = font.GetGlyph(entries[i], true);
glyph.x = Mathf.RoundToInt(rect.x * font.texWidth);
glyph.y = Mathf.RoundToInt(rect.y * font.texHeight);
glyph.width = Mathf.RoundToInt(rect.width * font.texWidth);
glyph.height = Mathf.RoundToInt(rect.height * font.texHeight);
// Flip the Y since the UV coordinate system is different
glyph.y = font.texHeight - glyph.y - glyph.height;
max = Mathf.Max(max, -glyph.offsetY);
min = Mathf.Min(min, -glyph.offsetY - glyph.height);
}
int baseline = size + min;
baseline += ((max - min - size) >> 1);
// Offset all glyphs so that they are not using the baseline
for (int i = 0, imax = entries.Count; i < imax; ++i)
{
BMGlyph glyph = font.GetGlyph(entries[i], true);
glyph.offsetY += baseline;
}
}
if (face != IntPtr.Zero)
{
FT_Done_Face(face);
}
#if !UNITY_3_5
if (lib != IntPtr.Zero)
{
FT_Done_FreeType(lib);
}
#endif
return(tex != null);
}
private void CompileCharacterToTexture(FT_FaceRec face, int c)
{
FTGlyphOffset offset = new FTGlyphOffset();
//We first convert the number index to a character index
uint index = FT.FT_Get_Char_Index(faceptr, (uint)c);
string sError = "";
if (index == 0) sError = "No Glyph";
//Here we load the actual glyph for the character
int ret = FT.FT_Load_Glyph(faceptr, index, FT.FT_LOAD_DEFAULT);
if (ret != 0)
{
Console.Write("Load_Glyph failed for character " + c.ToString());
}
FT_GlyphSlotRec glyphrec = (FT_GlyphSlotRec)Marshal.PtrToStructure(face.glyph, typeof(FT_GlyphSlotRec));
ret = FT.FT_Render_Glyph(ref glyphrec, FT_Render_Mode.FT_RENDER_MODE_NORMAL);
if (ret != 0)
{
Console.Write("Render failed for character " + c.ToString());
}
int size = (glyphrec.bitmap.width * glyphrec.bitmap.rows);
if (size <= 0)
{
//Console.Write("Blank Character: " + c.ToString());
//space is a special `blank` character
extent_x[c] = 0;
if (c == 32)
{
Gl.glNewList((list_base + c), Gl.GL_COMPILE);
Gl.glTranslatef(font_size >> 1, 0, 0);
extent_x[c] = font_size >> 1;
Gl.glEndList();
offset.left = 0;
offset.top = 0;
offset.height = 0;
offset.width = extent_x[c];
offsets[c] = offset;
}
return;
}
byte[] bmp = new byte[size];
Marshal.Copy(glyphrec.bitmap.buffer, bmp, 0, bmp.Length);
//Next we expand the bitmap into an opengl texture
int width = next_po2(glyphrec.bitmap.width);
int height = next_po2(glyphrec.bitmap.rows);
byte[] expanded = new byte[2 * width * height];
for (int j = 0; j < height; j++)
{
for (int i = 0; i < width; i++)
{
//Luminance
expanded[2 * (i + j * width)] = (byte)255;
//expanded[4 * (i + j * width) + 1] = (byte)255;
//expanded[4 * (i + j * width) + 2] = (byte)255;
// Alpha
expanded[2 * (i + j * width) + 1] =
(i >= glyphrec.bitmap.width || j >= glyphrec.bitmap.rows) ?
