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_PixelRoutine_hpp
16#define sw_PixelRoutine_hpp
17
18#include "Renderer/QuadRasterizer.hpp"
19
20namespace sw
21{
22 class PixelShader;
23 class SamplerCore;
24
25 class PixelRoutine : public sw::QuadRasterizer, public ShaderCore
26 {
27 public:
28 PixelRoutine(const PixelProcessor::State &state, const PixelShader *shader);
29
30 virtual ~PixelRoutine();
31
32 protected:
33 Float4 z[4]; // Multisampled z
34 Float4 w; // Used as is
35 Float4 rhw; // Reciprocal w
36
37 RegisterArray<MAX_FRAGMENT_INPUTS> v; // Varying registers
38
39 // Depth output
40 Float4 oDepth;
41
42 typedef Shader::SourceParameter Src;
43 typedef Shader::DestinationParameter Dst;
44
45 virtual void setBuiltins(Int &x, Int &y, Float4(&z)[4], Float4 &w) = 0;
46 virtual void applyShader(Int cMask[4]) = 0;
47 virtual Bool alphaTest(Int cMask[4]) = 0;
48 virtual void rasterOperation(Float4 &fog, Pointer<Byte> cBuffer[4], Int &x, Int sMask[4], Int zMask[4], Int cMask[4]) = 0;
49
50 virtual void quad(Pointer<Byte> cBuffer[4], Pointer<Byte> &zBuffer, Pointer<Byte> &sBuffer, Int cMask[4], Int &x);
51
52 void alphaTest(Int &aMask, Short4 &alpha);
53 void alphaToCoverage(Int cMask[4], Float4 &alpha);
54 void fogBlend(Vector4f &c0, Float4 &fog);
55 void pixelFog(Float4 &visibility);
56
57 // Raster operations
58 void alphaBlend(int index, Pointer<Byte> &cBuffer, Vector4s &current, Int &x);
59 void logicOperation(int index, Pointer<Byte> &cBuffer, Vector4s &current, Int &x);
60 void writeColor(int index, Pointer<Byte> &cBuffer, Int &i, Vector4s &current, Int &sMask, Int &zMask, Int &cMask);
61 void alphaBlend(int index, Pointer<Byte> &cBuffer, Vector4f &oC, Int &x);
62 void writeColor(int index, Pointer<Byte> &cBuffer, Int &i, Vector4f &oC, Int &sMask, Int &zMask, Int &cMask);
63
64 bool isSRGB(int index) const;
65 UShort4 convertFixed16(Float4 &cf, bool saturate = true);
66 void linearToSRGB12_16(Vector4s &c);
67
68 private:
69 Float4 interpolateCentroid(Float4 &x, Float4 &y, Float4 &rhw, Pointer<Byte> planeEquation, bool flat, bool perspective);
70 void stencilTest(Pointer<Byte> &sBuffer, int q, Int &x, Int &sMask, Int &cMask);
71 void stencilTest(Byte8 &value, StencilCompareMode stencilCompareMode, bool CCW);
72 void stencilOperation(Byte8 &newValue, Byte8 &bufferValue, StencilOperation stencilPassOperation, StencilOperation stencilZFailOperation, StencilOperation stencilFailOperation, bool CCW, Int &zMask, Int &sMask);
73 void stencilOperation(Byte8 &output, Byte8 &bufferValue, StencilOperation operation, bool CCW);
74 Bool depthTest(Pointer<Byte> &zBuffer, int q, Int &x, Float4 &z, Int &sMask, Int &zMask, Int &cMask);
75
76 // Raster operations
77 void blendFactor(Vector4s &blendFactor, const Vector4s &current, const Vector4s &pixel, BlendFactor blendFactorActive);
78 void blendFactorAlpha(Vector4s &blendFactor, const Vector4s &current, const Vector4s &pixel, BlendFactor blendFactorAlphaActive);
79 void readPixel(int index, Pointer<Byte> &cBuffer, Int &x, Vector4s &pixel);
80 void blendFactor(Vector4f &blendFactor, const Vector4f &oC, const Vector4f &pixel, BlendFactor blendFactorActive);
81 void blendFactorAlpha(Vector4f &blendFactor, const Vector4f &oC, const Vector4f &pixel, BlendFactor blendFactorAlphaActive);
82 void writeStencil(Pointer<Byte> &sBuffer, int q, Int &x, Int &sMask, Int &zMask, Int &cMask);
83 void writeDepth(Pointer<Byte> &zBuffer, int q, Int &x, Float4 &z, Int &zMask);
84
85 void sRGBtoLinear16_12_16(Vector4s &c);
86 void linearToSRGB16_12_16(Vector4s &c);
87 Float4 sRGBtoLinear(const Float4 &x);
88
89 bool colorUsed();
90 };
91}
92
93#endif // sw_PixelRoutine_hpp
94