glslang.jam

# Copyright 2019 Felipe Magno de Almeida
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)

import type ;
import common ;
import generators ;
import toolset : flags ;
import project ;
import targets ;
import scanner ;
import cpp ;

type.register SPV : spv ;
type.register SHADER : comp vert frag ;

class glsl-scanner : c-scanner
{
}

rule init ( name ? )
{
  if ! $(.initialized)
  {
    .initialized = true ;

    scanner.register glsl-scanner : include ;
    type.set-scanner SHADER : glsl-scanner ;

    generators.register-standard glslang.compile : SHADER : SPV ;
    flags glslang DEFINES <define> ;

    IMPORT $(__name__) : glslang : : glslang ;
  }

  if $(name)
  {
    .glslangValidator = $(name) ;
    check-glslangValidator ;
  }

  if ! $(.glslangValidator)
  {
    check-gslangValidator ;
  }
}

local rule check-gslangValidator ( )
{
  .glslangValidator =  [ common.get-invocation-command glslang : glslangValidator : $(.glslangValidator) ] ;
}

rule glslang ( target : source : requirements * )
{
  local project = [ project.current ] ;

  targets.create-typed-target SPV : $(project) : $(target) : $(source) : $(requirements) ;
}

rule compile ( target : source : requirements * )
{
  glslang-compile $(target) : $(source) ;
  NAME on $(target) = $(.glslangValidator) ;
}

actions glslang-compile
{
  $(.glslangValidator) -V -D$(DEFINES) $(>) -o $(<)
}