Blender stores all pipelines in a pool. Using a hash it checks if a
the pipeline was already created and the previous could be reused. Due
to performance issues when working with graphics pipelines some equal
operations only used a hash check. For scissors and viewports this isn't
enough and could lead to issues.
This PR fixes this to still perform an exact check if the hash are
equal. Note that the performance drops a bit. And should be countered
with other performance improvements in the future.
Pull Request: https://projects.blender.org/blender/blender/pulls/132005
7e788ec4e4