scripts/shader-parser.subr

   1 #!/bin/sh
   2
   3 # simple shader parsing "framework"
   4
   5 shader_normalize()
   6 {
   7         echo "$1" | sed 's/\.\(tga\|jpg\|png\)$//'
   8 }
   9
  10 parse_shaderstage_pre()
  11 {
  12         : replace this function after including
  13 }
  14 parse_shaderstage_line()
  15 {
  16         : replace this function after including
  17 }
  18 parse_shaderstage_post()
  19 {
  20         : replace this function after including
  21 }
  22 parse_shaderstage()
  23 {
  24         parse_shaderstage_pre
  25         while read shaderparser_L shaderparser_A1 shaderparser_Aother; do
  26                 case "`echo "$shaderparser_L" | tr A-Z a-z`" in
  27                         '{')
  28                                 err "brace nesting error in $parsing_shader"
  29                                 ;;
  30                         '}')
  31                                 break
  32                                 ;;
  33                         *)
  34                                 parse_shaderstage_line "$shaderparser_L" "$shaderparser_A1" "$shaderparser_Aother"
  35                                 ;;
  36                 esac
  37         done
  38         parse_shaderstage_post
  39 }
  40
  41 parse_shader_pre()
  42 {
  43         : replace this function after including
  44 }
  45 parse_shader_line()
  46 {
  47         : replace this function after including
  48 }
  49 parse_shader_post()
  50 {
  51         : replace this function after including
  52 }
  53 parse_shader()
  54 {
  55         parse_shader_pre
  56         while read shaderparser_L shaderparser_A1 shaderparser_Aother; do
  57                 case "`echo "$shaderparser_L" | tr A-Z a-z`" in
  58                         '{')
  59                                 parse_shaderstage
  60                                 ;;
  61                         '}')
  62                                 break
  63                                 ;;
  64                         *)
  65                                 parse_shader_line "$shaderparser_L" "$shaderparser_A1" "$shaderparser_Aother"
  66                                 ;;
  67                 esac
  68         done
  69         parse_shader_post
  70 }
  71
  72 parse_shaderfile_pre()
  73 {
  74         : replace this function after including
  75 }
  76 parse_shaderfile_post()
  77 {
  78         : replace this function after including
  79 }
  80 parse_shaderfile()
  81 {
  82         parse_shaderfile_pre
  83         while read shaderparser_L; do
  84                 case "$shaderparser_L" in
  85                         '{')
  86                                 parse_shader
  87                                 ;;
  88                         '{')
  89                                 err "brace nesting error in $parsing_shader"
  90                                 ;;
  91                         '')
  92                                 ;;
  93                         *)
  94                                 parsing_shader="`shader_normalize "$shaderparser_L"`"
  95                                 if [ x"$shaderparser_L" != x"$parsing_shader" ]; then
  96                                         warn "normalized shader name $shaderparser_L to $parsing_shader"
  97                                 fi
  98                                 ;;
  99                 esac
 100         done
 101         parse_shaderfile_post
 102 }
 103
 104 shaderparser_strip_comments()
 105 {
 106         sed 's,//.*,,g; s,\r, ,g; s,\shaderparser_t, ,g; s,  *, ,g; s, $,,; s,^ ,,; /^$/ d'
 107 }
 108
 109 parse_shaders()
 110 {
 111         shaderparser_t=`mktemp || echo ".temp"`
 112         for shaderparser_X in *.shader; do
 113                 shaderparser_strip_comments < "$shaderparser_X" > "$shaderparser_t"
 114                 parsing_shaderfile="$shaderparser_X"
 115                 parse_shaderfile < "$shaderparser_t"
 116         done
 117         rm -f "$shaderparser_t"
 118 }