protected void AnalyzePixels()
{
int len = this.pixels.Length;
int nPix = len / 3;
this.indexedPixels = new byte[nPix];
NeuQuant nq = new NeuQuant(this.pixels, len, this.sample);
// initialize quantizer
this.colorTab = nq.Process(); // create reduced palette
int k = 0;
for (int i = 0; i < nPix; i++)
{
int index = nq.Map(this.pixels[k++] & 0xff, this.pixels[k++] & 0xff, this.pixels[k++] & 0xff);
this.usedEntry[index] = true;
this.indexedPixels[i] = (byte)index;
}
this.pixels = null;
this.colorDepth = 8;
this.palSize = 7;
// get closest match to transparent color if specified
if (this.transparent != Color.Empty)
{
this.transIndex = this.FindClosest(this.transparent);
}
}
/**
* Analyzes image colors and creates color map.
*/
protected void AnalyzePixels()
{
int len = this.pixels.Length;
int nPix = len / 3;
this.indexedPixels = new byte[nPix];
NeuQuant nq = new NeuQuant(this.pixels, len, this.sample);
// initialize quantizer
this.colorTab = nq.Process(); // create reduced palette
// convert map from BGR to RGB
// for (int i = 0; i < colorTab.Length; i += 3)
// {
// byte temp = colorTab[i];
// colorTab[i] = colorTab[i + 2];
// colorTab[i + 2] = temp;
// usedEntry[i / 3] = false;
// }
// map image pixels to new palette
int k = 0;
for (int i = 0; i < nPix; i++)
{
int index = nq.Map(this.pixels[k++] & 0xff, this.pixels[k++] & 0xff, this.pixels[k++] & 0xff);
this.usedEntry[index] = true;
this.indexedPixels[i] = (byte)index;
}
this.pixels = null;
this.colorDepth = 8;
this.palSize = 7;
// get closest match to transparent color if specified
if (this.transparent != Color.Empty)
{
this.transIndex = this.FindClosest(this.transparent);
}
}