From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 19 Oct 2014 16:28:24 +0000 (+0300)
Subject: Legacy shader compatibility fixes for OpenGL ES
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=06071181b1fbda51b8a17cbd034f3d36b3fae900

Legacy shader compatibility fixes for OpenGL ES
---

diff --git a/source/programbuilder.cpp b/source/programbuilder.cpp
index 82152200..55d2cf22 100644
--- a/source/programbuilder.cpp
+++ b/source/programbuilder.cpp
@@ -374,6 +374,7 @@ string ProgramBuilder::create_source(const list<ShaderVariable *> &variables, Va
 {
 	string source;
 
+	bool legacy_qualifiers = features.legacy || (get_gl_api()==OPENGL_ES2 && !(get_glsl_version()>=Version(3, 0)));
 	bool use_blocks = !features.legacy && ARB_uniform_buffer_object;
 
 	if(!features.legacy)
@@ -427,13 +428,13 @@ string ProgramBuilder::create_source(const list<ShaderVariable *> &variables, Va
 
 		if(interface&INPUT)
 		{
-			const char *qualifier = (features.legacy ? scope==VERTEX ? "attribute" : "varying" : "in");
+			const char *qualifier = (legacy_qualifiers ? scope==VERTEX ? "attribute" : "varying" : "in");
 			source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope-1]));
 		}
 
 		if(interface&OUTPUT)
 		{
-			const char *qualifier = (features.legacy ? "varying" : "out");
+			const char *qualifier = (legacy_qualifiers ? "varying" : "out");
 			source += format("%s %s;\n", qualifier, (*i)->create_declaration(interfaces[scope]));
 		}
 	}
@@ -687,7 +688,7 @@ ProgramBuilder::StandardFeatures::StandardFeatures():
 	normalmap(false),
 	shadow(false),
 	reflection(false),
-	legacy(!(get_glsl_version()>=Version(1, 30)))
+	legacy(get_gl_api()==OPENGL && !(get_glsl_version()>=Version(1, 30)))
 { }
 
 string ProgramBuilder::StandardFeatures::create_flags() const