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#include "SetupProcessor.hpp"
16
17#include "Primitive.hpp"
18#include "Polygon.hpp"
19#include "Context.hpp"
20#include "Renderer.hpp"
21#include "Pipeline/SetupRoutine.hpp"
22#include "Pipeline/Constants.hpp"
23#include "Vulkan/VkDebug.hpp"
24#include "Pipeline/SpirvShader.hpp"
25
26#include <cstring>
27
28namespace sw
29{
30 uint32_t SetupProcessor::States::computeHash()
31 {
32 uint32_t *state = reinterpret_cast<uint32_t*>(this);
33 uint32_t hash = 0;
34
35 for(unsigned int i = 0; i < sizeof(States) / sizeof(uint32_t); i++)
36 {
37 hash ^= state[i];
38 }
39
40 return hash;
41 }
42
43 bool SetupProcessor::State::operator==(const State &state) const
44 {
45 if(hash != state.hash)
46 {
47 return false;
48 }
49
50 static_assert(is_memcmparable<State>::value, "Cannot memcmp States");
51 return memcmp(static_cast<const States*>(this), static_cast<const States*>(&state), sizeof(States)) == 0;
52 }
53
54 SetupProcessor::SetupProcessor()
55 {
56 routineCache = nullptr;
57 setRoutineCacheSize(1024);
58 }
59
60 SetupProcessor::~SetupProcessor()
61 {
62 delete routineCache;
63 routineCache = nullptr;
64 }
65
66 SetupProcessor::State SetupProcessor::update(const sw::Context* context) const
67 {
68 State state;
69
70 bool vPosZW = (context->pixelShader && context->pixelShader->hasBuiltinInput(spv::BuiltInFragCoord));
71
72 state.isDrawPoint = context->isDrawPoint(true);
73 state.isDrawLine = context->isDrawLine(true);
74 state.isDrawTriangle = context->isDrawTriangle(true);
75 state.applySlopeDepthBias = context->isDrawTriangle(false) && (context->slopeDepthBias != 0.0f);
76 state.interpolateZ = context->depthBufferActive() || vPosZW;
77 state.interpolateW = context->pixelShader != nullptr;
78 state.frontFace = context->frontFace;
79 state.cullMode = context->cullMode;
80
81 state.multiSample = context->sampleCount;
82 state.rasterizerDiscard = context->rasterizerDiscard;
83
84 if (context->pixelShader)
85 {
86 for (int interpolant = 0; interpolant < MAX_INTERFACE_COMPONENTS; interpolant++)
87 {
88 state.gradient[interpolant] = context->pixelShader->inputs[interpolant];
89 }
90 }
91
92 state.hash = state.computeHash();
93
94 return state;
95 }
96
97 SetupProcessor::RoutineType SetupProcessor::routine(const State &state)
98 {
99 auto routine = routineCache->query(state);
100
101 if(!routine)
102 {
103 SetupRoutine *generator = new SetupRoutine(state);
104 generator->generate();
105 routine = generator->getRoutine();
106 delete generator;
107
108 routineCache->add(state, routine);
109 }
110
111 return routine;
112 }
113
114 void SetupProcessor::setRoutineCacheSize(int cacheSize)
115 {
116 delete routineCache;
117 routineCache = new RoutineCacheType(clamp(cacheSize, 1, 65536));
118 }
119}
120