From a93a69e53263005709fa172845b01f81cd1c074c Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 15 Feb 2021 13:25:37 +0200
Subject: [PATCH] Refactor handling of texture sampling functions in
 LegacyConverter

This structure allows to check support for sampler types which don't
have legacy variants for the texture function.
---
 source/glsl/compatibility.cpp | 35 +++++++++++++++++++++--------------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/source/glsl/compatibility.cpp b/source/glsl/compatibility.cpp
index 4e43ae9d..a3b2882d 100644
--- a/source/glsl/compatibility.cpp
+++ b/source/glsl/compatibility.cpp
@@ -145,47 +145,54 @@ bool LegacyConverter::supports_unified_sampling_functions() const
 
 void LegacyConverter::visit(FunctionCall &call)
 {
-	if(call.name=="texture" && !call.declaration && !supports_unified_sampling_functions())
+	if(call.name=="texture")
 	{
+		string sampler_type;
+		type = string();
 		NodeArray<Expression>::iterator i = call.arguments.begin();
 		if(i!=call.arguments.end())
 		{
 			(*i)->visit(*this);
-			if(type=="sampler1D")
+			sampler_type = type;
+
+			for(; i!=call.arguments.end(); ++i)
+				(*i)->visit(*this);
+		}
+
+		if(!supports_unified_sampling_functions())
+		{
+			if(sampler_type=="sampler1D")
 				call.name = "texture1D";
-			else if(type=="sampler2D")
+			else if(sampler_type=="sampler2D")
 				call.name = "texture2D";
-			else if(type=="sampler3D")
+			else if(sampler_type=="sampler3D")
 				call.name = "texture3D";
-			else if(type=="samplerCube")
+			else if(sampler_type=="samplerCube")
 				call.name = "textureCube";
-			else if(type=="sampler1DShadow")
+			else if(sampler_type=="sampler1DShadow")
 				call.name = "shadow1D";
-			else if(type=="sampler2DShadow")
+			else if(sampler_type=="sampler2DShadow")
 				call.name = "shadow2D";
-			else if(type=="sampler1DArray")
+			else if(sampler_type=="sampler1DArray")
 			{
 				check_extension(EXT_texture_array);
 				call.name = "texture1DArray";
 			}
-			else if(type=="sampler2DArray")
+			else if(sampler_type=="sampler2DArray")
 			{
 				check_extension(EXT_texture_array);
 				call.name = "texture2DArray";
 			}
-			else if(type=="sampler1DArrayShadow")
+			else if(sampler_type=="sampler1DArrayShadow")
 			{
 				check_extension(EXT_texture_array);
 				call.name = "shadow1DArray";
 			}
-			else if(type=="sampler2DArrayShadow")
+			else if(sampler_type=="sampler2DArrayShadow")
 			{
 				check_extension(EXT_texture_array);
 				call.name = "shadow2DArray";
 			}
-
-			for(; i!=call.arguments.end(); ++i)
-				(*i)->visit(*this);
 		}
 	}
 	else
-- 
2.43.0