tree 10cd6365a2ccdad9dc997f3c3fd3721b348e5039
parent a868ccc563eb526deba05533c74c2b6d787b3eaa
author Bill Hollings <bill.hollings@brenwill.com> 1617984417 -0400
committer Bill Hollings <bill.hollings@brenwill.com> 1617984417 -0400

Metal argument buffers support dynamic buffer offsets.

Move dynamic offsets from the Metal argument buffer to an implicit shader buffer.
Add SPIRVToMSLConversionConfiguration::dynamicBufferDescriptors to track dynamic
buffer descriptors, and add SPIRVToMSLConversionResults::needsDynamicOffsetBuffer
to indicate shader needs an implicit buffer to track these dynamic offsets.
Add MVKShaderStageResourceBinding::dynamicOffsetBufferIndex to track a
descriptor's index into the implicit dynamic offsets buffer.
MVKPipelineLayout change how per-descriptor set offsets are calculated and tracked
when using Metal argument buffers, so that resource indexes do not accumulate
across descriptor sets, but dynamic offset buffer indexes do accumulate.
MVKPipelineLayout rearrange order of implicit buffer indexes to give more commonly used
implicit buffers lower indexes to help reduce risk of exhausting discrete buffer bindings.