src/Pipeline/PixelProgram.hpp

// 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_PixelProgram_hpp
#define sw_PixelProgram_hpp

#include "PixelRoutine.hpp"

namespace sw {

class PixelProgram : public PixelRoutine
{
public:
	PixelProgram(
	    const PixelProcessor::State &state,
	    const vk::PipelineLayout *pipelineLayout,
	    const SpirvShader *spirvShader,
	    const vk::Attachments &attachments,
	    const vk::DescriptorSet::Bindings &descriptorSets);

	virtual ~PixelProgram() {}

protected:
	virtual void setBuiltins(Int &x, Int &y, SIMD::Float (&z)[4], SIMD::Float &w, Int cMask[4], const SampleSet &samples);
	virtual void executeShader(Int cMask[4], Int sMask[4], Int zMask[4], const SampleSet &samples);
	virtual Bool alphaTest(Int cMask[4], const SampleSet &samples);
	virtual void blendColor(Pointer<Byte> cBuffer[4], Int &x, Int sMask[4], Int zMask[4], Int cMask[4], const SampleSet &samples);

private:
	// Color outputs
	SIMD::Float4 c[MAX_COLOR_BUFFERS];

	// Raster operations
	void clampColor(SIMD::Float4 color[MAX_COLOR_BUFFERS]);

	static SIMD::Int maskAny(Int cMask[4], const SampleSet &samples);
	static SIMD::Int maskAny(Int cMask[4], Int sMask[4], Int zMask[4], const SampleSet &samples);
};

}  // namespace sw

#endif