private bool SelectColors(int targetColors)
{
int splitAxis;
ColorBox * splitBox, boxPtr = _boxes;
ARGBPixel * sPtr = _srcPixels;
ColorEntry **gPtr = _groupTable;
ColorEntry * entry;
ushort id;
//Create initial box
boxPtr->Initialize();
_boxCount = 1;
//Iterate through colors using ID generator
for (int i = 0; i < _size; i++)
{
_idFunc(*sPtr++, &id);
gPtr = _groupTable + id;
if ((entry = *gPtr) == null)
{
*gPtr = entry = ColorEntry.Create();
_idConv(&id, out entry->_color);
entry->_weight = 1;
boxPtr->_rootEntry->InsertPrev(entry);
}
else
{
entry->_weight++;
}
}
//If no quantization is necessary, then leave.
if (boxPtr->_colors <= targetColors)
{
return(false);
}
//Update initial box
boxPtr->Update(targetColors - 1);
//Split until we reach desired colors
while (_boxCount < targetColors)
{
//Find split candidate
splitBox = ColorBox.FindSplit(_boxes, _boxCount, targetColors, out splitAxis);
//Create new box
(++boxPtr)->Initialize();
//Move colors from one box to another using split axis
splitBox->Split(boxPtr, splitAxis);
//Update boxes
_boxCount++;
splitBox->Update(targetColors - _boxCount);
boxPtr->Update(targetColors - _boxCount);
}
return(true);
}
private MedianCut(Bitmap bmp, WiiPixelFormat texFormat, WiiPaletteFormat palFormat)
{
//Set output format
if (texFormat == WiiPixelFormat.CI4)
{
_outFormat = PixelFormat.Format4bppIndexed;
}
else if (texFormat == WiiPixelFormat.CI8)
{
_outFormat = PixelFormat.Format8bppIndexed;
}
else
{
throw new ArgumentException("Invalid pixel format.");
}
//Set conversion functions
if (palFormat == WiiPaletteFormat.IA8)
{
_idFunc = IA8Handler;
_idConv = IA8Converter;
}
else if (palFormat == WiiPaletteFormat.RGB565)
{
_idFunc = RGB565Handler;
_idConv = RGB565Converter;
}
else
{
_idFunc = RGB5A3Handler;
_idConv = RGB5A3Converter;
}
//Lock/set source data
_srcBmp = bmp;
_width = bmp.Width;
_height = bmp.Height;
_size = _width * _height;
_srcData = bmp.LockBits(new Rectangle(0, 0, _width, _height), ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
_srcPixels = (ARGBPixel *)_srcData.Scan0;
//Create buffers
_boxes = (ColorBox *)Marshal.AllocHGlobal(256 * sizeof(ColorBox));
_groupTable = (ColorEntry **)Marshal.AllocHGlobal(65536 * sizeof(void *));
}
public void Dispose()
{
if (_boxes != null)
{
Marshal.FreeHGlobal((IntPtr)_boxes);
_boxes = null;
}
if (_groupTable != null)
{
Marshal.FreeHGlobal((IntPtr)_groupTable);
_groupTable = null;
}
if (_srcBmp != null)
{
_srcBmp.UnlockBits(_srcData);
_srcBmp = null;
_srcData = null;
_srcPixels = null;
}
GC.SuppressFinalize(this);
}
private MedianCut(Bitmap bmp, WiiPixelFormat texFormat, WiiPaletteFormat palFormat)
{
//Set output format
if (texFormat == WiiPixelFormat.CI4)
_outFormat = PixelFormat.Format4bppIndexed;
else if (texFormat == WiiPixelFormat.CI8)
_outFormat = PixelFormat.Format8bppIndexed;
else
throw new ArgumentException("Invalid pixel format.");
//Set conversion functions
if (palFormat == WiiPaletteFormat.IA8)
{
_idFunc = IA8Handler;
_idConv = IA8Converter;
}
else if (palFormat == WiiPaletteFormat.RGB565)
{
_idFunc = RGB565Handler;
_idConv = RGB565Converter;
}
else
{
_idFunc = RGB5A3Handler;
_idConv = RGB5A3Converter;
}
//Lock/set source data
_srcBmp = bmp;
_width = bmp.Width;
_height = bmp.Height;
_size = _width * _height;
_srcData = bmp.LockBits(new Rectangle(0, 0, _width, _height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
_srcPixels = (ARGBPixel*)_srcData.Scan0;
//Create buffers
_boxes = (ColorBox*)Marshal.AllocHGlobal(256 * sizeof(ColorBox));
_groupTable = (ColorEntry**)Marshal.AllocHGlobal(65536 * 4);
}
public void Dispose()
{
if (_boxes != null)
{
Marshal.FreeHGlobal((IntPtr)_boxes);
_boxes = null;
}
if (_groupTable != null)
{
Marshal.FreeHGlobal((IntPtr)_groupTable);
_groupTable = null;
}
if (_srcBmp != null)
{
_srcBmp.UnlockBits(_srcData);
_srcBmp = null;
_srcData = null;
_srcPixels = null;
}
GC.SuppressFinalize(this);
}
