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
21namespace 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