Reflecting resource usage about spirv-reflect

[mbechard]

Yep, I'm already using the accessed member. But that is just a boolean as far as I can tell. What I'd like though is for resources that can be both read from and written to such as storage images and storage buffers, information about whether the shader contains writes (imageStore() or assignment), or reads (imageLoad() or reads) from those storage image or buffers.
That way I can know what VkAccessFlags I need to set on my memory barriers before and after the shader is used.

[chaoticbob]

Hi,

The NON_WRITABLE / NON_READABLE has been raised before. But it's been over a year ago. The last time I visited this with @dneto0, I think the conclusion was that NON_READABLE was actually difficult to determine conclusively. I might be misremembering though.

Regarding the 'accessed' member - by this do you mean block member variables? If that's the case SpvReflectBlockVariable::flags will have SPV_REFLECT_VARIABLE_FLAGS_UNUSED set if the member is unused. For descriptor based resources, SpvReflectDescriptorBinding::accessed should indicate if the resource as been accessed. There is currently a bug #98 with InterlockedMax.

Let me know if I missed something from your questions.