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