internal virtual void EncodeLevel(VoidPtr dstAddr, DIB dib, Bitmap src, int dStep, int sStep, int level)
{
int mw = dib.Width, mh = dib.Height, aw = mw.Align(BlockWidth);
if (level != 1)
{
dstAddr += GetMipOffset(ref mw, ref mh, level);
using (Bitmap mip = src.GenerateMip(level))
dib.ReadBitmap(mip, mw, mh);
}
mw = mw.Align(BlockWidth);
mh = mh.Align(BlockHeight);
int bStride = mw * BitsPerPixel / 8;
for (int y = 0; y < mh; y += BlockHeight)
{
VoidPtr sPtr = (int)dib.Scan0 + (y * dib.Stride);
VoidPtr dPtr = dstAddr + (y * bStride);
for (int x = 0; x < mw; x += BlockWidth, dPtr += dStep, sPtr += sStep)
{
EncodeBlock((ARGBPixel *)sPtr, dPtr, aw);
}
}
}
public static unsafe void CopyTo(this Bitmap bmp, Bitmap dest)
{
int w = Math.Min(bmp.Width, dest.Width);
int h = Math.Min(bmp.Height, dest.Height);
using (DIB dib = new DIB(w, h, dest.PixelFormat))
{
dib.ReadBitmap(bmp, w, h);
dib.WriteBitmap(dest, w, h);
}
}