private FontGlyph GetGlyph(Font font, int codepoint, int isize, int iblur, int bitmapOption)
{
var i = 0;
var g = 0;
var advance = 0;
var lsb = 0;
var x0 = 0;
var y0 = 0;
var x1 = 0;
var y1 = 0;
var gw = 0;
var gh = 0;
var gx = 0;
var gy = 0;
var x = 0;
var y = 0;
float scale = 0;
FontGlyph glyph = null;
int h = 0;
var size = isize / 10.0f;
var pad = 0;
var added = 0;
var renderFont = font;
if (isize < 2)
{
return(null);
}
if (iblur > 20)
{
iblur = 20;
}
pad = iblur + 2;
h = HashInt(codepoint) & (256 - 1);
i = font.Lut[h];
while (i != -1)
{
if (font.Glyphs[i].Codepoint == codepoint && font.Glyphs[i].Size == isize &&
font.Glyphs[i].Blur == iblur)
{
glyph = font.Glyphs[i];
if (bitmapOption == FONS_GLYPH_BITMAP_OPTIONAL || glyph.X0 >= 0 && glyph.Y0 >= 0)
{
return(glyph);
}
break;
}
i = font.Glyphs[i].Next;
}
g = font._font.fons__tt_getGlyphIndex((int)codepoint);
if (g == 0)
{
for (i = 0; i < font.FallbacksCount; ++i)
{
var fallbackFont = _fonts[font.Fallbacks[i]];
var fallbackIndex = fallbackFont._font.fons__tt_getGlyphIndex((int)codepoint);
if (fallbackIndex != 0)
{
g = fallbackIndex;
renderFont = fallbackFont;
break;
}
}
}
scale = renderFont._font.fons__tt_getPixelHeightScale(size);
renderFont._font.fons__tt_buildGlyphBitmap(g, size, scale, &advance, &lsb, &x0, &y0, &x1, &y1);
gw = x1 - x0 + pad * 2;
gh = y1 - y0 + pad * 2;
if (bitmapOption == FONS_GLYPH_BITMAP_REQUIRED)
{
added = _atlas.AddRect(gw, gh, &gx, &gy);
if (added == 0)
{
throw new Exception("FONS_ATLAS_FULL");
}
}
else
{
gx = -1;
gy = -1;
}
if (glyph == null)
{
glyph = AllocGlyph(font);
glyph.Codepoint = codepoint;
glyph.Size = isize;
glyph.Blur = iblur;
glyph.Next = 0;
glyph.Next = font.Lut[h];
font.Lut[h] = font.GlyphsNumber - 1;
}
glyph.Index = g;
glyph.X0 = (int)gx;
glyph.Y0 = (int)gy;
glyph.X1 = (int)(glyph.X0 + gw);
glyph.Y1 = (int)(glyph.Y0 + gh);
glyph.XAdvance = (int)(scale * advance * 10.0f);
glyph.XOffset = (int)(x0 - pad);
glyph.YOffset = (int)(y0 - pad);
if (bitmapOption == FONS_GLYPH_BITMAP_OPTIONAL)
return(glyph);
fixed(byte *dst = &_texData[glyph.X0 + pad + (glyph.Y0 + pad) * _params_.Width])
{
renderFont._font.fons__tt_renderGlyphBitmap(dst, gw - pad * 2, gh - pad * 2, _params_.Width, scale,
scale, g);
}
fixed(byte *dst = &_texData[glyph.X0 + glyph.Y0 *_params_.Width])
{
for (y = 0; y < gh; y++)
{
dst[y * _params_.Width] = 0;
dst[gw - 1 + y * _params_.Width] = 0;
}
for (x = 0; x < gw; x++)
{
dst[x] = 0;
dst[x + (gh - 1) * _params_.Width] = 0;
}
}
if (iblur > 0)
{
fixed(byte *bdst = &_texData[glyph.X0 + glyph.Y0 *_params_.Width])
{
Blur(bdst, gw, gh, _params_.Width, iblur);
}
}
_dirtyRect[0] = Math.Min(_dirtyRect[0], glyph.X0);
_dirtyRect[1] = Math.Min(_dirtyRect[1], glyph.Y0);
_dirtyRect[2] = Math.Max(_dirtyRect[2], glyph.X1);
_dirtyRect[3] = Math.Max(_dirtyRect[3], glyph.Y1);
return(glyph);
}