X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=tools%2Fglslcompiler.cpp;fp=tools%2Fglslcompiler.cpp;h=0ce5f01d722ac424c064d7a7f64d862f72b16390;hp=74b37ef6b20a2fb5a46e0d19142c460fed346c98;hb=6288c42adde9ee7d39a47de51fa2856cf965dccc;hpb=7f29c6d2a4eee36538d7ccf24980e749592e2444

diff --git a/tools/glslcompiler.cpp b/tools/glslcompiler.cpp
index 74b37ef6..0ce5f01d 100644
--- a/tools/glslcompiler.cpp
+++ b/tools/glslcompiler.cpp
@@ -2,11 +2,13 @@
 #include <msp/core/getopt.h>
 #include <msp/gl/glsl/compiler.h>
 #include <msp/io/print.h>
+#include <msp/strings/utils.h>
 
 class GlslCompiler: public Msp::RegisteredApplication<GlslCompiler>
 {
 private:
 	std::string source_fn;
+	std::map<std::string, int> spec_values;
 	bool parse_only;
 	bool combined;
 	Msp::GL::SL::Stage::Type stage;
@@ -28,11 +30,13 @@ GlslCompiler::GlslCompiler(int argc, char **argv):
 	dump_ast(false)
 {
 	string stage_str;
+	vector<string> spec_values_in;
 
 	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('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_argument("source", source_fn, GetOpt::REQUIRED_ARG).set_help("GLSL file to compile");
 	getopt(argc, argv);
@@ -45,6 +49,21 @@ 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()
@@ -52,6 +71,7 @@ int GlslCompiler::main()
 	GL::SL::Compiler compiler(GL::SL::Features::all());
 	IO::File file(source_fn);
 	compiler.load_source(file, source_fn);
+	compiler.specialize(spec_values);
 	if(!parse_only)
 		compiler.compile(GL::SL::Compiler::PROGRAM);