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         Msp::GL::SL::Compiler::Mode compile_mode;
  13         std::map<std::string, int> spec_values;
  14         bool parse_only;
  15         bool combined;
  16         Msp::GL::SL::Stage::Type stage;
  17         bool dump_ast;
  18
  19 public:
  20         GlslCompiler(int, char **);
  21
  22         virtual int main();
  23 };
  24
  25 using namespace std;
  26 using namespace Msp;
  27
  28 GlslCompiler::GlslCompiler(int argc, char **argv):
  29         compile_mode(GL::SL::Compiler::PROGRAM),
  30         parse_only(false),
  31         combined(false),
  32         stage(GL::SL::Stage::SHARED),
  33         dump_ast(false)
  34 {
  35         string stage_str;
  36         vector<string> spec_values_in;
  37         bool as_module = false;
  38
  39         GetOpt getopt;
  40         getopt.add_option('c', "combined", combined, GetOpt::NO_ARG).set_help("Output combined GLSL");
  41         getopt.add_option('a', "dump-ast", dump_ast, GetOpt::NO_ARG).set_help("Dump AST for debugging");
  42         getopt.add_option('p', "parse_only", parse_only, GetOpt::NO_ARG).set_help("Only parse the loaded source (implies -a)");
  43         getopt.add_option('e', "specialize", spec_values_in, GetOpt::REQUIRED_ARG).set_help("Set specialization constant", "NAME:VALUE");
  44         getopt.add_option('s', "stage", stage_str, GetOpt::REQUIRED_ARG).set_help("Output GLSL for STAGE", "STAGE");
  45         getopt.add_option('m', "module", as_module, GetOpt::NO_ARG).set_help("Compile as unspecialized module");
  46         getopt.add_argument("source", source_fn, GetOpt::REQUIRED_ARG).set_help("GLSL file to compile");
  47         getopt(argc, argv);
  48
  49         if(as_module)
  50                 compile_mode = GL::SL::Compiler::MODULE;
  51
  52         if(parse_only)
  53         {
  54                 if(!stage_str.empty())
  55                         throw usage_error("-s can't be used with -p");
  56                 dump_ast = true;
  57         }
  58
  59         if(stage_str=="vertex")
  60                 stage = GL::SL::Stage::VERTEX;
  61         else if(stage_str=="geometry")
  62                 stage = GL::SL::Stage::GEOMETRY;
  63         else if(stage_str=="fragment")
  64                 stage = GL::SL::Stage::FRAGMENT;
  65         else if(!dump_ast)
  66                 combined = true;
  67
  68         for(vector<string>::const_iterator i=spec_values_in.begin(); i!=spec_values_in.end(); ++i)
  69         {
  70                 unsigned colon = i->find(':');
  71                 if(colon==string::npos || colon==0 || colon+1>=i->size())
  72                         throw usage_error("Invalid specialization value");
  73
  74                 string value_str = i->substr(colon+1);
  75                 int value;
  76                 if(isnumrc(value_str))
  77                         value = lexical_cast<int>(value_str);
  78                 else
  79                         value = lexical_cast<bool>(value_str);
  80                 spec_values[i->substr(0, colon)] = value;
  81         }
  82 }
  83
  84 int GlslCompiler::main()
  85 {
  86         GL::SL::Compiler compiler(GL::SL::Features::all());
  87         IO::File file(source_fn);
  88         compiler.load_source(file, source_fn);
  89         if(compile_mode==GL::SL::Compiler::PROGRAM)
  90                 compiler.specialize(spec_values);
  91         if(!parse_only)
  92         {
  93                 try
  94                 {
  95                         compiler.compile(compile_mode);
  96                         string diag = compiler.get_diagnostics();
  97                         if(!diag.empty())
  98                                 IO::print("Diagnostic messages from compiler:\n%s\n", diag);
  99                 }
 100                 catch(const GL::SL::invalid_shader_source &exc)
 101                 {
 102                         if(!dump_ast)
 103                                 throw;
 104
 105                         IO::print("Compilation resulted in errors:\n%s\n", exc.what());
 106                         combined = false;
 107                         stage = GL::SL::Stage::SHARED;
 108                 }
 109         }
 110
 111         if(dump_ast)
 112         {
 113                 vector<GL::SL::Stage::Type> stages = compiler.get_stages();
 114                 for(vector<GL::SL::Stage::Type>::const_iterator i=stages.begin(); i!=stages.end(); ++i)
 115                         IO::print("%s\n", compiler.get_stage_debug(*i));
 116         }
 117
 118         if(combined)
 119                 IO::print("%s\n", compiler.get_combined_glsl());
 120         else if(stage!=GL::SL::Stage::SHARED)
 121                 IO::print("%s\n", compiler.get_stage_glsl(stage));
 122
 123         return 0;
 124 }