void MeshSaverImplv1_0::WriteSubMeshData(MeshTemplate* templ,
const MeshTemplate::PrimitiveGroup& gr,
ChunkOutputStream& outStream) {
bool sharedMeshBuffer = false;
MeshBuffer* buffer = templ->GetSharedMeshBuffer();
if (!gr.buffer || gr.buffer == buffer) {
sharedMeshBuffer = true;
} else
buffer = gr.buffer;
{
uint8 primType = (uint8)buffer->GetPrimitiveType();
OutputSerializer& ser = outStream.BeginChunk(MCID_SUBMESH_INFO);
ser << primType;
outStream.EndChunk();
}
if (sharedMeshBuffer) {
{
uint32 start = gr.startVertex;
uint32 count = gr.vertexCount;
OutputSerializer& ser = outStream.BeginChunk(MCID_SHARED_VERTEX_DATA);
ser << start << count;
outStream.EndChunk();
}
{
uint32 start = gr.startIndex;
uint32 count = gr.indexCount;
OutputSerializer& ser = outStream.BeginChunk(MCID_SHARED_INDEX_DATA);
ser << start << count;
outStream.EndChunk();
}
} else {
WriteVertexData(buffer, outStream);
WriteIndexData(buffer, outStream);
}
WriteBoundsInfo(gr.bounds, outStream);
if (gr.material && gr.material != templ->GetSharedMaterial()) {
WriteMaterialData(gr.material, outStream);
}
{
OutputSerializer& ser = outStream.BeginChunk(MCID_SUBMESH_END);
outStream.EndChunk();
}
}
bool DiskCachingFileLoaderCache::MakeCacheSpaceFor(size_t blocks) {
size_t goal = (size_t)maxBlocks_ - blocks;
while (cacheSize_ > goal) {
u16 minGeneration = generation_;
// We increment the iterator inside because we delete things inside.
for (size_t i = 0; i < blockIndexLookup_.size(); ++i) {
if (blockIndexLookup_[i] == INVALID_INDEX) {
continue;
}
auto &info = index_[blockIndexLookup_[i]];
// Check for the minimum seen generation.
// TODO: Do this smarter?
if (info.generation != 0 && info.generation < minGeneration) {
minGeneration = info.generation;
}
// 0 means it was never used yet or was the first read (e.g. block descriptor.)
if (info.generation == oldestGeneration_ || info.generation == 0) {
info.block = INVALID_BLOCK;
info.generation = 0;
info.hits = 0;
--cacheSize_;
// TODO: Doing this in chunks might be a lot better.
WriteIndexData(blockIndexLookup_[i], info);
blockIndexLookup_[i] = INVALID_INDEX;
// Keep going?
if (cacheSize_ <= goal) {
break;
}
}
}
// If we didn't find any, update to the lowest we did find.
oldestGeneration_ = minGeneration;
}
return true;
}
void DiskCachingFileLoaderCache::RebalanceGenerations() {
// To make things easy, we will subtract oldestGeneration_ and cut in half.
// That should give us more space but not break anything.
for (size_t i = 0; i < index_.size(); ++i) {
auto &info = index_[i];
if (info.block == INVALID_BLOCK) {
continue;
}
if (info.generation > oldestGeneration_) {
info.generation = (info.generation - oldestGeneration_) / 2;
// TODO: Doing this all at once would be much better.
WriteIndexData((u32)i, info);
}
}
oldestGeneration_ = 0;
}
void MeshSaverImplv1_0::Save(OutputStreamPtr& out,
AssetSaver& saver) {
try {
MeshTemplate* mesh = static_cast<MeshTemplate*>(
saver.GetRequestPtr()->GetStreamedObject());
WriteVersion(out);
ChunkOutputStream stream(out);
WriteMeshHeader(mesh, stream);
WriteBoundsInfo(mesh->GetBounds(), stream);
MeshBuffer* buffer = mesh->GetSharedMeshBuffer();
MaterialTemplatePtr material = mesh->GetSharedMaterial();
if (buffer) {
WriteVertexData(buffer, stream);
WriteIndexData(buffer, stream);
}
if (material) {
WriteMaterialData(material, stream);
}
uint32 numPrim = mesh->GetNumPrimitiveGroups();
for (uint32 i = 0; i < numPrim; ++i) {
OutputSerializer& ser = stream.BeginChunk(MCID_SUBMESH_DATA);
WriteSubMeshData(mesh, mesh->GetPrimitive(i), stream);
stream.EndChunk();
}
} catch (const GracefulErrorExcept& e) {
saver.GetRequestPtr()->SetCompleted(false);
NEX_THROW(e);
}
saver.GetRequestPtr()->SetCompleted(true);
}
size_t DiskCachingFileLoaderCache::SaveIntoCache(FileLoader *backend, s64 pos, size_t bytes, void *data, FileLoader::Flags flags) {
lock_guard guard(lock_);
if (!f_) {
// Just to keep things working.
return backend->ReadAt(pos, bytes, data, flags);
}
s64 cacheStartPos = pos / blockSize_;
s64 cacheEndPos = (pos + bytes - 1) / blockSize_;
size_t readSize = 0;
size_t offset = (size_t)(pos - (cacheStartPos * (u64)blockSize_));
u8 *p = (u8 *)data;
size_t blocksToRead = 0;
for (s64 i = cacheStartPos; i <= cacheEndPos; ++i) {
auto &info = index_[i];
if (info.block != INVALID_BLOCK) {
break;
}
++blocksToRead;
if (blocksToRead >= MAX_BLOCKS_PER_READ) {
break;
}
}
if (!MakeCacheSpaceFor(blocksToRead) || blocksToRead == 0) {
return 0;
}
if (blocksToRead == 1) {
auto &info = index_[cacheStartPos];
u8 *buf = new u8[blockSize_];
size_t readBytes = backend->ReadAt(cacheStartPos * (u64)blockSize_, blockSize_, buf, flags);
// Check if it was written while we were busy. Might happen if we thread.
if (info.block == INVALID_BLOCK && readBytes != 0) {
info.block = AllocateBlock((u32)cacheStartPos);
WriteBlockData(info, buf);
WriteIndexData((u32)cacheStartPos, info);
}
size_t toRead = std::min(bytes - readSize, (size_t)blockSize_ - offset);
memcpy(p + readSize, buf + offset, toRead);
readSize += toRead;
delete [] buf;
} else {
u8 *wholeRead = new u8[blocksToRead * blockSize_];
size_t readBytes = backend->ReadAt(cacheStartPos * (u64)blockSize_, blocksToRead * blockSize_, wholeRead, flags);
for (size_t i = 0; i < blocksToRead; ++i) {
auto &info = index_[cacheStartPos + i];
// Check if it was written while we were busy. Might happen if we thread.
if (info.block == INVALID_BLOCK && readBytes != 0) {
info.block = AllocateBlock((u32)cacheStartPos + (u32)i);
WriteBlockData(info, wholeRead + (i * blockSize_));
// TODO: Doing each index together would probably be better.
WriteIndexData((u32)cacheStartPos + (u32)i, info);
}
size_t toRead = std::min(bytes - readSize, (size_t)blockSize_ - offset);
memcpy(p + readSize, wholeRead + (i * blockSize_) + offset, toRead);
readSize += toRead;
}
delete[] wholeRead;
}
cacheSize_ += blocksToRead;
++generation_;
if (generation_ == std::numeric_limits<u16>::max()) {
RebalanceGenerations();
}
return readSize;
}
