/// <summary>
/// (Re-)Generates the texture.
/// </summary>
public void RegenerateTexture()
{
Width = Height = 0;
//Height = Math.Abs(_fontFace.BBox.Bottom) + _fontFace.BBox.Top;
Positions = new Dictionary <char, CharParameter>();
_fontFace.SetCharSize(0, FontSize, 0, 96);
var pos = new Dictionary <char, float[]>();
foreach (char c in CharSet)
{
_fontFace.LoadChar(c, LoadFlags.Render, LoadTarget.Normal);
pos.Add(c, new [] { (float)_fontFace.Glyph.Bitmap.Width, Width });
Width += (int)_fontFace.Glyph.Advance.X + 2;
Height = Math.Max(_fontFace.Glyph.Bitmap.Rows, Height);
}
_fontFace.LoadChar('_', LoadFlags.Render, LoadTarget.Normal);
SpaceWidth = _fontFace.Glyph.Advance.X.ToSingle();
float bBoxHeight = (Math.Abs(_fontFace.BBox.Bottom) + _fontFace.BBox.Top);
float bBoxTopScale = _fontFace.BBox.Top / bBoxHeight;
float baseline = (Height * bBoxTopScale) + BaselineAdjust;
Map = new Bitmap(Width, Height);
using (Graphics g = Graphics.FromImage(Map))
{
g.Clear(Color.Transparent);
foreach (var keyvalue in pos)
{
_fontFace.LoadChar(keyvalue.Key, LoadFlags.Render, LoadTarget.Normal);
int y = ((int)baseline - (int)_fontFace.Glyph.Metrics.HorizontalBearingY);
g.DrawImageUnscaled(_fontFace.Glyph.Bitmap.ToGdipBitmap(Color.White), (int)keyvalue.Value[1], y);
Vector2 offset = new Vector2(keyvalue.Value[1] / Width, 0);
Vector2 scale = new Vector2(keyvalue.Value[0] / Width, 1);
Positions.Add(keyvalue.Key, new CharParameter()
{
Advance = (int)_fontFace.Glyph.LinearHorizontalAdvance,
BearingX = _fontFace.Glyph.BitmapLeft,
Width = keyvalue.Value[0],
TextureMatrix = TextureTransformation.CalculateMatrix(offset,
scale, 0),
});
}
}
}
/// <summary>
/// Adjusts <see cref="Size"/> for the texture transform.
/// <para>In this way you can make sure, the texture is not stretched.</para>
/// </summary>
/// <param name="transform"></param>
public void AdjustSizeToTextureTransform(TextureTransformation transform)
{
Size.Set(transform.Scale * Size);
}
