Synthclipse Preprocessor

Synthclipse Preprocessor (SP) parses GLSL preprocessor directives to omit not reachable commands. It understands the following directives and operators:

  • #if
  • #elif
  • #else
  • #ifdef
  • #ifndef
  • #undef
  • #define
  • defined()

SP comments out not reachable code using “//X~” type of comment (see the screenshot above).


Synthclipse Preprocessor IS NOT 100% conformant with GLSL Preprocessor. For most cases it will work as expected. It is able to evaluate nested if statements and complex logical expressions like:

#if !defined(DEBUG) || SOME_VERSION_DEF > 5

but is NOT ABLE to evaluate macro functions, e.g:

#define MAX(a, b) ((a) > (b) ? (a) : (b))
#if MAX(SOME_VERSION_DEF, 13) != 13

It will just ignore the macro functions.

Because of not being able to parse all GLSL Preprocessor constructions, Synthclipse Preprocessor is turned off by default. But you can easily turn it on by clicking on the “#” icon, on the Uniform Controls View (see the screenshot above).