In the getOrCreatePipelineLayout function, why are 62 VkDescriptorSetLayoutBinding allocated in one time? Do the shaders correspond to 62 samplers bindings??

[zy4944796]

I am learning the vulkan backend code in filament,and I have read some strange code that created 62 bindings at once. Why would you do that? Do shaders even use that many samplers? I can't find the corresponding sampler declaration in the shader files.

[poweifeng]

This is just setting up the layout of the pipeline. Because Filament has a variety of materials and also different render pass parameters; it's not efficient to create pipelinelayout on the fly. So we create (and cache) generic pipeline layouts, but the actual binding of the descriptors is a much smaller set.