public static ushort[,] GetPixelArray(Bitmap b, GetPixelMode mode)
{
bool stretch = mode != GetPixelMode.Raw8Bit;
uint maxval = 256;
if (stretch)
{
if (mode == GetPixelMode.StretchTo12Bit)
maxval = 4096;
else if (mode == GetPixelMode.StretchTo16Bit)
maxval = ushort.MaxValue;
}
Random rnd = new Random((int)DateTime.Now.Ticks);
ushort[,] rv = new ushort[b.Width, b.Height];
// GDI+ still lies to us - the return format is BGR, NOT RGB.
BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
try
{
int stride = bmData.Stride;
System.IntPtr Scan0 = bmData.Scan0;
unsafe
{
byte* p = (byte*)(void*)Scan0;
int nOffset = stride - b.Width * 3;
for (int y = 0; y < b.Height; ++y)
{
for (int x = 0; x < b.Width; ++x)
{
ushort red = p[2];
if (stretch)
{
uint stretchedVal = Math.Max(0, Math.Min(maxval, (uint)(red * maxval / 256.0 + (2 * (rnd.NextDouble() - 0.5) * maxval / 256.0))));
red = (ushort) stretchedVal;
}
rv[x, y] = red;
p += 3;
}
p += nOffset;
}
}
}
finally
{
b.UnlockBits(bmData);
}
return rv;
}
public static ushort[,] GetPixelArray(Bitmap b, GetPixelMode mode)
{
bool stretch = mode != GetPixelMode.Raw8Bit;
uint maxval = 256;
if (stretch)
{
if (mode == GetPixelMode.StretchTo12Bit)
{
maxval = 4096;
}
else if (mode == GetPixelMode.StretchTo16Bit)
{
maxval = ushort.MaxValue;
}
}
Random rnd = new Random((int)DateTime.Now.Ticks);
ushort[,] rv = new ushort[b.Width, b.Height];
// GDI+ still lies to us - the return format is BGR, NOT RGB.
BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
try
{
int stride = bmData.Stride;
System.IntPtr Scan0 = bmData.Scan0;
unsafe
{
byte *p = (byte *)(void *)Scan0;
int nOffset = stride - b.Width * 3;
for (int y = 0; y < b.Height; ++y)
{
for (int x = 0; x < b.Width; ++x)
{
ushort red = p[2];
if (stretch)
{
uint stretchedVal = Math.Max(0, Math.Min(maxval, (uint)(red * maxval / 256.0 + (2 * (rnd.NextDouble() - 0.5) * maxval / 256.0))));
red = (ushort)stretchedVal;
}
rv[x, y] = red;
p += 3;
}
p += nOffset;
}
}
}
finally
{
b.UnlockBits(bmData);
}
return(rv);
}
