public void CompressColorsWithoutAlpha()
{
var colors = new Color[16];
colors[0] = Color.FromArgb(3, 59, 101);
colors[1] = Color.FromArgb(131, 154, 20);
colors[2] = Color.FromArgb(87, 192, 127);
colors[3] = Color.FromArgb(203, 148, 14);
colors[4] = Color.FromArgb(237, 62, 69);
colors[5] = Color.FromArgb(173, 159, 102);
colors[6] = Color.FromArgb(176, 199, 73);
colors[7] = Color.FromArgb(118, 87, 228);
colors[8] = Color.FromArgb(79, 169, 87);
colors[9] = Color.FromArgb(179, 238, 219);
colors[10] = Color.FromArgb(70, 207, 12);
colors[11] = Color.FromArgb(81, 243, 109);
colors[12] = Color.FromArgb(38, 79, 189);
colors[13] = Color.FromArgb(249, 229, 125);
colors[14] = Color.FromArgb(205, 237, 57);
colors[15] = Color.FromArgb(190, 158, 111);
var data = new BC1Format().Compress(colors);
// Assert against data hard-coded from a successful test
// run where the data was built using unit tested components.
Assert.AreEqual(0x7B, data[0]); // c0Low
Assert.AreEqual(0xB7, data[1]); // c0Hi
Assert.AreEqual(0xCC, data[2]); // c1Low
Assert.AreEqual(0x01, data[3]); // c1Hi
Assert.AreEqual(0xAD, data[4]); // indexes0
Assert.AreEqual(0xEB, data[5]); // indexes1
Assert.AreEqual(0x22, data[6]); // indexes2
Assert.AreEqual(0x83, data[7]); // indexes3
}
public void DecompressDataWithAlpha()
{
var bytes = new byte[BlockFormat.BC1ByteSize];
bytes[0] = 0xCC; // c0Low
bytes[1] = 0x01; // c0Hi
bytes[2] = 0x7B; // c1Low
bytes[3] = 0xB7; // c1Hi
bytes[4] = 0xAF; // indexes0
bytes[5] = 0xAF; // indexes1
bytes[6] = 0x6F; // indexes2
bytes[7] = 0x9F; // indexes3
var colors = new BC1Format().Decompress(bytes);
// Assert against data hard-coded from a successful test
// run where the data was built using unit tested components.
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[0]);
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[1]);
Assert.AreEqual(Color.FromArgb(255, 90, 150, 165), colors[2]);
Assert.AreEqual(Color.FromArgb(255, 90, 150, 165), colors[3]);
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[4]);
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[5]);
Assert.AreEqual(Color.FromArgb(255, 90, 150, 165), colors[6]);
Assert.AreEqual(Color.FromArgb(255, 90, 150, 165), colors[7]);
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[8]);
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[9]);
Assert.AreEqual(Color.FromArgb(255, 90, 150, 165), colors[10]);
Assert.AreEqual(Color.FromArgb(255, 181, 239, 222), colors[11]);
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[12]);
Assert.AreEqual(Color.FromArgb(0, 0, 0, 0), colors[13]);
Assert.AreEqual(Color.FromArgb(255, 181, 239, 222), colors[14]);
Assert.AreEqual(Color.FromArgb(255, 90, 150, 165), colors[15]);
}
public void DecompressionReturnsColorArrayOfCorrectSize()
{
var bytes = new byte[BlockFormat.BC1ByteSize];
var colors = new BC1Format().Decompress(bytes);
Assert.AreEqual(BlockFormat.TexelCount, colors.Length);
}
public void CompressionReturnsByteArrayOfCorrectSize()
{
var colors = new Color[BlockFormat.TexelCount];
var data = new BC1Format().Compress(colors);
Assert.AreEqual(BlockFormat.BC1ByteSize, data.Length);
}
public void CompressionOrdersReferenceColors()
{
var expectedMin = Color.FromArgb(10, 10, 10);
var expectedMax = Color.FromArgb(250, 250, 250);
var expectedColor0 = ColorUtility.To16Bit(expectedMax);
var expectedColor1 = ColorUtility.To16Bit(expectedMin);
var colors = ColorHelper.CreateRandomColorsBetween(expectedMin, expectedMax);
// Place expected min and max color in test input
colors[4] = expectedMin;
colors[10] = expectedMax;
var data = new BC1Format().Compress(colors);
var color0 = Color565.FromValue((ushort)((data[1] << 8) | data[0]));
var color1 = Color565.FromValue((ushort)((data[3] << 8) | data[2]));
Assert.Greater(color0.Value, color1.Value);
Assert.AreEqual(expectedColor0.Value, color0.Value);
Assert.AreEqual(expectedColor1.Value, color1.Value);
}
public void CompressionSwitchesReferenceColorOrderWhenAlpha()
{
var expectedMin = Color.FromArgb(10, 10, 10);
var expectedMax = Color.FromArgb(250, 250, 250);
var expectedColor0 = ColorUtility.To16Bit(expectedMin);
var expectedColor1 = ColorUtility.To16Bit(expectedMax);
var colors = ColorHelper.CreateRandomColorsBetween(expectedMin, expectedMax);
// Place expected min and max color in test input
colors[4] = expectedMin;
colors[10] = expectedMax;
// Add an arbitrary alpha value to some color
ColorHelper.AddAlpha(ref colors[5]);
var data = new BC1Format().Compress(colors);
var color0 = Color565.FromValue((ushort)((data[1] << 8) | data[0]));
var color1 = Color565.FromValue((ushort)((data[3] << 8) | data[2]));
Assert.LessOrEqual(color0.Value, color1.Value);
Assert.AreEqual(expectedColor0.Value, color0.Value);
Assert.AreEqual(expectedColor1.Value, color1.Value);
}
