Free-Slip Texture Buffering

Release 0.6.0-Preview.2

STPFreeSlipTextureBuffer

STPFreeSlipTextureBuffer is a memory manager dedicated for managing texture from free-slip neighbour chunks and merging them into a large local-indexed buffer for free-slip computing; like what STPHeightfieldGenerator does previously.

• STPFreeSlipTextureBuffer can now merge buffer to different memory space (host and device) depends on caller.
• Deprecate memory management in STPHeightfieldGenerator.
• Improve level of abstraction in STPFreeSlipGenerator, which now takes a pointer to STPFreeSlipTextureBuffer instead of a pointer to texture.
• Improve documentation in STPFreeSlipGenerator::STPFreeSlipAdaptor.
• Improve behaviour for STPFreeSlipTextureBuffer when doing repetitive calls to retrieve texture buffer. See documentation for more details.

Future work

• Allocation of pinned memory in STPFreeSlipManagerAdaptor is not pooled currently.

Development on STPSingleHistogramFilter

• We finally decice to swap the order of two separate filter stages in STPSingleHistogramFilter as benchmark shows there's negligible performance difference as the original one. The output histogram from calling STPSingleHistogramFilter is now in row-major order.
• Correct the documentation in STPSingleHistogramFilter so it matches the new algorithm.
• Extract STPSingleHistogramFilter::STPFilterReport as a separate struct and rename it to STPSingleHistogram.
• Add STPSingleHistogramWrapper in SuperAlgorithm+Device for easy STPSingleHistogram access on GPU.

General fixes and improvement

• Rename destroy() in STPSingleHistogramFilter to destroyReport() to avoid confusion.
• Inline more in-source functions in STPSingleHistogramFilter.
• Change the argument in filter execution call in STPSingleHistogramFilter to STPFreeSlipManagerAdaptor for better abstraction.
• Make STPFreeSlipManagerAdaptor into a template class to improve type safety.
• Improve hashing algorithm for vec2 type in STPChunkStorage.
• Remove shared library export symbols for enum and POD-struct.