unit uengShaderFileConstants;

{$mode objfpc}{$H+}
{$I uengShaderFile.inc}

interface

const
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  PRECOMPILER_STATEMENT_BEGIN = '{';
  PRECOMPILER_STATEMENT_END   = '}';

  TOKEN_CHAR_BEGIN       = '{';
  TOKEN_CHAR_END         = '}';
  TOKEN_CHAR_QUOTE       = '''';
  TOKEN_CHAR_IDENT       = '$';
  TOKEN_CHAR_COMMENT     = '.';
  TOKEN_CHAR_COMMANT_END = ';';
  TOKEN_CHAR_SCOPE_BEGIN = '{';
  TOKEN_CHAR_SCOPE_END   = '}';

  UNKNOWN_FILENAME = 'unknown file';
  TOKEN_LINE_BREAK = sLineBreak;
  TOKEN_NONE       = '[none]';

  TOKEN_CLASS           = TOKEN_CHAR_IDENT + 'CLASS';       //{$CLASS PhongLight $EXTENDS Normal Glow}
  TOKEN_EXTENDS         = TOKEN_CHAR_IDENT + 'EXTENDS';
  TOKEN_INHERITED       = TOKEN_CHAR_IDENT + 'INHERITED';   //{$INHERITED}   {$INHERITED BaseClass}

  TOKEN_INCLUDE         = TOKEN_CHAR_IDENT + 'INCLUDE';     //{$INCLUDE 'Normal.frag'}

  TOKEN_META            = TOKEN_CHAR_IDENT + 'META';        //{$META 'Fuu' 'Bar'}
  TOKEN_VERSION         = TOKEN_CHAR_IDENT + 'VERSION';     //{$META $VERSION 'version'}
  TOKEN_EXTENSION       = TOKEN_CHAR_IDENT + 'EXTENSION';   //{$META $EXTENSION 'GL_ARB_geometry_shader4' 'enable'}
  TOKEN_LAYOUT          = TOKEN_CHAR_IDENT + 'LAYOUT';      //{$META $LAYOUT '(line_strip, max_vertices = 6) out'}

  TOKEN_PROPERTY        = TOKEN_CHAR_IDENT + 'PROPERTY';    //{$PROPERTY InvertRoughmap 'false'}
  TOKEN_DEFINE          = TOKEN_CHAR_IDENT + 'DEFINE';      //{$DEFINE RENDER_FACE_FRONT '0'}
  TOKEN_ECHO            = TOKEN_CHAR_IDENT + 'ECHO';        //{$ECHO InvertRoughmap}

  TOKEN_VAR             = TOKEN_CHAR_IDENT + 'VAR';         //{$VAR 'float' 'refractivity' '0.0'}
  TOKEN_VARYING         = TOKEN_CHAR_IDENT + 'VARYING';     //{$VARYING 'vec3' 'vVertex'}
  TOKEN_UNIFORM         = TOKEN_CHAR_IDENT + 'UNIFORM';     //{$UNIFORM 'sampler2D' 'uShadowMap'}

  TOKEN_CALL            = TOKEN_CHAR_IDENT + 'CALL';        //{$CALL CalcLight}
  TOKEN_PROC            = TOKEN_CHAR_IDENT + 'PROC';        //{$PROC CalcLight} Code... {$END}
  TOKEN_FUNC            = TOKEN_CHAR_IDENT + 'FUNC';        //{$FUND 'float' 'ShadowPoisson' 'vec2' 'shadowMapST' 'float' 'receiver'} Code... {$END}
  TOKEN_MAIN            = TOKEN_CHAR_IDENT + 'MAIN';
  TOKEN_INLINE          = TOKEN_CHAR_IDENT + 'INLINE';      //{$PROC CalcLight $INLINE} Code... {$END}

  TOKEN_IF              = TOKEN_CHAR_IDENT + 'IF';          //{$IF PhongLight = '0'} Code ... {$END}
  TOKEN_ELIF            = TOKEN_CHAR_IDENT + 'ELIF';
  TOKEN_ELSE            = TOKEN_CHAR_IDENT + 'ELSE';
  TOKEN_END             = TOKEN_CHAR_IDENT + 'END';

  TOKEN_MESSAGE         = TOKEN_CHAR_IDENT + 'MESSAGE';     //{$MESSAGE 'message'}
  TOKEN_WARNING         = TOKEN_CHAR_IDENT + 'WARNING';     //{$WARNING 'message'}
  TOKEN_ERROR           = TOKEN_CHAR_IDENT + 'ERROR';       //{$ERROR 'message'}

  TOKEN_OP_LOGICAL_NOT  = TOKEN_CHAR_IDENT + 'NOT';         //{$IF $NOT test}
  TOKEN_OP_LOGICAL_OR   = TOKEN_CHAR_IDENT + 'OR';          //{$IF test1 $OR  test2}
  TOKEN_OP_LOGICAL_AND  = TOKEN_CHAR_IDENT + 'AND';         //{$IF test1 $AND test2}
  TOKEN_OP_LOGICAL_XOR  = TOKEN_CHAR_IDENT + 'XOR';         //{$IF test1 $XOR test2}
  TOKEN_OP_DEFINED      = TOKEN_CHAR_IDENT + 'DEFINED';     //{$IF $DEFINED test2}
  TOKEN_OP_SET          = TOKEN_CHAR_IDENT + 'SET';         //{$IF $SET vVertex}
  TOKEN_OP_ADD          = '+';            //{$IF test1 + test2}
  TOKEN_OP_SUBTRACT     = '-';            //{$IF test1 - test2}
  TOKEN_OP_MULTIPLY     = '*';            //{$IF test1 * test2}
  TOKEN_OP_DIVIDE       = '/';            //{$IF test1 / test2}
  TOKEN_OP_EQUALS       = '=';            //{$IF test1 = test2}
  TOKEN_OP_LESSER       = '<';            //{$IF test1 < test2}
  TOKEN_OP_GREATER      = '>';            //{$IF test1 > test2}
  TOKEN_OP_LEQUALS      = '<=';           //{$IF test1 <= test2}
  TOKEN_OP_GEQUALS      = '>=';           //{$IF test1 >= test2}
  TOKEN_OP_UNEQUALS     = '<>';           //{$IF test1 <> test2}
  TOKEN_OP_BINARY_OR    = '|';            //{$IF test1 | test2}
  TOKEN_OP_BINARY_AND   = '&';            //{$IF test1 & test2}
  TOKEN_OP_BINARY_XOR   = '^';            //{$IF test1 ^ test2}
  TOKEN_OP_BINARY_NOT   = '!';            //{$IF !test1}
  TOKEN_OP_GROUP_BEGIN  = '(';            //{$IF (test1 $OR test2) >= '0'}
  TOKEN_OP_GROUP_END    = ')';

  VALID_IDENT_CHARS  = ['A'..'Z', 'a'..'z', '0'..'9', '_'];
  VALID_TOKEN_CHARS  = ['$'] + VALID_IDENT_CHARS;
  TOKEN_SPLIT_CHARS  = [' ', #9, TOKEN_OP_GROUP_BEGIN, TOKEN_OP_GROUP_END];
  COMMAND_END_TOKENS = [TOKEN_CHAR_COMMANT_END, TOKEN_CHAR_SCOPE_BEGIN, TOKEN_CHAR_SCOPE_END];

  VERSION_EXTRA_COMPAT = 'compatibility';   //{$META $VERSION 'compatibility'}

implementation

end.