Project Restructure and Refactor

Release 0.16.6

Project directory restructure

The most noticeable changes in this release is the better organised project directory structure and cleaner build system. Despite this fact, the API is untouched so there aren't many major changes to be made to the codebase.

• Tidy everything up with CMake's source_group.
• Separate SuperAlgorithm+ host and device library into two distinct file trees. This would require a tiny bit of modification to the include paths.
• Refactor the build script a lot.
• Refactor the config file generation function.
• Make sure source and header file subdirectories are consistent.
• Suppress unwanted nvcc warnings.

General fixes and improvement

• In STPTextureDatabase, use std::string_view directly rather than std::optional<std::string_view> for less verbosity.
• Improve STPCamera subscriber, it can now automatically unsubscribe to avoid holding dangling pointer, and no longer requires listener to write user-defined copy/move constructor.
• Remove STPListenerError as being unused.
• Simplify exception message formatting implementation.
• nanobench is no longer downloaded automatically, and use CMake's install target instead, for the sake of compilation time. With that said, you will need to install this library manually on your computer.
• Put STPLayerCache in header because there is no need to use PIMPL for such as small class.
• Simplify naming for various objects in STPSmartDeviceMemory.
• Use type brace initialisation instead of explicit value initialisation in STPSmartDeviceObject.
• Rename functions in STPObjectPool for better simplicity.

Biome

• Replace use of variadic template with std::initializer_list.
• Make behaviour of ascendant access when index is out of bound undefined.
• Refactor biome generator in the demo application. This includes:
  • Move definitions from header to a separate source file.
  • Rename variables for style consistency.
  • Remove using from headers.
• Pass ascendant as reference rather than pointer for standardised representation.
• Rather than storing layers as an array of std::unique_ptr of layer, we initialise all layers at once and store them in a structure, then store this structure as an array member. This significantly reducing the number of memory allocation and avoid memory fragmentation.

STPShaderManager

• Can now automatically scan the shader include directory and load all shader source files as required, thanks to std::filesystem.
• Remove redundant functions.

STPSingleHistogramFilter

• Improve signed integer arithmetic to avoid overflow.
• Replace bit casting implementation with compiler built-in. This change acts as a transition before C++20 thus is temporary.