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.BC1ByteSize];
bytes[4] = indexes0;
bytes[5] = indexes1;
bytes[6] = indexes2;
bytes[7] = indexes3;
var block = BC1BlockData.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 ConversionToBytesReturnsArrayOfCorrectSize()
{
var block = new BC1BlockData();
var buffer = block.ToBytes();
Assert.AreEqual(BlockFormat.BC1ByteSize, buffer.Length);
CollectionAssert.AreEqual(buffer, new byte[BlockFormat.BC1ByteSize]);
}
public void ConstructionFromBytesSetsColor1()
{
var color = new Color565Helper(40500);
var bytes = new byte[BlockFormat.BC1ByteSize];
bytes[2] = color.LowByte;
bytes[3] = color.HighByte;
var block = BC1BlockData.FromBytes(bytes);
Assert.AreEqual(color.Color.Value, block.Color1.Value);
}
public void WriteDataForSoleBlock()
{
var format = new Mock <IBlockCompressionFormat>();
format.Setup(f => f.BlockSize).Returns(BlockFormat.BC1ByteSize);
var bytes = Enumerable.Repeat((byte)200, BlockFormat.BC1ByteSize).ToArray();
var block = BC1BlockData.FromBytes(bytes);
var dds = DDSImage.CreateEmpty(BlockFormat.Dimension, BlockFormat.Dimension, format.Object);
dds.SetBlockData(new Point(0, 0), block.ToBytes());
CollectionAssert.AreEqual(dds.GetBuffer(), bytes);
}
public void ConversionToBytesSetsColor1()
{
var color = new Color565Helper(40500);
var block = new BC1BlockData();
block.Color1 = color.Color;
var buffer = block.ToBytes();
byte c1Low = buffer[2];
byte c1Hi = buffer[3];
Assert.AreEqual(color.LowByte, c1Low);
Assert.AreEqual(color.HighByte, c1Hi);
}
public void ConversionToBytesSetsColorIndexes()
{
byte expectedIndexes0 = "11 10 01 00".AsByte(); // d c b a
byte expectedIndexes1 = "00 11 10 01".AsByte(); // h g f e
byte expectedIndexes2 = "01 00 11 10".AsByte(); // l k j i
byte expectedIndexes3 = "10 01 00 11".AsByte(); // p o n m
var block = new BC1BlockData();
// texel value byte
block.ColorIndexes[0] = 0; // a(0,3) 00 indexes0
block.ColorIndexes[1] = 1; // b(1,3) 01
block.ColorIndexes[2] = 2; // c(2,3) 10
block.ColorIndexes[3] = 3; // d(3,3) 11
block.ColorIndexes[4] = 1; // e(0,2) 01 indexes1
block.ColorIndexes[5] = 2; // f(1,2) 10
block.ColorIndexes[6] = 3; // g(2,2) 11
block.ColorIndexes[7] = 0; // h(3,2) 00
block.ColorIndexes[8] = 2; // i(0,1) 10 indexes2
block.ColorIndexes[9] = 3; // j(1,1) 11
block.ColorIndexes[10] = 0; // k(2,1) 00
block.ColorIndexes[11] = 1; // l(3,1) 01
block.ColorIndexes[12] = 3; // m(0,0) 11 indexes3
block.ColorIndexes[13] = 0; // n(1,0) 00
block.ColorIndexes[14] = 1; // o(2,0) 01
block.ColorIndexes[15] = 2; // p(3,0) 10
var buffer = block.ToBytes();
byte indexes0 = buffer[4];
byte indexes1 = buffer[5];
byte indexes2 = buffer[6];
byte indexes3 = buffer[7];
Assert.AreEqual(expectedIndexes0, indexes0);
Assert.AreEqual(expectedIndexes1, indexes1);
Assert.AreEqual(expectedIndexes2, indexes2);
Assert.AreEqual(expectedIndexes3, indexes3);
}
public void WriteDataForMultipleBlocks()
{
const int numberOfBlocks = 4;
var format = new Mock <IBlockCompressionFormat>();
format.Setup(f => f.BlockSize).Returns(BlockFormat.BC1ByteSize);
var block1 = Enumerable.Repeat((byte)50, BlockFormat.BC1ByteSize).ToArray();
var block2 = Enumerable.Repeat((byte)100, BlockFormat.BC1ByteSize).ToArray();
var block3 = Enumerable.Repeat((byte)150, BlockFormat.BC1ByteSize).ToArray();
var block4 = Enumerable.Repeat((byte)200, BlockFormat.BC1ByteSize).ToArray();
var buffer = new byte[numberOfBlocks * BlockFormat.BC1ByteSize];
Array.Copy(block1, 0, buffer, 0, BlockFormat.BC1ByteSize);
Array.Copy(block2, 0, buffer, 8, BlockFormat.BC1ByteSize);
Array.Copy(block3, 0, buffer, 16, BlockFormat.BC1ByteSize);
Array.Copy(block4, 0, buffer, 24, BlockFormat.BC1ByteSize);
var data1 = BC1BlockData.FromBytes(block1).ToBytes();
var data2 = BC1BlockData.FromBytes(block2).ToBytes();
var data3 = BC1BlockData.FromBytes(block3).ToBytes();
var data4 = BC1BlockData.FromBytes(block4).ToBytes();
int widthAndHeight = 2 * BlockFormat.Dimension;
var ddsImage = DDSImage.CreateEmpty(widthAndHeight, widthAndHeight, format.Object);
ddsImage.SetBlockData(new Point(0, 0), data1);
ddsImage.SetBlockData(new Point(1, 0), data2);
ddsImage.SetBlockData(new Point(0, 1), data3);
ddsImage.SetBlockData(new Point(1, 1), data4);
CollectionAssert.AreEqual(ddsImage.GetBuffer(), buffer);
}
