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