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_QuadRasterizer_hpp
16#define sw_QuadRasterizer_hpp
17
18#include "Rasterizer.hpp"
19#include "Pipeline/ShaderCore.hpp"
20#include "Pipeline/SpirvShader.hpp"
21#include "System/Types.hpp"
22
23namespace sw
24{
25 class QuadRasterizer : public Rasterizer
26 {
27 public:
28 QuadRasterizer(const PixelProcessor::State &state, SpirvShader const *spirvShader);
29 virtual ~QuadRasterizer();
30
31 void generate();
32
33 protected:
34 Pointer<Byte> constants;
35
36 Float4 Dz[4];
37 Float4 Dw;
38 Float4 Dv[MAX_INTERFACE_COMPONENTS];
39 Float4 Df;
40
41 UInt occlusion;
42
43 virtual void quad(Pointer<Byte> cBuffer[4], Pointer<Byte> &zBuffer, Pointer<Byte> &sBuffer, Int cMask[4], Int &x, Int &y) = 0;
44
45 bool interpolateZ() const;
46 bool interpolateW() const;
47 Float4 interpolate(Float4 &x, Float4 &D, Float4 &rhw, Pointer<Byte> planeEquation, bool flat, bool perspective, bool clamp);
48
49 const PixelProcessor::State &state;
50 const SpirvShader *const spirvShader;
51
52 private:
53 void rasterize(Int &yMin, Int &yMax);
54 };
55}
56
57#endif // sw_QuadRasterizer_hpp
58