public void UpdateKerningData()
{
if (this.kerning)
{
int kerningSamples = (this.Ascent + this.Descent) / 4;
int[] kerningY;
if (kerningSamples <= 6)
{
kerningSamples = 6;
kerningY = new int[] {
this.BaseLine - this.Ascent,
this.BaseLine - this.BodyAscent,
this.BaseLine - this.BodyAscent * 2 / 3,
this.BaseLine - this.BodyAscent / 3,
this.BaseLine,
this.BaseLine + this.Descent};
}
else
{
kerningY = new int[kerningSamples];
int bodySamples = kerningSamples * 2 / 3;
int descentSamples = (kerningSamples - bodySamples) / 2;
int ascentSamples = kerningSamples - bodySamples - descentSamples;
for (int k = 0; k < ascentSamples; k++)
kerningY[k] = this.BaseLine - this.Ascent + k * (this.Ascent - this.BodyAscent) / ascentSamples;
for (int k = 0; k < bodySamples; k++)
kerningY[ascentSamples + k] = this.BaseLine - this.BodyAscent + k * this.BodyAscent / (bodySamples - 1);
for (int k = 0; k < descentSamples; k++)
kerningY[ascentSamples + bodySamples + k] = this.BaseLine + (k + 1) * this.Descent / descentSamples;
}
int[] c = new int[3];
for (int i = 0; i < SupportedChars.Length; ++i)
{
Pixmap.Layer glyphTemp = this.GetGlyphBitmap(SupportedChars[i]);
this.glyphs[i].kerningSamplesLeft = new int[kerningY.Length];
this.glyphs[i].kerningSamplesRight = new int[kerningY.Length];
if (SupportedChars[i] != ' ')
{
int pxIndex;
// Left side samples
for (int sampleIndex = 0; sampleIndex < this.glyphs[i].kerningSamplesLeft.Length; sampleIndex++)
{
this.glyphs[i].kerningSamplesLeft[sampleIndex] = glyphTemp.Width / 2;
for (int off = 0; off <= 2; off++)
{
pxIndex = MathF.Clamp(kerningY[sampleIndex] + off - 1, 0, glyphTemp.Height - 1) * glyphTemp.Width;
c[off] = 0;
while (glyphTemp.Data[pxIndex + c[off]].A == 0)
{
c[off]++;
if (c[off] >= glyphTemp.Width / 2) break;
}
this.glyphs[i].kerningSamplesLeft[sampleIndex] = Math.Min(this.glyphs[i].kerningSamplesLeft[sampleIndex], c[off]);
}
}
// Right side samples
for (int sampleIndex = 0; sampleIndex < this.glyphs[i].kerningSamplesRight.Length; sampleIndex++)
{
this.glyphs[i].kerningSamplesRight[sampleIndex] = glyphTemp.Width / 2;
for (int off = 0; off <= 2; off++)
{
pxIndex = MathF.Clamp(kerningY[sampleIndex] + off - 1, 0, glyphTemp.Height - 1) * glyphTemp.Width + glyphTemp.Width - 1;
c[off] = 0;
while (glyphTemp.Data[pxIndex - c[off]].A == 0)
{
c[off]++;
if (c[off] >= glyphTemp.Width / 2) break;
}
this.glyphs[i].kerningSamplesRight[sampleIndex] = Math.Min(this.glyphs[i].kerningSamplesRight[sampleIndex], c[off]);
}
}
}
glyphTemp.Dispose();
}
}
else
{
for (int i = 0; i < SupportedChars.Length; ++i)
{
this.glyphs[i].kerningSamplesLeft = null;
this.glyphs[i].kerningSamplesRight = null;
}
}
}
