public void SetPixel(int X, int Y, uint Value)
{
if ((X < 0) ||
(X >= m_Width) ||
(Y < 0) ||
(Y >= m_Height))
{
return;
}
if (m_ImageData.Empty())
{
return;
}
switch (BitsPerPixel)
{
case 1:
unsafe
{
int pitch = (Width + 7) / 8;
byte origValue = m_ImageData.ByteAt(Y * pitch + X / 8);
byte newValue = origValue;
if (Value != 0)
{
newValue = (byte)(origValue | (128 >> (X % 8)));
}
else
{
newValue = (byte)(origValue & (~(128 >> (X % 8))));
}
m_ImageData.SetU8At(Y * pitch + X / 8, newValue);
}
break;
case 4:
unsafe
{
int pitch = Width / 2;
byte origValue = m_ImageData.ByteAt(Y * pitch + X / 2);
byte newValue = 0;
if ((X % 2) == 0)
{
newValue = (byte)((origValue & 0x0f) | ((byte)Value << 4));
}
else
{
newValue = (byte)((origValue & 0xf0) | (byte)Value);
}
m_ImageData.SetU8At(Y * pitch + X / 2, newValue);
};
break;
case 8:
m_ImageData.SetU8At(Y * m_Width + X, (byte)Value);
break;
case 16:
m_ImageData.SetU16At(2 * (Y * m_Width + X),
(ushort)((((Value & 0xff0000) >> 19) << 10)
+ (((Value & 0x00ff00) >> 11) << 5)
+ (((Value & 0x0000ff) >> 3))));
break;
case 24:
m_ImageData.SetU8At(3 * (Y * m_Width + X) + 0, (byte)(Value & 0xff));
m_ImageData.SetU8At(3 * (Y * m_Width + X) + 1, (byte)((Value & 0xff00) >> 8));
m_ImageData.SetU8At(3 * (Y * m_Width + X) + 2, (byte)((Value & 0xff0000) >> 16));
break;
case 32:
m_ImageData.SetU32At(4 * (Y * m_Width + X), Value);
break;
default:
throw new NotSupportedException("Bitdepth " + BitsPerPixel + " not supported yet");
}
}
