From 24c58bfd2c3c80d879ec796b2f206bdba8d9e58d Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 25 Jan 2021 04:04:11 +0200
Subject: [PATCH] Throw an exception if there's too many uniforms in a
 ProgramData

I'd rather find out I need to make the mask wider than have a program
unexplainably slow down.
---
 source/programdata.cpp | 13 +++++++------
 source/programdata.h   |  8 ++++++++
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/source/programdata.cpp b/source/programdata.cpp
index 4a6c262a..4d8ca4dd 100644
--- a/source/programdata.cpp
+++ b/source/programdata.cpp
@@ -109,15 +109,16 @@ void ProgramData::uniform(const string &name, Uniform *uni)
 	if(i>=0)
 	{
 		uniforms[i].replace_value(uni);
-
-		if(static_cast<unsigned>(i)<MASK_BITS)
-			dirty |= 1<<i;
-		else  // Force a full update if the mask isn't wide enough
-			dirty = ALL_ONES;
-
+		dirty |= 1<<i;
 		return;
 	}
 
+	if(uniforms.size()>=MASK_BITS)
+	{
+		delete uni;
+		throw too_many_uniforms(name);
+	}
+
 	vector<NamedUniform>::iterator j = lower_bound(uniforms.begin(), uniforms.end(), name, uniform_name_compare);
 
 	NamedUniform nu;
diff --git a/source/programdata.h b/source/programdata.h
index c367097b..d9eaf746 100644
--- a/source/programdata.h
+++ b/source/programdata.h
@@ -2,6 +2,7 @@
 #define MSP_GL_PROGRAMDATA_H_
 
 #include <map>
+#include <stdexcept>
 #include <msp/datafile/objectloader.h>
 #include "datatype.h"
 #include "matrix.h"
@@ -11,6 +12,13 @@
 namespace Msp {
 namespace GL {
 
+class too_many_uniforms: public std::runtime_error
+{
+public:
+	too_many_uniforms(const std::string &w): std::runtime_error(w) { }
+	virtual ~too_many_uniforms() throw() { }
+};
+
 class Buffer;
 class Uniform;
 class UniformBlock;
-- 
2.43.0