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 23 namespace sw { 24 25 class QuadRasterizer : public Rasterizer 26 { 27 public: 28 QuadRasterizer(const PixelProcessor::State &state, const SpirvShader *spirvShader); 29 virtual ~QuadRasterizer(); 30 31 void generate(); 32 33 protected: 34 Pointer<Byte> constants; 35 36 // Fragment coordinates relative to the polygon's origin 37 // TODO(b/236162233): Use SIMD::Float2 38 SIMD::Float xFragment; 39 SIMD::Float yFragment; 40 41 // B * y + C term of interpolants plane equations 42 SIMD::Float Dz[4]; 43 SIMD::Float Dw; 44 SIMD::Float Dv[MAX_INTERFACE_COMPONENTS]; 45 SIMD::Float Df; 46 SIMD::Float DclipDistance[MAX_CLIP_DISTANCES]; 47 SIMD::Float DcullDistance[MAX_CULL_DISTANCES]; 48 49 UInt occlusion; 50 51 virtual void quad(Pointer<Byte> cBuffer[4], Pointer<Byte> &zBuffer, Pointer<Byte> &sBuffer, Int cMask[4], Int &x, Int &y) = 0; 52 53 bool interpolateZ() const; 54 bool interpolateW() const; 55 SIMD::Float interpolate(SIMD::Float &x, SIMD::Float &D, SIMD::Float &rhw, Pointer<Byte> planeEquation, bool flat, bool perspective); 56 57 const PixelProcessor::State &state; 58 const SpirvShader *const spirvShader; 59 60 private: 61 void rasterize(Int &yMin, Int &yMax); 62 }; 63 64 } // namespace sw 65 66 #endif // sw_QuadRasterizer_hpp 67