(byte)0 : (byte)(bmp[i + glyphrec.bitmap.width * j]);
}
}
//Set up some texture parameters for opengl
Gl.glBindTexture(Gl.GL_TEXTURE_2D, textures[c]);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_S, Gl.GL_CLAMP_TO_EDGE);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_T, Gl.GL_CLAMP_TO_EDGE);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR);
//Create the texture
Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA, width, height,
0, Gl.GL_LUMINANCE_ALPHA, Gl.GL_UNSIGNED_BYTE, expanded);
expanded = null;
bmp = null;
//Create a display list and bind a texture to it
Gl.glNewList((list_base + c), Gl.GL_COMPILE);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, textures[c]);
//Account for freetype spacing rules
Gl.glTranslatef(glyphrec.bitmap_left, 0, 0);
Gl.glPushMatrix();
Gl.glTranslatef(0, glyphrec.bitmap_top - glyphrec.bitmap.rows, 0);
float x = (float)glyphrec.bitmap.width / (float)width;
float y = (float)glyphrec.bitmap.rows / (float)height;
offset.left = glyphrec.bitmap_left;
offset.top = glyphrec.bitmap_top;
offset.height = glyphrec.bitmap.rows;
offset.width = glyphrec.bitmap.width;
offset.advance = glyphrec.advance;
offset.lsb_delta = glyphrec.lsb_delta;
offset.rsb_delta = glyphrec.rsb_delta;
offset.linearHoriAdvance = glyphrec.linearHoriAdvance;
offset.linearVertAdvance = glyphrec.linearVertAdvance;
offsets[c] = offset;
//Draw the quad
Gl.glBegin(Gl.GL_QUADS);
Gl.glTexCoord2d(0, 0); Gl.glVertex2f(0, glyphrec.bitmap.rows);
Gl.glTexCoord2d(0, y); Gl.glVertex2f(0, 0);
Gl.glTexCoord2d(x, y); Gl.glVertex2f(glyphrec.bitmap.width, 0);
Gl.glTexCoord2d(x, 0); Gl.glVertex2f(glyphrec.bitmap.width, glyphrec.bitmap.rows);
Gl.glEnd();
Gl.glPopMatrix();
//Advance for the next character
Gl.glTranslatef(glyphrec.bitmap.width, 0, 0);
extent_x[c] = glyphrec.bitmap_left + glyphrec.bitmap.width;
Gl.glEndList();
sChars += "f:" + c.ToString() + "[w:" + glyphrec.bitmap.width.ToString() + "][h:" + glyphrec.bitmap.rows.ToString() + "]" + sError;
}
/// <summary>
/// Render the font to a series of OpenGL textures (one per letter)
/// </summary>
/// <param name="fontsize">size of the font</param>
/// <param name="DPI">dots-per-inch setting</param>
public void ftRenderToTexture(int fontsize, uint DPI)
{
font_size = fontsize;
face = (FT_FaceRec)Marshal.PtrToStructure(faceptr, typeof(FT_FaceRec));
Console.WriteLine("Num Faces:" + face.num_faces.ToString());
Console.WriteLine("Num Glyphs:" + face.num_glyphs.ToString());
Console.WriteLine("Num Char Maps:" + face.num_charmaps.ToString());
Console.WriteLine("Font Family:" + face.family_name);
Console.WriteLine("Style Name:" + face.style_name);
Console.WriteLine("Generic:" + face.generic);
Console.WriteLine("Bbox:" + face.bbox);
Console.WriteLine("Glyph:" + face.glyph);
// IConsole.Write("Num Glyphs:", );
//Freetype measures the font size in 1/64th of pixels for accuracy
//so we need to request characters in size*64
FT.FT_Set_Char_Size(faceptr, font_size << 6, font_size << 6, DPI, DPI);
//Provide a reasonably accurate estimate for expected pixel sizes
//when we later on create the bitmaps for the font
FT.FT_Set_Pixel_Sizes(faceptr, (uint)font_size, (uint)font_size);
// Once we have the face loaded and sized we generate opengl textures
// from the glyphs for each printable character
Console.WriteLine("Compiling Font Characters 0..127");
textures = new int[128];
extent_x = new int[128];
offsets = new FTGlyphOffset[128];
list_base = Gl.glGenLists(128);
Gl.glGenTextures(128, textures);
for (int c = 0; c < 128; c++)
{
CompileCharacterToTexture(face, c);
if (c < 127)
sChars += ",";
}
//Console.WriteLine("Font Compiled:" + sChars);
}
private void CompileCharacterToTexture(FT_FaceRec face, int c)
{
FTGlyphOffset offset = new FTGlyphOffset();
