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/**
* @file llgltfmateriallist.cpp
*
* $LicenseInfo:firstyear=2022&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2022, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#include "llviewerprecompiledheaders.h"
#include "llgltfmateriallist.h"
#include "llassetstorage.h"
#include "llfilesystem.h"
#include "llsdserialize.h"
#include "tinygltf/tiny_gltf.h"
#include <strstream>
LLGLTFMaterialList gGLTFMaterialList;
static LLColor4 get_color(const std::vector<double>& in)
{
LLColor4 out;
for (S32 i = 0; i < llmin((S32)in.size(), 4); ++i)
{
out.mV[i] = in[i];
}
return out;
}
static void set_from_model(LLGLTFMaterial* mat, tinygltf::Model& model)
{
S32 index;
auto& material_in = model.materials[0];
// get albedo texture
index = material_in.pbrMetallicRoughness.baseColorTexture.index;
if (index >= 0)
{
mat->mAlbedoId.set(model.images[index].uri);
}
else
{
mat->mAlbedoId.setNull();
}
// get normal map
index = material_in.normalTexture.index;
if (index >= 0)
{
mat->mNormalId.set(model.images[index].uri);
}
else
{
mat->mNormalId.setNull();
}
// get metallic-roughness texture
index = material_in.pbrMetallicRoughness.metallicRoughnessTexture.index;
if (index >= 0)
{
mat->mMetallicRoughnessId.set(model.images[index].uri);
}
else
{
mat->mMetallicRoughnessId.setNull();
}
// get emissive texture
index = material_in.emissiveTexture.index;
if (index >= 0)
{
mat->mEmissiveId.set(model.images[index].uri);
}
else
{
mat->mEmissiveId.setNull();
}
mat->setAlphaMode(material_in.alphaMode);
mat->mAlphaCutoff = llclamp((F32)material_in.alphaCutoff, 0.f, 1.f);
mat->mAlbedoColor = get_color(material_in.pbrMetallicRoughness.baseColorFactor);
mat->mEmissiveColor = get_color(material_in.emissiveFactor);
mat->mMetallicFactor = llclamp((F32)material_in.pbrMetallicRoughness.metallicFactor, 0.f, 1.f);
mat->mRoughnessFactor = llclamp((F32)material_in.pbrMetallicRoughness.roughnessFactor, 0.f, 1.f);
mat->mDoubleSided = material_in.doubleSided;
}
LLGLTFMaterial* LLGLTFMaterialList::getMaterial(const LLUUID& id)
{
List::iterator iter = mList.find(id);
if (iter == mList.end())
{
LLGLTFMaterial* mat = new LLGLTFMaterial();
mList[id] = mat;
mat->ref();
gAssetStorage->getAssetData(id, LLAssetType::AT_MATERIAL,
[=](const LLUUID& id, LLAssetType::EType asset_type, void* user_data, S32 status, LLExtStat ext_status)
{
if (status)
{
LL_WARNS() << "Error getting material asset data: " << LLAssetStorage::getErrorString(status) << " (" << status << ")" << LL_ENDL;
}
LLFileSystem file(id, asset_type, LLFileSystem::READ);
std::vector<char> buffer;
buffer.resize(file.getSize());
file.read((U8*)&buffer[0], buffer.size());
LLSD asset;
// read file into buffer
std::istrstream str(&buffer[0], buffer.size());
if (LLSDSerialize::deserialize(asset, str, buffer.size()))
{
if (asset.has("version") && asset["version"] == "1.0")
{
if (asset.has("type") && asset["type"].asString() == "GLTF 2.0")
{
if (asset.has("data") && asset["data"].isString())
{
std::string data = asset["data"];
tinygltf::TinyGLTF gltf;
tinygltf::TinyGLTF loader;
std::string error_msg;
std::string warn_msg;
tinygltf::Model model_in;
if (loader.LoadASCIIFromString(&model_in, &error_msg, &warn_msg, data.c_str(), data.length(), ""))
{
set_from_model(mat, model_in);
}
else
{
LL_WARNS() << "Failed to decode material asset: " << LL_ENDL;
LL_WARNS() << warn_msg << LL_ENDL;
LL_WARNS() << error_msg << LL_ENDL;
}
}
}
}
}
else
{
LL_WARNS() << "Failed to deserialize material LLSD" << LL_ENDL;
}
mat->unref();
}, nullptr);
return mat;
}
return iter->second;
}
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