des.util.data.attrib source code

1 module des.util.data.attrib;
2 
3 import des.util.data.type;
4 
5 /// data array description
6 interface Attribute
7 {
8     const @property
9     {
10         string desc(); ///
11         ref const(ElemInfo) info(); ///
12         protected size_t manual_stride(); ///
13         size_t offset(); ///
14         const(void[]) data(); ///
15 
16         ///
17         final size_t stride()
18         { return manual_stride ? manual_stride : info.bpe; }
19 
20         ///
21         final size_t count()
22         { return ( data.length - offset ) / stride; }
23     }
24 }
25 
26 /++
27     simple realisation of Attribute interface
28  +/
29 class SimpleAttribute : Attribute
30 {
31 protected:
32     string _desc; ///
33     ElemInfo _info; ///
34     void[] _data; ///
35 
36 public:
37 
38     ///
39     this( string Desc, ElemInfo Info, in void[] Data )
40     {
41         _desc = Desc;
42         _info = Info;
43         _data = Data.dup;
44     }
45 
46     ///
47     this(T)( string Desc, in T[] Data )
48     {
49         _desc = Desc;
50         _info = ElemInfo.fromType!T;
51         _data = Data.dup;
52     }
53 
54     const @property
55     {
56         string desc() { return _desc; }
57         ref const(ElemInfo) info() { return _info; }
58         protected size_t manual_stride() { return 0; }
59         size_t offset() { return 0; }
60         const(void[]) data() { return _data; }
61     }
62 }
63 
64 ///
65 unittest
66 {
67     import des.math.linear;
68     vec2[] data = [ vec2(1,2), vec2(3,4) ];
69     auto a = new SimpleAttribute( "test", data );
70 
71     assert( a.stride == vec2.sizeof );
72     assert( a.info.type == DataType.FLOAT );
73     assert( a.info.comp == 2 );
74     assert( a.data == cast(void[])data );
75 }