public void EncodeFourBlocksPureBlackRGBThenDecodeIt()
{
// Arrange
const int width = 8; // One block is 4x4, so 8x8 is 4 blocks
const int height = 8;
const int channelsPerPixel = 3;
byte[] blackRGB = new byte[] { 0, 0, 0 };
byte[,,] pixels = new byte[width, height, channelsPerPixel] {
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
{ { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } },
};
TempByteImageFormat image = new TempByteImageFormat(pixels);
// Act
byte[] encodedBytes = PvrtcCompress.EncodeRgb4Bpp(image);
TempByteImageFormat decoded = PvrtcDecompress.DecodeRgb4Bpp(encodedBytes, width);
byte[] firstPixel = decoded.GetPixelChannels(0, 0);
// Assert
Assert.AreEqual(32, encodedBytes.Length);
Assert.AreEqual(width, decoded.GetWidth());
Assert.AreEqual(height, decoded.GetHeight());
Assert.AreEqual(channelsPerPixel, decoded.GetChannelsPerPixel());
CollectionAssert.AreEqual(blackRGB, firstPixel);
}
public void EncodeOneBlockPureWhiteRGBAThenDecodeIt()
{
// Arrange
const int width = 4; // One block is 4x4
const int height = 4;
const int channelsPerPixel = 4;
byte[] whiteRGBA = new byte[] { 255, 255, 255, 255 };
byte[,,] pixels = new byte[width, height, channelsPerPixel] {
{ { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 } },
{ { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 } },
{ { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 } },
{ { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 }, { 255, 255, 255, 255 } },
};
TempByteImageFormat image = new TempByteImageFormat(pixels);
// Act
byte[] encodedBytes = PvrtcCompress.EncodeRgba4Bpp(image);
TempByteImageFormat decoded = PvrtcDecompress.DecodeRgba4Bpp(encodedBytes, width);
byte[] firstPixel = decoded.GetPixelChannels(0, 0);
// Assert
Assert.AreEqual(8, encodedBytes.Length);
Assert.AreEqual(width, decoded.GetWidth());
Assert.AreEqual(height, decoded.GetHeight());
Assert.AreEqual(channelsPerPixel, decoded.GetChannelsPerPixel());
CollectionAssert.AreEqual(whiteRGBA, firstPixel);
}
public void IndexingTest()
{
// Arrange
FileStream pngStream = new FileStream("half.png", FileMode.Open, FileAccess.Read);
int[] indexes = new int[] { 0, 1, 12, 37, 56, 132, 200 };
// Act
var image = new Bitmap(pngStream);
TempByteImageFormat test3d = new TempByteImageFormat(ReadTo3DBytes(image));
TempByteImageFormat test1d = new TempByteImageFormat(ReadTo1DBytes(image), image.Width, image.Height, 3);
// Assert
for (int x = 0; x < indexes.Length; x++)
{
for (int y = 0; y < indexes.Length; y++)
{
byte[] pixel3d = test3d.GetPixelChannels(x, y);
byte[] pixel1d = test1d.GetPixelChannels(x, y);
CollectionAssert.AreEqual(pixel3d, pixel1d, $"Pixels at {x} x {y} should be equal");
}
}
}
public void DecodeRGBTextureFromByteArray()
{
// Arrange
byte[] input = new byte[8] {
0, 0, 0, 0, 254, 255, 255, 255
};
int width = 4;
byte[] whiteRGB = new byte[] { 255, 255, 255 };
// Act
TempByteImageFormat temp = PvrtcDecompress.DecodeRgb4Bpp(input, width);
byte[] firstPixel = temp.GetPixelChannels(0, 0);
// Assert
CollectionAssert.AreEqual(whiteRGB, firstPixel);
}
public void LoadTest1d()
{
// Arrange
FileStream pngStream = new FileStream("half.png", FileMode.Open, FileAccess.Read);
// Act
var image = new Bitmap(pngStream);
Color firstColor = image.GetPixel(0, 0);
TempByteImageFormat test = new TempByteImageFormat(ReadTo1DBytes(image), image.Width, image.Height, 3);
byte[] firstPixel = test.GetPixelChannels(0, 0);
// Assert
Assert.AreEqual(firstColor.R, firstPixel[0]);
Assert.AreEqual(firstColor.G, firstPixel[1]);
Assert.AreEqual(firstColor.B, firstPixel[2]);
}
public void CheckThat1dCopyWorks()
{
// Arrange
FileStream pngStream = new FileStream("half.png", FileMode.Open, FileAccess.Read);
// Act
var image = new Bitmap(pngStream);
byte[] bytes1d = ReadTo1DBytes(image);
TempByteImageFormat test1d_1 = new TempByteImageFormat(bytes1d, image.Width, image.Height, 3, createCopy: false);
TempByteImageFormat test1d_2 = new TempByteImageFormat(bytes1d, image.Width, image.Height, 3, createCopy: true);
bytes1d[0] = 0;
byte[] firstPixel1 = test1d_1.GetPixelChannels(0, 0);
byte[] firstPixel2 = test1d_2.GetPixelChannels(0, 0);
// Assert
Assert.AreEqual(0, firstPixel1[0]);
Assert.AreNotEqual(0, firstPixel2[0]);
}