From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 21 Feb 2021 23:50:19 +0000 (+0200)
Subject: Check that requested shader stages are supported
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=b482f6d59aca2b4f1d9e2cbcc0f596d62c057509;p=libs%2Fgl.git

Check that requested shader stages are supported
---

diff --git a/source/glsl/compatibility.cpp b/source/glsl/compatibility.cpp
index 34073862..07698394 100644
--- a/source/glsl/compatibility.cpp
+++ b/source/glsl/compatibility.cpp
@@ -88,6 +88,8 @@ void LegacyConverter::apply(Stage &s, const Features &feat)
 {
 	stage = &s;
 	features = feat;
+	if(!supports_stage(s.type))
+		throw unsupported_shader(format("Stage %s is not supported", Stage::get_stage_name(s.type)));
 	visit(s.content);
 }
 
@@ -121,6 +123,19 @@ bool LegacyConverter::check_extension(bool Features::*extension) const
 	return true;
 }
 
+bool LegacyConverter::supports_stage(Stage::Type st) const
+{
+	if(st==Stage::GEOMETRY)
+	{
+		if(features.gl_api==OPENGL_ES2)
+			return check_version(Version(3, 20));
+		else
+			return check_version(Version(1, 50));
+	}
+	else
+		return true;
+}
+
 bool LegacyConverter::supports_unified_interface_syntax() const
 {
 	if(features.gl_api==OPENGL_ES2)
diff --git a/source/glsl/compatibility.h b/source/glsl/compatibility.h
index d3a3a74c..f91f1882 100644
--- a/source/glsl/compatibility.h
+++ b/source/glsl/compatibility.h
@@ -60,6 +60,7 @@ private:
 	virtual void visit(Block &);
 	bool check_version(const Version &) const;
 	bool check_extension(bool Features::*) const;
+	bool supports_stage(Stage::Type) const;
 	bool supports_unified_interface_syntax() const;
 	virtual void visit(VariableReference &);
 	virtual void visit(Assignment &);