Support the sample sampling qualifier

[libs/gl.git] / source / programcompiler.cpp

diff --git a/source/programcompiler.cpp b/source/programcompiler.cpp
index 5bb84269f30abe4fcd38198cef0b6a2ae416b2f8..1c84a96dc925f18095368d63aa13aaaf19a7d88d 100644 (file)
--- a/source/programcompiler.cpp
+++ b/source/programcompiler.cpp
@@ -460,6 +460,8 @@ void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
        }
        if(var.constant)
                formatted += "const ";
+       if(!var.interpolation.empty())
+               formatted += format("%s ", var.interpolation);
        if(!var.sampling.empty())
                formatted += format("%s ", var.sampling);
        if(!var.interface.empty() && var.interface!=block_interface)
@@ -1763,6 +1765,22 @@ bool ProgramCompiler::LegacyConverter::supports_interface_layouts() const
                return check_version(Version(3, 30));
 }
 
+bool ProgramCompiler::LegacyConverter::supports_centroid_sampling() const
+{
+       if(target_api==OPENGL_ES2)
+               return check_version(Version(3, 0));
+       else
+               return check_version(Version(1, 20));
+}
+
+bool ProgramCompiler::LegacyConverter::supports_sample_sampling() const
+{
+       if(target_api==OPENGL_ES2)
+               return check_version(Version(3, 20));
+       else
+               return check_version(Version(4, 0));
+}
+
 void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
 {
        if(var.layout && !supports_interface_layouts())
@@ -1790,6 +1808,17 @@ void ProgramCompiler::LegacyConverter::visit(VariableDeclaration &var)
                }
        }
 
+       if(var.sampling=="centroid")
+       {
+               if(!supports_centroid_sampling())
+                       var.sampling = string();
+       }
+       else if(var.sampling=="sample")
+       {
+               if(!supports_sample_sampling())
+                       var.sampling = string();
+       }
+
        if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
        {
                if(stage->type==FRAGMENT && var.interface=="out")