private static short FloatToNormalizedShort(float value)
{
Assure.BetweenOrEqualTo(value, -1f, 1f, "Normalized float value should be between -1f and 1f!");
return(value > 0f
? (short)(value * (float)System.Int16.MaxValue)
: (short)(Math.Abs(value) * (float)System.Int16.MinValue));
}
private static sbyte FloatToNormalizedSByte(float value)
{
Assure.BetweenOrEqualTo(value, -1f, 1f, "Normalized float value should be between -1f and 1f!");
return(value > 0f
? (sbyte)(value * (float)SByte.MaxValue)
: (sbyte)(Math.Abs(value) * (float)SByte.MinValue));
}
/// <summary>
/// Create a new Texture Sampler object.
/// </summary>
/// <param name="filterType">The filter method to use.</param>
/// <param name="wrapMode">The wrap mode to use.</param>
/// <param name="maxAnisotropy">If <paramref name="filterType"/> is set to <see cref="TextureFilterType.Anisotropic"/>,
/// this field is used to determine the maximum filter level for anisotropic filtering.</param>
/// <param name="borderColor">If <paramref name="wrapMode"/> is set to <see cref="TextureWrapMode.Border"/>,
/// this field is used to determine the out-of-bounds colour around the border of mapped textures.
/// The range for each element in the <see cref="TexelFormat.RGB32Float"/> structure is <c>0f</c> to <c>1f</c>.</param>
public TextureSampler(TextureFilterType filterType, TextureWrapMode wrapMode,
AnisotropicFilteringLevel maxAnisotropy, TexelFormat.RGB32Float borderColor = new TexelFormat.RGB32Float())
: base(CreateTextureSampler(filterType, wrapMode, maxAnisotropy, borderColor), ResourceUsage.Immutable, SSO_SIZE_BYTES)
{
FilterType = filterType;
WrapMode = wrapMode;
MaxAnisotropy = maxAnisotropy;
BorderColor = borderColor;
Assure.BetweenOrEqualTo(borderColor.R, 0f, 1f, "Each element in the given border colour must lie between 0f and 1f.");
Assure.BetweenOrEqualTo(borderColor.G, 0f, 1f, "Each element in the given border colour must lie between 0f and 1f.");
Assure.BetweenOrEqualTo(borderColor.B, 0f, 1f, "Each element in the given border colour must lie between 0f and 1f.");
}
private static ushort FloatToNormalizedUShort(float value)
{
Assure.BetweenOrEqualTo(value, 0f, 1f, "Normalized float value should be between 0f and 1f!");
return((ushort)(value * (float)System.UInt16.MaxValue));
}
private static byte FloatToNormalizedByte(float value)
{
Assure.BetweenOrEqualTo(value, 0f, 1f, "Normalized float value should be between 0f and 1f!");
return((byte)(value * (float)Byte.MaxValue));
}