private FT_GlyphSlotRec GetCharBitmap(uint c)
{
uint index = FT.FT_Get_Char_Index(faceptr, c);
int ret = FT.FT_Load_Glyph(faceptr, index, FT.FT_LOAD_DEFAULT);
FT_GlyphSlotRec glyph_rec = (FT_GlyphSlotRec)Marshal.PtrToStructure(face.glyph, typeof(FT_GlyphSlotRec));
int retb = FT.FT_Render_Glyph(ref glyph_rec, FT_Render_Mode.FT_RENDER_MODE_NORMAL);
return(glyph_rec);
}
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);
}
static extern int FT_Render_Glyph (ref FT_GlyphSlotRec slot, FT_Render_Mode render_mode);
/// <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);
}
static extern int FT_Render_Glyph(ref FT_GlyphSlotRec slot, FT_Render_Mode render_mode);
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;
}
public CharacterInfo RequestCharacterInfo(int charactorCode)
{
var glyphIndex = FT.FT_Get_Char_Index(face.Face, (uint)charactorCode);
if (glyphIndex == 0)
{
return(null);
}
FT_Error error;
error = FT.FT_Load_Glyph(face.Face, glyphIndex, FT.FT_LOAD_DEFAULT);
if (error != FT_Error.FT_Err_Ok)
{
throw new FreeTypeException(error);
}
FT_Render_Mode renderMode = antialias ? FT_Render_Mode.FT_RENDER_MODE_NORMAL : FT_Render_Mode.FT_RENDER_MODE_MONO;
IntPtr pGlyphSlot;
unsafe
{
pGlyphSlot = (IntPtr)face.GlyphSlot;
}
error = FT.FT_Render_Glyph(pGlyphSlot, renderMode);
if (error != FT_Error.FT_Err_Ok)
{
throw new FreeTypeException(error);
}
FT_GlyphSlotRec glyphSlot = (FT_GlyphSlotRec)Marshal.PtrToStructure(pGlyphSlot, typeof(FT_GlyphSlotRec));
FT_Bitmap bitmap = glyphSlot.bitmap;
if (bitmap.buffer == IntPtr.Zero)
{
return(new CharacterInfo(this, charactorCode, new Vector2((int)glyphSlot.advance.x >> 6, (int)glyphSlot.advance.y >> 6)));
}
Texture texture = Font.atlas.Allocate(bitmap.width, bitmap.rows);
switch ((FT_Pixel_Mode)bitmap.pixel_mode)
{
case FT_Pixel_Mode.FT_PIXEL_MODE_GRAY:
{
uint length = bitmap.width * bitmap.rows;
byte[] buffer = new Byte[length];
Marshal.Copy(bitmap.buffer, buffer, 0, (int)length);
Color[] pixels = new Color[length];
int count = 0;
for (int y = (int)bitmap.rows - 1; y >= 0; y--)
{
for (int x = 0; x < bitmap.width; x++)
{
int index = y * (int)bitmap.width + x;
pixels[count] = new Color {
r = 1, g = 1, b = 1, a = (float)buffer[index] / 255.0f
};
count++;
}
}
texture.SetPixels(pixels);
}
break;
case FT_Pixel_Mode.FT_PIXEL_MODE_MONO:
{
uint length = bitmap.width * bitmap.rows;
byte[] buffer = new Byte[bitmap.pitch * bitmap.rows];
Marshal.Copy(bitmap.buffer, buffer, 0, (int)buffer.Length);
Color[] pixels = new Color[length];
int count = 0;
for (int y = (int)bitmap.rows - 1; y >= 0; y--)
{
for (int x = 0; x < bitmap.width; x++)
{
int index = y * bitmap.pitch + (int)(x / 8);
byte group = buffer[index];
float pixel = (group & (1 << (7 - x % 8))) > 0 ? 255.0f : 0;
pixels[count] = new Color {
r = 1, g = 1, b = 1, a = pixel / 255.0f
};
count++;
}
}
texture.SetPixels(pixels);
}
break;
default:
throw new NotImplementedException(string.Format("Pixel mode ({0})", bitmap.pixel_mode.ToString()));
}
return(new CharacterInfo(
this,
charactorCode,
new Vector2((float)glyphSlot.advance.x / (float)(1 << 6), (float)glyphSlot.advance.y / (float)(1 << 6)),
texture,
new Vector2(glyphSlot.bitmap_left, glyphSlot.bitmap_top)
));
}
