public void ConstructionFromBytesSetsColorIndexes()
{
byte indexes0 = "11 10 01 00".AsByte(); // d c b a
byte indexes1 = "00 11 10 01".AsByte(); // h g f e
byte indexes2 = "01 00 11 10".AsByte(); // l k j i
byte indexes3 = "10 01 00 11".AsByte(); // p o n m
var bytes = new byte[BlockFormat.BC3ByteSize];
bytes[12] = indexes0;
bytes[13] = indexes1;
bytes[14] = indexes2;
bytes[15] = indexes3;
var block = BC3BlockData.FromBytes(bytes);
Assert.AreEqual(0, block.ColorIndexes[0]); // a 00
Assert.AreEqual(1, block.ColorIndexes[1]); // b 01
Assert.AreEqual(2, block.ColorIndexes[2]); // c 10
Assert.AreEqual(3, block.ColorIndexes[3]); // d 11
Assert.AreEqual(1, block.ColorIndexes[4]); // e 01
Assert.AreEqual(2, block.ColorIndexes[5]); // f 10
Assert.AreEqual(3, block.ColorIndexes[6]); // g 11
Assert.AreEqual(0, block.ColorIndexes[7]); // h 00
Assert.AreEqual(2, block.ColorIndexes[8]); // i 10
Assert.AreEqual(3, block.ColorIndexes[9]); // j 11
Assert.AreEqual(0, block.ColorIndexes[10]); // k 00
Assert.AreEqual(1, block.ColorIndexes[11]); // l 01
Assert.AreEqual(3, block.ColorIndexes[12]); // m 11
Assert.AreEqual(0, block.ColorIndexes[13]); // n 00
Assert.AreEqual(1, block.ColorIndexes[14]); // o 01
Assert.AreEqual(2, block.ColorIndexes[15]); // p 10
}
public void ConstructionFromBytesSetsAlpha1()
{
const byte alphaValue = 215;
var bytes = new byte[BlockFormat.BC3ByteSize];
bytes[1] = alphaValue;
var block = BC3BlockData.FromBytes(bytes);
Assert.AreEqual(alphaValue, block.Alpha1);
}
public void ConstructionFromBytesSetsColor1()
{
var color = new Color565Helper(40500);
var bytes = new byte[BlockFormat.BC2ByteSize];
bytes[10] = color.LowByte;
bytes[11] = color.HighByte;
var block = BC3BlockData.FromBytes(bytes);
Assert.AreEqual(color.Color.Value, block.Color1.Value);
}
public void ConstructionFromBytesSetsAlphaIndexes()
{
// Increment until max value, then decrement
byte alphas0 = "10 001 000".AsByte(); // c b a
byte alphas1 = "1 100 011 0".AsByte(); // f e d c
byte alphas2 = "111 110 10".AsByte(); // h g f
byte alphas3 = "01 110 111".AsByte(); // k j i
byte alphas4 = "0 011 100 1".AsByte(); // n m l k
byte alphas5 = "000 001 01".AsByte(); // p o n
var bytes = new byte[BlockFormat.BC3ByteSize];
bytes[2] = alphas2;
bytes[3] = alphas1;
bytes[4] = alphas0;
bytes[5] = alphas5;
bytes[6] = alphas4;
bytes[7] = alphas3;
var block = BC3BlockData.FromBytes(bytes);
Assert.AreEqual(0, block.AlphaIndexes[0]); // a 000
Assert.AreEqual(1, block.AlphaIndexes[1]); // b 001
Assert.AreEqual(2, block.AlphaIndexes[2]); // c 010
Assert.AreEqual(3, block.AlphaIndexes[3]); // d 011
Assert.AreEqual(4, block.AlphaIndexes[4]); // e 100
Assert.AreEqual(5, block.AlphaIndexes[5]); // f 101
Assert.AreEqual(6, block.AlphaIndexes[6]); // g 110
Assert.AreEqual(7, block.AlphaIndexes[7]); // h 111
Assert.AreEqual(7, block.AlphaIndexes[8]); // i 111
Assert.AreEqual(6, block.AlphaIndexes[9]); // j 110
Assert.AreEqual(5, block.AlphaIndexes[10]); // k 101
Assert.AreEqual(4, block.AlphaIndexes[11]); // l 100
Assert.AreEqual(3, block.AlphaIndexes[12]); // m 011
Assert.AreEqual(2, block.AlphaIndexes[13]); // n 010
Assert.AreEqual(1, block.AlphaIndexes[14]); // o 001
Assert.AreEqual(0, block.AlphaIndexes[15]); // p 000
}
