From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 22 Apr 2018 08:43:08 +0000 (+0300)
Subject: Add a function to remove uniforms from ProgramData
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=653b618e65b291a344abb1ee9d08dc5d1fde1094

Add a function to remove uniforms from ProgramData

It may be beneficial to revert to a Technique's default value and its
associated buffers instead of explicitly setting the same value in an
ObjectInstance's private ProgramData.
---

diff --git a/source/programdata.cpp b/source/programdata.cpp
index 8a10f59c..f47fed76 100644
--- a/source/programdata.cpp
+++ b/source/programdata.cpp
@@ -259,6 +259,25 @@ void ProgramData::uniform_matrix4_array(const string &name, unsigned n, const fl
 	uniform(name, new UniformArray<UniformMatrix4x4f>(n, v));
 }
 
+void ProgramData::remove_uniform(const string &name)
+{
+	SlotMap::iterator i = uniform_slots.find(name);
+	if(i!=uniform_slots.end())
+	{
+		vector<Uniform *>::iterator j = uniforms.begin()+i->second;
+		delete *j;
+		uniforms.erase(j);
+
+		for(SlotMap::iterator k=uniform_slots.begin(); k!=uniform_slots.end(); ++k)
+			if(k->second>i->second)
+				--k->second;
+
+		uniform_slots.erase(i);
+
+		dirty = ALL_ONES;
+	}
+}
+
 unsigned ProgramData::compute_slot_mask(const Program::UniformBlockInfo &block) const
 {
 	unsigned mask = 0;
diff --git a/source/programdata.h b/source/programdata.h
index e045c6fd..78f72926 100644
--- a/source/programdata.h
+++ b/source/programdata.h
@@ -172,6 +172,7 @@ public:
 	void uniform4_array(const std::string &, unsigned, const int *);
 	void uniform4_array(const std::string &, unsigned, const float *);
 	void uniform_matrix4_array(const std::string &, unsigned, const float *);
+	void remove_uniform(const std::string &);
 
 private:
 	unsigned compute_slot_mask(const Program::UniformBlockInfo &) const;