public unsafe void BitBlt(BitmapSurface destinationBitmap, int top, int left, int height, int width)
{
lock (LockObject)
{
// Find smallest array
//int size = (int)Math.Min(ByteLength, destinationBitmap.ByteLength) / destinationBitmap.BytesPerPixel;
// Copy memory
//CopyMemory(ImageData, destinationBitmap.ImageData, size);
//Marshal.Copy(src, destinationBitmap.ImageData, 0, size);
// First copy int64 as far as we can (faster than copying single bytes)
Int64* src64 = (Int64*)ImageData;
Int64* dst64 = (Int64*)destinationBitmap.ImageData;
byte* src8 = (byte*)ImageData;
byte* dst8 = (byte*)destinationBitmap.ImageData;
int maxWidth = Math.Min(Math.Min((int)Width - left, (int)destinationBitmap.Width - left), width + top);
int maxHeight = Math.Min(Math.Min((int)Height - top, (int)destinationBitmap.Height - top), height + top);
for (int x = top; x < maxHeight; x++) {
for (int y = left; y < maxWidth; y++) {
int srcp = (x * (int)Width) + y;
int dstp = (x * (int)destinationBitmap.Width) + y;
dst8[dstp] = src8[srcp];
}
}
}
}
public unsafe void BitBlt(BitmapSurface destinationBitmap)
{
lock (LockObject)
{
// Find smallest array
//int size = (int)Math.Min(ByteLength, destinationBitmap.ByteLength) / destinationBitmap.BytesPerPixel;
// Copy memory
//CopyMemory(ImageData, destinationBitmap.ImageData, size);
//Marshal.Copy(src, destinationBitmap.ImageData, 0, size);
// First copy int64 as far as we can (faster than copying single bytes)
int copied = 0;
Int64* src64 = (Int64*)ImageData;
Int64* dst64 = (Int64*)destinationBitmap.ImageData;
int srcHeight = (int)Height * (int)Width;
int dstHeight = (int)destinationBitmap.Height * (int)destinationBitmap.Width;
int maxLen = Math.Min(srcHeight, dstHeight);
int copyLength = maxLen - 8;
int i = 0;
while (copied < copyLength)
{
dst64[i] = src64[i];
i++;
copied += 8;
}
// Then copy single bytes until end of data
byte* src8 = (byte*)ImageData;
byte* dst8 = (byte*)destinationBitmap.ImageData;
i *= 8;
while (copied < ByteLength)
{
dst8[i] = src8[i];
i++;
copied++;
}
}
}
public BitmapSurface Clone()
{
lock (LockObject)
{
// Create new bitmap
var bitmap = new BitmapSurface(Width, Height, PixelFormat);
// Copy data into new bitmap
BitBlt(bitmap);
return bitmap;
}
}