private static void TransferARGBChannel(
Bitmap source,
Bitmap dest,
ChannelARGB sourceChannel,
ChannelARGB destChannel)
{
if (source.Size != dest.Size)
{
throw new ArgumentException();
}
Rectangle r = new Rectangle(Point.Empty, source.Size);
BitmapData bdSrc = source.LockBits(r, ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
BitmapData bdDst = dest.LockBits(r, ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
unsafe {
byte *bpSrc = (byte *)bdSrc.Scan0.ToPointer();
byte *bpDst = (byte *)bdDst.Scan0.ToPointer();
bpSrc += (int)sourceChannel;
bpDst += (int)destChannel;
for (int i = r.Height * r.Width; i > 0; i--)
{
*bpDst = *bpSrc;
bpSrc += 4;
bpDst += 4;
}
}
source.UnlockBits(bdSrc);
dest.UnlockBits(bdDst);
}
private void TransferChannel(Bitmap srcBitmap, ChannelARGB srcChannel, Bitmap dstBitmap, ChannelARGB dstChannel)
{
var srcData = srcBitmap.LockBits(new Rectangle(0, 0, srcBitmap.Width, srcBitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
try
{
var dstData = dstBitmap.LockBits(new Rectangle(0, 0, dstBitmap.Width, dstBitmap.Height), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
try
{
var ret = TransferChannel32(srcData.Scan0, (int)srcChannel, srcData.Stride,
dstData.Scan0, (int)dstChannel, dstData.Stride,
srcBitmap.Width, srcBitmap.Height);
if (ret != 0)
{
Log.Write(LogLevel.Error, "Error when transferring bitmap channel: {0}", ret);
}
}
finally
{
dstBitmap.UnlockBits(dstData);
}
}
finally
{
srcBitmap.UnlockBits(srcData);
}
}
public static void transferOneARGBChannelFromOneBitmapToAnother(Bitmap source, Bitmap dest, ChannelARGB sourceChannel, ChannelARGB destChannel )
{
if ( source.Size!=dest.Size )
throw new ArgumentException();
Rectangle r = new Rectangle( Point.Empty, source.Size );
BitmapData bdSrc = source.LockBits( r, ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb );
BitmapData bdDst = dest.LockBits( r, ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb );
unsafe
{
byte* bpSrc = (byte*)bdSrc.Scan0.ToPointer();
byte* bpDst = (byte*)bdDst.Scan0.ToPointer();
bpSrc += (int)sourceChannel;
bpDst += (int)destChannel;
for ( int i = r.Height * r.Width; i > 0; i-- )
{
*bpDst = *bpSrc;
bpSrc += 4;
bpDst += 4;
}
}
source.UnlockBits( bdSrc );
dest.UnlockBits( bdDst );
}