private void HandleTransparency()
{
//ColorTable = NonIndexedPixels.AsParallel().GroupBy(x => x)
// .OrderByDescending(g => g.Count()) //Order by most frequent values
// .Select(g => g.FirstOrDefault()) //take the first among the group
// .Take(MaximumNumberColor).ToList();
//Make sure that the transparent color is added to list.
if (TransparentColor.HasValue && (!IsFirstFrame || UseGlobalColorTable))// && ColorTable.Count == MaximumNumberColor)
{
//Only adds if there is MaximumNumberColor colors, so I need to make sure that the color won't be ignored.
//If there is less than MaximumNumberColor selected colors, it means that the transparent color is already selected.
//If the color isn't on the list, add or replace.
if (ColorTable.AsParallel().All(x => x != TransparentColor.Value))
{
//Adds to the last spot, keeping it sorted. (Since all the colors are ordered by descending)
ColorTable.Insert(ColorTable.Count - 1, TransparentColor.Value);
//Remove the exceding value at the last position.
if (ColorTable.Count > MaximumNumberColor)
{
ColorTable.RemoveAt(MaximumNumberColor);
}
}
}
//I need to signal the other method that I won't need transparency.
WillUseTransparency = !IsFirstFrame && TransparentColor.HasValue && ColorTable.Contains(TransparentColor.Value);
}
private void GeneratePalette()
{
//TODO: more ways to decide which color to get
//Like removing similar colors (with less than 5% similarity) if there is more than 256 colors, etc.
//I probably can do that, using the groupby method.
ColorTable = NonIndexedPixels.AsParallel().GroupBy(x => x)
.OrderByDescending(g => g.Count()) //Order by most frequent values
.Select(g => g.FirstOrDefault()) //take the first among the group
.Take(MaximumNumberColor).ToList();
#region Handle transparency
//Make sure that the transparent color is added to list.
if (TransparentColor.HasValue && (!IsFirstFrame || UseGlobalColorTable) && ColorTable.Count == MaximumNumberColor)
{
//Only adds if there is MaximumNumberColor colors, so I need to make sure that the color won't be ignored.
//If there is less than MaximumNumberColor selected colors, it means that the transparent color is already selected.
//If the color isn't on the list, add or replace.
if (ColorTable.AsParallel().All(x => x != TransparentColor.Value))
{
//Adds to the last spot, keeping it sorted. (Since all the colors are ordered by descending)
ColorTable.Insert(MaximumNumberColor - 1, TransparentColor.Value);
//Remove the exceding value at the last position.
ColorTable.RemoveAt(MaximumNumberColor);
}
}
//I need to signal the other method that I won't need transparency.
WillUseTransparency = !IsFirstFrame && TransparentColor.HasValue && ColorTable.Contains(TransparentColor.Value);
#endregion
}