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7a90869ebdbd2ce0f508abf6b12c90703b8597e9
DarkflameServer/dCommon/LevelFile.cpp
Aaron Kimbrell 7a90869ebd fix: skip the wide null after a scene file particle's effect names 
Before version 46 the u16 after a particle's effect names is the names'
wide null terminator, 0 in every shipped scene file. It is skipped
instead of kept as an unknown value.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-11-10 11:51:49 -06:00

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#include "LevelFile.h"
#include <algorithm>
#include <istream>
#include <stdexcept>
#include "BinaryIO.h"
#include "GeneralUtils.h"
#include "Logger.h"
namespace {
constexpr uint32_t CHNK_HEADER = ('C' + ('H' << 8) + ('N' << 16) + ('K' << 24));
// A fixed size, zero padded name
std::string ReadName64(std::istream& file) {
std::string name(64, '\0');
file.read(name.data(), static_cast<std::streamsize>(name.size()));
if (file.fail()) throw std::runtime_error("Failed to read from istream.");
name.resize(std::min(name.find('\0'), name.size()));
return name;
}
// A u32 count of wide characters
std::string ReadWideString32(std::istream& file) {
std::u16string value;
BinaryIO::ReadString<uint32_t>(file, value);
if (file.fail()) throw std::runtime_error("Failed to read from istream.");
return GeneralUtils::UTF16ToWTF8(value);
}
}
void LevelFile::Read(std::istream& file) {
uint32_t magic = 0;
BinaryIO::BinaryRead(file, magic);
if (magic == CHNK_HEADER) {
// SceneLoader::LoadLvlFile / LvlChunkFile::Read: the file info chunk starts the file and gives where the
// environment, object and particle chunks start (0 for none)
ChunkHeader fileInfo = ReadChunkHeader(file, 0);
file.seekg(fileInfo.startPosition);
ReadFileInfoChunk(file, fileInfo);
chunkHeaders.insert({ fileInfo.id, fileInfo });
version = fileInfo.fileInfo.version;
revision = fileInfo.fileInfo.revision;
if (fileInfo.fileInfo.enviromentChunkStart != 0) {
const auto header = ReadChunkHeader(file, fileInfo.fileInfo.enviromentChunkStart);
chunkHeaders.insert({ header.id, header });
// EnvironmentChunk::ReadLvlChunk2000: where the lighting, skydome and editor settings start
file.seekg(header.startPosition);
BinaryIO::BinaryRead(file, enviroment.lightingStart);
BinaryIO::BinaryRead(file, enviroment.skydomeStart);
BinaryIO::BinaryRead(file, enviroment.editorSettingsStart);
// The client reads all three only when there is lighting
if (enviroment.lightingStart != 0) {
file.seekg(enviroment.lightingStart);
ReadLightingInfo(file);
file.seekg(enviroment.skydomeStart);
ReadSkydomeInfo(file);
file.seekg(enviroment.editorSettingsStart);
ReadEditorSettings(file);
}
}
if (fileInfo.fileInfo.objectChunkStart != 0) {
const auto header = ReadChunkHeader(file, fileInfo.fileInfo.objectChunkStart);
chunkHeaders.insert({ header.id, header });
file.seekg(header.startPosition);
ReadSceneObjectDataChunk(file);
}
if (fileInfo.fileInfo.particleChunkStart != 0) {
const auto header = ReadChunkHeader(file, fileInfo.fileInfo.particleChunkStart);
chunkHeaders.insert({ header.id, header });
file.seekg(header.startPosition);
ReadParticles(file);
}
return;
}
// Scenes from before chunks: a header (SceneLoader::ReadLvlHeader), then each part in turn
file.seekg(0);
ChunkHeader header;
header.id = ChunkTypeID::FileInfo;
BinaryIO::BinaryRead(file, header.chunkVersion);
BinaryIO::BinaryRead(file, header.chunkType);
version = header.chunkVersion;
if (version >= 32) BinaryIO::BinaryRead(file, noEditorSettings);
if (version > 36) BinaryIO::BinaryRead(file, revision);
header.fileInfo.version = version;
header.fileInfo.revision = revision;
chunkHeaders.insert({ header.id, header });
