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         std::string out_filename;
  20
  21 public:
  22         GlslCompiler(int, char **);
  23
  24         virtual int main();
  25 };
  26
  27 using namespace std;
  28 using namespace Msp;
  29
  30 GlslCompiler::GlslCompiler(int argc, char **argv):
  31         features(GL::SL::Features::latest()),
  32         compile_mode(GL::SL::Compiler::PROGRAM),
  33         parse_only(false),
  34         combined(false),
  35         stage(GL::SL::Stage::SHARED),
  36         dump_ast(false)
  37 {
  38         string stage_str;
  39         vector<string> spec_values_in;
  40         unsigned as_module = 0;
  41         string module_type = "glsl";
  42         unsigned target_version = 0;
  43
  44         GetOpt getopt;
  45         getopt.add_option('c', "combined", combined, GetOpt::NO_ARG).set_help("Output combined GLSL");
  46         getopt.add_option('a', "dump-ast", dump_ast, GetOpt::NO_ARG).set_help("Dump AST for debugging");
  47         getopt.add_option('p', "parse_only", parse_only, GetOpt::NO_ARG).set_help("Only parse the loaded source (implies -a)");
  48         getopt.add_option('e', "specialize", spec_values_in, GetOpt::REQUIRED_ARG).set_help("Set specialization constant", "NAME:VALUE");
  49         getopt.add_option('s', "stage", stage_str, GetOpt::REQUIRED_ARG).set_help("Output GLSL for STAGE", "STAGE");
  50         getopt.add_option('m', "module", module_type, GetOpt::OPTIONAL_ARG).bind_seen_count(as_module).set_help("Compile as unspecialized module");
  51         getopt.add_option('t', "target-version", target_version, GetOpt::REQUIRED_ARG).set_help("Specify target GLSL version", "VER");
  52         getopt.add_option('o', "out-file", out_filename, GetOpt::REQUIRED_ARG).set_help("Write output to file instead of stdout", "FILE");
  53         getopt.add_argument("source", source_fn, GetOpt::REQUIRED_ARG).set_help("GLSL file to compile");
  54         getopt(argc, argv);
  55
  56         if(target_version)
  57                 features = GL::SL::Features::from_version(GL::Version(target_version/100, target_version%100));
  58
  59         if(as_module)
  60         {
  61                 if(module_type=="glsl" || module_type=="GLSL")
  62                         compile_mode = GL::SL::Compiler::MODULE;
  63                 else if(module_type=="spirv" || module_type=="spir-v" || module_type=="SPIRV" || module_type=="SPIR-V")
  64                         compile_mode = GL::SL::Compiler::SPIRV;
  65                 else
  66                         throw usage_error("Invalid module type");
  67         }
  68
  69         if(compile_mode==GL::SL::Compiler::SPIRV && out_filename.empty())
  70                 throw usage_error("-o is required for SPIR-V");
  71
  72         if(parse_only)
  73         {
  74                 if(!stage_str.empty())
  75                         throw usage_error("-s can't be used with -p");
  76                 dump_ast = true;
  77         }
  78
  79         if(!stage_str.empty() && compile_mode==GL::SL::Compiler::SPIRV)
  80                 throw usage_error("-s can't be used with SPIR-V");
  81         else if(stage_str=="vertex")
  82                 stage = GL::SL::Stage::VERTEX;
  83         else if(stage_str=="geometry")
  84                 stage = GL::SL::Stage::GEOMETRY;
  85         else if(stage_str=="fragment")
  86                 stage = GL::SL::Stage::FRAGMENT;
  87         else if(!dump_ast)
  88                 combined = true;
  89
  90         if(!spec_values_in.empty() && as_module)
  91                 throw usage_error("Modules can't be specialized");
  92         for(vector<string>::const_iterator i=spec_values_in.begin(); i!=spec_values_in.end(); ++i)
  93         {
  94                 unsigned colon = i->find(':');
  95                 if(colon==string::npos || colon==0 || colon+1>=i->size())
  96                         throw usage_error("Invalid specialization value");
  97
  98                 string value_str = i->substr(colon+1);
  99                 int value;
 100                 if(isnumrc(value_str))
 101                         value = lexical_cast<int>(value_str);
 102                 else
 103                         value = lexical_cast<bool>(value_str);
 104                 spec_values[i->substr(0, colon)] = value;
 105         }
 106 }
 107
 108 int GlslCompiler::main()
 109 {
 110         GL::SL::Compiler compiler(features);
 111         IO::File file(source_fn);
 112         compiler.load_source(file, source_fn);
 113         if(compile_mode==GL::SL::Compiler::PROGRAM)
 114                 compiler.specialize(spec_values);
 115         if(!parse_only)
 116         {
 117                 try
 118                 {
 119                         compiler.compile(compile_mode);
 120                         string diag = compiler.get_diagnostics();
 121                         if(!diag.empty())
 122                                 IO::print("Diagnostic messages from compiler:\n%s\n", diag);
 123                 }
 124                 catch(const GL::SL::invalid_shader_source &exc)
 125                 {
 126                         if(!dump_ast)
 127                                 throw;
 128
 129                         IO::print("Compilation resulted in errors:\n%s\n", exc.what());
 130                         combined = false;
 131                         stage = GL::SL::Stage::SHARED;
 132                 }
 133         }
 134
 135         if(dump_ast)
 136         {
 137                 vector<GL::SL::Stage::Type> stages = compiler.get_stages();
 138                 for(vector<GL::SL::Stage::Type>::const_iterator i=stages.begin(); i!=stages.end(); ++i)
 139                         IO::print("%s\n", compiler.get_stage_debug(*i));
 140         }
 141
 142         IO::Base *out = &IO::cout;
 143         RefPtr<IO::File> out_file;
 144         if(!out_filename.empty())
 145         {
 146                 out_file = new IO::File(out_filename, IO::M_WRITE);
 147                 out = out_file.get();
 148         }
 149
 150         if(compile_mode==GL::SL::Compiler::SPIRV)
 151         {
 152                 vector<UInt32> code = compiler.get_combined_spirv();
 153                 out->write(reinterpret_cast<char *>(&code.front()), code.size()*4);
 154         }
 155         else if(combined)
 156                 IO::print(*out, "%s\n", compiler.get_combined_glsl());
 157         else if(stage!=GL::SL::Stage::SHARED)
 158                 IO::print(*out, "%s\n", compiler.get_stage_glsl(stage));
 159
 160         return 0;
 161 }