Better way to request features for different GLSL versions

[libs/gl.git] / tools / glslcompiler.cpp

diff --git a/tools/glslcompiler.cpp b/tools/glslcompiler.cpp
index 74b37ef6b20a2fb5a46e0d19142c460fed346c98..c6fe8bcd6673032424cc2c93e80f7b777be557bc 100644 (file)
--- a/tools/glslcompiler.cpp
+++ b/tools/glslcompiler.cpp
@@ -1,12 +1,16 @@
 #include <msp/core/application.h>
 #include <msp/core/getopt.h>
 #include <msp/gl/glsl/compiler.h>
+#include <msp/gl/glsl/glsl_error.h>
 #include <msp/io/print.h>
+#include <msp/strings/utils.h>
 
 class GlslCompiler: public Msp::RegisteredApplication<GlslCompiler>
 {
 private:
        std::string source_fn;
+       Msp::GL::SL::Compiler::Mode compile_mode;
+       std::map<std::string, int> spec_values;
        bool parse_only;
        bool combined;
        Msp::GL::SL::Stage::Type stage;
@@ -22,21 +26,36 @@ using namespace std;
 using namespace Msp;
 
 GlslCompiler::GlslCompiler(int argc, char **argv):
+       compile_mode(GL::SL::Compiler::PROGRAM),
        parse_only(false),
        combined(false),
        stage(GL::SL::Stage::SHARED),
        dump_ast(false)
 {
        string stage_str;
+       vector<string> spec_values_in;
+       bool as_module = false;
 
        GetOpt getopt;
        getopt.add_option('c', "combined", combined, GetOpt::NO_ARG).set_help("Output combined GLSL");
        getopt.add_option('a', "dump-ast", dump_ast, GetOpt::NO_ARG).set_help("Dump AST for debugging");
-       getopt.add_option('p', "parse_only", parse_only, GetOpt::NO_ARG).set_help("Only parse the loaded source, don't compile");
+       getopt.add_option('p', "parse_only", parse_only, GetOpt::NO_ARG).set_help("Only parse the loaded source (implies -a)");
+       getopt.add_option('e', "specialize", spec_values_in, GetOpt::REQUIRED_ARG).set_help("Set specialization constant", "NAME:VALUE");
        getopt.add_option('s', "stage", stage_str, GetOpt::REQUIRED_ARG).set_help("Output GLSL for STAGE", "STAGE");
+       getopt.add_option('m', "module", as_module, GetOpt::NO_ARG).set_help("Compile as unspecialized module");
        getopt.add_argument("source", source_fn, GetOpt::REQUIRED_ARG).set_help("GLSL file to compile");
        getopt(argc, argv);
 
+       if(as_module)
+               compile_mode = GL::SL::Compiler::MODULE;
+
+       if(parse_only)
+       {
+               if(!stage_str.empty())
+                       throw usage_error("-s can't be used with -p");
+               dump_ast = true;
+       }
+
        if(stage_str=="vertex")
                stage = GL::SL::Stage::VERTEX;
        else if(stage_str=="geometry")
@@ -45,15 +64,49 @@ GlslCompiler::GlslCompiler(int argc, char **argv):
                stage = GL::SL::Stage::FRAGMENT;
        else if(!dump_ast)
                combined = true;
+
+       for(vector<string>::const_iterator i=spec_values_in.begin(); i!=spec_values_in.end(); ++i)
+       {
+               unsigned colon = i->find(':');
+               if(colon==string::npos || colon==0 || colon+1>=i->size())
+                       throw usage_error("Invalid specialization value");
+
+               string value_str = i->substr(colon+1);
+               int value;
+               if(isnumrc(value_str))
+                       value = lexical_cast<int>(value_str);
+               else
+                       value = lexical_cast<bool>(value_str);
+               spec_values[i->substr(0, colon)] = value;
+       }
 }
 
 int GlslCompiler::main()
 {
-       GL::SL::Compiler compiler(GL::SL::Features::all());
+       GL::SL::Compiler compiler(GL::SL::Features::latest());
        IO::File file(source_fn);
        compiler.load_source(file, source_fn);
+       if(compile_mode==GL::SL::Compiler::PROGRAM)
+               compiler.specialize(spec_values);
        if(!parse_only)
-               compiler.compile(GL::SL::Compiler::PROGRAM);
+       {
+               try
+               {
+                       compiler.compile(compile_mode);
+                       string diag = compiler.get_diagnostics();
+                       if(!diag.empty())
+                               IO::print("Diagnostic messages from compiler:\n%s\n", diag);
+               }
+               catch(const GL::SL::invalid_shader_source &exc)
+               {
+                       if(!dump_ast)
+                               throw;
+
+                       IO::print("Compilation resulted in errors:\n%s\n", exc.what());
+                       combined = false;
+                       stage = GL::SL::Stage::SHARED;
+               }
+       }
 
        if(dump_ast)
        {