X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fprogramcompiler.cpp;h=6b8d2eb8a6ae75bbd7d5ea74c7fe7bde4e4b39b6;hp=3dc07d80fa4dd2566c069d0cae5bdb4451f7ac5d;hb=7189f63c549e9061789c47726ff8d6d12afca1a0;hpb=a170be7d2b295c4a3bbcea6585634bece3e1638b

diff --git a/source/programcompiler.cpp b/source/programcompiler.cpp
index 3dc07d80..6b8d2eb8 100644
--- a/source/programcompiler.cpp
+++ b/source/programcompiler.cpp
@@ -1,4 +1,8 @@
+#include <msp/core/algorithm.h>
 #include <msp/core/raii.h>
+#include <msp/gl/extensions/arb_explicit_attrib_location.h>
+#include <msp/gl/extensions/arb_gpu_shader5.h>
+#include <msp/gl/extensions/arb_uniform_buffer_object.h>
 #include <msp/gl/extensions/ext_gpu_shader4.h>
 #include <msp/strings/format.h>
 #include <msp/strings/utils.h>
@@ -321,6 +325,11 @@ void ProgramCompiler::Formatter::apply(ProgramSyntax::Stage &s)
 		formatted += '\n';
 	}
 
+	for(vector<const Extension *>::const_iterator i=s.required_extensions.begin(); i!=s.required_extensions.end(); ++i)
+		formatted += format("#extension %s: require\n", (*i)->get_name());
+	if(!s.required_extensions.empty())
+		formatted += '\n';
+
 	Visitor::apply(s);
 }
 
@@ -1776,6 +1785,18 @@ bool ProgramCompiler::LegacyConverter::check_version(const Version &feature_vers
 	return true;
 }
 
+bool ProgramCompiler::LegacyConverter::check_extension(const Extension &extension) const
+{
+	if(!extension)
+		return false;
+
+	vector<const Extension *>::iterator i = find(stage->required_extensions, &extension);
+	if(i==stage->required_extensions.end())
+		stage->required_extensions.push_back(&extension);
+
+	return true;
+}
+
 bool ProgramCompiler::LegacyConverter::supports_unified_interface_syntax() const
 {
 	if(target_api==OPENGL_ES2)
@@ -1844,24 +1865,30 @@ bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
 {
 	if(target_api==OPENGL_ES2)
 		return check_version(Version(3, 0));
+	else if(check_version(Version(3, 30)))
+		return true;
 	else
-		return check_version(Version(3, 30));
+		return check_extension(ARB_explicit_attrib_location);
 }
 
 bool ProgramCompiler::LegacyConverter::supports_centroid_sampling() const
 {
 	if(target_api==OPENGL_ES2)
 		return check_version(Version(3, 0));
+	else if(check_version(Version(1, 20)))
+		return true;
 	else
-		return check_version(Version(1, 20));
+		return check_extension(EXT_gpu_shader4);
 }
 
 bool ProgramCompiler::LegacyConverter::supports_sample_sampling() const
 {
 	if(target_api==OPENGL_ES2)
 		return check_version(Version(3, 20));
+	else if(check_version(Version(4, 0)))
+		return true;
 	else
-		return check_version(Version(4, 0));
+		return check_extension(ARB_gpu_shader5);
 }
 
 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
@@ -1923,8 +1950,12 @@ bool ProgramCompiler::LegacyConverter::supports_interface_blocks(const string &i
 		else
 			return check_version(Version(3, 20));
 	}
+	else if(check_version(Version(1, 50)))
+		return true;
+	else if(iface=="uniform")
+		return check_extension(ARB_uniform_buffer_object);
 	else
-		return check_version(Version(1, 50));
+		return false;
 }
 
 void ProgramCompiler::LegacyConverter::visit(InterfaceBlock &iface)