From d7e7f87d173156aa12694ce54d688c40a2eabe2e Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 3 Nov 2012 15:53:40 +0200
Subject: [PATCH] Let Batch decide whether appending is possible

---
 source/batch.cpp | 10 ++++++++++
 source/batch.h   |  1 +
 source/mesh.cpp  | 12 +-----------
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/source/batch.cpp b/source/batch.cpp
index 3f7bffee..8807b2c5 100644
--- a/source/batch.cpp
+++ b/source/batch.cpp
@@ -117,6 +117,16 @@ void Batch::append(const vector<unsigned> &ind)
 	dirty = true;
 }
 
+bool Batch::can_append(PrimitiveType other_type)
+{
+	if(other_type!=prim_type)
+		return false;
+	else if(prim_type==LINE_STRIP || prim_type==LINE_LOOP || prim_type==TRIANGLE_FAN || prim_type==POLYGON)
+		return NV_primitive_restart;
+	else
+		return true;
+}
+
 void Batch::append(const Batch &other)
 {
 	if(other.prim_type!=prim_type)
diff --git a/source/batch.h b/source/batch.h
index 92a10e6b..907a0b7f 100644
--- a/source/batch.h
+++ b/source/batch.h
@@ -51,6 +51,7 @@ public:
 
 	Batch &append(unsigned);
 	void append(const std::vector<unsigned> &);
+	bool can_append(PrimitiveType);
 	void append(const Batch &);
 private:
 	void append_index(unsigned);
diff --git a/source/mesh.cpp b/source/mesh.cpp
index 508054a5..572ac619 100644
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,6 +1,5 @@
 #include "buffer.h"
 #include "mesh.h"
-#include "nv_primitive_restart.h"
 #include "renderer.h"
 
 using namespace std;
@@ -63,22 +62,13 @@ float *Mesh::modify_vertex(unsigned i)
 
 void Mesh::add_batch(const Batch &b)
 {
-	bool can_append = false;
-	if(!batches.empty())
-	{
-		PrimitiveType type = b.get_type();
-		can_append = (type==batches.back().get_type() &&
-			type!=LINE_STRIP && type!=LINE_LOOP && type!=POLYGON &&
-			(type!=TRIANGLE_FAN || NV_primitive_restart));
-	}
-
 	if(defer_ibuf)
 	{
 		ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
 		defer_ibuf = false;
 	}
 
-	if(can_append)
+	if(!batches.empty() && batches.back().can_append(b.get_type()))
 		batches.back().append(b);
 	else
 	{
-- 
2.43.0