//We first convert the number index to a character index
uint index = FT.FT_Get_Char_Index(faceptr, (uint)c);
string sError = "";
if (index == 0)
{
sError = "No Glyph";
}
//Here we load the actual glyph for the character
int ret = FT.FT_Load_Glyph(faceptr, index, FT.FT_LOAD_DEFAULT);
if (ret != 0)
{
Console.Write("Load_Glyph failed for character " + c.ToString());
}
FT_GlyphSlotRec glyphrec = (FT_GlyphSlotRec)Marshal.PtrToStructure(face.glyph, typeof(FT_GlyphSlotRec));
ret = FT.FT_Render_Glyph(ref glyphrec, FT_Render_Mode.FT_RENDER_MODE_NORMAL);
if (ret != 0)
{
Console.Write("Render failed for character " + c.ToString());
}
int size = (glyphrec.bitmap.width * glyphrec.bitmap.rows);
if (size <= 0)
{
//Console.Write("Blank Character: " + c.ToString());
//space is a special `blank` character
extent_x[c] = 0;
if (c == 32)
{
Gl.glNewList((list_base + c), Gl.GL_COMPILE);
Gl.glTranslatef(font_size >> 1, 0, 0);
extent_x[c] = font_size >> 1;
Gl.glEndList();
offset.left = 0;
offset.top = 0;
offset.height = 0;
offset.width = extent_x[c];
offsets[c] = offset;
}
return;
}
byte[] bmp = new byte[size];
Marshal.Copy(glyphrec.bitmap.buffer, bmp, 0, bmp.Length);
//Next we expand the bitmap into an opengl texture
int width = next_po2(glyphrec.bitmap.width);
int height = next_po2(glyphrec.bitmap.rows);
byte[] expanded = new byte[2 * width * height];
for (int j = 0; j < height; j++)
{
for (int i = 0; i < width; i++)
{
//Luminance
expanded[2 * (i + j * width)] = (byte)255;
//expanded[4 * (i + j * width) + 1] = (byte)255;
//expanded[4 * (i + j * width) + 2] = (byte)255;
// Alpha
expanded[2 * (i + j * width) + 1] =
(i >= glyphrec.bitmap.width || j >= glyphrec.bitmap.rows) ?
(byte)0 : (byte)(bmp[i + glyphrec.bitmap.width * j]);
}
}
//Set up some texture parameters for opengl
Gl.glBindTexture(Gl.GL_TEXTURE_2D, textures[c]);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_S, Gl.GL_CLAMP_TO_EDGE);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_T, Gl.GL_CLAMP_TO_EDGE);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR);
//Create the texture
Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGBA, width, height,
0, Gl.GL_LUMINANCE_ALPHA, Gl.GL_UNSIGNED_BYTE, expanded);
expanded = null;
bmp = null;
//Create a display list and bind a texture to it
Gl.glNewList((list_base + c), Gl.GL_COMPILE);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, textures[c]);
//Account for freetype spacing rules
Gl.glTranslatef(glyphrec.bitmap_left, 0, 0);
Gl.glPushMatrix();
Gl.glTranslatef(0, glyphrec.bitmap_top - glyphrec.bitmap.rows, 0);
float x = (float)glyphrec.bitmap.width / (float)width;
float y = (float)glyphrec.bitmap.rows / (float)height;
offset.left = glyphrec.bitmap_left;
offset.top = glyphrec.bitmap_top;
offset.height = glyphrec.bitmap.rows;
offset.width = glyphrec.bitmap.width;
offset.advance = glyphrec.advance;
offset.lsb_delta = glyphrec.lsb_delta;
offset.rsb_delta = glyphrec.rsb_delta;
offset.linearHoriAdvance = glyphrec.linearHoriAdvance;
offset.linearVertAdvance = glyphrec.linearVertAdvance;
offsets[c] = offset;
//Draw the quad
Gl.glBegin(Gl.GL_QUADS);
Gl.glTexCoord2d(0, 0); Gl.glVertex2f(0, glyphrec.bitmap.rows);
Gl.glTexCoord2d(0, y); Gl.glVertex2f(0, 0);
Gl.glTexCoord2d(x, y); Gl.glVertex2f(glyphrec.bitmap.width, 0);
Gl.glTexCoord2d(x, 0); Gl.glVertex2f(glyphrec.bitmap.width, glyphrec.bitmap.rows);
Gl.glEnd();
Gl.glPopMatrix();
//Advance for the next character
Gl.glTranslatef(glyphrec.bitmap.width, 0, 0);
extent_x[c] = glyphrec.bitmap_left + glyphrec.bitmap.width;
Gl.glEndList();
sChars += "f:" + c.ToString() + "[w:" + glyphrec.bitmap.width.ToString() + "][h:" + glyphrec.bitmap.rows.ToString() + "]" + sError;
}
private static void InitLibrary()
{
Monitor.Enter(flag);
