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 sw_Polygon_hpp
16#define sw_Polygon_hpp
17
18#include "Vertex.hpp"
19
20namespace sw
21{
22 struct Polygon
23 {
24 Polygon(const float4 *P0, const float4 *P1, const float4 *P2)
25 {
26 P[0][0] = P0;
27 P[0][1] = P1;
28 P[0][2] = P2;
29
30 n = 3;
31 i = 0;
32 b = 0;
33 }
34
35 Polygon(const float4 *P, int n)
36 {
37 for(int i = 0; i < n; i++)
38 {
39 this->P[0][i] = &P[i];
40 }
41
42 this->n = n;
43 this->i = 0;
44 this->b = 0;
45 }
46
47 float4 B[16]; // Buffer for clipped vertices
48 const float4 *P[16][16]; // Pointers to clipped polygon's vertices
49
50 int n; // Number of vertices
51 int i; // Level of P to use
52 int b; // Next available new vertex
53 };
54}
55
56#endif // sw_Polygon_hpp
57