// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef sw_QuadRasterizer_hpp
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#define sw_QuadRasterizer_hpp
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#include "Rasterizer.hpp"
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#include "Shader/ShaderCore.hpp"
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#include "Shader/PixelShader.hpp"
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#include "Common/Types.hpp"
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namespace sw
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{
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class QuadRasterizer : public Rasterizer
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{
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public:
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QuadRasterizer(const PixelProcessor::State &state, const PixelShader *shader);
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virtual ~QuadRasterizer();
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void generate();
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protected:
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Pointer<Byte> constants;
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Float4 Dz[4];
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Float4 Dw;
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Float4 Dv[MAX_FRAGMENT_INPUTS][4];
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Float4 Df;
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UInt occlusion;
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#if PERF_PROFILE
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Long cycles[PERF_TIMERS];
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#endif
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virtual void quad(Pointer<Byte> cBuffer[4], Pointer<Byte> &zBuffer, Pointer<Byte> &sBuffer, Int cMask[4], Int &x, Int &y) = 0;
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bool interpolateZ() const;
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bool interpolateW() const;
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Float4 interpolate(Float4 &x, Float4 &D, Float4 &rhw, Pointer<Byte> planeEquation, bool flat, bool perspective, bool clamp);
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const PixelProcessor::State &state;
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const PixelShader *const shader;
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private:
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void rasterize(Int &yMin, Int &yMax);
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};
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}
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#endif // sw_QuadRasterizer_hpp
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