try
{
if (libraryinitialized)
{
return;
}
CheckFreeType(FT.FT_Init_FreeType(out FreeTypeLib));
libraryinitialized = true;
Strings npaths = GetFontDirectories();
foreach (string ndir in npaths)
{
if (Directory.Exists(ndir))
{
string[] nfiles = StreamUtil.GetFiles(ndir, "*.TTF|*.ttf|*.pf*", SearchOption.TopDirectoryOnly);
foreach (string nfile in nfiles)
{
IntPtr iface = (IntPtr)0;
FT_FaceRec aface = new FT_FaceRec();
CheckFreeType(FT.FT_New_Face(FreeTypeLib, nfile, 0, out iface));
try
{
aface = (FT_FaceRec)Marshal.PtrToStructure(iface, typeof(FT_FaceRec));
if ((aface.face_flags & (int)FT_Face_Flags.FT_FACE_FLAG_SCALABLE) != 0)
{
LogFontFt aobj = new LogFontFt();
aobj.ftlibrary = FreeTypeLib;
aobj.fullinfo = false;
// Fill font properties
aobj.type1 = ((int)FT_Face_Flags.FT_FACE_FLAG_SFNT & aface.face_flags) == 0;
if (aobj.type1)
{
aobj.convfactor = 1;
// aobj.convfactor:=1000/aface.units_per_EM;
aobj.widthmult = aobj.convfactor;
}
else
{
aobj.convfactor = 1;
// aobj.convfactor:=1000/aface.units_per_EM;
aobj.widthmult = aobj.convfactor;
}
aobj.filename = nfile;
string family_name = Marshal.PtrToStringAnsi(aface.family_name);
aobj.postcriptname = family_name.Replace(" ", "");
aobj.familyname = family_name;
aobj.keyname = family_name + "____";
aobj.fixedpitch = (aface.face_flags & (int)FT_Face_Flags.FT_FACE_FLAG_FIXED_WIDTH) != 0;
aobj.havekerning = (aface.face_flags & (int)FT_Face_Flags.FT_FACE_FLAG_KERNING) != 0;
int nleft = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.xMin));
int nright = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.xMax));
int ntop = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.yMax));
int nbottom = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.bbox.yMin));
aobj.BBox = new Rectangle(nleft, ntop, nright - nleft, nbottom - ntop);
aobj.ascent = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.ascender));
aobj.descent = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.descender));
aobj.leading = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.height) - (aobj.ascent - aobj.descent));
aobj.MaxWidth = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.max_advance_width));
aobj.Capheight = System.Convert.ToInt32(Math.Round(aobj.convfactor * aface.ascender));
string style_name = Marshal.PtrToStringAnsi(aface.style_name);
aobj.stylename = style_name;
aobj.bold = (aface.style_flags & (int)FT_Style_Flags.FT_STYLE_FLAG_BOLD) != 0;
aobj.italic = (aface.style_flags & (int)FT_Style_Flags.FT_STYLE_FLAG_ITALIC) != 0;
if (aobj.bold)
{
aobj.keyname = aobj.keyname + "B1";
}
else
{
aobj.keyname = aobj.keyname + "B0";
}
if (aobj.italic)
{
aobj.keyname = aobj.keyname + "I1";
}
else
{
aobj.keyname = aobj.keyname + "I0";
}
// Default font configuration, LUXI SANS is default
if ((!aobj.italic) && (!aobj.bold))
{
if (defaultfont == null)
{
defaultfont = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfont = aobj;
}
}
}
else
if ((!aobj.italic) && (aobj.bold))
{
if (defaultfontb == null)
{
defaultfontb = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfontb = aobj;
}
}
}
else
if ((aobj.italic) && (!aobj.bold))
{
if (defaultfontit == null)
{
defaultfontit = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfontit = aobj;
}
}
}
else
if ((aobj.italic) && (aobj.bold))
{
if (defaultfontbit == null)
{
defaultfontbit = aobj;
}
else
{
if (aobj.familyname.ToUpper() == "LUXI SANS")
{
defaultfontbit = aobj;
}
}
}
aobj.keyname = aobj.keyname.ToUpper();
if (fontlist.IndexOfKey(aobj.keyname) < 0)
{
fontlist.Add(aobj.keyname.ToUpper(), aobj);
}
}
int nindex = fontfiles.IndexOfKey(nfile);
if (nindex < 0)
{
fontfiles.Add(nfile, nfile);
}
}
finally
{
CheckFreeType(FT.FT_Done_Face(iface));
}
}
}
}
}
finally
{
Monitor.Exit(flag);
}
}
