FontGlyph GetGlyphWithoutBitmap(GlyphCollection collection, int codepoint)
{
FontGlyph glyph = null;
if (collection.Glyphs.TryGetValue(codepoint, out glyph))
{
return(glyph);
}
Font font;
var g = GetCodepointIndex(codepoint, out font);
if (g == 0)
{
collection.Glyphs[codepoint] = null;
return(null);
}
int advance, lsb, x0, y0, x1, y1;
font.BuildGlyphBitmap(g, FontSize, font.Scale, &advance, &lsb, &x0, &y0, &x1, &y1);
var pad = Math.Max(FontGlyph.PadFromBlur(BlurAmount), FontGlyph.PadFromBlur(StrokeAmount));
var gw = x1 - x0 + pad * 2;
var gh = y1 - y0 + pad * 2;
var offset = FontGlyph.PadFromBlur(BlurAmount);
glyph = new FontGlyph {
Font = font,
Codepoint = codepoint,
Size = FontSize,
Index = g,
Bounds = new Rectangle(0, 0, gw, gh),
XAdvance = (int)(font.Scale * advance * 10.0f),
XOffset = x0 - offset,
YOffset = y0 - offset
};
collection.Glyphs[codepoint] = glyph;
return(glyph);
}
public void RenderGlyph(GraphicsDevice device, FontGlyph glyph, int blurAmount, int strokeAmount)
{
var pad = Math.Max(FontGlyph.PadFromBlur(blurAmount), FontGlyph.PadFromBlur(strokeAmount));
// Render glyph to byte buffer
var bufferSize = glyph.Bounds.Width * glyph.Bounds.Height;
var buffer = _byteBuffer;
if ((buffer == null) || (buffer.Length < bufferSize))
{
buffer = new byte[bufferSize];
_byteBuffer = buffer;
}
Array.Clear(buffer, 0, bufferSize);
var g = glyph.Index;
var colorSize = glyph.Bounds.Width * glyph.Bounds.Height;
var colorBuffer = _colorBuffer;
if ((colorBuffer == null) || (colorBuffer.Length < colorSize))
{
colorBuffer = new Color[colorSize];
_colorBuffer = colorBuffer;
}
fixed(byte *dst = &buffer[pad + pad *glyph.Bounds.Width])
{
glyph.Font.RenderGlyphBitmap(dst,
glyph.Bounds.Width - pad * 2,
glyph.Bounds.Height - pad * 2,
glyph.Bounds.Width,
g);
}
if (strokeAmount > 0)
{
var width = glyph.Bounds.Width;
var top = width * strokeAmount;
var bottom = (glyph.Bounds.Height - strokeAmount) * glyph.Bounds.Width;
var right = glyph.Bounds.Width - strokeAmount;
var left = strokeAmount;
byte d;
for (var i = 0; i < colorSize; ++i)
{
var col = buffer[i];
var black = 0;
if (col == 255)
{
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = colorBuffer[i].A = 255;
continue;
}
if (i >= top)
{
black = buffer[i - top];
}
if (i < bottom)
{
d = buffer[i + top];
black = ((255 - d) * black + 255 * d) / 255;
}
if (i % width >= left)
{
d = buffer[i - strokeAmount];
black = ((255 - d) * black + 255 * d) / 255;
}
if (i % width < right)
{
d = buffer[i + strokeAmount];
black = ((255 - d) * black + 255 * d) / 255;
}
if (black == 0)
{
if (col == 0)
{
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = colorBuffer[i].A = 0; //black transparency to suit stroke
continue;
}
#if PREMULTIPLIEDALPHA
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = colorBuffer[i].A = col;
#else
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = 255;
colorBuffer[i].A = col;
#endif
}
else
{
if (col == 0)
{
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = 0;
colorBuffer[i].A = (byte)black;
continue;
}
#if PREMULTIPLIEDALPHA
var alpha = ((255 - col) * black + 255 * col) / 255;
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = (byte)((alpha * col) / 255);
colorBuffer[i].A = (byte)alpha;
#else
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = col;
colorBuffer[i].A = (byte)(((255 - col) * black + 255 * col) / 255);
#endif
}
}
}
else
{
if (blurAmount > 0)
{
fixed(byte *bdst = &buffer[0])
{
Blur(bdst, glyph.Bounds.Width, glyph.Bounds.Height, glyph.Bounds.Width, blurAmount);
}
}
for (var i = 0; i < colorSize; ++i)
{
var c = buffer[i];
#if PREMULTIPLIEDALPHA
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = colorBuffer[i].A = c;
#else
colorBuffer[i].R = colorBuffer[i].G = colorBuffer[i].B = 255;
colorBuffer[i].A = c;
#endif
}
}
// Write to texture
if (Texture == null)
{
Texture = new Texture2D(device, Width, Height);
}
#if TEXTURESETDATAEXT
fixed(Color *p = colorBuffer)
#if FNA
Texture.SetDataPointerEXT(0, glyph.Bounds, (IntPtr)p, colorSize * sizeof(Color));
#else
Texture.SetDataEXT(0, 0, glyph.Bounds, (IntPtr)p, colorSize * sizeof(Color));
#endif
#else
Texture.SetData(0, 0, glyph.Bounds, colorBuffer, 0, colorSize);
#endif
}