From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 25 Sep 2022 14:49:15 +0000 (+0300)
Subject: Add flat interpolation qualifier for integer inputs in fragment shader
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=46e04b29e95019e4f384d321d29adea1e5fa3ea9

Add flat interpolation qualifier for integer inputs in fragment shader
---

diff --git a/source/glsl/generate.cpp b/source/glsl/generate.cpp
index cc427d05..635d9f15 100644
--- a/source/glsl/generate.cpp
+++ b/source/glsl/generate.cpp
@@ -2,6 +2,7 @@
 #include <msp/core/hash.h>
 #include <msp/core/raii.h>
 #include "generate.h"
+#include "reflect.h"
 
 using namespace std;
 
@@ -105,6 +106,11 @@ VariableDeclaration *InterfaceGenerator::generate_interface(VariableDeclaration
 
 	VariableDeclaration* iface_var = new VariableDeclaration;
 	iface_var->sampling = var.sampling;
+	if(stage->type==Stage::FRAGMENT && iface=="in")
+		if(BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(var.type_declaration))
+			if(BasicTypeDeclaration *elem = get_element_type(*basic))
+				if(elem->kind==BasicTypeDeclaration::INT)
+					iface_var->interpolation = "flat";
 	iface_var->interface = iface;
 	iface_var->type = var.type;
 	iface_var->name = name;