1d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// 3d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// Licensed under the Apache License, Version 2.0 (the "License"); 4d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// you may not use this file except in compliance with the License. 5d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// You may obtain a copy of the License at 6d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// 7d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// http://www.apache.org/licenses/LICENSE-2.0 8d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// 9d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// Unless required by applicable law or agreed to in writing, software 10d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// distributed under the License is distributed on an "AS IS" BASIS, 11d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// See the License for the specific language governing permissions and 13d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens// limitations under the License. 14d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 15d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens#ifndef sw_Polygon_hpp 16d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens#define sw_Polygon_hpp 17d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 18d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens#include "Vertex.hpp" 19d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 20d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capensnamespace sw 21d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens{ 22d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens struct Polygon 23d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens { 24d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens Polygon(const float4 *P0, const float4 *P1, const float4 *P2) 25d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens { 26d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens P[0][0] = P0; 27d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens P[0][1] = P1; 28d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens P[0][2] = P2; 29d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 30d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens n = 3; 31d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens i = 0; 32ce065365a9793bb7f1d39ac98ae0e08d0df58d22Nicolas Capens b = 0; 33d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens } 34d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 35d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens Polygon(const float4 *P, int n) 36d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens { 37d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens for(int i = 0; i < n; i++) 38d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens { 39d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens this->P[0][i] = &P[i]; 40d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens } 41d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 42d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens this->n = n; 43d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens this->i = 0; 44ce065365a9793bb7f1d39ac98ae0e08d0df58d22Nicolas Capens this->b = 0; 45d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens } 46d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 47d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens float4 B[16]; // Buffer for clipped vertices 48d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens const float4 *P[16][16]; // Pointers to clipped polygon's vertices 49d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 50ce065365a9793bb7f1d39ac98ae0e08d0df58d22Nicolas Capens int n; // Number of vertices 51ce065365a9793bb7f1d39ac98ae0e08d0df58d22Nicolas Capens int i; // Level of P to use 52ce065365a9793bb7f1d39ac98ae0e08d0df58d22Nicolas Capens int b; // Next available new vertex 53d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens }; 54d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens} 55d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens 56d999309b36cb3dceadd38217b322f0e96a06b202Nicolas Capens#endif // sw_Polygon_hpp 57