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::Features features;
  13         Msp::GL::SL::Compiler::Mode compile_mode;
  14         std::map<std::string, int> spec_values;
  15         bool parse_only;
  16         bool combined;
  17         Msp::GL::SL::Stage::Type stage;
  18         bool dump_ast;
  19
  20 public:
  21         GlslCompiler(int, char **);
  22
  23         virtual int main();
  24 };
  25
  26 using namespace std;
  27 using namespace Msp;
  28
  29 GlslCompiler::GlslCompiler(int argc, char **argv):
  30         features(GL::SL::Features::latest()),
  31         compile_mode(GL::SL::Compiler::PROGRAM),
  32         parse_only(false),
  33         combined(false),
  34         stage(GL::SL::Stage::SHARED),
  35         dump_ast(false)
  36 {
  37         string stage_str;
  38         vector<string> spec_values_in;
  39         bool as_module = false;
  40         unsigned target_version = 0;
  41
  42         GetOpt getopt;
  43         getopt.add_option('c', "combined", combined, GetOpt::NO_ARG).set_help("Output combined GLSL");
  44         getopt.add_option('a', "dump-ast", dump_ast, GetOpt::NO_ARG).set_help("Dump AST for debugging");
  45         getopt.add_option('p', "parse_only", parse_only, GetOpt::NO_ARG).set_help("Only parse the loaded source (implies -a)");
  46         getopt.add_option('e', "specialize", spec_values_in, GetOpt::REQUIRED_ARG).set_help("Set specialization constant", "NAME:VALUE");
  47         getopt.add_option('s', "stage", stage_str, GetOpt::REQUIRED_ARG).set_help("Output GLSL for STAGE", "STAGE");
  48         getopt.add_option('m', "module", as_module, GetOpt::NO_ARG).set_help("Compile as unspecialized module");
  49         getopt.add_option('t', "target-version", target_version, GetOpt::REQUIRED_ARG).set_help("Specify target GLSL version", "VER");
  50         getopt.add_argument("source", source_fn, GetOpt::REQUIRED_ARG).set_help("GLSL file to compile");
  51         getopt(argc, argv);
  52
  53         if(target_version)
  54                 features = GL::SL::Features::from_version(GL::Version(target_version/100, target_version%100));
  55
  56         if(as_module)
  57                 compile_mode = GL::SL::Compiler::MODULE;
  58
  59         if(parse_only)
  60         {
  61                 if(!stage_str.empty())
  62                         throw usage_error("-s can't be used with -p");
  63                 dump_ast = true;
  64         }
  65
  66         if(stage_str=="vertex")
  67                 stage = GL::SL::Stage::VERTEX;
  68         else if(stage_str=="geometry")
  69                 stage = GL::SL::Stage::GEOMETRY;
  70         else if(stage_str=="fragment")
  71                 stage = GL::SL::Stage::FRAGMENT;
  72         else if(!dump_ast)
  73                 combined = true;
  74
  75         for(vector<string>::const_iterator i=spec_values_in.begin(); i!=spec_values_in.end(); ++i)
  76         {
  77                 unsigned colon = i->find(':');
  78                 if(colon==string::npos || colon==0 || colon+1>=i->size())
  79                         throw usage_error("Invalid specialization value");
  80
  81                 string value_str = i->substr(colon+1);
  82                 int value;
  83                 if(isnumrc(value_str))
  84                         value = lexical_cast<int>(value_str);
  85                 else
  86                         value = lexical_cast<bool>(value_str);
  87                 spec_values[i->substr(0, colon)] = value;
  88         }
  89 }
  90
  91 int GlslCompiler::main()
  92 {
  93         GL::SL::Compiler compiler(features);
  94         IO::File file(source_fn);
  95         compiler.load_source(file, source_fn);
  96         if(compile_mode==GL::SL::Compiler::PROGRAM)
  97                 compiler.specialize(spec_values);
  98         if(!parse_only)
  99         {
 100                 try
 101                 {
 102                         compiler.compile(compile_mode);
 103                         string diag = compiler.get_diagnostics();
 104                         if(!diag.empty())
 105                                 IO::print("Diagnostic messages from compiler:\n%s\n", diag);
 106                 }
 107                 catch(const GL::SL::invalid_shader_source &exc)
 108                 {
 109                         if(!dump_ast)
 110                                 throw;
 111
 112                         IO::print("Compilation resulted in errors:\n%s\n", exc.what());
 113                         combined = false;
 114                         stage = GL::SL::Stage::SHARED;
 115                 }
 116         }
 117
 118         if(dump_ast)
 119         {
 120                 vector<GL::SL::Stage::Type> stages = compiler.get_stages();
 121                 for(vector<GL::SL::Stage::Type>::const_iterator i=stages.begin(); i!=stages.end(); ++i)
 122                         IO::print("%s\n", compiler.get_stage_debug(*i));
 123         }
 124
 125         if(combined)
 126                 IO::print("%s\n", compiler.get_combined_glsl());
 127         else if(stage!=GL::SL::Stage::SHARED)
 128                 IO::print("%s\n", compiler.get_stage_glsl(stage));
 129
 130         return 0;
 131 }