public BinaryPixelBitmap(UnsafeBitmap bm, int xStart, int yStart, int xWidth, int yHeight, BinPixelConvertType convertType, Color?refColor)
{
// If refColor==null then sets convertType to ColorIsOne and refColor to black
// Otherwise if convertType is ColorIsOne then if color matches refColor it is a 1 and all others are 0
// If convertType is ColorIsZero then if color matches refColor then it is a 0 and all others are 1
height = yHeight;
columns = new int[xWidth];
int temp;
if (refColor == null)
{
convertType = BinPixelConvertType.ColorIsOne;
refColor = Color.FromArgb(0, 0, 0); // Black
}
if (convertType == BinPixelConvertType.ColorIsOne)
{
for (int x = xStart; x < xStart + xWidth; x++)
{
temp = 0;
for (int y = yStart; y < (yStart + yHeight) && y < (yStart + 16); y++)
{
if (bm.GetPixel(x, y) == refColor)
{
temp |= 1 << (y - yStart);
}
}
columns[x - xStart] = temp;
}
}
else
{
for (int x = xStart; x < xStart + xWidth; x++)
{
temp = 0;
for (int y = yStart; y < (yStart + yHeight) && y < (yStart + 16); y++)
{
if (bm.GetPixel(x, y) != refColor)
{
temp |= 1 << (y - yStart);
}
}
columns[x - xStart] = temp;
}
}
}
public int[] CloneAsBin(Rectangle rect, BinPixelConvertType convertType, Color?refColor)
{
int yHeight = rect.Height;
if (yHeight > 32)
{
return(null);
}
int xWidth = rect.Width;
int xStart = rect.Left;
int yStart = rect.Top;
// If refColor==null then sets convertType to ColorIsOne and refColor to black
// Otherwise if convertType is ColorIsOne then if color matches refColor it is a 1 and all others are 0
// If convertType is ColorIsZero then if color matches refColor then it is a 0 and all others are 1
int[] columns = new int[xWidth];
if (refColor == null)
{
convertType = BinPixelConvertType.ColorIsOne;
refColor = Color.FromArgb(0, 0, 0); // Black
}
PixelData refColorPD;
refColorPD.red = refColor.Value.R;
refColorPD.blue = refColor.Value.B;
refColorPD.green = refColor.Value.G;
byte *pBaseTemp;
if (convertType == BinPixelConvertType.ColorIsOne)
{
for (int y = 0; y < yHeight; y++)
{
pBaseTemp = pBase + (y + yStart) * width + xStart * bytesPerPixel;
for (int x = 0; x < xWidth; x++)
{
if (*pBaseTemp == refColorPD.blue && *(pBaseTemp + 1) == refColorPD.green && *(pBaseTemp + 2) == refColorPD.red)
{
columns[x] |= 1 << y;
}
pBaseTemp += bytesPerPixel;
}
}
}
else
{
for (int y = 0; y < yHeight; y++)
{
pBaseTemp = pBase + (y + yStart) * width + xStart * bytesPerPixel;
for (int x = 0; x < xWidth; x++)
{
if (*pBaseTemp != refColorPD.blue && *(pBaseTemp + 1) != refColorPD.green && *(pBaseTemp + 2) != refColorPD.red)
{
columns[x] |= 1 << y;
}
pBaseTemp += bytesPerPixel;
}
}
}
return(columns);
}
