Mathias Agopian
8afb11128d
The shader folder is where we generate the glsl, so this is more appropriate.
106 lines
3.8 KiB
C++
106 lines
3.8 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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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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*/
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#include "SamplerBindingMap.h"
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#include "shaders/SibGenerator.h"
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#include <filament/MaterialEnums.h>
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#include <private/filament/SamplerInterfaceBlock.h>
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#include <backend/DriverEnums.h>
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namespace filament {
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using namespace utils;
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using namespace backend;
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void SamplerBindingMap::init(MaterialDomain materialDomain,
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SamplerInterfaceBlock const& perMaterialSib) {
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assert_invariant(mActiveSamplerCount == 0);
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mSamplerNamesBindingMap.reserve(MAX_SAMPLER_COUNT);
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mSamplerNamesBindingMap.resize(MAX_SAMPLER_COUNT);
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// Note: the material variant affects only the sampler types, but cannot affect
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// the actual bindings. For this reason it is okay to use the dummyVariant here.
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uint8_t offset = 0;
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size_t vertexSamplerCount = 0;
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size_t fragmentSamplerCount = 0;
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auto processSamplerGroup = [&](SamplerBindingPoints bindingPoint){
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SamplerInterfaceBlock const* const sib =
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(bindingPoint == SamplerBindingPoints::PER_MATERIAL_INSTANCE) ?
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&perMaterialSib : SibGenerator::getSib(bindingPoint, {});
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if (sib) {
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const auto stageFlags = sib->getStageFlags();
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auto const& list = sib->getSamplerInfoList();
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const size_t samplerCount = list.size();
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if (any(stageFlags & ShaderStageFlags::VERTEX)) {
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vertexSamplerCount += samplerCount;
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}
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if (any(stageFlags & ShaderStageFlags::FRAGMENT)) {
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fragmentSamplerCount += samplerCount;
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}
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mSamplerBlockOffsets[+bindingPoint] = { offset, stageFlags, uint8_t(samplerCount) };
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for (size_t i = 0; i < samplerCount; i++) {
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assert_invariant(mSamplerNamesBindingMap[offset + i].empty());
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mSamplerNamesBindingMap[offset + i] = list[i].uniformName;
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}
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offset += samplerCount;
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}
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};
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switch(materialDomain) {
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case MaterialDomain::SURFACE:
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UTILS_NOUNROLL
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for (size_t i = 0; i < Enum::count<SamplerBindingPoints>(); i++) {
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processSamplerGroup((SamplerBindingPoints)i);
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}
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break;
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case MaterialDomain::POST_PROCESS:
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case MaterialDomain::COMPUTE:
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processSamplerGroup(SamplerBindingPoints::PER_MATERIAL_INSTANCE);
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break;
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}
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mActiveSamplerCount = offset;
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// we shouldn't be using more total samplers than supported
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assert_invariant(vertexSamplerCount + fragmentSamplerCount <= MAX_SAMPLER_COUNT);
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// Here we cannot check for overflow for a given feature level because we don't know
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// what feature level the backend will support. We only know the feature level declared
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// by the material. However, we can at least assert for the highest feature level.
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constexpr size_t MAX_VERTEX_SAMPLER_COUNT =
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backend::FEATURE_LEVEL_CAPS[+FeatureLevel::FEATURE_LEVEL_3].MAX_VERTEX_SAMPLER_COUNT;
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assert_invariant(vertexSamplerCount <= MAX_VERTEX_SAMPLER_COUNT);
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constexpr size_t MAX_FRAGMENT_SAMPLER_COUNT =
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backend::FEATURE_LEVEL_CAPS[+FeatureLevel::FEATURE_LEVEL_3].MAX_FRAGMENT_SAMPLER_COUNT;
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assert_invariant(fragmentSamplerCount <= MAX_FRAGMENT_SAMPLER_COUNT);
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}
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} // namespace filament
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