// A newer file is refused ("newer than the client understands")
if (version > 48) {
LOG("Scene file version %u is newer than the client reads; nothing read from it", version);
return;
}
ReadLightingInfo(file);
ReadSkydomeInfo(file);
ReadEditorSettings(file);
ReadSceneObjectDataChunk(file);
ReadSounds(file);
ReadParticles(file);
}
LevelFile::ChunkHeader LevelFile::ReadChunkHeader(std::istream& file, uint32_t start) {
// No check of the magic, as in the client (0x01063a00)
file.seekg(start);
uint32_t magic = 0;
ChunkHeader header;
BinaryIO::BinaryRead(file, magic);
BinaryIO::BinaryRead(file, header.id);
BinaryIO::BinaryRead(file, header.chunkVersion);
BinaryIO::BinaryRead(file, header.chunkType);
BinaryIO::BinaryRead(file, header.size);
BinaryIO::BinaryRead(file, header.startPosition);
return header;
}
void LevelFile::ReadFileInfoChunk(std::istream& file, ChunkHeader& header) {
BinaryIO::BinaryRead(file, header.fileInfo.version);
BinaryIO::BinaryRead(file, header.fileInfo.revision);
BinaryIO::BinaryRead(file, header.fileInfo.enviromentChunkStart);
BinaryIO::BinaryRead(file, header.fileInfo.objectChunkStart);
BinaryIO::BinaryRead(file, header.fileInfo.particleChunkStart);
}
void LevelFile::ReadLightingInfo(std::istream& file) {
// SceneLoader::ReadLightingInfo (0x0102f8f0)
hasLighting = true;
if (version >= 45) BinaryIO::BinaryRead(file, lighting.blendTime);
BinaryIO::BinaryRead(file, lighting.ambient);
BinaryIO::BinaryRead(file, lighting.specular);
BinaryIO::BinaryRead(file, lighting.upperHemi);
BinaryIO::BinaryRead(file, lighting.position);
if (version >= 31) {
if (version < 39) {
BinaryIO::BinaryRead(file, lighting.maxDrawDistances.fogNear);
BinaryIO::BinaryRead(file, lighting.maxDrawDistances.fogFar);
lighting.minDrawDistances.fogNear = lighting.maxDrawDistances.fogNear;
lighting.minDrawDistances.fogFar = lighting.maxDrawDistances.fogFar;
} else {
for (auto* distances : { &lighting.minDrawDistances, &lighting.maxDrawDistances }) {
BinaryIO::BinaryRead(file, distances->fogNear);
BinaryIO::BinaryRead(file, distances->fogFar);
BinaryIO::BinaryRead(file, distances->postFogSolid);
BinaryIO::BinaryRead(file, distances->postFogFade);
BinaryIO::BinaryRead(file, distances->staticObjectDistance);
BinaryIO::BinaryRead(file, distances->dynamicObjectDistance);
}
if (version >= 40) {
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
for (uint32_t i = 0; i < count; ++i) {
SceneCullSetting setting;
BinaryIO::BinaryRead(file, setting.group);
BinaryIO::BinaryRead(file, setting.minDistance);
BinaryIO::BinaryRead(file, setting.maxDistance);
lighting.cullSettings.push_back(setting);
}
}
}
BinaryIO::BinaryRead(file, lighting.fogColor);
}
if (version >= 36) BinaryIO::BinaryRead(file, lighting.directional);
if (version < 42) {
lighting.hasSpawnPoint = true;
BinaryIO::BinaryRead(file, lighting.filePosition);
if (version < 33) {
lighting.spawnPosition = NiPoint3(347.0f, 284.0f, -325.0f);
lighting.spawnRotation = NiQuaternion(0.97082251f, 0.0f, 0.23979919f, 0.0f);
} else {
lighting.spawnPosition = lighting.filePosition;
BinaryIO::BinaryRead(file, lighting.spawnRotation);
}
}
}
void LevelFile::ReadSkydomeInfo(std::istream& file) {
// SceneLoader::ReadSkydomeInfo (0x0102f550)
BinaryIO::ReadString<uint32_t>(file, skydome.filename, BinaryIO::ReadType::String);
if (version >= 34) {
for (auto& filename : skydome.extraFilenames) BinaryIO::ReadString<uint32_t>(file, filename, BinaryIO::ReadType::String);
}
}
void LevelFile::ReadEditorSettings(std::istream& file) {
// SceneLoader::ReadEditorSettings (0x0101b090): their size, then a count of colours; the client keeps the first 32
if (version < 37 || noEditorSettings != 0) return;
uint32_t size = 0;
BinaryIO::BinaryRead(file, size);
