Hi Dominik,
nice and handy piece of code! Thank you for that.
We have also extended the GLSL compiler in order
to retrieve the uniform parameters, I don't recommend
doing that, it took some time! But the results should
be more reliable...
Cheers,
Toni
> Hi.
> I had a similar problem and solved it with this small func. As long as
> your declaration is in one line and comments are only after the ";" it
> works. _uniforms is std::map<string,string>, with the variable name as
> key and the type as value. Because std::map does not allow multiple
> keys, you can use the same map for vertex and fragment shader programs
> with common uniform variables.
>
> HTH, yours,
> Dominik
>
> void GLSLModifier::getUniformValues(const string& shaderAsString){
> stringstream s(shaderAsString);
> string tmp,varname,type;
> while(s.good()){
> s>>tmp;
> if(tmp=="uniform"){
> s>>type>>varname;
> //Get rid of the ";"
> int index=varname.find(";");
> if(index!=string::npos){
> varname.resize(index);
> }
> cout<<"Found uniform variable "<<varname<<" ("<<type<<")"<<endl;
> _uniforms[varname]=type;
> }
> }
> }
>
>
> Marcus Lindblom schrieb:
>
> > Antonio Bleile wrote:
> >
> >> Hi Marcus,
> >>
> >>> No. One needs to parse the shader code by oneself to do that.
> >>>
> >>> However, it shouldn't be that hard. Search and extract data matching
> >>> the
> >>> string "\nuniform <type> <name>;\n" (whitespace handling is optional
> >>> :).
> >>>
> >>> Boost has some good regex & string-algorithm support that should make
> >>> this quite easy (it's on my todo-list.)
> >>
> >>
> >> Yep, but that does not take into account the context... (comments etc).
> >
> >
> > True. Boost has a c-preprocessor though (wave) that could help,
> > although that might be overkill as well.
> >
> >> But one could download the glsl compiler and use the parser:
> >>
> >> http://developer.3dlabs.com/downloads/glslcompiler/index.htm
> >>
> >> Bit of overkill perhaps.
> >
> >
> > Probably. Writing a very small specific parser for just this shouldn't
> > be that hard. I was thinking of making something quite simple just to
> > check my own shaders, so I can live with some restrictions on
> > comments/formatting. Making it generic would take a bit more time, but
> > not overly much so, methinks.
> >
> > /Marcus
> >
> >
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>
>
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