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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.
#include "SetupProcessor.hpp"
#include "Context.hpp"
#include "Polygon.hpp"
#include "Primitive.hpp"
#include "Renderer.hpp"
#include "Pipeline/Constants.hpp"
#include "Pipeline/SetupRoutine.hpp"
#include "Pipeline/SpirvShader.hpp"
#include "System/Debug.hpp"
#include <cstring>
namespace sw {
uint32_t SetupProcessor::States::computeHash()
{
uint32_t *state = reinterpret_cast<uint32_t *>(this);
uint32_t hash = 0;
for(unsigned int i = 0; i < sizeof(States) / sizeof(uint32_t); i++)
{
hash ^= state[i];
}
return hash;
}
bool SetupProcessor::State::operator==(const State &state) const
{
if(hash != state.hash)
{
return false;
}
return *static_cast<const States *>(this) == static_cast<const States &>(state);
}
SetupProcessor::SetupProcessor()
{
setRoutineCacheSize(1024);
}
SetupProcessor::State SetupProcessor::update(const sw::Context *context) const
{
State state;
bool vPosZW = (context->pixelShader && context->pixelShader->hasBuiltinInput(spv::BuiltInFragCoord));
state.isDrawPoint = context->isDrawPoint(true);
state.isDrawLine = context->isDrawLine(true);
state.isDrawTriangle = context->isDrawTriangle(true);
state.applySlopeDepthBias = context->isDrawTriangle(false) && (context->slopeDepthBias != 0.0f);
state.interpolateZ = context->depthBufferActive() || vPosZW;
state.interpolateW = context->pixelShader != nullptr;
state.frontFace = context->frontFace;
state.cullMode = context->cullMode;
state.multiSampleCount = context->sampleCount;
state.enableMultiSampling = (state.multiSampleCount > 1) &&
!(context->isDrawLine(true) && (context->lineRasterizationMode == VK_LINE_RASTERIZATION_MODE_BRESENHAM_EXT));
state.rasterizerDiscard = context->rasterizerDiscard;
state.numClipDistances = context->vertexShader->getNumOutputClipDistances();
state.numCullDistances = context->vertexShader->getNumOutputCullDistances();
if(context->pixelShader)
{
for(int interpolant = 0; interpolant < MAX_INTERFACE_COMPONENTS; interpolant++)
{
state.gradient[interpolant] = context->pixelShader->inputs[interpolant];
}
}
state.hash = state.computeHash();
return state;
}
SetupProcessor::RoutineType SetupProcessor::routine(const State &state)
{
auto routine = routineCache->lookup(state);
if(!routine)
{
SetupRoutine *generator = new SetupRoutine(state);
generator->generate();
routine = generator->getRoutine();
delete generator;
routineCache->add(state, routine);
}
return routine;
}
void SetupProcessor::setRoutineCacheSize(int cacheSize)
{
routineCache = std::make_unique<RoutineCacheType>(clamp(cacheSize, 1, 65536));
}
} // namespace sw