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A missing bufferview was causing a crash.

pull/3490/head
Malcolm Tyrrell 2020-11-05 15:02:41 +00:00
parent de610b8ce9
commit 01b2088dd3
1 changed files with 24 additions and 9 deletions
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33
code/AssetLib/glTF2/glTF2Asset.inl
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@ -289,7 +289,8 @@ Ref<T> LazyDict<T>::Retrieve(unsigned int i) {
// Unique ptr prevents memory leak in case of Read throws an exception
auto inst = std::unique_ptr<T>(new T());
inst->id = std::string(mDictId) + "_" + to_string(i);
// Try to make this human readable so it can be used in error messages.
inst->id = std::string(mDictId) + "[" + to_string(i) + "]";
inst->oIndex = i;
ReadMember(obj, "name", inst->name);
inst->Read(obj, mAsset);
@ -637,15 +638,18 @@ inline void Accessor::Read(Value &obj, Asset &r) {
const char *typestr;
type = ReadMember(obj, "type", typestr) ? AttribType::FromString(typestr) : AttribType::SCALAR;
// Check length
unsigned long long byteLength = (unsigned long long)GetBytesPerComponent() * (unsigned long long)count;
if ((byteOffset + byteLength) > bufferView->byteLength || (bufferView->byteOffset + byteOffset + byteLength) > bufferView->buffer->byteLength) {
const uint8_t val_size = 64;
if (bufferView)
{
// Check length
unsigned long long byteLength = (unsigned long long)GetBytesPerComponent() * (unsigned long long)count;
if ((byteOffset + byteLength) > bufferView->byteLength || (bufferView->byteOffset + byteOffset + byteLength) > bufferView->buffer->byteLength) {
const uint8_t val_size = 64;
char val[val_size];
char val[val_size];
ai_snprintf(val, val_size, "%llu, %llu", (unsigned long long)byteOffset, (unsigned long long)byteLength);
throw DeadlyImportError("GLTF: Accessor with offset/length (", val, ") is out of range.");
ai_snprintf(val, val_size, "%llu, %llu", (unsigned long long)byteOffset, (unsigned long long)byteLength);
throw DeadlyImportError("GLTF: Accessor with offset/length (", val, ") is out of range.");
}
}
if (Value *sparseValue = FindObject(obj, "sparse")) {
@ -737,13 +741,24 @@ inline void CopyData(size_t count,
}
}
}
inline std::string getContextForErrorMessages(const std::string& id, const std::string& name)
{
std::string context = id;
if (!name.empty())
{
context += " (\"" + name + "\")";
}
return context;
}
} // namespace
template <class T>
void Accessor::ExtractData(T *&outData) {
uint8_t *data = GetPointer();
if (!data) {
throw DeadlyImportError("GLTF2: data is nullptr.");
throw DeadlyImportError("GLTF2: data is nullptr when extracting data from ", getContextForErrorMessages(id, name));
}
const size_t elemSize = GetElementSize();