public GrayScaleLetterGlyph GetGrayScaleLetter(char ch)
{
lock (Glyphs)
{
if (!Glyphs.ContainsKey(ch))
{
Glyphs[ch] = GrayScaleLetterGlyph.CreateGlyph(Typeface, GlyphTypeface, EmSize, ch);
}
return(Glyphs[ch]);
}
}
public GrayScaleLetterGlyph GetGrayScaleLetter(char ch)
{
lock (this.Glyphs)
{
if (!this.Glyphs.ContainsKey(ch))
{
this.Glyphs[ch] = GrayScaleLetterGlyph.CreateGlyph(this.Typeface, this.GlyphTypeface, this.EmSize, ch);
}
return(this.Glyphs[ch]);
}
}
public static unsafe void DrawLetter(this BitmapContext context, int x0, int y0, IntRect cliprect, Color fontColor, GrayScaleLetterGlyph glyph)
{
if (glyph.Items == null)
{
return;
}
// Use refs for faster access (really important!) speeds up a lot!
var w = context.Width;
var h = context.Height;
var pixels = context.Pixels;
int fr = fontColor.R;
int fg = fontColor.G;
int fb = fontColor.B;
var xmin = cliprect.Left;
var ymin = cliprect.Top;
var xmax = cliprect.Right;
var ymax = cliprect.Bottom;
if (xmin < 0)
{
xmin = 0;
}
if (ymin < 0)
{
ymin = 0;
}
if (xmax >= w)
{
xmax = w - 1;
}
if (ymax >= h)
{
ymax = h - 1;
fixed(GrayScaleLetterGlyph.Item *items = glyph.Items)
{
var itemCount = glyph.Items.Length;
var currentItem = items;
for (var i = 0; i < itemCount; i++, currentItem++)
{
var x = x0 + currentItem->X;
var y = y0 + currentItem->Y;
var alpha = currentItem->Alpha;
if (x < xmin || y < ymin || x > xmax || y > ymax)
{
continue;
}
var color = pixels[y * w + x];
var r = ((color >> 16) & 0xFF);
var g = ((color >> 8) & 0xFF);
var b = ((color) & 0xFF);
r = (((r << 12) + (fr - r) * alpha) >> 12) & 0xFF;
g = (((g << 12) + (fg - g) * alpha) >> 12) & 0xFF;
b = (((b << 12) + (fb - b) * alpha) >> 12) & 0xFF;
pixels[y * w + x] = (0xFF << 24) | (r << 16) | (g << 8) | (b);
}
}
}
