/// <summary>
/// Loads a value from texture.
/// </summary>
/// <param name="texture"></param>
/// <param name="position"></param>
/// <param name="dst"></param>
public void Load([NotNull] Operand texture, [NotNull] Operand position, Operand offset, [NotNull] Operand dst)
{
// We first validate.
switch (texture.Format)
{
case PinFormat.Texture1D:
if (position.Format != PinFormat.Integerx2)
{
throw new ArgumentException("Position must be two-dimensional.");
}
break;
case PinFormat.Texture1DArray:
if (position.Format != PinFormat.Integerx3)
{
throw new ArgumentException("Position must be three-dimensional.");
}
break;
case PinFormat.Texture2D:
if (position.Format != PinFormat.Integerx3)
{
throw new ArgumentException("Position must be three-dimensional.");
}
break;
case PinFormat.Texture2DArray:
if (position.Format != PinFormat.Integerx4)
{
throw new ArgumentException("Position must be four-dimensional.");
}
break;
case PinFormat.Texture3D:
if (position.Format != PinFormat.Integerx4)
{
throw new ArgumentException("Position must be four-dimensional.");
}
break;
case PinFormat.BufferTexture:
if (position.Format != PinFormat.Integer)
{
throw new ArgumentException("Position must be one dimensional.");
}
break;
default:
throw new NotImplementedException();
}
// We also validate offset.
if (offset != null)
{
// TODO:
}
compiler.Load(texture.Name, position.Name,
offset != null ? offset.Name : -1, dst.Name);
}