scripts/shader-parser.subr

   1 #!/bin/sh
   2
   3 # simple shader parsing "framework"
   4
   5 shader_normalize()
   6 {
   7         echo "$1" | sed 's/^"//; s/"$//; 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 $parsing_shader"
  29                                 ;;
  30                         '}')
  31                                 break
  32                                 ;;
  33                         '')
  34                                 ;;
  35                         *)
  36                                 parse_shaderstage_line "$shaderparser_L" "$shaderparser_A1" "$shaderparser_Aother"
  37                                 ;;
  38                 esac
  39         done
  40         parse_shaderstage_post
  41 }
  42
  43 parse_shader_pre()
  44 {
  45         : replace this function after including
  46 }
  47 parse_shader_line()
  48 {
  49         : replace this function after including
  50 }
  51 parse_shader_post()
  52 {
  53         : replace this function after including
  54 }
  55 parse_shader()
  56 {
  57         parse_shader_pre
  58         while read shaderparser_L shaderparser_A1 shaderparser_Aother; do
  59                 case "`echo "$shaderparser_L" | tr A-Z a-z`" in
  60                         '{')
  61                                 parse_shaderstage
  62                                 ;;
  63                         '}')
  64                                 break
  65                                 ;;
  66                         '')
  67                                 ;;
  68                         *)
  69                                 parse_shader_line "$shaderparser_L" "$shaderparser_A1" "$shaderparser_Aother"
  70                                 ;;
  71                 esac
  72         done
  73         parse_shader_post
  74 }
  75
  76 parse_shaderfile_pre()
  77 {
  78         : replace this function after including
  79 }
  80 parse_shaderfile_post()
  81 {
  82         : replace this function after including
  83 }
  84 parse_shaderfile()
  85 {
  86         parse_shaderfile_pre
  87         while read shaderparser_L; do
  88                 case "$shaderparser_L" in
  89                         '{')
  90                                 parse_shader
  91                                 ;;
  92                         '{')
  93                                 err "brace nesting error in $parsing_shader"
  94                                 ;;
  95                         '')
  96                                 ;;
  97                         *)
  98                                 parsing_shader="`shader_normalize "$shaderparser_L"`"
  99                                 if [ x"$shaderparser_L" != x"$parsing_shader" ]; then
 100                                         warn "normalized shader name $shaderparser_L to $parsing_shader"
 101                                 fi
 102                                 ;;
 103                 esac
 104         done
 105         parse_shaderfile_post
 106 }
 107
 108 shaderparser_strip_comments()
 109 {
 110         sed 's,//.*,,g; s,\r, ,g; s,\shaderparser_t, ,g; s,  *, ,g; s, $,,; s,^ ,,; /^$/ d'
 111 }
 112
 113 parse_shaders()
 114 {
 115         shaderparser_t=`mktemp || echo ".temp"`
 116         for shaderparser_X in "$@"; do
 117                 shaderparser_strip_comments < "$shaderparser_X" > "$shaderparser_t"
 118                 parsing_shaderfile="$shaderparser_X"
 119                 parse_shaderfile < "$shaderparser_t"
 120         done
 121         rm -f "$shaderparser_t"
 122 }