public void ConvertFromRgb(int inputBufferLength, int resultBufferLength, int seed)
{
var converter = JpegColorConverter.GetConverter(JpegColorSpace.RGB);
JpegColorConverter.ComponentValues values = CreateRandomValues(3, inputBufferLength, seed);
Vector4[] result = new Vector4[resultBufferLength];
converter.ConvertToRGBA(values, result);
for (int i = 0; i < resultBufferLength; i++)
{
float r = values.Component0[i];
float g = values.Component1[i];
float b = values.Component2[i];
Vector4 rgba = result[i];
var actual = new Rgb(rgba.X, rgba.Y, rgba.Z);
var expected = new Rgb(r / 255F, g / 255F, b / 255F);
Assert.True(actual.AlmostEquals(expected, Precision));
Assert.Equal(1, rgba.W);
}
}
public void ConvertFromYcck(int inputBufferLength, int resultBufferLength, int seed)
{
var v = new Vector4(0, 0, 0, 1F);
var scale = new Vector4(1 / 255F, 1 / 255F, 1 / 255F, 1F);
var converter = JpegColorConverter.GetConverter(JpegColorSpace.Ycck);
JpegColorConverter.ComponentValues values = CreateRandomValues(4, inputBufferLength, seed);
var result = new Vector4[resultBufferLength];
converter.ConvertToRGBA(values, result);
for (int i = 0; i < resultBufferLength; i++)
{
float y = values.Component0[i];
float cb = values.Component1[i] - 128F;
float cr = values.Component2[i] - 128F;
float k = values.Component3[i] / 255F;
v.X = (255F - (float)Math.Round(y + (1.402F * cr), MidpointRounding.AwayFromZero)) * k;
v.Y = (255F - (float)Math.Round(
y - (0.344136F * cb) - (0.714136F * cr),
MidpointRounding.AwayFromZero)) * k;
v.Z = (255F - (float)Math.Round(y + (1.772F * cb), MidpointRounding.AwayFromZero)) * k;
v.W = 1F;
v *= scale;
Vector4 rgba = result[i];
var actual = new Rgb(rgba.X, rgba.Y, rgba.Z);
var expected = new Rgb(v.X, v.Y, v.Z);
Assert.True(actual.AlmostEquals(expected, Precision));
Assert.Equal(1, rgba.W);
}
}
