From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 3 Apr 2021 16:54:26 +0000 (+0300)
Subject: Add a target version option to the command-line GLSL compiler
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=ccabaf9a1942a3b7a1d048b6dabaee41614e1123;p=libs%2Fgl.git

Add a target version option to the command-line GLSL compiler
---

diff --git a/tools/glslcompiler.cpp b/tools/glslcompiler.cpp
index c6fe8bcd..fdc2f1f1 100644
--- a/tools/glslcompiler.cpp
+++ b/tools/glslcompiler.cpp
@@ -9,6 +9,7 @@ class GlslCompiler: public Msp::RegisteredApplication<GlslCompiler>
 {
 private:
 	std::string source_fn;
+	Msp::GL::SL::Features features;
 	Msp::GL::SL::Compiler::Mode compile_mode;
 	std::map<std::string, int> spec_values;
 	bool parse_only;
@@ -26,6 +27,7 @@ using namespace std;
 using namespace Msp;
 
 GlslCompiler::GlslCompiler(int argc, char **argv):
+	features(GL::SL::Features::latest()),
 	compile_mode(GL::SL::Compiler::PROGRAM),
 	parse_only(false),
 	combined(false),
@@ -35,6 +37,7 @@ GlslCompiler::GlslCompiler(int argc, char **argv):
 	string stage_str;
 	vector<string> spec_values_in;
 	bool as_module = false;
+	unsigned target_version = 0;
 
 	GetOpt getopt;
 	getopt.add_option('c', "combined", combined, GetOpt::NO_ARG).set_help("Output combined GLSL");
@@ -43,9 +46,13 @@ GlslCompiler::GlslCompiler(int argc, char **argv):
 	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_option('t', "target-version", target_version, GetOpt::REQUIRED_ARG).set_help("Specify target GLSL version", "VER");
 	getopt.add_argument("source", source_fn, GetOpt::REQUIRED_ARG).set_help("GLSL file to compile");
 	getopt(argc, argv);
 
+	if(target_version)
+		features = GL::SL::Features::from_version(GL::Version(target_version/100, target_version%100));
+
 	if(as_module)
 		compile_mode = GL::SL::Compiler::MODULE;
 
@@ -83,7 +90,7 @@ GlslCompiler::GlslCompiler(int argc, char **argv):
 
 int GlslCompiler::main()
 {
-	GL::SL::Compiler compiler(GL::SL::Features::latest());
+	GL::SL::Compiler compiler(features);
 	IO::File file(source_fn);
 	compiler.load_source(file, source_fn);
 	if(compile_mode==GL::SL::Compiler::PROGRAM)