Powei Feng
c8098a4c15
* gltfio: add Asset/Resource extended implementations - Add gltfio/src/extended to implement an alternate loader for primitives. This is largely based on the implementation in AssetLoader/ResourceLoader - Able to correctly produce flat shading from gltf that only have vertex positions and indices. - This is not hooked into current code and should have no practical effect on gltfio.
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
/*
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* Copyright (C) 2024 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 "ResourceLoaderExtended.h"
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#include "../FFilamentAsset.h"
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#include <backend/BufferDescriptor.h>
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#include <filament/BufferObject.h>
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#include <cgltf.h>
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#include <vector>
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static const auto FREE_CALLBACK = [](void* mem, size_t, void*) {
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free(mem);
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};
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namespace filament::gltfio {
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void ResourceLoaderExtended::loadResources(std::vector<BufferSlot> const& slots,
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filament::Engine* engine, std::vector<BufferObject*>& bufferObjects) {
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for (auto& slot: slots) {
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size_t const byteCount = slot.sizeInBytes;
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if (slot.vertices) {
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BufferObject* bo = BufferObject::Builder().size(byteCount).build(*engine);
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bo->setBuffer(*engine, BufferDescriptor(slot.data, byteCount, FREE_CALLBACK));
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slot.vertices->setBufferObjectAt(*engine, slot.slot, bo);
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bufferObjects.push_back(bo);
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}
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if (slot.indices) {
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slot.indices->setBuffer(*engine, BufferDescriptor(slot.data, byteCount, FREE_CALLBACK));
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}
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if (slot.target) {
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assert_invariant(slot.targetData.positions && slot.targetData.tbn);
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slot.target->setPositionsAt(*engine, slot.slot,
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(float3 const*) slot.targetData.positions, slot.target->getVertexCount());
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slot.target->setTangentsAt(*engine, slot.slot, (short4 const*) slot.targetData.tbn,
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slot.target->getVertexCount());
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free(slot.targetData.positions);
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free(slot.targetData.tbn);
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}
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}
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}
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} // namespace filament::gltfio
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