From 8ff00c9663371684f69059a548f8a0addca10d5c Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 26 Aug 2012 12:42:14 +0300
Subject: [PATCH] Pass the UniformBlockInfo to get_block to avoid an
 unnecessary lookup

---
 source/programdata.cpp | 24 ++++++++++++------------
 source/programdata.h   |  5 ++++-
 2 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/source/programdata.cpp b/source/programdata.cpp
index 04fdd6b8..3e3f18db 100644
--- a/source/programdata.cpp
+++ b/source/programdata.cpp
@@ -150,7 +150,7 @@ void ProgramData::uniform_matrix4_array(const string &name, unsigned n, const fl
 	uniform(name, new UniformArray<UniformMatrix4x4f>(n, v));
 }
 
-const UniformBlock &ProgramData::get_block(const Program &prog, const string &name) const
+const UniformBlock &ProgramData::get_block(const Program &prog, const Program::UniformBlockInfo *info) const
 {
 	if(modified)
 	{
@@ -159,15 +159,7 @@ const UniformBlock &ProgramData::get_block(const Program &prog, const string &na
 		modified = false;
 	}
 
-	const Program::UniformBlockInfo *info = 0;
-	unsigned layout_hash;
-	if(!name.empty())
-	{
-		info = &prog.get_uniform_block_info(name);
-		layout_hash = info->layout_hash;
-	}
-	else
-		layout_hash = prog.get_uniform_layout_hash();
+	unsigned layout_hash = (info ? info->layout_hash : prog.get_uniform_layout_hash());
 
 	map<unsigned, Block>::iterator i = blocks.find(layout_hash);
 	if(i==blocks.end())
@@ -214,6 +206,14 @@ const UniformBlock &ProgramData::get_block(const Program &prog, const string &na
 	return block;
 }
 
+const UniformBlock &ProgramData::get_block(const Program &prog, const string &name) const
+{
+	if(name.empty())
+		return get_block(prog, 0);
+	else
+		return get_block(prog, &prog.get_uniform_block_info(name));
+}
+
 void ProgramData::apply() const
 {
 	const Program *prog = Program::current();
@@ -223,11 +223,11 @@ void ProgramData::apply() const
 	const Program::UniformBlockMap &prog_blocks = prog->get_uniform_blocks();
 	for(Program::UniformBlockMap::const_iterator i=prog_blocks.begin(); i!=prog_blocks.end(); ++i)
 	{
-		const UniformBlock &block = get_block(*prog, i->second.name);
+		const UniformBlock &block = get_block(*prog, &i->second);
 		block.apply(i->second.bind_point);
 	}
 
-	const UniformBlock &block = get_block(*prog, string());
+	const UniformBlock &block = get_block(*prog, 0);
 	block.apply(-1);
 }
 
diff --git a/source/programdata.h b/source/programdata.h
index 885804f0..4d80bb77 100644
--- a/source/programdata.h
+++ b/source/programdata.h
@@ -3,6 +3,7 @@
 
 #include <map>
 #include <msp/datafile/objectloader.h>
+#include "program.h"
 
 namespace Msp {
 namespace GL {
@@ -10,7 +11,6 @@ namespace GL {
 class Buffer;
 class Color;
 class Matrix;
-class Program;
 class Uniform;
 class UniformBlock;
 class Vector3;
@@ -81,6 +81,9 @@ public:
 	void uniform4_array(const std::string &, unsigned, const float *);
 	void uniform_matrix4_array(const std::string &, unsigned, const float *);
 
+private:
+	const UniformBlock &get_block(const Program &, const Program::UniformBlockInfo *) const;
+public:
 	const UniformBlock &get_block(const Program &, const std::string &) const;
 
 	void apply() const;
-- 
2.45.2