Introduce Direct3D 12 renderer backend

[Witek902]

Features to implement:

• [ ] Backbuffers
  • [ ] Frame buffering (for maximum GPU utilization)
  • [ ] V-Sync
  • [ ] Fullscreen
• [ ] Resources:
  • [ ] Textures:
  • [ ] 1D
  • [ ] 2D
  • [ ] 3D
  • [ ] Cube
  • [ ] Texture Layers
  • [ ] Multisample Textures
  • [ ] Block Compressed format support
  • [ ] Buffers:
  • [ ] Vertex and Index Buffers
  • [ ] Constant Buffers
  • [ ] Structured/Raw Buffers
  • [ ] Placed (aliased) resources
  • [ ] Sparse (reserved) resources
• [ ] Shader compilation
  • [ ] Macros support
  • [ ] Getting Shader bytecode
  • [ ] Getting Shader disassembly
• [ ] Pipeline state
  • [ ] Blend, depth, rasterizer states
  • [ ] Vertex Layout
• [ ] Render Targets
  • [ ] Multiple Render Targets (MRT)
  • [ ] 2D Texture layer as a target
  • [ ] 3D Texture slice as a target
• [ ] Resources binding:
  • [ ] Binding Set and Binding Set Layouts
  • [ ] Binding Instances
• [ ] Rendering
  • [ ] Indexed Rendering
  • [ ] Instanced Rendering
• [ ] Texture Samplers
• [ ] Depth/Stencil Buffers
• [ ] Unordered Access Views
• [ ] Compute Shaders
• [ ] Tessellation Primitive Topologies
• [ ] Dynamic resources (copy from CPU to GPU)
  • [ ] Ring buffer for resources renaming
• [ ] Resources readback (copy from GPU to CPU)
• [ ] Geometry shader with Stream Output
• [ ] Multisampling support (+ resolving)
• [ ] Multithreading:
  • [ ] Concurrent resources creation
  • [ ] Creating and using multiple Command Buffers from multiple threads
  • [ ] Executing pre-generated Command Buffers
• [ ] Querying GPU/API capabilities
  • [ ] Available display modes, monitors
  • [ ] Maximum Shader Model level supported
• [ ] Querying stats
• [ ] Resources copying
• [ ] Scissors
• [ ] Debugging support
  • [ ] Resources naming

Useful materials: https://developer.nvidia.com/dx12-dos-and-donts http://www.braynzarsoft.net/viewtutorial/q16390-04-directx-12-braynzar-soft-tutorials