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1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //    http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef Vertex_hpp
16 #define Vertex_hpp
17 
18 #include "Color.hpp"
19 #include "Common/Types.hpp"
20 #include "Main/Config.hpp"
21 
22 namespace sw
23 {
24 	enum Out
25 	{
26 		// Default vertex output semantics
27 		Pos = 0,
28 		C0 = 1,   // Diffuse
29 		C1 = 2,   // Specular
30 		T0 = 3,
31 		T1 = 4,
32 		T2 = 5,
33 		T3 = 6,
34 		T4 = 7,
35 		T5 = 8,
36 		T6 = 9,
37 		T7 = 10,
38 		Fog = 11,    // x component
39 		Pts = Fog,   // y component
40 
41 		// Variable semantics
42 		V0 = 0,
43 		Vn_1 = MAX_VERTEX_OUTPUTS - 1,
44 
45 		Unused,
46 		VERTEX_OUTPUT_LAST = Unused,
47 	};
48 
49 	struct UVWQ
50 	{
51 		float u;
52 		float v;
53 		float w;
54 		float q;
55 
operator []sw::UVWQ56 		float &operator[](int i)
57 		{
58 			return (&u)[i];
59 		}
60 	};
61 
62 	ALIGN(16, struct Vertex
63 	{
64 		union
65 		{
66 			struct   // Fixed semantics
67 			{
68 				// Position
69 				float x;
70 				float y;
71 				float z;
72 				float w;
73 
74 				float4 C[2];   // Diffuse and specular color
75 
76 				UVWQ T[8];           // Texture coordinates
77 
78 				float f;             // Fog
79 				float pSize;         // Point size
80 			};
81 
82 			float4 v[MAX_VERTEX_OUTPUTS];   // Generic components using semantic declaration
83 		};
84 
85 		// Projected coordinates
86 		int X;
87 		int Y;
88 		float Z;
89 		float W;
90 
91 		int clipFlags;
92 		int padding[3];
93 	});
94 
95 	static_assert((sizeof(Vertex) & 0x0000000F) == 0, "Vertex size not a multiple of 16 bytes (alignment requirement)");
96 }
97 
98 #endif   // Vertex_hpp
99