static int PaletteSize(byte[] dibBuffer)
{
BITMAPINFOHEADER infoHeader = BinaryStructConverter.FromByteArray <BITMAPINFOHEADER>(dibBuffer);
BITMAPCOREHEADER coreHeader = BinaryStructConverter.FromByteArray <BITMAPCOREHEADER>(dibBuffer);
if (infoHeader.biSize == System.Runtime.InteropServices.Marshal.SizeOf(infoHeader))
{
return(DIBNumColors(dibBuffer) * System.Runtime.InteropServices.Marshal.SizeOf(typeof(RGBQUAD)));
}
return(DIBNumColors(dibBuffer) * System.Runtime.InteropServices.Marshal.SizeOf(typeof(RGBTRIPLE)));
}
public void PopulateWithData(byte[] data, int StartAddress)
{
bmciHeader = new BITMAPCOREHEADER();
bmciHeader.PopulateWithData(data, StartAddress + 0);
bmciColors = new RGBTRIPLE();
bmciColors.PopulateWithData(data, StartAddress + 12);
}
static int DIBNumColors(byte[] dibBuffer)
{
BITMAPINFOHEADER infoHeader = BinaryStructConverter.FromByteArray <BITMAPINFOHEADER>(dibBuffer);
/* If this is a Windows-style DIB, the number of colors in the
* color table can be less than the number of bits per pixel
* allows for (i.e. lpbi->biClrUsed can be set to some value).
* If this is the case, return the appropriate value.
*/
if (infoHeader.biSize == System.Runtime.InteropServices.Marshal.SizeOf(infoHeader))
{
if (infoHeader.biClrUsed > 0)
{
return(infoHeader.biClrUsed);
}
}
/* Calculate the number of colors in the color table based on
* the number of bits per pixel for the DIB.
*/
int bitCount = 0;
if (infoHeader.biSize == System.Runtime.InteropServices.Marshal.SizeOf(infoHeader))
{
bitCount = infoHeader.biBitCount;
}
else
{
BITMAPCOREHEADER coreHeader = BinaryStructConverter.FromByteArray <BITMAPCOREHEADER>(dibBuffer);
bitCount = coreHeader.bcBitCount;
}
/* return number of colors based on bits per pixel */
switch (bitCount)
{
case 1:
return(2);
case 4:
return(16);
case 8:
return(256);
}
return(0);
}
