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 23 namespace 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 #if PERF_PROFILE 44 Long cycles[PERF_TIMERS]; 45 #endif 46 47 virtual void quad(Pointer<Byte> cBuffer[4], Pointer<Byte> &zBuffer, Pointer<Byte> &sBuffer, Int cMask[4], Int &x, Int &y) = 0; 48 49 bool interpolateZ() const; 50 bool interpolateW() const; 51 Float4 interpolate(Float4 &x, Float4 &D, Float4 &rhw, Pointer<Byte> planeEquation, bool flat, bool perspective, bool clamp); 52 53 const PixelProcessor::State &state; 54 const PixelShader *const shader; 55 56 private: 57 void rasterize(Int &yMin, Int &yMax); 58 }; 59 } 60 61 #endif // sw_QuadRasterizer_hpp 62