SPIR-V Built-In
FragInvocationCountEXT
Number of fragment shader invocations for a fragment
FragInvocationCountEXT
Decorating a variable with the FragInvocationCountEXT built-in
decoration will make that variable contain the maximum number of fragment
shader invocations for the fragment, as determined by
minSampleShading.
If Sample Shading is not enabled,
FragInvocationCountEXT will be filled with a value of 1.
Valid Usage
VUID-FragInvocationCountEXT-FragInvocationCountEXT-04217
The FragInvocationCountEXT decoration must be used only within the
Fragment Execution Model
VUID-FragInvocationCountEXT-FragInvocationCountEXT-04218
The variable decorated with FragInvocationCountEXT must be
declared using the Input Storage Class
VUID-FragInvocationCountEXT-FragInvocationCountEXT-04219
The variable decorated with FragInvocationCountEXT must be
declared as a scalar 32-bit integer value