// Test image: Input\Png\Bike.png
private static void RunColorSpaceTransformTestWithBikeImage()
{
// arrange
uint[] expectedData =
{
4278714368, 4278192876, 4278198304, 4278198304, 4278190304, 4278190080, 4278190080, 4278198272,
4278197760, 4278198816, 4278197794, 4278197774, 4278190080, 4278190080, 4278198816, 4278197281,
4278197280, 4278197792, 4278200353, 4278191343, 4278190304, 4294713873, 4278198784, 4294844416,
4278201578, 4278200044, 4278191343, 4278190288, 4294705200, 4294717139, 4278203628, 4278201064,
4278201586, 4278197792, 4279240909
};
// Convert image pixels to bgra array.
byte[] imgBytes = File.ReadAllBytes(TestImageFullPath(TestImages.Webp.Lossy.BikeSmall));
using var image = Image.Load <Rgba32>(imgBytes, new WebpDecoder());
uint[] bgra = ToBgra(image);
int colorTransformBits = 4;
int transformWidth = LosslessUtils.SubSampleSize(image.Width, colorTransformBits);
int transformHeight = LosslessUtils.SubSampleSize(image.Height, colorTransformBits);
uint[] transformData = new uint[transformWidth * transformHeight];
int[] scratch = new int[256];
// act
PredictorEncoder.ColorSpaceTransform(image.Width, image.Height, colorTransformBits, 75, bgra, transformData, scratch);
// assert
Assert.Equal(expectedData, transformData);
}
// Test image: Input\Webp\peak.png
private static void RunColorSpaceTransformTestWithPeakImage()
{
// arrange
uint[] expectedData =
{
4278191104, 4278191104, 4278191104, 4278191104, 4278191104, 4278191104, 4278191104, 4294577152,
4294707200, 4294707200, 4294707200, 4294707200, 4294837248, 4294837248, 4293926912, 4294316544,
4278191104, 4278191104, 4294837248, 4294837248, 4280287232, 4280350720, 4294447104, 4294707200,
4294838272, 4278516736, 4294837248, 4294837248, 4278516736, 4294707200, 4279298048, 4294837248,
4294837248, 4294837248, 4294837248, 4280287232, 4280287232, 4292670464, 4279633408, 4294838272,
4294837248, 4278516736, 4278516736, 4278516736, 4278516736, 4278516736, 4278778880, 4278193152,
4278191104, 4280287232, 4280287232, 4280287232, 4280287232, 4293971968, 4280612864, 4292802560,
4294837760, 4278516736, 4278516736, 4294837760, 4294707712, 4278516736, 4294837248, 4278193152,
4280287232, 4278984704, 4280287232, 4278243328, 4280287232, 4278244352, 4280287232, 4280025088,
4280025088, 4294837760, 4278192128, 4294838784, 4294837760, 4294707712, 4278778880, 4278324224,
4280287232, 4280287232, 4278202368, 4279115776, 4280287232, 4278243328, 4280287232, 4280287232,
4280025088, 4280287232, 4278192128, 4294838272, 4294838272, 4294837760, 4278190592, 4278778880,
4280875008, 4280287232, 4279896576, 4281075712, 4281075712, 4280287232, 4280287232, 4280287232,
4280287232, 4280287232, 4278190592, 4294709248, 4278516736, 4278516736, 4278584832, 4278909440,
4280287232, 4280287232, 4294367744, 4294621184, 4279115776, 4280287232, 4280287232, 4280351744,
4280287232, 4280287232, 4280287232, 4278513664, 4278516736, 4278716416, 4278584832, 4280291328,
4293062144, 4280287232, 4280287232, 4280287232, 4294456320, 4280291328, 4280287232, 4280287232,
4280287232, 4280287232, 4280287232, 4280287232, 4278513152, 4278716416, 4278584832, 4280291328,
4278198272, 4278198272, 4278589952, 4278198272, 4278198272, 4280287232, 4278765568, 4280287232,
4280287232, 4280287232, 4280287232, 4294712832, 4278513152, 4278716640, 4279300608, 4278584832,
4280156672, 4279373312, 4278589952, 4279373312, 4278328832, 4278328832, 4278328832, 4279634432,
4280287232, 4280287232, 4280287232, 4280287232, 4278457344, 4280483328, 4278584832, 4278385664,
4279634432, 4279373312, 4279634432, 4280287232, 4280287232, 4280156672, 4278589952, 4278328832,
4278198272, 4280156672, 4280483328, 4294363648, 4280287232, 4278376448, 4280287232, 4278647808,
4280287232, 4280287232, 4279373312, 4280287232, 4280287232, 4280156672, 4280287232, 4278198272,
4278198272, 4280156672, 4280287232, 4280287232, 4293669888, 4278765568, 4278765568, 4280287232,
4280287232, 4280287232, 4279634432, 4279634432, 4280287232, 4280287232, 4280287232, 4280287232,
4280287232, 4280287232, 4280287232, 4280287232, 4279373312, 4279764992, 4293539328, 4279896576,
4280287232, 4280287232, 4280287232, 4279634432, 4278198272, 4279634432, 4280287232, 4280287232,
4280287232, 4280287232, 4280287232, 4280287232, 4280287232, 4279503872, 4279503872, 4280288256,
4280287232, 4280287232, 4280287232, 4280287232, 4280287232, 4280287232, 4280287232, 4280287232,
4280287232, 4280287232, 4280287232, 4280287232, 4280287232, 4280287232, 4280287232, 4280287232
};
// Convert image pixels to bgra array.
byte[] imgBytes = File.ReadAllBytes(TestImageFullPath(TestImages.Webp.Peak));
using var image = Image.Load <Rgba32>(imgBytes);
uint[] bgra = ToBgra(image);
int colorTransformBits = 3;
int transformWidth = LosslessUtils.SubSampleSize(image.Width, colorTransformBits);
int transformHeight = LosslessUtils.SubSampleSize(image.Height, colorTransformBits);
uint[] transformData = new uint[transformWidth * transformHeight];
int[] scratch = new int[256];
// act
PredictorEncoder.ColorSpaceTransform(image.Width, image.Height, colorTransformBits, 75, bgra, transformData, scratch);
// assert
Assert.Equal(expectedData, transformData);
}
