public static void AddAlpha(Bitmap srcBmp,ImageData alpha)
{
if (alpha.Width != srcBmp.Width || alpha.Height != srcBmp.Height)
{
return;
}
BitmapData srcData = srcBmp.LockBits(new Rectangle(0, 0, srcBmp.Width, srcBmp.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
unsafe
{
byte* src = (byte*)srcData.Scan0;
int srcOffset = srcData.Stride - srcBmp.Width * 4;
for (int y = 0; y < srcBmp.Height; ++y)
{
for (int x = 0; x < srcBmp.Width; ++x)
{
*(src+3) = alpha.Get( x ,y );
src += 4;
}
src += srcOffset;
}
}
srcBmp.UnlockBits(srcData);
}
public unsafe ImageData Clone()
{
ImageData clone = new ImageData(Width,Height);
memcpy((byte*)clone.Buf, (byte*)Buf, m_width * m_height);
return clone;
}