//specific format for BFF header
private static byte[] SetHeader(CGeneric.Compression textureType, byte greenAlphaIndex, byte compressedValue, byte[] displayedWidth, byte[] pixelWidth, byte[] displayHeight, byte[] bffName, byte[] colorCount)
{
//fixedsize = 36 + bffName + 1 if bffName size is not pair + 4 for palette color count
byte[] headerBFF2 = new Byte[36 + bffName.Length + bffName.Length % 2 + colorCount.Length];
headerBFF2[8] = 0x8;
//write "BFF2"
for (int i = 0; i < CGeneric.patternBFF2.Length; i++)
{
headerBFF2[12 + i] = CGeneric.patternBFF2[i];
}
//decompose the next two bytes in nibbles
//grab the nibbles of alpha color
List <byte> alphaColor = CGeneric.ByteToNibble(greenAlphaIndex);
//write two nibbles for the both bytes..
headerBFF2[17] = CGeneric.NibbleToByte(2, alphaColor[0]);
headerBFF2[18] = CGeneric.NibbleToByte(alphaColor[1], compressedValue);
//write texture type
headerBFF2[19] = (byte)textureType;
//write displayed width
for (int i = 0; i < displayedWidth.Length; i++)
{
headerBFF2[20 + i] = displayedWidth[i];
}
//write pixel width
for (int i = 0; i < pixelWidth.Length; i++)
{
headerBFF2[22 + i] = pixelWidth[i];
}
//write display height
for (int i = 0; i < displayHeight.Length; i++)
{
headerBFF2[26 + i] = displayHeight[i];
}
//prepare instruction length (depending of the pixelWidth value)
double instructionLengthValue = CGeneric.ConvertByteArrayToInt(pixelWidth);
switch (textureType)
{
case CGeneric.Compression.greyscale: instructionLengthValue *= 2; break;
case CGeneric.Compression.max16Colors: instructionLengthValue /= 2; break;
case CGeneric.Compression.trueColor16Bits: instructionLengthValue *= 2; break;
case CGeneric.Compression.trueColor32Bits: instructionLengthValue *= 4; break;
}
byte[] instructLength = CGeneric.ConvertIntToByteArray((int)Math.Floor(instructionLengthValue));
//write instruction length
for (int i = 0; i < instructLength.Length; i++)
{
headerBFF2[28 + i] = instructLength[i];
}
//length of file name
if (bffName.Length % 2 == 0)
{
headerBFF2[35] = (byte)bffName.Length;
}
else
{
headerBFF2[35] = (byte)(bffName.Length + 1);
}
//write bff name
for (int i = 0; i < bffName.Length; i++)
{
headerBFF2[36 + i] = bffName[i];
}
for (int i = 0; i < colorCount.Length; i++)
{
headerBFF2[36 + bffName.Length + bffName.Length % 2 + i] = colorCount[i];
}
return(headerBFF2);
}
