static Bitmap GetImageFromPixel(byte[] pixel, Color32[] colorTable, bool interlactFlag, int iw, int ih)
{
Bitmap img = new Bitmap(iw, ih);
BitmapData bmpData = img.LockBits(new Rectangle(0, 0, iw, ih), ImageLockMode.ReadWrite, img.PixelFormat);
unsafe
{
Color32* p = (Color32*)bmpData.Scan0.ToPointer();
Color32* tempPointer = p;
int offSet = 0;
if (interlactFlag)
{
#region ��֯�洢ģʽ
int i = 0;
int pass = 0;//��ǰͨ��
while (pass < 4)
{
//�ܹ���4��ͨ��
if (pass == 1)
{
p = tempPointer;
p += (4 * iw );
offSet += 4 * iw;
}
else if (pass == 2)
{
p = tempPointer;
p += (2 * iw );
offSet += 2 * iw;
}
else if (pass == 3)
{
p = tempPointer;
p += (1 * iw);
offSet += 1 * iw;
}
int rate = 2;
if (pass == 0 | pass == 1)
{
rate = 8;
}
else if (pass == 2)
{
rate = 4;
}
while (i < pixel.Length)
{
*p++ = colorTable[pixel[i++]];
offSet++;
if (i % (iw) == 0)
{
p += (iw * (rate - 1));
offSet += (iw * (rate - 1));
if ( offSet >= pixel.Length)
{
pass++;
offSet = 0;
break;
}
}
}
}
#endregion
}
else
{
int i = 0;
for (i = 0; i < pixel.Length; )
{
*p++ = colorTable[pixel[i++]];
}
}
}
img.UnlockBits(bmpData);
return img;
}
internal void AddColor(Color32* pixel, int level,OcTree tree)
{
//�������Ҷ�ˣ���ʾһ����ɫ����������
if (this.Leaf)
{
Increment(pixel);
tree.TracePrevious(this);
return;
}
int shift = 7 - level;
int index = ((pixel->Red & mask[level]) >> (shift - 2)) |
((pixel->Green & mask[level]) >> (shift - 1)) |
((pixel->Blue & mask[level]) >> (shift));
OcTreeNode child = Children[index];
if (child == null)
{
child = new OcTreeNode(ColorDepth, level+1, tree);
Children[index] = child;
}
child.AddColor(pixel, ++level,tree);
}
internal void GetPalltte( List<Color32> palltte)
{
if (Leaf)
{
paletteIndex++;
//����ﵽ��Ҷ�ӣ��������ɫ����
Color32 color = new Color32();
color.Alpha = 255;
color.Red = (byte)(Red / PixelCount);
color.Green = (byte)(Green / PixelCount);
color.Blue = (byte)(Blue / PixelCount);
palltte.Add(color);
}
else
{
for (int i = 0; i < ColorDepth; i++)
{
if (Children[i] != null)
{
Children[i].GetPalltte(palltte);
}
}
}
}
internal void Increment(Color32* pixel)
{
Red += pixel->Red;
Green += pixel->Green;
Blue += pixel->Blue;
PixelCount++;
}
internal int GetPaletteIndex(Color32* pixel,int level)
{
int pindex = paletteIndex;
if (!Leaf)
{
int shift = 7 - level;
int index = ((pixel->Red & mask[level]) >> (shift - 2)) |
((pixel->Green & mask[level]) >> (shift - 1)) |
((pixel->Blue & mask[level]) >> (shift));
OcTreeNode child = Children[index];
if (child != null)
{
child.GetPaletteIndex(pixel, level + 1);
}
else
throw new Exception("����Ԥ�ϵ����鷢����!");
}
return pindex;
}
