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Store offset to min mip kv in KtxStorage

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This commit is contained in:
Ryan Huffman 2017-04-26 17:11:19 -07:00
parent 4395cd7ee1
commit 47cf44dc60
3 changed files with 10 additions and 10 deletions
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1
libraries/gpu/src/gpu/Texture.h
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@ -330,6 +330,7 @@ public:
std::string _filename;
std::atomic<uint8_t> _minMipLevelAvailable;
size_t _offsetToMinMipKV;
ktx::KTXDescriptorPointer _ktxDescriptor;
friend class Texture;

17
libraries/gpu/src/gpu/Texture_ktx.cpp
View file

@ -109,18 +109,18 @@ KtxStorage::KtxStorage(const std::string& filename) : _filename(filename) {
if (_ktxDescriptor->images.size() < _ktxDescriptor->header.numberOfMipmapLevels) {
qWarning() << "Bad images found in ktx";
}
auto& keyValues = _ktxDescriptor->keyValues;
auto found = std::find_if(keyValues.begin(), keyValues.end(), [](const ktx::KeyValue& val) -> bool {
return val._key.compare(ktx::HIFI_MIN_POPULATED_MIP_KEY) == 0;
});
if (found != keyValues.end()) {
_minMipLevelAvailable = found->_value[0];
_offsetToMinMipKV = _ktxDescriptor->getValueOffsetForKey(ktx::HIFI_MIN_POPULATED_MIP_KEY);
if (_offsetToMinMipKV) {
auto data = storage->data() + ktx::KTX_HEADER_SIZE + _offsetToMinMipKV;
_minMipLevelAvailable = *data;
} else {
// Assume all mip levels are available
_minMipLevelAvailable = 0;
}
}
// now that we know the ktx, let's get the header info to configure this Texture::Storage:
Format mipFormat = Format::COLOR_BGRA_32;
Format texelFormat = Format::COLOR_SRGBA_32;
@ -195,7 +195,6 @@ void KtxStorage::assignMipData(uint16 level, const storage::StoragePointer& stor
imageData += ktx::KTX_HEADER_SIZE + _ktxDescriptor->header.bytesOfKeyValueData + _ktxDescriptor->images[level]._imageOffset;
imageData += ktx::IMAGE_SIZE_WIDTH;
auto offset = _ktxDescriptor->getValueOffsetForKey(ktx::HIFI_MIN_POPULATED_MIP_KEY);
{
std::lock_guard<std::mutex> lock { _cacheFileWriteMutex };
@ -206,8 +205,8 @@ void KtxStorage::assignMipData(uint16 level, const storage::StoragePointer& stor
memcpy(imageData, storage->data(), _ktxDescriptor->images[level]._imageSize);
_minMipLevelAvailable = level;
if (offset > 0) {
auto minMipKeyData = file->mutableData() + ktx::KTX_HEADER_SIZE + ktx::KV_SIZE_WIDTH + offset;
if (_offsetToMinMipKV > 0) {
auto minMipKeyData = file->mutableData() + ktx::KTX_HEADER_SIZE + _offsetToMinMipKV;
memcpy(minMipKeyData, (void*)&_minMipLevelAvailable, 1);
}
}

2
libraries/ktx/src/ktx/KTX.cpp
View file

@ -126,7 +126,7 @@ size_t KTXDescriptor::getValueOffsetForKey(const std::string& key) const {
size_t offset { 0 };
for (auto& kv : keyValues) {
if (kv._key == key) {
return offset + kv._key.size() + 1;
return offset + ktx::KV_SIZE_WIDTH + kv._key.size() + 1;
}
offset += kv.serializedByteSize();
}