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 "Shader/ShaderCore.hpp"
20#include "Shader/PixelShader.hpp"
21#include "Common/Types.hpp"
22
23namespace sw
24{
25 class QuadRasterizer : public Rasterizer
26 {
27 public:
28 QuadRasterizer(const PixelProcessor::State &state, const PixelShader *shader);
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_FRAGMENT_INPUTS][4];
39 Float4 Df;
40
41 UInt occlusion;
42
43 Int y;
44 Int yMin;
45 Int yMax;
46
47#if PERF_PROFILE
48 Long cycles[PERF_TIMERS];
49#endif
50
51 virtual void quad(Pointer<Byte> cBuffer[4], Pointer<Byte> &zBuffer, Pointer<Byte> &sBuffer, Int cMask[4], Int &x) = 0;
52
53 bool interpolateZ() const;
54 bool interpolateW() const;
55 Float4 interpolate(Float4 &x, Float4 &D, Float4 &rhw, Pointer<Byte> planeEquation, bool flat, bool perspective, bool clamp);
56
57 const PixelProcessor::State &state;
58 const PixelShader *const shader;
59
60 private:
61 void rasterize();
62 };
63}
64
65#endif // sw_QuadRasterizer_hpp
66