Proposed features

[SamoZ256]

• Attributes for AIR backend
• Shader output for SPIRV and GLSL backends
• Support non-structure types as input and output
• Fragment shaders
• Shader input
• Vectors
• Add metadata to AIR backend
• Proper alignment in AIR backend
• Better error handling
• Reflection
• Multiple stages in one shader for GLSL
• More template arguments for texture and sampler
• Matrices
• Directly compiling to IR backends
• Other frontends
  • Metal Shading Language
    • Basic support
    • Enforced semicolons
    • Auto keyword
    • Attributes after name
    • Require including Metal standard library
  • GLSL