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
for (uint32_t i = 0; i < count; ++i) {
NiColor color;
BinaryIO::BinaryRead(file, color);
if (i < 32) editorColors.push_back(color);
}
}
void LevelFile::ReadSceneObjectDataChunk(std::istream& file) {
// SceneLoader::ReadLvlGameObjects: the client has no objects for a file older than version 3 ("Level file is
// unsupported"), and before chunks reads nothing after them either
if (version < 3) return;
uint32_t objectsCount = 0;
BinaryIO::BinaryRead(file, objectsCount);
for (uint32_t i = 0; i < objectsCount; ++i) {
// SceneLoader::ReadLvlObjectData (0x0103ba20)
SceneObject obj;
BinaryIO::BinaryRead(file, obj.id);
BinaryIO::BinaryRead(file, obj.lot);
if (version >= 38) {
int32_t nodeType = 1;
BinaryIO::BinaryRead(file, nodeType);
if (nodeType > -1 && nodeType < 11) obj.nodeType = nodeType;
}
if (version >= 32) BinaryIO::BinaryRead(file, obj.glomId);
BinaryIO::BinaryRead(file, obj.position);
BinaryIO::BinaryRead(file, obj.rotation);
BinaryIO::BinaryRead(file, obj.scale);
const auto config = ReadWideString32(file);
if (version >= 7) {
uint32_t techniqueCount = 0;
BinaryIO::BinaryRead(file, techniqueCount);
if (techniqueCount != 0) {
obj.renderTechniquesName = ReadName64(file);
obj.renderTechniques.resize(techniqueCount);
for (auto& technique : obj.renderTechniques) {
technique.name = ReadName64(file);
BinaryIO::BinaryRead(file, technique.valueCount);
BinaryIO::BinaryRead(file, technique.isColor);
for (auto& value : technique.values) BinaryIO::BinaryRead(file, value);
}
}
}
if (file.fail()) throw std::runtime_error("Failed to read from istream.");
for (const auto& token : GeneralUtils::SplitString(config, '\n')) obj.settings.ParseInsert(token);
objects.push_back(std::move(obj));
}
}
void LevelFile::ReadSounds(std::istream& file) {
// SceneLoader::LoadSounds (0x0103c110), only in files from before chunks
if (version < 5) return;
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
for (uint32_t i = 0; i < count; ++i) {
LevelSound sound;
BinaryIO::BinaryRead(file, sound.position);
if (version < 35) {
// A 260 character name, up to its first null
std::u16string name(260, u'\0');
file.read(reinterpret_cast<char*>(name.data()), static_cast<std::streamsize>(name.size() * sizeof(char16_t)));
name.resize(std::min(name.find(u'\0'), name.size()));
sound.config.Insert<std::u16string>(u"soundName", name);
} else {
for (const auto& token : GeneralUtils::SplitString(ReadWideString32(file), '\n')) sound.config.ParseInsert(token);
}
if (file.fail()) throw std::runtime_error("Failed to read from istream.");
sounds.push_back(std::move(sound));
}
}
void LevelFile::ReadParticles(std::istream& file) {
// SceneLoader::LoadParticles (0x01048320); before version 44 a file may end before them
if (version < 5) return;
if (version < 44 && file.peek() == std::char_traits<char>::eof()) {
file.clear();
return;
}
uint32_t count = 0;
BinaryIO::BinaryRead(file, count);
std::string config;
for (uint32_t i = 0; i < count; ++i) {
LevelParticle particle;
if (version >= 43) BinaryIO::BinaryRead(file, particle.priority);
BinaryIO::BinaryRead(file, particle.position);
BinaryIO::BinaryRead(file, particle.rotation);
particle.effectNames = ReadWideString32(file);
if (version < 46) {
// Before version 46 the effect names end with a wide null
uint16_t nameTerminator{};
BinaryIO::BinaryRead(file, nameTerminator);
} else {
config = ReadWideString32(file);
}
particle.config = config;
if (file.fail()) throw std::runtime_error("Failed to read from istream.");
// The client stops at a particle with no effect
if (particle.effectNames.empty()) break;
particles.push_back(std::move(particle));
}
}
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