Buffer allocation callback function

[harokyang]

After parsing a gltf file, all the buffers are already allocated in host memory

If we can provide a callback function to handle buffer memory allocation while loading
then it is possible to load binary data directly into staging buffer and save one memory copying on host side
very helpful with large size scene

[harokyang]

Or at least provide a method to set custom allocator for std::vector data in tinygltf::Buffer

[syoyo]

There are some situation for reading Buffer data: From base64 encoded string, from URI, from external bin file, from embedded bin section in .glb.

At this time, it would be difficult to provide unified callback function for Buffer allocation.

What is your actual usecase(e.g. want to read large .bin file)?

[harokyang]

I'm doing some real time rendering/video streaming
Large scene and dynamic loading may involved

I'm currently experimenting on adding a new constructor for Model class to pass a custom std::allcoator

[syoyo]

I see. Could you please send a PR? > I'm currently experimenting on adding a new constructor for Model class to pass a custom std::allcoator

[harokyang]

It's on my company's project
I have to reimplement it in a different way before submit to fork on github to avoid copyright issue
It may take some time