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_PixelShader_hpp 16 #define sw_PixelShader_hpp 17 18 #include "Shader.hpp" 19 #include "Main/Config.hpp" 20 21 namespace sw 22 { 23 class PixelShader : public Shader 24 { 25 public: 26 explicit PixelShader(const PixelShader *ps = 0); 27 explicit PixelShader(const unsigned long *token); 28 29 virtual ~PixelShader(); 30 31 static int validate(const unsigned long *const token); // Returns number of instructions if valid 32 bool depthOverride() const; 33 bool containsKill() const; 34 bool containsCentroid() const; 35 bool usesDiffuse(int component) const; 36 bool usesSpecular(int component) const; 37 bool usesTexture(int coordinate, int component) const; 38 39 void setInput(int inputIdx, int nbComponents, const Semantic& semantic); 40 const Semantic& getInput(int inputIdx, int component) const; 41 42 void declareVPos() { vPosDeclared = true; } 43 void declareVFace() { vFaceDeclared = true; } 44 bool isVPosDeclared() const { return vPosDeclared; } 45 bool isVFaceDeclared() const { return vFaceDeclared; } 46 47 private: 48 void analyze(); 49 void analyzeZOverride(); 50 void analyzeKill(); 51 void analyzeInterpolants(); 52 53 Semantic input[MAX_FRAGMENT_INPUTS][4]; 54 55 bool vPosDeclared; 56 bool vFaceDeclared; 57 bool zOverride; 58 bool kill; 59 bool centroid; 60 }; 61 } 62 63 #endif // sw_PixelShader_hpp 64
