//tiles = 16 means 16 x 16 atlas
public List <Bitmap> Atlas2dInto1d(Bitmap atlas2d, int tiles, int atlassizezlimit)
{
IFastBitmap orig = d_FastBitmapFactory();
orig.bmp = atlas2d;
int tilesize = atlas2d.Width / tiles;
int atlasescount = Math.Max(1, (tiles * tiles * tilesize) / atlassizezlimit);
List <Bitmap> atlases = new List <Bitmap>();
orig.Lock();
//256 x 1
IFastBitmap atlas1d = null;
for (int i = 0; i < tiles * tiles; i++)
{
int x = i % tiles;
int y = i / tiles;
int tilesinatlas = (tiles * tiles / atlasescount);
if (i % tilesinatlas == 0)
{
if (atlas1d != null)
{
atlas1d.Unlock();
atlases.Add(atlas1d.bmp);
}
atlas1d = d_FastBitmapFactory();
atlas1d.bmp = new Bitmap(tilesize, atlassizezlimit);
atlas1d.Lock();
}
for (int xx = 0; xx < tilesize; xx++)
{
for (int yy = 0; yy < tilesize; yy++)
{
int c = orig.GetPixel(x * tilesize + xx, y * tilesize + yy);
atlas1d.SetPixel(xx, (i % tilesinatlas) * tilesize + yy, c);
}
}
}
atlas1d.Unlock();
atlases.Add(atlas1d.bmp);
orig.Unlock();
return(atlases);
}