tools/glslcompiler.cpp

   1 #include <msp/core/application.h>
   2 #include <msp/core/getopt.h>
   3 #include <msp/gl/glsl/compiler.h>
   4 #include <msp/gl/glsl/glsl_error.h>
   5 #include <msp/io/print.h>
   6 #include <msp/strings/utils.h>
   7
   8 class GlslCompiler: public Msp::RegisteredApplication<GlslCompiler>
   9 {
  10 private:
  11         std::string source_fn;
  12         std::map<std::string, int> spec_values;
  13         bool parse_only;
  14         bool combined;
  15         Msp::GL::SL::Stage::Type stage;
  16         bool dump_ast;
  17
  18 public:
  19         GlslCompiler(int, char **);
  20
  21         virtual int main();
  22 };
  23
  24 using namespace std;
  25 using namespace Msp;
  26
  27 GlslCompiler::GlslCompiler(int argc, char **argv):
  28         parse_only(false),
  29         combined(false),
  30         stage(GL::SL::Stage::SHARED),
  31         dump_ast(false)
  32 {
  33         string stage_str;
  34         vector<string> spec_values_in;
  35
  36         GetOpt getopt;
  37         getopt.add_option('c', "combined", combined, GetOpt::NO_ARG).set_help("Output combined GLSL");
  38         getopt.add_option('a', "dump-ast", dump_ast, GetOpt::NO_ARG).set_help("Dump AST for debugging");
  39         getopt.add_option('p', "parse_only", parse_only, GetOpt::NO_ARG).set_help("Only parse the loaded source, don't compile");
  40         getopt.add_option('e', "specialize", spec_values_in, GetOpt::REQUIRED_ARG).set_help("Set specialization constant", "NAME:VALUE");
  41         getopt.add_option('s', "stage", stage_str, GetOpt::REQUIRED_ARG).set_help("Output GLSL for STAGE", "STAGE");
  42         getopt.add_argument("source", source_fn, GetOpt::REQUIRED_ARG).set_help("GLSL file to compile");
  43         getopt(argc, argv);
  44
  45         if(stage_str=="vertex")
  46                 stage = GL::SL::Stage::VERTEX;
  47         else if(stage_str=="geometry")
  48                 stage = GL::SL::Stage::GEOMETRY;
  49         else if(stage_str=="fragment")
  50                 stage = GL::SL::Stage::FRAGMENT;
  51         else if(!dump_ast)
  52                 combined = true;
  53
  54         for(vector<string>::const_iterator i=spec_values_in.begin(); i!=spec_values_in.end(); ++i)
  55         {
  56                 unsigned colon = i->find(':');
  57                 if(colon==string::npos || colon==0 || colon+1>=i->size())
  58                         throw usage_error("Invalid specialization value");
  59
  60                 string value_str = i->substr(colon+1);
  61                 int value;
  62                 if(isnumrc(value_str))
  63                         value = lexical_cast<int>(value_str);
  64                 else
  65                         value = lexical_cast<bool>(value_str);
  66                 spec_values[i->substr(0, colon)] = value;
  67         }
  68 }
  69
  70 int GlslCompiler::main()
  71 {
  72         GL::SL::Compiler compiler(GL::SL::Features::all());
  73         IO::File file(source_fn);
  74         compiler.load_source(file, source_fn);
  75         compiler.specialize(spec_values);
  76         if(!parse_only)
  77         {
  78                 try
  79                 {
  80                         compiler.compile(GL::SL::Compiler::PROGRAM);
  81                 }
  82                 catch(const GL::SL::invalid_shader_source &exc)
  83                 {
  84                         if(!dump_ast)
  85                                 throw;
  86
  87                         IO::print("Compilation resulted in errors:\n%s\n", exc.what());
  88                         combined = false;
  89                         stage = GL::SL::Stage::SHARED;
  90                 }
  91         }
  92
  93         if(dump_ast)
  94         {
  95                 vector<GL::SL::Stage::Type> stages = compiler.get_stages();
  96                 for(vector<GL::SL::Stage::Type>::const_iterator i=stages.begin(); i!=stages.end(); ++i)
  97                         IO::print("%s\n", compiler.get_stage_debug(*i));
  98         }
  99
 100         if(combined)
 101                 IO::print("%s\n", compiler.get_combined_glsl());
 102         else if(stage!=GL::SL::Stage::SHARED)
 103                 IO::print("%s\n", compiler.get_stage_glsl(stage));
 104
 105         return 0;
 106 }